Chen C, Xu R. The in vitro regulation of growth hormone secretion by orexins. Endocrine. 2003;22:57-66 pubmed
..It is therefore suggested that orexins may play an important role in regulating GHRH-stimulated GH secretion through an increase in the L-type Ca2+ current and the PKC-mediated signaling pathways in ovine somatotropes. ..