8 results on '"Landay, Alan L."'
Search Results
2. Classical monocyte transcriptomes reveal significant anti-inflammatory statin effect in women with chronic HIV.
- Author
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Ehinger E, Ghosheh Y, Pramod AB, Lin J, Hanna DB, Mueller K, Durant CP, Baas L, Qi Q, Wang T, Buscher K, Anastos K, Lazar JM, Mack WJ, Tien PC, Cohen MH, Ofotokun I, Gange S, Heath SL, Hodis HN, Tracy RP, Landay AL, Kaplan RC, and Ley K
- Subjects
- Adult, Cardiovascular Diseases genetics, Cardiovascular Diseases immunology, Cardiovascular Diseases virology, Case-Control Studies, Cytokines genetics, Cytokines metabolism, Female, Gene Expression Profiling, Gene Regulatory Networks, HIV Infections genetics, HIV Infections virology, Heart Disease Risk Factors, Humans, Inflammation genetics, Inflammation immunology, Inflammation virology, Inflammation Mediators metabolism, Longitudinal Studies, Middle Aged, Monocytes immunology, Monocytes metabolism, Monocytes virology, Risk Assessment, Sex Factors, United States, Anti-Inflammatory Agents therapeutic use, Cardiovascular Diseases prevention & control, HIV Infections immunology, HIV Long-Term Survivors, Hydroxymethylglutaryl-CoA Reductase Inhibitors therapeutic use, Inflammation prevention & control, Monocytes drug effects, Transcriptome
- Abstract
Aims: During virally suppressed chronic HIV infection, persistent inflammation contributes to the development of cardiovascular disease (CVD), a major comorbidity in people living with HIV (LWH). Classical blood monocytes (CMs) remain activated during antiretroviral therapy and are a major source of pro-inflammatory and pro-thrombotic factors that contribute to atherosclerotic plaque development and instability., Methods and Results: Here, we identify transcriptomic changes in circulating CMs in peripheral blood mononuclear cell samples from participants of the Women's Interagency HIV Study, selected by HIV and subclinical CVD (sCVD) status. We flow-sorted CM from participants of the Women's Interagency HIV Study and deep-sequenced their mRNA (n = 92). CMs of HIV+ participants showed elevated interleukin (IL)-6, IL-1β, and IL-12β, overlapping with many transcripts identified in sCVD+ participants. In sCVD+ participants LWH, those reporting statin use showed reduced pro-inflammatory gene expression to a level comparable with healthy (HIV-sCVD-) participants. Statin non-users maintained an elevated inflammatory profile and increased cytokine production., Conclusion: Statin therapy has been associated with a lower risk of cardiac events, such as myocardial infarction in the general population, but not in those LWH. Our data suggest that women LWH may benefit from statin therapy even in the absence of overt CVD., (Published on behalf of the European Society of Cardiology. All rights reserved. © The Author(s) 2020. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2021
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3. Natural killer cells, gamma delta T cells and classical monocytes are associated with systolic blood pressure in the multi-ethnic study of atherosclerosis (MESA).
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Delaney JAC, Olson NC, Sitlani CM, Fohner AE, Huber SA, Landay AL, Heckbert SR, Tracy RP, Psaty BM, Feinstein M, and Doyle MF
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- Aged, Aged, 80 and over, Case-Control Studies, Female, Humans, Hypertension diagnosis, Hypertension ethnology, Immunophenotyping, Male, Middle Aged, Phenotype, Prognosis, United States epidemiology, Blood Pressure, Hypertension immunology, Hypertension physiopathology, Immunity, Innate, Intraepithelial Lymphocytes immunology, Killer Cells, Natural immunology, Monocytes immunology
- Abstract
Background: Hypertension is a major source of cardiovascular morbidity and mortality. Recent evidence from mouse models, genetic, and cross-sectional human studies suggest increased proportions of selected immune cell subsets may be associated with levels of systolic blood pressure (SBP)., Methods: We assayed immune cells from cryopreserved samples collected at the baseline examination (2000-2002) from 1195 participants from the multi-ethnic study of atherosclerosis (MESA). We used linear mixed models, with adjustment for age, sex, race/ethnicity, smoking, exercise, body mass index, education, diabetes, and cytomegalovirus titers, to estimate the associations between 30 immune cell subsets (4 of which were a priori hypotheses) and repeated measures of SBP (baseline and up to four follow-up measures) over 10 years. The analysis provides estimates of the association with blood pressure level., Results: The mean age of the MESA participants at baseline was 64 ± 10 years and 53% were male. A one standard deviation (1-SD) increment in the proportion of γδ T cells was associated with 2.40 mmHg [95% confidence interval (CI) 1.34-3.42] higher average systolic blood pressure; and for natural killer cells, a 1-SD increment was associated with 1.88 mmHg (95% CI 0.82-2.94) higher average level of systolic blood pressure. A 1-SD increment in classical monocytes (CD14
++ CD16- ) was associated with 2.01 mmHG (95% CI 0.79-3.24) lower average systolic blood pressure. There were no associations of CD4+ T helper cell subsets with average systolic blood pressure., Conclusion: These findings suggest that the innate immune system plays a role in levels of SBP whereas there were no associations with adaptive immune cells.- Published
- 2021
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4. Innate and adaptive immune cell subsets as risk factors for coronary heart disease in two population-based cohorts.
