2014
DOI: 10.1038/mp.2014.31
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Dietary triglycerides act on mesolimbic structures to regulate the rewarding and motivational aspects of feeding

Abstract: Circulating triglycerides (TG) normally increase after a meal but are altered in pathophysiological conditions such as obesity. Although TG metabolism in the brain remains poorly understood, several brain structures express enzymes that process TG-enriched particles, including mesolimbic structures. For this reason, and because consumption of high fat diet alters dopamine signaling, we tested the hypothesis that TG might directly target mesolimbic reward circuits to control reward-seeking behaviors. We found t… Show more

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Cited by 56 publications
(62 citation statements)
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“…Decreased locomotor activity and energy expenditure and increased parasympathetic nervous activity were demonstrated in this model [9]. Finally, we recently discovered that dietary TG acted on mesolimbic structures to regulate the rewarding and motivational aspects of feeding in mice, while targeted disruption of LPL specifically in the nucleus accumbens increased palatable food preference and food-seeking behaviour, again suggesting that circulating TG is sensed in the brain by an LPL-dependent mechanism [10]. Altogether, these data highlight a role for LPL in the CNS, especially in areas involved in the regulation of body weight.…”
Section: Introductionmentioning
confidence: 91%
See 1 more Smart Citation
“…Decreased locomotor activity and energy expenditure and increased parasympathetic nervous activity were demonstrated in this model [9]. Finally, we recently discovered that dietary TG acted on mesolimbic structures to regulate the rewarding and motivational aspects of feeding in mice, while targeted disruption of LPL specifically in the nucleus accumbens increased palatable food preference and food-seeking behaviour, again suggesting that circulating TG is sensed in the brain by an LPL-dependent mechanism [10]. Altogether, these data highlight a role for LPL in the CNS, especially in areas involved in the regulation of body weight.…”
Section: Introductionmentioning
confidence: 91%
“…Western blot Western blots were performed as described previously [10] with minor modifications. Briefly, samples were treated with lysis buffer in Tissue-Lyser.…”
Section: Methodsmentioning
confidence: 99%
“…It might constitute a metabolic signal for the brain. Indeed, delivery of minute quantities of TG to the brain of mice via the carotid artery rapidly abolished preference for palatable foods and reduced the motivation to engage in food-seeking behavior (22).…”
Section: B Obesity Also Affects the Orosensory Detection Of Lipidsmentioning
confidence: 99%
“…Dans ce cas, il faut donc envisager une hydrolyse locale de ces lipoprotéines qui fournirait alors des acides gras aux neurones sensés les détecter. Les découvertes récentes montrant que la LPL pouvait jouer ce rôle dans le SNC suggèrent fortement qu'une telle hydrolyse locale peut effectivement se produire, et que les lipoprotéines pourraient finalement être considérées comme des molécules de signalisation ou, au moins, comme des pourvoyeuses d'acides gras aux neurones spécialisés régulant la balance énergétique [9,10,12]. Ainsi, s'il est maintenant clairement établi qu'il existe des neurones sensibles aux acides gras dans le SNC (que l'on peut définir comme des neurones dont l'activité électrique est modulée [inhibée ou activée] en réponse à une variation de la concentration en acides gras), les méca-nismes moléculaires relayant leurs effets font encore débat.…”
Section: Des Neurones Sensibles Aux Acides Gras Dans Le Cerveauunclassified
“…En effet, en permettant l'hydrolyse des lipoprotéines riches en triglycérides, comme les VLDL (very low density lipoprotein) ou les chylomicrons, cette enzyme entraîne un apport local d'acides gras vers les neurones « sensibles » [11]. En dehors de l'hypothalamus, la LPL interviendrait aussi dans l'hippocampe [9] et dans le noyau accumbens, comme régulateur de la balance énergétique [12], ces structures jouant respectivement un rôle dans les processus d'apprentissage et de motivation. Ainsi, ces données mettent en lumière un effet éventuel de la détection des lipides dans des processus « non homéos-tatiques » de régulation de la prise alimentaire et de la balance énergétique [11].…”
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