20 results on '"Monica Chung"'
Search Results
2. Genome screening, reporting, and genetic counseling for healthy populations
- Author
-
Selina Casalino, Erika Frangione, Monica Chung, Georgia MacDonald, Sunakshi Chowdhary, Chloe Mighton, Hanna Faghfoury, Yvonne Bombard, Lisa Strug, Trevor J. Pugh, Jared Simpson, Saranya Arnoldo, Navneet Aujla, Erin Bearss, Alexandra Binnie, Bjug Borgundvaag, Howard Chertkow, Marc Clausen, Marc Dagher, Luke Devine, David Di Iorio, Steven Marc Friedman, Chun Yiu Jordan Fung, Anne-Claude Gingras, Lee W. Goneau, Deepanjali Kaushik, Zeeshan Khan, Elisa Lapadula, Tiffany Lu, Tony Mazzulli, Allison McGeer, Shelley L. McLeod, Gregory Morgan, David Richardson, Harpreet Singh, Seth Stern, Ahmed Taher, Iris Wong, Natasha Zarei, Elena Greenfeld, Limin Hao, Matthew Lebo, William Lane, Abdul Noor, Jennifer Taher, and Jordan Lerner-Ellis
- Subjects
Genetics ,Genetics (clinical) - Abstract
Rapid advancements of genome sequencing (GS) technologies have enhanced our understanding of the relationship between genes and human disease. To incorporate genomic information into the practice of medicine, new processes for the analysis, reporting, and communication of GS data are needed. Blood samples were collected from adults with a PCR-confirmed SARS-CoV-2 (COVID-19) diagnosis (target N = 1500). GS was performed. Data were filtered and analyzed using custom pipelines and gene panels. We developed unique patient-facing materials, including an online intake survey, group counseling presentation, and consultation letters in addition to a comprehensive GS report. The final report includes results generated from GS data: (1) monogenic disease risks; (2) carrier status; (3) pharmacogenomic variants; (4) polygenic risk scores for common conditions; (5) HLA genotype; (6) genetic ancestry; (7) blood group; and, (8) COVID-19 viral lineage. Participants complete pre-test genetic counseling and confirm preferences for secondary findings before receiving results. Counseling and referrals are initiated for clinically significant findings. We developed a genetic counseling, reporting, and return of results framework that integrates GS information across multiple areas of human health, presenting possibilities for the clinical application of comprehensive GS data in healthy individuals.
- Published
- 2022
- Full Text
- View/download PDF
3. Genome Reporting for Healthy Populations-Pipeline for Genomic Screening from the GENCOV COVID-19 Study
- Author
-
Erika, Frangione, Monica, Chung, Selina, Casalino, Georgia, MacDonald, Sunakshi, Chowdhary, Chloe, Mighton, Hanna, Faghfoury, Yvonne, Bombard, Lisa, Strug, Trevor, Pugh, Jared, Simpson, Limin, Hao, Matthew, Lebo, William J, Lane, Jennifer, Taher, and Jordan, Lerner-Ellis
- Subjects
Male ,SARS-CoV-2 ,Blood Group Antigens ,COVID-19 ,Computational Biology ,Humans ,Genomics - Abstract
Genome sequencing holds the promise for great public health benefits. It is currently being used in the context of rare disease diagnosis and novel gene identification, but also has the potential to identify genetic disease risk factors in healthy individuals. Genome sequencing technologies are currently being used to identify genetic factors that may influence variability in symptom severity and immune response among patients infected by SARS-CoV-2. The GENCOV study aims to look at the relationship between genetic, serological, and biochemical factors and variability of SARS-CoV-2 symptom severity, and to evaluate the utility of returning genome screening results to study participants. Study participants select which results they wish to receive with a decision aid. Medically actionable information for diagnosis, disease risk estimation, disease prevention, and patient management are provided in a comprehensive genome report. Using a combination of bioinformatics software and custom tools, this article describes a pipeline for the analysis and reporting of genetic results to individuals with COVID-19, including HLA genotyping, large-scale continental ancestry estimation, and pharmacogenomic analysis to determine metabolizer status and drug response. In addition, this pipeline includes reporting of medically actionable conditions from comprehensive gene panels for Cardiology, Neurology, Metabolism, Hereditary Cancer, and Hereditary Kidney, and carrier screening for reproductive planning. Incorporated into the genome report are polygenic risk scores for six diseases-coronary artery disease; atrial fibrillation; type-2 diabetes; and breast, prostate, and colon cancer-as well as blood group genotyping analysis for ABO and Rh blood types and genotyping for other antigens of clinical relevance. The genome report summarizes the findings of these analyses in a way that extensively communicates clinically relevant results to patients and their physicians. © 2022 Wiley Periodicals LLC. Basic Protocol 1: HLA genotyping and disease association Basic Protocol 2: Large-scale continental ancestry estimation Basic Protocol 3: Dosage recommendations for pharmacogenomic gene variants associated with drug response Support Protocol: System setup.
