RGD Reference Report - Effects of ghrelin on gastric distension sensitive neurons and gastric motility in the lateral septum and arcuate nucleus regulation. - Rat Genome Database

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Effects of ghrelin on gastric distension sensitive neurons and gastric motility in the lateral septum and arcuate nucleus regulation.

Authors: Gong, Yanling  Xu, Luo  Guo, Feifei  Pang, Mingjie  Shi, Zhenyan  Gao, Shengli  Sun, Xiangrong 
Citation: Gong Y, etal., J Gastroenterol. 2014 Feb;49(2):219-30. doi: 10.1007/s00535-013-0789-y. Epub 2013 Mar 26.
RGD ID: 12907567
Pubmed: PMID:23525979   (View Abstract at PubMed)
DOI: DOI:10.1007/s00535-013-0789-y   (Journal Full-text)


BACKGROUND: Ghrelin is an endogenous ligand for the growth hormone secretagogue receptor (GHS-R) and a peptide hormone that promotes food intake and gastric motility. Our aims are to explore the effects of ghrelin on gastric distension (GD) sensitive neurons in the lateral septum, and the possible regulation of gastric motility by ghrelin through the hypothalamic arcuate nucleus (ARC).
METHODS: Single-unit discharges were recorded, extracellularly, and the gastric motility was monitored by the administration of ghrelin in the lateral septum. The projection of nerve fiber and expression of ghrelin were observed by retrograde tracer and fluo-immunohistochemistry staining. The expression of GHS-R and ghrelin was determined by real-time polymerase chain reaction and western blotting analysis.
RESULTS: There were GD neurons in the lateral septum. The administration of ghrelin could excite both GD-excitatory (GD-E) and GD-inhibitory (GD-I) neurons in the lateral septum. Gastric motility was significantly enhanced by the administration of ghrelin in the lateral septum in a dose-dependent manner. Pretreatment with [D-Lys-3]-GHRP-6, however, could completely abolish the ghrelin-induced effects. Electrical stimulation of the ARC could significantly excite the response of GD neurons to ghrelin, increase ghrelin protein expression in the lateral septum and promote gastric motility. Nevertheless, these effects could be mitigated by pretreatment of [D-Lys-3]-GHRP-6. Electrical lesion of the lateral septum resulted in decreased gastric motility. The GHS-R and Ghrelin/FG-double labeled neurons were observed in the lateral septum and ARC, respectively.
CONCLUSIONS: It is suggested that the lateral septum may receive afferent information from the gastrointestinal tract and promote gastric motility. Ghrelin plays an important role in promoting gastric motility in the lateral septum. The ARC may be involved in the regulation of the lateral septum's influence on gastric motility.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
GhrlRatregulation of gastric motility  IDA  RGD 
GhsrRatregulation of gastric motility  IMP  RGD 
GhrlRatregulation of transmission of nerve impulse  IDA  RGD 
GhsrRatregulation of transmission of nerve impulse  IMP  RGD 
GhrlRatresponse to electrical stimulus  IEP  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Ghrl  (ghrelin and obestatin prepropeptide)
Ghsr  (growth hormone secretagogue receptor)


Additional Information