The relationship between different BMPRIB genotypes of Small Tail Han sheep and FSHR and LHR mRNA levels during the oestrum was studied using semiquantitative PCR. The results indicated that FSHR mRNA extracted from t...The relationship between different BMPRIB genotypes of Small Tail Han sheep and FSHR and LHR mRNA levels during the oestrum was studied using semiquantitative PCR. The results indicated that FSHR mRNA extracted from the right ovary of BB （1.14±0.11） ewes showed higher levels compared with AA （0.44±0.11） and AB （0.36±0.08） ewes （P〈0.01）, and LHR mRNA extracted from the right ovary of BB （0.42±0.02） ewes showed significantly higher levels compared with AA （0.23±0.02） and AB （0.25±0.04） ewes （P〈0.01）; however, the mRNA extracted from the left ovary showed no significant difference in levels among the genotypes during the oestrum. It indicated that the fecundity induced by a mutation of BMPRIB in Small Tail Han sheep may be related to the changes of the mRNA expression of LHR and FSHR in ovary.展开更多
骨形态发生蛋白受体1B(Bone morphogenetic protein receptor 1B,BMPR1B)是一种重要的跨膜受体蛋白,主要参与转化生长因子β(TGF-β)通路,其在调控成骨分化、细胞扩散以及卵巢卵泡发育等过程中起重要作用,并直接影响如绵羊等动物的繁殖...骨形态发生蛋白受体1B(Bone morphogenetic protein receptor 1B,BMPR1B)是一种重要的跨膜受体蛋白,主要参与转化生长因子β(TGF-β)通路,其在调控成骨分化、细胞扩散以及卵巢卵泡发育等过程中起重要作用,并直接影响如绵羊等动物的繁殖性状。绵羊BMPR1B基因发生A746G突变(命名为FecB突变),导致第249位氨基酸由谷氨酰胺(Q)转变为精氨酸(R),进而使得绵羊排卵数和产羔数显著增加,因此BMPR1B成为目前最受关注的绵羊多羔主效基因。论文就绵羊BMPR1B基因定位、功能机制研究进展及其对高繁殖力绵羊的影响进行了综述,同时也对BMPR1B功能研究中一些亟待解决的问题展开了讨论。展开更多
In 1903, Farabee analyzed the heredity of the human digital malformation, brachydactyly, the first recorded disorder of the autosomal dominant Mendelian trait. In 1951, Bell classified this type of brachydactyly as ty...In 1903, Farabee analyzed the heredity of the human digital malformation, brachydactyly, the first recorded disorder of the autosomal dominant Mendelian trait. In 1951, Bell classified this type of brachydactyly as type A1 (BDA1). Over 100 cases from different ethnic groups have so far been reported. However, the real breakthrough in identifying the cause of BDA1 has only taken place in the last few years with the progress of the mapping and identification of one of the genes responsible for this disorder, thus providing an answer for a century old riddle. In this article, we attempt to review the current state of knowledge on the genetic features of BDA1 with its century-old history and signalling pathway of IHH, and also discuss genotype-phenotype correlation not only of BDA l, but also of all types of brachydactyly.展开更多
文摘The relationship between different BMPRIB genotypes of Small Tail Han sheep and FSHR and LHR mRNA levels during the oestrum was studied using semiquantitative PCR. The results indicated that FSHR mRNA extracted from the right ovary of BB （1.14±0.11） ewes showed higher levels compared with AA （0.44±0.11） and AB （0.36±0.08） ewes （P〈0.01）, and LHR mRNA extracted from the right ovary of BB （0.42±0.02） ewes showed significantly higher levels compared with AA （0.23±0.02） and AB （0.25±0.04） ewes （P〈0.01）; however, the mRNA extracted from the left ovary showed no significant difference in levels among the genotypes during the oestrum. It indicated that the fecundity induced by a mutation of BMPRIB in Small Tail Han sheep may be related to the changes of the mRNA expression of LHR and FSHR in ovary.
文摘骨形态发生蛋白受体1B(Bone morphogenetic protein receptor 1B,BMPR1B)是一种重要的跨膜受体蛋白,主要参与转化生长因子β(TGF-β)通路,其在调控成骨分化、细胞扩散以及卵巢卵泡发育等过程中起重要作用,并直接影响如绵羊等动物的繁殖性状。绵羊BMPR1B基因发生A746G突变(命名为FecB突变),导致第249位氨基酸由谷氨酰胺(Q)转变为精氨酸(R),进而使得绵羊排卵数和产羔数显著增加,因此BMPR1B成为目前最受关注的绵羊多羔主效基因。论文就绵羊BMPR1B基因定位、功能机制研究进展及其对高繁殖力绵羊的影响进行了综述,同时也对BMPR1B功能研究中一些亟待解决的问题展开了讨论。
基金This project was supported by NSFC/RGC joint Research Grant(No.N-HKU705/02)the Major State Basic Research Development Program of China(No.2001CB5 10301).
文摘In 1903, Farabee analyzed the heredity of the human digital malformation, brachydactyly, the first recorded disorder of the autosomal dominant Mendelian trait. In 1951, Bell classified this type of brachydactyly as type A1 (BDA1). Over 100 cases from different ethnic groups have so far been reported. However, the real breakthrough in identifying the cause of BDA1 has only taken place in the last few years with the progress of the mapping and identification of one of the genes responsible for this disorder, thus providing an answer for a century old riddle. In this article, we attempt to review the current state of knowledge on the genetic features of BDA1 with its century-old history and signalling pathway of IHH, and also discuss genotype-phenotype correlation not only of BDA l, but also of all types of brachydactyly.
