AIM:To investigate the role of platelet-derived growth factor receptor-like gene(PDGFRL)in the anti-cancer therapy for colorectal cancers(CRC).METHODS:PDGFRL mRNA and protein levels were measured by reverse transcript...AIM:To investigate the role of platelet-derived growth factor receptor-like gene(PDGFRL)in the anti-cancer therapy for colorectal cancers(CRC).METHODS:PDGFRL mRNA and protein levels were measured by reverse transcription-polymerase chain reaction(RT-PCR)and immunohistochemistry in CRC and colorectal normal tissues.PDGFRL prokaryotic expression vector was carried out in Escherichia coli(E.coli),and purified by immobilized metal affinity chromatography.The effect of PDGFRL protein on CRC HCT-116 cells was detected by 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide(MTT),clone counting,cell cycle,and wound healing assay.RESULTS:Both RT-PCR and immunohistochemistry showed that the expression of PDGFRL in colorectal normal tissues was higher than in cancer tissues.Recombinant pET22b-PDGFRL prokaryotic expression vector was successfully expressed in E.coli,and the target protein was expressed in the form of inclusion bodies.After purification and refolding,recombinant human PDGFRL(rhPDGFRL)could efficiently inhibit the proliferation and invasion of CRC HCT-116 cells detected by MTT,clone counting and wound healing assay.Moreover,rhPDGFRL arrested HCT-116 cell cycling at the G0/G1 phase.CONCLUSION:PDGFRL is a potential gene for application in the anti-cancer therapy for CRC.展开更多
Surgery or interventional therapy has some risks in the treatment of cerebral aneurysm. We established an internal carotid artery aneurysm model by dripping elastase in the crotch of the right internal and external ca...Surgery or interventional therapy has some risks in the treatment of cerebral aneurysm. We established an internal carotid artery aneurysm model by dripping elastase in the crotch of the right internal and external carotid arteries of New Zealand rabbits. Following model induction, lentivirus carrying basic fibroblast growth factor was injected through the ear vein. We found that the longer the action time of the lentivirus, the smaller the aneurysm volume. Moreover, platelet-derived growth factor expression in the aneurysm increased, but smooth muscle 22 alpha and hypertension-related gene 1 mRNA expression decreased. At 1,2, 3, and 4 weeks following model establishment, following 1 week of injection of lentivirus carrying basic fibroblast growth factor, the later the intervention time, the more severe the blood vessel damage, and the bigger the aneurysm volume, the lower the smooth muscle 22 aJpha and hypertension-related gene ~ mRNA expression. Simultaneously, platelet-derived growth factor expression decreased. These data suggest that recombinant lentivirus carrying basic fibroblast growth factor can repair damaged cells in the aneurysmal wall and inhibit aneurysm dynamic growth, and that the effect is dependent on therapeutic duration.展开更多
Using normal brain cell geneomic DNA as a template,transforming growth factor(TGFa)-IV exon gene was amplified by polymerase chain reaction(PCR). The sequence of amplified fragment was analysed with a DNA sequencing k...Using normal brain cell geneomic DNA as a template,transforming growth factor(TGFa)-IV exon gene was amplified by polymerase chain reaction(PCR). The sequence of amplified fragment was analysed with a DNA sequencing kit.The results showed that the cloned fragment is proved to be the TGFa-IV exon gene.展开更多
Congenital cataract is a crystallin severe blinding disease and genetic factors in disease development are important. Crystallin growth is under a combination of genes and their products in time and space to complete ...Congenital cataract is a crystallin severe blinding disease and genetic factors in disease development are important. Crystallin growth is under a combination of genes and their products in time and space to complete the coordination role of the guidance. Congenital cataract-related genes, included crystallin protein gene (CRYAA, CRYAB, CRYBA1/A3, CRYBA4, CRYBB1, CRYBB2, CRYBB3, CRYGC, CRYGD, CRYGS), gap junction channel protein gene (GJA1, GJA3, GJA8), membrane protein gene (GJA3, GJA8, MIP, LIM2), cytoskeletal protein gene (BF-SP2), transcription factor genes (HSF4, MAF, PITX3, PAX6), ferritin light chain gene (FTL), fibroblast growth factor (FGF) and so on. Currently, there are about 39 genetic loci isolated to which primary cataracts have been mapped, although the number is constantly increasing and depends to some extent on definition. We summarized the recent advances on epidemiology and genetic locations of congenital cataract in this review.展开更多
