INTRODUCTIONLiver fibrosis is a dynamic course leading tocirrhosis from a various chronic liver diseases. Thepathological basis of fibrosis is the disturbance ofproduction and degradation of the extracellularmatrix (E...INTRODUCTIONLiver fibrosis is a dynamic course leading tocirrhosis from a various chronic liver diseases. Thepathological basis of fibrosis is the disturbance ofproduction and degradation of the extracellularmatrix (ECM), which causes accumulation of ECMin the liver[1,2].展开更多
Collagen made a tremendous impact in the field of regenerative medicine as a bioactive material.For decades,collagen has been used not only as a scaffolding material but also as an active component in regulating cells...Collagen made a tremendous impact in the field of regenerative medicine as a bioactive material.For decades,collagen has been used not only as a scaffolding material but also as an active component in regulating cells’biological behavior and phenotype.However,animal-derived collagen as a major source suffered from problems of immunogenicity,risk of viral infection,and the unclear relationship between bioactive sequence and function.Recombinant humanized collagen(rhCol)provided alternatives for regenerative medicine with more controllable risks.However,the characterization of rhCol and the interaction between rhCol and cells still need further investigation,including cell behavior and phenotype.The current study preliminarily demonstrated that recombinant humanized collagen type III(rhCol III)conformed to the theoretical amino acid sequence and had an advanced structure resembling bovine collagen.Furthermore,rhCol III could facilitate basal biological behaviors of human skin fibroblasts,such as adhesion,proliferation and migration.rhCol III was beneficial for some extracellular matrix-expressing cell phenotypes.The study would shed light on the mechanism research of rhCol and cell interactions and further understanding of effectiveness in tissue regeneration.展开更多
目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组...目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组采用螺内酯双蒸水溶解,20 mg/(kg.d)灌胃,对照组和WKY组采用等容积双蒸水灌胃,连续16周。Westernblot方法分析心肌组织Ⅰ型胶原的水平;偏振光显微镜下观察Ⅰ、Ⅲ型胶原,图像分析系统分别计算Ⅰ、Ⅲ型胶原面积积分及Ⅰ/Ⅲ型胶原比值。结果:与WKY组比较,对照组心肌组织Ⅰ型胶原明显增多(1.87±0.2 vs 1.21±0.7,P<0.05),治疗16周,与对照组比较,螺内酯组心肌组织Ⅰ型胶原下降(1.42±0.05 vs 1.87±0.2),差异有统计学意义(P<0.05)。偏振光显微镜观察心肌Ⅰ、Ⅲ型胶原面积,与对照组比较,螺内酯组Ⅰ型胶原像素(6400±259 vs 12019±734)、Ⅰ/Ⅲ型胶原比值(15.64±1.34 vs 20.8±3.04)明显下降,差异有统计学意义(P<0.05),但三组间Ⅲ型胶原像素比较,差异未见有统计学意义(P>0.05)。结论:螺内酯减少SHR心肌Ⅰ型胶原的沉积及Ⅰ/Ⅲ型胶原比值,对Ⅲ型胶原无明显影响。展开更多
The calcium channel blocker,verapamil,has been shown to reduce scar formation by inhibiting fibroblast adhesion and proliferation in vitro.It was not clear whether topical application of verapamil after surgical repai...The calcium channel blocker,verapamil,has been shown to reduce scar formation by inhibiting fibroblast adhesion and proliferation in vitro.It was not clear whether topical application of verapamil after surgical repair of the nerve in vivo could inhibit the formation of excessive scar tissue.In this study,the right sciatic nerve of adult Sprague-Dawley rats was transected and sutured with No.10-0 suture.The stoma was wrapped with gelfoam soaked with verapamil solution for 4 weeks.Compared with the control group（stoma wrapped with gelfoam soaked with physiological saline）,the verapamil application inhibited the secretion of extracellular matrix from fibroblasts in vivo,suppressed type I and III collagen secretion and increased the total number of axons and the number of myelinated axons.These findings suggest that verapamil could reduce the formation of scar tissue and promote axon growth after peripheral nerve repair.展开更多
基金Project supported by the National Natural Science Foundation of China, No. 39500138
文摘INTRODUCTIONLiver fibrosis is a dynamic course leading tocirrhosis from a various chronic liver diseases. Thepathological basis of fibrosis is the disturbance ofproduction and degradation of the extracellularmatrix (ECM), which causes accumulation of ECMin the liver[1,2].
基金the National Key Research and Development Program of China(2018YFC1106200 and 2018YFC1106203)the National Natural Science Foundation of China(32071330).
