目的:观察蝎毒多肽提取物(polypeptide extract from scorpion venom,PESV)对H22肝癌荷瘤小鼠化疗期间再增殖的抑制作用并探讨可能的机制。方法:96只Balb/c小鼠皮下接种小鼠肝癌H22细胞,随机分为模型组、PESV高、低剂量组和衙瘤...目的:观察蝎毒多肽提取物(polypeptide extract from scorpion venom,PESV)对H22肝癌荷瘤小鼠化疗期间再增殖的抑制作用并探讨可能的机制。方法:96只Balb/c小鼠皮下接种小鼠肝癌H22细胞,随机分为模型组、PESV高、低剂量组和衙瘤对照组。以5.Fu对荷瘤小鼠进行化疗建立再增殖模型。按不同的用药方法对4组小鼠进行干预,每周测量肿瘤体积2次。各组每7d处死6只小鼠,实验共进行35d。以免疫组织化学方法检测各组肿瘤组织CD105,PCNA,VEGF,PDGF蛋白水半表达。以CD105标记微血管,计算微血管密度(MVD)。结果:荷瘤对照组肿瘤体积在13—24d增加迅速,荷瘤对照组小鼠在第27天全部死亡,模型组肿瘤体积在17d前增长较快,在第17~22天增加较慢,之后体积增加又较快,在第31天全部死亡。PESV高、低剂量组肿瘤体积全程缓慢增加,体积在17d以后显著低于模型组,PESV高低剂量组之间仅在第17天存在差异(P〈0.05)。免疫组织化学检测湿示,模型组肿瘤组织第31天PCNA表达水平高于第21,28天(P〈0.01),PESV高、低剂量组表达水平显著低于模型组(P〈0.01),PESV高、低剂量组仅在第17天存在显著差异(P〈0.05)。免疫组织化学检测显示,与PESV高、低剂量组相比,模型组CD105-MVD在第21,28天(P〈0.05),第35天(P〈0.01)存在显著差异,PESV高低剂量组之间无差别。模型组VEGF表达第35天高于第21,28天(P〈0.05),PESV高、低剂量VEGF表达在第21,28,35天表达水平均显著低于模型组(P〈0.01),PESV高低剂量组无差别。模型组肿瘤PDGF表达水平逐渐下降,PESV高,低组存第21天表达水平最低,之后逐渐增高,PESV高低剂量组之间在第35天存在显著差异(P〈0.01)。相关性分析显示,肿瘤组织VEGF表达水平与肿瘤组织CD105-MVD呈正相关(r=0.669)。结论:PESV可抑制H展开更多
目的通过频繁单采血小板献血者的血小板数(Plt)、血小板生成素(TPO)及血小板衍生生长因子(PDGF)等因子的变化,探讨频采对献血者巨核细胞的影响。方法随机选取30名连续单采血小板时间>1年(2014年1月-2015年5月),每次间隔15-30 d的献...目的通过频繁单采血小板献血者的血小板数(Plt)、血小板生成素(TPO)及血小板衍生生长因子(PDGF)等因子的变化,探讨频采对献血者巨核细胞的影响。方法随机选取30名连续单采血小板时间>1年(2014年1月-2015年5月),每次间隔15-30 d的献血者作为观察组,30名首次单采血小板的献血者作为对照组。献血前后检测其血常规及TPO、PDGF浓度。结果 1)观察组单采血小板前Plt较对照组明显增多,平均血小板体积(MPV)减小,血小板体积分布宽度(PDW)增大,TPO和PDGF浓度低于对照组:Plt(272.97±42.84)×109/L vs(248.70±31.94)×109/L(P<0.05),MPV(9.91±0.46)f L vs(10.31±0.72)f L(P<0.05),PDW(11.53±0.88)f L vs(10.95±0.77)f L(P<0.01),TPO(66.39±23.26)pg/m L vs(80.42±23.95)pg/m L(P<0.05),PDGF(89.78±16.22)pg/m L vs(99.80±21.41)pg/m L(P<0.05);2)观察组与对照组单采血小板后TPO均较采集前下降:观察组(66.39±23.26)pg/m L vs(57.80±21.11)pg/m L(P<0.01),对照组(80.42±23.95)pg/m L vs(87.92±18.18)pg/m L(P<0.01);3)观察组与对照组采集血小板后PDGF均较采集前下降:观察组(89.78±16.22)pg/m L vs(80.94±14.15)pg/m L(P<0.01),对照组(99.80±21.41)pg/m L vs(87.92±18.18)pg/m L(P<0.01)。结论频采对献血者巨核细胞的刺激增强,使其血小板数更高,消耗更多的TPO及PDGF,因此对频采献血者应关注相关因子的变化,以避免对献血者的健康造成损害。展开更多
