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TAS2R38 苦味受体表型和单倍型在 COVID-19 患者中的分布。

Distribution of TAS2R38 bitter taste receptor phenotype and haplotypes among COVID-19 patients.

机构信息

Tate & Lyle PLC, 5 Marble Arch, London, W1H 7EJ, UK.

Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Via Mangiagalli 31, 20133, Milan, Italy.

出版信息

Sci Rep. 2022 May 5;12(1):7381. doi: 10.1038/s41598-022-10747-2.

Abstract

Bitter taste receptor TAS2R38 is expressed in the respiratory tract and can respond to quorum-sensing molecules produced by pathogens, stimulating the release of nitric oxide, with biocidal activity. TAS2R38 presents two main high-frequency haplotypes: the "taster" PAV and the "non-taster" AVI. Individuals carrying the AVI allele could be at greater risk of infections, including SARS-CoV-2. The aim of this study was to assess the frequency of PAV and AVI alleles in COVID-19 patients with severe or non-severe symptoms compared to healthy subjects to further corroborate, or not, the hypothesis that the PAV allele may act as a protecting factor towards SARS-CoV-2 infection while the AVI one may represent a risk factor. After careful selection, 54 individuals were included in the study and underwent genetic analysis and PROP phenotype assessment. Our investigation could not point out at a significant relationship between single nucleotide polymorphisms responsible for PROP bitterness and presence/severity of SARS-CoV-2 infection, as previous studies suggested. Our results uncouple the direct genetic contribution of rs10246939, rs1726866 and rs713598 on COVID-19, calling for caution when proposing a treatment based on TAS2R38 phenotypes.

摘要

苦味受体 TAS2R38 表达于呼吸道,并能对病原体产生的群体感应分子做出反应,刺激一氧化氮的释放,具有杀菌活性。TAS2R38 存在两种主要的高频单倍型:“味觉者”PAV 和“非味觉者”AVI。携带 AVI 等位基因的个体感染的风险可能更高,包括 SARS-CoV-2。本研究旨在评估重症或非重症 COVID-19 患者与健康受试者之间 PAV 和 AVI 等位基因的频率,以进一步证实或否定 PAV 等位基因可能作为 SARS-CoV-2 感染的保护因素,而 AVI 等位基因可能是危险因素的假设。经过仔细选择,共有 54 名个体纳入研究并接受了基因分析和 PROP 表型评估。我们的研究结果并未如先前研究所述,指出负责 PROP 苦味的单核苷酸多态性与 SARS-CoV-2 感染的存在和严重程度之间存在显著关系。我们的结果表明,rs10246939、rs1726866 和 rs713598 对 COVID-19 的直接遗传贡献被解除关联,在提出基于 TAS2R38 表型的治疗方案时应谨慎。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f831/9072410/8e55dea850f8/41598_2022_10747_Fig1_HTML.jpg

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