Objective:Large segmental bone defect repair remains a clinical and scientific challenge with increasing interest focusing on combining gene transfection with tissue engineering techniques.The aim of this study is to ...Objective:Large segmental bone defect repair remains a clinical and scientific challenge with increasing interest focusing on combining gene transfection with tissue engineering techniques.The aim of this study is to investigate the effect of connective tissue growth factor(CTGF) on the proliferation and osteogenic differentiation of the bone marrow mesenchymal stem cells(MSCs).Methods:A CTGF-expressing plasmid(pCTGF) was constructed and transfected into MSCs.Then expressions of bone morphogenesis-related genes,proliferation rate,alkaline phosphatase activity,and mineralization were examined to evaluate the osteogenic potential of the CTGF gene-modified MSCs.Results:Overexpression of CTGF was confirmed in pCTGF-MSCs.pCTGF transfection significantly enhanced the proliferation rates of pCTGF-MSCs(P<0.05).CTGF induced a 7.5-fold increase in cell migration over control(P<0.05).pCTGF transfection enhanced the expression of bone matrix proteins,such as bone sialo-protein,osteocalcin,and collagen type I in MSCs.The levels of alkaline phosphatase(ALP) activities of pCTGF-MSCs at the 1st and 2nd weeks were 4.0-and 3.0-fold higher than those of MSCs cultured in OS-medium,significantly higher than those of mock-MSCs and normal control MSCs(P<0.05).Overexpression of CTGF in MSCs enhanced the capability to form mineralized nodules.Conclusion:Overexpression of CTGF could improve the osteogenic differentiation ability of MSCs,and the CTGF gene-modified MSCs are potential as novel cell resources of bone tissue engineering.展开更多
OBJECTIVE:To determine the effect of Houttuynia cordata Aetherolea on connective tissue growth factor and adiponectin in a rat model of diabetes mellitus(DM).METHODS:DM was induced in rats using streptozotocin(STZ) an...OBJECTIVE:To determine the effect of Houttuynia cordata Aetherolea on connective tissue growth factor and adiponectin in a rat model of diabetes mellitus(DM).METHODS:DM was induced in rats using streptozotocin(STZ) and high glucose-lipid animal feed.Animals were then treated with Houttuynia cordata Aetherolea for 8 weeks.Changes in connective tissue growth factor and adiponectin levels in rats were observed.RESULTS:Connective tissue growth factor and adiponectin levels in rats with DM improved after Houttuynia cordata Aetherolea treatment.CONCLUSION:Houttuynia cordata Aetherolea had a positive effect on rats with DM by reducing levels of connective tissue growth factor and increasing adiponectin levels.展开更多
目的探讨血管内皮生长因子-C(VEGF-C)、结缔组织生长因子(CTGF)m RNA在急性白血病患者骨髓表达及治疗前后变化情况,研究其在白血病发生发展、浸润转移中的相互作用和临床意义。方法 71例初发急性白血病患者,对照组30例缺铁性贫血患者。...目的探讨血管内皮生长因子-C(VEGF-C)、结缔组织生长因子(CTGF)m RNA在急性白血病患者骨髓表达及治疗前后变化情况,研究其在白血病发生发展、浸润转移中的相互作用和临床意义。方法 71例初发急性白血病患者,对照组30例缺铁性贫血患者。收集研究对象骨髓液单个核细胞,应用Real-time PCR方法对VEGF-C及CTGF m RNA表达水平进行检测。结果初发急性白血病患者骨髓中VEGF-C、CTGF m RNA表达明显高于对照组,两者呈正相关(r=0.709,P<0.05)。经1周期化疗后,达完全缓解患者及部分缓解患者与未治疗时比较,VEGF-C、CTGF m RNA表达水平明显降低(P<0.05),未缓解患者与初发时比较,差异无统计学意义(P>0.05)。VEGF-C、CTGF m RNA的表达在急性白血病骨髓增生不同程度各组及是否伴髓外浸润各组之间比较,差异有统计学意义(P<0.05)。结论 VEGF-C、CTGF在急性白血病发生发展中具有协同作用,共同参与了白血病的发生、浸润及转移,并且与白血病预后相关。展开更多
