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Hickey M, Kamath M, Shekhtman G, Grogan T, Silacheva I, Shah K, Shah K, Hairapetian A, Gonzalez D, Godoy G, Reed E, Elashoff D, Bondar G, Deng M. Donor Specific Allo-Antibody is Significantly Associated with Variability in Donor-Derived Cell-Free DNA Scores in Adult Heart Transplant Recipients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kamath M, Shekhtman G, Grogan T, Hickey M, Silacheva I, Shah K, Shah K, Hairapetian A, Gonzalez D, Godoy G, Hsu J, Bakir M, Reed E, Elashoff D, Bondar G, Deng M. Using Donor-Derived Cell-Free DNA for Assessment of Myocardial Injury in Heart Transplant Recipients After SARS-CoV2 Infection. J Heart Lung Transplant 2022. [PMCID: PMC8988548 DOI: 10.1016/j.healun.2022.01.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Purpose A link between SARS-CoV2 infection and myocardial injury has been described. Our center utilizes non-invasive surveillance with gene expression profiling and donor-derived cell-free DNA (dd-cfDNA) in heart transplant (HTx) patients who are either stable or in whom invasive surveillance is contraindicated. We evaluated whether HTx recipients diagnosed with SARS-CoV2 infection demonstrated evidence of myocardial allograft injury using dd-cfDNA. Methods HTx recipients were included if they had dd-cfDNA testing (AlloSure; CareDx Inc., Brisbane, CA) within 60 days of their initial SARS-CoV2 diagnosis. Data on hospitalization, therapy, and clinical outcomes was captured. Dd-cfDNA results at the assay limit of detection (LOD, <0.12%) were set equal to the LOD. Results Between 3/2020 and 6/2021, we identified 12 HTx recipients with SARS-CoV2 and dd-cfDNA results within the specified time period; median age was 55 (IQR 28 - 64.5) with infection occurring 506.5 days (IQR 176 - 803.5) after transplant. Mean dd-cfDNA was 0.13 ± 0.03%, assessed 26 (IQR 20 - 35) days after infection. Prior results, available for 9 patients and obtained a median of 33 (IQR 27 - 59) days prior to infection, did not differ from post-infection values (0.13 ± 0.02%, p = 0.66). Following diagnosis, 8 (67%) patients were hospitalized; 5 had mycophenolate held, 2 received steroids, 2 received convalescent plasma, 4 received remdesivir, and 1 received monoclonal Ab therapy. At a median follow-up time of 304 (IQR 212.5 - 331) days after diagnosis, all twelve patients were alive with good allograft function (mean ejection fraction 59 ± 4.8%); interval clinically-relevant immunologic outcomes included one episode of rejection (pAMR1) and three (25%) findings of de novo donor-specific antibodies (dnDSA). Conclusion In this single-center pilot study assessing myocardial injury among HTx recipients within 2 months of SARS-CoV2 infection, the majority of patients had low dd-cfDNA results (<0.15%) and demonstrated good intermediate-term (6-12 months) graft function. While limited by sample size and protocol-based inclusion criteria, our findings suggest that sustained myocardial injury in HTx recipients after SARS-CoV2 infection may not be common. The impact of SARS-CoV2 infection on immunologic outcomes including rejection and dnDSA in this population merit further study.
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Kamath M, Shekhtman G, Grogan T, Hickey M, Silacheva I, Shah K, Shah K, Hairapetian A, Gonzalez D, Godoy G, Reed E, Elashoff D, Bondar G, Deng M. Variability in Donor-Derived Cell-Free DNA Levels Predicts Mortality Risk in Heart Transplant Recipients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Kamath M, Shekhtman G, Grogan T, Hickey MJ, Silacheva I, Shah KS, Shah KS, Hairapetian A, Gonzalez D, Godoy G, Reed EF, Elashoff D, Bondar G, Deng MC. Variability in Donor-Derived Cell-Free DNA Scores to Predict Mortality in Heart Transplant Recipients - A Proof-of-Concept Study. Front Immunol 2022; 13:825108. [PMID: 35251005 PMCID: PMC8895247 DOI: 10.3389/fimmu.2022.825108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/27/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Over the last decade, expanding use of molecular diagnostics in heart transplantation has allowed implementation of non-invasive surveillance strategies for monitoring allograft health. The commercially available HeartCare platform combines the AlloMap gene expression profiling assay and the AlloSure donor-derived cell-free DNA test (dd-cfDNA). Beyond their established use for assessment of rejection, evidence is building for predictive utility, with the longitudinal AlloMap Variability score previously shown to correlate with the risk of future rejection, graft dysfunction, re-transplantation, or death. In this single-center, retrospective pilot study, we evaluated the performance of a novel AlloSure Variability metric in predicting mortality in a cohort of heart transplant recipients. METHODS Seventy-two adult heart transplant recipients with at least 3 concurrent AlloMap/AlloSure results were included. Demographic, clinical, imaging, and laboratory parameters were captured. Variability was defined as the standard deviation of longitudinal AlloMap/AlloSure results. A Cox multivariable adjusted proportional hazards model was used to evaluate the variability metrics as predictors of mortality. Associations between AlloMap/AlloSure variability and donor specific antibody (DSA) status were also assessed. RESULTS A total of 5 patients (6.9%) died during a median follow-up of 480 days. In a univariate Cox proportional hazards model, higher AlloSure variability (HR 1.66, 95%CI 1.14 - 2.41), but not AlloMap variability or the cross-sectional AlloSure/AlloMap results was associated with increased mortality risk. Longitudinal AlloSure variability was also higher among patients with both preformed DSA and those developing de novo DSA. CONCLUSION Our results suggest that increased variability of dd-cfDNA in heart transplant patients is associated with both mortality risk and the presence of donor specific antibodies. These findings highlight the added value of longitudinal data in the interpretation of AlloMap/AlloSure scores in this population and open the door to larger studies investigating the utility of these metrics in shaping post-transplant clinical care paradigms.
