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Sorokina A, Artyuhov A, Goltsova A, Dashinimaev E. Detection of CCR5Δ32 Mutant Alleles in Heterogeneous Cell Mixtures Using Droplet Digital PCR. Front Mol Biosci 2022; 9:805931. [PMID: 35265670 PMCID: PMC8898955 DOI: 10.3389/fmolb.2022.805931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 01/10/2022] [Indexed: 01/05/2023] Open
Abstract
The C-C chemokine receptor type 5 (CCR5 or CD195) is one of the co-receptor binding sites of the human immunodeficiency virus (HIV). Transplantations of hematopoietic stem cells with the CCR5Δ32 knockout mutation could represent an effective tool for the complete cure of HIV; these methods having passed the stage of proof-of-principle. At the same time, using the modern CRISPR/Cas9 genome editing method, we can effectively reproduce the CCR5Δ32 mutation in any wild-type cells. Thus, the task of searching for and accurately quantifying the content of mutant CCR5Δ32 alleles in heterogeneous cell mixtures becomes relevant. In this study, we describe the generation of an artificial CCR5Δ32 mutation using CRISPR/Cas9 followed by multiplex droplet digital polymerase chain reaction (ddPCR) to quantify its content in cell mixtures. The system we have developed allows us to quickly and accurately measure the content of cells with the CCR5Δ32 mutation, down to 0.8%.
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Affiliation(s)
- Alyona Sorokina
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Alexander Artyuhov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | | | - Erdem Dashinimaev
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Moscow, Russia
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
- Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia
- *Correspondence: Erdem Dashinimaev,
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Vieira-Filho DRM, Amarante MK, Ishibashi CM, Ariza CB, Vitiello GAF, de Oliveira KB, Guembarovski RL, Watanabe MAE. CCR5 and CXCL12 allelic variants: Possible association with childhood neuroblastoma susceptibility? J Neuroimmunol 2020; 342:577193. [PMID: 32145532 DOI: 10.1016/j.jneuroim.2020.577193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 02/13/2020] [Accepted: 02/13/2020] [Indexed: 01/26/2023]
Abstract
Neuroblastoma (NB) is a heterogeneous and particularly malignant childhood neoplasm in its higher stages, prone to form metastasis in selected organs and for which there is still no efficient treatment available beyond surgery. Evidence indicates that chemokines and their receptors present involvement as mediators of neuroinflammation and have a neurophysiological role. In the present study, we aimed to verify if CCR5 (rs333) and CXCL12 (rs1801157) allelic variants were associated with NB. For CCR5 (rs333) D32 carriers (OR: 5.96, IC: 2.21-16.06) and for CXCL12 genotype 3'A/3'A (OR:26.18, IC:6.15-111.4) there were statistically significant differences as well to allelic frequency (OR:4.20, IC: 2.19-8.03). Although no correlation was verified regarding prognostic parameters for both CCR5 and CXCL12 polymorphic variants, these polymorphisms may be associated with NB susceptibility which deserve attention for future investigations.
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Affiliation(s)
| | - Marla Karine Amarante
- Laboratory of DNA Polymorphisms and Immunology, Department of Pathological Sciences, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil.
| | - Cyntia Mayumi Ishibashi
- Laboratory of DNA Polymorphisms and Immunology, Department of Pathological Sciences, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil
| | | | - Glauco Akelinghton Freire Vitiello
- Laboratory of DNA Polymorphisms and Immunology, Department of Pathological Sciences, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil
| | - Karen Brajão de Oliveira
- Laboratory of Molecular Genetics and Immunology, Department of Pathological Sciences, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil
| | - Roberta Losi Guembarovski
- Department of General Biology, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil
| | - Maria Angelica Ehara Watanabe
- Laboratory of DNA Polymorphisms and Immunology, Department of Pathological Sciences, Biological Sciences Center, Londrina State University, Londrina, PR, Brazil
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Bauer O, Milenkovic VM, Hilbert S, Sarubin N, Weigl J, Bahr LM, Wetter TC, Heckel B, Wetzel CH, Rupprecht R, Nothdurfter C. Association of Chemokine (C-C Motif) Receptor 5 and Ligand 5 with Recovery from Major Depressive Disorder and Related Neurocognitive Impairment. Neuroimmunomodulation 2020; 27:152-162. [PMID: 33503626 PMCID: PMC8006585 DOI: 10.1159/000513093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/01/2020] [Indexed: 12/28/2022] Open
Abstract
