CDNA cloning of feline leptin and its mRNA expression in adipose tissue.
Leptin, the product of the obese (ob) gene, is an adipocyte-derived hormone involved in regulating food intake and energy expenditure in humans and rodents. To determine the primary structure of feline leptin, we cloned the feline leptin cDNA using reverse transcription-polymerase chain reaction (RT-PCR) and rapid amplification of complementary DNA (cDNA) ends (RACE) methods. The full-length feline leptin cDNA was 2935 bp with a 501 bp open reading frame encoding the precursor peptide of 167 amino acids including 21 residues of signal peptide. The sequence of a 146-amino acid mature leptin was 81.5-91.8% homologous to those of other species. RT-PCR analysis revealed that the leptin mRNA was expressed in adipose tissues and not detected in liver, heart, kidney, lung, pancreas. brain and skeletal muscle. These data show that feline leptin is highly homologous to leptins of other species, and expressed in adipose tissues in cats.[1]References
- CDNA cloning of feline leptin and its mRNA expression in adipose tissue. Sasaki, N., Shibata, H., Honjoh, T., Kimura, K., Saito, M., Ohishi, I. J. Vet. Med. Sci. (2001) [Pubmed]
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