• 大連醫(yī)科大學(xué)附屬第一醫(yī)院普外科(大連116011);

目的 探討體外擴增樹突狀細胞(DC)的方法,體外研究DC介導(dǎo)的細胞毒性T淋巴細胞(CTL)對小鼠胰腺癌的特異性殺傷作用。方法 聯(lián)合應(yīng)用重組鼠源性粒細胞-巨噬細胞集落刺激因子(GM-CSF)和IL-4體外誘導(dǎo)骨髓源性DC,與腫瘤細胞溶解物共培養(yǎng)制備DC疫苗; 觀察DC在負載抗原后體外誘導(dǎo)的主動特異性CTL對胰腺癌細胞的殺傷作用。結(jié)果 用GM-CSF和 IL-4成功地在體外擴增了骨髓源性DC。 TNF-α可誘導(dǎo)骨髓源性DC成熟, 使其表達的CD54、主要組織相溶性復(fù)合物-Ⅱ、CD86等表面分子明顯升高,并增強自分泌IL-12和抗原的遞呈能力,與對照組比較,差異有統(tǒng)計學(xué)意義(P<0.05)。未負載腫瘤細胞抗原的DC所沖擊的T淋巴細胞不能有效地識別特定的靶細胞并產(chǎn)生殺傷作用,DC通過捕獲并遞呈壞死腫瘤細胞抗原才能誘發(fā)顯著的主動特異性CTL,體外對胰腺癌細胞的殺傷效果非常顯著(P<0.01)。結(jié)論 TNF-α可誘導(dǎo)DC的成熟,使DC的抗原遞呈和自分泌IL-12的能力顯著提高,DC遞呈抗原后能誘發(fā)顯著的主動特異性CTL。

引用本文: 譚廣,任金帥,王忠裕,殷朔. TNF-α增強樹突狀細胞誘導(dǎo)的抗胰腺癌免疫應(yīng)答的實驗研究. 中國普外基礎(chǔ)與臨床雜志, 2006, 13(6): 689-692. doi: 復(fù)制

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