AIM: To demonstrate that human platelet-derived growth factor-B (PDGF-B) cDNA could be Expressed in primary cultured cat corneal endothelia cells by using gene transfer techniques; to explore a useful tool for the fur...AIM: To demonstrate that human platelet-derived growth factor-B (PDGF-B) cDNA could be Expressed in primary cultured cat corneal endothelia cells by using gene transfer techniques; to explore a useful tool for the further studies of the molecular mechanisms of corneal endothelium failure and provide a potential effective genetic therapy for the blind patients. ' METHODS: Human PDGF-B cDNA was isolated from human placent by RT-PCR and inserted into pcDNA(4) vector to construct recombinant eukaryotic expression plasmid pcDNA(4)-PDGF-B. The full length was confirmed by the DNA sequencing analysis. By tearing endothelium technique we obtained pure single layer of cat corneal endothelial cells. The pcDNA(4)-PDGF-B eukaryotic Expression vector was transferred into cat corneal endothelial cells by Effectene (TM) lipofectine. The transfection efficiency of Effectene (TM) lipofectine in pcDNA(4)-B was detected with pcDNA(4)-GFP. 5 days later, RT-PCR was used to check the PDGF-B expression. Cell viability was tested by modified tertrozalium salt (MU) method. Cell morphology was observed under inverted phase contrast microscope. RESULTS: The human PDGF-B cDNA was isolated successfully from healthy parturien placent tissue and the sequence was confirmed by computer automatic sequence and PCR analysis. Pure single layer cat corneal endothelial cells were successfully cultured by tearing endothelium technique. Effectene (TM) lipofectine transfection technique could be effectively used to transfer pcDNA(4)-PDGF-B into cat corneal endothelial cells in vitro, the transfection efficiency was 30%. RT-PCR result showed that human PDGF-B gene was highly expressed in transfected cat corneal endothelial cells. The expressed PDGF-BB protein promoted the viability of cat corneal endothelial cells. CONCLUSION: Human platelet-derived growth factor-B (PDGF-B) cDNA could be highly Expressed in cultured cat corneal endothelial cells by gene transfection techniques. Expressed PDGF-BB protein significantly promoted the viability of cat corneal endothelial cells, thus provided a potential effective method for corneal endothelium blindness genetic therapy.展开更多
NGF is one of the few endogenous neurotrophic factors which have been clarified in structure and gene sequence. The β subunit of NGF (β-NGF) has been proved to be effective in promoting normal development and differ...NGF is one of the few endogenous neurotrophic factors which have been clarified in structure and gene sequence. The β subunit of NGF (β-NGF) has been proved to be effective in promoting normal development and differentiation of certain neurons in both central and peripheral nervous systemst. It has also shown to play展开更多
目的:探讨靶向结缔组织生长因子(CTGF)的锤头核酶抑制TGF-β1作用下人肝星状细胞(HSC)Ⅰ型胶原(Col I)合成及其细胞周期进程的作用.方法:构建含有人CTGF锤头核酶cDNA序列的重组质粒pTriCTGF-Rz.将空质粒pTriEx2和重组质粒pTriCTGF-Rz分...目的:探讨靶向结缔组织生长因子(CTGF)的锤头核酶抑制TGF-β1作用下人肝星状细胞(HSC)Ⅰ型胶原(Col I)合成及其细胞周期进程的作用.方法:构建含有人CTGF锤头核酶cDNA序列的重组质粒pTriCTGF-Rz.将空质粒pTriEx2和重组质粒pTriCTGF-Rz分别转染人肝星状细胞系(LX-2)细胞.细胞分为4组:pTriEx2转染组,pTriEx2转染加TGF-β1组,pTriCTGF-Rz转染加TGF-β1组和pTriCTGF-Rz转染组.采用半定量RT-PCR测定LX-2细胞CTGF mRNA和Col I mRNA转录水平,采用ELISA和流式细胞仪分别用于LX-2细胞Col I分泌功能和LX-2细胞周期进程的检测.结果:TGF-β1可明显提高LX-2细胞CTGFmRNA和Col I mRNA的转录水平及分泌ColI蛋白功能(t=11.14,14.36,7.17,均P<0.01);p Tr i C T G F-R z转染L X-2细胞既能降低基础CTGF mRNA和Col I mRNA水平及Col I蛋白水平(t=2.86,3.06,2.97,均P<0.05),又能部分拮抗TGF-β1诱导LX-2细胞CTGF mRNA和Col I mRNA转录和Col I蛋白分泌的增加(t=2.99,3.09,3.02,均P<0.05).TGF-β1对LX-2细胞周期进程无影响.结论:CTGF是TGF-β1作用下人肝星状细胞合成Col I的下游介导者,TGF-β1对HSC周期进程无影响,靶向CTGF有可能成为肝纤维化基因治疗的新靶点.展开更多
