Fat is an indispensable nutrient and basic metabolite for sustaining life,and milk is particularly rich in fatty acids,including a variety of saturated and unsaturated fatty acids.MicroRNA(miRNA)and mRNA play an impor...Fat is an indispensable nutrient and basic metabolite for sustaining life,and milk is particularly rich in fatty acids,including a variety of saturated and unsaturated fatty acids.MicroRNA(miRNA)and mRNA play an important role in the regulation of milk fat metabolism in mammary gland tissue.It has been shown that lipid metabolism has a complex transcriptional regulation,but the mechanism by which milk fat synthesis is regulated through miRNA–mRNA interactions is poorly understood.In this study,we performed transcriptome sequencing with bovine mammary gland tissue in the late lactation(270 and 315 days after parturition)to identify the key gene that regulating milk fat metabolism.A total of 1207 differentially coexpressed genes were selected,828 upregulated genes and 379 downregulated genes were identified.The transforming growth factor alpha(TGFA)gene was selected as the target gene,and luciferase reporter assay,Western blotting and q RT-PCR were used for further study.The results demonstrated that miR-140 was an upstream regulator of TGFA,and miR-140 could inhibit(P<0.01)unsaturated fatty acid and triglyceride(TAGs)production in bovine mammary epithelial cells(BMECs).In contrast,TGFA promoted(P<0.01)unsaturated fatty acid and TAG production.Rescue experiments further indicated the mi R-140/TGFA regulatory mechanism.Taken together,these results suggest that the mi R-140/TGFA pathway can inhibit(P<0.01)milk fat metabolism and improve milk quality by genetic means.展开更多
Objective： Nonsyndromic cleft lip with or without cleft palate（NSCL/P） is a common birth defect with unclear etiology. Both genetic and environmental factors may contribute to NSCL/P. Many genes have been identifie...Objective： Nonsyndromic cleft lip with or without cleft palate（NSCL/P） is a common birth defect with unclear etiology. Both genetic and environmental factors may contribute to NSCL/P. Many genes have been identified as candidate genes associated with this disease. Interferon regulatory factor 6（IRF6） gene and transforming growth factor-a（TGFA） gene seem to be crucial in the predisposition of NSCL/ P. Here we evaluated some single nucleotide polymorphisms（SNPs） loci of TGFA and IRF6 genes in Chinese nuclear families consisting of fathers, mothers and affected offspring with NSCL/P. Methods：Fifty patients of NSCL/P were confirmed by the plastic surgeons. They and their parents were included in the study, all with the informed consents. SNPs loci of TGFA and IRF6 genes were analyzed by microarray technology. Some PCR products were randomly chosen and sequenced to check microarray results. The distribution of gene type and allele frequency between patient group and parents group were compared. Then a Haplotype Relative Risk（HRR） and Transmission Disequilibrium Test（TDT） were performed. Results：The sequences of randomly selected PCR products were all consistent with the microarray results. All loci were in Hardy-Weinberg equilibrium. There were no significant differences in the distribution of genotypes and alleles between patients and their parents. Using HRR and TDT analyses the V274I of IRF6 was associated with NSCL/P, while another SNP locus oflRF6 was not. Strong evidence of linkage disequilibrium was found between the 2 SNP loci of TGFA and disease with the HRR analysis, but not with the TDT analysis. Conclusion：Our study confirms the contribution of IRF6 in the etiology of NSCL/P in populations of Asian ancestry. The association of TGFA with NSCL/P requires further research.展开更多
目的:探索慢性胃病、胃癌中 TGFα和 cyclin E 表达与脾证分型的关系。方法:在慢性胃病和胃癌患者中,选取中医脾气(阳)虚、脾阴虚、脾胃湿热、寒湿困脾证患者共143例,进行胃粘膜组织的 TGFα和 cyclin E 免疫组化染色,对各证型的 TGFα...目的:探索慢性胃病、胃癌中 TGFα和 cyclin E 表达与脾证分型的关系。方法:在慢性胃病和胃癌患者中,选取中医脾气(阳)虚、脾阴虚、脾胃湿热、寒湿困脾证患者共143例,进行胃粘膜组织的 TGFα和 cyclin E 免疫组化染色,对各证型的 TGFα和 cyclin E 表达进行比较,并分析它们表达的相关性。结果:TGFα和 cyclin E 在上述四种脾证分型中的表达有显著性差异,TGFα表达的阳性率分别为15.8%、33.3%、41.2%和19.0%,cyclin E 则分别为7.9%、27.3% 31.4% 5和14.3%。TGFα和 cyclin E 表达存在显著的相关关系。结论:在慢性胃病、胃癌中,TGFα和 cyclin E 表达在不同中医证型中有明显差异,在脾胃湿热和脾阴虚证型中较高,在寒湿困脾和脾气(阳)虚证型中较低。TGFα和cyclin E 表达存在相关关系。展开更多
