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Objective: Recent studies have suggested that diminished Ccr5 functioning has an effect on synaptic plasticity and hippocampal memory in mouse models. CCR5-delta32, a 32-bp frameshift deletion in human CCR5 encoding a nonfunctional receptor, has been reported to have a protective effect against human immunodeficiency virus infection but its role as a modifier of neurodegenerative disease has been minimally explored. We investigated whether the CCR5-delta32 polymorphism could have an effect in the context of human neurodegenerative diseases.
Methods: We examined the frequency of the CCR5-delta32 polymorphism in a large and well-characterized cohort including 1425 patients with neurodegenerative dementias and 2032 controls.
Results: We did not observe a significant association between the CCR5-delta32 polymorphism and any of the neurodegenerative diseases screened in this study. However, we observed an earlier age of onset among neurodegenerative disease patients carrying the CCR5-delta32 allele.
Conclusions: Although our findings were inconclusive, the earlier age of onset observed among neurodegenerative disease patients carrying the CCR5-delta32 allele suggests that the deletion may have a detrimental effect in the context of neurodegeneration.
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http://dx.doi.org/10.1097/WAD.0000000000000367 | DOI Listing |
Biology (Basel)
May 2025
Dipartimento di Medicina, Chirurgia e Farmacia, University of Sassari, Clinica Medica, Viale San Pietro 8, 07100 Sassari, Italy.
Background: Despite the high transmissibility of SARS-CoV-2, some individuals remain uninfected despite prolonged exposure to a high viral load, suggesting the involvement of an innate resistance mechanism, possibly underpinned by the host's genetic factors. The angiotensin-converting enzyme-1 (), , and C-C Chemokine Receptor 5 () polymorphisms have been shown to influence susceptibility to the infection. In this study, the role of , , and gene polymorphisms in modulating susceptibility to SARS-CoV-2 infection within the context of intimate contact was evaluated.
View Article and Find Full Text PDFChronic Stress (Thousand Oaks)
June 2025
Departments of Neurology, Psychiatry and Radiology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
Background: Up to 25% of stroke survivors develop post-traumatic stress disorder (PTSD) symptoms, yet the predisposing factors remain largely unknown. The C-C-Chemokine receptor-5 gene (CCR5) loss-of-function mutation (LOFM, CCR5-Δ32) has been identified as a protective factor against post-stroke depression. This study investigates whether CCR5-Δ32 also confers protection against post-stroke PTSD, in conjunction with two additional polymorphisms: the 5-HTTLPR in the serotonin transporter gene and the BDNF Val66Met variant.
View Article and Find Full Text PDFAIDS Res Ther
May 2025
Centro de Investigação em Saúde de Angola (CISA)|Instituto Nacional de Investigação em Saúde (INIS), Luanda, Angola.
Background: The HIV/AIDS pandemic remains a public health concern. Studies on host genetic polymorphisms that confer resistance to HIV-1 infection or delay HIV disease progression are scarce in African countries. Herein, we investigate the proportion of the mutated phenotype of the AIDS-related polymorphisms CCR5-Delta32, CCR2-64I, and SDF1-3'A in HIV-infected and uninfected individuals in Luanda, the capital of Angola, a sub-Saharan African country.
View Article and Find Full Text PDFDiscov Med
November 2024
Department of Medical Lab Technology, Prince Fahad Bin Sultan Chair for Biomedical Research, Faculty of Applied Medical Sciences, University of Tabuk, 71491 Tabuk, Saudi Arabia.
Life (Basel)
July 2024
Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Prince Fahad Bin Sultan Chair for Biomedical Research, University of Tabuk, Tabuk 71491, Saudi Arabia.
Unlabelled: PCOS is a heterogeneous, multifactorial endocrine disorder with a complex pathophysiology. It is a globally rising infertility disorder that affects a large percentage of women of reproductive age, with a relatively high prevalence of 8-13%. Genome-wide association studies have revealed associations of genetic variations with many diseases, including PCOS.
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