Research Topics
| Pierre Louis ToutainSummaryCountry: France Publications
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Publications
Veterinary medicines and competition animals: the question of medication versus doping controlPierre Louis Toutain
UMR181 Physiopathologie et Toxicologuie Experimentales INRA, ENVT, , 23 Chemin des Capelles, 31076, Toulouse cedex 03, France
Handb Exp Pharmacol 199:315-39. 2010..e. the large scale investigation of protein biomarkers) and metabolomic (i.e. the study of metabolite profiling in biological samples) techniques also deserve attention for establishing possible unique fingerprints of drug abuse...
Should licking behavior be considered in the bioavailability evaluation of transdermal products?P L Toutain
INRA, UMR1331, Toxalim, Toulouse, France
J Vet Pharmacol Ther 35:39-43. 2012....
Benazeprilat disposition and effect in dogs revisited with a pharmacokinetic/pharmacodynamic modeling approachP L Toutain
Ecole Nationale Veterinaire de Toulouse, et Institut National de la Recherche Agronomique, Unité Associée de Physiopathologie et Toxicologie Expérimentales, Toulouse, France
J Pharmacol Exp Ther 292:1087-93. 2000....
Integration and modelling of pharmacokinetic and pharmacodynamic data to optimize dosage regimens in veterinary medicineP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:467-77. 2004....
Bioavailability and its assessmentP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:455-66. 2004..The rate of drug absorption is also discussed with special emphasis on the possible difficulties encountered using C(max) and T(max) or curve fitting to evaluate the rate of drug absorption...
Volumes of distributionP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:441-53. 2004..Volumes of distribution should be determined early in drug development programmes and those having a large volume of distribution may be selected to obtain a long terminal half-life even for drugs having a relatively high clearance...
Plasma terminal half-lifeP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:427-39. 2004..The terminal half-life is especially relevant to multiple dosing regimens, because it controls the degree of drug accumulation, concentration fluctuations and the time taken to reach equilibrium...
Plasma clearanceP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:415-25. 2004....
AUC/MIC: a PK/PD index for antibiotics with a time dimension or simply a dimensionless scoring factor?Pierre Louis Toutain
UMR181 Physiopathologie et Toxicologie Expérimentales INRA, ENVT, 23 Chemin des Capelles, 31076 Toulouse cedex 03, France
J Antimicrob Chemother 60:1185-8. 2007..To accommodate the need for dose prediction during these novel therapeutic situations, we propose a general approach that is based on the targeted time interval over which some desired average concentration should be maintained...
Pharmacokinetics and pharmacokinetic/pharmacodynamic relationships for angiotensin-converting enzyme inhibitorsP L Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, Toulouse cedex 03, France
J Vet Pharmacol Ther 27:515-25. 2004..ACE inhibition is the surrogate endpoint generally selected for establishing a PK/PD relationship and for simulating dosage regimen scenarios in order to decide on the appropriate dosage regimen for ACEIs...
The pharmacokinetic-pharmacodynamic approach to a rational dosage regimen for antibioticsP L Toutain
UMR INRA de Physiopathologie et Toxicologie Expérimentales, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, 31076 Toulouse cedex 03, France
Res Vet Sci 73:105-14. 2002..Using the latter drugs, high concentrations achieved early during therapy are desirable to prevent the development of resistance. A C(max)/MIC ratio greater than 10-12 seems to be an appropriate target for aminoglycosides...
Species differences in pharmacokinetics and pharmacodynamicsPierre Louis Toutain
, , 23 Chemin des Capelles, BP 87 614, 31076, Toulouse cedex 03, France
Handb Exp Pharmacol 199:19-48. 2010..Instead, each drug must be investigated on a species-by-species basis to guarantee its effective and safe use, thus ensuring the well-being of animals and safeguarding of the environment and human consumption of animal products...
