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Correspondence to Author: Takyuki, Yorisaki. 

Department of Medical Genetics, National Cerebral and Cardiovascular Center, Osaka, Japan

Abstract:

The retrovirus known as the human immunodeficiency virus (HIV) has a positive sense single strand RNA genome. Essential regulatory elements (Tat and Rev), auxiliary proteins (Gag, Env, and Pol), and viral structural proteins are all translated from the viral genome.Nef, Vpr, Vif, and Vpu are regulatory proteins [1,2]. During the 1900s, there were theories that HIV originated in nonhuman primates and spread to humans by bodily fluids such blood, semen, vaginal or rectal fluids, and breast milk. Using host receptor proteins, such as CD4 and either CC-chemokine receptor 5 (CCR) or CXC-chemokine receptor 4 (CXCR4), HIV is internalized by host cells. Therefore, HIV primarily targets CD4+ T cells and, by disarming the host immune system, can cause acquired immune deficiency syndrome (AIDS) [3,4].Toll-like receptors (TLRs), RIG-Ilike receptors (RLRs), and NOD-like receptors (NLRs) are examples of pattern recognition receptors (PRRs) that identify a pathogen-related pattern of external invaders and trigger the host immune system through downstream regulators, such as nuclear factor kappa-light-chain-enhancer, in order to prevent external infection.of interferon type I, mitogenactivated protein kinase (MAPK), and activated B cells (NF-κB) [5–9]. TLR4 on the cell surface was found to be increased in monocyte-derived macrophages (MDM) in response to HIV-1 infection, according to a prior study. and mononuclear cells of the peripheral blood (PBMC) [10]. Furthermore, HIV-1’s Tat protein binds directly to TLR4 and triggers the activation of interleukin-10 (IL-10) and tumor necrosis factor-α (TNF-α) [11]. According to these findings, TLR4 and HIV infection are related. In vitro, TLR4 activation remarkably prevents HIV infection from CD4+ T cells [12]. Furthermore, the rs4986790 single nucleotide polymorphism (SNP) (D299G), a functional variant of TLR4, raises the incidence of HIV-1 infection in the Indian population [13].We gathered three studies that include genetic data on ethnic origins and allele frequencies of the TLR4 gene’s rs4986790 SNP from HIV-infected individuals in order to confirm whether the SNP is linked to vulnerability to HIV-1 infection [14–16]. The corresponding white control groups, which included northern and western Europeans from Utah, Tuscans from Italy, and Iberian people from Spain, were utilized for an association study after being acquired from the 1000 Genomes Project [17]. Next, we gathered information from relevant papers and conducted a metaanalysis to assess the relationship between HIV-1 infection susceptibility and the TLR4 gene’s rs4986790 SNP.A PubMed literature search was done to find papers that reported the TLR4 gene’s rs4986790 SNP. The following keywords were used in the search: “Polymorphism” or “susceptibility” in conjunction with “TLR4”, “SNP,” and “HIV” (the last search The update was completed on July 18, 2020. Following the initial screening of abstracts and titles, reports that were deemed irrelevant were eliminated. Studies that meet the following inclusion requirements are eligible: (1) looking into the relationship between rs4986790 and HIV-1; (2) a casecontrol or cohort research; (3) genetic data on rs4986790 of patients infected with HIV-1, (4) in full text; and (5) published in English. The following were the criteria for exclusion: (1) animal research; (2) reviews or case reports; and (3) lacking adequate genetic information.

Citation:

Dr.Takyuki, Hereditary Big Vessel Disease Genetics. World Journal of Human Genetics 2025.