Marie-Claude Bertière

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Two experimental situations induce hyperphagia in the rat: the cafeteria model and the tail-pinching model. In non-deprived rats which are offered for one hour a choice of 3 liquid cafeteria items in addition to ordinary chow and water, mild tail-pinching results in a preferential sucrose hyperphagia; naltrexone (2.5 mg/kg IP) suppresses this stress-induced(More)
We used discontinuous gradients of polyacrylamide gel to determine the high-density-lipoprotein (HDL) subfractions HDL2 and HDL3 of serum lipoproteins. Serum (40 microL) prestained with Sudan Black was electrophoresed in cylindrical tubes over successive layers of 3.5%, 6%, 13%, and 17.5% acrylamide gels in a Tris.glycine buffer (3-4 h, 300 V). Very-low-(More)
Two experiments were performed to explore 1) the sexual behavior of male obese cafeteria rats, 2) a possible role of endogenous opiates in the regulation of their sexual behavior. In obese cafeteria rats the proportion of ejaculators and the number of ejaculations per hour were significantly lower compared to controls. Naltrexone provoked an increase in the(More)
BACKGROUND Sarcopenia is increasingly recognized as a correlate of ageing and is associated with increased likelihood of adverse outcomes including falls, fractures, frailty and mortality. Several tools have been recommended to assess muscle mass, muscle strength and physical performance in clinical trials. Whilst these tools have proven to be accurate and(More)
A highly palatable diet (cafeteria diet) provokes an hyperphagia. The effects of Mu and Kappa opiate antagonists (Mu : Naltrexone 0.5 mg/Kg IP; Kappa Mr2266 0.5; 2.5; 10) and agonists (Mu Morphine 0.05; 0.1; 0.5; 2.5; Kappa Mr2033 0.5; 2.5) were studied on the nocturnal food intake of cafeteria rats and chow rats fed with monotonous food. At low doses Mu as(More)
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