생명과학회지 (Journal of Life Science)

  • 제29권7호
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  • Pages.817-823
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  • 2019
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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면역 반응체계의 노화

Aging of Immune System

  • 투고 : 2019.07.23
  • 심사 : 2019.07.25
  • 발행 : 2019.07.30
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⟨ 이전 논문 다음 논문 ⟩

초록

노화는 광범위한 생리 변화이다. 노화가 진행됨에 따라 면역반응은 쇠퇴하고 조절장애가 나타나는데 이를 포괄적 의미로 immunosenescense라고 정의한다. 내재면역반응과 적응면역 반응 모두의 면역 성분은 노화가 진행됨에 따라 영향을 받아 감염성 질병에 대한 취약성이 증가하게 된다. 노화된 동물 모델과 인간에서 면역 세포의 수와 용해성 면역 인자의 양이 줄어 들었고, 면역체계의 기능이 감소하였고, 구조적인 변형과 퇴화가 나타났다. 또한, 세포 내 신호분자와 같은 내재적 변화도 발견되었다. 최근 노화와 관련된 연구는 급격히 증가하였고, 면역체계 영역을 포함하여 다양한 방향으로 노화현상을 분석하는 진보된 기술들이 개발되고 있다. 이 총설은 면역의 주요 구성 요소의 노화 관련 변화에 대한 광범위한 개요를 제공하고자 하였다.

Immune system provides defense integrity of body against external invaders. In order to accomplish the important defending role immune system is composed of many different components which are regenerated continuously during lifespan. The key components are professional killing cells such as macrophage, neutrophil, natural killer cell, and cytotoxic T cell and professional blocking molecule, antibody, which is produced by plasma cell, the terminal differentiated B cell. Immune response is orchestrated harmoniously by all these components mediated through antigen presenting cells such as dendritic cells. Immune responses can be divided into two ways: innate immune response and adaptive immune response depending on induction mechanism. Aging is a broad spectrum of physiological changes. Likewise other physiological changes, the immune components and responses are wane as aging is progressing. Immune responses become decline and dysregulating, which is called immunosenescense. Immune components of both innate and adaptive immune response are affected as aging progresses leading to increased vulnerability to infectious diseases. Numbers of immune cells and amounts of soluble immune factors were decreased in aged animal models and human and also functional and structural alterations in immune system were reduced and declined. Cellular intrinsic changes were discovered as well. Recent researches focusing on aging have been enormously growing. Many advanced tools were developed to bisect aging process in multi-directions including immune system area. This review will provide a broad overview of aging-associated changes of key components of immunity.

키워드

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Fig. 1. Composition of immune system.

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Fig. 2. Changes of Immune responses from young to elderly people.

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Fig. 3. Schematic graphs of lymphocyte population changes as the aging process progresses.

Table 1. Age-related functional changes of macrophage

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