48 results on '"Williams, Alexander T."'
Search Results
2. Genome-wide association study of thyroid-stimulating hormone highlights new genes, pathways and associations with thyroid disease
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Williams, Alexander T., Chen, Jing, Coley, Kayesha, Batini, Chiara, Izquierdo, Abril, Packer, Richard, Abner, Erik, Kanoni, Stavroula, Shepherd, David J., Free, Robert C., Hollox, Edward J., Brunskill, Nigel J., Ntalla, Ioanna, Reeve, Nicola, Brightling, Christopher E., Venn, Laura, Adams, Emma, Bee, Catherine, Wallace, Susan E., Pareek, Manish, Hansell, Anna L., Esko, Tõnu, Stow, Daniel, Jacobs, Benjamin M., van Heel, David A., Hennah, William, Rao, Balasubramanya S., Dudbridge, Frank, Wain, Louise V., Shrine, Nick, Tobin, Martin D., and John, Catherine
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- 2023
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3. Author Correction: Multi-ancestry genome-wide association analyses improve resolution of genes and pathways influencing lung function and chronic obstructive pulmonary disease risk
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Shrine, Nick, Izquierdo, Abril G., Chen, Jing, Packer, Richard, Hall, Robert J., Guyatt, Anna L., Batini, Chiara, Thompson, Rebecca J., Pavuluri, Chandan, Malik, Vidhi, Hobbs, Brian D., Moll, Matthew, Kim, Wonji, Tal-Singer, Ruth, Bakke, Per, Fawcett, Katherine A., John, Catherine, Coley, Kayesha, Piga, Noemi Nicole, Pozarickij, Alfred, Lin, Kuang, Millwood, Iona Y., Chen, Zhengming, Li, Liming, Wijnant, Sara R. A., Lahousse, Lies, Brusselle, Guy, Uitterlinden, Andre G., Manichaikul, Ani, Oelsner, Elizabeth C., Rich, Stephen S., Barr, R. Graham, Kerr, Shona M., Vitart, Veronique, Brown, Michael R., Wielscher, Matthias, Imboden, Medea, Jeong, Ayoung, Bartz, Traci M., Gharib, Sina A., Flexeder, Claudia, Karrasch, Stefan, Gieger, Christian, Peters, Annette, Stubbe, Beate, Hu, Xiaowei, Ortega, Victor E., Meyers, Deborah A., Bleecker, Eugene R., Gabriel, Stacey B., Gupta, Namrata, Smith, Albert Vernon, Luan, Jian’an, Zhao, Jing-Hua, Hansen, Ailin F., Langhammer, Arnulf, Willer, Cristen, Bhatta, Laxmi, Porteous, David, Smith, Blair H., Campbell, Archie, Sofer, Tamar, Lee, Jiwon, Daviglus, Martha L., Yu, Bing, Lim, Elise, Xu, Hanfei, O’Connor, George T., Thareja, Gaurav, Albagha, Omar M. E., Suhre, Karsten, Granell, Raquel, Faquih, Tariq O., Hiemstra, Pieter S., Slats, Annelies M., Mullin, Benjamin H., Hui, Jennie, James, Alan, Beilby, John, Patasova, Karina, Hysi, Pirro, Koskela, Jukka T., Wyss, Annah B., Jin, Jianping, Sikdar, Sinjini, Lee, Mikyeong, May-Wilson, Sebastian, Pirastu, Nicola, Kentistou, Katherine A., Joshi, Peter K., Timmers, Paul R. H. J., Williams, Alexander T., Free, Robert C., Wang, Xueyang, Morrison, John L., Gilliland, Frank D., Chen, Zhanghua, Wang, Carol A., Foong, Rachel E., Harris, Sarah E., Taylor, Adele, Redmond, Paul, Cook, James P., Mahajan, Anubha, Lind, Lars, Palviainen, Teemu, Lehtimäki, Terho, Raitakari, Olli T., Kaprio, Jaakko, Rantanen, Taina, Pietiläinen, Kirsi H., Cox, Simon R., Pennell, Craig E., Hall, Graham L., Gauderman, W. James, Brightling, Chris, Wilson, James F., Vasankari, Tuula, Laitinen, Tarja, Salomaa, Veikko, Mook-Kanamori, Dennis O., Timpson, Nicholas J., Zeggini, Eleftheria, Dupuis, Josée, Hayward, Caroline, Brumpton, Ben, Langenberg, Claudia, Weiss, Stefan, Homuth, Georg, Schmidt, Carsten Oliver, Probst-Hensch, Nicole, Jarvelin, Marjo-Riitta, Morrison, Alanna C., Polasek, Ozren, Rudan, Igor, Lee, Joo-Hyeon, Sayers, Ian, Rawlins, Emma L., Dudbridge, Frank, Silverman, Edwin K., Strachan, David P., Walters, Robin G., Morris, Andrew P., London, Stephanie J., Cho, Michael H., Wain, Louise V., Hall, Ian P., and Tobin, Martin D.
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- 2023
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4. Multi-ancestry genome-wide association analyses improve resolution of genes and pathways influencing lung function and chronic obstructive pulmonary disease risk
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Shrine, Nick, Izquierdo, Abril G., Chen, Jing, Packer, Richard, Hall, Robert J., Guyatt, Anna L., Batini, Chiara, Thompson, Rebecca J., Pavuluri, Chandan, Malik, Vidhi, Hobbs, Brian D., Moll, Matthew, Kim, Wonji, Tal-Singer, Ruth, Bakke, Per, Fawcett, Katherine A., John, Catherine, Coley, Kayesha, Piga, Noemi Nicole, Pozarickij, Alfred, Lin, Kuang, Millwood, Iona Y., Chen, Zhengming, Li, Liming, Wijnant, Sara R. A., Lahousse, Lies, Brusselle, Guy, Uitterlinden, Andre G., Manichaikul, Ani, Oelsner, Elizabeth C., Rich, Stephen S., Barr, R. Graham, Kerr, Shona M., Vitart, Veronique, Brown, Michael R., Wielscher, Matthias, Imboden, Medea, Jeong, Ayoung, Bartz, Traci M., Gharib, Sina A., Flexeder, Claudia, Karrasch, Stefan, Gieger, Christian, Peters, Annette, Stubbe, Beate, Hu, Xiaowei, Ortega, Victor E., Meyers, Deborah A., Bleecker, Eugene R., Gabriel, Stacey B., Gupta, Namrata, Smith, Albert Vernon, Luan, Jian’an, Zhao, Jing-Hua, Hansen, Ailin F., Langhammer, Arnulf, Willer, Cristen, Bhatta, Laxmi, Porteous, David, Smith, Blair H., Campbell, Archie, Sofer, Tamar, Lee, Jiwon, Daviglus, Martha L., Yu, Bing, Lim, Elise, Xu, Hanfei, O’Connor, George T., Thareja, Gaurav, Albagha, Omar M. E., Suhre, Karsten, Granell, Raquel, Faquih, Tariq O., Hiemstra, Pieter S., Slats, Annelies M., Mullin, Benjamin H., Hui, Jennie, James, Alan, Beilby, John, Patasova, Karina, Hysi, Pirro, Koskela, Jukka T., Wyss, Annah B., Jin, Jianping, Sikdar, Sinjini, Lee, Mikyeong, May-Wilson, Sebastian, Pirastu, Nicola, Kentistou, Katherine A., Joshi, Peter K., Timmers, Paul R. H. J., Williams, Alexander T., Free, Robert C., Wang, Xueyang, Morrison, John L., Gilliland, Frank D., Chen, Zhanghua, Wang, Carol A., Foong, Rachel E., Harris, Sarah E., Taylor, Adele, Redmond, Paul, Cook, James P., Mahajan, Anubha, Lind, Lars, Palviainen, Teemu, Lehtimäki, Terho, Raitakari, Olli T., Kaprio, Jaakko, Rantanen, Taina, Pietiläinen, Kirsi H., Cox, Simon R., Pennell, Craig E., Hall, Graham L., Gauderman, W. James, Brightling, Chris, Wilson, James F., Vasankari, Tuula, Laitinen, Tarja, Salomaa, Veikko, Mook-Kanamori, Dennis O., Timpson, Nicholas J., Zeggini, Eleftheria, Dupuis, Josée, Hayward, Caroline, Brumpton, Ben, Langenberg, Claudia, Weiss, Stefan, Homuth, Georg, Schmidt, Carsten Oliver, Probst-Hensch, Nicole, Jarvelin, Marjo-Riitta, Morrison, Alanna C., Polasek, Ozren, Rudan, Igor, Lee, Joo-Hyeon, Sayers, Ian, Rawlins, Emma L., Dudbridge, Frank, Silverman, Edwin K., Strachan, David P., Walters, Robin G., Morris, Andrew P., London, Stephanie J., Cho, Michael H., Wain, Louise V., Hall, Ian P., and Tobin, Martin D.
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- 2023
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5. Changes in oxygen delivery during experimental models of cerebral malaria
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Jani, Vinay P., Williams, Alexander T., Carvalho, Leonardo, and Cabrales, Pedro
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- 2023
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6. Prony Analysis of Left Ventricle Pressure and Volume
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Jani, Vinay P., Williams, Alexander T., Jani, Vivek P., Tsai, Amy G., Intaglietta, Marcos, and Cabrales, Pedro
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- 2023
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7. Implications of microvascular dysfunction and nitric oxide mediated inflammation in severe COVID-19 infection
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Jani, Vinay P., Munoz, Carlos J., Govender, Krianthan, Williams, Alexander T., and Cabrales, Pedro
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- 2022
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8. Safety and efficacy of human polymerized hemoglobin on guinea pig resuscitation from hemorrhagic shock
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Muller, Cynthia R., Williams, Alexander T., Walser, Cynthia, Eaker, Allyn M., Sandoval, Jose Luis, Cuddington, Clayton T., Wolfe, Savannah R., Palmer, Andre F., and Cabrales, Pedro
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- 2022
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9. Genetic and clinical characteristics of treatment-resistant depression using primary care records in two UK cohorts
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Fabbri, Chiara, Hagenaars, Saskia P., John, Catherine, Williams, Alexander T., Shrine, Nick, Moles, Louise, Hanscombe, Ken B., Serretti, Alessandro, Shepherd, David J., Free, Robert C., Wain, Louise V., Tobin, Martin D., and Lewis, Cathryn M.
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- 2021
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10. Negative pressure increases microvascular perfusion during severe hemorrhagic shock
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Govender, Krianthan, Munoz, Carlos J., Williams, Alexander T., and Cabrales, Pedro
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- 2021
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11. A Review on Microvascular Hemodynamics: The Control of Blood Flow Distribution and Tissue Oxygenation
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Munoz, Carlos J., Lucas, Alfredo, Williams, Alexander T., and Cabrales, Pedro
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- 2020
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12. Resuscitation from hemorrhagic shock after traumatic brain injury with polymerized hemoglobin
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Muller, Cynthia R., Courelli, Vasiliki, Lucas, Alfredo, Williams, Alexander T., Li, Joyce B., Dos Santos, Fernando, Cuddington, Clayton T., Moses, Savannah R., Palmer, Andre F., Kistler, Erik B., and Cabrales, Pedro
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- 2021
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13. Polymerized albumin restores impaired hemodynamics in endotoxemia and polymicrobial sepsis
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Belcher, Donald A., Williams, Alexander T., Palmer, Andre F., and Cabrales, Pedro
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- 2021
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14. Resuscitation from Hemorrhagic Shock With Fresh and Stored Blood and Polymerized Hemoglobin
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Williams, Alexander T., Lucas, Alfredo, Muller, Cynthia R., Munoz, Carlos, Bolden-Rush, Crystal, Palmer, Andre F., and Cabrales, Pedro
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- 2020
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15. Transfusion of Anaerobically or Conventionally Stored Blood After Hemorrhagic Shock
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Williams, Alexander T., Jani, Vivek P., Nemkov, Travis, Lucas, Alfredo, Yoshida, Tatsuro, Dunham, Andrew, Alessandro, Angelo D’, and Cabrales, Pedro
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- 2019
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16. Cardiac-specific knockout and pharmacological inhibition of Endothelin receptor type B lead to cardiac resistance to extreme hypoxia
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Stobdan, Tsering, Zhou, Dan, Williams, Alexander T., Cabrales, Pedro, and Haddad, Gabriel G.
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- 2018
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17. GBT021601 improves red blood cell health and the pathophysiology of sickle cell disease in a murine model.
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Dufu, Kobina, Alt, Carsten, Strutt, Steven, Partridge, James, Tang, Tzechiang, Siu, Vincent, Liao‐Zou, Hilary, Rademacher, Peter, Williams, Alexander T., Muller, Cynthia R., Geng, Xin, Pochron, Mira Patel, Dang, Annie Nguyen, Cabrales, Pedro, Li, Zhe, Oksenberg, Donna, and Cathers, Brian E.