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Affiliation(s)
- Megan Kamath
- Divison of Cardiology, Department of Medicine, Ronald Reagan University of California, Los Angeles (UCLA) Medical Center, Los Angeles, CA, United States
| | | | - Tristan Grogan
- Department of Medicine Statistics Core, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Michelle J. Hickey
- University of California, Los Angeles (UCLA) Immunogenetics Center, Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Irina Silacheva
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Karishma S. Shah
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Kishan S. Shah
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Adrian Hairapetian
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Diego Gonzalez
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Giovanny Godoy
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Elaine F. Reed
- University of California, Los Angeles (UCLA) Immunogenetics Center, Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - David Elashoff
- Department of Medicine Statistics Core, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Galyna Bondar
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Mario C. Deng
- Deng Advanced Heart Failure Research Laboratory, Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
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Bondar G, Silacheva I, Bao T, Deshmukh S, Kulkarni N, Nakade T, Grogan T, Elashoff D, Deng M. Independent Validation of a Genomic Heart Failure Survival Prediction Algorithm. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Silacheva I, Bondar G, Nakade T, Grogan T, Elashoff D, Deng M. Phenotype-Guided Inflammation-Related Long Non-Coding RNA Discovery in Heart Failure Survival Prediction. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Bondar G, Silacheva I, Bao TM, Deshmukh S, Kulkarni NS, Nakade T, Grogan T, Elashoff D, Deng MC. Initial independent validation of a genomic heart failure survival prediction algorithm. Expert Review of Precision Medicine and Drug Development 2021. [DOI: 10.1080/23808993.2021.1882847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Galyna Bondar
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
- LeukoLifeDx, Inc.,Rumson, New Jersey, United States
| | - Irina Silacheva
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
| | - Tra-Mi Bao
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
- LeukoLifeDx, Inc.,Rumson, New Jersey, United States
| | - Sumeet Deshmukh
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, UK
| | - Neha S. Kulkarni
- Academic Unit of Reproductive and Developmental Medicine, University of Sheffield, Sheffield, UK
| | - Taisuke Nakade
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
| | - Tristan Grogan
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
| | - David Elashoff
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
| | - Mario C. Deng
- Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA Medical Center, Los Angeles, California, United States
- LeukoLifeDx, Inc.,Rumson, New Jersey, United States
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Bondar G, Bao T, Kurani M, Oh E, Patel K, Shah K, Nelson S, Savvidou S, Kupiec-Weglinsky S, Fadly G, Higuchi E, Silacheva I, LaPierre N, Li Z, Genewick K, Yu S, Grogan T, Elashoff D, Wang W, Ping P, Rossetti M, Reed E, Li X, Deng M. Exercise-Induced Genomic and Transcriptomic Changes in Heart Failure. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Bondar G, Xu W, Elashoff D, Li X, Faure-Kumar E, Bao TM, Grogan T, Moose J, Deng MC. Comparing NGS and NanoString platforms in peripheral blood mononuclear cell transcriptome profiling for advanced heart failure biomarker development. J Biol Methods 2020; 7:e123. [PMID: 31976350 PMCID: PMC6974694 DOI: 10.14440/jbm.2020.300] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 12/17/2022] Open
Abstract
In preparation to create a clinical assay that predicts 1-year survival status of advanced heart failure (AdHF) patients before surgical/interventional therapies and to select the appropriate clinical assay platform for the future assay, we compared the properties of next generation sequencing (NGS) used in the gene discovery phase to the NanoString platform used in the clinical assay development phase. In 25 AdHF patients in a tertiary academic medical center from 2015 to 2016, PBMC samples were collected and aliquoted for NGS RNA whole transcriptome sequencing and compared to 770 genes represented on NanoString's PanCancer IO 360 Gene Expression research panel. Prior to statistical analysis, NanoString and NGS expression values were log transformed. We computed Pearson correlation coefficients for each sample, comparing gene expression values between NanoString and NGS across the set of matched genes and for each of the matched genes across the set of samples. Genes were grouped by average NGS expression, and the NanoString-NGS correlation for each group was computed. Out of 770 genes from the NanoString panel, 734 overlapped between both platforms and showed high intrasample correlation. Within an individual sample, there was an expression-level dependent correlation between both platforms. The low- vs. intermediate/high-expression groups showed NGS average correlation 0.21 vs. 0.58-0.68, respectively, and NanoString average correlation 0.07-0.34 vs. 0.59-0.70, respectively. NanoString demonstrated high reproducibility (R 2 > 0.99 for 100 ng input), sensitivity (probe counts between 100 and 500 detected and quantified), and robustness (similar gene signature scores across different RNA input concentrations, cartridges, and outcomes). Data from NGS and NanoString were highly correlated. These platforms play a meaningful, complementary role in the biomarker development process.
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Affiliation(s)
- Galyna Bondar
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
- LeukoLifeDx, Point Pleasant, NJ 08742, USA
| | - Wenjie Xu
- Nanostring Technologies, Seattle, WA 98109, USA
| | - David Elashoff
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
| | - Xinmin Li
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
| | - Emmanuelle Faure-Kumar
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
| | - Tra-Mi Bao
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
- LeukoLifeDx, Point Pleasant, NJ 08742, USA
| | - Tristan Grogan
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
| | - Jim Moose
- LeukoLifeDx, Point Pleasant, NJ 08742, USA
| | - Mario C. Deng
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, CA 90095, USA
- LeukoLifeDx, Point Pleasant, NJ 08742, USA
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Bondar G, Bao T, Kurani M, Bhaskar D, Le A, Dod R, Khachatoorian Y, Aliyari A, Higuchi E, Oh E, Patel K, Cadeiras M, Schaenman J, Masukawa L, Kupiec-Weglinski S, Groysberg V, Bakir M, Depasquale E, Kamath M, Liem D, Meltzer J, Kwon M, Rossetti M, Elashoff D, Li X, Reed E, Ping P, Deng M. Genomic Prediction of One Year Survival Status Related to Functional Recovery Potential in Advanced Heart Failure Patients Undergoing Mechanical Circulatory Support. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Schaenman JM, Rossetti M, Sidwell T, Groysberg V, Sunga G, Liang E, Vangala S, Chang E, Bakir M, Bondar G, Cadeiras M, Kwon M, Reed EF, Deng M. Association of pro-inflammatory cytokines and monocyte subtypes in older and younger patients on clinical outcomes after mechanical circulatory support device implantation. Hum Immunol 2018; 80:126-134. [PMID: 30445099 DOI: 10.1016/j.humimm.2018.11.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/29/2018] [Accepted: 11/07/2018] [Indexed: 01/30/2023]
Abstract
Noninvasive immunologic analysis of peripheral blood holds promise for explaining the mechanism of development of adverse clinical outcomes, and may also become a method for patient risk stratification before or after mechanical circulatory support device (MCSD) implantation. Dysregulation of the innate immune system is associated with increased patient age but has yet to be evaluated in the older patient with advanced heart failure undergoing MCSD surgery. Patients pre- and post-MCSD implantation had peripheral blood mononuclear cells (PBMC) and serum isolated. Multiparameter flow cytometry was used to analyze markers of innate cell function, including monocyte subtypes. Multiplex cytokine analysis was performed. MELD-XI and SOFA scores were utilized as surrogate markers of outcomes. Increased levels of pro-inflammatory cytokines including IL-15, TNF-α, and IL-10 were associated with increased MELD-XI and SOFA scores. IL-8, TNF- α, and IL-10 were associated with risk of death after MCSD implantation, even with correction for patient age. Increased frequency of 'classical' monocytes (CD14 + CD16-) were associated with increased MELD-XI and SOFA scores. This suggests that inflammation and innate immune system activation contribute to progression to multiorgan system failure and death after MCSD surgery. Development of noninvasive monitoring of peripheral blood holds promise for biomarker development for candidate selection and patient risk stratification.