- Published
- 2022
4. Updates on the web-based VIOLIN vaccine database and analysis system.
- Author
-
Yongqun He, Rebecca Racz, Samantha Sayers, Yu Lin, Thomas E. Todd, Junguk Hur, Xinna Li, Mukti Patel, Boyang Zhao, Monica Chung, Joseph Ostrow, Andrew Sylora, Priya Dungarani, Guerlain Ulysse, Kanika Kochhar, Boris Vidri, Kelsey Strait, George W. Jourdian, and Zuoshuang Xiang
- Published
- 2014
- Full Text
- View/download PDF
5. Obstetric outcomes in pregnancies resulting from in vitro fertilization are not different in fertile, sterilized women compared to infertile women: A Society for Assisted Reproductive Technology database analysis
- Author
-
R.S. Weinerman, Elizabeth A. Dilday, Kevin J. Doody, Monica Chung, Samir N. Babayev, Elizabeth A. DeVilbiss, and Valerie R. Libby
- Subjects
Adult ,Data Analysis ,Infertility ,medicine.medical_specialty ,Adolescent ,Databases, Factual ,Reproductive Techniques, Assisted ,medicine.medical_treatment ,Fertilization in Vitro ,Birth rate ,Cohort Studies ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,030225 pediatrics ,medicine ,Humans ,Societies, Medical ,Retrospective Studies ,Tubal ligation ,030219 obstetrics & reproductive medicine ,In vitro fertilisation ,Assisted reproductive technology ,business.industry ,Obstetrics ,Sterilization, Reproductive ,Pregnancy Outcome ,Obstetrics and Gynecology ,Retrospective cohort study ,Middle Aged ,medicine.disease ,Low birth weight ,Reproductive Medicine ,Gestation ,Female ,medicine.symptom ,business ,Infertility, Female - Abstract
Objective To compare obstetric and neonatal outcomes resulting from assisted reproductive technology in couples with a history of female sterilization to couples with other infertility diagnoses. Design Retrospective cohort study. Setting Not applicable. Patient(s) Fresh, nondonor cycles excluding gestational surrogacy from 2004 to 2013 in the United States. Intervention(s) None. Main Outcome Measure(s) Preterm birth rates and low birth weight rates from in vitro fertilization (IVF) pregnancies in couples with infertility and in couples with prior tubal ligation as their sole indication for IVF. Result(s) The mean ages of fertile women (N = 8,478) and infertile women (N = 371,488) were 35.3 and 34.6 years, respectively. Of the singletons born to parous women (N = 26,463), the incidence of preterm birth was not significantly different in fertile, sterilized couples compared to infertile couples (13.7% vs. 12.0%). The incidence of low birth weight among term singletons was also not significantly different between fertile couples compared to infertile couples (3.5% vs. 3.2%). Conclusion(s) Fertile couples have similar preterm birth and low birth weight rates after IVF compared to infertile couples. This suggests that differences in perinatal outcomes may be due to assisted reproductive technology procedures rather than infertility itself.
