Work

An orexinergic projection from perifornical hypothalamus to raphe pallidus increases rat brown adipose tissue thermogenesis

Year: 2012

Type: article

Abstract: Non-shivering thermogenesis in brown adipose tissue (BAT) plays an important role in thermoregulatory cold-defense and, through its metabolic consumption of energy reserves to produce heat, can affect the long-term regulation of adiposity. An orexinergic pathway from the perifornical lateral hypothalamus (PeF/LH) to the rostral raphe pallidus (rRPa) has been demonstrated to increase the gain of the excitatory drives to medullary sympathetic premotor neurons controlling BAT sympathetic outflow and BAT thermogenesis. With this background, we consider neural mechanisms that could underlie orexin's modulation of the excitability of BAT sympathetic premotor neurons in rRPa and the potential role of altered BAT thermogenesis in pathological conditions associated with the absence of the central orexin system. Overall, these new data enhance our understanding of the role of central orexin in regulating body temperature and energy homeostasis and provide further insight into the neurochemical regulation of BAT thermogenesis and metabolism.

Source: Adipocyte

DOI: 10.4161/adip.19736

Authors: Shaun F. Morrison, Christopher J. Madden, Domenico Tupone

Institution: Oregon Health & Science University

Language: English

Topic: Adipose Tissue and Metabolism

Subfield: Physiology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $2,557