目的探讨优化大鼠骨髓来源树突状细胞(DC)体外培养体系的方法。方法应用重组大鼠粒细胞-巨噬细胞集落刺激因子(recombinant rat GM-CSF,rrGM-CSF)20μg/L和重组大鼠白介素(recombinant rat interleukin,rrIL)-410μg/L诱导分化Lewis大...目的探讨优化大鼠骨髓来源树突状细胞(DC)体外培养体系的方法。方法应用重组大鼠粒细胞-巨噬细胞集落刺激因子(recombinant rat GM-CSF,rrGM-CSF)20μg/L和重组大鼠白介素(recombinant rat interleukin,rrIL)-410μg/L诱导分化Lewis大鼠骨髓单个核细胞,获得未成熟DC(immature DC,imDC)。第6日加入终含量为100μg/L的脂多糖(lipopolysaccharides,LPS)刺激细胞成为成熟DC(mature DC,mDC)。用倒置相差显微镜观察细胞形态,流式细胞术鉴定细胞表型、双抗夹心酶联免疫吸附测定法(ELISA)检测DC培养上清液中白介素(IL)-12、IL-10的含量,并以Brown Norway大鼠脾脏T淋巴细胞为反应细胞,做混合淋巴细胞反应检测,观察DC刺激T淋巴细胞增殖能力。结果经细胞形态学、流式细胞术及混合淋巴细胞反应三方面鉴定,证实所培养细胞为DC。体外培养第6日,见大量增殖细胞集落,细胞高表达OX62。LPS刺激细胞后,细胞伪足样突起明显增多,细胞逐渐呈半悬浮、悬浮生长,细胞表面高表达主要组织相容性抗原复合体(MHC)Ⅱ类分子和共刺激分子(CD40、CD86)。与imDC比较,mDC分泌IL-10和IL-12显著增加,刺激同种异体T淋巴细胞增殖的能力显著提高。结论通过采用调整rrGM-CSF和rrIL-4的用量等方法优化体外培养体系诱导大鼠骨髓单个核细胞,可分化出大量骨髓源性DC。展开更多
To identify the metabolite and CYP450 isoforms involved in rat liver microsomal metabolism of TM208. The present study investigated the metabolism of TM208 and the effects of selective CYP450 inhibitors on the metabol...To identify the metabolite and CYP450 isoforms involved in rat liver microsomal metabolism of TM208. The present study investigated the metabolism of TM208 and the effects of selective CYP450 inhibitors on the metabolism of TM208 in rat liver microsomes. Various specific inhibitors of CYP were used to identify the isoforms of CYP involved in the metabolism of TM208. The inhibitor of CYP2D and that of CYP2B had strong inhibitory effects on TM208 metabolism in a concentration-de- pendant manner, the inhibitor of CYP1A had a modest inhibitory effect, and the inhibitor of CYP3A seemed not to have an obvious inhibitory effect on TM208 metabolism. TM208 might mainly be metabolized by CYP2D and CYP2B in rat liver microsomes.展开更多
文摘目的探讨优化大鼠骨髓来源树突状细胞(DC)体外培养体系的方法。方法应用重组大鼠粒细胞-巨噬细胞集落刺激因子(recombinant rat GM-CSF,rrGM-CSF)20μg/L和重组大鼠白介素(recombinant rat interleukin,rrIL)-410μg/L诱导分化Lewis大鼠骨髓单个核细胞,获得未成熟DC(immature DC,imDC)。第6日加入终含量为100μg/L的脂多糖(lipopolysaccharides,LPS)刺激细胞成为成熟DC(mature DC,mDC)。用倒置相差显微镜观察细胞形态,流式细胞术鉴定细胞表型、双抗夹心酶联免疫吸附测定法(ELISA)检测DC培养上清液中白介素(IL)-12、IL-10的含量,并以Brown Norway大鼠脾脏T淋巴细胞为反应细胞,做混合淋巴细胞反应检测,观察DC刺激T淋巴细胞增殖能力。结果经细胞形态学、流式细胞术及混合淋巴细胞反应三方面鉴定,证实所培养细胞为DC。体外培养第6日,见大量增殖细胞集落,细胞高表达OX62。LPS刺激细胞后,细胞伪足样突起明显增多,细胞逐渐呈半悬浮、悬浮生长,细胞表面高表达主要组织相容性抗原复合体(MHC)Ⅱ类分子和共刺激分子(CD40、CD86)。与imDC比较,mDC分泌IL-10和IL-12显著增加,刺激同种异体T淋巴细胞增殖的能力显著提高。结论通过采用调整rrGM-CSF和rrIL-4的用量等方法优化体外培养体系诱导大鼠骨髓单个核细胞,可分化出大量骨髓源性DC。
基金National Basic Research Program of China (863 Program,Grant No.2004AA2Z3783)National Natural Science Foundation of China (Grant No.20672009)
文摘To identify the metabolite and CYP450 isoforms involved in rat liver microsomal metabolism of TM208. The present study investigated the metabolism of TM208 and the effects of selective CYP450 inhibitors on the metabolism of TM208 in rat liver microsomes. Various specific inhibitors of CYP were used to identify the isoforms of CYP involved in the metabolism of TM208. The inhibitor of CYP2D and that of CYP2B had strong inhibitory effects on TM208 metabolism in a concentration-de- pendant manner, the inhibitor of CYP1A had a modest inhibitory effect, and the inhibitor of CYP3A seemed not to have an obvious inhibitory effect on TM208 metabolism. TM208 might mainly be metabolized by CYP2D and CYP2B in rat liver microsomes.