AIM To clarify the relationship between the Insulin like growth factor Ⅱ (IGF Ⅱ), IGF Ⅱ receptor and chronic liver diseases and to provide evidences for basic and clinical researches for exploring the potential...AIM To clarify the relationship between the Insulin like growth factor Ⅱ (IGF Ⅱ), IGF Ⅱ receptor and chronic liver diseases and to provide evidences for basic and clinical researches for exploring the potential mechanisms of human hepatocellular carcinoma (HCC). METHODS The poly (A)+ mRNA translation of IGF Ⅱ and IGF Ⅱ receptor in dysplasia liver cell (DLC n =10), liver cirrhosis (LC n =9) and chronic active hepatitis (CAH n =9) were analyzed with RNA gel electrophoresis, Northern blot and hybridization using human IGF Ⅱ and IGF Ⅱ receptor DNA probes labelled with 32 P through Nick translation and autoradiography. RESULTS The overexpression of IGF Ⅱ in DLC (10/10, 100%) was apparently higher than that in CAH (3/9, 33%) and LC (3/9, 33%), ( P <0 01). The overexpression of IGF Ⅱ receptor in DLC (7/10, 70%) was significantly higher than that in CAH (2/9, 22%) and LC (3/9, 33%), respectively. The data of HBV infection from different chronic liver diseases were analyzed. CONCLUSION The overexpression of IGF Ⅱ and IGF Ⅱ receptor in DLC was related to the preceeding of malignant phenotype of hepatocyte, which provided a diagnostic value for early detection of hepatocellular carcinoma (HCC). Persistent HBV infection is strongly associated with abnormal activation of IGF Ⅱ and IGF Ⅱ receptor, which might indicate a stimulating mechanism of autocrine or paracrine growth involved in live cell carcinogenesis.展开更多
INTRODUCTIONInsulin-like growth factor Ⅱ(IGF-Ⅱ) is a mitogenic peptide of 74 kD and is mostly synthesized in fetal liver tissue .IGF-Ⅱ is believed to play an important role in fetal growth and development and is in...INTRODUCTIONInsulin-like growth factor Ⅱ(IGF-Ⅱ) is a mitogenic peptide of 74 kD and is mostly synthesized in fetal liver tissue .IGF-Ⅱ is believed to play an important role in fetal growth and development and is involved in cellular proliferation and differentiation[1-5]. Recently ,several researchers have reported increased expression of the IGF-Ⅱgene in human hepatocellular carcinoma (HCC) and adjacent non-cancerous liver tissues [6-10].展开更多
OBJECTIVE To study the relationship among microsatellite instability （MSI）, frameshift mutations （FM） of the transforming growth factor β receptor Ⅱ （TGF β R Ⅱ）, methylation state of the hMLH1 promoter and h...OBJECTIVE To study the relationship among microsatellite instability （MSI）, frameshift mutations （FM） of the transforming growth factor β receptor Ⅱ （TGF β R Ⅱ）, methylation state of the hMLH1 promoter and hMLH1 protein expression level in gastric cancers, and to explore their relationship to gastric carcinogenesis. METHODS DNA was isolated from 101 gastric specimens and 5 microsatellite loci were detected. PCR, electrophoresis on denatured polyacrylamide gels and silver staining were performed to detect the MSI. The FMs of TGFβR Ⅱ were also screened with the same method. HMLH1 methylation was analyzed by methylation specific PCR （MSP） and sequencing. HMLH1 protein expression was detected using immunohistochemistry. RESULTS The incidence of MSIs was 53.7% and 0% in the cancers and normal tissues, respectively, with the frequency of MSIs being significantly higher in the gastric cancers compared to the normal gastric tissues （P〈0.05）. The frequency of hMLH1 methylation was 41.5%（17/41） in the gastric cancers and 0%（0/60） in the normal group. Decreased hMLH1 expression was observed in 94.1%（16/17） of cases exhibiting methylation. FMs of TGFβR Ⅱ were identified in 5 （62.5%） of the 8 samples with MSIH. In contrast, FMs were not found in MSI-L or microsatellite stable （MSS） cases. CONCLUSION MSIs and FMs of TGFβR Ⅱ may play an important role in gastric carcinogenesis. HMLH1 methylation is an important modification of the DNA which results in inactivation of hMLH1 and mismatch repair defects which lead to MSls and FMs of TGFβR Ⅱ.展开更多
