目的探讨脐血淋巴细胞凋亡在妊娠期肝内胆汁淤积症(intrahepatic cholestasis of pregnancy,ICP)发病中的意义。方法采用流式细胞技术分析ICP患者和正常妊娠妇女脐血淋巴细胞的凋亡率;通过免疫细胞化学染色技术检测ICP患者和正常妊娠妇...目的探讨脐血淋巴细胞凋亡在妊娠期肝内胆汁淤积症(intrahepatic cholestasis of pregnancy,ICP)发病中的意义。方法采用流式细胞技术分析ICP患者和正常妊娠妇女脐血淋巴细胞的凋亡率;通过免疫细胞化学染色技术检测ICP患者和正常妊娠妇女脐血淋巴细胞上凋亡调控基因Fas、FasL、Bcl-2的蛋白表达。结果ICP患者脐血淋巴细胞凋亡率低于正常妊娠组(P<0.001),脐血淋巴细胞上Fas、Bcl-2表达水平两组间差异无统计学意义(P>0.05),而FasL表达水平在ICP组高于正常妊娠组(P<0.005)。结论ICP患者存在脐血淋巴细胞凋亡率及凋亡调控基因表达的异常,可能致移植物抗宿主反应异常而在ICP的发病中起一定作用。展开更多
Human placenta-derived mononuclear cells （MNC） were isolated by a Percoll density gradient and cultured in mesenchymal stem cell （MSC） maintenance medium. The homogenous layer of adherent cells exhibited a typical...Human placenta-derived mononuclear cells （MNC） were isolated by a Percoll density gradient and cultured in mesenchymal stem cell （MSC） maintenance medium. The homogenous layer of adherent cells exhibited a typical fibroblastlike morphology, a large expansive potential, and cell cycle characteristics including a subset of quiescent cells. In vitro differentiation assays showed the tripotential differentiation capacity of these cells toward adipogenic, osteogenic and chondrogenic lineages. Flow cytometry analyses and immunocytochemistry stain showed that placental MSC was a homogeneous cell population devoid of hematopoietic cells, which uniformly expressed CD29, CD44, CD73, CD105, CD166, laminin, fibronectin and vimentin while being negative for expression of CD31, CD34, CD45 and m-smooth muscle actin. Most importantly, immuno-phenotypic analyses demonstrated that these cells expressed class Ⅰ major histocompatibility complex （MHC-I）, but they did not express MHC-Ⅱ molecules. Additionally these cells could suppress umbilical cord blood （UCB） lymphocytes proliferation induced by cellular or nonspecific mitogenic stimuli. This strongly implies that they may have potential application in allograft transplantation. Since placenta and UCB are homogeneous, the MSC derived from human placenta can be transplanted combined with hematopoietic stem cells （HSC） from UCB to reduce the potential graft-versus-host disease （GVHD） in recipients.展开更多
Objective To explore the immune promotion mechanism of retinoic acid (RA).Methods Reverse Transcription-Polymerase chain reaction (RT-PCR) was used to detect the gene expression of insulin like growth factor Ⅰ (IGF...Objective To explore the immune promotion mechanism of retinoic acid (RA).Methods Reverse Transcription-Polymerase chain reaction (RT-PCR) was used to detect the gene expression of insulin like growth factor Ⅰ (IGF-Ⅰ) and IGF receptors (IGF-IR and IGF-IIR) in vitro, and their regulation by RA in human cord blood lymphocyte (CBL). Results Significant upregulation of IGF-I, IGF-IR and IGF-IIR mRNA was found at 6-24 hours in CBL incubated with physiologic concentrations of RA as compared to those without RA. Conclusion The enhancement of IGF expression may be an important pathway for vitamin A to promote immune cellular functions.展开更多
文摘目的探讨脐血淋巴细胞凋亡在妊娠期肝内胆汁淤积症(intrahepatic cholestasis of pregnancy,ICP)发病中的意义。方法采用流式细胞技术分析ICP患者和正常妊娠妇女脐血淋巴细胞的凋亡率;通过免疫细胞化学染色技术检测ICP患者和正常妊娠妇女脐血淋巴细胞上凋亡调控基因Fas、FasL、Bcl-2的蛋白表达。结果ICP患者脐血淋巴细胞凋亡率低于正常妊娠组(P<0.001),脐血淋巴细胞上Fas、Bcl-2表达水平两组间差异无统计学意义(P>0.05),而FasL表达水平在ICP组高于正常妊娠组(P<0.005)。结论ICP患者存在脐血淋巴细胞凋亡率及凋亡调控基因表达的异常,可能致移植物抗宿主反应异常而在ICP的发病中起一定作用。
基金This study was supported by a grant from National Natural Science Foundation of China(No.30271245)Hi-Tech Research and Development Program of China(863 Program)(No.2003AA205170)+1 种基金National Basic Research Program of China(973 Program)(No.G 1999054302)a grant from Bejing Gynecology and Obstetrics Hospital Affiliate of Capital University of Medical Sciences.
文摘Human placenta-derived mononuclear cells （MNC） were isolated by a Percoll density gradient and cultured in mesenchymal stem cell （MSC） maintenance medium. The homogenous layer of adherent cells exhibited a typical fibroblastlike morphology, a large expansive potential, and cell cycle characteristics including a subset of quiescent cells. In vitro differentiation assays showed the tripotential differentiation capacity of these cells toward adipogenic, osteogenic and chondrogenic lineages. Flow cytometry analyses and immunocytochemistry stain showed that placental MSC was a homogeneous cell population devoid of hematopoietic cells, which uniformly expressed CD29, CD44, CD73, CD105, CD166, laminin, fibronectin and vimentin while being negative for expression of CD31, CD34, CD45 and m-smooth muscle actin. Most importantly, immuno-phenotypic analyses demonstrated that these cells expressed class Ⅰ major histocompatibility complex （MHC-I）, but they did not express MHC-Ⅱ molecules. Additionally these cells could suppress umbilical cord blood （UCB） lymphocytes proliferation induced by cellular or nonspecific mitogenic stimuli. This strongly implies that they may have potential application in allograft transplantation. Since placenta and UCB are homogeneous, the MSC derived from human placenta can be transplanted combined with hematopoietic stem cells （HSC） from UCB to reduce the potential graft-versus-host disease （GVHD） in recipients.
基金NationalNaturalScienceFoundationof China! (No 3 9470 613 )
文摘Objective To explore the immune promotion mechanism of retinoic acid (RA).Methods Reverse Transcription-Polymerase chain reaction (RT-PCR) was used to detect the gene expression of insulin like growth factor Ⅰ (IGF-Ⅰ) and IGF receptors (IGF-IR and IGF-IIR) in vitro, and their regulation by RA in human cord blood lymphocyte (CBL). Results Significant upregulation of IGF-I, IGF-IR and IGF-IIR mRNA was found at 6-24 hours in CBL incubated with physiologic concentrations of RA as compared to those without RA. Conclusion The enhancement of IGF expression may be an important pathway for vitamin A to promote immune cellular functions.
