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Ede T, Woodroffe RE, von Keyserlingk MAG, Weary DM. Calves peak-end memory of pain. Sci Rep 2023; 13:5679. [PMID: 37029265 PMCID: PMC10082038 DOI: 10.1038/s41598-023-32756-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 04/01/2023] [Indexed: 04/09/2023] Open
Abstract
In humans, the 'peak-end' rule states that recollection of an experience is most often influenced by the peak (the most intense moment) and end of the experience. We investigated whether calves followed the peak-end rule in their memory of a painful procedure: disbudding. As proxies for retrospective and 'real-time' reports of pain, we used conditioned place aversion, and reflex pain behaviours. In two separate trials, calves were subjected to two disbudding conditioning sessions (one horn per treatment), acting as their own control. In the first trial, calves (n = 22) were disbudded and remained in a pen for 4 h, and disbudded and left in another pen for 4 h with an additional 2 h following an analgesic treatment. In the second trial, calves (n = 22) were disbudded and left in pens for 6 h during both treatments, receiving the analgesic at either 2 h or 4 h after disbudding. Calves were then tested for place aversion. For both trials we did not observe a preference for the pens where calves received analgesic treatment towards the end of the session. We did not find an association between aversion and the sum, peak or end of pain behaviours. Results are not consistent with a peak-end effect in calves' memory of pain.
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Affiliation(s)
- Thomas Ede
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, BC, V6T 1Z6, Canada
- Department of Clinical Studies, Swine Teaching and Research Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA, USA
| | - Raphaela E Woodroffe
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, BC, V6T 1Z6, Canada
| | - Marina A G von Keyserlingk
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, BC, V6T 1Z6, Canada
| | - Daniel M Weary
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, BC, V6T 1Z6, Canada.
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Nixon E, Chittenden JT, Baynes RE, Messenger KM. Pharmacokinetic/pharmacodynamic modeling of ketoprofen and flunixin at piglet castration and tail-docking. J Vet Pharmacol Ther 2022; 45:450-466. [PMID: 35833463 PMCID: PMC9541024 DOI: 10.1111/jvp.13083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 05/17/2022] [Accepted: 06/10/2022] [Indexed: 11/30/2022]
Abstract
This study performed population‐pharmacokinetic/pharmacodynamic (pop‐PK/PD) modeling of ketoprofen and flunixin in piglets undergoing routine castration and tail‐docking, utilizing previously published data. Six‐day‐old male piglets (8/group) received either ketoprofen (3.0 mg/kg) or flunixin (2.2 mg/kg) intramuscularly. Two hours post‐dose, piglets were castrated and tail docked. Inhibitory indirect response models were developed utilizing plasma cortisol or interstitial fluid prostaglandin E2 (PGE2) concentration data. Plasma IC50 for ketoprofen utilizing PGE2 as a biomarker was 1.2 μg/ml, and ED50 for was 5.83 mg/kg. The ED50 calculated using cortisol was 4.36 mg/kg; however, the IC50 was high, at 2.56 μg/ml. A large degree of inter‐individual variability (124.08%) was also associated with the cortisol IC50 following ketoprofen administration. IC50 for flunixin utilizing cortisol as a biomarker was 0.06 μg/ml, and ED50 was 0.51 mg/kg. The results show that the currently marketed doses of ketoprofen (3.0 mg/kg) and flunixin (2.2 mg/kg) correspond to drug responses of 33.97% (ketoprofen‐PGE2), 40.75% (ketoprofen‐cortisol), and 81.05% (flunixin‐cortisol) of the maximal possible responses. Given this information, flunixin may be the best NSAID to use in mitigating castration and tail‐docking pain at the current label dose.
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Affiliation(s)
- Emma Nixon
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | | | - Ronald E Baynes
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Kristen M Messenger
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
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De Koster J, Boucher JF, Tena JK, Gehring R, Stegemann MR. Co-formulation of ketoprofen with tulathromycin alters pharmacokinetic and pharmacodynamic profile of ketoprofen in cattle. J Vet Pharmacol Ther 2021; 45:69-82. [PMID: 34387365 DOI: 10.1111/jvp.12999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/25/2021] [Indexed: 12/01/2022]
Abstract
The current studies aimed to evaluate the pharmacokinetic (PK) and pharmacodynamic (PD) profile and to establish a PK-PD model for ketoprofen in a new fixed combination product containing tulathromycin (2.5 mg/kg) and ketoprofen (3 mg/kg) to treat bovine respiratory disease associated with pyrexia in cattle. Firstly, the effect of different ketoprofen doses as mono-substance (1, 3, and 6 mg/kg subcutaneous) on lipopolysaccharide-induced fever was evaluated which indicated that rectal temperature reduction lasted longer in the calves receiving 3 and 6 mg/kg ketoprofen. Secondly, the PK profile of the combination product was compared with mono-substance products (3 mg/kg subcutaneous and intramuscular). The PK profile of ketoprofen in the combination product was characterized by longer t1/2 , lower Cmax and increased AUC in comparison with mono-substance products. Due to prolonged ketoprofen exposure in the combination product, the pyrexia reducing effect of the combination product lasted longer in a second lipopolysaccharide challenge study in comparison with mono-substance products. Finally, a PK-PD model for the anti-pyretic effect of ketoprofen was developed based on the data from the different studies. The PK-PD model eliminated the need for additional animal experiments and indicated that a 3 mg/kg ketoprofen dose in the combination product provided optimal efficacy.
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Affiliation(s)
- Jenne De Koster
- Zoetis, Veterinary Medicine Research and Development, Zaventem, Belgium
| | - Joseph F Boucher
- Zoetis, Veterinary Medicine Research and Development, Kalamazoo, MI, USA
| | - Jezaniah-Kira Tena
- Zoetis, Veterinary Medicine Research and Development, Kalamazoo, MI, USA
| | - Ronette Gehring
- Division of Veterinary and Comparative Pharmacology, Faculty of Veterinary Medicine, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
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Mechery S, Narayanan Nair S, Divya TM, Promod K, Paramba SIN, Ravindran R, Juliet S. Influence of Pyrexia on Pharmacokinetics of Azithromycin and Its Interaction With Tolfenamic Acid in Goats. Front Vet Sci 2021; 8:675603. [PMID: 34179168 PMCID: PMC8222727 DOI: 10.3389/fvets.2021.675603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/27/2021] [Indexed: 11/13/2022] Open
Abstract
Azithromycin is a macrolide antimicrobial agent of the azalide group with a broad spectrum of activity against gram-negative and gram-positive bacterial organisms. Tolfenamic acid is a non-steroidal anti-inflammatory drug of the fenamate group, which is used extensively in humans and animals due to its anti-inflammatory, analgesic, and antipyretic properties. There is dearth of literature on any type of drug interaction between azithromycin and tolfenamic acid in any species, including human beings and alteration of its pharmacokinetics by fever. Therefore, the objective of this study was to investigate the alteration of disposition kinetics of azithromycin alone and in the presence of tolfenamic acid in Malabari goats by fever, following an intravenous administration at a dose rate of 20 mg/kg body weight. Blood samples collected from both afebrile and febrile goats at predetermined time intervals after the administration of azithromycin alone and then in combination with tolfenamic acid (2 mg/kg, intravenously), respectively, were analyzed using high-performance liquid chromatography. Non-compartmental analysis was used to determine the peak blood concentration (C max), time-to-peak plasma concentration (T max), half-life (t 1/2λz ), area under the curve (AUC 0-t, AUC 0-inf), area under the first moment curve (AUMC 0-inf), mean residence time (MRT0-inf), apparent volume of distribution at steady state (V ss), and the total body clearance of drug from the blood (Cl). In febrile animals, significant differences were noted in the values of C max, Cl, and V ss. Thus, azithromycin disappears into an additional compartment in febrile goats, which may be due to its extended cellular penetration into the inflammatory cells, resulting in anti-inflammatory activity. Tolfenamic acid significantly altered the pharmacokinetics of azithromycin in both normal and febrile animals. Tolfenamic acid, being a better anti-inflammatory agent, suppresses the inflammatory mediators, reducing the possibility of increased utilization of azithromycin in febrile condition.
