title: Ovary-specific novel peroxisome proliferator activated receptors-gamma transcripts in buffalo.
abstract: In the present study, we describe the isolation and characterization of the transcripts encoding peroxisome proliferator-activated receptor gamma (PPARγ1 and PPARγ2) in buffalo ovary. 5' RACE experiments and sequence analysis showed that these transcripts (PPARγ1a, PPARγ1b and PPARγ2) were transcribed by the different promoter usage and alternative splicing of terminal 5'-exon. The distribution of these isoforms of PPARγ transcripts in different tissues (ovary, mammary gland, spleen, liver, lung, adipose tissue) was investigated using quantitative real time analysis. Tissue- and transcript-specific expression analyses showed that a transcript, transcribed from distal promoter, not only expressed preferentially in ovary but contributes predominantly to PPAR gamma expression in ovary. Western blot analysis of both, in vivo and in vitro, experiments also supported that PPARγ1 predominantly expressed in ovary. In buffalo granulosa cells culture, the isolated transcripts were found to be up-regulated by both natural (CLA) and synthetic (Rosiglitazone) ligands and effect was reversed by PPARγ antagonist GW9662. In conclusion, the present study identified an ovary-specific novel transcript, transcribed by distal promoter, predominantly expressed in ovary which could have functional relevance in buffalo ovary.
authors.affiliation: Molecular Endocrinology Laboratory, Animal Biochemistry Division, National Dairy Research Institute, Karnal, Haryana, India.
authors.forename: Isha
authors.initials: I
authors.lastname: Sharma
authors.forename: Rachna
authors.initials: R
authors.lastname: Monga
authors.forename: Natwar
authors.initials: N
authors.lastname: Singh
authors.forename: Tirtha Kumar
authors.initials: TK
authors.lastname: Datta
authors.forename: Dheer
authors.initials: D
authors.lastname: Singh
mesh_terms: D017398:Alternative Splicing; D000818:Animals; D001483:Base Sequence; D015153:Blotting, Western; D002020:Buffaloes; D017931:DNA Primers; D005091:Exons; D005260:Female; D008969:Molecular Sequence Data; D010053:Ovary / Q000378:metabolism*; D047495:PPAR gamma / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012333:RNA, Messenger / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid
chemical_list: D017931:DNA Primers; D047495:PPAR gamma; D012333:RNA, Messenger