- Author
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Olson NC, Sitlani CM, Doyle MF, Huber SA, Landay AL, Tracy RP, Psaty BM, and Delaney JA
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- Aged, Aged, 80 and over, Case-Control Studies, Coronary Disease blood, Coronary Disease diagnosis, Coronary Disease epidemiology, Cross-Sectional Studies, Female, Flow Cytometry, Heart Disease Risk Factors, Humans, Immunophenotyping, Incidence, Male, Middle Aged, Phenotype, Prospective Studies, Risk Assessment, United States epidemiology, Coronary Disease immunology, Immunity, Cellular, Immunity, Innate, Lymphocytes immunology, Monocytes immunology
- Abstract
Background and Aims: Cell-mediated immunity is implicated in atherosclerosis. We evaluated whether innate and adaptive immune cell subsets in peripheral blood are risk factors for coronary heart disease., Methods: A nested case-cohort study (n = 2155) was performed within the Multi-Ethnic Study of Atherosclerosis (MESA) and the Cardiovascular Health Study (CHS). Cases of incident myocardial infarction (MI) and incident angina (n = 880 total cases) were compared with a cohort random sample (n = 1275). Immune cell phenotypes (n = 34, including CD14
+ monocytes, natural killer cells, γδ T cells, CD4+ , CD8+ and CD19+ lymphocyte subsets) were measured from cryopreserved cells by flow cytometry. Cox proportional hazards models with adjustment for cardiovascular disease risk factors were used to evaluate associations of cell phenotypes with incident MI and a composite phenotype of incident MI or incident angina (MI-angina) over a median 9.3 years of follow-up. Th1, Th2, Th17, T regulatory (CD4+ CD25+ CD127- ), naive (CD4+ CD45RA+ ), memory (CD4+ CD45RO+ ), and CD4+ CD28- cells were specified as primary hypotheses. In secondary analyses, 27 additional cell phenotypes were investigated., Results: After correction for multiple testing, there were no statistically significant associations of CD4+ naive, memory, CD28- , or T helper cell subsets with MI or MI-angina in MESA, CHS, or combined-cohort meta analyses. Null associations were also observed for monocyte subsets, natural killer cells, γδ T cells, CD19+ B cell and differentiated CD4+ and CD8+ cell subsets., Conclusions: The proportions of peripheral blood monocyte and lymphocyte subsets are not strongly related to the future occurrence of MI or angina in adults free of autoimmune disease., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2020
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5. Association of Lipidomic Profiles With Progression of Carotid Artery Atherosclerosis in HIV Infection.
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Chai JC, Deik AA, Hua S, Wang T, Hanna DB, Xue X, Haberlen SA, Shah SJ, Suh Y, Lazar JM, Gustafson D, Hodis HN, Landay AL, Anastos K, Post WS, Kaplan RC, Clish CB, and Qi Q
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- Adult, Anti-Retroviral Agents therapeutic use, Carotid Arteries diagnostic imaging, Disease Progression, Female, HIV Infections drug therapy, Humans, Male, Middle Aged, Plaque, Atherosclerotic diagnostic imaging, Plaque, Atherosclerotic epidemiology, Prospective Studies, Ultrasonography, United States epidemiology, Carotid Artery Diseases epidemiology, HIV Infections epidemiology, Lipids blood
- Abstract
Importance: Lipid metabolism disruption and excess risk of cardiovascular disease (CVD) have been observed in HIV-infected individuals, but the associations among HIV infection, plasma lipidome, and CVD risk have not been well understood., Objective: To evaluate plasma lipidomic profiles and their associations with carotid artery atherosclerosis in individuals with HIV and individuals without HIV., Design, Setting, and Participants: Prospective analysis in the Women's Interagency HIV Study and Multicenter AIDS Cohort Study during a 7-year follow-up (from 2004-2006 to 2011-2013) at multicenter HIV cohorts in the United States. The study included 737 participants aged 35 to 55 years (520 with HIV and 217 without HIV) without CVD or carotid artery plaque at baseline. Data were analyzed between April 2017 and July 2019., Exposures: Two hundred eleven plasma lipid species., Main Outcomes and Measures: Poisson regression was used to examine the associations of baseline lipid species with risk of plaque measured by repeated B-mode carotid artery ultrasonography imaging., Results: Of the 737 included participants, 398 (54%) were women, 351 (48%) were African American (non-Hispanic), 156 of 737 (21%) were nonwhite Hispanic, and the mean (SD) age was 45 (6) years. After adjusting for demographic and behavioral factors, we identified 12 lipid species, representing independent signals for 10 lipid classes, associated with risk of plaque. Nine lipid species remained significant after further adjusting for conventional CVD risk factors, although many of them showed moderate to high association with conventional blood lipids (eg, total and low-density lipoprotein cholesterols and triglycerides). Cholesteryl ester (16:1) (risk ratio [RR] per standard deviation, 1.28; 95% CI, 1.08-1.52), ceramide (16:0) (RR, 1.29; 95% CI, 1.02-1.63), lysophosphatidylcholine (20:4) (RR, 1.28; 95% CI, 1.05-1.58), lysophosphatidylethanolamine (16:0) (RR, 1.28; 95% CI, 1.05-1.57), phosphatidylethanolamine (38:6) (RR, 1.33; 95% CI, 1.08-1.64), phosphatidylethanolamine-plasmalogen (36:2) (RR, 1.25; 95% CI, 1.04-1.52), phosphatidylserine-plasmalogen (36:3) (RR, 1.19; 95% CI, 1.00-1.43), and triacylglycerol (54:6) (RR, 1.26; 95% CI, 1.04-1.54) were associated with increased risk of plaque, while phosphatidylcholine (36:4) (RR, 0.65; 95% CI, 0.54-0.77) was associated with decreased risk of plaque. Most of these plaque-increased lipid species showed higher levels in individuals with HIV, particularly among individuals with HIV using antiretroviral therapy compared with individuals without HIV. Network analysis identified 9 lipid modules, and 2 modules composed of triacylglycerols and phosphatidylcholines with long and unsaturated acyl chains, respectively, showed the strongest associations with increased risk of plaque., Conclusions and Relevance: This study identified multiple plasma lipid species associated with carotid artery atherosclerosis, and alterations in these lipid species might be associated with HIV infection and antiretroviral therapy. Our data suggest unfavorable associations of long-chain and unsaturated triacylglycerols and phosphatidylcholines with carotid artery plaque formation.
- Published
- 2019
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6. Food Insecurity Is Associated With Inflammation Among Women Living With HIV.
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Leddy AM, Roque A, Sheira LA, Frongillo EA, Landay AL, Adedimeji AA, Wilson TE, Merenstein D, Wentz E, Adimora AA, Ofotokun I, Metsch LR, Cohen MH, Tien PC, Turan JM, Turan B, and Weiser SD
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- Adult, Body Mass Index, Cross-Sectional Studies, Female, HIV Infections drug therapy, HIV Infections immunology, Humans, Inflammation immunology, Interleukin-6 immunology, Linear Models, Middle Aged, Multivariate Analysis, Receptors, Tumor Necrosis Factor, Type I immunology, United States epidemiology, Food Supply statistics & numerical data, HIV Infections epidemiology, Inflammation epidemiology
- Abstract
Background: Chronic inflammation is associated with AIDS-defining and non-AIDS-defining conditions. Limited research has considered how food insecurity influences chronic inflammation among people living with human immunodeficiency virus (HIV). We examined whether food insecurity was associated with higher levels of inflammation among women living with HIV (WWH) in the United States., Methods: We analyzed cross-sectional data collected in 2015 from 421 participants on antiretroviral therapy from the Women's Interagency HIV Study. The exposure was any food insecurity. The outcome was inflammation, measured by proinflammatory cytokine interleukin-6 (IL-6) and tumor necroses factor receptor 1 (TNFR1) levels. We conducted multivariable linear regressions, adjusting for sociodemographic, clinical, and nutritional factors., Results: Nearly one-third of participants (31%) were food insecure and 79% were virally suppressed (<20 copies/mL). In adjusted analyses, food insecurity was associated with 1.23 times the level of IL-6 (95% confidence interval [CI], 1.06-1.44) and 1.13 times the level of TNFR1 (95% CI, 1.05-1.21). Findings did not differ by HIV control (virally suppressed with CD4 counts ≥500 cells/mm3 or not) in adjusted stratified analyses., Conclusion: Food insecurity was associated with elevated inflammation among WWH regardless of HIV control. Findings support the need for programs that address food insecurity among WWH.
- Published
- 2019
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7. Association of cognitive activity and neurocognitive function in blacks and whites with HIV.