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Affiliation(s)
- Sini Mechery
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Suresh Narayanan Nair
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Thirumangalath Meethal Divya
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Kanjirakuzhiyil Promod
- Department of Animal Reproduction Obstetrics and Gynaecology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Sakkariya Ibrahim Nalukudy Paramba
- Department of Livestock Production Management, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Reghu Ravindran
- Department of Veterinary Parasitology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
| | - Sanis Juliet
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Wayanad, India
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Alsaaod M, Fadul M, Deiss R, Bucher E, Rehage J, Guccione J, Steiner A. Use of validated objective methods of locomotion characteristics and weight distribution for evaluating the efficacy of ketoprofen for alleviating pain in cows with limb pathologies. PLoS One 2019; 14:e0218546. [PMID: 31211805 PMCID: PMC6581267 DOI: 10.1371/journal.pone.0218546] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 06/04/2019] [Indexed: 11/19/2022] Open
Abstract
In veterinary practice pain alleviation plays a part in managing lameness. The aim of this randomized and placebo-controlled clinical study was to evaluate the effect of a single administration of ketoprofen on locomotion characteristics and weight distribution in cattle with foot (located up to and including the fetlock; n = 31) and (proximal to the fetlock; n = 10) pathologies. Cattle were randomly allocated to either the ketoprofen (group K; intravenous 3 mg/kg of body weight; n = 21) or an equivalent volume of isotonic sterile saline solution (group P; n = 20). Two accelerometers (400 Hz; kinematic outcome = stance phase duration; kinetic outcome = foot load and toe-off), a 4-scale weighing platform (weight distribution and SD of the weight) and a subjective locomotion score were measured before (baseline) and after 1 h and 18 h of treatment. All variables were expressed as differences across contralateral limbs, and the measurements at 1 h and 18 h were compared to the baseline. A repeated measures ANOVA was used to determine the differences between groups K and P. A logistic regression model with a binary outcome (0 = no improvement and 1 = improvement of the differences across the contralateral limbs over time) was calculated. Mean (± SD) of locomotion scores at baseline were not significantly different (P = 0.102) in group K (3.10 ± 0.80) as compared to group P (3.48 ± 0.64). Cattle of group K showed significantly lower differences across contralateral limbs at 1 h as compared to group P for the relative stance phase and the weight distribution. Only the treatment (P versus K) remained a significant factor in the model for relative stance phase (odds ratio (OR) = 6.5; 95% CI = 1.38–30.68) and weight distribution (OR = 6.36; 95% CI = 1.30–31.07). The effects of ketoprofen were evident in improving the differences across contralateral limbs—both for stance phase during walking and weight bearing during standing—after 1 h but not after 18 h of administration.
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Affiliation(s)
- Maher Alsaaod
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
- * E-mail:
| | - Mahmoud Fadul
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
- Department of Surgery and Anaesthesia, Faculty of Veterinary Medicine, University of Khartoum, Khartoum North, Khartoum, Sudan
| | - Ramona Deiss
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Esther Bucher
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Juergen Rehage
- Department of Veterinary Medicine and Animal Productions, University of Napoli Federico II, Napoli, Italy
| | - Jacopo Guccione
- Clinic for Cattle, University of Veterinary Medicine, Hannover, Germany
| | - Adrian Steiner
- Clinic for Ruminants, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
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Cabré F, Fernández MF, Calvo L, Ferrer X, García ML, Mauleón D. Analgesic, Antiinflammatory, and Antipyretic Effects of S(+)-Ketoprofen In Vivo. J Clin Pharmacol 2017; 38:3S-10S. [DOI: 10.1002/jcph.1998.38.s1.3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Marini D, Pippia J, Colditz IG, Hinch G, Petherick JC, Lee C. Randomised trial of the bioavailability and efficacy of orally administered flunixin, carprofen and ketoprofen in a pain model in sheep. Aust Vet J 2015. [PMID: 26220318 DOI: 10.1111/avj.12351] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To determine the efficacy and bioavailability of non-steroidal anti-inflammatory drugs (NSAIDs) when administered orally to sheep. DESIGN Randomised experimental design with four treatment groups: three NSAID groups and one control group (n = 10/group). The study animals were 40 18-month-old Merino ewes with an average weight of 31.4 ± 0.5 kg. METHODS Treatment was given orally at 24 h intervals for 6 days at dose rates expected to achieve therapeutic levels in sheep: carprofen (8.0 mg/kg), ketoprofen (8.0 mg/kg) and flunixin (4.0 mg/kg). Oil of turpentine (0.1 mL) was injected into a forelimb of each sheep to induce inflammation and pain; responses (force plate pressure, skin temperature, limb circumference, haematology and plasma cortisol) were measured at 0, 3, 6, 9, 12, 24, 36, 48, 72 and 96 h post-injection. NSAID concentrations were determined by ultra-high-pressure liquid chromatography. RESULTS The NSAIDs were detectable in ovine plasma 2 h after oral administration, with average concentrations of 4.5-8.4 µg/mL for ketoprofen, 2.6-4.1 µg/mL for flunixin and 30-80 µg/mL for carprofen. NSAID concentrations dropped 24 h after administration. Pain response to an oil of turpentine injection was assessed using the measures applied but no effect of the NSAIDs was observed. Although this pain model has been previously validated, the responses observed in this study differed from those in the previous study. CONCLUSIONS AND CLINICAL RELEVANCE The three NSAIDs reached inferred therapeutic concentrations in blood at 2 h after oral administration. The oil of turpentine lameness model may need further validation.
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Affiliation(s)
- D Marini
- CSIRO, FD McMaster Laboratory, New England Highway, Armidale, New South Wales, Australia. .,School of Environmental and Rural Sciences, The University of New England, Armidale, NSW, Australia.
| | - J Pippia
- PIA PHARMA, Gladesville, NSW, Australia
| | - I G Colditz
- CSIRO, FD McMaster Laboratory, New England Highway, Armidale, New South Wales, Australia
| | - G Hinch
- School of Environmental and Rural Sciences, The University of New England, Armidale, NSW, Australia
| | - J C Petherick
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland, Australia
| | - C Lee
- CSIRO, FD McMaster Laboratory, New England Highway, Armidale, New South Wales, Australia
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Plessers E, Watteyn A, Wyns H, Pardon B, De Baere S, De Backer P, Croubels S. Enantioselective pharmacokinetics of ketoprofen in calves after intramuscular administration of a racemic mixture. J Vet Pharmacol Ther 2014; 38:410-3. [DOI: 10.1111/jvp.12186] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 10/28/2014] [Indexed: 11/28/2022]
Affiliation(s)
- E. Plessers
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - A. Watteyn
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - H. Wyns
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - B. Pardon
- Department of Large Animal Internal Medicine; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - S. De Baere
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - P. De Backer
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - S. Croubels
- Department of Pharmacology, Toxicology and Biochemistry; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
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Moya D, González LA, Janzen E, Caulkett NA, Fireheller E, Schwartzkopf-Genswein KS. Effects of castration method and frequency of intramuscular injections of ketoprofen on behavioral and physiological indicators of pain in beef cattle1. J Anim Sci 2014; 92:1686-97. [DOI: 10.2527/jas.2013-7298] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D. Moya
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - L. A. González
- CSIRO Animal, Food and Health Sciences, Australian Tropical Sciences and Innovation Precinct, Townsville, Australia
| | - E. Janzen
- University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | | | - E. Fireheller
- University of Calgary, Calgary, Alberta T2N 4N1, Canada
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Pelligand L, King JN, Hormazabal V, Toutain PL, Elliott J, Lees P. Differential pharmacokinetics and pharmacokinetic/pharmacodynamic modelling of robenacoxib and ketoprofen in a feline model of inflammation. J Vet Pharmacol Ther 2014; 37:354-66. [DOI: 10.1111/jvp.12107] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 01/02/2014] [Indexed: 11/29/2022]
Affiliation(s)
- L. Pelligand
- Department of Comparative and Basic Sciences; Royal Veterinary College; Hatfield UK
| | - J. N. King
- Clinical Development; Novartis Animal Health Inc.; Basel Switzerland
| | - V. Hormazabal
- Department of Food Safety and Infection Biology; The Norwegian School of Veterinary Science; Oslo Norway
| | - P. L. Toutain
- UMR 1331 Toxalim INRA/INP/UPS; Ecole Nationale Vétérinaire de Toulouse; Toulouse France
| | - J. Elliott
- Department of Comparative and Basic Sciences; Royal Veterinary College; Hatfield UK
| | - P. Lees
- Department of Comparative and Basic Sciences; Royal Veterinary College; Hatfield UK
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Preparation and the biopharmaceutical evaluation for the metered dose transdermal spray of dexketoprofen. JOURNAL OF DRUG DELIVERY 2014; 2014:697434. [PMID: 24660066 PMCID: PMC3934676 DOI: 10.1155/2014/697434] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/22/2013] [Accepted: 11/26/2013] [Indexed: 11/17/2022]
Abstract
The objective of the present work was to develop a metered dose transdermal spray (MDTS) formulation for transdermal delivery of dexketoprofen (DE). DE release from a series of formulations was assessed in vitro. Various qualitative and quantitative parameters like spray pattern, pump seal efficiency test, average weight per metered dose, and dose uniformity were evaluated. The optimized formulation with good skin permeation and an appropriate drug concentration and permeation enhancer (PE) content was developed incorporating 7% (w/w, %) DE, 7% (v/v, %) isopropyl myristate (IPM), and 93% (v/v, %) ethanol. In vivo pharmacokinetic study indicated that the optimized formulation showed a more sustainable plasma-concentration profile compared with the Fenli group. The antiinflammatory effect of DE MDTS was evaluated by experiments involving egg-albumin-induced paw edema in rats and xylene-induced ear swelling in mice. Acetic acid-induced abdominal constriction was used to evaluate the anti-nociceptive actions of DE MDTS. Pharmacodynamic studies indicated that the DE MDTS has good anti-inflammatory and anti-nociceptive activities. Besides, skin irritation studies were performed using rat as an animal model. The results obtained show that the MDTS can be a promising and innovative therapeutic system used in transdermal drug delivery for DE.
