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Ndung'u T. The KT Jeang retrovirology prize 2023: Thumbi Ndung'u. Retrovirology 2023; 20:17. [PMID: 37848918 PMCID: PMC10583396 DOI: 10.1186/s12977-023-00632-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023] Open
Affiliation(s)
- Thumbi Ndung'u
- Africa Health Research Institute, Durban, South Africa.
- HIV Pathogenesis Programme, The Doris Duke Medical Research Institute, University of KwaZulu-Natal, Durban, South Africa.
- Ragon Institute of MGH, MIT and Harvard University, Cambridge, MA, USA.
- Division of Infection and Immunity, University College London, London, UK.
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Bone marrow stromal antigen 2 (BST-2) genetic variants influence expression levels and disease outcome in HIV-1 chronically infected patients. Retrovirology 2022; 19:3. [PMID: 35081977 PMCID: PMC8793201 DOI: 10.1186/s12977-022-00588-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 01/11/2022] [Indexed: 11/26/2022] Open
Abstract
Background Bone marrow stromal antigen 2 (BST-2) also known as Tetherin (CD317/HM1.24), is a host restriction factor that blocks the release of HIV-1 virions from infected cells. Previous studies reported that BST-2 genetic variants or single nucleotide polymorphims (SNPs) have a preventative role during HIV-1 infection. However, the influence of BST-2 SNPs on expression levels remains unknown. In this study, we investigated the influence of BST-2 SNPs on expression levels and disease outcome in HIV-1 subtype C chronically infected antiretroviral therapy naïve individuals. Results We quantified BST-2 mRNA levels in peripheral blood mononuclear cells (PBMCs), determined BST-2 protein expression on the surface of CD4+ T cells using flow cytometry and genotyped two intronic single nucleotide polymorphisms (SNPs) rs919267 and rs919266 together with one SNP rs9576 located in the 3’ untranslated region (UTR) of bst-2 gene using TaqMan assays from HIV-1 uninfected and infected participants. Subsequently, we determined the ability of plasma antibody levels to mediate antibody-dependent cellular phagocytosis (ADCP) using gp120 consensus C and p24 subtype B/C protein. Fc receptor-mediated NK cell degranulation was evaluated as a surrogate for ADCC activity using plasma from HIV-1 positive participants. BST-2 mRNA expression levels in PBMCs and protein levels on CD4+ T cells were lower in HIV-1 infected compared to uninfected participants (p = 0.075 and p < 0.001, respectively). rs919267CT (p = 0.042) and rs919267TT (p = 0.045) were associated with lower BST-2 mRNA expression levels compared to rs919267CC in HIV-1 uninfected participants. In HIV-1 infected participants, rs919267CT associated with lower CD4 counts, (p = 0.003), gp120-IgG1 (p = 0.040), gp120-IgG3 (p = 0.016) levels but higher viral loads (p = 0.001) while rs919267TT was associated with lower BST-2 mRNA levels (p = 0.046), CD4 counts (p = 0.001), gp120-IgG1 levels (p = 0.033) but higher plasma viral loads (p = 0.007). Conversely, rs9576CA was associated with higher BST-2 mRNA expression levels (p = 0.027), CD4 counts (p = 0.079), gp120-IgG1 (p = 0.009), gp120-IgG3 (p = 0.039) levels but with lower viral loads (p = 0.037). Conclusion Our findings show that bst-2 SNPs mediate BST-2 expression and disease outcome, correlate with gp120-IgG1, gp120-IgG3 levels but not p24-IgG levels, ADCC and ADCP activity. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12977-022-00588-2.
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Amanya SB, Nyiro B, Waswa F, Obura B, Nakaziba R, Nabulime E, Katabazi AF, Nabatanzi R, Bayiyana A, Mboowa G, Kayongo A, Wayengera M, Sande OJ. Variations in Trim5α and Cyclophilin A genes among HIV-1 elite controllers and non controllers in Uganda: a laboratory-based cross-sectional study. Retrovirology 2020; 17:19. [PMID: 32631377 PMCID: PMC7339491 DOI: 10.1186/s12977-020-00527-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 06/27/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Tripartite Motif Containing 5 alpha (TRIM5α), a restriction factor produced ubiquitously in cells and tissues of the body plays an important role in the immune response against HIV. TRIM5α targets the HIV capsid for proteosomal destruction. Cyclophilin A, an intracellular protein has also been reported to influence HIV infectivity in a cell-specific manner. Accordingly, variations in TRIM5α and Cyclophilin A genes have been documented to influence HIV-1 disease progression. However, these variations have not been documented among Elite controllers in Uganda and whether they play a role in viral suppression remains largely undocumented. Our study focused on identifying the variations in TRIM5α and Cyclophilin A genes among HIV-1 Elite controllers and non-controllers in Uganda. RESULTS From the sequence analysis, the rs10838525 G > A mutation in exon 2 of TRIM5α was only found among elite controllers (30%) while the rs3824949 in the 5'UTR was seen among 25% of the non-controllers. In the Cyclophilin A promoter, rs6850 was seen among 62.5% of the non-controllers and only among 10% elite controllers. Furthermore, rs17860048 in the Cyclophillin A promoter was predominantly seen among elite controllers (30%) and 12.5% non-controllers. From gene expression analysis, we noted that the respective genes were generally elevated among elite controllers, however, this difference was not statistically significant (TRIM5α p = 0.6095; Cyclophilin A p = 0.6389). CONCLUSION Variations in TRIM5α and Cyclophillin A promoter may influence HIV viral suppression. The rs10838525 SNP in TRIM5α may contribute to viral suppression among HIV-1 elite controllers. The rs6850 in the cyclophillin A gene may be responsible for HIV-1 rapid progression among HIV-1 non-controllers. These SNPs should be investigated mechanistically to determine their precise role in HIV-1 viral suppression.
