Localization and effect of ectopic expression of CPT1c in CNS feeding centers.

Abstract:

:Hypothalamic neurons monitor peripheral energy status and produce signals to adjust food intake and energy expenditure to maintain homeostasis. However, the molecular mechanisms by which these signals are generated remain unclear. Fluctuations in the level of hypothalamic malonyl-CoA are known to serve as an intermediary in regulating energy homeostasis and it has been proposed that the brain-specific carnitine palmitoyltransferase-1c (CPT1c) serves as a target of malonyl-CoA in the central nervous system (CNS). Here, we report that CPT1c is widely expressed in neurons throughout the CNS including the hypothalamus, hippocampus, cortex, and amygdala. CPT1c is enriched in neural feeding centers of the hypothalamus with mitochondrial localization as an outer integral membrane protein. Ectopic over-expression of CPT1c by stereotactic hypothalamic injection of a CPT1c adenoviral vector is sufficient to protect mice from body weight gain when fed a high-fat diet. These findings show that CPT1c is appropriately localized in regions and cell types to regulate energy homeostasis and that its over-expression in the hypothalamus is sufficient to protect mice from adverse weight gain caused by high-fat intake.

authors

Dai Y,Wolfgang MJ,Cha SH,Lane MD

doi

10.1016/j.bbrc.2007.05.161

subject

Has Abstract

pub_date

2007-08-03 00:00:00

pages

469-74

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(07)01080-7

journal_volume

359

pub_type

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