Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done prima...Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done primary culture to detect the distinct concentrations of TGF-P and rhBMF2 on its proliferation, alkaline phosphatase (ALP) activity, osteocalcin (OC) synthesis and formation of the minerali-zed nodules, respectively. Results TGF-β (5～100ng/ml) significantly stimulated the proliferation of HPDLFs. The ALP activity of HPDLFs was evaluated evidently by 5ng/ml TGF-β. TGF-β( 0. 5 ～ 100ng/ml) had no effects on OC synthesis and formation of the mineralized nodules of HPDLFs. rhBMP2 (0. 25～2mg/ ml) had no remarkable effect on the proliferation of HPDLFs. The ALP activity, OC synthesis and forma-tion of the mineralized nodules of HPDLFs were significantly stimulated by 0. 5～ 2mg /ml rhBMP2. Conclusion The effects of TGF-β and rhBMP2 on HPDLFs are dose-dependent. TGF-P can stimulate HPDLFs to express the early marker of osteoblastic phenotype, and it lacks the ability to promote maturation of the osteogenic phenotype. rhBMP2 can not only stimulate the expression but also promote the maturation of osteoblas-tic phenotype of HPDLFs.展开更多
The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of t...The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of this residue including charge on the mitogenic activity of hbFGF.Herein,this basic residue was replaced with neutral glutamine residue and acidic glutamic acid residue to construct mutants hbFGF^(K119Q) and hbFGF^(K119E),respectively.The mutants were produced by BL21(DE3)/pET3c expression system...展开更多
Objective: To investigate the effect of recombinant human basic fibroblast growth factor ( rhbFGF) on angiogenesis during mandible fracture healing in rabbit.Methods: Fifty adult white rabbits were used for animal mod...Objective: To investigate the effect of recombinant human basic fibroblast growth factor ( rhbFGF) on angiogenesis during mandible fracture healing in rabbit.Methods: Fifty adult white rabbits were used for animal model and randomly divided into a control group (25 rabbits) and an experimental group (25 rabbits). The membranous complex of rhbFGF and bovine type I collagen was prepared and implanted into the rabbit mandible fracture site under periosteum. The animals were sacrificed on 7, 14, 28, 56 and 84 days respectively after operation and the whole mandibles were harvested. The expression of factor Vm related antigen (F8-RA) in callus was examined with immimohistochemical staining.Results: The amounts of microvascular formation in calluses in the rhbFGF-treating group on days 7, 14, 28 and 56 were more than those of the control group (P < 0.01).Conclusions: The results indicated that rhbFGF could stimulate microvascular formation during mandible fracture healing in rabbits.展开更多
目的研究重组人酸性成纤维细胞生长因子(recombinant human acidic fibroblast growth factor,rh-aFGF)卡波姆940凝胶对糖尿病大鼠皮肤创伤修复作用。方法使用STZ诱导产生SD大鼠糖尿病模型,建立全层皮肤切除和烫伤两种皮肤创伤模型,设...目的研究重组人酸性成纤维细胞生长因子(recombinant human acidic fibroblast growth factor,rh-aFGF)卡波姆940凝胶对糖尿病大鼠皮肤创伤修复作用。方法使用STZ诱导产生SD大鼠糖尿病模型,建立全层皮肤切除和烫伤两种皮肤创伤模型,设置对照组、赋形剂组、90 AU rh-aFGF凝胶组和270 AU rh-aFGF凝胶组4个实验组。用创伤面积和愈合速率评价各组疗效;HE染色观察创面中成纤维细胞、肌成纤维细胞、胶原纤维和毛细血管生长情况;半定量评分评价rh-aFGF诱导的上述指标生长情况。结果 rh-aFGF卡波姆940凝胶明显减少糖尿病SD大鼠全层皮肤切除和烫伤模型的皮肤损伤面积(P<0.05),促进其创伤愈合速率(P<0.05)。HE染色结果表明,rh-aFGF卡波姆凝胶明显促进成纤维细胞和胶原纤维增殖评分(P<0.05)。结论 rh-aFGF卡波姆凝胶可能在一定程度上保护创面微环境和保护rhaFGF发挥生物学活性,促进成纤维细胞增殖和胶原纤维沉积,从而促进糖尿病SD大鼠皮肤创伤愈合过程,有望成为一种治疗糖尿病溃疡的新制剂。展开更多