Objective: To study the transforming growth factor β receptor Ⅱ (TGFβ-R Ⅱ) expression in experimental cryptorchidism and apoptosis in spermatogenic cells in rats. Methods: The apoptosis of spermatogenic cells was ...Objective: To study the transforming growth factor β receptor Ⅱ (TGFβ-R Ⅱ) expression in experimental cryptorchidism and apoptosis in spermatogenic cells in rats. Methods: The apoptosis of spermatogenic cells was detected by means of the terminal deoxynucleotldyl transferase mediated dUTP nick end lableling method (TUNEL) and the TGFβ-R Ⅱ expression was observed with the immunohistochemistry SABC methods. Results: There was a significant increase in the TGFβ-R Ⅱ expression in unilateral undescended testes (UUTs) compared with that in contralateral descended testes (CDTs, P<0.01). However, there was a significant and time-dependent increase in the mean apoptotic index in UUTs than in CDTs. Conclusion: TGFβ-R Ⅱ may play an important role in spermatogenic cell apoptosis.展开更多
The expression of the products of IGF-Ⅱ,IGF-Ⅱ receptors(IGF-Ⅱ-R)and CSF-Ⅰ re-ceptors(CSF-Ⅰ-R)was observed in 17 cases of human primary hepatocellular carcinoma(PHC)and the juxtacancerous liver tissue with immunoh...The expression of the products of IGF-Ⅱ,IGF-Ⅱ receptors(IGF-Ⅱ-R)and CSF-Ⅰ re-ceptors(CSF-Ⅰ-R)was observed in 17 cases of human primary hepatocellular carcinoma(PHC)and the juxtacancerous liver tissue with immunohistochemistry(ABC),Western blot and North-ern blot technique,It was found that the expression of IGF-Ⅱ,IGF-Ⅱ-R and CSF-Ⅰ-R was signif-icantly higher in PHC than in normal liver tissue and the expression of IGF-Ⅱ and IGF-Ⅱ-R wasremarkably higher in the juxtacancerous liver tissue from PHC patients than in PHC proper.Itwas noteworthy that the expression of IGF-Ⅱ in both the cancer proper and the juxtacancerousliver tissue was characterized by its fetal type.Besides,the expression of CSF-Ⅰ-R was signifi-cantly higher in PHC than in the juxtacancerous liver tissue.It is believed that the abnormal ex-pression of IGF-Ⅱ,IGF-Ⅱ-R and CSF-I-R in PHC and the juxtacaneerous liver tissue might berelated to the autocrine mechanism of human PHC.展开更多
Objective To study the effect of baicalin on the expression of receptor activator of nuclear factor-κB ligand(RANKL)and osteoprotegerin(OPG)in cultured human periodontal ligament(HPDL)cells.Methods Small interfering ...Objective To study the effect of baicalin on the expression of receptor activator of nuclear factor-κB ligand(RANKL)and osteoprotegerin(OPG)in cultured human periodontal ligament(HPDL)cells.Methods Small interfering RNA(siRNA)eukaryotic expression vector targeted transforming growth factor βⅡ receptor(TGF-β RⅡ)was constructed and transfected into T cells.HPDL cells with T cells transfected with siRNA or not were placed in the culture medium that had been added with lipopolysaccharide(LPS)and baicalin.The obtained solution was divided into six groups according to the components(group Ⅰ:HPDL cells+LPS+T cells transfected with siRNA1+baicalin;group Ⅱ:HPDL cells+LPS+T cells transfected with siRNA1;group Ⅲ:HPDL cells+LPS+T cells+baicalin;group Ⅳ:HPDL cells+LPS+T cells;group Ⅴ:HPDL cells+baicalin;group Ⅵ:HPDL cells)and was cultured for 48 hours.RT-PCR was used to observe the effect of baicalin on the expression of OPG-RANKL in HPDL cells.Results The ratio of RANKL/OPG in group Ⅰ was lower than that in group Ⅱ(P<0.01)and higher than that in group Ⅲ(P<0.01);The ratio of RANKL/OPG in group Ⅲ was lower than that in group Ⅳ(P<0.01);the ratio of RANKL/OPG in group Ⅳ was higher than that in group Ⅵ(P<0.01);the ratio of RANKL/OPG in group Ⅴ was lower than that in group Ⅵ(P<0.05).Conclusion ① Baicalin could decrease the ratio of RANKL/OPG in HPDL cells.② The TGF-β signaling transduction plays an important role in the effect of baicalin on the RANKL/OPG ratio in HPDL cells.③ Baicalin acts not only through TGF-β to regulate RANKL/OPG in HPDL cells,but also through other pathways.展开更多