- Published
- 2021
- Full Text
- View/download PDF
6. Genome Screening, Reporting and Counseling for Healthy Populations
- Author
-
Selina Casalino, Erika Frangione, Monica Chung, Georgia MacDonald, Sunakshi Chowdhary, Chloe Mighton, Hanna Faghfoury, Yvonne Bombard, Lisa Strug, Trevor Pugh, Jared Simpson, Elena Greenfeld, Limin Hao, Matthew Lebo, William Lane, Abdul Noor, Jennifer Taher, Jordan Lerner-Ellis, and Study Workgroup GENCOV
- Abstract
Introduction: Rapid advancements of genome sequencing (GS) technologies have enhanced our understanding of the relationship between genes and human disease. In order to incorporate genomic information into the practice of medicine, new processes for the analysis, reporting and communication of GS data are needed. Methods: blood samples were collected from adults with a PCR-confirmed SARS-CoV-2 (COVID-19) diagnosis (target N=1500). GS was performed. Data was filtered and analyzed using custom pipelines and gene panels. We developed unique patient-facing materials, including an online intake survey, group counseling presentation, and consultation letters in addition to a comprehensive GS report. Results: The final report includes results generated from GS data: 1) Monogenic disease risks; 2) Carrier status; 3) Pharmacogenomic variants; 4) Polygenic risk scores for common conditions; 5) HLA genotype; 6) Genetic ancestry; 7) Blood group; and, 8) COVID-19 viral lineage. Participants complete pre-test genetic counseling and confirm preferences for secondary findings before receiving results. Counseling and referrals are initiated for clinically significant findings. Conclusion: We developed a genetic counseling, reporting, and return of results framework that integrates GS information across multiple areas of human health, presenting possibilities for the clinical application of comprehensive GS data in healthy individuals.
- Published
- 2022
- Full Text
- View/download PDF
7. EXPLORING THE ROLE OF CONNECTIVE TISSUE GROWTH FACTOR (CTGF) IN THE ANGIOGENESIS OF ENDOMETRIOSIS
- Author
-
Monica Chung, William Gibbons, Xiaoming Guan, and Sang Jun Han
- Subjects
Reproductive Medicine ,Obstetrics and Gynecology - Published
- 2022
- Full Text
- View/download PDF
8. eP325: Medically actionable DNA variation from the GENCOV COVID-19 Genome Sequencing Study
- Author
-
Erika Frangione, Monica Chung, Chloe Mighton, Selina Casalino, Sunakshi Chowdhary, Harpreet Kaur Satnam Singh, Linda Xu, David Di Iorio, Anjali Jain, Ayesha Kidwai, Queenie Wong, Navneet Aujla, Janice Min Li, Manal Quraishi, Greg Morgan, Marc Clausen, Chun Yiu Jordan Fung, Georgia MacDonald, Elisa Lapadula, Saranya Arnoldo, Erin Bearss, Alexandra Binnie, Bjug Borgundvaag, Howard Chertkow, Luke Devine, Steven Marc Friedmen, Anne-Claude Gingras, Zeeshan Khan, Tony Mazzulli, Allison McGeer, Shelley McLeod, Trevor Pugh, David Richardson, Jared Simpson, Seth Stern, Lisa Strug, Ahmed Taher, Iris Wong, Natasha Zarei, Deepanjali Kaushik, Lee Goneau, Marc Dagher, Elena Greenfeld, Hanna Faghfoury, Yvonne Bombard, Abdul Noor, Jennifer Taher, and Jordan Lerner-Ellis
- Subjects
Genetics (clinical) - Published
- 2022
- Full Text
- View/download PDF
9. eP294: Return of genome sequencing results in ostensibly healthy COVID-19 positive individuals: GENCOV Study Canada
- Author
-