Objective: To explore the feasibility of using regenerated silk fibroin membrane to construct artificial skin substitutes for wound healing, it is necessary to evaluate its cytocompatibility. Methods: The effects of...Objective: To explore the feasibility of using regenerated silk fibroin membrane to construct artificial skin substitutes for wound healing, it is necessary to evaluate its cytocompatibility. Methods: The effects of regenerated silk fibroin film on cytotoxicity, adhesion, cell cycle, and apoptosis of L929 cells, growth and vascular endothelial growth factor (VEGF) expression of ECV304 cells, and VEGF, angiopoietin-1 (Ang-1), platelet-derived growth factor (PDGF) and fibroblast growth factor 2 (FGF2) expression of WI-38 cells were assessed by 3-(4,5)-dimethylthiahiazo (-z-yl)-3,5-di-phenytetrazoliumromide (MTT) assay, viable cell counting, flow cytometry (FCM), and enzyme-linked immunosorbant assay (ELISA). Results: We showed that the regenerated silk fibroin film was not cytotoxic to L929 cells and had no adverse influence on their adhesion, cell cycle or apoptosis; it had no adverse influence on the growth and VEGF secretion of ECV304 cells and no effect on the secretion of VEGF, Ang-1, PDGF and FGF2 by WI-38 cells. Conclusion: The regenerated silk fibroin film should be an excellent biomaterial with good cytocompatibility, providing a framework for reparation after trauma in clinical applications.展开更多
文摘目的:观察蝎毒多肽提取物(polypeptide extract from scorpion venom,PESV)对H22肝癌荷瘤小鼠化疗期间再增殖的抑制作用并探讨可能的机制。方法:96只Balb/c小鼠皮下接种小鼠肝癌H22细胞,随机分为模型组、PESV高、低剂量组和衙瘤对照组。以5.Fu对荷瘤小鼠进行化疗建立再增殖模型。按不同的用药方法对4组小鼠进行干预,每周测量肿瘤体积2次。各组每7d处死6只小鼠,实验共进行35d。以免疫组织化学方法检测各组肿瘤组织CD105,PCNA,VEGF,PDGF蛋白水半表达。以CD105标记微血管,计算微血管密度(MVD)。结果:荷瘤对照组肿瘤体积在13—24d增加迅速,荷瘤对照组小鼠在第27天全部死亡,模型组肿瘤体积在17d前增长较快,在第17~22天增加较慢,之后体积增加又较快,在第31天全部死亡。PESV高、低剂量组肿瘤体积全程缓慢增加,体积在17d以后显著低于模型组,PESV高低剂量组之间仅在第17天存在差异(P〈0.05)。免疫组织化学检测湿示,模型组肿瘤组织第31天PCNA表达水平高于第21,28天(P〈0.01),PESV高、低剂量组表达水平显著低于模型组(P〈0.01),PESV高、低剂量组仅在第17天存在显著差异(P〈0.05)。免疫组织化学检测显示,与PESV高、低剂量组相比,模型组CD105-MVD在第21,28天(P〈0.05),第35天(P〈0.01)存在显著差异,PESV高低剂量组之间无差别。模型组VEGF表达第35天高于第21,28天(P〈0.05),PESV高、低剂量VEGF表达在第21,28,35天表达水平均显著低于模型组(P〈0.01),PESV高低剂量组无差别。模型组肿瘤PDGF表达水平逐渐下降,PESV高,低组存第21天表达水平最低,之后逐渐增高,PESV高低剂量组之间在第35天存在显著差异(P〈0.01)。相关性分析显示,肿瘤组织VEGF表达水平与肿瘤组织CD105-MVD呈正相关(r=0.669)。结论:PESV可抑制H