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Mustonen K, Niemi A, Raekallio M, Heinonen M, Peltoniemi OAT, Palviainen M, Siven M, Peltoniemi M, Vainio O. Enantiospecific ketoprofen concentrations in plasma after oral and intramuscular administration in growing pigs. Acta Vet Scand 2012; 54:55. [PMID: 22998765 PMCID: PMC3509396 DOI: 10.1186/1751-0147-54-55] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Accepted: 09/20/2012] [Indexed: 11/15/2022] Open
Abstract
Background Ketoprofen is a non-steroidal anti-inflammatory drug which has been widely used for domestic animals. Orally administered racemic ketoprofen has been reported to be absorbed well in pigs, and bioavailability was almost complete. The objectives of this study were to analyze R- and S-ketoprofen concentrations in plasma after oral (PO) and intra muscular (IM) routes of administration, and to assess the relative bioavailability of racemic ketoprofen for both enantiomers between those routes of administration in growing pigs. Methods Eleven pigs received racemic ketoprofen at dose rates of 4 mg/kg PO and 3 mg/kg IM in a randomized, crossover design with a 6-day washout period. Enantiomers were separated on a chiral column and their concentrations were determined by liquid chromatography-tandem mass spectrometry. Pharmacokinetic parameters were calculated and relative bioavailability (Frel) was determined for S and R –ketoprofen. Results S-ketoprofen was the predominant enantiomer in pig plasma after administration of the racemic mixture via both routes. The mean (± SD) maximum S-ketoprofen concentration in plasma (7.42 mg/L ± 2.35 in PO and 7.32 mg/L ± 0.75 in IM) was more than twice as high as that of R-ketoprofen (2.55 mg/L ± 0.99 in PO and 3.23 mg/L ± 0.70 in IM), and the terminal half-life was three times longer for S-ketoprofen (3.40 h ± 0.91 in PO and 2.89 h ± 0.85 in IM) than R-ketoprofen (1.1 h ± 0.90 in PO and 0.75 h ± 0.48 in IM). The mean (± SD) relative bioavailability (PO compared to IM) was 83 ± 20% and 63 ± 23% for S-ketoprofen and R-ketoprofen, respectively. Conclusions Although some minor differences were detected in the ketoprofen enantiomer concentrations in plasma after PO and IM administration, they are probably not relevant in clinical use. Thus, the pharmacological effects of racemic ketoprofen should be comparable after intramuscular and oral routes of administration in growing pigs.
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Neirinckx E, Croubels S, Remon JP, Devreese M, Backer PD, Vervaet C. Chiral inversion of R(-) to S(+) ketoprofen in pigs. Vet J 2012; 190:290-292. [PMID: 22108189 DOI: 10.1016/j.tvjl.2010.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 10/08/2010] [Accepted: 10/17/2010] [Indexed: 11/27/2022]
Abstract
The S(+) enantiomer of ketoprofen is predominant in the plasma of pigs after administration of racemic ketoprofen, although the occurrence and extent of R(-)-to-S(+) inversion is uncertain. Plasma concentrations of both enantiomers were measured and percentages of S(+) ketoprofen were calculated at different time points after intravenous and oral dosing of pigs with 1.5mg/kg R(-) ketoprofen. S(+) ketoprofen was formed immediately after administration and concentrations exceeded R(-) concentrations after 1h. Absence of pre-systemic inversion was deduced from the lower S(+) percentages after oral administration. A rapid and increasing inversion, reaching a maximum of about 70%, occurred and appeared to be responsible for the predominance of S(+) ketoprofen in pig plasma after administration of the racemate.
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Affiliation(s)
- Eva Neirinckx
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.
| | - Siska Croubels
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Jean Paul Remon
- Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Mathias Devreese
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Patrick De Backer
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
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Neirinckx E, Croubels S, De Boever S, Remon J, Bosmans T, Daminet S, De Backer P, Vervaet C. Species comparison of enantioselective oral bioavailability and pharmacokinetics of ketoprofen. Res Vet Sci 2011; 91:415-21. [DOI: 10.1016/j.rvsc.2010.08.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 07/08/2010] [Accepted: 08/30/2010] [Indexed: 11/15/2022]
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Guo CC, Tang YH, Hu HH, Yu LS, Jiang HD, Zeng S. Analysis of chiral non-steroidal anti-inflammatory drugs flurbiprofen, ketoprofen and etodolac binding with HSA. J Pharm Anal 2011; 1:184-190. [PMID: 29403697 PMCID: PMC5760788 DOI: 10.1016/j.jpha.2011.06.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Accepted: 06/09/2011] [Indexed: 11/20/2022] Open
Abstract
The protein binding of non-steroidal anti-inflammatory drugs flurbiprofen, ketoprofen and etodolac with human serum albumin (HSA) was investigated using indirect chiral high performance liquid chromatography (HPLC) and ultrafiltration techniques. S-(–)-1-(1-naphthyl)-ethylamine (S-NEA) was utilized as chiral derivatization reagent and pre-column derivatization RP-HPLC method was established for the separation and assay of the three pairs of enantiomer. The method had good linear relationship over the investigated concentration range without interference. The average extraction efficiency was higher than 85% in different systems, and the intra-day and inter-day precisions were less than 15%. In serum albumin, the protein binding of etodolac enantiomers showed significant stereoselectivity that the affinity of S-enantiomer was stronger than R-enantiomer, and the stereoselectivity ratio reached 6.06; Flurbiprofen had only weak stereoselectivity in HSA, and ketoprofen had no stereoselectivity at all. Scatchard curves showed that all the three chiral drugs had two types of binding sites in HSA.
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Affiliation(s)
- Chang-Chuan Guo
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yi-Hong Tang
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hai-Hong Hu
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lu-Shan Yu
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hui-Di Jiang
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Su Zeng
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Corresponding author. Tel./fax: +86 571 88208407.
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Fosse TK, Horsberg TE, Haga HA, Hormazabal V, Ranheim B. Enantioselective pharmacokinetics of ketoprofen in piglets: the significance of neonatal age. J Vet Pharmacol Ther 2011; 34:153-9. [PMID: 21395606 DOI: 10.1111/j.1365-2885.2010.01205.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Following intravenous dose of 6mg/kg racemic ketoprofen, the chiral pharmacokinetics of ketoprofen was investigated in eight piglets aged 6 and 21days old. S-ketoprofen predominated over R-ketoprofen in plasma of the piglets in both age groups. The volumes of distribution of S-ketoprofen for the 6- and 21-day-old piglets were 241.7 (211.3-276.5) mL/kg and 155.0 (138.7-173.1) mL/kg, respectively, while the corresponding parameters for R-ketoprofen were 289.2 (250.3-334.2) mL/kg and 193.0 (168.7-220.8) mL/kg. The clearances of R-ketoprofen [948.4 (768.0-1171.2) mL/h/kg and 425 (319.1-566.0) mL/h/kg for the 6- and 21-day-old piglets, respectively] were significantly higher compared to the clearances of S-ketoprofen [57.3 (46.6-70.4) mL/h/kg and 33.8 (27.0-42.2) mL/h/kg for 6- and 21-day-old piglets, respectively]. The elimination half-life of S-ketoprofen was 3.4h for both age groups, while the elimination half-life of R-ketoprofen was 0.2h for the 6-day-old and 0.4h for the 21-day-old piglets. The clearances of both R- and S-ketoprofen were significantly higher in the 6-day-old piglets compared to when they were 21 days old. Furthermore, the volumes of distribution were larger in the youngest age group.
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Affiliation(s)
- T K Fosse
- Department of Food Safety and Infection Biology, The Norwegian School of Veterinary Science, Oslo, Norway.
