为探讨人参总皂甙(totalsaponins of panaxginseng,TSPG)协同造血生长因子体外诱导CD34+造血干/祖细胞(HSC/HPC)扩增与分化的作用,收集人脐血、骨髓细胞并采用StemsepTM干细胞分选系统分离纯化CD34+HSC/HPC,用不同剂量TSPG加入不同组合...为探讨人参总皂甙(totalsaponins of panaxginseng,TSPG)协同造血生长因子体外诱导CD34+造血干/祖细胞(HSC/HPC)扩增与分化的作用,收集人脐血、骨髓细胞并采用StemsepTM干细胞分选系统分离纯化CD34+HSC/HPC,用不同剂量TSPG加入不同组合的造血生长因子进行培养,检测细胞总数、CD34+细胞和CD33+细胞比例及集落形成细胞总数(CFC)、粒系祖细胞(CFU-GM)数量变化。结果显示:10-70μg/mlTSPG均可不同程度地提高脐血细胞总数、CFC数和CD34+细胞数,50μg/ml是最佳刺激浓度,可使细胞总数、CFC数和CD34+细胞数分别增至(2470.5±79.96)×103、(53.96±4.29)×100%和(21.86±3.09)×100%;20μg/ml是液体培养诱导骨髓CD34+细胞向粒系分化的最佳浓度,可使细胞总数、CFU-GM和CD33+细胞分别增至(133.2±9.03)×103、(26.78±1.91)×100%和(16.98±1.73)×100%;甲基纤维素半固体培养检测显示,TSPG(10-50μg/ml)均能提高CD34+细胞形成CFU-GM的集落产率,以TSPG20μg/ml效果最为明显。结论:合适剂量的TSPG能够促进CD34+造血干/祖细胞体外扩增与定向诱导分化。展开更多
AIM: To enrich putative hepatic progenitors from the developing human fetal liver using CD34 as a marker. METHODS: Aborted fetuses of 13-20 wk were used for the isolation of liver cells. The cells were labeled with an...AIM: To enrich putative hepatic progenitors from the developing human fetal liver using CD34 as a marker. METHODS: Aborted fetuses of 13-20 wk were used for the isolation of liver cells. The cells were labeled with anti CD34; a marker used for isolating progenitor population and the cells were sorted using magnetic cell sorting. The positive fractions of cells were assessed for specific hepatic markers. Further, these cells were cultured in vitro for long term investigation. RESULTS: Flow cytometric and immunocytochemical analysis for alphafetoprotein (AFP) showed that the majority of the enriched CD34 positive cells were positive for AFP. Furthermore, these enriched cells proliferated in the long term and maintained hepatic characteristics in in vitro culture. CONCLUSION: The study shows that aborted human fetal liver is a potential source for isolation of hepatic progenitors for clinical applications. The study also demonstrates that CD34 can be a good marker for the enrichment of progenitor populations.展开更多
文摘为探讨人参总皂甙(totalsaponins of panaxginseng,TSPG)协同造血生长因子体外诱导CD34+造血干/祖细胞(HSC/HPC)扩增与分化的作用,收集人脐血、骨髓细胞并采用StemsepTM干细胞分选系统分离纯化CD34+HSC/HPC,用不同剂量TSPG加入不同组合的造血生长因子进行培养,检测细胞总数、CD34+细胞和CD33+细胞比例及集落形成细胞总数(CFC)、粒系祖细胞(CFU-GM)数量变化。结果显示:10-70μg/mlTSPG均可不同程度地提高脐血细胞总数、CFC数和CD34+细胞数,50μg/ml是最佳刺激浓度,可使细胞总数、CFC数和CD34+细胞数分别增至(2470.5±79.96)×103、(53.96±4.29)×100%和(21.86±3.09)×100%;20μg/ml是液体培养诱导骨髓CD34+细胞向粒系分化的最佳浓度,可使细胞总数、CFU-GM和CD33+细胞分别增至(133.2±9.03)×103、(26.78±1.91)×100%和(16.98±1.73)×100%;甲基纤维素半固体培养检测显示,TSPG(10-50μg/ml)均能提高CD34+细胞形成CFU-GM的集落产率,以TSPG20μg/ml效果最为明显。结论:合适剂量的TSPG能够促进CD34+造血干/祖细胞体外扩增与定向诱导分化。
基金Supported by Department of Biotechnology, Government of India
文摘AIM: To enrich putative hepatic progenitors from the developing human fetal liver using CD34 as a marker. METHODS: Aborted fetuses of 13-20 wk were used for the isolation of liver cells. The cells were labeled with anti CD34; a marker used for isolating progenitor population and the cells were sorted using magnetic cell sorting. The positive fractions of cells were assessed for specific hepatic markers. Further, these cells were cultured in vitro for long term investigation. RESULTS: Flow cytometric and immunocytochemical analysis for alphafetoprotein (AFP) showed that the majority of the enriched CD34 positive cells were positive for AFP. Furthermore, these enriched cells proliferated in the long term and maintained hepatic characteristics in in vitro culture. CONCLUSION: The study shows that aborted human fetal liver is a potential source for isolation of hepatic progenitors for clinical applications. The study also demonstrates that CD34 can be a good marker for the enrichment of progenitor populations.