基金Supported by The National Natural Science Foundation of China,No.30672352
文摘AIM:To investigate the role of platelet-derived growth factor receptor-like gene(PDGFRL)in the anti-cancer therapy for colorectal cancers(CRC).METHODS:PDGFRL mRNA and protein levels were measured by reverse transcription-polymerase chain reaction(RT-PCR)and immunohistochemistry in CRC and colorectal normal tissues.PDGFRL prokaryotic expression vector was carried out in Escherichia coli(E.coli),and purified by immobilized metal affinity chromatography.The effect of PDGFRL protein on CRC HCT-116 cells was detected by 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide(MTT),clone counting,cell cycle,and wound healing assay.RESULTS:Both RT-PCR and immunohistochemistry showed that the expression of PDGFRL in colorectal normal tissues was higher than in cancer tissues.Recombinant pET22b-PDGFRL prokaryotic expression vector was successfully expressed in E.coli,and the target protein was expressed in the form of inclusion bodies.After purification and refolding,recombinant human PDGFRL(rhPDGFRL)could efficiently inhibit the proliferation and invasion of CRC HCT-116 cells detected by MTT,clone counting and wound healing assay.Moreover,rhPDGFRL arrested HCT-116 cell cycling at the G0/G1 phase.CONCLUSION:PDGFRL is a potential gene for application in the anti-cancer therapy for CRC.
基金funded by the Key Medical SubjectProject of Jiangsu Province, No. XK2007227
文摘Surgery or interventional therapy has some risks in the treatment of cerebral aneurysm. We established an internal carotid artery aneurysm model by dripping elastase in the crotch of the right internal and external carotid arteries of New Zealand rabbits. Following model induction, lentivirus carrying basic fibroblast growth factor was injected through the ear vein. We found that the longer the action time of the lentivirus, the smaller the aneurysm volume. Moreover, platelet-derived growth factor expression in the aneurysm increased, but smooth muscle 22 alpha and hypertension-related gene 1 mRNA expression decreased. At 1,2, 3, and 4 weeks following model establishment, following 1 week of injection of lentivirus carrying basic fibroblast growth factor, the later the intervention time, the more severe the blood vessel damage, and the bigger the aneurysm volume, the lower the smooth muscle 22 aJpha and hypertension-related gene ~ mRNA expression. Simultaneously, platelet-derived growth factor expression decreased. These data suggest that recombinant lentivirus carrying basic fibroblast growth factor can repair damaged cells in the aneurysmal wall and inhibit aneurysm dynamic growth, and that the effect is dependent on therapeutic duration.
文摘Using normal brain cell geneomic DNA as a template,transforming growth factor(TGFa)-IV exon gene was amplified by polymerase chain reaction(PCR). The sequence of amplified fragment was analysed with a DNA sequencing kit.The results showed that the cloned fragment is proved to be the TGFa-IV exon gene.
文摘Congenital cataract is a crystallin severe blinding disease and genetic factors in disease development are important. Crystallin growth is under a combination of genes and their products in time and space to complete the coordination role of the guidance. Congenital cataract-related genes, included crystallin protein gene (CRYAA, CRYAB, CRYBA1/A3, CRYBA4, CRYBB1, CRYBB2, CRYBB3, CRYGC, CRYGD, CRYGS), gap junction channel protein gene (GJA1, GJA3, GJA8), membrane protein gene (GJA3, GJA8, MIP, LIM2), cytoskeletal protein gene (BF-SP2), transcription factor genes (HSF4, MAF, PITX3, PAX6), ferritin light chain gene (FTL), fibroblast growth factor (FGF) and so on. Currently, there are about 39 genetic loci isolated to which primary cataracts have been mapped, although the number is constantly increasing and depends to some extent on definition. We summarized the recent advances on epidemiology and genetic locations of congenital cataract in this review.