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Affiliation(s)
- Joanna M Schaenman
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States.
| | - Maura Rossetti
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Tiffany Sidwell
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Victoria Groysberg
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Gemalene Sunga
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Emily Liang
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Sitaram Vangala
- UCLA Department of Medicine Statistics Core, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Eleanor Chang
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Maral Bakir
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Galyna Bondar
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Martin Cadeiras
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Murray Kwon
- Department of Cardiothoracic Surgery, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Elaine F Reed
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Mario Deng
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
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Bao T, Togashi R, Cadeiras M, Schaenman J, Masukawa L, Hai J, Chu D, Chang E, Kupiec-Weglinski S, Groysberg V, Le A, Dod R, Kahn C, Oh E, Do J, Lumintang C, Grogan T, Meltzer J, Kwon M, Rossetti M, Elashoff D, Reed E, Ping P, Bondar G, Deng M. Association between Multidimensional Molecular Biomarkers and Functional Recovery Potential in Advanced Heart Failure. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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13
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Schaenman J, Rossetti M, Sidwell T, Groysberg V, Sunga G, Liang E, Vangala S, Chang E, Bakir M, Bondar G, Cadeiras M, Kwon M, Reed E, Deng M. Frequency of Monocyte Subtypes and TLR4 Expression Correlate with Clinical Outcomes After Mechanical Circulatory Device Implantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Masukawa L, Bao T, Dod R, Togashi R, Cadeiras M, Schaenman J, Hai J, Chu D, Chang E, Kupiec-Weglinski S, Groysberg V, Le A, Kahn C, Oh E, Do J, Lumintang C, Grogan T, Meltzer J, Kwon M, Rossetti M, Elashoff D, Reed E, Ping P, Bondar G, Deng M. Early Postoperative Organ Function Recovery Score and Long-term Survival in Advanced Heart Failure Patients Undergoing Mechanical Circulatory Support. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Bondar G, Bao T, Manoharan R, Togashi R, Agrawal N, Ramachandrula S, Hai J, Chu D, Masukawa L, Cadeiras M, Schaenman J, Chang E, Le A, Dod R, Kahn C, Oh E, Do J, Lumintang C, Kupiec-Weglinski S, Groysberg V, Grogan T, Rossetti M, Elashoff D, Reed E, Ping P, Deng M. Systems Biological Identification of an Age-related Predictor of Functional Recovery Potential in Advanced Heart Failure. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Schaenman JM, Rossetti M, Korin Y, Sidwell T, Groysberg V, Liang E, Vangala S, Wisniewski N, Chang E, Bakir M, Bondar G, Cadeiras M, Kwon M, Reed EF, Deng M. T cell dysfunction and patient age are associated with poor outcomes after mechanical circulatory support device implantation. Hum Immunol 2018; 79:203-212. [PMID: 29409843 DOI: 10.1016/j.humimm.2018.01.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/27/2017] [Accepted: 01/24/2018] [Indexed: 10/18/2022]
Abstract
Immunologic impairment may contribute to poor outcomes after implantation of mechanical circulatory support device (MCSD), with infection often as a terminal event. The study of immune dysfunction is of special relevance given the growing numbers of older patients with heart disease. The aim of the study was to define which immunologic characteristics are associated with development of adverse clinical outcomes after MCSD implantation. We isolated peripheral blood mononuclear cells (PBMC) from patients pre- and up to 20 days post-MCSD implantation and analyzed them by multiparameter flow cytometry for T cell dysfunction, including terminal differentiation, exhaustion, and senescence. We used MELD-XI and SOFA scores measured at each time point as surrogate markers of clinical outcome. Older patients demonstrated increased frequencies of terminally differentiated T cells as well as NKT cells. Increased frequency of terminally differentiated and immune senescent T cells were associated with worse clinical outcome as measured by MELD-XI and SOFA scores, and with progression to infection and death. In conclusion, our data suggest that T cell dysfunction, independently from age, is associated with poor outcomes after MCSD implantation, providing a potential immunologic mechanism behind patient vulnerability to multiorgan dysfunction and death. This noninvasive approach to PBMC evaluation holds promise for candidate evaluation and patient monitoring.
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Affiliation(s)
- Joanna M Schaenman
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States.