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17
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Fosse TK, Toutain PL, Spadavecchia C, Haga HA, Horsberg TE, Ranheim B. Ketoprofen in piglets: enantioselective pharmacokinetics, pharmacodynamics and PK/PD modelling. J Vet Pharmacol Ther 2010; 34:338-49. [PMID: 20950352 DOI: 10.1111/j.1365-2885.2010.01236.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The chiral pharmacokinetics and pharmacodynamics of ketoprofen were investigated in a placebo-controlled study in piglets after intramuscular administration of 6 mg/kg racemic ketoprofen. The absorption half-lives of both enantiomers were short, and S-ketoprofen predominated over R-ketoprofen in plasma. A kaolin-induced inflammation model was used to evaluate the anti-inflammatory, antipyretic and analgesic effects of ketoprofen. Skin temperatures increased after the kaolin injection, but the effect of ketoprofen was small. No significant antipyretic effects could be detected, but body temperatures tended to be lower in the ketoprofen-treated piglets. Mechanical nociceptive threshold testing was used to evaluate the analgesic effects. The piglets in the ketoprofen-treated group had significantly higher mechanical nociceptive thresholds compared to the piglets in the placebo group for 12-24 h following the treatment. Pharmacokinetic/pharmacodynamic modelling of the results from the mechanical nociceptive threshold testing gave a median IC(50) for S-ketoprofen of 26.7 μg/mL and an IC(50) for R-ketoprofen of 1.6 μg/mL. This indicates that R-ketoprofen is a more potent analgesic than S-ketoprofen in piglets. Estimated ED(50) for racemic ketoprofen was 2.5 mg/kg.
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Affiliation(s)
- T K Fosse
- Department of Food Safety and Infection Biology, The Norwegian School of Veterinary Science, Oslo, Norway.
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18
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MARTINEZ M, MODRIC S. Patient variation in veterinary medicine: part I. Influence of altered physiological states. J Vet Pharmacol Ther 2010; 33:213-26. [DOI: 10.1111/j.1365-2885.2009.01139.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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19
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Raekallio MR, Mustonen KM, Heinonen ML, Peltoniemi OAT, Säkkinen MS, Peltoniemi SM, Honkavaara JM, Vainio OM. Evaluation of bioequivalence after oral, intramuscular, and intravenous administration of racemic ketoprofen in pigs. Am J Vet Res 2008; 69:108-13. [PMID: 18167095 DOI: 10.2460/ajvr.69.1.108] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess bioequivalence after oral, IM, and IV administration of racemic ketoprofen in pigs and to investigate the bioavailability after oral and IM administration. ANIMALS 8 crossbred pigs. PROCEDURES Each pig received 4 treatments in a randomized crossover design, with a 6-day washout period. Ketoprofen was administered at 3 and 6 mg/kg, PO; 3 mg/kg, IM; and 3 mg/kg, IV. Plasma ketoprofen concentrations were measured by use of high-performance liquid chromatography for up to 48 hours. To assess bioequivalence, a 90% confidence interval was calculated for the area under the time-concentration curve (AUC) and maximum plasma concentration (C(max)). RESULTS Equivalence was not detected in the AUCs among the various routes of administration nor in C(max) between oral and IM administration of 3 mg/kg. The bioavailability of ketoprofen was almost complete after each oral or IM administration. Mean +/- SD C(max) was 5.09 +/- 1.41 microg/mL and 7.62 +/- 1.22 microg/mL after oral and IM doses of 3 mg/kg, respectively. Mean elimination half-life varied from 3.52 +/- 0.90 hours after oral administration of 3 mg/kg to 2.66 +/- 0.50 hours after IV administration. Time to peak C(max) after administration of all treatments was approximately 1 hour. Increases in AUC and C(max) were proportional when the orally administered dose was increased from 3 to 6 mg/kg. CONCLUSIONS AND CLINICAL RELEVANCE Orally administered ketoprofen was absorbed well in pigs, although bioequivalence with IM administration of ketoprofen was not detected. Orally administered ketoprofen may have potential for use in treating pigs.
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Affiliation(s)
- Marja R Raekallio
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, University of Helsinki, Fl-00014 Helsinki, Finland
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Nagilla R, Deshmukh DD, Duran SH, Ravis WR. Stereoselective pharmacokinetics of ketorolac in calves after a single intravenous and oral dose. J Vet Pharmacol Ther 2007; 30:437-42. [PMID: 17803736 DOI: 10.1111/j.1365-2885.2007.00892.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The purpose of this study was to establish the stereospecific pharmacokinetics of ketorolac (KT) in calves following a single 2 mg/kg intravenous (i.v.) and a single 8 mg/kg oral dose. Plasma concentrations were determined using a stereoselective HPLC assay. Pharmacokinetic parameters for both the stereoisomers were estimated by model-independent methods. Following an i.v. dose, the plasma concentration profiles of the stereoisomers were similar with half-lives of 5.9 +/- 5.1 h for R-KT and 6.0 +/- 4.9 h for S-KT. Clearance values for R- and S-KT after an i.v. dose were 0.0470 +/- 0.0370 and 0.0480 +/- 0.0370 L/h/kg respectively. After an oral dose, the terminal half-lives were longer than following i.v. administration with values of 14.77 +/- 3.08 and 14.55 +/- 2.95 h for R-KT and S-KT respectively. The average oral bioavailability was 86.5 +/- 20.6% for R-KT and 86.7 +/- 20.3% for S-KT. The results indicate that the stereoisomers of KT have similar pharmacokinetic profiles in calves. Although, unlike humans, bioinversion between KT stereoisomers appears minimal in calves, studies with individual isomers are needed before any firm conclusions can be drawn about this lack of KT bioinversion.
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Affiliation(s)
- R Nagilla
- GlaxoSmithKline, King of Prussia, PA 19406, USA.
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21
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Rao GS, Malik JK, Siddaraju VB, Shankaramurthy NC. Pharmacokinetics and bioavailability of nimesulide in goats. J Vet Pharmacol Ther 2007; 30:157-62. [PMID: 17348902 DOI: 10.1111/j.1365-2885.2007.00838.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The pharmacokinetic properties and bioavailability of cyclooxygenase (COX)-2 selective nonsteroidal anti-inflammatory drug nimesulide were investigated in female goats following intravenous (i.v.) and intramuscular (i.m.) administration at a dose of 4 mg/kg BW. Blood samples were collected by jugular venipuncture at predetermined times after drug administration. Plasma concentrations of nimesulide were determined by a validated high-performance liquid chromatography method. Plasma concentration-time data were subjected to compartmental analysis and pharmacokinetic parameters for nimesulide after i.v. and i.m. administration were calculated according to two- and one-compartment open models respectively. Following i.v. administration, a rapid distribution phase was followed by the slower elimination phase. The half-lives during the distribution phase (t1/2alpha) and terminal elimination phase (t1/2beta) were 0.11+/-0.10 and 7.99+/-2.23 h respectively. The steady-state volume of distribution (Vd(ss)), total body clearance (ClB) and mean residence time (MRT) of nimesulide were 0.64+/-0.13 L/kg, 0.06+/-0.02 L/h/kg and 11.72+/-3.42 h respectively. After i.m. administration, maximum plasma concentration (Cmax) of nimesulide was 2.83+/-1.11 microg/mL attained at 3.6+/-0.89 h (tmax). Plasma drug levels were detectable up to 72 h. Following i.m. injection, the t1/2beta and MRT of nimesulide were 1.63 and 1.73 times longer, respectively, than the i.v. administration. The bioavailability of nimesulide was 68.25% after i.m. administration at 4 mg/kg BW. These pharmacokinetic data suggest that nimesulide given intramuscularly may be useful in the treatment of inflammatory disease conditions in goats.