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Affiliation(s)
- Sharon Bright Amanya
- Faculty of Health Sciences, Lira University, Lira, Uganda ,grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Brian Nyiro
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Francis Waswa
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | | | | | - Eva Nabulime
- grid.436163.50000 0004 0648 1108Center for AIDS Research (CFAR) Lab, Joint Clinical Research Center, Kampala, Uganda
| | - Ashaba Fred Katabazi
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Rose Nabatanzi
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Alice Bayiyana
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Gerald Mboowa
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda ,grid.11194.3c0000 0004 0620 0548The African Center of Excellence in Bioinformatics and Data Intensive Sciences, the Infectious Diseases Institute, McKinnell Knowledge Centre, Makerere University, Kampala, Uganda
| | - Alex Kayongo
- grid.11194.3c0000 0004 0620 0548Makerere University Lung Institute, Kampala, Uganda
| | - Misaki Wayengera
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
| | - Obondo J. Sande
- grid.11194.3c0000 0004 0620 0548Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Kampala, Uganda
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Shi R, Luo Y, Li S, Kong M, Liu X, Yu M, Wu J, Huang L, Yang Z. Single-nucleotide Polymorphism rs17860041 A/C in the Promoter of the PPIA Gene is Associated with Susceptibility to Kawasaki Disease in Chinese Children. Immunol Invest 2020; 50:230-242. [PMID: 32079425 DOI: 10.1080/08820139.2020.1727919] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background: Kawasaki disease (KD) is an acute systemic vasculitis of unknown etiology. Cyclophilin A (CypA), also known as PPIA, has been identified to play a vital role in the pathogenesis of cardiovascular or inflammatory diseases. However, no studies have examined the relationship between single-nucleotide polymorphisms (SNPs) in the peptidylprolyl isomerase A (PPIA) and the development of KD and KD with or without coronary artery lesions (CALs). Objective: The present study was conducted to evaluate whether PPIA SNPs are associated with susceptibility to KD or CALs in KD. Methods: Three PPIA SNPs were genotyped in 101 KD patients and 105 healthy controls from a Chinese population. The allele and genotype frequencies were compared between the case and control groups, as well as in KD patients with and without CALs. Results: The data revealed a significant difference in the genotype and allele frequencies of rs17860041 A/C between KD patients and normal controls. Compared to the rs17860041 CC genotype, the AC genotype demonstrated a consistently beneficial roles in reducing the KD incidence. Furthermore, the allele frequency of C in the KD group was higher than that in the control group (P < .05). Haplotype analysis for PPIA polymorphisms (rs10951772 A/G, rs17860041 A/C, and rs4720485 A/T) also confirmed this association in KD patients and normal controls. Conclusion: A PPIA promoter SNP (rs17860041 A/C) confers susceptibility to KD in Chinese children and was identified as an important marker of KD in this study.
