PMID- 24024131 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20130911 LR - 20211021 IS - 2212-8778 (Print) IS - 2212-8778 (Electronic) IS - 2212-8778 (Linking) VI - 2 IP - 1 DP - 2013 TI - Ghrelin regulates hypothalamic prolyl carboxypeptidase expression in mice. PG - 23-30 LID - 10.1016/j.molmet.2013.01.002 [doi] AB - Hypothalamic Prolyl carboxypeptidase (PRCP) plays a role in the regulation of energy metabolism by inactivating hypothalamic alpha-melanocyte stimulating hormone (alpha-MSH) levels and thus affecting melanocortin signaling. Alpha-MSH production is highly regulated both at transcriptional and posttranslational levels. Here we show that fasting induces a hypothalamic-specific up-regulation of Prcp mRNA and protein levels. Since fasting is characterized by elevated circulating ghrelin levels, we tested the effect of peripheral and central administration of ghrelin, and found that ghrelin increases hypothalamic Prcp mRNA expression. No changes in Prcp mRNA levels were detected in ghrelin knockout mice compared to their controls. Finally, ghrelin effect on PRCP expression was ghrelin receptor-mediated. Altogether our data show that ghrelin is a key regulator of hypothalamic PRCP expression, and up-regulation of PRCP by ghrelin may be an additional mechanism to decrease melanocortin signaling. FAU - Kwon Jeong, Jin AU - Kwon Jeong J AD - Program in Integrative Cell Signaling and Neurobiology of Metabolism, New Haven, CT, 06520, USA ; Department of Ob/Gyn & Reproductive Sciences, New Haven, CT, 06520, USA. FAU - Dae Kim, Jung AU - Dae Kim J FAU - Diano, Sabrina AU - Diano S LA - eng GR - R01 DK084065/DK/NIDDK NIH HHS/United States PT - Journal Article DEP - 20130111 PL - Germany TA - Mol Metab JT - Molecular metabolism JID - 101605730 PMC - PMC3757664 OTO - NOTNLM OT - (ARC), Arcuate nucleus OT - (AgRP), Agouti related peptide OT - (CTX), Cortex OT - (DMH), Dorsomedial nucleus OT - (GHS-R), Growth hormone secretagogue receptor OT - (Hcrt), Hypocretin OT - (LH), Lateral hypothalamus OT - (MCH), Melanin concentrating hormone OT - (NPY), Neuropeptide Y OT - (POMC), Proopiomelanocortin OT - (PRCP), Prolyl carboxypeptidase OT - (Prcpgt/gt), Prcp-ablated mice OT - (VMH), Ventromedial nucleus OT - (alpha-MSH), alpha-Melanocyte stimulating hormone OT - Alpha-melanocyte stimulating hormone OT - Fasting OT - Ghrelin OT - Hypothalamus OT - Prolyl carboxypeptidase EDAT- 2013/09/12 06:00 MHDA- 2013/09/12 06:01 PMCR- 2013/01/11 CRDT- 2013/09/12 06:00 PHST- 2012/12/11 00:00 [received] PHST- 2012/12/28 00:00 [revised] PHST- 2013/01/03 00:00 [accepted] PHST- 2013/09/12 06:00 [entrez] PHST- 2013/09/12 06:00 [pubmed] PHST- 2013/09/12 06:01 [medline] PHST- 2013/01/11 00:00 [pmc-release] AID - MOLMET25 [pii] AID - 10.1016/j.molmet.2013.01.002 [doi] PST - epublish SO - Mol Metab. 2013 Jan 11;2(1):23-30. doi: 10.1016/j.molmet.2013.01.002. eCollection 2013.