Objective To study the relationship between polymorphism of cystathionine beta synthase （CBS） gene and development of congenital heart disease （CHD）. Methods One hundred and twenty-seven CHD case-parent triads wer...Objective To study the relationship between polymorphism of cystathionine beta synthase （CBS） gene and development of congenital heart disease （CHD）. Methods One hundred and twenty-seven CHD case-parent triads were recruited from Liaoning Province as patient group, and 129 healthy subjects without family history of birth defect were simultaneously recruited as control group together with their biological parents. For all subjects the polymorphism of CBS gene G919A locus was examined by PCR-ARMS method, Results The frequencies of three genotypes （w/w, w/m, and m/m） in control group were 27.2%, 58,4%, and 14.4%, respectively, with no significant difference in gender. A significant difference in the allele frequency was found between CHD patients and controls, the wild allele frequency was 67,9% in patients and 55.7% in controls CHD parents＇ genotype distribution was significantly different from that in controls. Further comparison of each type of CHD showed that genotype frequencies in several CHD subtypes were significantly different from those in their corresponding controls. The results of TDT analysis showed that no allele transmission disequilibrium existed in CHD nuclear families. Conclusions CBS gene G919A mutation is associated with the development of CHD, and the mutated allele may decrease the risk of CHD.展开更多
Soybean （Glycine max （L.） Merr.） is a major crop that provides plant-origin protein and oil for humans and livestock. Al- though the soybean vegetative tissues and seeds provide a major source of high-quality prot...Soybean （Glycine max （L.） Merr.） is a major crop that provides plant-origin protein and oil for humans and livestock. Al- though the soybean vegetative tissues and seeds provide a major source of high-quality protein, they suffer from low con- centration of an essential sulfur-containing amino acid, methionine, which significantly limits their nutritional quality. The level of methionine is mainly controlled by the first unique enzyme of methionine synthesis, cystathione y-synthase （CGS）. Aiming to elevate methionine level in vegetative tissues and seeds, we constitutively over-expressed a feedback-insensitive Arabidopsis CGS （AtD-CGS） in soybean cultivars, Zigongdongdou （ZD） and Jilinxiaoli 1 （JX）. The levels of soluble methionine increased remarkably in leaves of transgenic soybeans compared to wild-type plants （6.6- and 7.3-fold in two transgenic ZD lines, and 3.7-fold in one transgenic JX line）. Furthermore, the total methionine contents were significantly increased in seeds of the transgenic ZD lines （1.5- to 4.8-fold increase） and the transgenic JX lines （1.3- to 2.3-fold increase） than in the wild type. The protein contents of the transgenic soybean seeds were significantly elevated compared to the wild type, suggesting that the scarcity of methionine in soybeans may limit protein accumulation in soybean seeds. The increased protein content did not alter the profile of major storage proteins in the seeds. Generally, this study provides a promising strategy to increase the levels of methionine and protein in soybean through the breeding programs.展开更多
目的探讨2型糖尿病患者的同型半胱氨酸水平(homocysteine,Hcy)及Hcy代谢相关酶胱硫醚β-合成酶(cysta-thionineβ-synthase,CBS)基因的844 ins68的多态性的特点。方法选择72例新发2型糖尿病患者(DM)及83例健康对照者,检测了所有研究对象...目的探讨2型糖尿病患者的同型半胱氨酸水平(homocysteine,Hcy)及Hcy代谢相关酶胱硫醚β-合成酶(cysta-thionineβ-synthase,CBS)基因的844 ins68的多态性的特点。方法选择72例新发2型糖尿病患者(DM)及83例健康对照者,检测了所有研究对象的Hcy、叶酸、维生素B12浓度。应用PCR分析CBS 844ins68基因多态性。结果 DM组Hcy水平明显低于对照组,差异具有统计学意义(10.9μmol/L vs 12.7μmol/L,P<0.05)。DM组叶酸水平明显高于对照组(8.3ng/ml vs 5.5ng/ml,P<0.05)。DM组维生素B12水平与对照组差异无统计学意义(396pg/ml vs 431pg/ml,P>0.05)。糖尿病组与对照组CBS844ins68的基因型及等位基因频率的差异均无统计学意义,P>0.05。结论初发2型糖尿病Hcy水平可能减低,CBS844ins68基因多态性可能与糖尿病无关。展开更多
基金This work was supported by Major State Basic Research Development Program of the People's Republic of China (No. 2001CB510305).
