Evidence that central pathways that mediate defecation utilize ghrelin receptors but do not require endogenous ghrelin
Ruslan V Pustovit, Brid Callaghan, Mitchell T Ringuet, Nicole F Kerr, Billie Hunne, Ian M Smyth, Claudio Pietra, John B Furness
PHYSIOLOGICAL REPORTS | WILEY | Published : 2017
In laboratory animals and in human, centrally penetrant ghrelin receptor agonists, given systemically or orally, cause defecation. Animal studies show that the effect is due to activation of ghrelin receptors in the spinal lumbosacral defecation centers. However, it is not known whether there is a physiological role of ghrelin or the ghrelin receptor in the control of defecation. Using immunohistochemistry and immunoassay, we detected and measured ghrelin in the stomach, but were unable to detect ghrelin by either method in the lumbosacral spinal cord, or other regions of the CNS In rats in which the thoracic spinal cord was transected 5 weeks before, the effects of a ghrelin agonist on colo..View full abstract
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Awarded by National Health and Medical Research Council of Australia
This work was supported by a grant from The National Health and Medical Research Council of Australia, grant number APP1079739.