INTRODUCTION Inflammatory processes play an important role in the pathophysiology of major depressive disorder (MDD), but their relevance for specific symptoms such as neurocognitive impairment is rarely investigated. METHODS In this observational study, we investigated the changes of leukocyte chemokine (C-C motif) receptor 5 (CCR5) and ligand 5 (CCL5) mRNA levels and inflammatory cytokines in 60 MDD patients before (PRE) and after 5 weeks (W5) of antidepressive treatment in relation to therapy response and alterations in cognitive functions by means of the Cambridge Neuropsychological Test Automated Battery (CANTAB). We hypothesized that elevated CCR5 and CCL5 levels in depressed patients would decrease upon treatment and could differ with regard to cognitive impairment associated with MDD. RESULTS Both CCR5 and CCL5 levels were significantly decreased in the responder group compared to nonresponders even before treatment. The cytokine IL-6 as a marker of inflammation in depression did not show a difference before treatment in future responders versus nonresponders, but decreased significantly upon antidepressive therapy. Regarding neurocognitive impairment in MDD patients, an increased misperception of the emotion "anger" after 5 weeks of treatment proved to be associated with a more pronounced change in CCR5, and the perception of the emotion "disgust" became faster along with a stronger decrease in CCL5 over the same time. Executive functions typically impaired in MDD patients were not markedly associated with alterations in CCR5/CCL5. DISCUSSION CCR5 and CCL5 are important in the targeting of immune cells by HIV. This is the first study providing valuable hints that both CCR5 and CCL5 might also serve as markers of therapy response prediction in MDD. Regarding neurocognitive impairment in depression, CCR5 and CCL5 did not reveal characteristic changes upon MDD treatment such as executive functions, which are probably delayed. However, changes of emotional perception appear to be an earlier responding feature.
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Affiliation(s)
- Olivia Bauer
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Vladimir M Milenkovic
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Sven Hilbert
- Faculty of Human Sciences, University of Regensburg, Regensburg, Germany
| | - Nina Sarubin
- Hochschule Fresenius, University of Applied Sciences, Munich, Germany
- Department of Psychology, Psychological Methods and Assessment, Ludwig-Maximilians-Universität, Munich, Germany
| | - Johannes Weigl
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Lisa-Marie Bahr
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Thomas C Wetter
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Barbara Heckel
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Christian H Wetzel
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Rainer Rupprecht
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Caroline Nothdurfter
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany,
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Avanzi VM, Vicente BA, Beloto NCP, Gomes-da-Silva MM, Ribeiro CEL, Tuon FF, Vidal LRR, Nogueira MB, Raboni SM. Profile of HIV subtypes in HIV/HBV- and HIV/HCV-coinfected patients in Southern Brazil. Rev Soc Bras Med Trop 2017; 50:470-477. [PMID: 28954067 DOI: 10.1590/0037-8682-0450-2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 06/30/2017] [Indexed: 01/25/2023] Open
Abstract
INTRODUCTION: HIV and viral hepatitis infections are major causes of chronic disease worldwide and have some similarities with regard to routes of transmission, epidemiology, front barriers faced during access of treatment, and strategies for a global public health response. The objective was to describe the HIV-1 subtypes, viral tropism and single-nucleotide polymorphisms (SNPs) of interleukin 28B (IL28B) from a case series of HIV/viral hepatitis coinfected patients from southern Brazil. METHODS: Clinical and epidemiological data were evaluated by a review of medical records. Periodic blood draws were taken to determine the viral and host characteristics. RESULTS: This study included 38 patients with HIV/HBV or HIV/HCV coinfection; the median age was 49 years. Thirty-seven (97.4%) were on antiretroviral therapy, 32 (84.2%) had an undetectable viral load, a median CD4+ T-cell count of 452 cells/mm3. HIV-1 subtyping showed 47.4 and 31.6% of patients with subtypes C and B, respectively. Analysis of viral co-receptor usage showed a predominance of the R5 variant (64.7%), with no significant difference between the subtypes. Twenty patients with HIV/HCV coinfection were eligible to receive HCV therapy with pegylated-interferon-alpha plus ribavirin, and 10/20 (50%) of them achieved sustained virological response. SNPs of IL28B were evaluated in 93.3% of patients with HIV/HCV coinfection, and 17 (60.7%) presented the CC genotype. CONCLUSIONS: In the present case series, a higher frequency of HIV subtype C was found in coinfected patients. However such findings need to be prospectively evaluated with the inclusion of data from regional multicenter analyses.