文摘Objective To study the relationship between polymorphism of cystathionine beta synthase （CBS） gene and development of congenital heart disease （CHD）. Methods One hundred and twenty-seven CHD case-parent triads were recruited from Liaoning Province as patient group, and 129 healthy subjects without family history of birth defect were simultaneously recruited as control group together with their biological parents. For all subjects the polymorphism of CBS gene G919A locus was examined by PCR-ARMS method, Results The frequencies of three genotypes （w/w, w/m, and m/m） in control group were 27.2%, 58,4%, and 14.4%, respectively, with no significant difference in gender. A significant difference in the allele frequency was found between CHD patients and controls, the wild allele frequency was 67,9% in patients and 55.7% in controls CHD parents＇ genotype distribution was significantly different from that in controls. Further comparison of each type of CHD showed that genotype frequencies in several CHD subtypes were significantly different from those in their corresponding controls. The results of TDT analysis showed that no allele transmission disequilibrium existed in CHD nuclear families. Conclusions CBS gene G919A mutation is associated with the development of CHD, and the mutated allele may decrease the risk of CHD.
基金supported by the Major Science and Technology Projects of China (2014ZX08004-003,2014ZX08010-004)the Natural Science Foundation of China (31471571)+2 种基金the earmarked fund for China Agriculture Research System (CARS-04)the Agricultural Science and Technology Innovation Project of CAASIsrael Science Foundation (ISF grant 231-09)
文摘Soybean （Glycine max （L.） Merr.） is a major crop that provides plant-origin protein and oil for humans and livestock. Al- though the soybean vegetative tissues and seeds provide a major source of high-quality protein, they suffer from low con- centration of an essential sulfur-containing amino acid, methionine, which significantly limits their nutritional quality. The level of methionine is mainly controlled by the first unique enzyme of methionine synthesis, cystathione y-synthase （CGS）. Aiming to elevate methionine level in vegetative tissues and seeds, we constitutively over-expressed a feedback-insensitive Arabidopsis CGS （AtD-CGS） in soybean cultivars, Zigongdongdou （ZD） and Jilinxiaoli 1 （JX）. The levels of soluble methionine increased remarkably in leaves of transgenic soybeans compared to wild-type plants （6.6- and 7.3-fold in two transgenic ZD lines, and 3.7-fold in one transgenic JX line）. Furthermore, the total methionine contents were significantly increased in seeds of the transgenic ZD lines （1.5- to 4.8-fold increase） and the transgenic JX lines （1.3- to 2.3-fold increase） than in the wild type. The protein contents of the transgenic soybean seeds were significantly elevated compared to the wild type, suggesting that the scarcity of methionine in soybeans may limit protein accumulation in soybean seeds. The increased protein content did not alter the profile of major storage proteins in the seeds. Generally, this study provides a promising strategy to increase the levels of methionine and protein in soybean through the breeding programs.
文摘目的探讨2型糖尿病患者的同型半胱氨酸水平(homocysteine,Hcy)及Hcy代谢相关酶胱硫醚β-合成酶(cysta-thionineβ-synthase,CBS)基因的844 ins68的多态性的特点。方法选择72例新发2型糖尿病患者(DM)及83例健康对照者,检测了所有研究对象的Hcy、叶酸、维生素B12浓度。应用PCR分析CBS 844ins68基因多态性。结果 DM组Hcy水平明显低于对照组,差异具有统计学意义(10.9μmol/L vs 12.7μmol/L,P<0.05)。DM组叶酸水平明显高于对照组(8.3ng/ml vs 5.5ng/ml,P<0.05)。DM组维生素B12水平与对照组差异无统计学意义(396pg/ml vs 431pg/ml,P>0.05)。糖尿病组与对照组CBS844ins68的基因型及等位基因频率的差异均无统计学意义,P>0.05。结论初发2型糖尿病Hcy水平可能减低,CBS844ins68基因多态性可能与糖尿病无关。
