Age related changes in population of peripheral T cells: towards a model of immunosenescenceстатья

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus, Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 5 февраля 2015 г.

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1. Полный текст Aging.pdf 891,3 КБ 4 февраля 2015 [eburg]

[1] Romanyukha A., Yashin A. Age related changes in population of peripheral t cells: towards a model of immunosenescence // Mechanisms of Ageing and Development. — 2003. — Vol. 124, no. 4. — P. 433–443. In this paper, we presented the results of analysis of experimental evidence for the decline of the human immune system functioning with age using mathematical model of immunosenescence. The most prominent changes in this system are related to the decline in the T-cellular immunity. These include the decline in the naı¨ve T cells generation rate, shrinkage of the volume of the peripheral lymphoid tissue, decline of absolute and relative concentrations of naı¨ve T cells in the blood, shortening of the average telomere length of T cells. These alterations in the immune system are responsible for sharp increase of morbidity and mortality caused by infectious agents at old ages. Analysis shows that concentrations of memory and naı¨ve T cells in peripheral lymphoid tissue are the key variables in this process. Simulation experiments with our model show that the average life span of memory T cells must grow with age, and that decreasing of antigenic load led to considerable increase in organism’s resistance in middle ages, but only to slight increase in old ages. Restriction in the rate of thymus involution resulted in an increase of organism’s resistance to infections in old ages. However, this growth is accompanied by the decline of concentration of memory T cells and shortening of their life span. The proposed model describes the trade-off between concentrations of naı¨ve and memory T cells and their potential to proliferate in human organism.

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