基金National Natural Science Foundation of China(No.30572011)Natural Science Foundation of Shandong Province,China(No.ZR2010HQ041)
文摘AIM: To demonstrate that human platelet-derived growth factor-B (PDGF-B) cDNA could be Expressed in primary cultured cat corneal endothelia cells by using gene transfer techniques; to explore a useful tool for the further studies of the molecular mechanisms of corneal endothelium failure and provide a potential effective genetic therapy for the blind patients. ' METHODS: Human PDGF-B cDNA was isolated from human placent by RT-PCR and inserted into pcDNA(4) vector to construct recombinant eukaryotic expression plasmid pcDNA(4)-PDGF-B. The full length was confirmed by the DNA sequencing analysis. By tearing endothelium technique we obtained pure single layer of cat corneal endothelial cells. The pcDNA(4)-PDGF-B eukaryotic Expression vector was transferred into cat corneal endothelial cells by Effectene (TM) lipofectine. The transfection efficiency of Effectene (TM) lipofectine in pcDNA(4)-B was detected with pcDNA(4)-GFP. 5 days later, RT-PCR was used to check the PDGF-B expression. Cell viability was tested by modified tertrozalium salt (MU) method. Cell morphology was observed under inverted phase contrast microscope. RESULTS: The human PDGF-B cDNA was isolated successfully from healthy parturien placent tissue and the sequence was confirmed by computer automatic sequence and PCR analysis. Pure single layer cat corneal endothelial cells were successfully cultured by tearing endothelium technique. Effectene (TM) lipofectine transfection technique could be effectively used to transfer pcDNA(4)-PDGF-B into cat corneal endothelial cells in vitro, the transfection efficiency was 30%. RT-PCR result showed that human PDGF-B gene was highly expressed in transfected cat corneal endothelial cells. The expressed PDGF-BB protein promoted the viability of cat corneal endothelial cells. CONCLUSION: Human platelet-derived growth factor-B (PDGF-B) cDNA could be highly Expressed in cultured cat corneal endothelial cells by gene transfection techniques. Expressed PDGF-BB protein significantly promoted the viability of cat corneal endothelial cells, thus provided a potential effective method for corneal endothelium blindness genetic therapy.
文摘NGF is one of the few endogenous neurotrophic factors which have been clarified in structure and gene sequence. The β subunit of NGF (β-NGF) has been proved to be effective in promoting normal development and differentiation of certain neurons in both central and peripheral nervous systemst. It has also shown to play
文摘目的:探讨靶向结缔组织生长因子(CTGF)的锤头核酶抑制TGF-β1作用下人肝星状细胞(HSC)Ⅰ型胶原(Col I)合成及其细胞周期进程的作用.方法:构建含有人CTGF锤头核酶cDNA序列的重组质粒pTriCTGF-Rz.将空质粒pTriEx2和重组质粒pTriCTGF-Rz分别转染人肝星状细胞系(LX-2)细胞.细胞分为4组:pTriEx2转染组,pTriEx2转染加TGF-β1组,pTriCTGF-Rz转染加TGF-β1组和pTriCTGF-Rz转染组.采用半定量RT-PCR测定LX-2细胞CTGF mRNA和Col I mRNA转录水平,采用ELISA和流式细胞仪分别用于LX-2细胞Col I分泌功能和LX-2细胞周期进程的检测.结果:TGF-β1可明显提高LX-2细胞CTGFmRNA和Col I mRNA的转录水平及分泌ColI蛋白功能(t=11.14,14.36,7.17,均P<0.01);p Tr i C T G F-R z转染L X-2细胞既能降低基础CTGF mRNA和Col I mRNA水平及Col I蛋白水平(t=2.86,3.06,2.97,均P<0.05),又能部分拮抗TGF-β1诱导LX-2细胞CTGF mRNA和Col I mRNA转录和Col I蛋白分泌的增加(t=2.99,3.09,3.02,均P<0.05).TGF-β1对LX-2细胞周期进程无影响.结论:CTGF是TGF-β1作用下人肝星状细胞合成Col I的下游介导者,TGF-β1对HSC周期进程无影响,靶向CTGF有可能成为肝纤维化基因治疗的新靶点.