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SICKLE cell anemia ,ERYTHROCYTES ,PATHOLOGICAL physiology ,HEMOGLOBINS ,SMALL molecules - Abstract
Summary: The pathophysiologic mechanism of sickle cell disease (SCD) involves polymerization of deoxygenated haemoglobin S (HbS), leading to red blood cell (RBC) sickling, decreased RBC deformability, microvascular obstruction, haemolysis, anaemia and downstream clinical complications. Pharmacological increase in the concentration of oxygenated HbS in RBCs has been shown to be a novel approach to inhibit HbS polymerization and reduce RBC sickling and haemolysis. We report that GBT021601, a small molecule that increases HbS‐oxygen affinity, inhibits HbS polymerization and prevents RBC sickling in blood from patients with SCD. Moreover, in a murine model of SCD (SS mice), GBT021601 reduces RBC sickling, improves RBC deformability, prolongs RBC half‐life and restores haemoglobin levels to the normal range, while improving oxygen delivery and increasing tolerance to severe hypoxia. Notably, oral dosing of GBT021601 in animals results in higher levels of Hb occupancy than voxelotor and suggests the feasibility of once‐daily dosing in humans. In summary, GBT021601 improves RBC health and normalizes haemoglobin in SS mice, suggesting that it may be useful for the treatment of SCD. These data are being used as a foundation for clinical research and development of GBT021601. [ABSTRACT FROM AUTHOR]
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- 2023
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18. Mendelian randomisation of eosinophils and other cell types in relation to lung function and disease.
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Guyatt, Anna, John, Catherine, Williams, Alexander T., Shrine, Nick, Reeve, Nicola F., SpiroMeta consortium, Ian Sayers, Hall, Ian, Wain, Louise V., Sheehan, Nuala, Dudbridge, Frank, and Tobin, Martin D.
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PULMONARY eosinophilia ,LUNG diseases ,EOSINOPHILS ,MENDEL'S law ,BLOOD cell count ,OBSTRUCTIVE lung diseases - Published
- 2023
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19. Increases in core temperature counterbalance effects of haemoconcentration on blood viscosity during prolonged exercise in the heat
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Buono, Michael J., Krippes, Taylor, Kolkhorst, Fred W., Williams, Alexander T., and Cabrales, Pedro
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- 2016
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20. Perfusion pressure and blood flow determine microvascular apparent viscosity
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Yalcin, Ozlem, Ortiz, Daniel, Williams, Alexander T., Johnson, Paul C., and Cabrales, Pedro
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- 2015
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21. A Review on Microvascular Hemodynamics: The Control of Blood Flow Distribution, and Tissue Oxygenation
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Munoz, Carlos J, Lucas, Alfredo, Williams, Alexander T, and Cabrales, Pedro
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Mechanotransduction ,Microvascular hemodynamics ,Microcirculation ,Microvascular regulation ,Clinical Sciences ,Hemodynamics ,Nursing ,Nitric Oxide ,Emergency & Critical Care Medicine ,Mechanotransduction, Cellular ,Article ,Oxygen ,Vascular ,Hemorheology ,Microvascular measurements ,Humans ,Endothelium ,Cellular ,Endothelium, Vascular - Abstract
The microcirculation is a complex network of vessels ranging from as large as 100μm to as small as 5μm. This complex network is responsible for the regulation of oxygen to the surrounding tissues and ensures metabolite washout. With a more complete understanding of the microcirculation's physiologic and pathologic tendencies, engineers can create new solutions to combat blood pathologies and shock-related diseases. Over the last number of decades a grown interest in the microcirculation has resulted in the development of fundamental techniques to quantify the microvasculature flow and the release of oxygen to tissues.
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- 2020
22. Deriving a Standardised Recommended Respiratory Disease Codelist Repository for Future Research.
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MacRae, Clare, Whittaker, Hannah, Mukherjee, Mome, Daines, Luke, Morgan, Ann, Iwundu, Chukwuma, Alsallakh, Mohammed, Vasileiou, Eleftheria, O'Rourke, Eimear, Williams, Alexander T, Stone, Philip W, Sheikh, Aziz, and Quint, Jennifer K
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RESPIRATORY diseases ,MEDICAL care ,RESPIRATORY infections ,CHRONIC obstructive pulmonary disease ,MEDICAL personnel - Abstract
Background: Electronic health record (EHR) databases provide rich, longitudinal data on interactions with healthcare providers and can be used to advance research into respiratory conditions. However, since these data are primarily collected to support health care delivery, clinical coding can be inconsistent, resulting in inherent challenges in using these data for research purposes. Methods: We systematically searched existing international literature and UK code repositories to find respiratory disease codelists for asthma from January 2018, and chronic obstructive pulmonary disease and respiratory tract infections from January 2020, based on prior searches. Medline searches using key terms provided in article lists. Full-text articles, supplementary files, and reference lists were examined for codelists, and codelists repositories were searched. A reproducible methodology for codelists creation was developed with recommended lists for each disease created based on multidisciplinary expert opinion and previously published literature. Results: Medline searches returned 1126 asthma articles, 70 COPD articles, and 90 respiratory infection articles, with 3%, 22% and 5% including codelists, respectively. Repository searching returned 12 asthma, 23 COPD, and 64 respiratory infection codelists. We have systematically compiled respiratory disease codelists and from these derived recommended lists for use by researchers to find the most up-to-date and relevant respiratory disease codelists that can be tailored to individual research questions. Conclusion: Few published papers include codelists, and where published diverse codelists were used, even when answering similar research questions. Whilst some advances have been made, greater consistency and transparency across studies using routine data to study respiratory diseases are needed. [ABSTRACT FROM AUTHOR]
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- 2022
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23. Attenuating ischemia-reperfusion injury with polymerized albumin.
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Belcher, Donald A., Williams, Alexander T., Munoz, Carlos J., Muller, Cynthia R., Walser, Cynthia, Palmer, Andre F., and Cabrales, Pedro
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REPERFUSION injury ,BLOOD transfusion ,TISSUE viability ,ALBUMINS ,BLOOD volume - Abstract
Ischemia-reperfusion injury increased vascular permeability, resulting in fluid extravasation from the intravascular compartment into the tissue space. Fluid and small protein extravasation lead to increased interstitial fluid pressure and capillary collapse, impairing capillary exchange. Polymerized human serum albumin (PolyHSA) has an increased molecular weight (MW) compared with unpolymerized human serum albumin (HSA) and can improve intravascular fluid retention and recovery from ischemia-reperfusion injury. To test the hypothesis that polymerization of HSA can improve recovery from ischemia-reperfusion injury, we studied how exchange transfusion of 20% of the blood volume with HSA or PolyHSA immediately before reperfusion can affect local ischemic tissue microhemodynamics, vascular integrity, and tissue viability in a hamster dorsal window chamber model. Microvascular flow and functional capillary density were maintained in animals exchanged with PolyHSA compared with HSA. Likewise, exchange transfusion with PolyHSA preserved vascular permeability measured with extravasation of fluorescently labeled dextran. The intravascular retention time of the exchanged PolyHSA was significantly longer compared with the intravascular retention time of HSA. Lastly, the viability of tissue subjected to ischemia-reperfusion injury increased in animals exchanged with PolyHSA compared with HSA. Therefore maintenance of microvascular perfusion, improvement in vascular integrity, and reduction in tissue damage resulting from reperfusion with PolyHSA suggest that PolyHSA is a promising fluid therapy to improve outcomes of ischemia-reperfusion injury. [ABSTRACT FROM AUTHOR]
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- 2022
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24. Increased hemoglobin affinity for oxygen with GBT1118 improves hypoxia tolerance in sickle cell mice.
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Dufu, Kobina, Williams, Alexander T., Muller, Cynthia R., Walser, Cynthia M., Lucas, Alfredo, Eaker, Allyn M., Alt, Carsten, Cathers, Brian E., Oksenberg, Donna, and Cabrales, Pedro
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HYPOXEMIA , *HEMOGLOBINS , *SICKLE cell anemia , *CARDIAC output , *OXYGEN in the blood - Abstract
Therapeutic agents that increase the Hb affinity for oxygen (O2) could, in theory, lead to decreased O2 release from Hb and impose a hypoxic risk to tissues. In this study, GBT1118, an allosteric modifier of Hb affinity for O2, was used to assess the impact of increasing Hb affinity for O2 on brain tissue oxygenation, blood pressure, heart rate, O2 delivery, and tolerance to hypoxia in Townes transgenic sickle cell disease (SCD) mice. Brain oxygenation and O2 delivery were studied during normoxia and severe hypoxic challenges. Chronic treatment with GBT1118 increased Hb affinity for O2, reducing the PO2 for 50% HbO2 saturation (P50) in SCD mice from 31 mmHg to 18 mmHg. This treatment significantly reduced anemia, increasing hematocrit by 33%, improved cardiac output (CO), and O2 delivery and extraction. Chronically increasing Hb affinity for O2 with GBT1118 preserved cortical O2 tension during normoxia, improved cortical O2 tension during hypoxia, and increased tolerance to severe hypoxia in SCD mice. Independent of hematological changes induced by chronic treatment, a single dose of GBT1118 significantly improved tolerance to hypoxia, highlighting the benefits of increasing Hb affinity for O2 and consequently reducing sickling of RBCs in blood during hypoxia in SCD. [ABSTRACT FROM AUTHOR]
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- 2021
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25. Purification and analysis of a protein cocktail capable of scavenging cell‐free hemoglobin, heme, and iron.
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Pires, Ivan S., Govender, Krianthan, Munoz, Carlos J., Williams, Alexander T., O'Boyle, Quintin T., Savla, Chintan, Cabrales, Pedro, and Palmer, Andre F.
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HEME ,PROTEIN analysis ,ERYTHROCYTES ,HEMOGLOBINS - Abstract
Background: Hemolysis releases toxic cell‐free hemoglobin (Hb), heme, and iron, which overwhelm their natural scavenging mechanisms during acute or chronic hemolytic conditions. This study describes a novel strategy to purify a protein cocktail containing a comprehensive set of scavenger proteins for potential treatment of hemolysis byproducts. Study Design and Methods: Tangential flow filtration was used to purify a protein cocktail from Human Cohn Fraction IV (FIV). A series of in vitro assays were performed to characterize composition and biocompatibility. The in vivo potential for hemolysis byproduct mitigation was assessed in a hamster exchange transfusion model using mechanically hemolyzed blood plasma mixed with the protein cocktail or a control colloid (dextran 70 kDa). Results: A basis of 500 g of FIV yielded 62 ± 9 g of a protein mixture at 170 g/L, which bound to approximately 0.6 mM Hb, 1.2 mM heme, and 1.2 mM iron. This protein cocktail was shown to be biocompatible in vitro with red blood cells and platelets and exhibits nonlinear concentration dependence with respect to viscosity and colloidal osmotic pressure. In vivo assessment of the protein cocktail demonstrated higher iron transport to the liver and spleen and less to the kidney and heart with significantly reduced renal and cardiac inflammation markers and lower kidney and hepatic damage compared to a control colloid. Discussion Taken together, this study provides an effective method for large‐scale production of a protein cocktail suitable for comprehensive reduction of hemolysis‐induced toxicity. [ABSTRACT FROM AUTHOR]
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- 2021
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26. High fat high sucrose diet-induced dyslipidemia in guinea pigs.
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Muller, Cynthia R., Williams, Alexander T., Eaker, Allyn M., Dos Santos, Fernando, Palmer, Andre F., and Cabrales, Pedro
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Easy access to high-calorie and fat-dense fast food has resulted in unhealthy dietary and lifestyle changes worldwide, which affects both developed and developing economies. This predisposes populations to a considerable number of metabolic and inflammatory conditions, such as diabetes, nonalcoholic fatty liver disease (NAFLD), and cardiovascular disease (CVD). Guinea pigs have been proposed as a model to study high-fat diet-induced metabolic disease due to their similar antioxidant metabolism and lipid profile to humans, and their susceptibility to atherosclerosis and endothelial disease. This study aims to evaluate cardiovascular and metabolic disorders induced by high-fat high-sucrose diet (HFHSD) in guinea pigs. Two to three-week-old male guinea pigs were fed a normal diet (ND) or HFHSD for 12 wk. Guinea pigs fed a HFHSD developed glucose intolerance, dyslipidemia, and liver, cardiac, and kidney damage. However, hypertension, dysautonomia, endothelial disease, and obesity were absent in these HFHSD guinea pigs. Taken together, these results show that guinea pigs fed a HFHSD are a nonobese model of metabolic disorders, resulting in important cardiac damage. Moreover, our findings suggest that NAFLD may be an important risk factor for diet-induced CVD. NEW & NOTEWORTHY In this study, we show a new animal model for diet-induced disease metabolic disorders without obesity in guinea pigs. Moreover, results suggest a strong relation between liver disease and increased cardiovascular risks. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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27. Application of negative tissue interstitial pressure improves functional capillary density after hemorrhagic shock in the absence of volume resuscitation.