基金supported by the National Basic Research Program (973) of China(No.2005CB623900)
文摘Objective:Large segmental bone defect repair remains a clinical and scientific challenge with increasing interest focusing on combining gene transfection with tissue engineering techniques.The aim of this study is to investigate the effect of connective tissue growth factor(CTGF) on the proliferation and osteogenic differentiation of the bone marrow mesenchymal stem cells(MSCs).Methods:A CTGF-expressing plasmid(pCTGF) was constructed and transfected into MSCs.Then expressions of bone morphogenesis-related genes,proliferation rate,alkaline phosphatase activity,and mineralization were examined to evaluate the osteogenic potential of the CTGF gene-modified MSCs.Results:Overexpression of CTGF was confirmed in pCTGF-MSCs.pCTGF transfection significantly enhanced the proliferation rates of pCTGF-MSCs(P<0.05).CTGF induced a 7.5-fold increase in cell migration over control(P<0.05).pCTGF transfection enhanced the expression of bone matrix proteins,such as bone sialo-protein,osteocalcin,and collagen type I in MSCs.The levels of alkaline phosphatase(ALP) activities of pCTGF-MSCs at the 1st and 2nd weeks were 4.0-and 3.0-fold higher than those of MSCs cultured in OS-medium,significantly higher than those of mock-MSCs and normal control MSCs(P<0.05).Overexpression of CTGF in MSCs enhanced the capability to form mineralized nodules.Conclusion:Overexpression of CTGF could improve the osteogenic differentiation ability of MSCs,and the CTGF gene-modified MSCs are potential as novel cell resources of bone tissue engineering.
基金Supported by the Project of Natural Foundation of Shanghai Science and Technology Committee (No. 10Zr28600)
文摘OBJECTIVE:To determine the effect of Houttuynia cordata Aetherolea on connective tissue growth factor and adiponectin in a rat model of diabetes mellitus(DM).METHODS:DM was induced in rats using streptozotocin(STZ) and high glucose-lipid animal feed.Animals were then treated with Houttuynia cordata Aetherolea for 8 weeks.Changes in connective tissue growth factor and adiponectin levels in rats were observed.RESULTS:Connective tissue growth factor and adiponectin levels in rats with DM improved after Houttuynia cordata Aetherolea treatment.CONCLUSION:Houttuynia cordata Aetherolea had a positive effect on rats with DM by reducing levels of connective tissue growth factor and increasing adiponectin levels.
文摘目的探讨血管内皮生长因子-C(VEGF-C)、结缔组织生长因子(CTGF)m RNA在急性白血病患者骨髓表达及治疗前后变化情况,研究其在白血病发生发展、浸润转移中的相互作用和临床意义。方法 71例初发急性白血病患者,对照组30例缺铁性贫血患者。收集研究对象骨髓液单个核细胞,应用Real-time PCR方法对VEGF-C及CTGF m RNA表达水平进行检测。结果初发急性白血病患者骨髓中VEGF-C、CTGF m RNA表达明显高于对照组,两者呈正相关(r=0.709,P<0.05)。经1周期化疗后,达完全缓解患者及部分缓解患者与未治疗时比较,VEGF-C、CTGF m RNA表达水平明显降低(P<0.05),未缓解患者与初发时比较,差异无统计学意义(P>0.05)。VEGF-C、CTGF m RNA的表达在急性白血病骨髓增生不同程度各组及是否伴髓外浸润各组之间比较,差异有统计学意义(P<0.05)。结论 VEGF-C、CTGF在急性白血病发生发展中具有协同作用,共同参与了白血病的发生、浸润及转移,并且与白血病预后相关。