| | - Maura Rossetti
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Yael Korin
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Tiffany Sidwell
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Victoria Groysberg
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Emily Liang
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Sitaram Vangala
- UCLA Department of Medicine Statistics Core, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Nicholas Wisniewski
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Eleanor Chang
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Maral Bakir
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Galyna Bondar
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Martin Cadeiras
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Murray Kwon
- Department of Cardiothoracic Surgery, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Elaine F Reed
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
| | - Mario Deng
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA 90095, United States
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Bondar G, Togashi R, Cadeiras M, Schaenman J, Cheng RK, Masukawa L, Hai J, Bao TM, Chu D, Chang E, Bakir M, Kupiec-Weglinski S, Groysberg V, Grogan T, Meltzer J, Kwon M, Rossetti M, Elashoff D, Reed E, Ping PP, Deng MC. Association between preoperative peripheral blood mononuclear cell gene expression profiles, early postoperative organ function recovery potential and long-term survival in advanced heart failure patients undergoing mechanical circulatory support. PLoS One 2017; 12:e0189420. [PMID: 29236770 PMCID: PMC5728510 DOI: 10.1371/journal.pone.0189420] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 11/25/2017] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Multiorgan dysfunction syndrome contributes to adverse outcomes in advanced heart failure (AdHF) patients after mechanical circulatory support (MCS) implantation and is associated with aberrant leukocyte activity. We tested the hypothesis that preoperative peripheral blood mononuclear cell (PBMC) gene expression profiles (GEP) can predict early postoperative improvement or non-improvement in patients undergoing MCS implantation. We believe this information may be useful in developing prognostic biomarkers. METHODS & DESIGN We conducted a study with 29 patients undergoing MCS-surgery in a tertiary academic medical center from 2012 to 2014. PBMC samples were collected one day before surgery (day -1). Clinical data was collected on day -1 and day 8 postoperatively. Patients were classified by Sequential Organ Failure Assessment score and Model of End-stage Liver Disease Except INR score (measured eight days after surgery): Group I = improving (both scores improved from day -1 to day 8, n = 17) and Group II = not improving (either one or both scores did not improve from day -1 to day 8, n = 12). RNA-sequencing was performed on purified mRNA and analyzed using Next Generation Sequencing Strand. Differentially expressed genes (DEGs) were identified by Mann-Whitney test with Benjamini-Hochberg correction. Preoperative DEGs were used to construct a support vector machine algorithm to predict Group I vs. Group II membership. RESULTS Out of 28 MCS-surgery patients alive 8 days postoperatively, one-year survival was 88% in Group I and 27% in Group II. We identified 28 preoperative DEGs between Group I and II, with an average 93% prediction accuracy. Out of 105 DEGs identified preoperatively between year 1 survivors and non-survivors, 12 genes overlapped with the 28 predictive genes. CONCLUSIONS In AdHF patients following MCS implantation, preoperative PBMC-GEP predicts early changes in organ function scores and correlates with long-term outcomes. Therefore, gene expression lends itself to outcome prediction and warrants further studies in larger longitudinal cohorts.
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Affiliation(s)
- Galyna Bondar
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Ryan Togashi
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Martin Cadeiras
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Joanna Schaenman
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Richard K. Cheng
- University of Washington Medical Center, Seattle, Washington, United States of America
| | - Lindsay Masukawa
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Josephine Hai
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Tra-Mi Bao
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Desai Chu
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Eleanor Chang
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Maral Bakir
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | | | - Victoria Groysberg
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Tristan Grogan
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Joseph Meltzer
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Murray Kwon
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Maura Rossetti
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - David Elashoff
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Elaine Reed
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Pei Pei Ping
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
| | - Mario C. Deng
- David Geffen School of Medicine, University of California Los Angeles Medical Center, Los Angeles, California, United States of America
- * E-mail:
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Wisniewski N, Bondar G, Rau C, Chittoor J, Chang E, Esmaeili A, Cadeiras M, Deng M. Integrative model of leukocyte genomics and organ dysfunction in heart failure patients requiring mechanical circulatory support: a prospective observational study. BMC Med Genomics 2017; 10:52. [PMID: 28851355 PMCID: PMC5576384 DOI: 10.1186/s12920-017-0288-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 08/16/2017] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND The implantation of mechanical circulatory support devices in heart failure patients is associated with a systemic inflammatory response, potentially leading to death from multiple organ dysfunction syndrome. Previous studies point to the involvement of many mechanisms, but an integrative hypothesis does not yet exist. Using time-dependent whole-genome mRNA expression in circulating leukocytes, we constructed a systems-model to improve mechanistic understanding and prediction of adverse outcomes. METHODS We sampled peripheral blood mononuclear cells from 22 consecutive patients undergoing mechanical circulatory support device (MCS) surgery, at 5 timepoints: day -1 preoperative, and postoperative days 1, 3, 5, and 8. Clinical phenotyping was performed using 12 clinical parameters, 2 organ dysfunction scoring systems, and survival outcomes. We constructed a strictly phenotype-driven time-dependent non-supervised systems-representation using weighted gene co-expression network analysis, and annotated eigengenes using gene ontology, pathway, and transcription factor binding site enrichment analyses. Genes and eigengenes were mapped to the clinical phenotype using a linear mixed-effect model, with Cox models also fit at each timepoint to survival outcomes. RESULTS We inferred a 19-module network, in which most module eigengenes correlated with at least one aspect of the clinical phenotype. We observed a response of advanced heart failure patients to surgery orchestrated into stages: first, activation of the innate immune response, followed by anti-inflammation, and finally reparative processes such as mitosis, coagulation, and apoptosis. Eigengenes related to red blood cell production and extracellular matrix degradation became predictors of survival late in the timecourse corresponding to multiorgan dysfunction and disseminated intravascular coagulation. CONCLUSIONS Our model provides an integrative representation of leukocyte biology during the systemic inflammatory response following MCS device implantation. It demonstrates consistency with previous hypotheses, identifying a number of known mechanisms. At the same time, it suggests novel hypotheses about time-specific targets.
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Affiliation(s)
- Nicholas Wisniewski
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA. .,Department of Integrative Biology and Physiology, University of California Los Angeles, 612 Charles E. Young Drive East, Los Angeles, California, 90095, USA.
| | - Galyna Bondar
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Christoph Rau
- Department of Anesthesiology, Division of Molecular Medicine, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Jay Chittoor
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Eleanor Chang
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Azadeh Esmaeili
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Martin Cadeiras
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA
| | - Mario Deng
- Department of Medicine, Division of Cardiology, University of California Los Angeles, 100 UCLA Medical Plaza, Suite 630, Los Angeles, California, 90095, USA.