文摘AIM To clarify the relationship between the Insulin like growth factor Ⅱ (IGF Ⅱ), IGF Ⅱ receptor and chronic liver diseases and to provide evidences for basic and clinical researches for exploring the potential mechanisms of human hepatocellular carcinoma (HCC). METHODS The poly (A)+ mRNA translation of IGF Ⅱ and IGF Ⅱ receptor in dysplasia liver cell (DLC n =10), liver cirrhosis (LC n =9) and chronic active hepatitis (CAH n =9) were analyzed with RNA gel electrophoresis, Northern blot and hybridization using human IGF Ⅱ and IGF Ⅱ receptor DNA probes labelled with 32 P through Nick translation and autoradiography. RESULTS The overexpression of IGF Ⅱ in DLC (10/10, 100%) was apparently higher than that in CAH (3/9, 33%) and LC (3/9, 33%), ( P <0 01). The overexpression of IGF Ⅱ receptor in DLC (7/10, 70%) was significantly higher than that in CAH (2/9, 22%) and LC (3/9, 33%), respectively. The data of HBV infection from different chronic liver diseases were analyzed. CONCLUSION The overexpression of IGF Ⅱ and IGF Ⅱ receptor in DLC was related to the preceeding of malignant phenotype of hepatocyte, which provided a diagnostic value for early detection of hepatocellular carcinoma (HCC). Persistent HBV infection is strongly associated with abnormal activation of IGF Ⅱ and IGF Ⅱ receptor, which might indicate a stimulating mechanism of autocrine or paracrine growth involved in live cell carcinogenesis.
基金Project supported by the National Nature Science Foundation of China,No.39470774
文摘INTRODUCTIONInsulin-like growth factor Ⅱ(IGF-Ⅱ) is a mitogenic peptide of 74 kD and is mostly synthesized in fetal liver tissue .IGF-Ⅱ is believed to play an important role in fetal growth and development and is involved in cellular proliferation and differentiation[1-5]. Recently ,several researchers have reported increased expression of the IGF-Ⅱgene in human hepatocellular carcinoma (HCC) and adjacent non-cancerous liver tissues [6-10].
文摘OBJECTIVE To study the relationship among microsatellite instability （MSI）, frameshift mutations （FM） of the transforming growth factor β receptor Ⅱ （TGF β R Ⅱ）, methylation state of the hMLH1 promoter and hMLH1 protein expression level in gastric cancers, and to explore their relationship to gastric carcinogenesis. METHODS DNA was isolated from 101 gastric specimens and 5 microsatellite loci were detected. PCR, electrophoresis on denatured polyacrylamide gels and silver staining were performed to detect the MSI. The FMs of TGFβR Ⅱ were also screened with the same method. HMLH1 methylation was analyzed by methylation specific PCR （MSP） and sequencing. HMLH1 protein expression was detected using immunohistochemistry. RESULTS The incidence of MSIs was 53.7% and 0% in the cancers and normal tissues, respectively, with the frequency of MSIs being significantly higher in the gastric cancers compared to the normal gastric tissues （P〈0.05）. The frequency of hMLH1 methylation was 41.5%（17/41） in the gastric cancers and 0%（0/60） in the normal group. Decreased hMLH1 expression was observed in 94.1%（16/17） of cases exhibiting methylation. FMs of TGFβR Ⅱ were identified in 5 （62.5%） of the 8 samples with MSIH. In contrast, FMs were not found in MSI-L or microsatellite stable （MSS） cases. CONCLUSION MSIs and FMs of TGFβR Ⅱ may play an important role in gastric carcinogenesis. HMLH1 methylation is an important modification of the DNA which results in inactivation of hMLH1 and mismatch repair defects which lead to MSls and FMs of TGFβR Ⅱ.
