Effects of direct QRFP-26 administration into the medial hypothalamic area on food intake in rats

Olga Zagorácz, Anita Kovács, Kristóf László, Tamás Ollmann, László Péczely, L. Lénárd

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The RFamide peptide family comprises a number of biologically active peptides sharing RF motif at their C-terminal end. These peptides are involved in the control of multiple physiological functions including regulation of metabolism and feeding behavior. QRFP-43 as well as its 26-aminoacid residue QRFP-26 are able to cause orexigenic effect when administered to the rodents' cerebral ventricles. QRFPs have been suggested as the endogenous ligands of the previously orphan GPR103 receptors. GPR103 receptors share amino acid identity with other receptors of neuropeptides involved in feeding (NPY, NPFF, galanin). QRFP-26 expressing neurons and binding sites are densely present in the rat medial hypothalamus (MHA), an area directly responsible for the regulation of feeding. QRFP-26 was delivered to the target area by direct intrahypothalamic microinjection, and the consumption of liquid food was measured over a 60 min period. Both doses (100 and 200. ng) significantly increased food intake. Non-specific receptor antagonist BIBP3226 eliminated the orexigenic effect caused by QRFP-26 administration. Effective doses of QRFP-26 did not modify general locomotor activity and behavioral patterns examined in the open-field test. This study is the first reporting feeding modulating effects following direct intrahypothalamic QRFP-26 administration.

Original languageEnglish
Pages (from-to)58-64
Number of pages7
JournalBrain Research Bulletin
Volume118
DOIs
Publication statusPublished - Sep 1 2015

Fingerprint

Eating
Amino Acid Receptors
Neuropeptide Receptors
Middle Hypothalamus
Galanin
Cerebral Ventricles
Peptides
Orphaned Children
Microinjections
Feeding Behavior
Locomotion
Rodentia
Binding Sites
Ligands
Neurons
Food
BIBP 3226
RFamide peptide
phenylalanyl-leucyl-phenylalanyl-glutaminyl-prolyl-glutaminyl-arginyl-phenylalaninamide

Keywords

  • Food intake
  • Hypothalamus
  • Open-field test
  • QRFP-26
  • Receptor antagonist BIBP3226

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Effects of direct QRFP-26 administration into the medial hypothalamic area on food intake in rats. / Zagorácz, Olga; Kovács, Anita; László, Kristóf; Ollmann, Tamás; Péczely, László; Lénárd, L.

In: Brain Research Bulletin, Vol. 118, 01.09.2015, p. 58-64.

Research output: Contribution to journalArticle

Zagorácz, Olga ; Kovács, Anita ; László, Kristóf ; Ollmann, Tamás ; Péczely, László ; Lénárd, L. / Effects of direct QRFP-26 administration into the medial hypothalamic area on food intake in rats. In: Brain Research Bulletin. 2015 ; Vol. 118. pp. 58-64.
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