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Jani, Vinay P., Jani, Vivek P., Munoz, Carlos J., Govender, Krianthan, Williams, Alexander T., and Cabrales, Pedro
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HEMORRHAGIC shock ,NEGATIVE-pressure wound therapy ,CAPILLAROSCOPY ,BLOOD volume ,HYDROSTATIC pressure ,HYPOVOLEMIC anemia - Abstract
Microvascular fluid exchange is primarily dependent on Starling forces and both the active and passive myogenic response of arterioles and post‐capillary venules. Arterioles are classically considered resistance vessels, while venules are considered capacitance vessels with high distensibility and low tonic sympathetic stimulation at rest. However, few studies have investigated the effects of modulating interstitial hydrostatic pressure, particularly in the context of hemorrhagic shock. The objective of this study was to investigate the mechanics of arterioles and functional capillary density (FCD) during application of negative tissue interstitial pressure after 40% total blood volume hemorrhagic shock. In this study, we characterized systemic and microcirculatory hemodynamic parameters, including FCD, in hamsters instrumented with a dorsal window chamber and a custom‐designed negative pressure application device via intravital microscopy. In large arterioles, application of negative pressure after hemorrhagic shock resulted in a 13 ± 11% decrease in flow compared with only a 7 ± 9% decrease in flow after hemorrhagic shock alone after 90 minutes. In post‐capillary venules, however, application of negative pressure after hemorrhagic shock resulted in a 31 ± 4% decrease in flow compared with only an 8 ± 5% decrease in flow after hemorrhagic shock alone after 90 minutes. Normalized FCD was observed to significantly improve after application of negative pressure after hemorrhagic shock (0.66 ± 0.02) compared to hemorrhagic shock without application of negative pressure (0.50 ± 0.04). Our study demonstrates that application of negative pressure acutely improves FCD during hemorrhagic shock, though it does not normalize FCD. These results suggest that by increasing the hydrostatic pressure gradient between the microvasculature and interstitium, microvascular perfusion can be transiently restored in the absence of volume resuscitation. This study has significant clinical implications, particularly in negative pressure wound therapy, and offers an alternative mechanism to improve microvascular perfusion during hypovolemic shock. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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28. Safety profile of high molecular weight polymerized hemoglobins.
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Muller, Cynthia R., Williams, Alexander T., Munoz, Carlos J., Eaker, Allyn M., Breton, Amanda N., Palmer, Andre F., and Cabrales, Pedro
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MOLECULAR weights , *HEMOGLOBINS , *ERYTHROCYTES , *GUINEA pigs , *BLOOD cells - Abstract
Background: Hemoglobin (Hb)‐based oxygen (O2) carriers (HBOCs) are being developed as alternatives to red blood cells and blood when these products are unavailable. Clinical trials of previous HBOC generations revealed side effects, including hypertension and vasoconstriction, that were not observed in preclinical studies. Large molecular weight (MW) polymerized bovine Hb (PolybHb) represents a new class of HBOC with promising results. We evaluated the safety profile of PolybHb after an exchange transfusion (ET) in guinea pigs (GPs). This study compares changes in indices of cardiac, inflammatory, and organ function after ET with high (R‐state) and low (T‐state) O2 affinity PolybHb with high MW. Study Design and Methods: Guinea pigs underwent a 20% ET with PolybHb. To assess the implication of PolybHb ET on the microcirculation, hamsters instrumented with a dorsal window chamber were subjected to a similar volume ET. Results: T and R‐state PolybHb did not induce significant alterations in cardiac function. T‐state PolybHb induced mild vasoconstriction shortly after transfusion, while R‐state did not have acute effects on microvascular tone. Conclusion: Large MW PolybHbs were found to be safe and efficacious in increasing O2 carrying capacity and the O2 affinity of the PolybHb did not affect O2 delivery or extraction by tissues in relevant preclinical models. In conclusion, these results suggest that both T‐state and R‐state PolybHb are safe and do not impair O2 delivery. The results are encouraging and support further evaluation of high MW PolybHbs and their future feasibility compared to allogenic blood in a trauma model. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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29. Control of systemic inflammation through early nitric oxide supplementation with nitric oxide releasing nanoparticles.
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Williams, Alexander T., Muller, Cynthia R., Govender, Krianthan, Navati, Mahantesh S., Friedman, Adam J., Friedman, Joel M., and Cabrales, Pedro
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GLYCOCALYX , *NITRIC oxide , *NANOPARTICLES , *SYSTEMIC inflammatory response syndrome , *CYTOKINE release syndrome , *INFLAMMATION , *HEMODYNAMICS - Abstract
Amelioration of immune overactivity during sepsis is key to restoring hemodynamics, microvascular blood flow, and tissue oxygenation, and in preventing multi-organ dysfunction syndrome. The systemic inflammatory response syndrome that results from sepsis ultimately leads to degradation of the endothelial glycocalyx and subsequently increased vascular leakage. Current fluid resuscitation techniques only transiently improve outcomes in sepsis, and can cause edema. Nitric oxide (NO) treatment for sepsis has shown promise in the past, but implementation is difficult due to the challenges associated with delivery and the transient nature of NO. To address this, we tested the anti-inflammatory efficacy of sustained delivery of exogenous NO using i.v. infused NO releasing nanoparticles (NO-np). The impact of NO-np on microhemodynamics and immune response in a lipopolysaccharide (LPS) induced endotoxemia mouse model was evaluated. NO-np treatment significantly attenuated the pro-inflammatory response by promoting M2 macrophage repolarization, which reduced the presence of pro-inflammatory cytokines in the serum and slowed vascular extravasation. Combined, this resulted in significantly improved microvascular blood flow and 72-h survival of animals treated with NO-np. The results from this study suggest that sustained supplementation of endogenous NO ameliorates and may prevent the morbidities of acute systemic inflammatory conditions. Given that endothelial dysfunction is a common denominator in many acute inflammatory conditions, it is likely that NO enhancement strategies may be useful for the treatment of sepsis and other acute inflammatory insults that trigger severe systemic pro-inflammatory responses and often result in a cytokine storm, as seen in COVID-19. Image 1 • Inflammatory response was reduced with nitric oxide releasing nanoparticles (NO-nps). • Endotoxemia-induced microvascular deficits were alleviated by NO-nps. • NO-nps promoted M2 macrophage repolarization, and reduced M1 macrophage population. • NO-nps could improve outcomes of insults that cause a cytokine storm, like COVID-19. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
30. Rat red blood cell storage lesions in various additive solutions
- Author
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Jani, Vivek P, Yalcin, Ozlem, Williams, Alexander T, Popovsky, Mark A, and Cabrales, Pedro
- Subjects
Erythrocytes ,storage lesions ,Cardiovascular System & Hematology ,Blood Preservation ,Clinical Sciences ,Banked blood ,blood storage ,Animals ,deformability ,blood transfusion ,Rats - Abstract
BACKGROUND: Small rodent models are routinely used to evaluate the safety and efficacy of blood transfusions. Limited comprehensive literature exists about effect of different storage solutions in rat red blood cells (RBCs) characteristics. RBCs undergo time dependent biochemical and biophysical changes during storage known as hypothermic storage lesions (HSLs). OBJECTIVE: This study evaluates the effects of RBC additive solutions (AS) during storage of rat RBCs. METHODS: Blood was leukoreduced and stored as per manufacturer instructions at 4?C up to 42-days. Three solutions, CPDA-1; AS-1; and AS-7 (SOLX), were evaluated. Biochemical parameters measured included extracellular K+, pH, hemolysis, 2,3-diphosphoglycerate (2,3-DPG), oxygen affinity, ATP, and lactate. Mechanical properties measured included RBC deformability, elongation index (EI), RBC membrane shear elastic modulus (SEM), mean corpuscular volume (MCV), viscosity, and aggregability. RESULTS: There were no differences in biochemical or mechanical parameters at baseline or after one week of storage. However, after two weeks, AS-7 preserved biochemical and mechanical properties as compared to CPDA-1 and AS-1. Changes were observed to be significant after 14-days of storage. AS-7 prevented extracellular K+ increase, reduced acidosis, showed lower hemolysis, preserved ATP and 2,3-DPG levels (consequently oxygen affinity), and reduced lactate. AS-7, when compared to CPDA-1 and AS-1, prevented the reduction in RBC deformability and was found to preserve the EI at multiple shear stresses, the membrane SEM, the aggregability and viscosity. DISCUSSION: Rat RBCs stored with AS-7 presented reduced changes in biochemical and mechanical parameters, when compared with rat RBCs stored in CPDA-1 and AS-1, after as early as two weeks of storage.
- Published
- 2017
31. Balance between oxygen transport and blood rheology during resuscitation from hemorrhagic shock with polymerized bovine hemoglobin.
- Author
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Williams, Alexander T., Lucas, Alfredo, Muller, Cynthia R., Bolden-Rush, Crystal, Palmer, Andre F., and Cabrales, Pedro
- Abstract
Alternatives to blood for use in transfusion medicine have been investigated for decades. An ideal alternative should improve oxygen (O
2 )-carrying capacity and O2 delivery and support microvascular blood flow. Previous studies have shown that large-molecular diameter hemoglobin (Hb)-based oxygen carriers (HBOCs) based on polymerized bovine Hb (PolybHb) reduce the toxicity and vasoconstriction of first-generation HBOCs by increasing blood and plasma viscosity and preserving microvascular perfusion. The objective of this study was to examine the impact of PolybHb concentration and therefore O2 -carrying capacity and solution viscosity on resuscitation from hemorrhagic shock in rats. PolybHb was diafiltered on a 500-kDa tangential flow filtration (TFF) module to remove low-molecular weight (MW) PolybHb molecules from the final product. Rats were hemorrhaged and maintained in hypovolemic shock for 30 min before transfusion of PolybHb at 10 g/dL (PHB10), 5 g/dL (PHB5), or 2.5 g/dL (PHB2.5) concentration, to restore blood pressure to 90% of the animal's baseline blood pressure. Resuscitation restored blood pressure and cardiac function in a PolybHb concentration-dependent manner. Parameters indicative of the heart's metabolic activity indicated that the two higher PolybHb concentrations better restored coronary O2 delivery compared with the low concentration evaluated. Markers of organ damage and inflammation were highest for PHB10, whereas PHB5 and PHB2.5 showed similar expression of these markers. These studies indicate that a concentration of ~5 g/dL of PolybHb may be near the optimal concentration to restore cardiac function, preserve organ function, and mitigate the toxicity of PolybHb during resuscitation from hemorrhagic shock. NEW & NOTEWORTHY Large-molecular diameter polymerized bovine hemoglobin avoided vasoconstriction and impairment of cardiac function during resuscitation from hemorrhagic shock that was seen with previous hemoglobin-based O2 carriers by increasing blood viscosity in a concentration-dependent manner. Supplementation of O2 -carrying capacity played a smaller role in maintaining cardiac function than increased blood and plasma viscosity. [ABSTRACT FROM AUTHOR]- Published
- 2020
- Full Text
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32. Polymerized Hemoglobin With Increased Molecular Size Reduces Toxicity in Healthy Guinea Pigs.
- Author
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Williams, Alexander T., Muller, Cynthia R., Eaker, Allyn M., Belcher, Donald A., Bolden-Rush, Crystal, Palmer, Andre F., and Cabrales, Pedro
- Published
- 2020
- Full Text
- View/download PDF
33. TRANSFUSION OF ANAEROBICALLY OR CONVENTIONALLY STORED BLOOD AFTER HEMORRHAGIC SHOCK.
- Author
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Williams, Alexander T., Jani, Vivek P., Nemkov, Travis, Lucas, Alfredo, Tatsuro Yoshida, Dunham, Andrew, D'Alessandro, Angelo, and Cabrales, Pedro
- Published
- 2020
- Full Text
- View/download PDF
34. Increased Hemoglobin Oxygen Affinity With 5-Hydroxymethylfurfural Supports Cardiac Function During Severe Hypoxia.
- Author
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Lucas, Alfredo, Ao-ieong, Eilleen S. Y., Williams, Alexander T., Jani, Vivek P., Muller, Cynthia R., Yalcin, Ozlem, and Cabrales, Pedro
- Subjects
CORONARY circulation ,HEMOGLOBINS ,HYPOXEMIA ,AMADORI compounds ,GOLDEN hamster ,FETAL anoxia - Abstract
Acclimatization to hypoxia or high altitude involves physiological adaptation processes, to influence oxygen (O
2 ) transport and utilization. Several natural products, including aromatic aldehydes and isothiocyanates stabilize the R-state of hemoglobin (Hb), increasing Hb-O2 affinity and Hb-O2 saturation. These products are a counter intuitive therapeutic strategy to increase O2 delivery during hypoxia. 5-Hydroxymethylfurfural (5-HMF) is well known Amadori compound formed during the Maillard reaction (the non-enzymatic browning and caramelization of carbohydrate-containing foods after thermal treatment), with well documented effects in Hb-O2 affinity. This study explores the therapeutic potential of 5-HMF on left ventricular (LV) cardiac function (LVCF) during hypoxia. Anesthetized Golden Syrian hamsters received 5-HMF i.v., at 100 mg/kg and were subjected to stepwise increased hypoxia (15, 10, and 5%) every 30 min. LVCF was assessed using a closed chest method with a miniaturized conductance catheter via continuous LV pressure-volume (PV) measurements. Heart hypoxic areas were studied using pimonidazole staining. 5-HMF improved cardiac indices, including stroke volume (SV), cardiac output (CO), ejection fraction (EF), and stroke work (SW) compared to the vehicle group. At 5% O2 , SV, CO, EF, and SW were increased by 53, 42, 33, and 51% with 5-HMF relative to vehicle. Heart chronotropic activity was not statistically changed, suggesting that differences in LV-CF during hypoxia by 5-HMF were driven by volume dependent effects. Analysis of coronary blood flow and cardiac muscle metabolism suggest no direct pharmacological effects from 5-HMF, therefore these results can be attributed to 5-HMF-dependent increase in Hb-O2 affinity. These studies establish that naturally occurring aromatic aldehydes, such as 5-HMF, produce modification of hemoglobin oxygen affinity with promising therapeutic potential to increase O2 delivery during hypoxic hypoxia. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
35. Pharmacological Increase of Hb-O2 Affinity with a Voxelotor Analog Does Not Decrease Brain Tissue pO2 or Limit O2 Extraction in Brain Tissues of Sickle Cell Mice
- Author
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Dufu, Kobina, Lucas, Alfredo, Muller, Cynthia Rodrigues, Williams, Alexander T, Zhang, Xinchun, Rademacher, Peter, Alt, Carsten, Oksenberg, Donna, and Cabrales, Pedro
