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Central visfatin causes orexigenic effects in chicks.

Mark A Cline¹, Wint Nandar, Brian C Prall

¹Department of Biology (6931), Radford University, Radford, VA 24142, USA. mcline@radford.edu

Behavioural Brain Research

|October 9, 2007

Summary

Intracerebroventricular injection of visfatin increased feed intake and pecking efficiency in chicks, suggesting it has orexigenic effects. This study investigated visfatin

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Area of Science:

Neuroendocrinology
Avian Physiology
Appetite Regulation

Background:

Visfatin, an adipokine, plays a role in energy homeostasis.
Its effects on appetite regulation in avian species are not fully understood.

Purpose of the Study:

To investigate the effects of intracerebroventricular visfatin administration on feed intake, water intake, and locomotion in chicks.
To explore the neural mechanisms underlying visfatin's effects on appetite.

Main Methods:

Intracerebroventricular injections of visfatin were administered to chicks.
Feed intake, water intake, and locomotion were measured.
c-Fos immunoreactivity in specific hypothalamic nuclei was assessed.

Main Results:

Visfatin administration significantly increased feed intake and pecking efficiency.
Locomotion was increased at a low dose of visfatin.
Visfatin altered c-Fos expression in the lateral, ventromedial, and dorsomedial hypothalamus.

Conclusions:

Intracerebroventricular visfatin exerts orexigenic effects in chicks.
Visfatin influences appetite regulation through hypothalamic pathways.
Further research is needed to elucidate the precise mechanisms.