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Affiliation(s)
- Valéria Miranda Avanzi
- Programa de Pós Graduação em Medicina Interna, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | - Bianca Arão Vicente
- Departamento de Doenças Infecciosas, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | | | | | - Clea Elisa Lopes Ribeiro
- Departamento de Doenças Infecciosas, Universidade Federal do Paraná, Curitiba, PR, Brasil
- Secretaria Municipal de Saúde de Curitiba, Divisão Epidemiologica, Curitiba, PR, Brasil
| | - Felipe Francisco Tuon
- Programa de Pós Graduação em Medicina Interna, Universidade Federal do Paraná, Curitiba, PR, Brasil
- Departamento de Doenças Infecciosas, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | | | | | - Sonia Mara Raboni
- Programa de Pós Graduação em Medicina Interna, Universidade Federal do Paraná, Curitiba, PR, Brasil
- Departamento de Doenças Infecciosas, Universidade Federal do Paraná, Curitiba, PR, Brasil
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Silva-Carvalho WHV, de Moura RR, Coelho AVC, Crovella S, Guimarães RL. Frequency of the CCR5-delta32 allele in Brazilian populations: A systematic literature review and meta-analysis. INFECTION GENETICS AND EVOLUTION 2016; 43:101-7. [PMID: 27208805 DOI: 10.1016/j.meegid.2016.05.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 05/13/2016] [Accepted: 05/16/2016] [Indexed: 11/29/2022]
Abstract
The CCR5 is a chemokine receptor widely expressed by several immune cells that are engaged in inflammatory responses. Some populations have individuals exhibiting a 32bp deletion in the CCR5 gene (CCR5-delta32) that produces a truncated non-functional protein not expressed on the cell surface. This polymorphism, known to be associated with susceptibility to infectious and inflammatory diseases, such as osteomyelitis, pre-eclampsia, systemic lupus erythematous, juvenile idiopathic arthritis, rheumatoid arthritis and HIV/AIDS, is more commonly found in European populations with average frequency of 10%. However, it is also possible to observe a significant frequency in other world populations, such as the Brazilian one. We performed a systematic review and meta-analysis of CCR5-delta32 genetic association studies in Brazilian populations throughout the country to estimate the frequency of this polymorphism. We also compared CCR5-delta32 frequencies across Brazilian regions. The systematic literature reviewed studies involving delta32 allele in Brazilian populations published from 1995 to 2015. Among the reviewed literature, 25 studies including 30 Brazilian populations distributed between the North, Northeast, South and Southeast regions were included in our meta-analysis. We observed an overall allelic frequency of 4% (95%-CI, 0.03-0.05), that was considered moderate and, notably, higher than some European populations, such as Cyprus (2.8%), Italy (3%) and Greece (2.4%). Regarding the regional frequency comparisons between North-Northeast (N-NE) and South-Southeast (S-SE) regions, we observed an allelic frequency of 3% (95%-CI, 0.02-0.04) and 4% (95%-CI, 0.03-0.05), respectively. The populations from S-SE regions had a slightly higher CCR5-delta32 frequency than N-NE regions (OR=1.41, p=0.002). Although there are several studies about the CCR5-delta32 polymorphism and its effect on the immune response of some infectious diseases, this report is the first meta-analysis study that provides a descriptive study of the distribution of CCR5-delta32 allele in Brazilian population.
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Affiliation(s)
| | - Ronald Rodrigues de Moura
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Antonio Victor Campos Coelho
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Sergio Crovella
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
| | - Rafael Lima Guimarães
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil; Department of Genetics, Federal University of Pernambuco - UFPE, Recife, Pernambuco, Brazil
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Henrich TJ, Hanhauser E, Hu Z, Stellbrink HJ, Noah C, Martin JN, Deeks SG, Kuritzkes DR, Pereyra F. Viremic control and viral coreceptor usage in two HIV-1-infected persons homozygous for CCR5 Δ32. AIDS 2015; 29:867-76. [PMID: 25730507 DOI: 10.1097/qad.0000000000000629] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVES To determine viral and immune factors involved in transmission and control of HIV-1 infection in persons without functional CCR5. DESIGN Understanding transmission and control of HIV-1 in persons homozygous for CCR5(Δ32) is important given efforts to develop HIV-1 curative therapies aimed at modifying or disrupting CCR5 expression. METHODS We identified two HIV-infected CCR5(Δ32/Δ32) individuals among a cohort of patients with spontaneous control of HIV-1 infection without antiretroviral therapy and determined coreceptor usage of the infecting viruses. We assessed genetic evolution of full-length HIV-1 envelope sequences by single-genome analysis from one participant and his sexual partner, and explored HIV-1 immune responses and HIV-1 mutations following virologic escape and disease progression. RESULTS Both participants experienced viremia of less than 4000 RNA copies/ml with preserved CD4(+) T-cell counts off antiretroviral therapy for at least 3.3 and 4.6 years after diagnosis, respectively. One participant had phenotypic evidence of X4 virus, had no known favorable human leukocyte antigen alleles, and appeared to be infected by minority X4 virus from a pool that predominately used CCR5 for entry. The second participant had virus that was unable to use CXCR4 for entry in phenotypic assay but was able to engage alternative viral coreceptors (e.g., CXCR6) in vitro. CONCLUSION Our study demonstrates that individuals may be infected by minority X4 viruses from a population that predominately uses CCR5 for entry, and that viruses may bypass traditional HIV-1 coreceptors (CCR5 and CXCR4) completely by engaging alternative coreceptors to establish and propagate HIV-1 infection.