- Published
- 2019
- Full Text
- View/download PDF
36. Blood Quality Diagnostic Device Detects Storage Differences Between Donors.
- Author
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Jani, Vivek P., Mailo, Shawn, Athar, Ali, Lucas, Alfredo, Williams, Alexander T., and Cabrales, Pedro
- Abstract
In 2013, nearly 15 million units of banked blood were transfused in the United States of America alone. Blood shortages are expected to increase globally. Donated blood is not equal due to differences in quality and deterioration rate. There are no methods to detect time-dependent biochemical and biophysical changes of red blood cells (RBCs) or the deterioration rate of donated RBCs. Nine randomly selected RBC units collected by the San Diego Blood Bank were examined for interdonor variability over six weeks of storage. In vitro RBC quality was assessed weekly by conventional biochemical tests including free Hb, K+, ATP, P50, 2,3 DPG, lactate, and pH. Deformability was measured via cell filtration. Briefly, the RBC suspension (10% Hct), was forced through a 5.0-μm pore membrane (106 mm2) at various flow rates. No interdonor variability in biochemical or mechanical parameters was observed at baseline. Interdonor variability in biochemical properties (free Hb, K+, ATP, P50, 2,3 DPG, lactate, and pH) was observed after 14 days of storage. However, significant differences from baseline in RBC mechanical properties (i.e., filterability) were observed as early as 7 days into storage at the lowest flow rates and after 28 days of storage at all flow rates. There was a net decrease in filterability over time for all donors, but the rate at which filterability decreased (i.e., deterioration rates) was different when comparing individual donors. Changes in all biochemical parameters were significant different between donors. These data suggest that filterability is more sensitive to changes in blood quality than conventional biochemical parameters. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
- Full Text
- View/download PDF
37. Rat red blood cell storage lesions in various additive solutions.
- Author
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Jani, Vivek P., Yalcin, Ozlem, Williams, Alexander T., Popovsky, Mark A., and Cabrales, Pedro
- Subjects
LABORATORY rats ,ERYTHROCYTES ,BLOOD circulation ,HEMOLYSIS & hemolysins ,PARAMETERS (Statistics) - Abstract
BACKGROUND: Small rodent models are routinely used to evaluate the safety and efficacy of blood transfusions. Limited comprehensive literature exists about effect of different storage solutions in rat red blood cells (RBCs) characteristics. RBCs undergo time dependent biochemical and biophysical changes during storage known as hypothermic storage lesions (HSLs). OBJECTIVE: This study evaluates the effects of RBC additive solutions (AS) during storage of rat RBCs. METHODS: Blood was leukoreduced and stored as per manufacturer instructions at 4°C up to 42-days. Three solutions, CPDA-1; AS-1; and AS-7 (SOLX), were evaluated. Biochemical parameters measured included extracellular K
+ , pH, hemolysis, 2,3-diphosphoglycerate (2,3-DPG), oxygen affinity, ATP, and lactate. Mechanical properties measured included RBC deformability, elongation index (EI), RBC membrane shear elastic modulus (SEM), mean corpuscular volume (MCV), viscosity, and aggregability. RESULTS: There were no differences in biochemical or mechanical parameters at baseline or after one week of storage. However, after two weeks, AS-7 preserved biochemical and mechanical properties as compared to CPDA-1 and AS-1. Changes were observed to be significant after 14-days of storage. AS-7 prevented extracellular K+ increase, reduced acidosis, showed lower hemolysis, preserved ATP and 2,3-DPG levels (consequently oxygen affinity), and reduced lactate. AS-7, when compared to CPDA-1 and AS-1, prevented the reduction in RBC deformability and was found to preserve the EI at multiple shear stresses, the membrane SEM, the aggregability and viscosity. DISCUSSION: Rat RBCs stored with AS-7 presented reduced changes in biochemical and mechanical parameters, when compared with rat RBCs stored in CPDA-1 and AS-1, after as early as two weeks of storage. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
38. New Media and the 'Anchor Baby' Boom.
- Author
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Ignatow, Gabe and Williams, Alexander T.
- Subjects
MASS media & children ,BABY boom generation ,AMERICAN children ,PARENTS ,IMMIGRANTS ,NEWS websites ,NEWS agencies - Abstract
The term 'anchor baby' refers to children born in the U.S. to undocumented migrant parents who are thought to have been conceived in order to improve their parents' chances of attaining citizenship. Though the term is considered racist and dehumanizing by many, it has recently entered into common usage. This study investigates the process by which this has occurred. We test hypotheses derived from theories of mass and new media using multiple data sources and methods of analysis, and find that the main sources of the anchor baby boom are partisan news websites. The findings suggest that new media may be influencing mass media by creating unique and unprecedented opportunities for medium-sized partisan news organizations. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
39. What determines blood viscosity at the highest city in the world?
- Author
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Cabrales, Pedro, Govender, Krianthan, and Williams, Alexander T.
- Subjects
BLOOD viscosity ,GLOBALIZATION ,DYNAMIC viscosity ,ERYTHROCYTE deformability ,HEMORHEOLOGY - Published
- 2020
- Full Text
- View/download PDF
40. Cohort profile: Extended Cohort for E-health, Environment and DNA (EXCEED).
- Author
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John, Catherine, Reeve, Nicola F, Free, Robert C, Williams, Alexander T, Ntalla, Ioanna, Farmaki, Aliki-Eleni, Bethea, Jane, Barton, Linda M, Shrine, Nick, Batini, Chiara, Packer, Richard, Terry, Sarah, Hargadon, Beverley, Wang, Qingning, Melbourne, Carl A, Adams, Emma L, Bee, Catherine E, Harrington, Kyla, Miola, José, and Brunskill, Nigel J
- Subjects
DNA ,ECOLOGY ,EXPERIMENTAL medicine - Published
- 2019
- Full Text
- View/download PDF
41. A first update on mapping the human genetic architecture of COVID-19
- Author
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COVID-19 Host Genetics Initiative, Pathak, GA, Karjalainen, J, Stevens, C, Neale, BM, Daly, M, Ganna, A, Andrews, SJ, Kanai, M, Cordioli, M, Polimanti, R, Harerimana, N, Pirinen, M, Liao, RG, Chwialkowska, K, Trankiem, A, Balaconis, MK, Nguyen, H, Solomonson, M, Veerapen, K, Wolford, B, Roberts, G, Park, D, Ball, CA, Coignet, M, McCurdy, S, Knight, S, Partha, R, Rhead, B, Zhang, M, Berkowitz, N, Gaddis, M, Noto, K, Ruiz, L, Pavlovic, M, Hong, EL, Rand, K, Girshick, A, Guturu, H, Baltzell, AH, Niemi, MEK, Rahmouni, S, Guntz, J, Beguin, Y, Pigazzini, S, Nkambule, L, Georges, M, Moutschen, M, Misset, B, Darcis, G, Guiot, J, Azarzar, S, Gofflot, S, Claassen, S, Malaise, O, Huynen, P, Meuris, C, Thys, M, Jacques, J, Leonard, P, Frippiat, F, Giot, J-B, Sauvage, A-S, Frenckell, CV, Belhaj, Y, Lambermont, B, Nakanishi, T, Morrison, DR, Mooser, V, Richards, JB, Butler-Laporte, G, Forgetta, V, Li, R, Ghosh, B, Laurent, L, Belisle, A, Henry, D, Abdullah, T, Adeleye, O, Mamlouk, N, Kimchi, N, Afrasiabi, Z, Rezk, N, Vulesevic, B, Bouab, M, Guzman, C, Petitjean, L, Tselios, C, Xue, X, Afilalo, J, Afilalo, M, Oliveira, M, Brenner, B, Brassard, N, Durand, M, Schurr, E, Lepage, P, Ragoussis, J, Auld, D, Chassé, M, Kaufmann, DE, Lathrop, GM, Adra, D, Hayward, C, Glessner, JT, Shaw, DM, Campbell, A, Morris, M, Hakonarson, H, Porteous, DJ, Below, J, Richmond, A, Chang, X, Polikowski, H, Lauren, PE, Chen, H-H, Wanying, Z, Fawns-Ritchie, C, North, K, McCormick, JB, Glessner, JR, Gignoux, CR, Wicks, SJ, Crooks, K, Barnes, KC, Daya, M, Shortt, J, Rafaels, N, Chavan, S, Timmers, PRHJ, Wilson, JF, Tenesa, A, Kerr, SM, D’Mellow, K, Shahin, D, El-Sherbiny, YM, von Hohenstaufen, KA, Sobh, A, Eltoukhy, MM, Nkambul, L, Elhadidy, TA, Abd Elghafar, MS, El-Jawhari, JJ, Mohamed, AAS, Elnagdy, MH, Samir, A, Abdel-Aziz, M, Khafaga, WT, El-Lawaty, WM, Torky, MS, El-shanshory, MR, Yassen, AM, Hegazy, MAF, Okasha, K, Eid, MA, Moahmed, HS, Medina-Gomez, C, Ikram, MA, Uitterlinden, AG, Mägi, R, Milani, L, Metspalu, A, Laisk, T, Läll, K, Lepamets, M, Esko, T, Reimann, E, Naaber, P, Laane, E, Pesukova, J, Peterson, P, Kisand, K, Tabri, J, Allos, R, Hensen, K, Starkopf, J, Ringmets, I, Tamm, A, Kallaste, A, Alavere, H, Metsalu, K, Puusepp, M, Batini, C, Tobin, MD, Venn, LD, Lee, PH, Shrine, N, Williams, AT, Guyatt, AL, John, C, Packer, RJ, Ali, A, Free, RC, Wang, X, Wain, LV, Hollox, EJ, Bee, CE, Adams, EL, Palotie, A, Ripatti, S, Ruotsalainen, S, Kristiansson, K, Koskelainen, S, Perola, M, Donner, K, Kivinen, K, Kaunisto, M, Rivolta, C, Bochud, P-Y, Bibert, S, Boillat, N, Nussle, SG, Albrich, W, Quinodoz, M, Kamdar, D, Suh, N, Neofytos, D, Erard, V, Voide, C, Friolet, R, Vollenweider, P, Pagani, JL, Oddo, M, zu Bentrup, FM, Conen, A, Clerc, O, Marchetti, O, Guillet, A, Guyat-Jacques, C, Foucras, S, Rime, M, Chassot, J, Jaquet, M, Viollet, RM, Lannepoudenx, Y, Portopena, L, Bochud, PY, Desgranges, F, Filippidis, P, Guéry, B, Haefliger, D, Kampouri, EE, Manuel, O, Munting, A, Papadimitriou-Olivgeris, M, Regina, J, Rochat-Stettler, L, Suttels, V, Tadini, E, Tschopp, J, Van Singer, M, Viala, B, Boillat-Blanco, N, Brahier, T, Hügli, O, Meuwly, JY, Pantet, O, Gonseth Nussle, S, Bochud, M, D’Acremont, V, Estoppey Younes, S, Albrich, WC, Cerny, A, O’Mahony, L, von Mering, C, Frischknecht, M, Kleger, G-R., Filipovic, M, Kahlert, CR, Wozniak, H, Negro, TR, Pugin, J, Bouras, K, Knapp, C, Egger, T, Perret, A, Montillier, P, di Bartolomeo, C, Barda, B, de Cid, R, Carreras, A, Moreno, V, Kogevinas, M, Galván-Femenía, I, Blay, N, Farré, X, Sumoy, L, Cortés, B, Mercader, JM, Guindo-Martinez, M, Torrents, D, Garcia-Aymerich, J, Castaño-Vinyals, G, Dobaño, C, Gori, M, Renieri, A, Mari, F, Mondelli, MU, Castelli, F, Vaghi, M, Rusconi, S, Montagnani, F, Bargagli, E, Franchi, F, Mazzei, MA, Cantarini, L, Tacconi, D, Feri, M, Scala, R, Spargi, G, Nencioni, C, Bandini, M, Caldarelli, GP, Canaccini, A, Ognibene, A, D’Arminio