New insights on effect of kidney insufficiency on disposition of angiotensin-converting enzyme inhibitors: case of enalapril and benazepril in dogsP L Toutain
Ecole Nationale Veterinaire de Toulouse, et Institut National de la Recherche Agronomique, Unité Associée de Physiopathologie et Toxicologie Expérimentales, Toulouse, France
J Pharmacol Exp Ther 292:1094-103. 2000....
Pharmacokinetic/pharmacodynamic integration in drug development and dosage-regimen optimization for veterinary medicinePierre Louis Toutain
Ecole Nationale Veterinaire de Toulouse, UMR 181 INRA de Physiopathologie et Toxicologie Experimentales, Toulouse, France
AAPS PharmSci 4:E38. 2002..The limits of PK/PD approaches include the development of appropriate models, the validity of surrogate endpoints, and the acceptance of these models in a regulatory environment...
Pharmacokinetic profile and in vitro selective cyclooxygenase-2 inhibition by nimesulide in the dogP L Toutain
Unité Associée INRA de Physiopathologie et Toxicologie Expérimentales, Ecole Nationale Veterinaire de Toulouse, Toulouse, France
J Vet Pharmacol Ther 24:35-42. 2001..86 microg/mL) giving a nimesulide COX-1/COX-2 ratio of 12.99 +/- 3.41. It was concluded that at the currently recommended dosage regimen (5 mg/kg), the plasma concentration totally inhibits COX-2 and partly inhibits COX-1 isoenzyme...
A pharmacokinetic/pharmacodynamic approach vs. a dose titration for the determination of a dosage regimen: the case of nimesulide, a Cox-2 selective nonsteroidal anti-inflammatory drug in the dogP L Toutain
Unité Associée INRA de Physiopathologie et Toxicologie Expérimentales, Ecole Nationale Veterinaire, Toulouse, France
J Vet Pharmacol Ther 24:43-55. 2001..It was concluded from the comparison of in vivo and in vitro IC50, that nimesulide is a potent NSAID for which some Cox-1 inhibition is required to obtain clinically relevant efficacy...
A pharmacokinetic model to document the actual disposition of topical ivermectin in cattleCéline M Laffont
UMR 181 de Physiopathologie et Toxicologie Expérimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, 31076 Toulouse cedex 03, France
Vet Res 34:445-60. 2003..More importantly, the simulations revealed that non-treated cattle could get easily contaminated by allo-licking, raising the public health problem of unexpected drug residues in edible tissues...
Is the mechanisms of fipronil-induced thyroid disruption specific of the rat: Re-evaluation of fipronil thyroid toxicity in sheep?Julien Leghait
UMR181 Physiopathologie et Toxicologie Expérimentales INRA, ENVT, 31076 Toulouse Cedex 3, France
Toxicol Lett 194:51-7. 2010....
Pharmacokinetic and pharmacodynamic parameters of ramipril and ramiprilat in healthy dogs and dogs with reduced glomerular filtration rateHerve P Lefebvre
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, National Veterinary School of Toulouse, France
J Vet Intern Med 20:499-507. 2006..No adjustment of the recommended PO dosage of ramipril is needed in dogs with moderate renal impairment...
Intraocular pharmacokinetics of intravenously administered marbofloxacin in rabbits with experimentally induced acute endophthalmitisAlain Regnier
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire, Toulouse Cedex 3, France
Am J Vet Res 69:410-5. 2008..To compare penetration of IV administered marbofloxacin in intraocular fluids of healthy and inflamed eyes in rabbits with endotoxin-induced endophthalmitis...
Emergence of resistant Klebsiella pneumoniae in the intestinal tract during successful treatment of Klebsiella pneumoniae lung infection in ratsAnne Sylvie Kesteman
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France
Antimicrob Agents Chemother 54:2960-4. 2010..Bacterial cure without resistance selection at the infection site with fluoroquinolone treatment can be linked to colonization of the digestive tract by targeted pulmonary bacteria, followed by the emergence of resistance...