Selina Casalino, Chloe Mighton, Marc Clausen, Erika Frangione, Sunakshi Chowdhary, Monica Chung, Chun Yiu Jordan Fung, Greg Morgan, Georgia MacDonald, Elisa Lapadula, Hanna Faghfoury, Saranya Arnoldo, Erin Bearss, Alexandra Binnie, Bjug Borgundvaag, Howard Chertkow, Luke Devine, Steven Marc Friedmen, Anne-Claude Gingras, Zeeshan Khan, Tony Mazzulli, Allison McGeer, Shelley McLeod, Trevor Pugh, David Richardson, Jared Simpson, Seth Stern, Lisa Strug, Ahmed Taher, Iris Wong, Natasha Zarei, Deepanjali Kaushik, Lee Goneau, Marc Dagher, Abdul Noor, Elena Greenfeld, Yvonne Bombard, Jennifer Taher, and Jordan Lerner-Ellis
- Subjects
Genetics (clinical) - Published
- 2022
- Full Text
- View/download PDF
10. Decision-making in older people with dementia
- Author
-
Viloria Jimenez, M. Aurora, Jaén, Monica Chung, García, Marta Vigara, and Barahona-Alvarez, Helena
- Published
- 2013
11. Are outcomes of assisted reproductive technology (ART) treatments performed in couples with history of female sterilization similar to results for couples with other causes of infertility?
- Author
-
Chul Ahn, Samir N. Babayev, Elizabeth A. Dilday, Monica Chung, Valerie Libby, Ang Gao, and Kevin J. Doody
- Subjects
Infertility ,medicine.medical_specialty ,Assisted reproductive technology ,Reproductive Medicine ,business.industry ,Obstetrics ,medicine.medical_treatment ,Female sterilization ,Obstetrics and Gynecology ,Medicine ,business ,medicine.disease - Published
- 2018
- Full Text
- View/download PDF
12. Reliability of preoperative breast biopsies showing ductal carcinoma in situ and implications for non-operative treatment: a cohort study
- Author
-
Ires Joore, Gurdeep S. Mannu, Jelle Wesseling, Flora E. van Leeuwen, Michael Schaapveld, Zhe Wang, Esther H. Lips, Monica Chung, Sarah C. Darby, Emma J. Groen, H.J. Teertstra, and Gonneke A. O. Winter-Warnars
- Subjects
0301 basic medicine ,Cancer Research ,Epidemiology ,Biopsy ,law.invention ,Cohort Studies ,0302 clinical medicine ,Breast cancer ,Randomized controlled trial ,law ,Registries ,skin and connective tissue diseases ,Netherlands ,Randomized Controlled Trials as Topic ,Upstaging ,medicine.diagnostic_test ,Disease Management ,Middle Aged ,Combined Modality Therapy ,3. Good health ,Upgrading ,Oncology ,030220 oncology & carcinogenesis ,Female ,Radiology ,Cohort study ,Adult ,medicine.medical_specialty ,DCIS ,Breast Neoplasms ,03 medical and health sciences ,Young Adult ,Preoperative Care ,medicine ,Mammography ,Humans ,Grading (tumors) ,Aged ,business.industry ,Ductal carcinoma in situ ,Ductal carcinoma ,medicine.disease ,Confidence interval ,body regions ,030104 developmental biology ,Carcinoma, Intraductal, Noninfiltrating ,Neoplasm Grading ,business - Abstract
Purpose The future of non-operative management of DCIS relies on distinguishing lesions requiring treatment from those needing only active surveillance. More accurate preoperative staging and grading of DCIS would be helpful. We identified determinants of upstaging preoperative breast biopsies showing ductal carcinoma in situ (DCIS) to invasive breast cancer (IBC), or of upgrading them to higher-grade DCIS, following examination of the surgically excised specimen. Methods We studied all women with DCIS at preoperative biopsy in a large specialist cancer centre during 2000–2014. Information from clinical records, mammography, and pathology specimens from both preoperative biopsy and excised specimen were abstracted. Women suspected of having IBC during biopsy were excluded. Results Among 606 preoperative biopsies showing DCIS, 15.0% (95% confidence interval 12.3–18.1) were upstaged to IBC and a further 14.6% (11.3–18.4) upgraded to higher-grade DCIS. The risk of upstaging increased with presence of a palpable lump (21.1% vs 13.0%, pdifference = 0.04), while the risk of upgrading increased with presence of necrosis on biopsy (33.0% vs 9.5%, pdifference