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Affiliation(s)
- G S Rao
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India
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22
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Sidhu PK, Landoni MF, Lees P. Pharmacokinetic and pharmacodynamic interactions of tolfenamic acid and marbofloxacin in goats. Res Vet Sci 2006; 80:79-90. [PMID: 16005916 DOI: 10.1016/j.rvsc.2005.04.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2004] [Revised: 03/10/2005] [Accepted: 04/22/2005] [Indexed: 11/30/2022]
Abstract
Pharmacokinetic and pharmacodynamic properties in goats of the non-steroidal anti-inflammatory drug tolfenamic acid (TA), administered both alone and in combination with the fluoroquinolone marbofloxacin (MB), were established in a tissue cage model of acute inflammation. Both drugs were injected intramuscularly at a dose rate of 2 mg kg(-1). After administration of TA alone and TA+MB pharmacokinetic parameters of TA (mean values) were Cmax=1.635 and 1.125 microg ml(-1), AUC=6.451 and 3.967 microgh ml(-1), t1/2K10=2.618 and 2.291 h, Vdarea/F=1.390 and 1.725Lkg(-1), and ClB/F=0.386 and 0.552 L kg(-1) h(-1), respectively. These differences were not statistically significant. Tolfenamic acid inhibited prostaglandin (PG)E2 synthesis in vivo in inflammatory exudate by 53-86% for up to 48 h after both TA treatments. Inhibition of synthesis of serum thromboxane (Tx)B2 ex vivo ranged from 16% to 66% up to 12h after both TA and TA+MB, with no significant differences between the two treatments. From the pharmacokinetic and eicosanoid inhibition data for TA, pharmacodynamic parameters after dosing with TA alone for serum TxB2 and exudate PGE2 expressing efficacy (Emax=69.4 and 89.7%), potency (IC50=0.717 and 0.073 microg ml(-1)), sensitivity (N=3.413 and 1.180) and equilibration time (t1/2Ke0=0.702 and 16.52 h), respectively, were determined by PK-PD modeling using an effect compartment model. In this model TA was a preferential inhibitor of COX-2 (COX-1:COX-2 IC50 ratio=12:1). Tolfenamic acid, both alone and co-administered with MB, did not affect leucocyte numbers in exudate, transudate or blood. Compared to placebo significant attenuation of skin temperature rise over inflamed tissue cages was obtained after administration of TA and TA+MB with no significant differences between the two treatments. Marbofloxacin alone did not significantly affect serum TxB2 and exudate PGE2 concentrations or rise in skin temperature over exudate tissue cages. These data provide a basis for the rational use of TA in combination with MB in goat medicine.
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Affiliation(s)
- P K Sidhu
- Department of Epidemiology and Preventive Veterinary Medicine, College of Veterinary Science, Punjab Agricultural University, Ludhiana 141004, Punjab, India
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23
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Sidhu PK, Landoni MF, Lees P. Influence of marbofloxacin on the pharmacokinetics and pharmacodynamics of tolfenamic acid in calves. J Vet Pharmacol Ther 2005; 28:109-19. [PMID: 15720523 DOI: 10.1111/j.1365-2885.2004.00633.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Pharmacokinetic and pharmacodynamic properties of tolfenamic acid (TA) in calves were determined in serum and fluids of inflamed (carrageenan administered) and non-inflamed subcutaneously implanted tissue cages after intramuscular administration both alone and in combination with marbofloxacin (MB). MB significantly altered the pharmacokinetics of TA: mean values were Cmax = 2.14 and 1.64 microg/mL, AUC = 27.38 and 16.80 microg.h/mL, Vd(area)/F = 0.87 and 1.17 L/kg, and ClB/F = 0.074 and 0.128 L/kg/h, respectively, after administration of TA alone and TA + MB. T(1/2)K10 and MRT were not significantly different for the two treatments. The pharmacodynamic properties of TA were not influenced by MB co-administration, in spite of the alterations in some TA pharmacokinetic parameters. TA inhibited prostaglandin E2 (PGE2) synthesis in vivo in inflammatory exudate by 50-88% for up to 48 h after both TA treatments. Inhibition of synthesis of serum thromboxane B2 (TxB2) ex vivo ranged from 40 to 85% up to 24 h after both TA and TA + MB. From the derived pharmacokinetic and eicosanoid inhibition data for TA, pharmacodynamic parameters for serum TxB2 and exudate PGE2 inhibition expressing efficacy (Emax = 78.1 and 97.5%), potency (IC50 = 0.256 and 0.265 microg/mL), sensitivity (N = 1.96 and 2.29) and the pharmacokinetic parameter equilibration time (t(1/2)K(e0) = 0.695 and 24.0 h), respectively, were determined. In this model TA was a nonselective inhibitor of cyclo-oxygenase (COX) (COX-1:COX-2 IC50 ratio = 1.37). TA, both alone and co-administered with MB, did not affect leucocyte numbers in exudate, transudate or blood. Partial attenuation of skin temperature rise over inflamed tissue cages and reduction of zymosan-induced skin swelling were recorded after administration of TA and TA + MB with no significant differences between the two treatments. These data provide a basis for the rational use of TA in combination with MB in calf medicine.
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Affiliation(s)
- P K Sidhu
- Department of Epidemiology and Preventive Veterinary Medicine, College of Veterinary Science, Punjab Agricultural University, Ludhiana, Punjab, India
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Toutain PL, Lees P. Integration and modelling of pharmacokinetic and pharmacodynamic data to optimize dosage regimens in veterinary medicine. J Vet Pharmacol Ther 2005; 27:467-77. [PMID: 15601441 DOI: 10.1111/j.1365-2885.2004.00613.x] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In veterinary drug development procedures, pharmacokinetic (PK) and pharmacodynamic (PD) data have generally been established in separate, parallel studies to assist in the design of dosage schedules for subsequent evaluation in clinical trials. This review introduces the concept of PK/PD modelling, an approach in which PK and PD data are generated in the same study, and used to derive numerical values for PD parameters based on drug plasma concentrations. The PD parameters define the efficacy, potency and slope (sensitivity) of the concentration-effect relationship. It is proposed that the parameters derived from PK/PD modelling may be used as an alternative and preferred approach to dose titration studies for selecting rational dosage regimens (both dose and dosing interval) for further evaluation in clinical trials. In PK/PD modelling, the explicative variable for effect is the plasma concentration profile. The PK/PD approach provides several advantages over dose-titration studies, including determination of a projected dosage regimen by investigation of a single dose, in contrast to dose-ranging studies which by definition require testing of multiple dosage. Implementation of PK/PD modelling in the veterinary drug development process is currently constrained by the limited number of veterinary studies performed to date, and the consequently limited understanding of PK/PD concepts and their absence from regulatory authority guidelines. Nevertheless, PK/PD modelling has major potential for rational dosage regimen determination, as it considers and quantifies the two main sources of interspecies variability (PK and PD). It is therefore applicable to interspecies extrapolation and to multiple species drug development. As well as the currently limited appreciation of PK/PD principles in the veterinary scientific community, a further constraint in implementing PK/PD modelling is the need to validate PK/PD approaches and thereby gain confidence in its value by pharmaceutical companies and regulatory authorities.
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Affiliation(s)
- P L Toutain
- UMR 181 Physiopathologie et Toxicologie Expérimentales INRA/ENVT, Ecole Nationale Vétérinaire de Toulouse, Toulouse cedex 03, France.
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Lees P, Landoni MF, Giraudel J, Toutain PL. Pharmacodynamics and pharmacokinetics of nonsteroidal anti-inflammatory drugs in species of veterinary interest. J Vet Pharmacol Ther 2005; 27:479-90. [PMID: 15601442 DOI: 10.1111/j.1365-2885.2004.00617.x] [Citation(s) in RCA: 183] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This review summarises selected aspects of the pharmacokinetics (PK) and pharmacodynamics (PD) of nonsteroidal anti-inflammatory drugs (NSAIDs). It is not intended to be comprehensive, in that it covers neither minor species nor several important aspects of NSAID PD. The limited objective of the review is to summarise those aspects of NSAID PK and PD, which are important to an understanding of PK-PD integration and PK-PD modelling (the subject of the next review in this issue). The general features of NSAID PK are: usually good bioavailability from oral, intramuscular and subcutaneous administration routes (but with delayed absorption in horses and ruminants after oral dosing), a high degree of binding to plasma protein, low volumes of distribution, limited excretion of administered dose as parent drug in urine, marked inter-species differences in clearance and elimination half-life and ready penetration into and slow clearance from acute inflammatory exudate. The therapeutic effects of NSAIDs are exerted both locally (at peripheral inflammatory sites) and centrally. There is widespread acceptance that the principal mechanism of action (both PD and toxicodynamics) of NSAIDs at the molecular level comprises inhibition of cyclooxygenase (COX), an enzyme in the arachidonic acid cascade, which generates inflammatory mediators of the prostaglandin group. However, NSAIDs possess also many other actions at the molecular level. Two isoforms of COX have been identified. Inhibition of COX-1 is likely to account for most of the side-effects of NSAIDs (gastrointestinal irritation, renotoxicity and inhibition of blood clotting) but a minor contribution also to some of the therapeutic effects (analgesic and anti-inflammatory actions) cannot be excluded. Inhibition of COX-2 accounts for most and possibly all of the therapeutic effects of NSAIDs. Consequently, there has been an intensive search to identify and develop drugs with selectivity for inhibition of COX-2. Whole blood in vitro assays are used to investigate quantitatively the three key PD parameters (efficacy, potency and sensitivity) for NSAID inhibition of COX isoforms, providing data on COX-1:COX-2 inhibition ratios. Limited published data point to species differences in NSAID-induced COX inhibition, for both potency and potency ratios. Members of the 2-arylpropionate sub-groups of NSAIDs exist in two enantiomeric forms [R-(-) and S-(+)] and are licensed as racemic mixtures. For these drugs there are marked enantiomeric differences in PK and PD properties of individual drugs in a given species, as well as important species differences in both PK and PD properties.
