Objective:To construct inhibin expression vector with high immunogenicity.Methods:S gene with enzyme site sequence of EcoR I and Nde I was amplified by PCR from pCMV-S;Inhibin(1-32)gene with enzyme site sequence of Nde I and Hind III was cut from pUI;S and inhibin(1-32)gene were directly inserted into pcDNA3.1(-)and the recombinant pCIS was identified by restriction endonculease digestion and sequencing;then pCIS was transfected into HeLa cells.SDS-PAGE and ELISA was employed to detect the cell product.Rats were immunized with inhibin fused expression plasmid pCIS and ELISA was used to detect the blood antibody against inhibin.Results:The recombinant eukaryocyte expression vector of inhibin was constructed.The sequence of the insert was identical to designed gene.Fusion protein weight was about 29 kD and it had inhibin immunologic activity.Rats immunized with pCIS induced antibody against inhibin.Conclusion:The fusion gene expression vector was successfully constructed,and it set up the basis of inhibin gene immunization to induce multiple bear for single birth animals.

OBJECTIVE:Bone morphogenetic protein (BMP) plays a vital role in the prevention and treatment of skeleton diseases, recently researches on the molecular mechanism of sheep prolific FecB gene indicated that BMP and its receptors have important influence on animal follicular development. In this study the influence of different type BMPs andits receptors on the follicular development was reviewed in order to explore effective modulation on animal reproduction.DATA SOURCES: Computer was applied to retrieve Medline database on the related literatures from January 1998 to June 2005. The retrieval words were "BMP" and "BMPR" that combined respectively. Language in the articles was limited to English. Simultaneously related articles were also computer searched in China periodical full text database and Wanfang databases from January 1996 to December 2005 with the retrieval words of "BMP, BMPR", that limiting the article language to Chinese.STUDY SELECTION: At first, the document was retrieved, altogether 200 studies on BMP and its receptors were enrolled including 140 Chinese literatures and 60 English literatures.DATA EXTRACTION: these literatures were screened and 30 were included for relating to the BMP characteristic, as well as the influence of BMP and its receptors on follicular development and reproductive endocrine.DATA SYNTHESIS: Of the 30 literatures, 18 experiments discussed the function of BMP and its receptors and its signal transduction mechanism,12 were about the influence of different BMP on reproductive cell secretion, as well as receptor mutation on ovulation.CONCLUSION: BMPs family plays vital role in animal reproductive modulation, current experiments prove that the changes of signal transduction due to BMP receptor gene mutation has made breakthrough for the exploration of the prolific mechanism in sheep. Moreover studies on follicular development modulation and ovulation mechanism are liable to provide theoretical reference for the prolific modulation in sheep or other species.