- Published
- 2019
13. Delayed surgery in hip fracture patients. Can we afford it?
- Author
-
Monica Chung, Marta García-Salmones, Pilar Cabezas, Elena Romero, Jesús Mora, and Patricia Alonso-Fernández
- Subjects
030222 orthopedics ,medicine.medical_specialty ,Hip fracture ,Barthel index ,business.industry ,Health Policy ,Surgical delay ,Mean age ,medicine.disease ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Orthopedic surgery ,Delayed surgery ,Time to surgery ,medicine ,Functional status ,030212 general & internal medicine ,business - Abstract
The aim is to analyze whether time to surgery (TtoS) in hip fracture patients is associated with longer than expected length of stay (LofS) and whether there is any particular group in which this is especially relevant. We developed an observational study in Madrid, Spain. From 771 patients admitted to the orthopedic ward, we selected 723 with surgical delay ≤7 days. Age was characterized as younger ( 90). Modified Barthel Index was classified as very dependent ( 80). Results: Median (IQR) TtoS was 3 (1–4) days; LofS 12 (7–15). Mean age was 84.3 years, 78.4% were women. TtoS was associated with LofS, which increased by 1.80 days (95% CI, 1.50–2.10) per delayed day (p
- Published
- 2016
- Full Text
- View/download PDF
14. Comparing bhcg values and pregnancy outcomes in intravaginal culture (IVC) to traditional in vitro incubation
- Author
-
Kevin J. Doody, Donald D. McIntire, and Monica Chung
- Subjects
Andrology ,Reproductive Medicine ,business.industry ,Obstetrics and Gynecology ,Medicine ,In vitro incubation ,business ,Pregnancy outcomes - Published
- 2019
- Full Text
- View/download PDF
15. Updates on the web-based VIOLIN vaccine database and analysis system
- Author
-
Priya Dungarani, Kanika Kochhar, Boyang Zhao, Samantha Sayers, Rebecca Racz, Xinna Li, Joseph Ostrow, Thomas E. Todd, Boris Vidri, Andrew Sylora, Yongqun He, Junguk Hur, Kelsey Strait, George W. Jourdian, Mukti Patel, Zuoshuang Xiang, Yu Lin, Monica Chung, and Guerlain Ulysse
- Subjects
Vaccine research ,Virulence Factors ,Ontology (information science) ,Biology ,computer.software_genre ,Vaccines, Attenuated ,DNA vaccination ,World Wide Web ,Violin ,Vaccine adjuvant ,Adjuvants, Immunologic ,Databases, Genetic ,Genetics ,Vaccines, DNA ,Data Mining ,Humans ,Antigens ,Research data ,Internet ,Vaccines ,Attenuated vaccine ,Database ,Reverse vaccinology ,Proteins ,Genomics ,3. Good health ,Systems Integration ,VI. Genomic variation, diseases and drugs ,Genes ,computer ,Sequence Alignment ,Software ,Plasmids - Abstract
The integrative Vaccine Investigation and Online Information Network (VIOLIN) vaccine research database and analysis system (http://www.violinet.org) curates, stores, analyses and integrates various vaccine-associated research data. Since its first publication in NAR in 2008, significant updates have been made. Starting from 211 vaccines annotated at the end of 2007, VIOLIN now includes over 3240 vaccines for 192 infectious diseases and eight noninfectious diseases (e.g. cancers and allergies). Under the umbrella of VIOLIN, >10 relatively independent programs are developed. For example, Protegen stores over 800 protective antigens experimentally proven valid for vaccine development. VirmugenDB annotated over 200 'virmugens', a term coined by us to represent those virulence factor genes that can be mutated to generate successful live attenuated vaccines. Specific patterns were identified from the genes collected in Protegen and VirmugenDB. VIOLIN also includes Vaxign, the first web-based vaccine candidate prediction program based on reverse vaccinology. VIOLIN collects and analyzes different vaccine components including vaccine adjuvants (Vaxjo) and DNA vaccine plasmids (DNAVaxDB). VIOLIN includes licensed human vaccines (Huvax) and veterinary vaccines (Vevax). The Vaccine Ontology is applied to standardize and integrate various data in VIOLIN. VIOLIN also hosts the Ontology of Vaccine Adverse Events (OVAE) that logically represents adverse events associated with licensed human vaccines.