文摘目的通过频繁单采血小板献血者的血小板数(Plt)、血小板生成素(TPO)及血小板衍生生长因子(PDGF)等因子的变化,探讨频采对献血者巨核细胞的影响。方法随机选取30名连续单采血小板时间>1年(2014年1月-2015年5月),每次间隔15-30 d的献血者作为观察组,30名首次单采血小板的献血者作为对照组。献血前后检测其血常规及TPO、PDGF浓度。结果 1)观察组单采血小板前Plt较对照组明显增多,平均血小板体积(MPV)减小,血小板体积分布宽度(PDW)增大,TPO和PDGF浓度低于对照组:Plt(272.97±42.84)×109/L vs(248.70±31.94)×109/L(P<0.05),MPV(9.91±0.46)f L vs(10.31±0.72)f L(P<0.05),PDW(11.53±0.88)f L vs(10.95±0.77)f L(P<0.01),TPO(66.39±23.26)pg/m L vs(80.42±23.95)pg/m L(P<0.05),PDGF(89.78±16.22)pg/m L vs(99.80±21.41)pg/m L(P<0.05);2)观察组与对照组单采血小板后TPO均较采集前下降:观察组(66.39±23.26)pg/m L vs(57.80±21.11)pg/m L(P<0.01),对照组(80.42±23.95)pg/m L vs(87.92±18.18)pg/m L(P<0.01);3)观察组与对照组采集血小板后PDGF均较采集前下降:观察组(89.78±16.22)pg/m L vs(80.94±14.15)pg/m L(P<0.01),对照组(99.80±21.41)pg/m L vs(87.92±18.18)pg/m L(P<0.01)。结论频采对献血者巨核细胞的刺激增强,使其血小板数更高,消耗更多的TPO及PDGF,因此对频采献血者应关注相关因子的变化,以避免对献血者的健康造成损害。
基金supported by the National Basic Research Program (973) of China (No.2005CB623906)the Medical Development Foundation of Soochow University (No.EE134702),China
文摘Objective: To explore the feasibility of using regenerated silk fibroin membrane to construct artificial skin substitutes for wound healing, it is necessary to evaluate its cytocompatibility. Methods: The effects of regenerated silk fibroin film on cytotoxicity, adhesion, cell cycle, and apoptosis of L929 cells, growth and vascular endothelial growth factor (VEGF) expression of ECV304 cells, and VEGF, angiopoietin-1 (Ang-1), platelet-derived growth factor (PDGF) and fibroblast growth factor 2 (FGF2) expression of WI-38 cells were assessed by 3-(4,5)-dimethylthiahiazo (-z-yl)-3,5-di-phenytetrazoliumromide (MTT) assay, viable cell counting, flow cytometry (FCM), and enzyme-linked immunosorbant assay (ELISA). Results: We showed that the regenerated silk fibroin film was not cytotoxic to L929 cells and had no adverse influence on their adhesion, cell cycle or apoptosis; it had no adverse influence on the growth and VEGF secretion of ECV304 cells and no effect on the secretion of VEGF, Ang-1, PDGF and FGF2 by WI-38 cells. Conclusion: The regenerated silk fibroin film should be an excellent biomaterial with good cytocompatibility, providing a framework for reparation after trauma in clinical applications.