文摘Objective: To study the transforming growth factor β receptor Ⅱ (TGFβ-R Ⅱ) expression in experimental cryptorchidism and apoptosis in spermatogenic cells in rats. Methods: The apoptosis of spermatogenic cells was detected by means of the terminal deoxynucleotldyl transferase mediated dUTP nick end lableling method (TUNEL) and the TGFβ-R Ⅱ expression was observed with the immunohistochemistry SABC methods. Results: There was a significant increase in the TGFβ-R Ⅱ expression in unilateral undescended testes (UUTs) compared with that in contralateral descended testes (CDTs, P<0.01). However, there was a significant and time-dependent increase in the mean apoptotic index in UUTs than in CDTs. Conclusion: TGFβ-R Ⅱ may play an important role in spermatogenic cell apoptosis.
基金This project was financially aided by the National"Seven-Five"Research Funds of China
文摘The expression of the products of IGF-Ⅱ,IGF-Ⅱ receptors(IGF-Ⅱ-R)and CSF-Ⅰ re-ceptors(CSF-Ⅰ-R)was observed in 17 cases of human primary hepatocellular carcinoma(PHC)and the juxtacancerous liver tissue with immunohistochemistry(ABC),Western blot and North-ern blot technique,It was found that the expression of IGF-Ⅱ,IGF-Ⅱ-R and CSF-Ⅰ-R was signif-icantly higher in PHC than in normal liver tissue and the expression of IGF-Ⅱ and IGF-Ⅱ-R wasremarkably higher in the juxtacancerous liver tissue from PHC patients than in PHC proper.Itwas noteworthy that the expression of IGF-Ⅱ in both the cancer proper and the juxtacancerousliver tissue was characterized by its fetal type.Besides,the expression of CSF-Ⅰ-R was signifi-cantly higher in PHC than in the juxtacancerous liver tissue.It is believed that the abnormal ex-pression of IGF-Ⅱ,IGF-Ⅱ-R and CSF-I-R in PHC and the juxtacaneerous liver tissue might berelated to the autocrine mechanism of human PHC.
基金supported by the Foundation of Stomatology Hospital,Xi'an Jiaotong University
文摘Objective To study the effect of baicalin on the expression of receptor activator of nuclear factor-κB ligand(RANKL)and osteoprotegerin(OPG)in cultured human periodontal ligament(HPDL)cells.Methods Small interfering RNA(siRNA)eukaryotic expression vector targeted transforming growth factor βⅡ receptor(TGF-β RⅡ)was constructed and transfected into T cells.HPDL cells with T cells transfected with siRNA or not were placed in the culture medium that had been added with lipopolysaccharide(LPS)and baicalin.The obtained solution was divided into six groups according to the components(group Ⅰ:HPDL cells+LPS+T cells transfected with siRNA1+baicalin;group Ⅱ:HPDL cells+LPS+T cells transfected with siRNA1;group Ⅲ:HPDL cells+LPS+T cells+baicalin;group Ⅳ:HPDL cells+LPS+T cells;group Ⅴ:HPDL cells+baicalin;group Ⅵ:HPDL cells)and was cultured for 48 hours.RT-PCR was used to observe the effect of baicalin on the expression of OPG-RANKL in HPDL cells.Results The ratio of RANKL/OPG in group Ⅰ was lower than that in group Ⅱ(P<0.01)and higher than that in group Ⅲ(P<0.01);The ratio of RANKL/OPG in group Ⅲ was lower than that in group Ⅳ(P<0.01);the ratio of RANKL/OPG in group Ⅳ was higher than that in group Ⅵ(P<0.01);the ratio of RANKL/OPG in group Ⅴ was lower than that in group Ⅵ(P<0.05).Conclusion ① Baicalin could decrease the ratio of RANKL/OPG in HPDL cells.② The TGF-β signaling transduction plays an important role in the effect of baicalin on the RANKL/OPG ratio in HPDL cells.③ Baicalin acts not only through TGF-β to regulate RANKL/OPG in HPDL cells,but also through other pathways.