A possible pharmacological explanation for quinacrine failure to treat prion diseases: pharmacokinetic investigations in a ovine model of scrapieVéronique Gayrard
UMR 181 de Physiopathologie et Toxicologie Expérimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87614, 31076 Toulouse Cedex 3, France
Br J Pharmacol 144:386-93. 2005..It can then be established if these in vitro antiprion concentrations are achievable in vivo...
Intestinal secretion is a major route for parent ivermectin elimination in the ratCéline M Laffont
Unite Mixte de Recherche, Institut National de La Recherche Agronomique de Physiopathologie et Toxicologie Expérimentales, Ecole Nationale Veterinaire de Toulouse, France
Drug Metab Dispos 30:626-30. 2002..This is discussed in terms of therapeutic efficacy against intestinal parasites in humans and animals and of ecotoxicity resulting from the contamination of livestock dung with parent drug...
Blood clearance of the prion protein introduced by intravenous route in sheep is influenced by host genetic and physiopathologic factorsVéronique Gayrard
Ecole Nationale Veterinaire de Toulouse, Toulouse, France
Transfusion 48:609-19. 2008..These concentrations are controlled by the blood clearance of PrP, which has never been evaluated...
Competitive binding to plasma thyroid hormone transport proteins and thyroid disruption by phenylbutazone used as a probeVéronique Gayrard
INRA, UMR1331 Toxalim, F 31027 Toulouse, France
Gen Comp Endocrinol 174:225-31. 2011....
Influence of inoculum size and marbofloxacin plasma exposure on the amplification of resistant subpopulations of Klebsiella pneumoniae in a rat lung infection modelAnne Sylvie Kesteman
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87 614, 31 076 Toulouse Cedex 3, France
Antimicrob Agents Chemother 53:4740-8. 2009..This ratio is valid only if plasma concentrations achieve the MPC...
Endectocide exchanges between grazing cattle after pour-on administration of doramectin, ivermectin and moxidectinAlain Bousquet-Melou
UMR 181 de Physiopathologie et Toxicologie Expérimentales INRA ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, B P 87614, 31076 Toulouse cedex 03, France
Int J Parasitol 34:1299-307. 2004..Moreover, scientific and regulatory aspects of clinical and bioequivalence trials for topical drug administration in cattle should be explored...
Influence of inoculum size on the selection of resistant mutants of Escherichia coli in relation to mutant prevention concentrations of marbofloxacinAude Ferran
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France
Antimicrob Agents Chemother 51:4163-6. 2007....
The adrenocorticotropin stimulation test: contribution of a physiologically based model developed in horse for its interpretation in different pathophysiological situations encountered in manAlain Bousquet-Melou
Unité Mixte de Recherche 181 de Physiopathologie et Toxicologie Expérimentales, Institut National de la Recherche Agronomique et Ecole Nationale Vétérinaire de Toulouse, Ecole Nationale Veterinaire de Toulouse, Toulouse, France
Endocrinology 147:4281-91. 2006..Our model was able to reproduce and simply explain many adrenal gland responses that are dimmed by the different nonlinearities of the system...
Maternal and fetal exposure to bisphenol a is associated with alterations of thyroid function in pregnant ewes and their newborn lambsCatherine Viguié
Institut National de la Recherche Agronomique Institut National Polytechnique Université Paul Sabatire, Ecole Nationale Veterinaire de Toulouse, Laboratoire de Physiologie, 23 Chemin des Capelles, BP 87614, F 31076 Toulouse Cedex 3, France
Endocrinology 154:521-8. 2013..If such an effect were to be confirmed for a more relevant exposure scheme to BPA, this would constitute a major issue for BPA risk assessment...
Fipronil-induced disruption of thyroid function in rats is mediated by increased total and free thyroxine clearances concomitantly to increased activity of hepatic enzymesJulien Leghait
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, 23 Chemin des Capelles, BP 87614, 31076 Toulouse Cedex 3, France
Toxicology 255:38-44. 2009..Plasma concentrations of fipronil sulfone were at least 20-fold higher than those of fipronil. This highlights the need to further investigate the contribution of fipronil sulfone to the fipronil-induced thyroid disruption...
