Milk protein-derived peptides induce 5-HT2C-mediated satiety invivo

  • Harriët Schellekens
  • , Alice B. Nongonierma
  • , Gerard Clarke
  • , Wesley E.P.A. van Oeffelen
  • , Richard J. FitzGerald
  • , Timothy G. Dinan
  • , John F. Cryan

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigates the ability of milk protein-derived peptides to specifically activate the serotonin 2C (5-HT2C) receptor, a key receptor in central regulation of food intake. A dose dependent 5-HT2C receptor activation by the 1kDa ultrafiltration permeates of a sodium caseinate (NaCNH-1kDa permeate) and a whey protein hydrolysate (WPH-1kDa permeate) was demonstrated using an intracellular calcium mobilisation assay in human embryonic kidney (Hek) cells expressing the 5-HT2C receptor. Both samples activated the 5-HT2C but not the 5-HT2A and 5-HT2B receptors. NaCNH-1kDa permeate significantly (p<0.01) reduced cumulative food intake when administered to male mice (C57Bl/6) by intraperitoneal injection at 500mgkg-1 body weight. In contrast, no effect of WPH-1kDa permeate could be seen on food intake invivo. These results demonstrate the promising appetite-suppressing potential of NaCN-derived peptides, targeting the 5-HT2C receptor.

Original languageEnglish
Pages (from-to)55-64
Number of pages10
JournalInternational Dairy Journal
Volume38
Issue number1
DOIs
Publication statusPublished - Sep 2014

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