Quantitative Assessment of T-Regulatory Cell Population and FOXP3 Gene Expression in Chronically Exposed Residents of the Urals Region

IF 0.8 4区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY
A. I. Kotikova, V. S. Nikiforov, E. A. Blinova, A. V. Akleyev
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Abstract

The objective is to conduct a pilot study on the quantity of regulatory T-cells (Treg) in the peripheral blood and to assess transcriptional activity of FOXP3 gene in chronically exposed persons. Materials and methods. The study included 77 participants who were divided into two groups: exposed people—45 individuals, with a mean cumulative dose to red bone marrow (RBM) of 641.21 ± 80.41 mGy, and a comparison group—32 individuals, with a mean cumulative RBM dose of 20.38 ± 2.51 mGy. The study on the assessment of the FOXP3 gene expression was conducted in 298 individuals: the exposed group consisted of 163 individuals with a mean cumulative dose to RBM of 702 ± 43.10 mGy; the comparison group included 135 individuals with a mean cumulative dose to RBM of 17.30 ± 1.40 mGy. The study groups did not differ significantly in age, sex, and ethnicity. Quantitative assessment of regulatory T-cells in the peripheral blood was performed using flow cytometry method by the presence of T-helper markers CD3 and CD4, high expression of marker CD25 and low expression of marker CD127. Thus, the phenotype of regulatory T-lymphocytes was described as CD3+CD4+CD25highCD127low. The relative mRNA content of the FOXP3 gene was assessed by PCR-RT. Results. More than 70 years after the onset of chronic exposure, no statistically significant changes in the pool of regulatory T-cells were detected in the exposed persons: the content of absolute and relative number of Treg did not differ statistically significantly between the studied groups (p = 0.91 and p = 0.29, respectively); no statistically significant relationship between Treg indices and the cumulative doses to RBM and thymus and peripheral lymphoid organs were found. No statistically significant differences in FOXP3 gene mRNA expression were found between exposed individuals and the comparison group. A linear positive dependence of FOXP3 gene mRNA expression on the relative number of regulatory T-cells was shown (p = 0.007).

乌拉尔地区长期暴露居民t -调节细胞群和FOXP3基因表达的定量评估
目的是对慢性暴露者外周血中调节性t细胞(Treg)的数量进行初步研究,并评估FOXP3基因的转录活性。材料和方法。该研究包括77名参与者,他们被分为两组:暴露者- 45人,红骨髓平均累积剂量(RBM)为641.21±80.41 mGy,对照组- 32人,平均累积RBM剂量为20.38±2.51 mGy。对298例个体进行FOXP3基因表达评估研究:暴露组163例,平均累积剂量为702±43.10 mGy;对照组135人,平均累计剂量为17.30±1.40毫戈瑞。研究小组在年龄、性别和种族方面没有显著差异。通过t辅助标记CD3和CD4、标记CD25高表达和标记CD127低表达,流式细胞术方法对外周血调节性t细胞进行定量评估。因此,调节性t淋巴细胞的表型被描述为CD3+CD4+CD25highCD127low。采用PCR-RT检测FOXP3基因的相对mRNA含量。结果。慢性暴露后70年以上,暴露者调节性t细胞池变化无统计学意义,Treg的绝对含量和相对数量组间差异无统计学意义(p = 0.91和p = 0.29);Treg指数与RBM、胸腺和周围淋巴器官累积剂量之间无统计学意义的关系。暴露个体与对照组FOXP3基因mRNA表达差异无统计学意义。FOXP3基因mRNA的表达与调节性t细胞的相对数量呈线性正相关(p = 0.007)。
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来源期刊
Doklady Biochemistry and Biophysics
Doklady Biochemistry and Biophysics 生物-生化与分子生物学
CiteScore
1.60
自引率
12.50%
发文量
68
审稿时长
6-12 weeks
期刊介绍: Doklady Biochemistry and Biophysics is a journal consisting of English translations of articles published in Russian in biochemistry and biophysics sections of the Russian-language journal Doklady Akademii Nauk. The journal''s goal is to publish the most significant new research in biochemistry and biophysics carried out in Russia today or in collaboration with Russian authors. The journal accepts only articles in the Russian language that are submitted or recommended by acting Russian or foreign members of the Russian Academy of Sciences. The journal does not accept direct submissions in English.
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