Leptin activates hypothalamic CART neurons projecting to the spinal cord.

Abstract:

:The adipocyte-derived hormone leptin decreases body weight in part by activating the sympathetic nervous system, resulting in increased thermogenesis and energy expenditure. We investigated hypothalamic pathways underlying leptin's effects on stimulating the sympathetic nervous system. We found that leptin activates neurons in the retrochiasmatic area (RCA) and lateral arcuate nucleus (Arc) that innervate the thoracic spinal cord and also contain cocaine- and amphetamine-regulated transcript (CART). We also found that most CART-containing neurons in the RCA and Arc of the hypothalamus also contain proopiomelanocortin (POMC) mRNA. The finding that leptin activates CART/POMC neurons innervating sympathetic preganglionic neurons in the thoracic spinal cord suggests that this pathway may contribute to the increased thermogenesis and energy expenditure and decreased body weight observed following leptin administration.

journal_name

Neuron

journal_title

Neuron

authors

Elias CF,Lee C,Kelly J,Aschkenasi C,Ahima RS,Couceyro PR,Kuhar MJ,Saper CB,Elmquist JK

doi

10.1016/s0896-6273(00)80656-x

subject

Has Abstract

pub_date

1998-12-01 00:00:00

pages

1375-85

issue

6

eissn

0896-6273

issn

1097-4199

pii

S0896-6273(00)80656-X

journal_volume

21

pub_type

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