mesЭкстремальная биомедицинаExtreme Medicine3033-89643033-8972Centre for Strategic Planning of the Federal Medical and Biological Agency10.47183/mes.2022.018mes-197Research ArticleОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕORIGINAL RESEARCHСубпопуляционный состав Т-хелперов в периферической крови хронически облученных лиц в отдаленном периодеSubpopulation composition of T-helpers in the peripheral blood of persons chronically exposed to radiation in the long termКотиковаА. И.KotikovaA. I.

Алиса Игоревна Котикова

ул. Воровского, д. 68, корп. А, г. Челябинск, 454141

Alisa I. Kotikova

Vorovskogo, 68, str. A, Chelyabinsk, 454141 

kotikovaalisa@gmail.comБлиноваЕ. А.BlinovaE. A.

г. Челябинск

Chelyabinsk

АклеевА. В.AkleyevA. V.

г. Челябинск

Chelyabinsk

Уральский научно-практический центр радиационной медицины Федерального медико-биологического агентства; Челябинский государственный университетРоссияUrals Research Center for Radiation MedicineRussian Federation2022281020242426573Copyright © Котикова А.И., Блинова Е.А., Аклеев А.В., 20242024Котикова А.И., Блинова Е.А., Аклеев А.В.Kotikova A.I., Blinova E.A., Akleyev A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.extrememedicine.ru/jour/article/view/197

К настоящему времени убедительно показано, что воздействие ионизирующего излучения (ИИ) вызывает долгосрочное изменение Т-клеточного иммунитета. Однако количественных исследований влияния хронического радиационного воздействия на различные субпопуляции Т-хелперов в доступной литературе найдено не было. Поэтому целью работы было исследовать количественные характеристики различных субпопуляций Т-хелперов в периферической крови лиц, подвергшихся хроническому низкоинтенсивному радиационному воздействию, в отдаленные сроки после начала облучения. В исследовании приняло участие 102 хронически облученных жителя прибрежных сел реки Течи (Россия) в возрасте 60–87 лет, которые были подразделены на облученных лиц (средняя накопленная доза облучения красного костного мозга составила 567 ± 73 мГр) и группу сравнения (доза облучения не превышала 70 мГр). Методом проточной цитометрии определяли количественные характеристики субпопуляций Т-хелперов в периферической крови на разной стадии их дифференцировки, а также различные субпопуляции Т-хелперов центральной и эффекторной памяти. В ходе исследования не выявлено статистически значимых различий в субпопуляционном составе Т-хелперов в сравниваемых группах. Отмечено статистически значимое повышение содержания субпопуляции «double positive» фолликулярных Т-хелперов 17 в популяции Т-хелперов центральной памяти с увеличением дозы облучения ККМ (p = 0,04; S = 0,19), а также тимуса и периферических лимфоидных органов (p = 0,03; S = 0,22). В группе облученных лиц зарегистрировано снижение количества наивных Т-хелперов (p = 0,009) и «double positive» фолликулярных Т-хелперов 17 в составе субпопуляции ТЕМ (p = 0,04) и увеличение количества Т-хелперов эффекторной памяти (p = 0,04) с увеличением возраста, чего не наблюдалось в группе сравнения.

Earlier, it has been convincingly established that exposure to ionizing radiation (IR) alters the T cell-mediated immunity in the long term. However, a search for papers describing the effect chronic exposure to radiation has on various subpopulations of T-helpers yielded no results. Therefore, we designed this study seeking to investigate the quantitative characteristics of various subpopulations of T-helpers in the peripheral blood of individuals chronically exposed to low-level radiation for a long period of time. The study involved 102 chronically exposed Techa Riverside residents (Russia) aged 60–87 years. The participants were divided into two groups, one comprised of exposed individuals with the average red bone marrow (RBM) irradiation dose of 567 ± 73 mGy, another, the control group, comprised of people with the irradiation dose below 70 mGy. With the help of flow cytometry, we identified the quantitative characteristics of T-helper subpopulations in the peripheral blood at various stages of their differentiation, as well as various T-helper subpopulations of central and effector memory. The study revealed no significant differences in the composition of T-helper subpopulations in the compared groups. We discovered a significant growth of the double positive follicular T-helper 17 subpopulation in the population of central memory T-helpers, which is associated with the increase of RBM (p = 0.04; S = 0.19), thymus and peripheral lymphoid organs (p = 0.03; S = 0.22) irradiation dose. In the group of exposed individuals, the number of naive T-helpers (p = 0.009) and double positive follicular T-helpers 17 in the TEM subpopulation (p = 0.04) was decreasing as the age of participants increased, and the number of effector memory T-helpers, on the contrary, increased with age (p = 0.04). We have not registered similar phenomena in the comparison group.

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The authors declare that there are no conflicts of interest present.