- Published
- 2013
16. Delayed surgery in hip fracture patients. Can we afford it?
- Author
-
Patricia, Alonso-Fernández, Elena, Romero, Monica, Chung, Marta, García-Salmones, Pilar, Cabezas, and Jesús, Mora
- Subjects
Aged, 80 and over ,Male ,Hip Fractures ,Spain ,Age Factors ,Humans ,Female ,Prospective Studies ,Length of Stay ,Aged ,Time-to-Treatment - Abstract
The aim is to analyze whether time to surgery (TtoS) in hip fracture patients is associated with longer than expected length of stay (LofS) and whether there is any particular group in which this is especially relevant. We developed an observational study in Madrid, Spain. From 771 patients admitted to the orthopedic ward, we selected 723 with surgical delay ≤7 days. Age was characterized as younger (81), elderly (81-90), very elderly (90). Modified Barthel Index was classified as very dependent (41), moderately dependent (41-80), independent (80).Median (IQR) TtoS was 3 (1-4) days; LofS 12 (7-15). Mean age was 84.3 years, 78.4% were women. TtoS was associated with LofS, which increased by 1.80 days (95% CI, 1.50-2.10) per delayed day (p0.001). After adjustment for age, sex, functional status, we found an increase of 1.75 days (1.46-2.04) per day (p0.001). We did not find effect of age or sex. Functional status had a higher effect in moderately dependent patients 2.25 days (1.78-2.72) than in very dependent or independent patients, 1.33 (0.37-2.30) and 1.50 days (1.09-1.91) respectively (p 0.012). As conclusion we could affirm that increasing TtoS leads to longer than expected LofS in hip fracture patients, particularly moderately dependent patients. Copyright © 2016 John WileySons, Ltd.
- Published
- 2015
17. Incidence of an anatomically separate carcinoma of the breast in patients diagnosed with a papillary lesion on breast core biopsy
- Author
-
Nella Shapiro, Susan Fineberg, Monica Chung, and Tova Koenigsberg
- Subjects
Pathology ,medicine.medical_specialty ,Papillary lesion ,MEDLINE ,Breast Neoplasms ,Breast cancer ,Biopsy ,Internal Medicine ,Carcinoma ,medicine ,Humans ,In patient ,Retrospective Studies ,medicine.diagnostic_test ,Papilloma ,business.industry ,Incidence (epidemiology) ,Incidence ,Retrospective cohort study ,Neoplasms, Second Primary ,Middle Aged ,medicine.disease ,Carcinoma, Papillary ,Carcinoma, Intraductal, Noninfiltrating ,Oncology ,Surgery ,Female ,Radiology ,Biopsy, Large-Core Needle ,business - Published
- 2015
18. The Clinical and Genomic Significance of Donor-Specific Antibody–Positive/C4d-Negative and Donor-Specific Antibody–Negative/C4d-Negative Transplant Glomerulopathy
- Author
-
R. Brent Calder, Monica Chung, Enver Akalin, Nicole Hayde, James Pullman, Graciela de Boccardo, Yi Bao, Bin Ye, Daniel Schwartz, Michelle Lubetzky, and Maria Ajaimy
- Subjects
