major histocompatibility complex antigen 中文意思是什麼

major histocompatibility complex antigen 解釋
主要組織相容性復合體抗原
  • major : adj (opp minor)1 較大的;較多的;較優的;主要的;第一流的;較大范圍的。2 成年的;〈英國〉(學校...
  • histocompatibility : 組織親和性
  • complex : adj 1 復雜的,錯綜的。2 合成的,綜合的;【化學】絡合的。3 【語法】復合的;含有從屬子句的。n 1 復...
  • antigen : n. 【醫學】抗原。
  • ty : 庇
  1. Dendritic cells ( dc ) is the most powerful apc, which can markedly increase the antigen - presentation capacity by maximizing the pepitide - mhc complexes on the cell surface and upregulating the co - stimulatory ligands b7 - 1 and b7 - 2, adhesion moleculees such as il - 12 that promote full activation of lymphocytes. full activation of antigen - specific t cells requires two signals - one signal coming via the tcr and the other signal through engagment of co - stimulatary molecules. t cells receiving one signal via their tcr are turned off by mhc ( major histocompatibility complex ), via t cell cd28 binding to b7 on the dc induce tlymphokine and t cell proliferatiion

    T細胞介導的細胞免疫在控制腫瘤生長方面發揮著重要作用, t細胞在發揮抗瘤效應(分泌細胞因子和直接殺傷)之前必須先經過活化,體內專職抗原提呈細胞( apc )細胞並使其活化,樹突狀細胞( dendriticcell , dc )為t細胞的激活提供雙重信號, t細胞藉助tcr識別由dcmhc分子遞交的抗原肽后,通過tcr - cd3復合體傳遞抗原特異性識別信號(第一信號) ,以cd28為主的t細胞表面輔佐分子識別dc表面b7分子,傳遞非特異性協同刺激信號(第二信號) ,在機體抗腫瘤免疫應答中處于核心地位。
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