文摘Collagen made a tremendous impact in the field of regenerative medicine as a bioactive material.For decades,collagen has been used not only as a scaffolding material but also as an active component in regulating cells’biological behavior and phenotype.However,animal-derived collagen as a major source suffered from problems of immunogenicity,risk of viral infection,and the unclear relationship between bioactive sequence and function.Recombinant humanized collagen(rhCol)provided alternatives for regenerative medicine with more controllable risks.However,the characterization of rhCol and the interaction between rhCol and cells still need further investigation,including cell behavior and phenotype.The current study preliminarily demonstrated that recombinant humanized collagen type III(rhCol III)conformed to the theoretical amino acid sequence and had an advanced structure resembling bovine collagen.Furthermore,rhCol III could facilitate basal biological behaviors of human skin fibroblasts,such as adhesion,proliferation and migration.rhCol III was beneficial for some extracellular matrix-expressing cell phenotypes.The study would shed light on the mechanism research of rhCol and cell interactions and further understanding of effectiveness in tissue regeneration.
文摘目的探讨六味地黄汤抗肾间质纤维化的作用机制。方法采用5/6肾切除法复制肾间质纤维化大鼠模型,随机分为假手术组、模型组、六味地黄汤组和依那普利组。六味地黄汤组予6.25 g/(kg·d)六味地黄汤灌胃,依那普利组予10 mg/(kg·d)马来酸依那普利悬浊液灌胃,假手术组和模型组予10 m L/(kg·d)蒸馏水灌胃,每日1次,连续12周。采用免疫组化法检测缺氧诱导因子-1α(HIF-1α)和Ⅰ、Ⅲ型胶原(CollⅠ、CollⅢ)在肾组织中的表达。结果与假手术组比较,模型组肾组织中HIF-1α、CollⅠ、CollⅢ的表达均明显升高(P<0.05);与模型组比较,六味地黄汤组和依那普利组肾组织中HIF-1α和CollⅠ、CollⅢ的表达均降低(P<0.05),且六味地黄汤组优于依那普利组(P<0.05)。结论六味地黄汤可能通过下调HIF-1α和CollⅠ、CollⅢ的表达,改善肾组织慢性缺氧,发挥抗肾间质纤维化的作用。
文摘目的:为探讨非选择性醛固酮受体拮抗剂螺内酯抗高血压心肌纤维化的机制,观测了螺内酯对自发性高血压大鼠(SHR)心肌组织Ⅰ、Ⅲ型胶原含量及比值的影响。方法:20只雄性SHR随机分为螺内酯组(10只)和对照组(10只),另设WKY组(7只)。螺内酯组采用螺内酯双蒸水溶解,20 mg/(kg.d)灌胃,对照组和WKY组采用等容积双蒸水灌胃,连续16周。Westernblot方法分析心肌组织Ⅰ型胶原的水平;偏振光显微镜下观察Ⅰ、Ⅲ型胶原,图像分析系统分别计算Ⅰ、Ⅲ型胶原面积积分及Ⅰ/Ⅲ型胶原比值。结果:与WKY组比较,对照组心肌组织Ⅰ型胶原明显增多(1.87±0.2 vs 1.21±0.7,P<0.05),治疗16周,与对照组比较,螺内酯组心肌组织Ⅰ型胶原下降(1.42±0.05 vs 1.87±0.2),差异有统计学意义(P<0.05)。偏振光显微镜观察心肌Ⅰ、Ⅲ型胶原面积,与对照组比较,螺内酯组Ⅰ型胶原像素(6400±259 vs 12019±734)、Ⅰ/Ⅲ型胶原比值(15.64±1.34 vs 20.8±3.04)明显下降,差异有统计学意义(P<0.05),但三组间Ⅲ型胶原像素比较,差异未见有统计学意义(P>0.05)。结论:螺内酯减少SHR心肌Ⅰ型胶原的沉积及Ⅰ/Ⅲ型胶原比值,对Ⅲ型胶原无明显影响。
基金supported by the Natural Science Foundation of Hubei Province of China,No.2011CDB392
文摘The calcium channel blocker,verapamil,has been shown to reduce scar formation by inhibiting fibroblast adhesion and proliferation in vitro.It was not clear whether topical application of verapamil after surgical repair of the nerve in vivo could inhibit the formation of excessive scar tissue.In this study,the right sciatic nerve of adult Sprague-Dawley rats was transected and sutured with No.10-0 suture.The stoma was wrapped with gelfoam soaked with verapamil solution for 4 weeks.Compared with the control group（stoma wrapped with gelfoam soaked with physiological saline）,the verapamil application inhibited the secretion of extracellular matrix from fibroblasts in vivo,suppressed type I and III collagen secretion and increased the total number of axons and the number of myelinated axons.These findings suggest that verapamil could reduce the formation of scar tissue and promote axon growth after peripheral nerve repair.