Monforte, A, Girardis, M, Antinori, A, Francisci, D, Schiaroli, E, Scotton, PG, Panese, S, Scaggiante, R, Monica, MD, Capasso, M, Fiorentino, G, Castori, M, Aucella, F, Biagio, AD, Masucci, L, Valente, S, Mandalà, M, Zucchi, P, Giannattasio, F, Coviello, DA, Mussini, C, Tavecchia, L, Crotti, L, Rizzi, M, Rovere, MTL, Sarzi-Braga, S, Bussotti, M, Ravaglia, S, Artuso, R, Perrella, A, Romani, D, Bergomi, P, Catena, E, Vincenti, A, Ferri, C, Grassi, D, Pessina, G, Tumbarello, M, Pietro, MD, Sabrina, R, Luchi, S, Furini, S, Dei, S, Benetti, E, Picchiotti, N, Sanarico, M, Ceri, S, Pinoli, P, Raimondi, F, Biscarini, F, Stella, A, Zguro, K, Capitani, K, Tanfoni, M, Fallerini, C, Daga, S, Baldassarri, M, Fava, F, Frullanti, E, Valentino, F, Doddato, G, Giliberti, A, Tita, R, Amitrano, S, Bruttini, M, Croci, S, Meloni, I, Mencarelli, MA, Rizzo, CL, Pinto, AM, Beligni, G, Tommasi, A, Sarno, LD, Palmieri, M, Carriero, ML, Alaverdian, D, Busani, S, Bruno, R, Vecchia, M, Belli, MA, Mantovani, S, Ludovisi, S, Quiros-Roldan, E, Antoni, MD, Zanella, I, Siano, M, Emiliozzi, A, Fabbiani, M, Rossetti, B, Bergantini, L, D’Alessandro, M, Cameli, P, Bennett, D, Anedda, F, Marcantonio, S, Scolletta, S, Guerrini, S, Conticini, E, Frediani, B, Spertilli, C, Donati, A, Guidelli, L, Corridi, M, Croci, L, Piacentini, P, Desanctis, E, Cappelli, S, Verzuri, A, Anemoli, V, Pancrazzi, A, Lorubbio, M, Miraglia, FG, Venturelli, S, Cossarizza, A, Vergori, A, Gabrieli, A, Riva, A, Paciosi, F, Andretta, F, Gatti, F, Parisi, SG, Baratti, S, Piscopo, C, Russo, R, Andolfo, I, Iolascon, A, Carella, M, Merla, G, Squeo, GM, Raggi, P, Marciano, C, Perna, R, Bassetti, M, Sanguinetti, M, Giorli, A, Salerni, L, Parravicini, P, Menatti, E, Trotta, T, Coiro, G, Lena, F, Martinelli, E, Mancarella, S, Gabbi, C, Maggiolo, F, Ripamonti, D, Bachetti, T, Suardi, C, Parati, G, Bottà, G, Domenico, PD, Rancan, I, Bianchi, F, Colombo, R, Barbieri, C, Acquilini, D, Andreucci, E, Segala, FV, Tiseo, G, Falcone, M, Lista, M, Poscente, M, Vivo, OD, Petrocelli, P, Guarnaccia, A, Baroni, S, van Heel, DA, Hunt, KA, Trembath, RC, Huang, QQ, Martin, HC, Mason, D, Trivedi, B, Wright, J, Finer, S, Akhtar, S, Anwar, M, Arciero, E, Ashraf, S, Breen, G, Chung, R, Curtis, CJ, Chowdhury, M, Colligan, G, Deloukas, P, Durham, C, Griffiths, C, Hurles, M, Hussain, S, Islam, K, Khan, A, Lavery, C, Lee, SH, Lerner, R, MacArthur, D, MacLaughlin, B, Martin, H, Miah, S, Newman, B, Safa, N, Tahmasebi, F, Griffiths, CJ, Smith, AV, Boughton, AP, Li, KW, LeFaive, J, Annis, A, Niavarani, A, Aliannejad, R, Sharififard, B, Amirsavadkouhi, A, Naderpour, Z, Tadi, HA, Aleagha, AE, Ahmadi, S, Moghaddam, SBM, Adamsara, A, Saeedi, M, Abdollahi, H, Hosseini, A, Chariyavilaskul, P, Jantarabenjakul, W, Hirankarn, N, Chamnanphon, M, Suttichet, TB, Shotelersuk, V, Pongpanich, M, Phokaew, C, Chetruengchai, W, Putchareon, O, Torvorapanit, P, Puthanakit, T, Suchartlikitwong, P, Nilaratanakul, V, Sodsai, P, Brumpton, BM, Hveem, K, Willer, C, Zhou, W, Rogne, T, Solligard, E, Åsvold, BO, Franke, L, Boezen, M, Deelen, P, Claringbould, A, Lopera, E, Warmerdam, R, Vonk, JM, van Blokland, I, Lanting, P, Ori, APS, Feng, Y-CA, Mercader, J, Weiss, ST, Karlson, EW, Smoller, JW, Murphy, SN, Meigs, JB, Woolley, AE, Green, RC, Perez, EF, Zöllner, S, Wang, J, Beck, A, Sloofman, LG, Ascolillo, S, Sebra, RP, Collins, BL, Levy, T, Buxbaum, JD, Sealfon, SC, Jordan, DM, Thompson, RC, Gettler, K, Chaudhary, K, Belbin, GM, Preuss, M, Hoggart, C, Choi, S, Underwood, SJ, Salib, I, Britvan, B, Keller, K, Tang, L, Peruggia, M, Hiester, LL, Niblo, K, Aksentijevich, A, Labkowsky, A, Karp, A, Zlatopolsky, M, Zyndorf, M, Charney, AW, Beckmann, ND, Schadt, EE, Abul-Husn, NS, Cho, JH, Itan, Y, Kenny, EE, Loos, RJF, Nadkarni, GN, Do, R, O’Reilly, P, Huckins, LM, Ferreira, MAR, Abecasis, GR, Leader, JB, Cantor, MN, Justice, AE, Carey, DJ, Chittoor, G, Josyula, NS, Kosmicki, JA, Horowitz, JE, Baras, A, Gass, MC, Yadav, A, Mirshahi, T, Hottenga, JJ, Bartels, M, de geus, EEJC, Nivard, MMG, Verma, A, Ritchie, MD, Rader, D, Li, B, Verma, SS, Lucas, A, Bradford, Y, Abedalthagafi, M, Alaamery, M, Alshareef, A, Sawaji, M, Massadeh, S, AlMalik, A, Alqahtani, S, Baraka, D, Harthi, FA, Alsolm, E, Safieh, LA, Alowayn, AM, Alqubaishi, F, Mutairi, AA, Mangul, S, Almutairi, M, Aljawini, N, Albesher, N, Arabi, YM, Mahmoud, ES, Khattab, AK, Halawani, RT, Alahmadey, ZZ, Albakri, JK, Felemban, WA, Suliman, BA, Hasanato, R, Al-Awdah, L, Alghamdi, J, AlZahrani, D, AlJohani, S, Al-Afghani, H, AlDhawi, N, AlBardis, H, Alkwai, S, Alswailm, M, Almalki, F, Albeladi, M, Almohammed, I, Barhoush, E, Albader, A, Alotaibi, S, Alghamdi, B, Jung, J, fawzy, MS, Alrashed, M, Zeberg, H, Frithiof, R, Hultström, M, Lipcsey, M, Tardif, N, Rooyackers, O, Grip, J, Maricic, T, Helgeland, Ø, Magnus, P, Trogstad, L-IS, Lee, Y, Harris, JR, Mangino, M, Spector, TD, Emma, D, Moutsianas, L, Caulfield, MJ, Scott, RH, Kousathanas, A, Pasko, D, Walker, S, Stuckey, A, Odhams, CA, Rhodes, D, Fowler, T, Rendon, A, Chan, G, Arumugam, P, Karczewski, KJ, Martin, AR, Wilson, DJ, Spencer, CCA, Crook, DW, Wyllie, DH, O’Connell, AM, Atkinson, EG, Tsuo, K, Baya, N, Turley, P, Gupta, R, Walters, RK, Palmer, DS, Sarma, G, Cheng, N, Lu, W, Churchhouse, C, Goldstein, JI, King, D, Seed, C, Daly, MJ, Finucane, H, Bryant, S, Satterstrom, FK, Band, G, Earle, SG, Lin, S-K, Arning, N, Koelling, N, Armstrong, J, Rudkin, JK, Callier, S, Cusick, C, Soranzo, N, Zhao, JH, Danesh, J, Angelantonio, ED, Butterworth, AS, Sun, YV, Huffman, JE, Cho, K, O’Donnell, CJ, Tsao, P, Gaziano, JM, Peloso, G, Ho, Y-L, Smieszek, SP, Polymeropoulos, C, Polymeropoulos, V, Polymeropoulos, MH, Przychodzen, BP, Fernandez-Cadenas, I, Planas, AM, Perez-Tur, J, Llucià-Carol, L, Cullell, N, Muiño, E, Cárcel-Márquez, J, DeDiego, ML, Iglesias, LL, Soriano, A, Rico, V, Agüero, D, Bedini, JL, Lozano, F, Domingo, C, Robles, V, Ruiz-Jaén, F, Márquez, L, Gomez, J, Coto, E, Albaiceta, GM, García-Clemente, M, Dalmau, D, Arranz, MJ, Dietl, B, Serra-Llovich, A, Soler, P, Colobrán, R, Martín-Nalda, A, Martínez, AP, Bernardo, D, Rojo, S, Fiz-López, A, Arribas, E, de la Cal-Sabater, P, Segura, T, González-Villa, E, Serrano-Heras, G, Martí-Fàbregas, J, Jiménez-Xarrié, E, de Felipe Mimbrera, A, Masjuan, J, García-Madrona, S, Domínguez-Mayoral, A, Villalonga, JM, Menéndez-Valladares, P, Chasman, DI, Sesso, HD, Manson, JE, Buring, JE, Ridker, PM, Franco, G, Davis, L, Lee, S, Priest, J, Sankaran, VG, van Heel, D, Biesecker, L, Kerchberger, VE, Baillie, JK, Pathak, Gita A., Karjalainen, Juha, Stevens, Christine, Neale, Benjamin M., Daly, Mark, Ganna, Andrea, Andrews, Shea J., Kanai, Masahiro, Cordioli, Mattia, Polimanti, Renato, Harerimana, Nadia, Pirinen, Matti, Liao, Rachel G., Chwialkowska, Karolina, Trankiem, Amy, Balaconis, Mary K., Nguyen, Huy, Solomonson, Matthew, Veerapen, Kumar, Wolford, Brooke, Roberts, Genevieve, Park, Danny, Ball, Catherine A., Coignet, Marie, McCurdy, Shannon, Knight, Spencer, Partha, Raghavendran, Rhead, Brooke, Zhang, Miao, Berkowitz, Nathan, Gaddis, Michael, Noto, Keith, Ruiz, Luong, Pavlovic, Milo, Hong, Eurie L., Rand, Kristin, Girshick, Ahna, Guturu, Harendra, Baltzell, Asher Haug, Niemi, Mari E. K., Rahmouni, Souad, Guntz, Julien, Beguin, Yve, Pigazzini, Sara, Nkambule, Lindokuhle, Georges, Michel, Moutschen, Michel, Misset, Benoit, Darcis, Gille, Guiot, Julien, Azarzar, Samira, Gofflot, Stéphanie, Claassen, Sabine, Malaise, Olivier, Huynen, Pascale, Meuris, Christelle, Thys, Marie, Jacques, Jessica, Léonard, Philippe, Frippiat, Frederic, Giot, Jean-Baptiste, Sauvage, Anne-Sophie, Frenckell, Christian Von, Belhaj, Yasmine, Lambermont, Bernard, Nakanishi, Tomoko, Morrison, David R., Mooser, Vincent, Richards, J. Brent, Butler-Laporte, Guillaume, Forgetta, Vincenzo, Li, Rui, Ghosh, Biswarup, Laurent, Laetitia, Belisle, Alexandre, Henry, Danielle, Abdullah, Tala, Adeleye, Olumide, Mamlouk, Noor, Kimchi, Nofar, Afrasiabi, Zaman, Rezk, Nardin, Vulesevic, Branka, Bouab, Meriem, Guzman, Charlotte, Petitjean, Loui, Tselios, Chri, Xue, Xiaoqing, Afilalo, Jonathan, Afilalo, Marc, Oliveira, Maureen, Brenner, Bluma, Brassard, Nathalie, Durand, Madeleine, Schurr, Erwin, Lepage, Pierre, Ragoussis, Jianni, Auld, Daniel, Chassé, Michaël, Kaufmann, Daniel E., Lathrop, G. Mark, Adra, Darin, Hayward, Caroline, Glessner, Joseph T., Shaw, Douglas M., Campbell, Archie, Morris, Marcela, Hakonarson, Hakon, Porteous, David J., Below, Jennifer, Richmond, Anne, Chang, Xiao, Polikowski, Hannah, Lauren, Petty E., Chen, Hung-Hsin, Wanying, Zhu, Fawns-Ritchie, Chloe, North, Kari, McCormick, Joseph B., Glessner, Joseph R., Gignoux, Christopher R., Wicks, Stephen J., Crooks, Kristy, Barnes, Kathleen C., Daya, Michelle, Shortt, Jonathan, Rafaels, Nichola, Chavan, Sameer, Timmers, Paul R. H. J., Wilson, James F., Tenesa, Albert, Kerr, Shona M., D’Mellow, Kenton, Shahin, Doaa, El-Sherbiny, Yasser M., von Hohenstaufen, Kathrin Aprile, Sobh, Ali, Eltoukhy, Madonna M., Nkambul, Lindokuhle, Elhadidy, Tamer A., Abd Elghafar, Mohamed S., El-Jawhari, Jehan J., Mohamed, Attia A. S., Elnagdy, Marwa H., Samir, Amr, Abdel-Aziz, Mahmoud, Khafaga, Walid T., El-Lawaty, Walaa M., Torky, Mohamed S., El-shanshory, Mohamed R., Yassen, Amr M., Hegazy, Mohamed A. F., Okasha, Kamal, Eid, Mohammed A., Moahmed, Hanteera S., Medina-Gomez, Carolina, Ikram, M. Arfan, Uitterlinden, Andre G., Mägi, Reedik, Milani, Lili, Metspalu, Andre, Laisk, Triin, Läll, Kristi, Lepamets, Maarja, Esko, Tõnu, Reimann, Ene, Naaber, Paul, Laane, Edward, Pesukova, Jaana, Peterson, Pärt, Kisand, Kai, Tabri, Jekaterina, Allos, Raili, Hensen, Kati, Starkopf, Joel, Ringmets, Inge, Tamm, Anu, Kallaste, Anne, Alavere, Helene, Metsalu, Kristjan, Puusepp, Mairo, Batini, Chiara, Tobin, Martin D., Venn, Laura D., Lee, Paul H., Shrine, Nick, Williams, Alexander T., Guyatt, Anna L., John, Catherine, Packer, Richard J., Ali, Altaf, Free, Robert C., Wang, Xueyang, Wain, Louise V., Hollox, Edward J., Bee, Catherine E., Adams, Emma L., Palotie, Aarno, Ripatti, Samuli, Ruotsalainen, Sanni, Kristiansson, Kati, Koskelainen, Sami, Perola, Marku, Donner, Kati, Kivinen, Katja, Kaunisto, Mari, Rivolta, Carlo, Bochud, Pierre-Yve, Bibert, Stéphanie, Boillat, Noémie, Nussle, Semira Gonseth, Albrich, Werner, Quinodoz, Mathieu, Kamdar, Dhryata, Suh, Noémie, Neofytos, Dionysio, Erard, Véronique, Voide, Cathy, Friolet, R., Vollenweider, P., Pagani, J. L., Oddo, M., zu Bentrup, F. Meyer, Conen, A., Clerc, O., Marchetti, O., Guillet, A., Guyat-Jacques, C., Foucras, S., Rime, M., Chassot, J., Jaquet, M., Viollet, R. Merlet, Lannepoudenx, Y., Portopena, L., Bochud, P. Y., Desgranges, F., Filippidis, P., Guéry, B., Haefliger, D., Kampouri, E. E., Manuel, O., Munting, A., Papadimitriou-Olivgeris, M., Regina, J., Rochat-Stettler, L., Suttels, V., Tadini, E., Tschopp, J., Van