基金supported by the National Natural Science Foundation of China (31802035, 31872324 and 31601915)
文摘Fat is an indispensable nutrient and basic metabolite for sustaining life,and milk is particularly rich in fatty acids,including a variety of saturated and unsaturated fatty acids.MicroRNA(miRNA)and mRNA play an important role in the regulation of milk fat metabolism in mammary gland tissue.It has been shown that lipid metabolism has a complex transcriptional regulation,but the mechanism by which milk fat synthesis is regulated through miRNA–mRNA interactions is poorly understood.In this study,we performed transcriptome sequencing with bovine mammary gland tissue in the late lactation(270 and 315 days after parturition)to identify the key gene that regulating milk fat metabolism.A total of 1207 differentially coexpressed genes were selected,828 upregulated genes and 379 downregulated genes were identified.The transforming growth factor alpha(TGFA)gene was selected as the target gene,and luciferase reporter assay,Western blotting and q RT-PCR were used for further study.The results demonstrated that miR-140 was an upstream regulator of TGFA,and miR-140 could inhibit(P<0.01)unsaturated fatty acid and triglyceride(TAGs)production in bovine mammary epithelial cells(BMECs).In contrast,TGFA promoted(P<0.01)unsaturated fatty acid and TAG production.Rescue experiments further indicated the mi R-140/TGFA regulatory mechanism.Taken together,these results suggest that the mi R-140/TGFA pathway can inhibit(P<0.01)milk fat metabolism and improve milk quality by genetic means.
基金supported by the Medical Technology Development Foundation of Jiangsu Provincial Health Bureau of China (H200513)Changjiang Scholars and Innovative Research Team in University (IRT0631) and National 973 Program(2006CB944005)
文摘Objective： Nonsyndromic cleft lip with or without cleft palate（NSCL/P） is a common birth defect with unclear etiology. Both genetic and environmental factors may contribute to NSCL/P. Many genes have been identified as candidate genes associated with this disease. Interferon regulatory factor 6（IRF6） gene and transforming growth factor-a（TGFA） gene seem to be crucial in the predisposition of NSCL/ P. Here we evaluated some single nucleotide polymorphisms（SNPs） loci of TGFA and IRF6 genes in Chinese nuclear families consisting of fathers, mothers and affected offspring with NSCL/P. Methods：Fifty patients of NSCL/P were confirmed by the plastic surgeons. They and their parents were included in the study, all with the informed consents. SNPs loci of TGFA and IRF6 genes were analyzed by microarray technology. Some PCR products were randomly chosen and sequenced to check microarray results. The distribution of gene type and allele frequency between patient group and parents group were compared. Then a Haplotype Relative Risk（HRR） and Transmission Disequilibrium Test（TDT） were performed. Results：The sequences of randomly selected PCR products were all consistent with the microarray results. All loci were in Hardy-Weinberg equilibrium. There were no significant differences in the distribution of genotypes and alleles between patients and their parents. Using HRR and TDT analyses the V274I of IRF6 was associated with NSCL/P, while another SNP locus oflRF6 was not. Strong evidence of linkage disequilibrium was found between the 2 SNP loci of TGFA and disease with the HRR analysis, but not with the TDT analysis. Conclusion：Our study confirms the contribution of IRF6 in the etiology of NSCL/P in populations of Asian ancestry. The association of TGFA with NSCL/P requires further research.
文摘目的:探索慢性胃病、胃癌中 TGFα和 cyclin E 表达与脾证分型的关系。方法:在慢性胃病和胃癌患者中,选取中医脾气(阳)虚、脾阴虚、脾胃湿热、寒湿困脾证患者共143例,进行胃粘膜组织的 TGFα和 cyclin E 免疫组化染色,对各证型的 TGFα和 cyclin E 表达进行比较,并分析它们表达的相关性。结果:TGFα和 cyclin E 在上述四种脾证分型中的表达有显著性差异,TGFα表达的阳性率分别为15.8%、33.3%、41.2%和19.0%,cyclin E 则分别为7.9%、27.3% 31.4% 5和14.3%。TGFα和 cyclin E 表达存在显著的相关关系。结论:在慢性胃病、胃癌中,TGFα和 cyclin E 表达在不同中医证型中有明显差异,在脾胃湿热和脾阴虚证型中较高,在寒湿困脾和脾气(阳)虚证型中较低。TGFα和cyclin E 表达存在相关关系。
