dendritic cell dc 中文意思是什麼
dendritic cell dc
解釋
樹突狀細胞-
We hope that our study will provide us with more comprehensive knowledge of the mechanisms of immune regulation and the roles that dc and complement play in innate and acquired immunity, as well as to lay a foundation for further exploration of the roles dc play in antigen - specific immune responses and immune tolerance from a new perspective. part i expression of complement receptors and complement - associated molecules on dendritic cells derived from distinct - origin at different stages of development two subsets of dendritic cells were generated from precursor cells isolated by means of magnetic cell separation system
曰補體受體及其相關分子在modc上的表達不同分化階段的單核細胞衍生性dc （ monocytes一deriveddc ， modc ）的誘導:將新鮮分離的單核細胞mo ，在含有gm一csf和工l一4培養體系中誘導5一7d ，即分化為未成熟modc ;對培養至sd的未成熟modc ，用tnfa刺激zd ，即分化為成熟modc ;此時再用lps刺激24h ，即為活化的modc 。 -
We focused on the following aspects ; 1 ) we first assayed the expression of complement receptors and complement - associated molecules on distinct subsets of dendritic cells during their development in order to understand the physical basis of the sensitivity of dendritic cells to complement and its split products ; we next studied the effects of complement activation on the survival of dendritic cells during their development ; and finally examined the effects of the whole complement system, focusing on the ability of one of the split products of complement activation, c5a, and its first subcomponent - c1q, to influence chemotaxis of dendritic cells, as well as allo - t cell stimulatory activity of dc
我們通過免疫磁珠分離了兩種人dc前體，即髓系來源的單核細胞（ monocytes ， mo ）和淋巴系來源的漿細胞樣dc （ plasmaeytoiddendriticeells ， pdc ） ，對這兩個不同dc亞群進行體外誘導培養，使其處于不同的分化發育階段，然後檢測了其表達補體受體一cd35 （ cri ） 、 cd21 （ crz ） 、 cdilb （ cr3 ） 、 cdlle （ cr4 ） ，補體調控蛋白一cd46 、 cd55 、以及部分補體片斷分子受體一c3ar 、 csar 、 clqrp的水平。 -
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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