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Absence of Association between CCR5 rs333 Polymorphism and Childhood Acute Lymphoblastic Leukemia. Adv Hematol 2014; 2014:924030. [PMID: 24822066 PMCID: PMC4009163 DOI: 10.1155/2014/924030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 03/19/2014] [Accepted: 03/21/2014] [Indexed: 12/28/2022] Open
Abstract
Acute lymphoblastic leukemia (ALL) is a malignant disorder that originates from one single hematopoietic precursor committed to B- or T-cell lineage. Ordinarily, these cells express CCR5 chemokine receptor, which directs the immune response to a cellular pattern and is involved in cancer pathobiology. The genetic rs333 polymorphism of CCR5 (Δ32), results in a diminished receptor expression, thus leading to impaired cell trafficking. The objective of the present study was to investigate the effect of CCR5 chemokine receptor rs333 polymorphism in the pathogenesis of ALL. The genotype distribution was studied in 79 patients and compared with 80 control subjects, in a childhood population of Southern Brazil. Genotyping was performed using DNA samples amplified by polymerase chain reaction with sequence-specific primers (PCR-SSP). The homozygous (Δ32/Δ32) deletion was not observed in any subject involved in the study. Heterozygous genotype was not associated with ALL risk (OR 0.7%; 95% CI 0.21–2.32; P > 0.05), nor recurrence status of ALL (OR 0.86; 95% CI 0.13–5.48; P > 0.05). This work demonstrated, for the first time, no significant differences in the frequency of the CCR5/Δ32 genotype between ALL and control groups, indicating no effect of this genetic variant on the ALL susceptibility and recurrence risk.
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RIBAS ADRIANADANMVOLF, RIBAS REJANECRISTINA, DA SILVA WALDIRVERÍSSIMO, ARISTIDES SANDRAMARAALESSI, LONARDONI MARIAVALDRINEZCAMPANA, WATANABE MARIAANGÉLICAEHARA, BORELLI SUELIDONIZETE, SILVEIRA THAÍSGOMESVERZIGNASSI. Effect of the chemokine receptor CCR5 in the development of American cutaneous leishmaniasis in a Southern Brazilian population. Mol Med Rep 2013; 8:189-94. [DOI: 10.3892/mmr.2013.1452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 04/02/2013] [Indexed: 11/05/2022] Open
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Galván CA, Elbarcha OC, Fernández EJ, Beltramo DM, Soria NW. Distribution of polymorphisms in cytochrome P450 2B6, histocompatibility complex P5, chemokine coreceptor 5, and interleukin 28B genes in inhabitants from the central area of Argentina. Genet Test Mol Biomarkers 2012; 16:130-3. [PMID: 21854194 DOI: 10.1089/gtmb.2011.0058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
AIMS The selection of the most appropriate treatment for several diseases relies on a number of factors such as environment, age, gender, and nutrition. Additionally, the contribution of different genetic polymorphisms to treatment efficacy has been largely recognized. The lack of information on the pharmacogenetic profile of our population prompted us to analyze the frequency of polymorphisms known to be relevant to achieve treatment efficacy with different therapeutic agents in viral infectious diseases, such as Hepatitis C and AIDS. RESULTS The allelic frequencies for the wild-type variant of the genes analyzed were cytochrome P450 2B6 (CYP2B6; rs3745274; 516G) 0.618 (95% confidence interval [CI]: 0.523, 0.711), chemokine coreceptor 5 (CCR5; rs333) 0.961 (95% CI: 0.942, 0.98), histocompatibility complex P5 (HCP5; rs2395029; 335T) 0.971 (95% CI: 0.937, 1), and interleukin 28B (IL28B; rs12979860; 12007005C) 0.656 (95% CI: 0.564, 0.747), respectively. CONCLUSIONS Our data indicate that the genetic profile of the population studied is similar to that reported for other Caucasian populations, with only slight differences for CYP2B6. Noteworthy, the considerable number of patients carrying CYP2B6 (516T) and IL28B (12007005T) alleles underlies the importance of considering pharmacogenetic testing before starting drug therapy protocols to prevent toxicity and/or lack of effectiveness in AIDS or hepatitis C virus infections.
