Spermatogonial stem cells （SSCs） divide continuously to support spermatogenesis throughout postnatal life and transmit genetic information to the next generation. Here, we report the successful establishment of the ...Spermatogonial stem cells （SSCs） divide continuously to support spermatogenesis throughout postnatal life and transmit genetic information to the next generation. Here, we report the successful establishment of the method for the isolation and identification of human SSCs from testicular tissue, and to determine the culture conditions required to expand SSCs on human embryonic stem cell-derived fibroblast-like cells （hdFs）. Large-scale cultures of SSCs were maintained on hdF feeder layers and expanded in the presence of a combination of cytokines and glial cell line-derived neurotrophic factor for at least 2 months. Cell surface marker analysis showed that SSCs retained high levels of alkaline phosphatase activity and stained strongly for anti-stage-specific embryonic antigen （SSEA）-1, OCT4 and CD49f. They also expressed the genes OCT4, SOX3 and STRA8 as detected by reverse transcription polymerase chain reaction （RT-PCR） analysis. These data clearly illustrate a novel approach for the growth of human SSCs using hdFs as feeder cells, potentially eliminating xenogeneic contaminants. This system provides a new opportunity for the study of the regulatory mechanism of the ‘niche＇ that governs SSC self-renewal, and will be a valuable source of SSCs for potential clinical applications.展开更多
Background： Development of innovative immunotherapy is imperative to improve the poor survival of the nasopharyngeal carcinoma （NPC） patients. In this study, we evaluated the T cell response to melanoma-associated ...Background： Development of innovative immunotherapy is imperative to improve the poor survival of the nasopharyngeal carcinoma （NPC） patients. In this study, we evaluated the T cell response to melanoma-associated antigen （MAGE）-A1, MAGE-A3, or synovial sarcoma X-2 （SSX-2） in the peripheral blood of treatment-naive NPC patients. The relationship of responses among the three proteins and the human leukocyte antigen （HLA）-A types were analyzed to provide evidence of designing novel therapy. Methods： Sixty-one NPC patients admitted into the Tumor Hospital affiliated to the Xinjiang Medical University between March 2015 and July 2016 were enrolled. Mononuclear cells were isolated from the peripheral blood before any treatment. HLA-A alleles were typed with Sanger sequence-based typing technique. The T cell response to the MAGE-A1, MAGE-A3, or SSX-2 was evaluated with the Enzyme-Linked ImmunoSpot assay. Mann-Whitney U-test was used to compare the T cell responses from different groups. Spearman＇s rank correlation was used to analyze the relationship of T cell responses. Results： HLA-A＊02：01, A＊02：07, and A＊24：02 were the three most frequent alleles （18.9%, 12.3%, and 11.5%, respectively） among the 22 detected alleles. 31.1%, 19.7%, and 16.4% of the patients displayed MAGE-A1, MAGE-A3, or SSX-2-specific T cell response, respectively. The magnitudes of response to the three proteins were 32.5, 38.0, and 28.7 SFC/106 peripheral blood mononuclear cells, respectively. The T cell response against the three proteins correlated with each other to different extent. The percentage of A＊02：01 and A＊24：02 carriers were significantly higher in patients responding to any of the three proteins compared to the nonresponders. Conclusion： MAGE-A1, MAGE-A3, or SSX-2-specific T cell responses were detectable in a subgroup of NPC patients, the frequency and magnitude of which were correlated.展开更多
目的探讨趋化因子CXCL13对TNF-α诱导的人骨关节滑膜细胞调控细胞核因子-κB受体活化因子配体(RANKL)表达的影响。方法 (1)体外培养人骨关节滑膜细胞,并给予10μg/m L TNF-α处理,分别在培养0、6、12、24 h时采用免疫荧光法检测CXCL13...目的探讨趋化因子CXCL13对TNF-α诱导的人骨关节滑膜细胞调控细胞核因子-κB受体活化因子配体(RANKL)表达的影响。方法 (1)体外培养人骨关节滑膜细胞,并给予10μg/m L TNF-α处理,分别在培养0、6、12、24 h时采用免疫荧光法检测CXCL13表达。(2)人滑膜细胞给予10μg/m L TNF-α处理24 h,将培养液更换为含0、5、10、25 ng/m L CXCL13的培养液继续培养24 h,或将培养液更换为含25 ng/m L CXCL13的培养液分别作用0、1、3、6、24 h;以不加TNF-α及CXCL13处理的常规培养细胞作为对照细胞。收集各浓度、各时间点细胞,采用Western blotting法检测RANKL蛋白相对表达量。结果 (1)TNF-α作用0、6、12、24 h时细胞CXCL13相对表达量(荧光强度)分别为0.907±0.350、0.823±0.730、0.710±0.660、0.653±0.850,组间比较P均<0.05。(2)对照细胞RANKL蛋白相对表达量为0.956±0.014,25 ng/m L CXCL13处理0、1、3、6、24 h时RANKL蛋白相对表达量分别为1.543±0.047、1.366±0.026、0.883±0.026、0.367±0.034、0.246±0.015;0、5、10、25 ng/m L CXCL13作用24 h时RANKL蛋白相对表达量分别为0.287±0.007、0.189±0.008、0.069±0.004、0.022±0.002;上述各组、各时间及各浓度细胞比较P均<0.05。结论趋化因子CXCL13能够在一定浓度和时间内抑制TNF-α诱导的人骨关节滑膜细胞RANKL蛋白表达。展开更多
文摘Spermatogonial stem cells （SSCs） divide continuously to support spermatogenesis throughout postnatal life and transmit genetic information to the next generation. Here, we report the successful establishment of the method for the isolation and identification of human SSCs from testicular tissue, and to determine the culture conditions required to expand SSCs on human embryonic stem cell-derived fibroblast-like cells （hdFs）. Large-scale cultures of SSCs were maintained on hdF feeder layers and expanded in the presence of a combination of cytokines and glial cell line-derived neurotrophic factor for at least 2 months. Cell surface marker analysis showed that SSCs retained high levels of alkaline phosphatase activity and stained strongly for anti-stage-specific embryonic antigen （SSEA）-1, OCT4 and CD49f. They also expressed the genes OCT4, SOX3 and STRA8 as detected by reverse transcription polymerase chain reaction （RT-PCR） analysis. These data clearly illustrate a novel approach for the growth of human SSCs using hdFs as feeder cells, potentially eliminating xenogeneic contaminants. This system provides a new opportunity for the study of the regulatory mechanism of the ‘niche＇ that governs SSC self-renewal, and will be a valuable source of SSCs for potential clinical applications.