Estrogenicity of bisphenol a: a concentration-effect relationship on luteinizing hormone secretion in a sensitive model of prepubertal lambSéverine H Collet
UMR 181 Physiopathologie et Toxicologie Expérimentales INRA, Ecole Nationale Veterinaire de Toulouse, Toulouse Cedex 3, France
Toxicol Sci 117:54-62. 2010....
Impact of early versus later fluoroquinolone treatment on the clinical; microbiological and resistance outcomes in a mouse-lung model of Pasteurella multocida infectionAude A Ferran
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France
Vet Microbiol 148:292-7. 2011....
Licking behaviour induces partial anthelmintic efficacy of ivermectin pour-on formulation in untreated cattleAlain Bousquet-Melou
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, 31076 Toulouse, France
Int J Parasitol 41:563-9. 2011..This raises several issues such as the design of comparative clinical trials and the occurrence of partial efficacy which is considered a risk factor for the development of anthelmintic resistance...
Acute changes in muscle blood flow and concomitant muscle damage after an intramuscular administrationPierre Jean Ferré
UMR 181 Physiopathologie et Toxicologie Experimentales INRA ENVT, Ecole Nationale Veterinaire, BP 87614, 31076 Toulouse cedex 03, France
Pharm Res 22:405-12. 2005..The intramuscular route (IM) is widely used but commonly induces injection site muscle damage. This study investigates the hemodynamic changes in an acute lesion induced by the IM administration of propylene glycol (PG) in rabbits...
Clinical, electroretinographic and histomorphometric evaluation of the retina in sheep with natural scrapieAlain Regnier
UMR 181 Physiopathologie et Toxicologie Experimentales, INRA, Ecole Nationale Veterinaire, 23 Chemin des Capelles, B P 87614, 31076 Toulouse Cedex 3, France
BMC Vet Res 7:25. 2011..Scrapie status was determined by examination of brain tissue..
Pharmacokinetic/pharmacodynamic analysis of the influence of inoculum size on the selection of resistance in Escherichia coli by a quinolone in a mouse thigh bacterial infection modelAude A Ferran
UMR181 Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, Ecole Nationale Veterinaire de Toulouse, 23 Chemin des Capelles, BP 87 614, 31076 Toulouse Cedex 3, France
Antimicrob Agents Chemother 53:3384-90. 2009..The relevance of these results merits further investigation to test different strategies of antibiotic therapy depending on the expected bacterial burden at the infectious site...
Longitudinal analysis of gene expression in porcine skeletal muscle after post-injection local injuryPierre J Ferré
UMR181 de Physiopathologie et Toxicologie Expérimentales, INRA, ENVT, National Veterinary School, 23 Chemin des Capelles, BP 87614, Toulouse cedex 03, 31076, France
Pharm Res 24:1480-9. 2007..The purpose of this study is to describe the time course of gene expression in a skeletal muscle local injury induced by an intramuscular (IM) injection, and to compare the dynamics of gene expression with pathological events...
Optimizing ciprofloxacin dosing in intensive care unit patients through the use of population pharmacokinetic-pharmacodynamic analysis and Monte Carlo simulationsDalia Khachman
INRA, UMR 1331, Toxalim, F 31027 Toulouse, France
J Antimicrob Chemother 66:1798-809. 2011..To explore different ciprofloxacin dosage regimens for the treatment of intensive care unit (ICU) patients with respect to clinical outcome and the development of bacterial resistance for the major Gram-negative pathogens...
Increased GH secretion in scrapie, a prion-associated neurodegenerative disease, is not due to suppressed IGF-1 negative feedbackCatherine Viguié
UMR 181, INRA, ENVT 23 Chemin des Capelles, F 31076 Toulouse Cedex 3, France
Domest Anim Endocrinol 36:127-37. 2009..Further investigations are required to determine if other IGF-1 effects and more particularly neuroprotective mechanisms are altered in prion-associated neurodegenerative diseases...