OBJECTIVE: To evaluate the safety and efficacy of topical application of recombinant bovine basic fibroblast growth factor (rbFGF) on the healing of chronic cutaneous wounds. METHODS: Twenty-eight patients with thirty...OBJECTIVE: To evaluate the safety and efficacy of topical application of recombinant bovine basic fibroblast growth factor (rbFGF) on the healing of chronic cutaneous wounds. METHODS: Twenty-eight patients with thirty-three chronic cutaneous wounds resulting from trauma, diabetes mellitus, pressure sore and radiation injuries were enrolled in this prospective, open-label crossover trial. Prior to treatment with rbFGF, all wounds failed to heal with conventional therapies within 4 weeks. All wounds were locally treated with rbFGF at a dose of 150 AU/cm(2). Healing time and the quality of wounds were used to evaluate the efficacy of the treatment. RESULTS: Healing of all chronic wounds was expedited. During the study, eighteen wounds completely healed within 2 weeks, four healed within 3 weeks, and another eight completely healed within 4 weeks. Only three wounds failed to heal within 4 weeks, but healed at 30, 40 and 42 days after treatment with rbFGF. Thus, compared with conventional therapies, the effective rate of rbFGF treatment within 4 weeks was 90.9%. Histological assessment showed more abundant capillary sprouts or tubes and that fibroblasts were differentiated in wounds treated with rbFGF. No adverse side effects related to basic fibroblast growth factor were observed. CONCLUSIONS: Our results indicate that rbFGF could be used to accelerate healing in chronic wounds. It is our belief that this may be a more effective method of chronic wound management.展开更多
基金the National Natural Science Foundation of China (30000191), China Postdoctoral Science Foundation (1999- 17) and S
文摘Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done primary culture to detect the distinct concentrations of TGF-P and rhBMF2 on its proliferation, alkaline phosphatase (ALP) activity, osteocalcin (OC) synthesis and formation of the minerali-zed nodules, respectively. Results TGF-β (5～100ng/ml) significantly stimulated the proliferation of HPDLFs. The ALP activity of HPDLFs was evaluated evidently by 5ng/ml TGF-β. TGF-β( 0. 5 ～ 100ng/ml) had no effects on OC synthesis and formation of the mineralized nodules of HPDLFs. rhBMP2 (0. 25～2mg/ ml) had no remarkable effect on the proliferation of HPDLFs. The ALP activity, OC synthesis and forma-tion of the mineralized nodules of HPDLFs were significantly stimulated by 0. 5～ 2mg /ml rhBMP2. Conclusion The effects of TGF-β and rhBMP2 on HPDLFs are dose-dependent. TGF-P can stimulate HPDLFs to express the early marker of osteoblastic phenotype, and it lacks the ability to promote maturation of the osteogenic phenotype. rhBMP2 can not only stimulate the expression but also promote the maturation of osteoblas-tic phenotype of HPDLFs.
基金supported by grants from the Natural Science Foundation of China(No.30973671)the Natural Science Foundation of Guangdong Province of China(No.9151064001000031)
文摘The amino acid at the 119th position of human basic fibroblast growth factor(hbFGF),lysine(K119),is a critical component for its mitogenic activity.However,little is known about the effects of the characteristics of this residue including charge on the mitogenic activity of hbFGF.Herein,this basic residue was replaced with neutral glutamine residue and acidic glutamic acid residue to construct mutants hbFGF^(K119Q) and hbFGF^(K119E),respectively.The mutants were produced by BL21(DE3)/pET3c expression system...
