Journal article
Steroidogenic acute regulatory protein in white sturgeon (Acipenser transmontanus): cDNA cloning, sites of expression and transcript abundance in corticosteroidogenic tissue after an acute stressor
General and comparative endocrinology, Vol.162(2), pp.233-240
06/2009
Handle:
https://hdl.handle.net/2376/105870
PMID: 19245813
Abstract
The white sturgeon, Acipenser transmontanus, is a primitive bony fish that is recognized as an important emerging species for aquaculture. However, many aspects of its stress and reproductive physiology remain unclear. These processes are controlled by various steroid hormones. In order to investigate the regulation of steroidogenesis associated with acute stress in sturgeon, a cDNA-encoding steroidogenic acute regulatory protein (StAR) was isolated from white sturgeon. The putative amino acid sequence of sturgeon StAR shares high homology (over 60%) with other vertebrates. Phylogenetic analysis grouped sturgeon StAR within Actinopterygii, but it was clearly segregated from teleost StARs. RT-PCR analysis revealed that transcripts were most abundant in yellow corpuscles found throughout the kidney and weaker signals were detected in gonad and kidney. Very weak signals were also detected in brain and spleen by quantitative real-time PCR. In situ hybridization revealed that StAR is expressed in the cells of yellow corpuscles. No significant changes in StAR gene expression were detected in response to an acute handling stress. These results suggest that StAR is highly conserved throughout vertebrates, but the expression of the functional protein during the stress response may be partially regulated post-transcriptionally.
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Details
- Title
- Steroidogenic acute regulatory protein in white sturgeon (Acipenser transmontanus): cDNA cloning, sites of expression and transcript abundance in corticosteroidogenic tissue after an acute stressor
- Creators
- Makoto Kusakabe - School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USAMicah D Zuccarelli - Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USAIkumi Nakamura - School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USAGraham Young - School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA
- Publication Details
- General and comparative endocrinology, Vol.162(2), pp.233-240
- Academic Unit
- UNKNOWN
- Publisher
- Elsevier Inc
- Identifiers
- 99900546719901842
- Language
- English
- Resource Type
- Journal article