Singer, M., Viala, B., Boillat-Blanco, N., Brahier, T., Hügli, O., Meuwly, J. Y., Pantet, O., Gonseth Nussle, S., Bochud, M., D’Acremont, V., Estoppey Younes, S., Albrich, W. C., Suh, N., Cerny, A., O’Mahony, L., von Mering, C., Frischknecht, M., Kleger, G-R., Filipovic, M., Kahlert, C. R., Wozniak, H., Negro, T. Rochat, Pugin, J., Bouras, K., Knapp, C., Egger, T., Perret, A., Montillier, P., di Bartolomeo, C., Barda, B., de Cid, Rafael, Carreras, Anna, Moreno, Victor, Kogevinas, Manoli, Galván-Femenía, Iván, Blay, Natalia, Farré, Xavier, Sumoy, Lauro, Cortés, Beatriz, Mercader, Josep Maria, Guindo-Martinez, Marta, Torrents, David, Garcia-Aymerich, Judith, Castaño-Vinyals, Gemma, Dobaño, Carlota, Gori, Marco, Renieri, Alessandra, Mari, Francesca, Mondelli, Mario Umberto, Castelli, Francesco, Vaghi, Massimo, Rusconi, Stefano, Montagnani, Francesca, Bargagli, Elena, Franchi, Federico, Mazzei, Maria Antonietta, Cantarini, Luca, Tacconi, Danilo, Feri, Marco, Scala, Raffaele, Spargi, Genni, Nencioni, Cesira, Bandini, Maria, Caldarelli, Gian Piero, Canaccini, Anna, Ognibene, Agostino, D’Arminio Monforte, Antonella, Girardis, Massimo, Antinori, Andrea, Francisci, Daniela, Schiaroli, Elisabetta, Scotton, Pier Giorgio, Panese, Sandro, Scaggiante, Renzo, Monica, Matteo Della, Capasso, Mario, Fiorentino, Giuseppe, Castori, Marco, Aucella, Filippo, Biagio, Antonio Di, Masucci, Luca, Valente, Serafina, Mandalà, Marco, Zucchi, Patrizia, Giannattasio, Ferdinando, Coviello, Domenico A., Mussini, Cristina, Tavecchia, Luisa, Crotti, Lia, Rizzi, Marco, Rovere, Maria Teresa La, Sarzi-Braga, Simona, Bussotti, Maurizio, Ravaglia, Sabrina, Artuso, Rosangela, Perrella, Antonio, Romani, Davide, Bergomi, Paola, Catena, Emanuele, Vincenti, Antonella, Ferri, Claudio, Grassi, Davide, Pessina, Gloria, Tumbarello, Mario, Pietro, Massimo Di, Sabrina, Ravaglia, Luchi, Sauro, Furini, Simone, Dei, Simona, Benetti, Elisa, Picchiotti, Nicola, Sanarico, Maurizio, Ceri, Stefano, Pinoli, Pietro, Raimondi, Francesco, Biscarini, Filippo, Stella, Alessandra, Zguro, Kristina, Capitani, Katia, Tanfoni, Marco, Fallerini, Chiara, Daga, Sergio, Baldassarri, Margherita, Fava, Francesca, Frullanti, Elisa, Valentino, Floriana, Doddato, Gabriella, Giliberti, Annarita, Tita, Rossella, Amitrano, Sara, Bruttini, Mirella, Croci, Susanna, Meloni, Ilaria, Mencarelli, Maria Antonietta, Rizzo, Caterina Lo, Pinto, Anna Maria, Beligni, Giada, Tommasi, Andrea, Sarno, Laura Di, Palmieri, Maria, Carriero, Miriam Lucia, Alaverdian, Diana, Busani, Stefano, Bruno, Raffaele, Vecchia, Marco, Belli, Mary Ann, Mantovani, Stefania, Ludovisi, Serena, Quiros-Roldan, Eugenia, Antoni, Melania Degli, Zanella, Isabella, Siano, Matteo, Emiliozzi, Arianna, Fabbiani, Massimiliano, Rossetti, Barbara, Bergantini, Laura, D’Alessandro, Miriana, Cameli, Paolo, Bennett, David, Anedda, Federico, Marcantonio, Simona, Scolletta, Sabino, Guerrini, Susanna, Conticini, Edoardo, Frediani, Bruno, Spertilli, Chiara, Donati, Alice, Guidelli, Luca, Corridi, Marta, Croci, Leonardo, Piacentini, Paolo, Desanctis, Elena, Cappelli, Silvia, Verzuri, Agnese, Anemoli, Valentina, Pancrazzi, Alessandro, Lorubbio, Maria, Miraglia, Federica Gaia, Venturelli, Sophie, Cossarizza, Andrea, Vergori, Alessandra, Gabrieli, Arianna, Riva, Agostino, Paciosi, Francesco, Andretta, Francesca, Gatti, Francesca, Parisi, Saverio Giuseppe, Baratti, Stefano, Piscopo, Carmelo, Russo, Roberta, Andolfo, Immacolata, Iolascon, Achille, Carella, Massimo, Merla, Giuseppe, Squeo, Gabriella Maria, Raggi, Pamela, Marciano, Carmen, Perna, Rita, Bassetti, Matteo, Sanguinetti, Maurizio, Giorli, Alessia, Salerni, Lorenzo, Parravicini, Pierpaolo, Menatti, Elisabetta, Trotta, Tullio, Coiro, Gabriella, Lena, Fabio, Martinelli, Enrico, Mancarella, Sandro, Gabbi, Chiara, Maggiolo, Franco, Ripamonti, Diego, Bachetti, Tiziana, Suardi, Claudia, Parati, Gianfranco, Bottà, Giordano, Domenico, Paolo Di, Rancan, Ilaria, Bianchi, Francesco, Colombo, Riccardo, Barbieri, Chiara, Acquilini, Donatella, Andreucci, Elena, Segala, Francesco Vladimiro, Tiseo, Giusy, Falcone, Marco, Lista, Mirjam, Poscente, Monica, Vivo, Oreste De, Petrocelli, Paola, Guarnaccia, Alessandra, Baroni, Silvia, van Heel, David A., Hunt, Karen A., Trembath, Richard C., Huang, Qin Qin, Martin, Hilary C., Mason, Dan, Trivedi, Bhavi, Wright, John, Finer, Sarah, Akhtar, Shaheen, Anwar, Mohammad, Arciero, Elena, Ashraf, Samina, Breen, Gerome, Chung, Raymond, Curtis, Charles J., Chowdhury, Maharun, Colligan, Grainne, Deloukas, Pano, Durham, Ceri, Griffiths, Chri, Hurles, Matt, Hussain, Shapna, Islam, Kamrul, Khan, Ahsan, Khan, Amara, Lavery, Cath, Lee, Sang Hyuck, Lerner, Robin, MacArthur, Daniel, MacLaughlin, Bev, Martin, Hilary, Miah, Shefa, Newman, Bill, Safa, Nishat, Tahmasebi, Farah, Griffiths, Christopher J., Smith, Albert V., Boughton, Andrew P., Li, Kevin W., LeFaive, Jonathon, Annis, Aubrey, Niavarani, Ahmadreza, Aliannejad, Rasoul, Sharififard, Bahareh, Amirsavadkouhi, Ali, Naderpour, Zeinab, Tadi, Hengameh Ansari, Aleagha, Afshar Etemadi, Ahmadi, Saeideh, Moghaddam, Seyed Behrooz Mohseni, Adamsara, Alireza, Saeedi, Morteza, Abdollahi, Hamed, Hosseini, Abdolmajid, Chariyavilaskul, Pajaree, Jantarabenjakul, Watsamon, Hirankarn, Nattiya, Chamnanphon, Monpat, Suttichet, Thitima B., Shotelersuk, Vorasuk, Pongpanich, Monnat, Phokaew, Chureerat, Chetruengchai, Wanna, Putchareon, Opa, Torvorapanit, Pattama, Puthanakit, Thanyawee, Suchartlikitwong, Pintip, Nilaratanakul, Voraphoj, Sodsai, Pimpayao, Brumpton, Ben M., Hveem, Kristian, Willer, Cristen, Zhou, Wei, Rogne, Tormod, Solligard, Erik, Åsvold, Bjørn Olav, Franke, Lude, Boezen, Marike, Deelen, Patrick, Claringbould, Annique, Lopera, Esteban, Warmerdam, Robert, Vonk, Judith. M., van Blokland, Irene, Lanting, Pauline, Ori, Anil P. S., Feng, Yen-Chen Anne, Mercader, Josep, Weiss, Scott T., Karlson, Elizabeth W., Smoller, Jordan W., Murphy, Shawn N., Meigs, James B., Woolley, Ann E., Green, Robert C., Perez, Emma F., Zöllner, Sebastian, Wang, Jiongming, Beck, Andrew, Sloofman, Laura G., Ascolillo, Steven, Sebra, Robert P., Collins, Brett L., Levy, Te, Buxbaum, Joseph D., Sealfon, Stuart C., Jordan, Daniel M., Thompson, Ryan C., Gettler, Kyle, Chaudhary, Kumardeep, Belbin, Gillian M., Preuss, Michael, Hoggart, Clive, Choi, Sam, Underwood, Slayton J., Salib, Irene, Britvan, Bari, Keller, Katherine, Tang, Lara, Peruggia, Michael, Hiester, Liam L., Niblo, Kristi, Aksentijevich, Alexandra, Labkowsky, Alexander, Karp, Avromie, Zlatopolsky, Menachem, Zyndorf, Marissa, Charney, Alexander W., Beckmann, Noam D., Schadt, Eric E., Abul-Husn, Noura S., Cho, Judy H., Itan, Yuval, Kenny, Eimear E., Loos, Ruth J. F., Nadkarni, Girish N., Do, Ron, O’Reilly, Paul, Huckins, Laura M., Ferreira, Manuel A. R., Abecasis, Goncalo R., Leader, Joseph B., Cantor, Michael N., Justice, Anne E., Carey, Dave J., Chittoor, Geetha, Josyula, Navya Shilpa, Kosmicki, Jack A., Horowitz, Julie E., Baras, Ari, Gass, Matthew C., Yadav, Ashish, Mirshahi, Tooraj, Hottenga, Jouke Jan, Bartels, Meike, de geus, Eco E. J. C., Nivard, Michel M. G., Verma, Anurag, Ritchie, Marylyn D., Rader, Daniel, Li, Binglan, Verma, Shefali S., Lucas, Anastasia, Bradford, Yuki, Abedalthagafi, Malak, Alaamery, Manal, Alshareef, Abdulraheem, Sawaji, Mona, Massadeh, Salam, AlMalik, Abdulaziz, Alqahtani, Saleh, Baraka, Dona, Harthi, Fawz Al, Alsolm, Ebtehal, Safieh, Leen Abu, Alowayn, Albandary M., Alqubaishi, Fatimah, Mutairi, Amal Al, Mangul, Serghei, Almutairi, Mansour, Aljawini, Nora, Albesher, Nour, Arabi, Yaseen M., Mahmoud, Ebrahim S., Khattab, Amin K., Halawani, Roaa T., Alahmadey, Ziab Z., Albakri, Jehad K., Felemban, Walaa A., Suliman, Bandar A., Hasanato, Rana, Al-Awdah, Laila, Alghamdi, Jahad, AlZahrani, Deema, AlJohani, Sameera, Al-Afghani, Hani, AlDhawi, Nouf, AlBardis, Hadeel, Alkwai, Sarah, Alswailm, Moneera, Almalki, Faisal, Albeladi, Maha, Almohammed, Iman, Barhoush, Eman, Albader, Anoud, Alotaibi, Sara, Alghamdi, Bader, Jung, Junghyun, fawzy, Mohammad S., Alrashed, May, Zeberg, Hugo, Nkambul, Lindo, Frithiof, Robert, Hultström, Michael, Lipcsey, Miklo, Tardif, Nicola, Rooyackers, Olav, Grip, Jonathan, Maricic, Tomislav, Helgeland, Øyvind, Magnus, Per, Trogstad, Lill-Iren S., Lee, Yunsung, Harris, Jennifer R., Mangino, Massimo, Spector, Tim D., Emma, Duncan, Moutsianas, Louka, Caulfield, Mark J., Scott, Richard H., Kousathanas, Athanasio, Pasko, Dorota, Walker, Susan, Stuckey, Alex, Odhams, Christopher A., Rhodes, Daniel, Fowler, Tom, Rendon, Augusto, Chan, Georgia, Arumugam, Prabhu, Karczewski, Konrad J., Martin, Alicia R., Wilson, Daniel J., Spencer, Chris C. A., Crook, Derrick W., Wyllie, David H., O’Connell, Anne Marie, Atkinson, Elizabeth G., Tsuo, Kristin, Baya, Nikola, Turley, Patrick, Gupta, Rahul, Walters, Raymond K., Palmer, Duncan S., Sarma, Gopal, Cheng, Nathan, Lu, Wenhan, Churchhouse, Claire, Goldstein, Jacqueline I., King, Daniel, Seed, Cotton, Daly, Mark J., Finucane, Hilary, Bryant, Sam, Satterstrom, F. Kyle, Band, Gavin, Earle, Sarah G., Lin, Shang-Kuan, Arning, Nicola, Koelling, Nil, Armstrong, Jacob, Rudkin, Justine K., Callier, Shawneequa, Cusick, Caroline, Soranzo, Nicole, Zhao, Jing Hua, Danesh, John, Angelantonio, Emanuele Di, Butterworth, Adam S., Sun, Yan V., Huffman, Jennifer E., Cho, Kelly, O’Donnell, Christopher J., Tsao, Phil, Gaziano, J. Michael, Peloso, Gina, Ho, Yuk-Lam, Smieszek, Sandra P., Polymeropoulos, Christo, Polymeropoulos, Vasilio, Polymeropoulos, Mihael H., Przychodzen, Bartlomiej P., Fernandez-Cadenas, Israel, Planas, Anna M., Perez-Tur, Jordi, Llucià-Carol, Laia, Cullell, Natalia, Muiño, Elena, Cárcel-Márquez, Jara, DeDiego, Marta L., Iglesias, Lara Lloret, Soriano, Alex, Rico, Veronica, Agüero, Daiana, Bedini, Josep L., Lozano, Francisco, Domingo, Carlo, Robles, Veronica, Ruiz-Jaén, Francisca, Márquez, Leonardo, Gomez, Juan, Coto, Eliecer, Albaiceta, Guillermo M., García-Clemente, Marta, Dalmau, David, Arranz, Maria J., Dietl, Beatriz, Serra-Llovich, Alex, Soler, Pere, Colobrán, Roger, Martín-Nalda, Andrea, Martínez, Alba Parra, Bernardo, David, Rojo, Silvia, Fiz-López, Aida, Arribas, Elisa, de la Cal-Sabater, Paloma, Segura, Tomá, González-Villa, Esther, Serrano-Heras, Gemma, Martí-Fàbregas, Joan, Jiménez-Xarrié, Elena, de Felipe Mimbrera, Alicia, Masjuan, Jaime, García-Madrona, Sebastian, Domínguez-Mayoral, Anna, Villalonga, Joan Montaner, Menéndez-Valladares, Paloma, Chasman, Daniel I., Sesso, Howard D., Manson, JoAnn E., Buring, Julie E., Ridker, Paul M., Franco, Giulianini, Davis, Lea, Lee, Sulggi, Priest, Jame, Sankaran, Vijay G., van Heel, David, Biesecker, Le, Kerchberger, V. Eric, Baillie, J. Kenneth, APH - Personalized Medicine, APH - Health Behaviors & Chronic Diseases, Biological Psychology, APH - Mental Health, AMS - Sports, AMS - Ageing & Vitality, APH - Methodology, Mccurdy, Shannon, Mccormick, Joseph B., Macarthur, Daniel, Maclaughlin, Bev, Lefaive, Jonathon, Almalik, Abdulaziz, Alzahrani, Deema, Aljohani, Sameera, Aldhawi, Nouf, Albardis, Hadeel, Fawzy, Mohammad S., Dediego, Marta L., Stem Cell Aging Leukemia and Lymphoma (SALL), Groningen Institute for Gastro Intestinal Genetics and Immunology (3GI), Life Course Epidemiology (LCE), Groningen Research Institute for Asthma and COPD (GRIAC), University of Zurich, COVID-19 Host Genetics Initiative, Barcelona Supercomputing Center, COVID-19 Genetics Initiative, including authors, Institute for Molecular Medicine Finland, and Data Science Genetic Epidemiology Lab