Paw inflammation model in dogs for preclinical pharmacokinetic/pharmacodynamic investigations of nonsteroidal anti-inflammatory drugsE C Jeunesse
Toxalim, Institut National de la Recherche Agronomique, Toulouse, France
J Pharmacol Exp Ther 338:548-58. 2011..These in vivo IC(50) values require approximately 80 (antipyretic effect) to 90% (all other effects) cyclooxygenase-2 inhibition as calculated ex vivo whole-blood assay data...
Population pharmacokinetics of marbofloxacin in aqueous humor after intravenous administration in dogsAlain Regnier
, , 31076 Toulouse, France
Am J Vet Res 64:889-93. 2003..CONCLUSIONS AND CLINICAL RELEVANCE: Marbofloxacin administered IV can penetrate the aqueous humor of canine eyes and may be suitable for prophylaxis or treatment of certain anterior chamber infections...
A comparison of antimicrobial usage in human and veterinary medicine in France from 1999 to 2005Gérard Moulin
AFSSA ANMV French Agency for Veterinary Medicinal Products, Fougeres, France
J Antimicrob Chemother 62:617-25. 2008..The antimicrobials allowed and amounts sold in veterinary and human medicine in France were compared to see if the same antimicrobial drugs are used in veterinary and human medicine, and to the same extent...
Plasma exogenous creatinine clearance test in dogs: comparison with other methods and proposed limited sampling strategyA D J Watson
Veterinary Medicine, The University of Sydney, NSW, Australia
J Vet Intern Med 16:22-33. 2002..5% with 4 blood samples. These results suggest that determination of plasma creatinine clearance by a noncompartmental approach offers a reliable, inexpensive, rapid, and convenient means of estimating GFR in routine practice...
Contribution of lymphatic transport to the systemic exposure of orally administered moxidectin in conscious lymph duct-cannulated dogsAnne Lespine
INRA UR66, Laboratoire de Pharmacologie Toxicologie, BP 3, 31931 Toulouse Cedex 9, France
Eur J Pharm Sci 27:37-43. 2006..The lymphatic transport of moxidectin offers potential strategies based on lipid formulations to improve the bioavailability of MLs when administered orally...
Pharmacokinetics of meloxicam in plasma and urine of horsesPierre-Louis Toutain
, INRA/ENVT, , 23 Chemin des Capelles, 31076 Toulouse, France
Am J Vet Res 65:1542-7. 2004....
Pharmacokinetic-pharmacodynamic relationships and dose response to meloxicam in horses with induced arthritis in the right carpal jointPierre-Louis Toutain
UMR 181 Physiopathologie et Toxicologie Experimentales, INRA/ENVT, , 23 Chemin des Capelles, 31076 Toulouse, France
Am J Vet Res 65:1533-41. 2004..CONCLUSIONS AND CLINICAL RELEVANCE: Results of this study suggest that meloxicam is a potent anti-inflammatory drug in horses. A dosage of 0.6 mg/kg/d would be appropriate for use in a clinical study...
Pharmacokinetic/pharmacodynamic modelling of NSAIDs in a model of reversible inflammation in the catJerome M Giraudel
, , France
Br J Pharmacol 146:642-53. 2005..5-15 mg, that is, between 0.1 and 0.3 mg kg(-1)). 6 These findings indicate the potential value of the cat as a laboratory model, and of a PK/PD modelling approach in assisting NSAID development programs in animals and humans...
Influence of feeding and analytical method on the bioequivalence of a racemic drug undergoing enantioselective enterohepatic recyclingNathalie M-H Priymenko
, , 23 Chemin des Capelles, 31076 Toulouse Cedex 3, France
J Pharm Sci 93:590-600. 2004....
