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Molecular and physiological evidences for the role in appetite regulation of apelin and its receptor APJ in Ya-fish (Schizothorax prenanti)
- Source :
- Molecular and cellular endocrinology. 396(1-2)
- Publication Year :
- 2014
-
Abstract
- Apelin is a recently discovered peptide produced by several tissues with diverse physiological actions mediated by its receptor APJ. In order to better understand the role of apelin in the regulation of appetite in fish, we cloned the cDNAs encoding apelin and APJ, and investigated their mRNA distributions in Ya-fish (Schizothorax prenanti) tissues. We also assessed the effects of different nutritional status on apelin and APJ mRNAs abundance. Apelin and APJ mRNAs were ubiquitously expressed in all tissues tested, relatively high expression levels were detected in the heart, spleen, hypothalamus and kidney. Short-term fasting significant increased APJ mRNA expression, but no significant difference between fasted fish and fed control on 5- and 7-day. Meanwhile, apelin mRNA expression consistently increased during the 7-day food deprivation. In order to further characterize apelin in fish, we performed intraperitoneal (i.p.) injection of apelin-13 and examined food intake of the injected fish. Apelin injected at a dose of 100 ng/g body weight induced a significant increase in food intake compared to saline injected fish. Our results suggest that apelin acts as an orexigenic factor in Ya-fish. Their widespread distributions also suggest that apelin and APJ might play multiple physiological regulating roles in fish.
- Subjects :
- medicine.medical_specialty
media_common.quotation_subject
Molecular Sequence Data
Hypothalamus
Appetite
Kidney
Biochemistry
Receptors, G-Protein-Coupled
Eating
Endocrinology
Orexigenic
Internal medicine
medicine
Escherichia coli
Animals
Amino Acid Sequence
RNA, Messenger
Cloning, Molecular
Receptor
Molecular Biology
Phylogeny
media_common
Messenger RNA
biology
Base Sequence
Sequence Homology, Amino Acid
Appetite Regulation
Myocardium
Fishes
Fasting
biology.organism_classification
Schizothorax prenanti
Recombinant Proteins
Apelin
medicine.anatomical_structure
Gene Expression Regulation
Intercellular Signaling Peptides and Proteins
Food Deprivation
Injections, Intraperitoneal
Spleen
medicine.drug
Subjects
Details
- ISSN :
- 18728057
- Volume :
- 396
- Issue :
- 1-2
- Database :
- OpenAIRE
- Journal :
- Molecular and cellular endocrinology
- Accession number :
- edsair.doi.dedup.....ea9a8d2ed5c14cbce0ca2ab6cd9c6e44