1. [cDNA cloning and analysis of tissue-specific gene expression of rat urocortin II].
- Author
-
Chae JI, Ju SK, Lee MK, Park JH, Yoon JH, Shim JH, and Lee DS
- Subjects
- Animals, Cell Line, Cloning, Molecular, Corticotropin-Releasing Hormone genetics, Corticotropin-Releasing Hormone pharmacology, DNA, Complementary genetics, Gene Expression Regulation drug effects, Humans, Mice, Organ Specificity physiology, Protein Binding physiology, Rats, Receptors, Corticotropin-Releasing Hormone metabolism, Recombinant Proteins pharmacology, Urocortins genetics, Urocortins pharmacology, Corticotropin-Releasing Hormone biosynthesis, Gene Expression Regulation physiology, Urocortins biosynthesis
- Abstract
The corticotropin-releasing hormone (CRH) family of neuropeptides includes CRH (a 41 amino acid hypothalamic peptide) and urocortin. Corticotropin-releasing factor (CRF), a peptide first isolated from mammalian, plays an important role in the regulation of the pituitary-adrenal axis, and in endocrine, autonomic, immune and behavioral responses to stress. In this study we cloned rat urocortin II (UCNII) cDNA from rat mid-brain by RT-PCR. The rat UCNII clone contained an open reading frame (ORF) coding 109 amino acids which shared 90% and 63% homology with mouse and human homologues, respectively, The expression of UCN HII mRNA is mainly distributed in bone marrow, ovary, uterus, hypophysis, adrenal gland, and skin. In this study, rat recombinant UCN was expressed in E. coli and purified in active form. Furthermore, purified recombinant UCN II protein specifically binds to CRF receptor 2 in rat ROS 17/2.8 and GH3 cells by flow-cytometry analysis. UCN II cDNA clone obtained in this study will be useful for further investigation on behavioral responses to stress in rats.
- Published
- 2009