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Affiliation(s)
- P Lees
- Royal Veterinary College, Hawkshead Campus, Hatfield, Hertfordshire AL9 7TA, UK.
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Lees P, Giraudel J, Landoni MF, Toutain PL. PK-PD integration and PK-PD modelling of nonsteroidal anti-inflammatory drugs: principles and applications in veterinary pharmacology. J Vet Pharmacol Ther 2005; 27:491-502. [PMID: 15601443 DOI: 10.1111/j.1365-2885.2004.00618.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Much useful information relevant to elucidation of mechanism of action of nonsteroidal anti-inflammatory drugs (NSAIDs) at the molecular level can be obtained from integrating pharmacokinetic (PK) and pharmacodynamic (PD) data, such data being obtained usually, although not necessarily, in separate studies. Integrating PK and PD data can also provide a basis for selecting clinically relevant dosing schedules for subsequent evaluation in disease models and clinical trials. The principles underlying and uses of PK-PD integration are illustrated in this review for phenylbutazone in the horse and cow, carprofen and meloxicam in the horse, carprofen and meloxicam in the cat and nimesulide in the dog. In the PK-PD modelling approach for NSAIDs, the PK and PD data are generated (usually though not necessarily) in vivo in the same investigation and then modelled in silico, usually using the integrated effect compartment or indirect response models. Drug effect is classically modelled with the sigmoidal E(max) (Hill) equation to derive PD parameters which define efficacy, potency and sensitivity. The PK-PD modelling approach for NSAIDs can be undertaken at the molecular level using surrogates of inhibition of cyclooxygenase (COX) isoforms (or indeed other enzymes e.g. 5-lipoxygenase). Examples are provided of the generation of PD parameters for several NSAIDs (carprofen, ketoprofen, vedaprofen, flunixin and tolfenamic acid) in species of veterinary interest (horse, calf, sheep and goat), which indicate that all drugs investigated except vedaprofen were non-selective for COX-1 and COX-2 in the four species investigated under the experimental conditions used, vedaprofen being a COX-1 selective NSAID. In these studies, plasma concentration was linked to COX inhibitory action in the biophase using an effect compartment model. Data for S-(+)-ketoprofen have been additionally subjected to inter-species modelling and allometric scaling of both PK and PD parameters. For several species values of four PK parameters were highly correlated with body weight, whilst values for PD parameters based on COX inhibition lacked allometric relationship with body weight. PK-PD modelling of NSAIDs has also been undertaken using clinical end-points and surrogates for clinical end-points in disease models. By measurement of clinically relevant indices in clinically relevant models, data generated for PD parameters have been used to set dosages and dose intervals for evaluation and confirmation in clinical trials. PK-PD modelling of NSAIDs is likely to prove superior to conventional dose titration studies for dosage schedule determination, as it sweeps the whole of the concentration-effect relationship for all animals and therefore permits determination of genuine PD parameters. It also introduces time as a second independent variable thus allowing prediction of dosage interval. Using indirect response models and clinically relevant indices, PD data have been determined for flunixin, phenylbutazone and meloxicam in the horse, nimesulide in the dog and meloxicam in the cat.
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Affiliation(s)
- P Lees
- Royal Veterinary College, Hawkshead Campus, Hatfield, Hertfordshire AL9 7TA, UK.
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Lees P. Pharmacology of drugs used to treat osteoarthritis in veterinary practice. Inflammopharmacology 2004; 11:385-99. [PMID: 15035792 DOI: 10.1163/156856003322699564] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
As in humans, pain in animals may be associated with a wide range of conditions and circumstances, ranging from acute trauma to joint diseases. Joint diseases are common in companion animal medicine (horse, dog, cat) and at least 80% of cases are classified as osteoarthritis (OA). Several drug classes are available for OA therapy, including corticosteroids, non-steroidal antiinflammatory drugs (NSAIDs), agents with potential disease modifying properties and nutraceuticals. For long-term maintenance OA treatment, particularly in the horse and dog, NSAIDs are routinely and extensively used. This review outlines the pharmacokinetics (PK) and pharmacodynamics (PD) of NSAIDs in companion and farm animal species. NSAID PK and PD have been studied in models of acute inflammation, which enable use of PK-PD modeling to facilitate (a) studies of mechanism of action at the molecular level and (b) prediction of dosages for clinical use. The PK-PD approach is a powerful but underutilized tool which also facilitates inter-species comparisons.
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Affiliation(s)
- Peter Lees
- The Royal Veterinary College, Hawkshead Campus, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK.
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Lepist EI, Jusko WJ. Modeling and allometric scaling of s(+)-ketoprofen pharmacokinetics and pharmacodynamics: a retrospective analysis. J Vet Pharmacol Ther 2004; 27:211-8. [PMID: 15305849 DOI: 10.1111/j.1365-2885.2004.00579.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interspecies scaling of pharmacokinetic (PK) parameters is commonplace in drug development. However, information about proportionality of pharmacodynamic (PD) parameters in different species is scarce. We investigated the feasibility of allometric scaling of PK and PD parameters of s(+)-ketoprofen (sKTP) using the literature data from several animal species. Two different indirect response models were proposed to characterize sKTP inhibitory effects on synthesis of thromboxane B(2) (TXB(2)) and prostaglandin E(2) (PGE(2)). Using the traditional allometric approach, the obtained PK and PD parameters were plotted against body weights (BW) on a log-log scale. For all species, values of systemic clearance (Cl), distribution clearance (Cl(D)), central volume of distribution (V(c)), and volume of distribution at steady-state (V(ss)) were highly correlated (r(2) = 0.89-0.99) with BW. The PD parameters for inhibition of TXB(2) synthesis were poorly correlated with BW (r(2) = 0.25-0.54) while most of the parameters for inhibition of PGE(2) synthesis lacked any correlation (r(2) approximately 0.05). In conclusion, indirect response models adequately described the time course of sKTP inhibitory effects on synthesis of TXB(2) and PGE(2). Allometrical scaling showed PK parameters to change proportionally to BW, whereas PD parameters had limited ranges and were essentially weight independent.
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Affiliation(s)
- E-I Lepist
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY 14260, USA
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Arifah AK, Landoni MF, Lees P. Pharmacodynamics, chiral pharmacokinetics and PK-PD modelling of ketoprofen in the goat. J Vet Pharmacol Ther 2003; 26:139-50. [PMID: 12667184 DOI: 10.1046/j.1365-2885.2003.00455.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
There have been few studies of the pharmacodynamics of nonsteroidal antiinflammatory drugs (NSAIDs) using PK-PD modelling, yet this approach offers the advantage of defining the whole concentration-effect relationship, as well as its time course and sensitivity. In this study, ketoprofen (KTP) was administered intravenously to goats as the racemate (3.0 mg/kg total dose) and as the single enantiomers, S(+) KTP and R(-) KTP (1.5 mg/kg of each). The pharmacokinetics and pharmacodynamics of KTP were investigated using a tissue cage model of acute inflammation. The pharmacokinetics of both KTP enantiomers was characterized by rapid clearance, short mean residence time (MRT) and low volume of distribution. The penetration of R(-) KTP into inflamed (exudate) and noninflamed (transudate) tissue cage fluids was delayed but area under the curve values were only slightly less than those in plasma, whereas MRT was much longer. The S(+) enantiomer of KTP penetrated less readily into exudate and transudate. Unidirectional inversion of R(-) to S(+) KTP occurred. Both rac-KTP and the separate enantiomers produced marked inhibition of serum thromboxane B2 (TxB2) synthesis (ex vivo) and moderate inhibition of exudate prostaglandin E2 (PGE2) synthesis (in vivo); pharmacodynamic variables for S(+) KTP were Emax (%) = 94 and 100; IC50 (microg/mL) = 0.0033 and 0.0030; N = 0.45 and 0.58, respectively, where Emax is the maximal effect, IC50 the plasma drug concentration producing 50% of Emax and N the slope of log concentration/effect relationship. The IC50 ratio, serum TxB2:exudate PGE2 was 1.10. Neither rac-KTP nor the individual enantiomers suppressed skin temperature rise at, or leucocyte infiltration into, the site of acute inflammation. These data illustrate for KTP shallow concentration-response relationships, probable nonselectivity of KTP for cyclooxygenase (COX)-1 and COX-2 inhibition and lack of measurable effect on components of inflammation.