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Singh N, Sinha N, Kumar S, Pandey CM, Agrawal S. Polymorphism in chemokine receptor genes and risk of acute myocardial infarction in North Indian population. Mol Biol Rep 2011; 39:2753-9. [PMID: 21744265 DOI: 10.1007/s11033-011-1031-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 06/03/2011] [Indexed: 01/22/2023]
Abstract
Chemokines regulates the trafficking of leukocytes to the site of inflammation hence may be implicated in cardiac events. Currently no consistent effects have been revealed their role in acute myocardial infarction (MI). The aim of current study was to investigate the impact of human chemokine receptor genetic variants, CCR5-Δ32 insertion/deletion, CCR5-59029-A/G, CX3CR1-V249I and CX3CR1-T280 M on acute MI. 230 acute MI and 300 controls were examined. Patients carrying CCR5-Δ32 genotype were at three times higher risk of developing MI odds ratio (OR, 3.24, CI 1.127-9.356, P = 0.04). Significant association was found with risk of acute MI in recipients who possessed homozygous 59029-A allele (OR 1.47, CI 1.03-2.09, P = 0.03). While CX3CR1-I249 and M280 were found to be protective in MI patients with OR 0.46, CI 0.32-0.66, P < 0.0001 and OR 0.36, CI 0.24-0.55, P < 0.0001, respectively. It might be possible that risk of acute MI is associated with genetic variation in chemokine receptors, i.e., CCR5 and CX3CR1.
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Affiliation(s)
- Neha Singh
- Department of Cardiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, 226014 Uttar Pradesh, India.
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Gonzalez G, Park S, Chen D, Armitage S, Shpall E, Behringer R. Identification and frequency of CCR5Δ32/Δ32 HIV-resistant cord blood units from Houston area hospitals. HIV Med 2011; 12:481-6. [PMID: 21375684 DOI: 10.1111/j.1468-1293.2010.00911.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The use of umbilical cord blood (CB) that is genetically resistant to HIV infection has been proposed as a novel stem cell therapy for the treatment of patients with AIDS. These genetically unique CB units (CBUs) should be present in public CB banks at a predicted frequency. METHODS The chemokine (C-C motif) receptor 5 (CCR5) genotypes of CBUs donated to the M. D. Anderson CB Bank by four Houston area hospitals were determined by polymerase chain reaction (PCR) and DNA sequencing. RESULTS The frequency of CCR5Δ32/Δ32 CBUs was consistent with the frequency of the CCR5Δ32 allele in human populations, and was apparently dependent on the ethnic population of the parents of the newborns from whom the CBUs were collected. CONCLUSIONS Routine genotyping to identify HIV-resistant CBUs could create a bank of CB-derived stem/progenitor cells with which to treat HIV infection.
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Affiliation(s)
- G Gonzalez
- Genes and Development Graduate Program, University of Texas Graduate School of Biomedical Sciences at Houston, USA
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Association of chemokines receptor (CCR5 Delta32) in idiopathic recurrent miscarriages among north Indians. Arch Gynecol Obstet 2008; 280:229-34. [PMID: 19116725 DOI: 10.1007/s00404-008-0901-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 12/11/2008] [Indexed: 10/21/2022]
Abstract
PURPOSE Human reproduction is a complex process involving multiple factors for the success of pregnancy. Chemokines are one of the immunomodulators which may determine pregnancy outcome. In the present study, we have tested genetic association between CCR5 Delta32 polymorphism and idiopathic recurrent miscarriages (IRM) among north Indians. METHODS Two hundred patients and 300 age, sex and ethnically matched controls were genotyped for CCR5 Delta32 polymorphism, genotype and allele frequencies were compared in both the groups. RESULTS IRM patients had a three times higher (5.5 vs. 1.7%) frequency of heterozygote genotype (P = 0.0335, OR = 3.43; 95% CI = 1.17-10.04). Allele frequency in IRM patients was 3.7 and 0.83% among controls and the differences were statistically significant (P = 0.0349, OR = 3.37; 95% CI = 1.16-9.76). CONCLUSIONS Our results demonstrated that it had a higher frequency of CCR5 Delta32 at allelic level suggesting a possible susceptibility trend (OR = 3.43) and CCR5 Delta32 may be a potential genetic risk factor for IRM.
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