CD34+ cells from human umbilical cord blood were purified by Dynal beads M-450 CD34 immunoselection system and cultured in the presence of various cytokines alone or in combination, including stem cell factor (SCF), i...CD34+ cells from human umbilical cord blood were purified by Dynal beads M-450 CD34 immunoselection system and cultured in the presence of various cytokines alone or in combination, including stem cell factor (SCF), interleukin-6 (IL-6) and erythropoietin (EPO). The results revealed that: (D In methylcellulose culture, the plating efficiencies of purified cord blood CD34+ cells were much different when stimulated by various cytokines. IL-6 alone had the lowest colo-ny yield, while the combination of SCF, IL-6 and EPO had the highest yield. ② In the suspension culture, IL-6 alone or IL-6 + EPO had little expanding effect on cord blood CD34+ celis, the other cytokine combinations could expand cord blood CD34+ celis at different Ievels. Among them, the combination of SCF, IL-6 and EPO had the maximal expanding effect on cord blood CD34+ celis, the number of progenitor celis peaked at day 21, about 29-fold increase and nucleated celis increased approximately 3676-fold at day 28. The expanding effect of展开更多
目的:探讨IL-34对ApoE-/-小鼠动脉粥样硬化(AS)和炎症反应的影响。方法:给予高脂饲料喂养的雄性ApoE-/-小鼠20只分为两组,每组10只。实验组隔天1次腹腔注射200 ng重组IL-34(rIL-34),对照组隔天1次腹腔注射0.3 mL PBS,干预12周。检测小...目的:探讨IL-34对ApoE-/-小鼠动脉粥样硬化(AS)和炎症反应的影响。方法:给予高脂饲料喂养的雄性ApoE-/-小鼠20只分为两组,每组10只。实验组隔天1次腹腔注射200 ng重组IL-34(rIL-34),对照组隔天1次腹腔注射0.3 mL PBS,干预12周。检测小鼠血清总胆固醇(TC),甘油三酯(TG)及高密度脂蛋白胆固醇(HDL-C);油红O染色评估小鼠主动脉AS形成情况;免疫组化法检测主动脉根部斑块炎症细胞(CD3+T细胞和Mac-3+巨噬细胞)浸润情况;流式细胞术检测脾脏T细胞亚群;ELISA法和Bio-Plex系统检测小鼠血清细胞炎性因子IL-1β、TNF-α、IFN-γ、IL-6、IL-4、IL-10、TGF-β1和IL-17A水平;qRT-PCR法检测小鼠主动脉弓上述细胞因子mRNA的表达水平。结果:两组小鼠血脂水平差异无统计学意义(P>0.05))。与对照组比较,实验组小鼠血清IL-34水平增加,主动脉和主动脉根部斑块面积增加,斑块内CD3+T细胞和Mac-3+巨噬细胞浸润增多,脾脏Th17细胞亚群比例升高,血清IL-1β、TNF-α、IFN-γ、IL-6和IL-17A水平升高,主动脉弓IL-1β、TNF-α、IFN-γ、IL-6和IL-17A mRNA表达水平升高(P均<0.05)。结论:IL-34可升高脾脏Th17细胞亚群比例,促进炎症因子表达,有助于小鼠AS形成。展开更多
To clarify the hematopoietic potential of various sub-classes of human hematopoietic progenitor cells, we used a multicolor staining protocol in conjunction with anti-CD34 and -CD38 McAb. We characterized two cell fra...To clarify the hematopoietic potential of various sub-classes of human hematopoietic progenitor cells, we used a multicolor staining protocol in conjunction with anti-CD34 and -CD38 McAb. We characterized two cell fractions in CD34+cells with or without CD38 expression. A clonogenic assay showed that most CFC were present in CD34+CD38+ population. Morphologic analysis showed that blast-like cells were more enriched in the CD34+CD38 fraction. To clarify the biologic differences between both fractions, we examined the more primitive progenitor cell function by assessing long-term culture-initiating cells (LTC-IC) on the stromal cells. At the first two weeks, more CF.C harvested from the culture in the fractions initiated with both populations. However, more LTC-IC were present during weeks 4 to 12 in the CD34+CD38- population. These results indicate the primitive progenitors are more enriched in CD34+CD38 population than in CD34+CD38+ cells.展开更多
Cadmium sulfide(CdS)is an n-type semiconductor with excellent electrical conductivity that is widely used as an electron transport material(ETM)in solar cells.At present,numerous methods for preparing CdS thin films h...Cadmium sulfide(CdS)is an n-type semiconductor with excellent electrical conductivity that is widely used as an electron transport material(ETM)in solar cells.At present,numerous methods for preparing CdS thin films have emerged,among which magnetron sputtering(MS)is one of the most commonly used vacuum techniques.For this type of technique,the substrate temperature is one of the key deposition parameters that affects the interfacial properties between the target film and substrate,determining the specific growth habits of the films.Herein,the effect of substrate temperature on the microstructure and electrical properties of magnetron-sputtered CdS(MS-CdS)films was studied and applied for the first time in hydrothermally deposited antimony selenosulfide(Sb_(2)(S,Se)_(3))solar cells.Adjusting the substrate temperature not only results in the design of the flat and dense film with enhanced crystallinity but also leads to the formation of an energy level arrangement with a Sb_(2)(S,Se)_(3)layer that is more favorable for electron transfer.In addition,we developed an oxygen plasma treatment for CdS,reducing the parasitic absorption of the device and resulting in an increase in the short-circuit current density of the solar cell.This study demonstrates the feasibility of MS-CdS in the fabrication of hydrothermal Sb_(2)(S,Se)_(3)solar cells and provides interface optimization strategies to improve device performance.展开更多
