A generals dream come true.

Inhibiting NCoR1 activates PPARalpha.  This affects ketogenesis.

hyperactivity in the mechanistic target of rapamycin complex 1 (mTORC1)
cellular pathway is linked to reduced ketone production, which is a
well-defined physiological trait of aging in mice; the mTORC1 pathway in
mammals affects an aging phenotype; the mTORC1 pathway, is known to
coordinate cell growth with nutrient availability and other growth
factors; when this pathway is inhibited, a variety of animals, including
worms, flies, and mice tend to live longer; one well-defined trait of
aging is a decrease in ketogenesis; during sleep or other times of low
carbohydrate intake, the liver converts fatty acids to ketones, which
are vital sources of energy during fasting, especially for the heart and
brain; as animals age, their ability to produce ketones as a response to
fasting declines; inducing mTORC1 hyperactivity in the livers of fasting
mice lead to a drop in ketone levels although most blood and liver
metabolite levels did not change significantly; PPARalpha is an
activator of liver ketogenesis, but stimulating PPAR-alpha failed to
raise ketone levels - a clear indication that that mTORC1 was thwarting
PPAR-alpha, making mTORC1 a master regulator of ketogenesis; it might be
one of many inputs for PPAR alpha but mTORC1 is sufficient and necessary
to suppress PPAR-alpha and ketogenesis; if mTORC1 activation is
responsible for lower ketone levels caused by aging, turning on mTORC1
in older mice should not affect their already low ketone levels;
comparing the ketone production of old and young mice during fasting
showed that while turning on the mTORC1 pathway during fasting reduced
ketone production in the young mice, the old mice maintained the same,
low ketone levels; when the mTORC1 pathway was turned off in very young
mice that were subsequently aged, these older mice did not experience
the decline in ketogenesis found in normal mice. Their ketogenesis
levels were similar to younger mice, confirming that continual
inhibition of the mTORC1 pathway prevented the aging-induced decline in
ketone production; suppressing mTORC1 might slow aging but rapamycin has
side effects; why is ketogenesis suppressed by aging and how does aging
activate mTORC1?
<http://www.sciencedaily.com/releases/2010/12/101222131125.htm>, [Shomit
Sengupta, Timothy R. Peterson, Mathieu Laplante, Stephanie Oh, and David
M. Sabatini. mTOR Complex 1 controls fasting-induced ketogenesis and its
modulation by aging. Nature, December 23, 2010 DOI:
10.1038/nature09584], abstract: The multi-component mechanistic target
of rapamycin complex 1 (mTORC1) kinase is the central node of a
mammalian pathway that coordinates cell growth with the availability of
nutrients, energy and growth factors. Progress has been made in the
identification of mTORC1 pathway components and in understanding their
functions in cells, but there is relatively little known about the role
of the pathway in vivo. Specifically, we have little knowledge regarding
the role mTOCR1 has in liver physiology. In fasted animals, the liver
performs numerous functions that maintain whole-body homeostasis,
including the production of ketone bodies for peripheral tissues to use
as energy sources. Here we show that mTORC1 controls ketogenesis in mice
in response to fasting. We find that liver-specific loss of TSC1
(tuberous sclerosis 1), an mTORC1 inhibitor, leads to a
fasting-resistant increase in liver size, and to a pronounced defect in
ketone body production and ketogenic gene expression on fasting. The
loss of raptor (regulatory associated protein of mTOR, complex 1) an
essential mTORC1 component, has the opposite effects. In addition, we
find that the inhibition of mTORC1 is required for the fasting-induced
activation of PPARalpha (peroxisome proliferator activated receptor
alpha), the master transcriptional activator of ketogenic genes, and
that suppression of NCoR1 (nuclear receptor co-repressor 1), a
co-repressor of PPARalpha, reactivates ketogenesis in cells and livers
with hyperactive mTORC1 signalling. Like livers with activated mTORC1,
livers from aged mice have a defect in ketogenesis, which correlates
with an increase in mTORC1 signalling. Moreover, we show that the
suppressive effects of mTORC1 activation and ageing on PPARalpha
activity and ketone production are not additive, and that mTORC1
inhibition is sufficient to prevent the ageing-induced defect in
ketogenesis. Thus, our findings reveal that mTORC1 is a key regulator of
PPARalpha function and hepatic ketogenesis and suggest a role for mTORC1
activity in promoting the ageing of the liver [PMID 21179166]