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Bondar G, Cadeiras M, Wisniewski N, Esmaeili A, Godoy G, Maque J, Chang E, Bakir M, Kupiec-Weglinski S, Chu D, Bao T, Hai J, Yee R, Li A, Rai M, Tran D, Madrigal L, Togashi R, Ping P, Reed E, Deng M. Leukocyte Time-Dependent Biology and Outcomes in Advanced Heart Failure. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Chang E, Fishbein G, Bakir M, Liem D, Litovsky S, Tallaj J, Bondar G, Reed E, Deng M, Tabak E, Cadeiras M. Complementary Intragraft and Peripheral Blood Mononuclear Cell Gene Co-Expression Network Analysis of ISHLT Driven versus Unsupervised Molecular Classification. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Wisniewski N, Bondar G, Rau C, Chittoor J, Chang E, Esmaeili A, Deng M. A Gene Expression Biomarker Panel for Predicting Mechanical Circulatory Support Outcomes. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Schaenman J, Korin Y, Sidwell T, Chang E, Bakir M, Wisniewski N, Bondar G, Cadeiras M, Kwon M, Reed E, Deng M. Increase in Frequency of Terminally Differentiated and Exhausted CD8+ T Cells Is Associated with Worse Clinical Outcomes after Mechanical Circulatory Support Device Implantation. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Bakir M, Henriquez-Ticas D, Chang E, Maque J, Chittoor J, Starling C, Bondar G, Wisniewski N, Adigopula S, Khuu T, Reed E, Zhang J, Cadeiras M, Deng M. Time Course of Immunosuppression Minimization and HLA Class I and Class II Antibody Emergence in Heart Transplantation. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Korin Y, Wisniewski N, Cadeiras M, Schaenman J, Kwon M, Sidwell T, Kandarian F, Bondar G, Reed E, Deng M. LBP24. Hum Immunol 2015. [DOI: 10.1016/j.humimm.2015.01.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bondar G, Cadeiras M, Wisniewski N, Maque J, Chittoor J, Chang E, Bakir M, Starling C, Shahzad K, Ping P, Reed E, Deng M. Comparison of whole blood and peripheral blood mononuclear cell gene expression for evaluation of the perioperative inflammatory response in patients with advanced heart failure. PLoS One 2014; 9:e115097. [PMID: 25517110 PMCID: PMC4269402 DOI: 10.1371/journal.pone.0115097] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 11/14/2014] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Heart failure (HF) prevalence is increasing in the United States. Mechanical Circulatory Support (MCS) therapy is an option for Advanced HF (AdHF) patients. Perioperatively, multiorgan dysfunction (MOD) is linked to the effects of device implantation, augmented by preexisting HF. Early recognition of MOD allows for better diagnosis, treatment, and risk prediction. Gene expression profiling (GEP) was used to evaluate clinical phenotypes of peripheral blood mononuclear cells (PBMC) transcriptomes obtained from patients' blood samples. Whole blood (WB) samples are clinically more feasible, but their performance in comparison to PBMC samples has not been determined. METHODS We collected blood samples from 31 HF patients (57±15 years old) undergoing cardiothoracic surgery and 7 healthy age-matched controls, between 2010 and 2011, at a single institution. WB and PBMC samples were collected at a single timepoint postoperatively (median day 8 postoperatively) (25-75% IQR 7-14 days) and subjected to Illumina single color Human BeadChip HT12 v4 whole genome expression array analysis. The Sequential Organ Failure Assessment (SOFA) score was used to characterize the severity of MOD into low (≤ 4 points), intermediate (5-11), and high (≥ 12) risk categories correlating with GEP. RESULTS Results indicate that the direction of change in GEP of individuals with MOD as compared to controls is similar when determined from PBMC versus WB. The main enriched terms by Gene Ontology (GO) analysis included those involved in the inflammatory response, apoptosis, and other stress response related pathways. The data revealed 35 significant GO categories and 26 pathways overlapping between PBMC and WB. Additionally, class prediction using machine learning tools demonstrated that the subset of significant genes shared by PBMC and WB are sufficient to train as a predictor separating the SOFA groups. CONCLUSION GEP analysis of WB has the potential to become a clinical tool for immune-monitoring in patients with MOD.
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Affiliation(s)
- Galyna Bondar
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Martin Cadeiras
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Nicholas Wisniewski
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Jetrina Maque
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Jay Chittoor
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Eleanor Chang
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Maral Bakir
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Charlotte Starling
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Khurram Shahzad
- Columbia University, New York, NY, United States of America
- East Carolina University, Greenville, NC, United States of America
| | - Peipei Ping
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Elaine Reed
- University of California Los Angeles, Los Angeles, CA, United States of America
| | - Mario Deng
- University of California Los Angeles, Los Angeles, CA, United States of America
- Columbia University, New York, NY, United States of America
- * E-mail:
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Bondar G, Cadeiras M, Wisniewski N, Chang E, Bakir M, Chittoor J, Maque J, Dong K, Deng M. NGS PBMC Transcriptome Analysis Identifies More Pronounced Activation of the Inflammatory Response in Advanced INTERMACS Class Before MCSD Implantation. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Chang E, Cadeiras M, Chan C, Bondar G, Wisniewski N, Bakir M, Chittoor J, Khuu T, Deng M. Differential Mitochondrial Gene Expression in Patients Undergoing MCSD Implantation. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Bondar G, Cadeiras M, Wisniewski N, Cheng R, Shahzad K, Onat D, Latif F, Chang E, Deng M. Whole Blood Gene Expression of Multiorgan Dysfunction (MOD) after LVAD Implantation. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Wisniewski N, Cadeiras M, Bondar G, Cheng R, Shahzad K, Onat D, Latif F, Korin Y, Reed E, Fakhro R, Deng M. Weighted Gene Coexpression Network Analysis (WGCNA) Modeling of Multiorgan Dysfunction Syndrome after Mechanical Circulatory Support Therapy. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Shahzad K, Fatima A, Cadeiras M, Wisniewski N, Bondar G, Cheng R, Reed E, Deng M. Challenges and solutions in the development of genomic biomarker panels: a systematic phased approach. Curr Genomics 2012. [PMID: 23204923 PMCID: PMC3394121 DOI: 10.2174/138920212800793339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
In the post-genome era, high throughput gene expression profiling has been successfully used to develop genomic biomarker panels (GBP) that can be integrated into clinical decision making. The development of GBPs in the context of personalized medicine is a scientifically challenging and resource-intense process. It needs to be accomplished in a systematic phased approach to address biological variation related to a clinical phenotype (e.g. disease etiology, gender, etc.) and minimize technical variation (noise). Here we present the methodological aspects of GBP development based on the experience of the Cardiac Allograft Rejection Gene Expression Observation (CARGO) study, a study that lead to the development of a molecular classifier for rejection screening in heart transplant patients.