文摘Background： Development of innovative immunotherapy is imperative to improve the poor survival of the nasopharyngeal carcinoma （NPC） patients. In this study, we evaluated the T cell response to melanoma-associated antigen （MAGE）-A1, MAGE-A3, or synovial sarcoma X-2 （SSX-2） in the peripheral blood of treatment-naive NPC patients. The relationship of responses among the three proteins and the human leukocyte antigen （HLA）-A types were analyzed to provide evidence of designing novel therapy. Methods： Sixty-one NPC patients admitted into the Tumor Hospital affiliated to the Xinjiang Medical University between March 2015 and July 2016 were enrolled. Mononuclear cells were isolated from the peripheral blood before any treatment. HLA-A alleles were typed with Sanger sequence-based typing technique. The T cell response to the MAGE-A1, MAGE-A3, or SSX-2 was evaluated with the Enzyme-Linked ImmunoSpot assay. Mann-Whitney U-test was used to compare the T cell responses from different groups. Spearman＇s rank correlation was used to analyze the relationship of T cell responses. Results： HLA-A＊02：01, A＊02：07, and A＊24：02 were the three most frequent alleles （18.9%, 12.3%, and 11.5%, respectively） among the 22 detected alleles. 31.1%, 19.7%, and 16.4% of the patients displayed MAGE-A1, MAGE-A3, or SSX-2-specific T cell response, respectively. The magnitudes of response to the three proteins were 32.5, 38.0, and 28.7 SFC/106 peripheral blood mononuclear cells, respectively. The T cell response against the three proteins correlated with each other to different extent. The percentage of A＊02：01 and A＊24：02 carriers were significantly higher in patients responding to any of the three proteins compared to the nonresponders. Conclusion： MAGE-A1, MAGE-A3, or SSX-2-specific T cell responses were detectable in a subgroup of NPC patients, the frequency and magnitude of which were correlated.
文摘目的探讨趋化因子CXCL13对TNF-α诱导的人骨关节滑膜细胞调控细胞核因子-κB受体活化因子配体(RANKL)表达的影响。方法 (1)体外培养人骨关节滑膜细胞,并给予10μg/m L TNF-α处理,分别在培养0、6、12、24 h时采用免疫荧光法检测CXCL13表达。(2)人滑膜细胞给予10μg/m L TNF-α处理24 h,将培养液更换为含0、5、10、25 ng/m L CXCL13的培养液继续培养24 h,或将培养液更换为含25 ng/m L CXCL13的培养液分别作用0、1、3、6、24 h;以不加TNF-α及CXCL13处理的常规培养细胞作为对照细胞。收集各浓度、各时间点细胞,采用Western blotting法检测RANKL蛋白相对表达量。结果 (1)TNF-α作用0、6、12、24 h时细胞CXCL13相对表达量(荧光强度)分别为0.907±0.350、0.823±0.730、0.710±0.660、0.653±0.850,组间比较P均<0.05。(2)对照细胞RANKL蛋白相对表达量为0.956±0.014,25 ng/m L CXCL13处理0、1、3、6、24 h时RANKL蛋白相对表达量分别为1.543±0.047、1.366±0.026、0.883±0.026、0.367±0.034、0.246±0.015;0、5、10、25 ng/m L CXCL13作用24 h时RANKL蛋白相对表达量分别为0.287±0.007、0.189±0.008、0.069±0.004、0.022±0.002;上述各组、各时间及各浓度细胞比较P均<0.05。结论趋化因子CXCL13能够在一定浓度和时间内抑制TNF-α诱导的人骨关节滑膜细胞RANKL蛋白表达。
