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자가면역 질환과 HERV의 병인학적 관계

The Etiological Relationship between Autoimmune Diseases and HERVs

  • 발행 : 2003.04.01

초록

인간의 면역계는 외부의 병원균 등의 침입에 대하여 매우 강력한 방어작용을 수행하고 있다. 하지만, 때로 면역계의 손상으로 인해 비정상적인 면역작용이 유발됨으로써 면역성 질환이 야기되기도 한다. 특히, 자가면역 질환은 그 종류가 매우 다양하며 심각한 위험을 초래하기도 한다 이들 질환에 대한 활발한 병인학적 연구가 진행되고 있으나, 아직 정확한 메커니즘을 밝히지는 못하고 있다. 자가면역성 당뇨병의 원인 유전자로 인간의 게놈에 내생하고 있는 HERV가 거론된 후, 사이토카인의 변화나 외생 레트로바기러스의 감염에 의해 HERV의 발현이 활성화되어 superantigen으로 작용함으로써 비정상적인 면역반응이 유도된다는 새로운 사실이 밝혀져 많은 주목을 끌고 있다. 이는 내생 레트로바이러스 유래의 superantigen과 인간의 질병과의 관련성을 비교적명확하게 제시함으로써, 자가면역 질환의 극복을 위한 향후 연구에 주요한 실마리를 제공하고 있다.

Human immune system acts to protect the host from infectious agents (bacteria, viruses, fungi, parasites) and from other noxious insults. However, immune diseases are sometimes caused by the impairment of immune system leading to abnormal immune response. Especially, autoimmune diseases are very diverse and often bring serious damage Although many active investigations to reveal the etiological mechanisms concerning the autoimmune diseases, it still remains unclear. After proposing a HERV (human endogenous retrovirus) as a candidate autoimmune gene in type I diabetes, it is newly attracting our attention for demonstrating that an endogenous human retroviral superantigen can be transactivated by interferon-$\alpha$ (IFN- $\alpha$) or Epstein-Barr virus (EBV) infection. These might provide us with powerful clues to carry out further studies to overcome autoimmune diseases as the presentation of a relatively clear connection between endogenous superantigens and human diseases.

키워드

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