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NTIS 바로가기Reproductive & developmental biology = 한국동물번식학회지, v.39 no.3, 2015년, pp.59 - 67
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핵심어 | 질문 | 논문에서 추출한 답변 |
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초급성거부반응이란 무엇인가? | 초급성거부반응(Hyperacute rejection)은 동물의 장기를 인간에게 이식할 때, 돼지의 혈관세포 표면에 붙은 당분자에 인간의 항체가 즉각 반응하여 일어나는 거부반응으로 알려져 있다(Platt와 Lin, 1998; Cooper 등, 1993; Sandrin 등, 1993). Galα(1,3)Gal 당분자는 돼지, 마우스, new world monkeys에는 존재하지만, 인간과 old world monkeys에는 부재한다고 알려져 있으며, Xenogeneic natural antibody(XNA)에 의해 인식되는 당사슬항원(carbohydrate epitope)은 대부분이 Galα(1,3)Gal 당분자로 α1,3-galactosyltransferase(α1,3-GT)유전자가 Galα(1,3)Gal 당분자 생성에 관여한다고 보고되어 있다(Blanken와 Van den Eijnden, 1985; Galili 등, 1987; Koren 등, 1992). | |
초급성거부반응를 극복하기 위한 방안에는 어떠한 것이 있는가? | Galα(1,3)Gal 당분자는 돼지, 마우스, new world monkeys에는 존재하지만, 인간과 old world monkeys에는 부재한다고 알려져 있으며, Xenogeneic natural antibody(XNA)에 의해 인식되는 당사슬항원(carbohydrate epitope)은 대부분이 Galα(1,3)Gal 당분자로 α1,3-galactosyltransferase(α1,3-GT)유전자가 Galα(1,3)Gal 당분자 생성에 관여한다고 보고되어 있다(Blanken와 Van den Eijnden, 1985; Galili 등, 1987; Koren 등, 1992). α1,3-GT 유전자를 제거시키는 것은 초급성거부반응을 극복하기 위한 방법 중 하나로, α1,3-GT 유전자를 knock-out시킨 돼지가 생산되었다(Lai 등, 2002; Dai 등, 2002). α1,3-GT 유전자를 knock-out 시킨 돼지 장기의 이식은 초급성 거부반응을 억제할 수 있었지만, 초급성 거부반응에 이은 급성 거부반응을 극복하기 위해서는 더 연구가 필요하다. | |
사람에게 돼지 장기를 이식하는 이종 간의 장기이식의 면역학적 문제는 어떠한 항체와 관련이 있는가? | 이종 간의 장기이식에 따른 치료 목적에 이용할 수 있는 동물자원으로써 돼지는 인간 장기의 부족한 실정을 극복해 나갈 수 있는 대체자원 중의 한 가지이다(Levy 등, 2001). 그러나 사람에게 돼지 장기를 이식하는 데 있어서 발생하는 면역학적 문제는 자연적으로 일어나는 면역체계와 anti-gal 항체의 중요한 역할과 관련이 있다고 보고되고 있다(Morgan, 1995; Levy 등, 2001). |
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