Involvement of hypothalamic neuropeptide Y in pentazocine induced suppression of food intake in rats

Nandkishor R. Kotagale, Manoj Upadhya, Pravin N. Hadole, Dadasaheb M. Kokare, Brijesh G. Taksande

Research output: Contribution to journalArticle

Abstract

The potent orexigenic peptide neuropeptide Y (NPY) has been considered as a possible endogenous ligand for a subpopulation of sigma receptors (SigR). However, their mutual interaction with reference to feeding behavior remains poorly understood. In the present study, we explored the possible interaction between sigma1 receptors (Sig1R) agonist, pentazocine, and NPY on food intake in satiated rats. While pentazocine dose-dependently reduced the food intake, NPY significantly increased it at 2, 4 and 6 h post injection time points. In combination studies, pretreatment with NPY (0.1 nmol/rat, intra-PVN) normalized the inhibitory effect of pentazocine (60 μg/rat, intra-PVN) on food intake. Similarly, pre-treatment with pentazocine (30 μg/rat, intra-PVN) significantly antagonized the orexigenic effect of NPY (0.5 and 1.0 nmol/rat, intra-PVN). Moreover, pentazocine treatment decreased NPY immunoreactivity in arcuate (ARC), paraventricular (PVN), dorsomedial (DMH) and ventromedial (VMH) nuclei of hypothalamus. However, no change was observed in lateral hypothalamus (LH). Study implicates the reduced NPY immunoreactivity for the anorectic effect observed following pentazocine injections. Therefore, the concomitant activation of the NPYergic system along with the Sig1R agonist treatment may serve a useful purpose in the management of the unwanted side effects related to energy homeostasis.
Original languageEnglish
Pages (from-to)133-141
JournalNeuropeptides
Volume48
Issue number3
DOIs
Publication statusPublished - 1 Jun 2014

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Pentazocine
Neuropeptide Y
Eating
Dimenhydrinate
sigma Receptors
Lateral Hypothalamic Area
Appetite Depressants
Injections
Feeding Behavior
Hypothalamus
Homeostasis
Therapeutics
Ligands
Peptides

Cite this

Kotagale, Nandkishor R. ; Upadhya, Manoj ; Hadole, Pravin N. ; Kokare, Dadasaheb M. ; Taksande, Brijesh G. / Involvement of hypothalamic neuropeptide Y in pentazocine induced suppression of food intake in rats. In: Neuropeptides. 2014 ; Vol. 48, No. 3. pp. 133-141.
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Involvement of hypothalamic neuropeptide Y in pentazocine induced suppression of food intake in rats. / Kotagale, Nandkishor R.; Upadhya, Manoj; Hadole, Pravin N.; Kokare, Dadasaheb M.; Taksande, Brijesh G.

In: Neuropeptides, Vol. 48, No. 3, 01.06.2014, p. 133-141.

Research output: Contribution to journalArticle

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AU - Kotagale, Nandkishor R.

AU - Upadhya, Manoj

AU - Hadole, Pravin N.

AU - Kokare, Dadasaheb M.

AU - Taksande, Brijesh G.

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