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Affiliation(s)
- Ruting Shi
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Yeping Luo
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Shentang Li
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Min Kong
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Xin Liu
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Meng Yu
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Jiping Wu
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
| | - Lihua Huang
- Center for Medical Experiments, the Third Xiangya Hospital, Central South University , Changsha, Hunan, China
| | - Zuocheng Yang
- Department of Pediatrics, Third Xiangya Hospital of Central South University , Changsha, Hunan, P.R. China
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Rath D, von Ungern-Sternberg S, Heinzmann D, Sigle M, Monzien M, Horstmann K, Schaeffeler E, Winter S, Müller K, Groga-Bada P, Zdanyte M, Borst O, Zernecke A, Gawaz M, Martus P, Schwab M, Geisler T, Seizer P. Platelet surface expression of cyclophilin A is associated with increased mortality in patients with symptomatic coronary artery disease. J Thromb Haemost 2020; 18:234-242. [PMID: 31519036 DOI: 10.1111/jth.14635] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 08/06/2019] [Accepted: 09/03/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Cyclophilin A (CyPA) is an important intracellular molecule mediating essential cellular functions such as signaling and protein folding. Enhanced CyPA platelet surface expression is associated with hypertension and hypercholesterolemia in patients with stable coronary artery disease (CAD). In patients with acute myocardial infarction CyPA platelet surface expression is significantly decreased. The aim of this study was to investigate possible associations of CyPA platelet surface expression and a clinically relevant CyPA single-nucleotide polymorphism (CyPA PPIA rs6850) with prognosis in patients with symptomatic cardiovascular disease. MATERIALS AND METHODS Blood was obtained from 335 consecutive patients with symptomatic CAD. All patients were followed up for 1080 days for endpoints all-cause death, myocardial infarction (MI), ischemic stroke, and bleeding. The primary combined endpoint was defined as a composite of all-cause death and/or MI and/or ischemic stroke. Cyclophilin A platelet surface expression levels less than or equal to the median were significantly associated with a worse prognosis (combined endpoint and all-cause death) when compared to CyPA greater than the median. Genotyping for CyPA PPIA rs6850 was performed in 752 patients with symptomatic CAD. Homozygous carriers of the minor allele showed a significantly worse cumulative event-free survival for both combined endpoint and MI when compared to carriers of the major allele. CONCLUSION The CyPA platelet surface expression is associated with mortality whereas CyPA PPIA rs6850 is associated with recurrent MI in patients with symptomatic CAD. Cyclophilin A might offer a new biomarker for risk stratification and tailoring therapies in patients with cardiovascular disease.
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Affiliation(s)
- Dominik Rath
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | | | - David Heinzmann
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Manuel Sigle
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Mona Monzien
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Katja Horstmann
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Elke Schaeffeler
- Dr. Margarete-Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Stefan Winter
- Dr. Margarete-Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
| | - Karin Müller
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Patrick Groga-Bada
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Monika Zdanyte
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Oliver Borst
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Alma Zernecke
- Institute of Experimental Biomedicine, University Hospital Würzburg, Würzburg, Germany
| | - Meinrad Gawaz
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Peter Martus
- Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany
| | - Matthias Schwab
- Dr. Margarete-Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tübingen, Tübingen, Germany
- Department of Clinical Pharmacology, University Hospital Tübingen, Tübingen, Germany
- Department of Pharmacy and Biochemistry, University of Tübingen, Tübingen, Germany
| | - Tobias Geisler
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
| | - Peter Seizer
- Department of Cardiology, University Hospital Tübingen, Tübingen, Germany
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Hou C, Wang F, Liu X, Chang G, Wang F, Geng X. Comprehensive Analysis of Interaction Networks of Telomerase Reverse Transcriptase with Multiple Bioinformatic Approaches: Deep Mining the Potential Functions of Telomere and Telomerase. Rejuvenation Res 2017; 20:320-333. [PMID: 28281877 DOI: 10.1089/rej.2016.1909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Telomerase reverse transcriptase (TERT) is the protein component of telomerase complex. Evidence has accumulated showing that the nontelomeric functions of TERT are independent of telomere elongation. However, the mechanisms governing the interaction between TERT and its target genes are not clearly revealed. The biological functions of TERT are not fully elucidated and have thus far been underestimated. To further explore these functions, we investigated TERT interaction networks using multiple bioinformatic databases, including BioGRID, STRING, DAVID, GeneCards, GeneMANIA, PANTHER, miRWalk, mirTarBase, miRNet, miRDB, and TargetScan. In addition, network diagrams were built using Cytoscape software. As competing endogenous RNAs (ceRNAs) are endogenous transcripts that compete for the binding of microRNAs (miRNAs) by using shared miRNA recognition elements, they are involved in creating widespread regulatory networks. Therefore, the ceRNA regulatory networks of TERT were also investigated in this study. Interestingly, we found that the three genes PABPC1, SLC7A11, and TP53 were present in both TERT interaction networks and ceRNAs target genes. It was predicted that TERT might play nontelomeric roles in the generation or development of some rare diseases, such as Rift Valley fever and dyscalculia. Thus, our data will help to decipher the interaction networks of TERT and reveal the unknown functions of telomerase in cancer and aging-related diseases.
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Affiliation(s)
- Chunyu Hou
- 1 Department of Biochemistry and Molecular Biology, Tianjin Medical University , Tianjin, China .,2 Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital , Tianjin, China
| | - Fei Wang
- 3 Department of Neurology, Tianjin Medical University , Tianjin, China
| | - Xuewen Liu
- 1 Department of Biochemistry and Molecular Biology, Tianjin Medical University , Tianjin, China
| | - Guangming Chang
- 4 Department of Clinical Laboratory, General Hospital, Tianjin Medical University , Tianjin, China
| | - Feng Wang
- 5 Department of Genetics, Tianjin Medical University , Tianjin, China
| | - Xin Geng
- 1 Department of Biochemistry and Molecular Biology, Tianjin Medical University , Tianjin, China .,6 Tianjin Key Laboratory of Cellular and Molecular Immunology, Tianjin Medical University , Tianjin, China .,7 Key Laboratory of Educational Ministry of China, Tianjin Medical University , Tianjin, China
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