Daniel Auchère

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BACKGROUND Lanthanum (La) carbonate has recently been proposed as an alternative, calcium- and aluminum-free phosphate binder for the treatment of hyperphosphatemia of chronic renal failure (CRF). However, the extent to which CRF enhances tissue La accumulation induced by oral La overload above that observed under conditions of normal renal function remains(More)
PURPOSE P-glycoprotein (P-gp) and cytochrome P450 (P450) affect drug disposition. Efavirenz (EFV) is an anti-HIV drug used in combination. Since most anti-HIV medications are substrate and modulators of P-gp and/or P450, we investigated the effects of EFV on intestinal P-gp and hepatic P450 function to predict drug interactions. METHODS (i) The effect of(More)
The present study was performed to determine the respective involvement of the cellular and paracellular routes in ileal Ca2+ transport. Two groups of rats were either fed a normal Ca2+ diet (1. 0%) or a Ca2+-deficient diet (0.02%) for 14 days. Ileal Ca2+ absorption was determined using both an in situ method of continuous luminal perfusion and an in vitro(More)
Photodynamic therapy (PDT) involves a non invasive treatment of small and superficial cancers using a photosensitive drug and light to kill tumoral cells. 5,10,15-meso-tri-(meta-O-beta-D-glucosyloxyphenyl)-20-phenylporphyrin [m-TPP(glu)3] is a new photosensitizer (PS) with more enhanced photocytotoxicity relative to(More)
BACKGROUND In chronic renal failure, the renal excretion of certain drugs is dramatically reduced. To determine whether other routes of drug elimination, such as secretion through the intestinal barrier by intestinal P-glycoprotein can be altered, we compared P-glycoprotein activity, P-glycoprotein protein content, and P-glycoprotein mRNA levels in(More)
1. Mefloquine is a chiral neurotoxic antimalarial agent showing stereoselective brain uptake in humans and rats. It is a substrate and an inhibitor of the efflux protein P-glycoprotein. 2. We investigated the stereoselective uptake and efflux of mefloquine in mice, and the consequences of the combination with an efflux protein inhibitor, elacridar(More)
BACKGROUND Previous work showed that the functional cardiac effect of dietary alpha-linolenic acid (ALA) in rats requires a long feeding period (6 months), although a docosahexaenoic (DHA) acid-supply affects cardiac adrenergic response after 2 months. However, the total cardiac membrane n-3 polyunsaturated fatty acid (PUFA) composition remained unchanged(More)
Poly(isobutylcyanoacrylate) nanocapsules have been shown to decrease the blood glucose level after oral administration to streptozotocin-induced diabetic fasted rats after 2 days [Diabetes 37 (1988) 246]. Yet, the absorption of insulin in the blood of rats has not been characterised. The aim of this work was to evaluate the biological activity of insulin(More)
BACKGROUND Lanthanum (La) carbonate is a new treatment for hyperphosphatemia. We tested the effects of oral La carbonate and aluminum hydroxide, respectively, on tissue accumulation and liver function in rats with chronic renal failure (CRF). METHODS Adult male non-CRF and CRF rats were randomly assigned to 3 groups receiving either standard diet (St.D),(More)
Inhibitors of P-glycoprotein (P-gp) (verapamil) or cytochrome P-450 (ketoconazole) may reduce IL2 production and T lymphocyte proliferation in vitro. We have examined the effects of chronic oral administration of these drugs and of the cytochrome P450 inductor, carbamazepine, on the hematological and immunological parameters of mice. We found no changes(More)