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The study of polymorphism within the promoter region of the osteopontin (OPN) gene in sows.

Neuro Endocrinol. Lett.2009;30(4):525-9
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摘要


OBJECTIVES:The aim of the present study was to find a possible polymorphism in the promoter region of the osteopontin (OPN) gene, as a potential mutation region, connected with the transcription factor-binding sites or regulatory sequences and to estimate the expression of this gene in ovaries and oviduct of sows. MATERIAL AND METHODS:Sixty wbp x pbz sows after the first mating were slaughtered and tissues samples of the ovaries and oviduct were taken. Primer pairs for PCR analysis were designed on the basis of swine osteopontin 5' end sequence driven from GenBank. This study's amplified DNA fragment, spanning 274 bp of the promoter region, was chosen because of its contents of tree specific sites: type II collagen silence sequence (CACCTCC) at -682 (from the transcription initiation site), glucocortIcoid response site (TGTCCT) at -658 and CAAT box -592. This DNA fragment was subjected to a MSSCP analysis. RESULTS:A different MSSCP pattern was shown which indicates that mutation is located in this region. The samples of different conformers were sequenced and the A --> G transitions was identified in two positions -617 and -608. Restriction analysis of the DNA was performed, but unfortunately none of the known restriction enzymes recognized the novel SNPs, which is why the specific primer pairs characteristic for nucleotide A or for nucleotide G were chosen. In the second stage of the presented study the total RNA was extracted from the tissues of the ovaries and oviduct and the complementary DNA (cDNA) was synthesized. CONCLUSION:The real-time PCR analysis to determined the expression dynamics of the OPN gene in pig tissues was performed.

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