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Affiliation(s)
- A K Arifah
- The Royal Veterinary College, University of London, Hawkshead Campus, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK
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Sidhu P, Shojaee Aliabadi F, Andrews M, Lees P. Tissue chamber model of acute inflammation in farm animal species. Res Vet Sci 2003; 74:67-77. [PMID: 12507568 DOI: 10.1016/s0034-5288(02)00149-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A tissue chamber model of acute inflammation for use in comparative studies in calves, sheep, goats and pigs has been established and validated. Tissue chambers were prepared from silicon rubber tubing, of inner diameter 12.7 mm, length 115 mm and volume 15 ml, with 10 holes, each of 6mm diameter, at each end. In each animal two or four chambers were inserted at subcutaneous sites. Six weeks after implantation an acute inflammatory reaction in a single cage was generated by the intracaveal injection of 0.5 ml of 1% carrageenan solution. Serial samples of exudate (injected chamber), transudate (non-injected chamber) and blood were collected for measurement of exudate and transudate leucocyte count, prostaglandin (PG)E(2) concentration in exudate and serum thromboxane (Tx)B(2) concentration. In addition, skin temperature changes over exudate and transudate chambers were recorded. In all four species, carrageenan induced an acute inflammatory response, indicated by increases to peak values followed by return towards baseline in skin temperature, leucocyte count and PGE(2) concentration. For each of these variables in calves, sheep and goats the increases were significantly greater for exudate than for transudate. The degree of intra-species variation in each variable was acceptable. Marked inter-species differences were recorded: skin temperature rise was greatest in calves and least in sheep and goats; exudate PGE(2) concentration was increased in the order sheep>goat>pig>calf; serum TxB(2) concentration was increased in the order calf>goat>sheep>pig and exudate leucocyte count was increased to a greater extent in the pig than in the three ruminant species. The model has advantages over some previously described tissue chamber models of inflammation and will be suitable for use in comparative studies of inflammatory mechanisms and the pharmacokinetics and pharmacodynamics of anti-inflammatory drugs.
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Affiliation(s)
- P Sidhu
- The Royal Veterinary College, Hawkshead Campus, North Mymms, Hatfield, AL9 7TA, Hertfordshire, UK
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31
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Lees P, Taylor PM, Landoni FM, Arifah AK, Waters C. Ketoprofen in the cat: pharmacodynamics and chiral pharmacokinetics. Vet J 2003; 165:21-35. [PMID: 12618066 DOI: 10.1016/s1090-0233(02)00168-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The non-steroidal anti-inflammatory drug ketoprofen (KTP) was administered as the racemate to cats intravenously (IV) and orally at clinically recommended dose rates of 2 and 1 mg/kg, respectively, to establish its chiral pharmacokinetic and pharmacodynamic properties. After IV dosing, clearance was more than five times greater and elimination half-life and mean residence time were approximately three times shorter for R(-) KTP than for S(+) KTP. Absorption of both S(+) and R(-) enantiomers was rapid after oral dosing and enantioselective pharmacokinetics was demonstrated by the predominance of S(+) KTP, as indicated by plasma AUC of 20.25 (S(+)KTP) and 4.09 (R(-)KTP) microg h/mL after IV and 6.36 (S(+)KTP) and 1.83 (R(-)KTP) microg h/mL after oral dosing. Bioavailability after oral dosing was virtually complete. Reduction in ex vivo serum thromboxane (TX)B(2) concentrations indicated marked inhibition of platelet cyclo-oxygenase (COX)-1 for 24 h after both oral and IV dosing and inhibition was statistically significant for 72 h after IV dosing. Both oral and IV rac-KTP failed to affect wheal volume produced by intradermal injection of the mild irritant carrageenan but wheal skin temperature was significantly inhibited by IV rac-KTP at some recording times. Possible reasons for the disparity between marked COX-1 inhibition and the limited effect on the cardinal signs of inflammation are considered. In a second experiment, the separate enantiomers of KTP were administered IV, each at the dose rate of 1mg/kg. S(+)KTP again predominated in plasma and there was unidirectional chiral inversion of R(-) to S(+)KTP. Administration of both enantiomers again produced marked and prolonged inhibition of platelet COX-1 and, in the case of R(-)KTP, this was probably attributable to S(+)KTP formed by chiral inversion.
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Affiliation(s)
- P Lees
- Department of Veterinary Basic Sciences, The Royal Veterinary College, Hawkshead Campus, North Mymms, Hatfield, Herts. AL9 7TA, UK.
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Mullangi R, Yao M, Srinivas NR. Resolution of enantiomers of ketoprofen by HPLC: a review. Biomed Chromatogr 2003; 17:423-34. [PMID: 14598325 DOI: 10.1002/bmc.277] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Today, a heightened awareness of the applicability of enantiomers in medicine and clinical practice has been gene-rated due to the continuous evolvement of the field of chirality. In this context, this article provides a review of separation of ketoprofen, an important drug, in a popular class of non-steroidal anti-inflammatory drugs (i.e. profens). This review highlights various methodologies, logistical considerations for separation and provides an exhaustive list of applications mainly focusing on the pharmacokinetic aspects. Clearly, the application of enantioselective methods for drug racemates paves the way to understand the in vivo behavior of individual enantiomer and hence an opportunity for an alternate and/or better option for treating the disease.
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Affiliation(s)
- Ramesh Mullangi
- Bioanalysis, Metabolism and Pharmacokinetics Laboratories, Discovery Research, Dr. Reddy's Laboratories Ltd., Miyapur, Hyderabad-500 050, India
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Toutain PL. Pharmacokinetic/pharmacodynamic integration in drug development and dosage-regimen optimization for veterinary medicine. AAPS PHARMSCI 2002; 4:E38. [PMID: 12646010 PMCID: PMC2751327 DOI: 10.1208/ps040438] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2002] [Accepted: 07/01/2002] [Indexed: 12/29/2022]
Abstract
Pharmacokinetic (PK)/pharmacodynamic (PD) modeling is a scientific tool to help developers select a rational dosage regimen for confirmatory clinical testing. This article describes some of the limitations associated with traditional dose-titration designs (parallel and crossover designs) for determining an appropriate dosage regimen. It also explains how a PK/PD model integrates the PK model (describing the relationship between dose, systemic drug concentrations, and time) with the PD model (describing the relationship between systemic drug concentration and the effect vs time profile) and a statistical model (particularly, the intra- and interindividual variability of PK and/or PD origin). Of equal importance is the utility of these models for promoting rational drug selection on the basis of effectiveness and selectivity. PK/PD modeling can be executed using various approaches, such as direct versus indirect response models and parametric versus nonparametric models. PK/PD concepts can be applied to individual dose optimization. Examples of the application of PK/PD approaches in veterinary drug development are provided, with particular emphasis given to nonsteroidal anti-inflammatory drugs. 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.
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Affiliation(s)
- Pierre-Louis Toutain
- Ecole Nationale Veterinaire de Toulouse, UMR 181 INRA de Physiopathologie et Toxicologie Experimentales, Toulouse, France.
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Aliabadi FS, Lees P. Pharmacokinetics and pharmacodynamics of danofloxacin in serum and tissue fluids of goats following intravenous and intramuscular administration. Am J Vet Res 2001; 62:1979-89. [PMID: 11763192 DOI: 10.2460/ajvr.2001.62.1979] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the pharmacokinetics and pharmacodynamics of danofloxacin in goats and the concentrations required to induce bacteriostasis, bactericidal activity, and bacterial elimination. ANIMALS 6 healthy British Saanen goats. PROCEDURE Danofloxacin (1.25 mg/kg of body weight) was administered i.v. and i.m. in a cross-over design with 14 days between treatments. A tissue cage was used for evaluation of drug distribution into transudate and exudate. The ex vivo antibacterial activity of danofloxacin in serum, exudate, and transudate against a caprine isolate of Mannheimia haemolytica was determined. Pharmacokinetic and pharmacodynamic data were integrated to determine the ratio of the area under the concentration versus time curve to the minimum inhibitory concentration of danofloxacin (AUIC). RESULTS Elimination half-lives of danofloxacin in serum were 4.67 and 4.41 hours after i.v. and i.m. administration, respectively. Volume of distribution was high after administration via either route, and bioavailability was 100% after i.m. administration. Rate of penetration into exudate and transudate was slow, but elimination half-lives from both fluids were approximately twice that from serum. Drug concentrations in serum, exudate, and transudate for 9 to 12 hours after administration induced marked ex vivo antibacterial activity. For serum, AUIC24h values required for bacteriostasis, bactericidal effect, and bacterial elimination were 22.6, 29.6, and 52.4, respectively. Similar values were obtained for exudate and transudate. CONCLUSIONS AND CLINICAL RELEVANCE Integration of danofloxacin pharmacokinetic and pharmacodynamic data obtained in goats may provide a new approach on which to base recommendations for therapeutic dosages.