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Affiliation(s)
- K Shahzad
- Department of Internal Medicine, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
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Wisniewski N, Shahzad K, Cheng RK, Bondar G, Cadeiras M, Shukradas S, Akashi H, Onat D, Latif F, Deng MC. MultiOrgan Dysfunction After Mechanical Support Is Linked to the Simultaneous Upregulation of Innate Immunity and Supression of Adaptive Immunity. J Card Fail 2012. [DOI: 10.1016/j.cardfail.2012.06.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kuo J, Hamid N, Bondar G, Dewing P, Clarkson J, Micevych P. Sex differences in hypothalamic astrocyte response to estradiol stimulation. Biol Sex Differ 2010; 1:7. [PMID: 21208471 PMCID: PMC3016240 DOI: 10.1186/2042-6410-1-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Accepted: 11/22/2010] [Indexed: 01/05/2023] Open
Abstract
Background Reproductive functions controlled by the hypothalamus are highly sexually differentiated. One of the most dramatic differences involves estrogen positive feedback, which leads to ovulation. A crucial feature of this positive feedback is the ability of estradiol to facilitate progesterone synthesis in female hypothalamic astrocytes. Conversely, estradiol fails to elevate hypothalamic progesterone levels in male rodents, which lack the estrogen positive feedback-induced luteinizing hormone (LH) surge. To determine whether hypothalamic astrocytes are sexually differentiated, we examined the cellular responses of female and male astrocytes to estradiol stimulation. Methods Primary adult hypothalamic astrocyte cultures were established from wild type rats and mice, estrogen receptor-α knockout (ERKO) mice, and four core genotype (FCG) mice, with the sex determining region of the Y chromosome (Sry) deleted and inserted into an autosome. Astrocytes were analyzed for Sry expression with reverse transcription PCR. Responses to estradiol stimulation were tested by measuring free cytoplasmic calcium concentration ([Ca2+]i) with fluo-4 AM, and progesterone synthesis with column chromatography and radioimmunoassay. Membrane estrogen receptor-α (mERα) levels were examined using surface biotinylation and western blotting. Results Estradiol stimulated both [Ca2+]i release and progesterone synthesis in hypothalamic astrocytes from adult female mice. Male astrocytes had a significantly elevated [Ca2+]i response but it was significantly lower than in females, and progesterone synthesis was not enhanced. Surface biotinylation demonstrated mERα in both female and male astrocytes, but only in female astrocytes did estradiol treatment increase insertion of the receptor into the membrane, a necessary step for maximal [Ca2+]i release. Regardless of the chromosomal sex, estradiol facilitated progesterone synthesis in astrocytes from mice with ovaries (XX and XY-), but not in mice with testes (XY-Sry and XXSry). Conclusions Astrocytes are sexually differentiated, and in adulthood reflect the actions of sex steroids during development. The response of hypothalamic astrocytes to estradiol stimulation was determined by the presence or absence of ovaries, regardless of chromosomal sex. The trafficking of mERα in female, but not male, astrocytes further suggests that cell signaling mechanisms are sexually differentiated.
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Affiliation(s)
- John Kuo
- Department of Neurobiology, Laboratory of Neuroendocrinology of the Brain Research Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.
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Tsirulnikov K, Abuladze N, Koag MC, Newman D, Scholz K, Bondar G, Zhu Q, Avliyakulov NK, Dekant W, Faull K, Kurtz I, Pushkin A. Transport of N-acetyl-S-(1,2-dichlorovinyl)-L-cysteine, a metabolite of trichloroethylene, by mouse multidrug resistance associated protein 2 (Mrp2). Toxicol Appl Pharmacol 2010; 244:218-25. [PMID: 20060011 DOI: 10.1016/j.taap.2009.12.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Revised: 12/18/2009] [Accepted: 12/22/2009] [Indexed: 12/20/2022]
Abstract
N-acetyl-S-(1,2-dichlorovinyl)-l-cysteine (Ac-DCVC) and S-(1,2-dichlorovinyl)-l-cysteine (DCVC) are the glutathione conjugation pathway metabolites of a common industrial contaminant and potent nephrotoxicant trichloroethylene (TCE). Ac-DCVC and DCVC are accumulated in the renal proximal tubule where they may be secreted into the urine by an unknown apical transporter(s). In this study, we explored the hypothesis that the apical transport of Ac-DCVC and/or DCVC may be mediated by the multidrug resistance associated protein 2 (Mrp2, ABCC2), which is known to mediate proximal tubular apical ATP-dependent transport of glutathione and numerous xenobiotics and endogenous substances conjugated with glutathione. Transport experiments using membrane vesicles prepared from mouse proximal tubule derived cells expressing mouse Mrp2 utilizing ATPase assay and direct measurements of Ac-DCVC/DCVC using liquid chromatography/tandem mass-spectrometry (LC/MS/MS) demonstrated that mouse Mrp2 mediates ATP-dependent transport of Ac-DCVC. Expression of mouse Mrp2 antisense mRNA significantly inhibited the vectorial basolateral to apical transport of Ac-DCVC but not DCVC in mouse proximal tubule derived cells endogenously expressing mouse Mrp2. The results suggest that Mrp2 may be involved in the renal secretion of Ac-DCVC.
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Affiliation(s)
- Kirill Tsirulnikov
- Department of Medicine/Nephrology, David Geffen School of Medicine, University of California at Los Angeles, CA 90095, USA
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Abstract
Astrocytes are the most abundant cells in the central nervous system (CNS). It appears that astrocytes are as diverse as neurons, having different phenotypes in various regions throughout the brain and participating in intercellular communication that involves signaling to neurons. It is not surprising then that astrocytes in the hypothalamus have an active role in the CNS regulation of reproduction. In addition to the traditional mechanism involving ensheathment of neurons and processes, astrocytes may have a critical role in regulating estrogen-positive feedback. Work in our laboratory has focused on the relationship between circulating estradiol and progesterone synthesized de novo in the brain. We have demonstrated that circulating estradiol stimulates the synthesis of progesterone in adult hypothalamic astrocytes, and this neuroprogesterone is critical for initiating the LH surge. Estradiol cell signaling is initiated at the cell membrane and involves the transactivation of metabotropic glutamate receptor type 1a (mGluR1a) leading to the release of intracellular stores of calcium. We used surface biotinylation to demonstrate that estrogen receptor-alpha (ERalpha) is present in the cell membrane and has an extracellular portion. Like other membrane receptors, ERalpha is inserted into the membrane and removed via internalization after agonist stimulation. This trafficking is directly regulated by estradiol, which rapidly and transiently increases the levels of membrane ERalpha, and upon activation, increases internalization that finally leads to ERalpha degradation. This autoregulation temporally limits membrane-initiated estradiol cell signaling. Thus, neuroprogesterone, the necessary signal for the LH surge, is released when circulating levels of estradiol peak on proestrus and activate progesterone receptors whose expression has been induced by the gradual rise of estradiol during follicular development.