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
文摘CD34+ cells from human umbilical cord blood were purified by Dynal beads M-450 CD34 immunoselection system and cultured in the presence of various cytokines alone or in combination, including stem cell factor (SCF), interleukin-6 (IL-6) and erythropoietin (EPO). The results revealed that: (D In methylcellulose culture, the plating efficiencies of purified cord blood CD34+ cells were much different when stimulated by various cytokines. IL-6 alone had the lowest colo-ny yield, while the combination of SCF, IL-6 and EPO had the highest yield. ② In the suspension culture, IL-6 alone or IL-6 + EPO had little expanding effect on cord blood CD34+ celis, the other cytokine combinations could expand cord blood CD34+ celis at different Ievels. Among them, the combination of SCF, IL-6 and EPO had the maximal expanding effect on cord blood CD34+ celis, the number of progenitor celis peaked at day 21, about 29-fold increase and nucleated celis increased approximately 3676-fold at day 28. The expanding effect of
文摘目的:探讨IL-34对ApoE-/-小鼠动脉粥样硬化(AS)和炎症反应的影响。方法:给予高脂饲料喂养的雄性ApoE-/-小鼠20只分为两组,每组10只。实验组隔天1次腹腔注射200 ng重组IL-34(rIL-34),对照组隔天1次腹腔注射0.3 mL PBS,干预12周。检测小鼠血清总胆固醇(TC),甘油三酯(TG)及高密度脂蛋白胆固醇(HDL-C);油红O染色评估小鼠主动脉AS形成情况;免疫组化法检测主动脉根部斑块炎症细胞(CD3+T细胞和Mac-3+巨噬细胞)浸润情况;流式细胞术检测脾脏T细胞亚群;ELISA法和Bio-Plex系统检测小鼠血清细胞炎性因子IL-1β、TNF-α、IFN-γ、IL-6、IL-4、IL-10、TGF-β1和IL-17A水平;qRT-PCR法检测小鼠主动脉弓上述细胞因子mRNA的表达水平。结果:两组小鼠血脂水平差异无统计学意义(P>0.05))。与对照组比较,实验组小鼠血清IL-34水平增加,主动脉和主动脉根部斑块面积增加,斑块内CD3+T细胞和Mac-3+巨噬细胞浸润增多,脾脏Th17细胞亚群比例升高,血清IL-1β、TNF-α、IFN-γ、IL-6和IL-17A水平升高,主动脉弓IL-1β、TNF-α、IFN-γ、IL-6和IL-17A mRNA表达水平升高(P均<0.05)。结论:IL-34可升高脾脏Th17细胞亚群比例,促进炎症因子表达,有助于小鼠AS形成。
文摘To clarify the hematopoietic potential of various sub-classes of human hematopoietic progenitor cells, we used a multicolor staining protocol in conjunction with anti-CD34 and -CD38 McAb. We characterized two cell fractions in CD34+cells with or without CD38 expression. A clonogenic assay showed that most CFC were present in CD34+CD38+ population. Morphologic analysis showed that blast-like cells were more enriched in the CD34+CD38 fraction. To clarify the biologic differences between both fractions, we examined the more primitive progenitor cell function by assessing long-term culture-initiating cells (LTC-IC) on the stromal cells. At the first two weeks, more CF.C harvested from the culture in the fractions initiated with both populations. However, more LTC-IC were present during weeks 4 to 12 in the CD34+CD38- population. These results indicate the primitive progenitors are more enriched in CD34+CD38 population than in CD34+CD38+ cells.
基金supported by the National Natural Science Foundation of China(22275180)the National Key Research and Development Program of China(2019YFA0405600)the Collaborative Innovation Program of Hefei Science Center,CAS,and the University Synergy Innovation Program of Anhui Province(GXXT-2023-031).
文摘Cadmium sulfide(CdS)is an n-type semiconductor with excellent electrical conductivity that is widely used as an electron transport material(ETM)in solar cells.At present,numerous methods for preparing CdS thin films have emerged,among which magnetron sputtering(MS)is one of the most commonly used vacuum techniques.For this type of technique,the substrate temperature is one of the key deposition parameters that affects the interfacial properties between the target film and substrate,determining the specific growth habits of the films.Herein,the effect of substrate temperature on the microstructure and electrical properties of magnetron-sputtered CdS(MS-CdS)films was studied and applied for the first time in hydrothermally deposited antimony selenosulfide(Sb_(2)(S,Se)_(3))solar cells.Adjusting the substrate temperature not only results in the design of the flat and dense film with enhanced crystallinity but also leads to the formation of an energy level arrangement with a Sb_(2)(S,Se)_(3)layer that is more favorable for electron transfer.In addition,we developed an oxygen plasma treatment for CdS,reducing the parasitic absorption of the device and resulting in an increase in the short-circuit current density of the solar cell.This study demonstrates the feasibility of MS-CdS in the fabrication of hydrothermal Sb_(2)(S,Se)_(3)solar cells and provides interface optimization strategies to improve device performance.
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。