- Subjects
Informàtica::Aplicacions de la informàtica::Bioinformàtica [Àrees temàtiques de la UPC] ,Quantitative Trait Loci ,MUC5B PROMOTER POLYMORPHISM ,Genome-wide association studies ,COVID-19 (Malaltia) ,UFSP13-7 Evolution in Action: From Genomes to Ecosystems ,COVID-19 (Disease) ,Settore BIO/12 - BIOCHIMICA CLINICA E BIOLOGIA MOLECOLARE CLINICA ,SDG 3 - Good Health and Well-being ,Humans ,genetics ,Genetic variation ,Genomes ,Medicinsk genetik ,1000 Multidisciplinary ,Multidisciplinary ,Chromosome Mapping ,COVID-19 ,Human Genetics ,10124 Institute of Molecular Life Sciences ,covid-19 ,3121 General medicine, internal medicine and other clinical medicine ,570 Life sciences ,biology ,Medical Genetics - Abstract
Matters arising from: Mapping the human genetic architecture of COVID-19 Original Article published on 08 July 2021 https://www.nature.com/articles/s41586-021-03767-x The COVID-19 pandemic continues to pose a major public health threat, especially in countries with low vaccination rates. To better understand the biological underpinnings of SARS-CoV-2 infection and COVID-19 severity, we formed the COVID-19 Host Genetics Initiative1. Here we present a genome-wide association study meta-analysis of up to 125,584 cases and over 2.5 million control individuals across 60 studies from 25 countries, adding 11 genome-wide significant loci compared with those previously identified2. Genes at new loci, including SFTPD, MUC5B and ACE2, reveal compelling insights regarding disease susceptibility and severity. Here we present meta-analyses bringing together 60 studies from 25 countries (Fig. 1 and Supplementary Table 1) for three COVID-19-related phenotypes: (1) individuals critically ill with COVID-19 on the basis of requiring respiratory support in hospital or who died as a consequence of the disease (9,376 cases, of which 3,197 are new in this data release, and 1,776,645 control individuals); (2) individuals with moderate or severe COVID-19 defined as those hospitalized due to symptoms associated with the infection (25,027 cases, 11,386 new and 2,836,272 control individuals); and (3) all cases with reported SARS-CoV-2 infection regardless of symptoms (125,584 cases, 76,022 new and 2,575,347 control individuals). Most studies have reported results before the roll out of the COVID-19 vaccination campaign. An overview of the study design is provided in Supplementary Fig. 1. We found a total of 23 genome-wide significant loci (P
- Published
- 2022
42. Numerical model for the determination of erythrocyte mechanical properties and wall shear stress in vivo from intravital microscopy
- Author
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Alexander T. Williams, Vivek Jani, Ozlem Yalcin, Pedro Cabrales, Daniel Ortiz, Carlos Munoz, Alfredo Lucas, Vinay P. Jani, Yalçın, Özlem (ORCID 0000-0001-5547-6653 & YÖK ID 218440), Jani, Vivek P., Lucas, Alfredo, Jani, Vinay P., Munoz, Carlos, Williams, Alexander T., Ortiz, Daniel, Cabrales, Pedro, and School of Medicine
- Subjects
Materials science ,Capillary action ,Physiology ,plug flow ,Population ,erythrocyte mechanics ,Medical Physiology ,microcirculation ,Bioengineering ,Context (language use) ,030204 cardiovascular system & hematology ,lcsh:Physiology ,capillary ,shear strain ,Shear modulus ,03 medical and health sciences ,0302 clinical medicine ,Physiology (medical) ,intravital microscopy ,Shear stress ,Psychology ,education ,Original Research ,030304 developmental biology ,0303 health sciences ,education.field_of_study ,Plug flow ,lcsh:QP1-981 ,Hematology ,wall shear stress ,Erythrocyte mechanics ,Wall shear stress ,Shear strain ,Capillary ,Microcirculation ,Intravital microscopy ,Finite strain theory ,Biomedical engineering - Abstract
The mechanical properties and deformability of Red Blood Cells (RBCs) are important determinants of blood rheology and microvascular hemodynamics. The objective of this study is to quantify the mechanical properties and wall shear stress experienced by the RBC membrane during capillary plug flow in vivo utilizing high speed video recording from intravital microscopy, biomechanical modeling, and computational methods. Capillaries were imaged in the rat cremaster muscle pre- and post-RBC transfusion of stored RBCs for 2-weeks. RBC membrane contours were extracted utilizing image processing and parametrized. RBC parameterizations were used to determine updated deformation gradient and Lagrangian Green strain tensors for each point along the parametrization and for each frame during plug flow. The updated Lagrangian Green strain and Displacement Gradient tensors were numerically fit to the Navier-Lame equations along the parameterized boundary to determined Lame's constants. Mechanical properties and wall shear stress were determined before and transfusion, were grouped in three populations of erythrocytes: native cells (NC) or circulating cells before transfusion, and two distinct population of cells after transfusion with stored cells (SC1 and SC2). The distinction, between the heterogeneous populations of cells present after the transfusion, SC1 and SC2, was obtained through principle component analysis (PCA) of the mechanical properties along the membrane. Cells with the first two principle components within 3 standard deviations of the mean, were labeled as SC1, and those with the first two principle components greater than 3 standard deviations from the mean were labeled as SC2. The calculated shear modulus average was 1.1 +/- 0.2, 0.90 +/- 0.15, and 12 +/- 8 MPa for NC, SC1, and SC2, respectively. The calculated young's modulus average was 3.3 +/- 0.6, 2.6 +/- 0.4, and 32 +/- 20 MPa for NC, SC1, and SC2, respectively. o our knowledge, the methods presented here are the first estimation of the erythrocyte mechanical properties and shear stress in vivo during capillary plug flow. In summary, the methods introduced in this study may provide a new avenue of investigation of erythrocyte mechanics in the context of hematologic conditions that adversely affect erythrocyte mechanical properties., Heart Lung and Blood Institute, NIH Grants
- Published
- 2020
43. Increased Hemoglobin Oxygen Affinity With 5-Hydroxymethylfurfural Supports Cardiac Function During Severe Hypoxia
- Author
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Vivek Jani, Ozlem Yalcin, Cynthia R. Muller, Pedro Cabrales, Alexander T. Williams, Alfredo Lucas, Eilleen S. Y. Ao-ieong, Yalçın, Özlem (ORCID 0000-0001-5547-6653 & YÖK ID 218440), Lucas, Alfredo, Ao-ieong, Eilleen S. Y., Williams, Alexander T., Jani, Vivek P., Muller, Cynthia R, Cabrales, Pedro, School of Medicine, and Department of Physiology
- Subjects
Cardiac function curve ,Cardiac output ,Hypoxic hypoxia ,left ventricle ,Physiology ,Medical Physiology ,030204 cardiovascular system & hematology ,Pharmacology ,Cardiovascular ,5-HMF ,lcsh:Physiology ,03 medical and health sciences ,0302 clinical medicine ,Physiology (medical) ,oxygen delivery ,medicine ,Psychology ,conductance catheter ,Lung ,Allosteric effectors ,Cardiac function ,Conductance catheter ,Hemoglobin ,Left ventricle ,Oxygen delivery ,030304 developmental biology ,Original Research ,0303 health sciences ,Ejection fraction ,lcsh:QP1-981 ,Chemistry ,Cardiac muscle ,Stroke volume ,Hematology ,hemoglobin ,medicine.anatomical_structure ,Heart Disease ,Increased hemoglobin oxygen affinity ,cardiac function ,allosteric effectors - Abstract
Acclimatization to hypoxia or high altitude involves physiological adaptation processes, to influence oxygen (O2) transport and utilization. Several natural products, including aromatic aldehydes and isothiocyanates stabilize the R-state of hemoglobin (Hb), increasing Hb-O2 affinity and Hb-O2 saturation. These products are a counter intuitive therapeutic strategy to increase O2 delivery during hypoxia. 5-Hydroxymethylfurfural (5-HMF) is well known Amadori compound formed during the Maillard reaction (the non-enzymatic browning and caramelization of carbohydrate-containing foods after thermal treatment), with well documented effects in Hb-O2 affinity. This study explores the therapeutic potential of 5-HMF on left ventricular (LV) cardiac function (LVCF) during hypoxia. Anesthetized Golden Syrian hamsters received 5-HMF i.v., at 100 mg/kg and were subjected to stepwise increased hypoxia (15, 10, and 5%) every 30 min. LVCF was assessed using a closed chest method with a miniaturized conductance catheter via continuous LV pressure-volume (PV) measurements. Heart hypoxic areas were studied using pimonidazole staining. 5-HMF improved cardiac indices, including stroke volume (SV), cardiac output (CO), ejection fraction (EF), and stroke work (SW) compared to the vehicle group. At 5% O2, SV, CO, EF, and SW were increased by 53, 42, 33, and 51% with 5-HMF relative to vehicle. Heart chronotropic activity was not statistically changed, suggesting that differences in LV-CF during hypoxia by 5-HMF were driven by volume dependent effects. Analysis of coronary blood flow and cardiac muscle metabolism suggest no direct pharmacological effects from 5-HMF, therefore these results can be attributed to 5-HMF-dependent increase in Hb-O2 affinity. These studies establish that naturally occurring aromatic aldehydes, such as 5-HMF, produce modification of hemoglobin oxygen affinity with promising therapeutic potential to increase O2 delivery during hypoxic hypoxia., National Institutes of Health (NIH); Heart Lung and Blood Institute (HLBI)
