小鼠樹突狀細(xì)胞成熟前后的形態(tài)及其微絲蛋白的適應(yīng)性改變
發(fā)布時(shí)間:2018-08-11 14:22
【摘要】: 目的研究樹突狀細(xì)胞(DC)成熟前后的形態(tài)及其微絲蛋白的適應(yīng)性變化。 材料和方法經(jīng)重組小鼠粒細(xì)胞-巨噬細(xì)胞集落刺激因子、白細(xì)胞介素-4誘導(dǎo)小鼠骨髓單核細(xì)胞為未成熟樹突狀細(xì)胞(imDC),培養(yǎng)至第6天時(shí),用脂多糖(LPS)誘導(dǎo)成成熟樹突細(xì)胞(mDC),在倒置相差顯微鏡和熒光顯微鏡下觀察并前后對(duì)比分析細(xì)胞在成熟前后的表面突起和內(nèi)部微絲蛋白(Filament Actin ,F-Actin)的變化。 結(jié)果 1. mDC高表達(dá)CD11c、MHC-Ⅱ和CD86。 2.成熟前的DC體積較小,隨著細(xì)胞的成熟,直徑逐漸增大,成熟過程中,DC表面突起逐漸增多、變粗且變長,呈怒張狀,在第7天達(dá)到高峰,以后突起逐漸松弛變軟,最后又回復(fù)至短細(xì)、稀疏狀態(tài)。 3.微絲蛋白主要集中于細(xì)胞膜和觸突上,其平均熒光強(qiáng)度在LPS刺激24 h后最高,48 h后明顯降低;細(xì)胞內(nèi)F-肌動(dòng)蛋白在成熟過程中逐漸減低,LPS刺激16 h后達(dá)高峰,以后細(xì)胞內(nèi)又重新出現(xiàn)F-肌動(dòng)蛋白的表達(dá),且與細(xì)胞膜、突起間基本均勻一致。 結(jié)論 1.樹突狀細(xì)胞在成熟過程中體積逐漸增大,突起逐漸增多、增長,密度逐漸加大,其目的旨在盡可能地增大細(xì)胞的表面積,最大限度地發(fā)揮DC提取、呈遞抗原的功能。 2.細(xì)胞核逐漸增大,暗示細(xì)胞核在抗原的處理、加工過程中發(fā)揮著重要的作用;在此過程中,如微絲等細(xì)胞骨架也逐漸增生給予密切的配合。
[Abstract]:Objective to study the morphology of dendritic cells before and after (DC) maturation and the adaptive changes of microfilaments. Materials and methods Mouse bone marrow monocytes were induced to be immature dendritic cells (imDC),) cultured for 6 days by recombinant mouse granulocyte-macrophage colony stimulating factor (IL-4). The (mDC), of mature dendritic cells induced by lipopolysaccharide (LPS) was observed under inverted phase contrast microscope and fluorescence microscope, and the changes of (Filament Actin F-actin, a microfilament protein, were compared before and after maturation. Results 1. MDC overexpression of MHC- 鈪,
本文編號(hào):2177247
[Abstract]:Objective to study the morphology of dendritic cells before and after (DC) maturation and the adaptive changes of microfilaments. Materials and methods Mouse bone marrow monocytes were induced to be immature dendritic cells (imDC),) cultured for 6 days by recombinant mouse granulocyte-macrophage colony stimulating factor (IL-4). The (mDC), of mature dendritic cells induced by lipopolysaccharide (LPS) was observed under inverted phase contrast microscope and fluorescence microscope, and the changes of (Filament Actin F-actin, a microfilament protein, were compared before and after maturation. Results 1. MDC overexpression of MHC- 鈪,
本文編號(hào):2177247
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