Differential tissue-regulation of myostatin genes in the teleost fish Lates calcarifer in response to fasting. Evidence for functional differentiation
De Santis, C., and Jerry, D.R. (2011) Differential tissue-regulation of myostatin genes in the teleost fish Lates calcarifer in response to fasting. Evidence for functional differentiation. Molecular and Cellular Endocrinology, 335 (2). 158-165 .
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Gene or genome duplication is a fundamental evolutionary mechanism leading towards the origin of new genes, or gene functions. Myostatin (MSTN) is a negative regulator of muscle growth that in teleost fish, as a result of genome duplication, is present in double copy. This study provides evidence of differentiation of MSTN paralogs in fish by comparatively exploring their tissue-regulation in the Asian sea bass (Lates calcarifer) when subjected to fasting stress. Results showed differential regulation as well as specific tissue-responses in the muscle, liver, gill and brain of L. calcarifer after nutritional deprivation. In particular, the LcMstn-1 expression increased in liver (~4 fold) and muscle (~3 fold) and diminished in brain (~0.5 fold) and gill (~0.5 fold) while that of LcMstn-2 remained stable in brain and muscle and was up regulated in gill (~2.5 fold) and liver (~2 fold). Differential regulation of Mstn paralogs was supported by in silico analyses of regulatory motifs that revealed, at least in the immediate region upstream the genes, a differentiation between Mstn-1 and Mstn-2. The Mstn-1 in particular showed a significantly higher conservation of regulatory sites among teleost species compared to its paralog indicating that this gene might have a highly conserved function in the taxon.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||myostatin; fasting; Lates calcarifer; tissue-expression; cis-elements; gene duplication|
|Date Deposited:||18 Aug 2011 02:29|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0604 Genetics > 060405 Gene Expression (incl Microarray and other genome-wide approaches) @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 50%
|SEO Codes:||83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 100%|
|Citation Count from Web of Science||