- Published
- 2019
44. Genome Wide Association Study of Preserved Ratio Impaired Spirometry (PRISm).
- Author
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Higbee DH, Lirio A, Hamilton F, Granell R, Wyss AB, London SJ, Bartz TM, Gharib SA, Cho MH, Wan E, Silverman E, Crapo JD, Lominchar J, Hansen T, Grarup N, Dantoft T, Kårhus L, Linneberg A, O'Connor GT, Dupuis J, Xu H, De Vries MM, Hu X, Rich SS, Barr RG, Manichaikul A, Wijnant SRA, Brusselle GG, Lahouse L, Li X, Hernández Cordero AI, Obeidat M, Sin DD, Harris SE, Redmond P, Taylor AM, Cox SR, Williams AT, Shrine N, John C, Guyatt AL, Hall IP, Smith GD, Tobin MD, and Dodd JW
- Abstract
Background: Preserved Ratio Impaired Spirometry (PRISm) is defined as FEV
1 <80% predicted, FEV1 /FVC ≥0.70. PRISm is associated with respiratory symptoms and co-morbidities. Our objective was to discover novel genetic signals for PRISm and see if they provide insight into the pathogenesis of PRISm and associated co-morbidities., Methods: We undertook a genome-wide association study (GWAS) of PRISm in UK Biobank participants (Stage 1), and selected SNPs reaching genome-wide significance for replication in 13 cohorts (Stage 2). A combined meta-analysis of Stage 1 and Stage 2 was done to determine top SNPs. We used cross-trait Linkage Disequilibrium score regression to estimate genome-wide genetic correlation between PRISM and pulmonary and extra-pulmonary traits. Phenome-wide association studies of top SNPs was performed., Results: 22 signals reached significance in the joint meta-analysis, including four signals novel for lung function. A strong genome-wide genetic correlation (rg ) between PRISm and spirometric COPD (rg =0.62, p-value <0.001) was observed, and genetic correlation with type II diabetes (rg =0.12, p-value 0.007). PheWAS showed that 18 of 22 signals were associated with diabetic traits and 7 with blood pressure traits., Discussion: This is the first GWAS to successfully identify SNPs associated with PRISm. Four of the signals; rs7652391 (nearest gene MECOM ), rs9431040 ( HLX ), rs62018863 ( TMEM114 ) and rs185937162 ( HLA-B ) have not been described in association with lung function before, demonstrating the utility of using different lung function phenotypes in GWAS. Genetic factors associated with PRISm are strongly correlated with risk of both other lung diseases and extra-pulmonary co-morbidity., (Copyright ©The authors 2023.)- Published
- 2023
- Full Text
- View/download PDF
45. Polymerized human hemoglobin increases the effectiveness of cisplatin-based chemotherapy in non-small cell lung cancer.
- Author
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Lucas A, Belcher DA, Munoz C, Williams AT, Palmer AF, and Cabrales P
- Abstract
Cisplatin is a promising therapeutic for the treatment of non-small cell lung cancer (NSCLC). Unfortunately, a significant portion of NSCLC patients relapse due to cisplatin chemoresistance. This chemoresistance is thought to be primarily associated with hypoxia in the tumor microenvironment. Administration of hemoglobin (Hb)-based oxygen (O
2 ) carriers (HBOCs) is a promising strategy to alleviate hypoxia in the tumor, which may make cisplatin more effective. In this study, we administered a high O2 affinity, relaxed state (R-state) polymerized hemoglobin (PolyHb) to three different NSCLC cell lines cultured in vitro and implanted in vivo into healthy mice. The R-state PolyHb administered in this study is unable to deliver O2 unless under severe hypoxia which significantly limits its oxygenation potential. In vitro sensitivity studies indicate that the administration of PolyHb increases the effectiveness of cisplatin under hypoxic conditions. Additional animal studies revealed that co-administration of PolyHb with cisplatin attenuated tumor growth without alleviating hypoxia. Analysis of reactive O2 species production in the presence of hypoxic culture indicates that exogenous ROS production by oxidized PolyHb may the mechanism of chemosensitization. This ROS mechanism, coupled with oxygenation, may be a potential chemosensitizing strategy for use in NSCLC treatment., Competing Interests: CONFLICTS OF INTEREST Authors have no conflicts of interest to declare., (Copyright: © 2020 Lucas et al.)- Published
- 2020
- Full Text
- View/download PDF
46. Apohemoglobin-haptoglobin complexes attenuate the hypertensive response to low-molecular-weight polymerized hemoglobin.
- Author
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Belcher DA, Munoz C, Pires IS, Williams AT, Cabrales P, and Palmer AF
- Subjects
- Animals, Apoproteins, Hemoglobins, Microcirculation, Haptoglobins, Hypertension drug therapy
- Abstract
Polymerized hemoglobin (PolyHb) is a promising hemoglobin (Hb)-based oxygen carrier currently undergoing development as a red blood cell substitute. Unfortunately, commercially developed products are composed of low-molecular-weight (LMW) PolyHb molecules, which extravasate, scavenge nitric oxide, and result in vasoconstriction and hypertension. The naturally occurring Hb-scavenging species haptoglobin (Hp), combined with the purified heme-scavenging species apohemoglobin (apoHb), is a potential candidate to alleviate the pressor effect of PolyHb. This study evaluated the protective activity of administering the apoHb-Hp complex to mitigate the vasoactive response induced by the transfusion of LMW PolyHb. Hp binding to PolyHb was characterized in vitro. The effectiveness of apoHb-Hp administration on reducing the vasoconstriction and pressor effects of PolyHb was assessed by measuring systemic and microcirculatory hemodynamics. Transfusion of LMW PolyHb to vehicle control pretreated animals increased mean arterial pressure while decreasing arteriole diameter and functional capillary density. However, transfusion of LMW PolyHb to apoHb-Hp pretreated animals prevented changes in mean arterial pressure, heart rate, arteriole diameter, blood flow, and functional capillary density relative to before transfusion. These results indicate that the increased size of PolyHb after binding to the apoHb-Hp complex may help compartmentalize PolyHb in the vascular space and thus reduce extravasation, nitric oxide scavenging, and toxicity responsible for vasoconstriction and systemic hypertension., (© 2020 by The American Society of Hematology.)
- Published
- 2020
- Full Text
- View/download PDF
47. Numerical Model for the Determination of Erythrocyte Mechanical Properties and Wall Shear Stress in vivo From Intravital Microscopy.
- Author
-
Jani VP, Lucas A, Jani VP, Munoz C, Williams AT, Ortiz D, Yalcin O, and Cabrales P
- Abstract
The mechanical properties and deformability of Red Blood Cells (RBCs) are important determinants of blood rheology and microvascular hemodynamics. The objective of this study is to quantify the mechanical properties and wall shear stress experienced by the RBC membrane during capillary plug flow in vivo utilizing high speed video recording from intravital microscopy, biomechanical modeling, and computational methods. Capillaries were imaged in the rat cremaster muscle pre- and post-RBC transfusion of stored RBCs for 2-weeks. RBC membrane contours were extracted utilizing image processing and parametrized. RBC parameterizations were used to determine updated deformation gradient and Lagrangian Green strain tensors for each point along the parametrization and for each frame during plug flow. The updated Lagrangian Green strain and Displacement Gradient tensors were numerically fit to the Navier-Lame equations along the parameterized boundary to determined Lame's constants. Mechanical properties and wall shear stress were determined before and transfusion, were grouped in three populations of erythrocytes: native cells (NC) or circulating cells before transfusion, and two distinct population of cells after transfusion with stored cells (SC1 and SC2). The distinction, between the heterogeneous populations of cells present after the transfusion, SC1 and SC2, was obtained through principle component analysis (PCA) of the mechanical properties along the membrane. Cells with the first two principle components within 3 standard deviations of the mean, were labeled as SC1, and those with the first two principle components greater than 3 standard deviations from the mean were labeled as SC2. The calculated shear modulus average was 1.1±0.2, 0.90±0.15, and 12 ± 8 MPa for NC, SC1, and SC2, respectively. The calculated young's modulus average was 3.3±0.6, 2.6±0.4, and 32±20 MPa for NC, SC1, and SC2, respectively. o our knowledge, the methods presented here are the first estimation of the erythrocyte mechanical properties and shear stress in vivo during capillary plug flow. In summary, the methods introduced in this study may provide a new avenue of investigation of erythrocyte mechanics in the context of hematologic conditions that adversely affect erythrocyte mechanical properties., (Copyright © 2020 Jani, Lucas, Jani, Munoz, Williams, Ortiz, Yalcin and Cabrales.)
- Published
- 2020
- Full Text
- View/download PDF
48. Prediction of Recovery From Severe Hemorrhagic Shock Using Logistic Regression.
- Author
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Lucas A, Williams AT, and Cabrales P
- Abstract
This paper implements logistic regression models (LRMs) and feature selection for creating a predictive model for recovery form hemorrhagic shock (HS) with resuscitation using blood in the multiple experimental rat animal protocols. A total of 61 animals were studied across multiple HS experiments, which encompassed two different HS protocols and two resuscitation protocols using blood stored for short periods using five different techniques. Twenty-seven different systemic hemodynamics, cardiac function, and blood gas parameters were measured in each experiment, of which feature selection deemed only 25% of the them as relevant. The reduced feature set was used to train a final logistic regression model. A final test set accuracy is 84% compared to 74% for a baseline classifier using only MAP and HR measurements. Receiver operating characteristics (ROC) curve analysis and Cohens kappa statistics were also used as measures of performance, with the final reduced model outperforming the model, including all parameters. Our results suggest that LRMs trained with a combination of systemic hemodynamics, cardiac function, and blood gas parameters measured at multiple timepoints during HS can successfully classify HS recovery groups. Our results show the predictive ability of traditional and novel hemodynamic and cardiac function features and their combinations, many of which had not previously been taken into consideration, for monitoring HS. Furthermore, we have devised an effective methodology for feature selection and shown ways in which the performance of such predictive models should be assessed in future studies.
- Published
- 2019
- Full Text
- View/download PDF
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