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Affiliation(s)
- Paul Micevych
- Department of Neurobiology, Laboratory of Neuroendocrinology, UCLA Brain Research Institute, Los Angeles, Calif., USA
- *Paul Micevych, Department of Neurobiology, David Geffen School of Medicine at UCLA, 10833 LeConte Avenue, 73-078 CHS, Los Angeles, CA 90095-1763 (USA), Tel. +1 310 206 8265, Fax +1 310 825 2224, E-Mail
| | - Galyna Bondar
- Department of Neurobiology, Laboratory of Neuroendocrinology, UCLA Brain Research Institute, Los Angeles, Calif., USA
| | - John Kuo
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, Calif., USA
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Kuo J, Hariri OR, Bondar G, Ogi J, Micevych P. Membrane estrogen receptor-alpha interacts with metabotropic glutamate receptor type 1a to mobilize intracellular calcium in hypothalamic astrocytes. Endocrinology 2009; 150:1369-76. [PMID: 18948402 PMCID: PMC2654734 DOI: 10.1210/en.2008-0994] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Estradiol, acting on a membrane-associated estrogen receptor-alpha (mERalpha), induces an increase in free cytoplasmic calcium concentration ([Ca(2+)](i)) needed for progesterone synthesis in hypothalamic astrocytes. To determine whether rapid estradiol signaling involves an interaction of mERalpha with metabotropic glutamate receptor type 1a (mGluR1a), changes in [Ca(2+)](i) were monitored with the calcium indicator, Fluo-4 AM, in primary cultures of female postpubertal hypothalamic astrocytes. 17beta-Estradiol over a range of 1 nm to 100 nm induced a maximal increase in [Ca(2+)](i) flux measured as a change in relative fluorescence [DeltaF Ca(2+) = 615 +/- 36 to 641 +/- 47 relative fluorescent units (RFU)], whereas 0.1 nm of estradiol stimulated a moderate [Ca(2+)](i) increase (275 +/- 16 RFU). The rapid estradiol-induced [Ca(2+)](i) flux was blocked with 1 microm of the estrogen receptor antagonist ICI 182,780 (635 +/- 24 vs. 102 +/- 11 RFU, P < 0.001) and 20 nmof the mGluR1a antagonist LY 367385 (617 +/- 35 vs. 133 +/- 20 RFU, P < 0.001). Whereas the mGluR1a receptor agonist (RS)-3,5-dihydroxyphenyl-glycine (50 microm) also stimulated a robust [Ca(2+)](i) flux (626 +/- 23 RFU), combined treatment of estradiol (1 nm) plus (RS)-3,5-dihydroxyphenyl-glycine (50 microm) augmented the [Ca(2+)](i) response (762 +/- 17 RFU) compared with either compound alone (P < 0.001). Coimmunoprecipitation demonstrated a direct physical interaction between mERalpha and mGluR1a in the plasma membrane of hypothalamic astrocytes. These results indicate that mERalpha acts through mGluR1a, and mGluR1a activation facilitates the estradiol response, suggesting that neural activity can modify estradiol-induced membrane signaling in astrocytes.
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Affiliation(s)
- John Kuo
- Department of Neurobiology, David Geffen School of Medicine at University of California, Los Angeles, 10833 LeConte Avenue, 73-078 CHS, Los Angeles, California 90095-1763.
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Abstract
Rapid membrane-mediated estradiol signaling regulating sexual receptivity requires the interaction of the estrogen receptor (ER)-alpha and the metabotropic glutamate receptor 1a (mGluR1a). A cell signaling antibody microarray revealed that estradiol activated 42 proteins in the arcuate nucleus of the hypothalamus (ARH). To begin an analysis of various signaling pathways, protein kinase A and protein kinase C (PKC)-theta, whose signaling pathways have been implicated in the estradiol regulation of sexual receptivity, were examined. In the ARH sample, the increase in phospho-protein kinase A could not be confirmed by Western blotting, in either cytosolic or membrane fractions. However, the increase in phosphorylated PKCtheta seen with the pathway array was verified by Western blotting. To study whether rapid estradiol activation of PKC regulates the ARH-medial preoptic nucleus pathway regulating lordosis, mu-opioid receptor (MOR) internalization and lordosis reflex were tested. Blocking PKC in ARH with 2-[1-(3-dimethylaminopropyl)-1H-indol-3-yl]3-(1H-indol-3-yl) maleimide significantly attenuated estradiol-induced MOR internalization. Furthermore, disruption of PKC signaling within the ARH at the time of estradiol treatment significantly diminished the lordosis reflex. Moreover, blocking PKC prevented MOR internalization when the circuit was activated by the mGluR1a agonist, (RS)-3,5-dihydroxyphenylglycine. Activation of PKC with phorbol 12, 13-dibutyrate induced MOR internalization, indicating that PKC was a critical step for membrane ERalpha-initiated mGluR1a-mediated cell signaling and phorbol 12, 13-dibutyrate significantly facilitated the lordosis reflex. Together these findings indicate that rapid membrane ERalpha-mGluR1a interactions activate PKCtheta cell signaling, which regulates female sexual receptivity.
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Affiliation(s)
- Phoebe Dewing
- Department of Neurobiology, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California 90095-1763, USA
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Ryazantsev S, Abuladze N, Newman D, Bondar G, Kurtz I, Pushkin A. Structural characterization of dimeric murine aminoacylase III. FEBS Lett 2007; 581:1898-902. [PMID: 17434493 DOI: 10.1016/j.febslet.2007.03.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 03/14/2007] [Accepted: 03/22/2007] [Indexed: 01/08/2023]
Abstract
Aminoacylase III (AAIII) plays an important role in deacetylation of acetylated amino acids and N-acetylated S-cysteine conjugates of halogenated alkenes and alkanes. AAIII, recently cloned from mouse kidney and partially characterized, is a mixture of tetramers and dimers. In the present work, AAIII dimers were purified and shown to be enzymatically active. Limited trypsinolysis showed two domains of approximately 9 and 25 kDa. The three-dimensional structure of the dimer was studied by electron microscopy of negative stained samples and by single-particle reconstruction. A 16A resolution model of the AAIII dimer was created. It has an unusual, cage-like, structure. A realistic AAIII tetramer model was built from two dimers.