Graft Rejection ,Male ,Pathology ,Time Factors ,Epidemiology ,Biopsy ,Kaplan-Meier Estimate ,Critical Care and Intensive Care Medicine ,Glomerulonephritis ,Isoantibodies ,Risk Factors ,Cytotoxic T cell ,Oligonucleotide Array Sequence Analysis ,Immunity, Cellular ,biology ,medicine.diagnostic_test ,Graft Survival ,Genomics ,Middle Aged ,Allografts ,medicine.anatomical_structure ,Nephrology ,Histocompatibility ,Female ,Antibody ,Adult ,medicine.medical_specialty ,T cell ,Predictive Value of Tests ,medicine ,Complement C4b ,Humans ,Transplantation ,business.industry ,Gene Expression Profiling ,Endothelial Cells ,Transplant glomerulopathy ,Original Articles ,medicine.disease ,Kidney Transplantation ,Peptide Fragments ,Immunity, Humoral ,body regions ,Gene expression profiling ,Gene Expression Regulation ,Microvessels ,biology.protein ,Histopathology ,business ,T-Lymphocytes, Cytotoxic - Abstract
This study investigated the mechanisms involved in development of donor-specific antibody (DSA) and/or C4d-negative transplant glomerulopathy (TGP) by allograft gene expression profiles using microarrays.This cohort study was conducted in kidney transplant recipients. Patients were eligible for inclusion if they required a clinically indicated biopsy at any time point after their transplant. They were then classified according to their histopathology findings and DSA and C4d results. Eighteen chronic antibody-mediated rejection (CAMR), 14 DSA+/C4d- TGP, 25 DSA-/C4d- TGP, and 47 nonspecific interstitial fibrosis/tubular atrophy (IFTA) biopsy specimens were identified. In a subset of patients from the study population, biopsy specimens in each group and normal transplant kidney specimens were analyzed with Affymetrix Human Gene 1.0 ST Arrays.The mean sum score of glomerulitis and peritubular capillaritis increased from 0.28±0.78 in IFTA specimens to 0.75±0.85 in DSA-/C4d- TGP specimens, 1.71±1.49 in DSA+/C4d-/TGP specimens, and 2.11±1.74 in CAMR specimens (P0.001). During a median follow-up time of 2 (interquartile range, 1.4-2.8) years after biopsy, graft loss was highest in CAMR specimens (27.8%) compared to IFTA specimens (8.5%), DSA+/C4d- TGP specimens (14.3%), and DSA-/C4d- TGP specimens (16%) (P=0.01). With use of microarrays, comparison of the gene expression profiles of DSA-/C4d- TGP specimens with glomerulitis + peritubular capillaritis scores0 to normal and IFTA biopsy specimens revealed higher expression of quantitative cytotoxic T cell-associated transcripts (QCAT). However, both CAMR and DSA+/C4d- TGP specimens had higher expression of not only QCAT but also IFN-γ and rejection-induced, constitutive macrophage-associated, natural killer cell-associated, and DSA-selective transcripts. Endothelial cell-associated transcript expression was upregulated only in CAMR biopsy specimens.These results suggested that DSA+/C4d- TGP biopsy specimens may be classified as CAMR. In contrast, DSA-/C4d- TGP specimens showed increased cytotoxic T cell-associated transcripts, suggesting T cell activation as a mechanism of injury.