- Author
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Krueger KR, Adeyemi O, Leurgans S, Shah RC, Jimenez AD, Ouellet L, Landay AL, Bennett DA, and Barnes LL
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- Aged, Aged, 80 and over, Black People, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Surveys and Questionnaires, United States, White People, Black or African American, Cognitive Aging, HIV Infections complications
- Abstract
Objective: Older persons with HIV are at risk for impaired cognition, yet there is limited information on modifiable factors associated with neurocognitive function in this group., Design: This is a cross-sectional observational study of cognitive activities and neurocognitive function., Methods: We examined the relation between frequency of cognitive activity and current neurocognitive performance in 176 older persons with HIV [70% African American, 76% men; mean age = 58.7 (SD = 5.5); mean education = 13.2 (SD = 2.8)]., Results: In linear regression models adjusted for demographic variables, we found that higher frequency of cognitive activity was associated with better cognition in global cognition, semantic memory, and perceptual speed. Subsequent models that examined the role of race demonstrated that the association was significant only among Blacks for global cognition, episodic memory, working memory, and perceptual speed (interaction of cognitive activity by race: Estimate range = 0.38-0.55; all P < 0.05)., Conclusion: Greater frequency of cognitive activity is associated with better neurocognitive function in older persons with HIV, particularly older Blacks. Longitudinal studies are needed to assess the relation of cognitive activity to change in neurocognitive function in older persons with HIV., Competing Interests: Alan L. Landay is on the Scientific Advisory Board for Merck. Lisa L. Barnes is the recipient of grants mentioned above and has no other conflicts of interest. For the remaining authors no conflict of interests or funding sources have been declared.
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- 2017
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8. A 48-week randomized phase 2b study evaluating cenicriviroc versus efavirenz in treatment-naive HIV-infected adults with C-C chemokine receptor type 5-tropic virus.
- Author
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Thompson M, Saag M, DeJesus E, Gathe J, Lalezari J, Landay AL, Cade J, Enejosa J, Lefebvre E, and Feinberg J
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- Adult, Alkynes, Anti-HIV Agents adverse effects, Benzoxazines adverse effects, Cyclopropanes, Double-Blind Method, Female, Genotype, HIV-1 classification, HIV-1 genetics, HIV-1 isolation & purification, Humans, Imidazoles adverse effects, Immunologic Factors administration & dosage, Immunologic Factors adverse effects, Male, Middle Aged, Puerto Rico, Receptors, HIV antagonists & inhibitors, Sulfoxides, Treatment Outcome, United States, Viral Load, Young Adult, Anti-HIV Agents administration & dosage, Benzoxazines administration & dosage, HIV Infections drug therapy, HIV-1 physiology, Imidazoles administration & dosage, Receptors, CXCR5 antagonists & inhibitors, Viral Tropism
- Abstract
Objective: To compare the efficacy, safety, and anti-inflammatory effects of cenicriviroc (CVC), an oral, once-daily C-C chemokine receptor types 5 and 2 antagonist, with those of efavirenz (EFV) in treatment-naive, HIV-1-infected adults., Design: A 48-week, randomized, double-blind, double-dummy phase 2b trial at 43 institutions (USA and Puerto Rico)., Methods: Study participants (HIV-1 RNA ≥1000 copies/ml, CD4 cell count ≥200 cells/μl, C-C chemokine receptor type 5-tropic virus) were randomized 2 : 2 : 1 to CVC 100 mg (CVC100), CVC 200 mg (CVC200), or EFV 600 mg, each administered with emtricitabine/tenofovir disoproxil fumarate. Key end points were virologic success (HIV-1 RNA <50 copies/ml) at week 24 (primary) and week 48 (secondary), safety/tolerability at weeks 24 and 48. Study sites and patients remained blinded until week 48., Results: A total of 143 patients were randomized (CVC100, n = 59; CVC200, n = 56; EFV, n = 28). Virologic success was obtained at week 24 in 76, 73, and 71% of study participants for CVC100, CVC200, and EFV, respectively (all P > 0.05 versus EFV), and at week 48 in 68, 64, and 50%, respectively (all P > 0.05 versus EFV). Resistance mutations emerged in five and zero CVC and EFV-treated study participants, respectively. Virologic nonresponse and nucleoside reverse transcriptase inhibitor resistance decreased when CVC minimum plasma concentration was at least 47.8 ng/ml. Treatment-related adverse events of at least grade 2 and discontinuations because of adverse events were less frequent in CVC-treated study participants. Total and low-density lipoprotein cholesterol decreased with CVC, but increased with EFV. C-C chemokine ligand type 2 (CCL2) (aka monocyte chemotactic protein-1) increased in a dose-dependent manner, whereas soluble CD14 levels decreased with CVC., Conclusion: CVC showed efficacy and favorable safety in treatment-naive HIV-1-infected study participants, supporting selection of CVC200 for phase 3 studies., Trial Registration: NCT01338883.
- Published
- 2016
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