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Affiliation(s)
- Sergey Ryazantsev
- Department of Biological Chemistry, David Geffen School of Medicine, University of California at Los Angeles, Room 33-080 CHS, 10833 Le Conte Avenue, CA 90095-1689, USA
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Newman D, Abuladze N, Scholz K, Dekant W, Tsuprun V, Ryazantsev S, Bondar G, Sassani P, Kurtz I, Pushkin A. Specificity of Aminoacylase III-Mediated Deacetylation of Mercapturic Acids. Drug Metab Dispos 2006; 35:43-50. [PMID: 17012540 DOI: 10.1124/dmd.106.012062] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Trichloroethylene (TCE) and other halogenated alkenes are known environmental contaminants with cytotoxic and nephrotoxic effects, and are potential carcinogens. Their metabolism via the mercapturate metabolic pathway was shown to lead to their detoxification. The final products of this pathway, mercapturic acids or N-acetyl-l-cysteine S-conjugates, are secreted into the lumen in the renal proximal tubule. The proximal tubule may also deacetylate mercapturic acids, and the resulting cysteine S-conjugates are transformed by cysteine S-conjugate beta-lyases to nephrotoxic reactive thiols. The specificity and rate of mercapturic acid deacetylation may determine the toxicity of certain mercapturic acids; however, the exact enzymologic processes involved are not known in detail. In the present study we characterized the kinetics of the recently cloned mouse aminoacylase III (AAIII) toward a wide spectrum of halogenated mercapturic acids and N-acetylated amino acids. In general, the V(max) value of AAIII was significantly larger with chlorinated and brominated mercapturic acids, whereas fluorination significantly decreased it. The enzyme deacetylated mercapturic acids derived from the TCE metabolism including N-acetyl-S-(1,2-dichlorovinyl)-l-cysteine (NA-1,2-DCVC) and N-acetyl-S-(2,2-dichlorovinyl)-l-cysteine (NA-2,2-DCVC). Both mercapturic acids induced cytotoxicity in mouse proximal tubule mPCT cells expressing AAIII, which was decreased by an inhibitor of beta-lyase, aminooxyacetate. The toxic effect of NA-2,2-DCVC was smaller than that of NA-1,2-DCVC, indicating that factors other than the intracellular activity of AAIII mediate the cytotoxicity of these mercapturic acids. Our results indicate that in proximal tubule cells, AAIII plays an important role in deacetylating several halogenated mercapturic acids, and this process may be involved in their cyto- and nephrotoxicity.
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Affiliation(s)
- Debra Newman
- Division of Nephrology, David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, 7-155 Factor Building, Los Angeles, CA 90095-1689, USA
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Bondar G, Pushkin A, Abuladze N, Kurtz I. HCO
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and pH Modulate the Binding of Carbonic Anhydrase II to the Carboxy‐Terminus of kNBC1. FASEB J 2006. [DOI: 10.1096/fasebj.20.5.a1222-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Galyna Bondar
- Division of NephrologyUCLA7‐155 Factor Bldg, 10833 Le Conte AveLos AngelesCalifornia90095
| | - Alexander Pushkin
- Division of NephrologyUCLA7‐155 Factor Bldg, 10833 Le Conte AveLos AngelesCalifornia90095
| | - Natalia Abuladze
- Division of NephrologyUCLA7‐155 Factor Bldg, 10833 Le Conte AveLos AngelesCalifornia90095
| | - Ira Kurtz
- Division of NephrologyUCLA7‐155 Factor Bldg, 10833 Le Conte AveLos AngelesCalifornia90095
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Untch M, Kahlert S, Kosse V, Bondar G, Kienle E, Maubach L, Hillger H, Schmid P, Possinger K, Wallwiener D. Leuprorelinacetat als 3-Monats-Depot zeigt gleiche Wirksamkeit wie CMF in der adjuvanten Therapie prä- und perimenopausaler, nodal positiver Mammakarzinom-Patientinnen mit positivem Rezeptorstatus - Die TABLE-Studie. Geburtshilfe Frauenheilkd 2004. [DOI: 10.1055/s-2004-830329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Pushkin A, Abuladze N, Gross E, Newman D, Tatishchev S, Lee I, Fedotoff O, Bondar G, Azimov R, Ngyuen M, Kurtz I. Molecular mechanism of kNBC1-carbonic anhydrase II interaction in proximal tubule cells. J Physiol 2004; 559:55-65. [PMID: 15218065 PMCID: PMC1665076 DOI: 10.1113/jphysiol.2004.065110] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
We have recently shown that carbonic anhydrase II (CAII) binds in vitro to the C-terminus of the electrogenic sodium bicarbonate cotransporter kNBC1 (kNBC1-ct). In the present study we determined the molecular mechanisms for the interaction between the two proteins and whether kNBC1 and CAII form a transport metabolon in vivo wherein bicarbonate is transferred from CAII directly to the cotransporter. Various residues in the C-terminus of kNBC1 were mutated and the effect of these mutations on both the magnitude of CAII binding and the function of kNBC1 expressed in mPCT cells was determined. Two clusters of acidic amino acids, L(958)DDV and D(986)NDD in the wild-type kNBC1-ct involved in CAII binding were identified. In both acidic clusters, the first aspartate residue played a more important role in CAII binding than others. A significant correlation between the magnitude of CAII binding and kNBC1-mediated flux was shown. The results indicated that CAII activity enhances flux through the cotransporter when the enzyme is bound to kNBC1. These data are the first direct evidence that a complex of an electrogenic sodium bicarbonate cotransporter with CAII functions as a transport metabolon.
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Affiliation(s)
- Alexander Pushkin
- Division of Nephrology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.
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Abstract
The histopathology of the skin in the ichthyosiform erythroderma associated with classical Conradi-Hunermann syndrome has been rarely described. Skin biopsies from 2 infants with the classical features of Conradi-Hunermann syndrome including ichthyosiform erythroderma contained hyperkeratosis, dilated ostia of pilosebaceous structures, and calcium salts in the stratum corneum detectable with special stains. An unusual feature of one case was dilatation of acrosyringeal structures. We hypothesize that dilatation of acrosyringeal structures is analogous to the plugging noted in pilosebaceous units. Taken together, the ichthyosiform erythroderma of Conradi-Hunermann has a distinctive histologic appearance.
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Affiliation(s)
- T Hamaguchi
- Division of Dermatology, Saint Louis University, School of Medicine, MO, USA
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