A role for galanin-like peptide in the integration of feeding, body weight regulation, and reproduction in the mouse

Stephanie Krasnow, Gregory S. Fraley, Sonya M. Schuh, James W. Baumgartner, Donald K. Clifton, Robert A. Steiner

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

Galanin-like peptide (GALP) shares sequence homology with galanin and binds to galanin receptors in vitro. GALP neurons in the arcuate nucleus coexpress leptin receptors, and GALP mRNA expression is up-regulated by leptin. Based on these observations, we postulated that GALP plays a role in mediating leptin's inhibitory effects on food intake (FI) and body weight (BW), as well as its stimulatory effect on the reproductive axis. To test these hypotheses, we performed several studies in which mice received intracerebroventricular injections of either GALP or vehicle. Acute GALP treatment elicited a dose-dependent suppression of FI and BW. Long-term treatment with GALP caused only transient reductions in FI and BW, demonstrating that the mice became refractory to continued exposure to GALP. GALP inhibited FI as early as 1 h post injection. Central injection of GALP suppressed locomotor activity and elicited the formation of a conditioned taste aversion. In male mice, serum levels of LH and testosterone were increased by GALP administration. Although we cannot rule out possible nonspecific effects of GALP on FI, the present observations are consistent with the argument that GALP is a downstream effector of leptin's actions within the central nervous system.

Original languageEnglish (US)
Pages (from-to)813-822
Number of pages10
JournalEndocrinology
Volume144
Issue number3
DOIs
StatePublished - Mar 1 2003
Externally publishedYes

Fingerprint

Galanin-Like Peptide
Reproduction
Body Weight
Eating
Leptin
Injections
Galanin Receptors
Galanin
Leptin Receptors
Arcuate Nucleus of Hypothalamus

ASJC Scopus subject areas

  • Endocrinology
  • Endocrinology, Diabetes and Metabolism

Cite this

Krasnow, S., Fraley, G. S., Schuh, S. M., Baumgartner, J. W., Clifton, D. K., & Steiner, R. A. (2003). A role for galanin-like peptide in the integration of feeding, body weight regulation, and reproduction in the mouse. Endocrinology, 144(3), 813-822. https://doi.org/10.1210/en.2002-220982

A role for galanin-like peptide in the integration of feeding, body weight regulation, and reproduction in the mouse. / Krasnow, Stephanie; Fraley, Gregory S.; Schuh, Sonya M.; Baumgartner, James W.; Clifton, Donald K.; Steiner, Robert A.

In: Endocrinology, Vol. 144, No. 3, 01.03.2003, p. 813-822.

Research output: Contribution to journalArticle

Krasnow, S, Fraley, GS, Schuh, SM, Baumgartner, JW, Clifton, DK & Steiner, RA 2003, 'A role for galanin-like peptide in the integration of feeding, body weight regulation, and reproduction in the mouse', Endocrinology, vol. 144, no. 3, pp. 813-822. https://doi.org/10.1210/en.2002-220982
Krasnow, Stephanie ; Fraley, Gregory S. ; Schuh, Sonya M. ; Baumgartner, James W. ; Clifton, Donald K. ; Steiner, Robert A. / A role for galanin-like peptide in the integration of feeding, body weight regulation, and reproduction in the mouse. In: Endocrinology. 2003 ; Vol. 144, No. 3. pp. 813-822.
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