- Published
- 2013
19. The clinical and molecular significance of C4d staining patterns in renal allografts
- Author
-
Daniel Schwartz, Graciela de Boccardo, Nicole Hayde, James Pullman, Yi Bao, Brent R. Calder, Bin Ye, Min Ling, Ahmed Alansari, Monica Chung, and Enver Akalin
- Subjects
Adult ,Graft Rejection ,Male ,Pathology ,medicine.medical_specialty ,Biopsy ,Kidney Glomerulus ,Kaplan-Meier Estimate ,Kidney ,Pathogenesis ,Immune system ,HLA Antigens ,Isoantibodies ,Gene expression ,Complement C4b ,Odds Ratio ,Medicine ,Cytotoxic T cell ,Humans ,RNA, Messenger ,Oligonucleotide Array Sequence Analysis ,Transplantation ,Chi-Square Distribution ,biology ,business.industry ,Gene Expression Profiling ,Middle Aged ,Molecular biology ,Immunohistochemistry ,Kidney Transplantation ,Peptide Fragments ,Staining ,Capillaries ,Treatment Outcome ,Gene Expression Regulation ,Polyclonal antibodies ,Histocompatibility ,biology.protein ,Female ,Antibody ,business ,Biomarkers - Abstract
BACKGROUND We investigated the clinical and molecular significance of minimal peritubular capillary (PTC) and isolated glomerular C4d+ staining using microarrays. METHODS Two hundred fifty-five clinically indicated transplant biopsies were included in the analyses. C4d staining was performed on paraffin sections using a polyclonal rabbit anti-C4d antibody. Gene expression profiles in a subset of patients were studied using Affymetrix HuGene 1.0ST arrays. RESULTS Immunohistochemistry for C4d of 255 biopsies showed 51% C4d negative, 4% minimal PTC C4d+, 15% focal or diffuse PTC C4d+, and 31% isolated glomerular C4d+ biopsies. Patients with minimal and focal/diffuse PTC C4d+ staining had higher frequency of donor-specific anti-HLA antibodies (DSA) (67% and 82%) and antibody mediated rejection (AMR) (66% and 89%) when compared with C4d-negative biopsies (25% and 19%, respectively) (P
- Published
- 2013
20. Systematic annotation and analysis of 'virmugens'-virulence factors whose mutants can be used as live attenuated vaccines
- Author
-
Yongqun He, Rebecca Racz, Zuoshuang Xiang, and Monica Chung
- Subjects
Protozoan Vaccines ,Sequence analysis ,Virulence Factors ,Virulence ,Biology ,Vaccines, Attenuated ,Virulence factor ,Article ,Microbiology ,Gene Knockout Techniques ,Databases, Genetic ,Animals ,Humans ,Attenuated vaccine ,General Veterinary ,General Immunology and Microbiology ,Aroa ,Viral Vaccine ,Nucleotide transport ,Public Health, Environmental and Occupational Health ,Computational Biology ,Viral Vaccines ,biology.organism_classification ,Bacterial vaccine ,Infectious Diseases ,Bacterial Vaccines ,Molecular Medicine - Abstract
Live attenuated vaccines are usually generated by mutation of genes encoding virulence factors. “Virmugen” is coined here to represent a gene that encodes for a virulent factor of a pathogen and has been proven feasible in animal models to make a live attenuated vaccine by knocking out this gene. Not all virulence factors are virmugens. VirmugenDB is a web-based virmugen database ( http://www.violinet.org/virmugendb ). Currently, VirmugenDB includes 225 virmugens that have been verified to be valuable for vaccine development against 57 bacterial, viral, and protozoan pathogens. Bioinformatics analysis has revealed significant patterns in virmugens. For example, 10 Gram-negative and 1 Gram-positive bacterial aroA genes are virmugens. A sequence analysis has revealed at least 50% of identities in the protein sequences of the 10 Gram-negative bacterial aroA virmugens. As a pathogen case study, Brucella virmugens were analyzed. Out of 15 verified Brucella virmugens, 6 are related to carbohydrate or nucleotide transport and metabolism, and 2 involving cell membrane biogenesis. In addition, 54 virmugens from 24 viruses and 12 virmugens from 4 parasites are also stored in VirmugenDB. Virmugens tend to involve metabolism of nutrients (e.g., amino acids, carbohydrates, and nucleotides) and cell membrane formation. Host genes whose expressions were regulated by virmugen mutation vaccines or wild type virulent pathogens have also been annotated and systematically compared. The bioinformatics annotation and analysis of virmugens helps to elucidate enriched virmugen profiles and the mechanisms of protective immunity, and further supports rational vaccine design.
- Published
- 2012
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.