DYSREGULATION OF AUTOPHAGY IN PERIPHERAL BLOOD LEUCOCYTES IS A FACTOR IN THE DEVELOPMENT OF INFLAMMAGING IN IMMUNOCOMPROMISED PERSONS ON THE EXAMPLE OF THE SERVICEMEN OF THE DEFENSE FORCES OF UKRAINE AND CLEAN-UP WORKERS OF THE CHORNOBYL ACCIDENT.

L M Zvarych, D A Bazyka
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引用次数: 0

Abstract

Objective: To assess the functional state and age-related characteristics of autophagy in peripheral blood leukocytes as a risk factor for the development of inflammaging using the example of the servicemen of the DefenseForces of Ukraine and clean-up workers of the Chornobyl accident.

Materials and methods: A total of 103 male patients aged 28-77 (56,48 ∓ 9,05) years were examined. They included: the main group - 23 servicemen of the Defense Forces of Ukraine aged 44-59 (50,21 ∓ 5,13) years; the comparison group - 57 clean-up workers of the Chornobyl accident aged 56-63 (60,31 ∓ 1,78) years; and the control group -23 civilians aged 28-77 (53,26 ∓ 15,98) years. The individuals in the main and control groups were divided according to age into subgroups under 50 years and over 50 years. Clean-up workers were divided into 3 subgroups depending on the radiation dose: І - D < 100 mSv, ІІ - 100 < D < 500 mSv and ІІІ - D > 500 mSv. Analysis of autophagyparameters in peripheral blood leukocytes (PB) was performed using flow cytometry and polymerase chain reaction.

Results: In patients of the main group, the autophagy activity factor (AAF) of granulocytes and the expression of theSQSTM1 gene in PB leukocytes decreased. A decrease in chloroquine-induced accumulation of LC3B protein in leukocytes, AAF in PB monocytes and the expression of the MTOR, RB1CC1 and MAP1LC3B genes was revealed in servicemenof the Defense Forces of Ukraine under 50 years of age. The spontaneous levels of LC3B protein and AAF in monocytesand the expression level of PIK3C3, ULK1 and MAP1LC3B genes in PB leukocytes were increased in servicemen of theDefense Forces of Ukraine over 50 years of age. The clean-up workers of different dose groups showed a decrease inthe AAF in lymphocytes and granulocytes, the LC3B level in monocytes after incubation with chloroquine, the expression of the MTOR, RB1CC1, SQSTM1, ULK1, MAP1LC3B, BECN1 and PIK3C3 genes in PB leukocytes, and the AAF of monocytes was higher. Similar changes were revealed in the indices of chloroquine-induced LC3B accumulation in lymphocytes and monocytes of the clean-up workers and servicemen of both age groups, as well as the spontaneous LC3B protein level in PB monocytes of the clean-up workers irradiated at doses above 100 mSv and civilians over 50 years old.

Conclusions: Unidirectional dysregulation of autophagy was established in the servicemen of the Defense Forces ofUkraine and the clean-up workers of the Chornobyl accident. The existing changes in autophagy parameters can leadto disruption of the functioning of the autophagic apparatus of leukocytes at the level of mRNA and protein, as wellas signaling pathways, and be associated with age-related changes at both the cellular and organismal levels. Theemergence of new and persistent earlier stress factors as a result of the war creates an additional load on the mechanisms of maintaining homeostasis, which is observed in individuals exposed to ionizing radiation more than 30years later. The found intergroup differences and similarities can activate the same or similar mechanisms of pathological processes, which will ultimately increase the risks of developing age-associated chronic somatic pathologyin younger age groups.

外周血白细胞自噬失调是免疫功能低下者发生炎症的一个因素,乌克兰国防军军人和切尔诺贝利事故清理工人就是一个例子。
目的:以乌克兰国防军军人和切尔诺贝利事故清理工人为例,评估外周血白细胞自噬的功能状态和年龄相关特征作为炎症发展的危险因素。材料和方法:103例28-77岁男性患者(56,48 + + + 9,05)岁。他们包括:主要群体- 23名乌克兰国防军服役人员,年龄44-59岁(50,21 / 5,13);对照组为57名切尔诺贝利事故清理工人,年龄56-63岁(60,31 / 1,78);对照组23例,年龄28-77岁(53,26);将主组和对照组按年龄分为50岁以下和50岁以上亚组。根据辐射剂量将清理工人分为3个亚组:І - D < 100毫西弗、ІІ - 100 < D < 500毫西弗和ІІІ - D bb0 500毫西弗。采用流式细胞术和聚合酶链反应对外周血白细胞(PB)的自噬参数进行分析。结果:主组患者粒细胞自噬活性因子(autophagy activity factor, AAF)及PB白细胞中qstm1基因表达降低。在50岁以下的乌克兰国防军服役人员中,氯喹诱导的白细胞LC3B蛋白积累、PB单核细胞AAF积累以及MTOR、RB1CC1和MAP1LC3B基因表达减少。乌克兰国防军50岁以上军人单核细胞自发LC3B蛋白、AAF水平升高,PB白细胞自发PIK3C3、ULK1、MAP1LC3B基因表达水平升高。不同剂量组清扫工人淋巴细胞、粒细胞AAF降低,氯喹孵育后单核细胞LC3B水平降低,PB白细胞MTOR、RB1CC1、SQSTM1、ULK1、MAP1LC3B、BECN1、PIK3C3基因表达降低,单核细胞AAF升高。两年龄组清洁工人和军人氯喹诱导的淋巴细胞和单核细胞LC3B积累指标,以及100毫西弗以上剂量的清洁工人和50岁以上平民的PB单核细胞自发LC3B蛋白水平也发生了类似的变化。结论:乌克兰国防军军人和切尔诺贝利事故清理人员存在单向自噬失调。自噬参数的现有变化可导致白细胞自噬装置在mRNA和蛋白质水平以及信号通路的功能破坏,并与细胞和组织水平上的年龄相关变化有关。由于战争而出现的新的和持续的早期压力因素对维持体内平衡的机制造成了额外的负荷,这在30多年后暴露于电离辐射的个体中观察到。发现的组间差异和相似性可以激活相同或相似的病理过程机制,最终将增加年轻群体发生年龄相关慢性躯体病变的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Problemy radiatsiinoi medytsyny ta radiobiolohii
Problemy radiatsiinoi medytsyny ta radiobiolohii Medicine-Radiology, Nuclear Medicine and Imaging
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