基金This study was supported by the National Natural Science Foundation of China,No.59975074.
文摘Objective: To investigate the effect of recombinant human basic fibroblast growth factor ( rhbFGF) on angiogenesis during mandible fracture healing in rabbit.Methods: Fifty adult white rabbits were used for animal model and randomly divided into a control group (25 rabbits) and an experimental group (25 rabbits). The membranous complex of rhbFGF and bovine type I collagen was prepared and implanted into the rabbit mandible fracture site under periosteum. The animals were sacrificed on 7, 14, 28, 56 and 84 days respectively after operation and the whole mandibles were harvested. The expression of factor Vm related antigen (F8-RA) in callus was examined with immimohistochemical staining.Results: The amounts of microvascular formation in calluses in the rhbFGF-treating group on days 7, 14, 28 and 56 were more than those of the control group (P < 0.01).Conclusions: The results indicated that rhbFGF could stimulate microvascular formation during mandible fracture healing in rabbits.
文摘目的研究重组人酸性成纤维细胞生长因子(recombinant human acidic fibroblast growth factor,rh-aFGF)卡波姆940凝胶对糖尿病大鼠皮肤创伤修复作用。方法使用STZ诱导产生SD大鼠糖尿病模型,建立全层皮肤切除和烫伤两种皮肤创伤模型,设置对照组、赋形剂组、90 AU rh-aFGF凝胶组和270 AU rh-aFGF凝胶组4个实验组。用创伤面积和愈合速率评价各组疗效;HE染色观察创面中成纤维细胞、肌成纤维细胞、胶原纤维和毛细血管生长情况;半定量评分评价rh-aFGF诱导的上述指标生长情况。结果 rh-aFGF卡波姆940凝胶明显减少糖尿病SD大鼠全层皮肤切除和烫伤模型的皮肤损伤面积(P<0.05),促进其创伤愈合速率(P<0.05)。HE染色结果表明,rh-aFGF卡波姆凝胶明显促进成纤维细胞和胶原纤维增殖评分(P<0.05)。结论 rh-aFGF卡波姆凝胶可能在一定程度上保护创面微环境和保护rhaFGF发挥生物学活性,促进成纤维细胞增殖和胶原纤维沉积,从而促进糖尿病SD大鼠皮肤创伤愈合过程,有望成为一种治疗糖尿病溃疡的新制剂。
基金supported partially by the National Grant for Outstanding Young Researchers (No．39525024) the Major State Basic Development Program (No．G1999054204)．
文摘OBJECTIVE: To evaluate the safety and efficacy of topical application of recombinant bovine basic fibroblast growth factor (rbFGF) on the healing of chronic cutaneous wounds. METHODS: Twenty-eight patients with thirty-three chronic cutaneous wounds resulting from trauma, diabetes mellitus, pressure sore and radiation injuries were enrolled in this prospective, open-label crossover trial. Prior to treatment with rbFGF, all wounds failed to heal with conventional therapies within 4 weeks. All wounds were locally treated with rbFGF at a dose of 150 AU/cm(2). Healing time and the quality of wounds were used to evaluate the efficacy of the treatment. RESULTS: Healing of all chronic wounds was expedited. During the study, eighteen wounds completely healed within 2 weeks, four healed within 3 weeks, and another eight completely healed within 4 weeks. Only three wounds failed to heal within 4 weeks, but healed at 30, 40 and 42 days after treatment with rbFGF. Thus, compared with conventional therapies, the effective rate of rbFGF treatment within 4 weeks was 90.9%. Histological assessment showed more abundant capillary sprouts or tubes and that fibroblasts were differentiated in wounds treated with rbFGF. No adverse side effects related to basic fibroblast growth factor were observed. CONCLUSIONS: Our results indicate that rbFGF could be used to accelerate healing in chronic wounds. It is our belief that this may be a more effective method of chronic wound management.