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Affiliation(s)
- F S Aliabadi
- Department of Veterinary Basic Sciences, The Royal Veterinary College, Hatfield, Hertfordshire, UK
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Navarre CB, Ravis WR, Campbell J, Nagilla R, Duran SH, Pugh DG. Stereoselective pharmacokinetics of ketoprofen in llamas following intravenous administration. J Vet Pharmacol Ther 2001; 24:223-6. [PMID: 11442802 DOI: 10.1046/j.1365-2885.2001.00321.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- C B Navarre
- Department of Large Animal Surgery and Medicine, Auburn University, AL 36849, USA.
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Verde CR, Simpson MI, Frigoli A, Landoni MF. Enantiospecific pharmacokinetics of ketoprofen in plasma and synovial fluid of horses with acute synovitis. J Vet Pharmacol Ther 2001; 24:179-85. [PMID: 11442795 DOI: 10.1046/j.1365-2885.2001.00336.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Pharmacokinetic parameters were established for enantiomers of the nonsteroidal anti-inflammatory drug (NSAID) ketoprofen (KTP) administered as the racemic mixture at a dose of 2.2 mg/kg and as separate enantiomers, each at a dose of 1.1 mg/kg to a group of six horses (five mares and one gelding). A four-period cross-over study in a LPS-induced model of acute synovitis was used. After administration of the racemic mixture S(+)KTP was the predominant enantiomer in plasma as well as in synovial fluid. Unidirectional inversion of R(-) to S(+)KTP was demonstrated but the inversion was less marked than previously reported. It is suggested that this reduction could be because of the influence of the inflammatory reaction on hepatic metabolism. The disposition of KTP enantiomers after administration of the racemic mixture was similar to those observed after administration of S(+) and R(-)KTP. The S(+) and R(-)KTP concentrations in synovial fluid were low and short lasting. After administration of R(-)KTP significant concentrations of the optical antipode were detected in synovial fluid.
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Affiliation(s)
- C R Verde
- Cátedra de Farmacología, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 cc 296 (1900) La Plata, Argentina
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Arifah AK, Landoni MF, Frean SP, Lees P. Pharmacodynamics and pharmacokinetics of ketoprofen enantiomers in sheep. Am J Vet Res 2001; 62:77-86. [PMID: 11197566 DOI: 10.2460/ajvr.2001.62.77] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To establish pharmacokinetic and pharmacodynamic properties of a racemic mixture and individual R(-) and S(+) enantiomeric forms of ketoprofen (KTP) in sheep and determine pharmacodynamic variables of KTP by pharmacokinetic-pharmacodynamic modeling. ANIMALS 8 female Dorset crossbred sheep. PROCEDURE A tissue cage model of inflammation was used. Carrageenan was administered into tissue cages. Time course of cyclooxygenase (COX)-2 inhibition was determined in vivo by measurement of exudate prostaglandin E2 (PGE2) concentrations. Time course of COX-1 inhibition was determined ex vivo by measurement of serum thromboxane B2 (TXB2) concentrations. In addition, plasma concentration-time course and penetration of KTP enantiomers into inflammatory exudate and transudate (noninflamed tissue cage fluid) were investigated. Four treatments were compared: placebo, racemic mixture (rac-KTP [3 mg/kg of body weight, IV]), S(+) KTP (1.5 mg/kg, IV),and R(-) KTP (1.5 mg/kg, IV). RESULTS Both KTP enantiomers had elimination half-life and mean residence time measurements that were short and volume of the central compartment and steady state volume of distribution that were low. Clearance was rapid, particularly for R(-) KTP Elimination of both enantiomers from exudate was > 10 times slower than from plasma. Both rac-KTP and the individual enantiomers significantly inhibited serum TXB2 concentrations for 12 hours. Rac-KTP and S(+) KTP, but not R(-) KTP, also significantly inhibited PGE2 synthesis in exudate for 12 hours. CONCLUSIONS AND CLINICAL RELEVANCE Inhibition of serum TXB2 concentration and exudate PGE2 synthesis for similar time courses after S(+) KTP administration indicates that it is a nonselective inhibitor of COX in sheep.
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Affiliation(s)
- A K Arifah
- Department of Veterinary Basic Sciences, Royal Veterinary College, Hatfield, Hertfordshire, United Kingdom
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38
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Castro E, Soraci A, Fogel F, Tapia O. Chiral inversion of R(-) fenoprofen and ketoprofen enantiomers in cats. J Vet Pharmacol Ther 2000; 23:265-71. [PMID: 11106999 DOI: 10.1046/j.1365-2885.2000.00280.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The chiral inversion process is a characteristic metabolic pathway for different aryl-2-propionic acids or profens. Important variations have been observed between these individual compounds as well as between animal species. In this study, R(-) fenoprofen [R(-)FPF] and R(-) ketoprofen [R(-) KTF] were used to investigate their comparative stereoconversion in cats. After intravenous (i.v.) administration of R(-) FPF, the percentage of chiral inversion was 93.20+/-13.70%. A highly significant correlation (r: 0.978) was observed between the clearance of R(-) FPF and the chiral inversion process. After i.v. administration of R(-) KTF, the percentage of inversion was only 36.73+/-2.8%. No correlation between the clearance of R(-) KTF and this process was observed. R(-) FPF was metabolized by the pathways of thioesterification - chiral inversion processes. For R(-) KTF, the competitive metabolic pathways, glucuronidation and hydroxylation may be involved. However, these metabolic steps are saturable or less functional in cats. Moreover, the thioesterification of R(-) KTF in in vitro studies has been shown to be important in carnivores. The lack of correlation between clearance and chiral inversion process of R(-) KTF may be finally explained by deviation of thioesterification to other metabolic pathways of lipids and/or aminoacid conjugation, particulary glicine derivatives.
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Affiliation(s)
- E Castro
- Departamento de Fisiopatología, Area de Toxicología, Campus Universitario, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Tandil (7000), Argentina
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Landoni MF, Comas W, Mucci N, Anglarilli G, Bidal D, Lees P. Enantiospecific pharmacokinetics and pharmacodynamics of ketoprofen in sheep. J Vet Pharmacol Ther 1999; 22:349-59. [PMID: 10651463 DOI: 10.1046/j.1365-2885.1999.00209.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Pharmacokinetic and pharmacodynamic parameters were established for the enantiomers of the 2-arylpropionic acid (APA) nonsteroidal anti-inflammatory drug (NSAID), ketoprofen (KTP). Each enantiomer was administered separately (1.5 mg/kg) and in a racemic mixture (3 mg/kg) intravenously (i.v.) to a group of eight sheep in a four-way, four-period cross-over study using a tissue cage model of inflammation. Plasma disposition of each KTP enantiomer was similar following separate administration of the pure compounds compared to administration of the racemic mixture. S(+)KTP volume of distribution (Vd(area)) was higher and clearance (ClB) faster than those of R(-)KTP. S(+) and R(-)KTP achieved relatively low concentrations in exudate and transudate. Unidirectional limited chiral inversion of R(-) to S(+)KTP was demonstrated. After R(-)KTP administration S(+)KTP was detected in plasma, but not in either exudate or transudate. Pharmacokinetic/pharmacodynamic (PK/PD) modelling of the data could not be undertaken following R(-)KTP administration because of chiral inversion to S(+)KTP, but the pharmacodynamic parameters, calculated maximum effect (Emax), concentration producing 50% effect (EC50), Hill's coefficient (N), rate constant of elimination of drug effect from the compartment (KeO) and mean equilibration half-life (t1/2KeO) were determined for S(+)KTP after administration of the racemic mixture as well as the pure compound.
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Affiliation(s)
- M F Landoni
- Cátedra de Farmacologia, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Argentina
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Corveleyn S, Henrist D, Remon JP, Van Der Weken G, Baeyens W, Haustraete J, Aboul-Enein HY, Sustronck B, Deprez P. Bioavailability of racemic ketoprofen in healthy horses following rectal administration. Res Vet Sci 1999; 67:203-4. [PMID: 10502494 DOI: 10.1053/rvsc.1999.0303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Ketoprofen (KTP) is a chiral non-steroidal anti-inflammatory drug (NSAID) of the propionic acid class, approved by the FDA for the allevation of pain associated with musculoskeletal disorders in horses. The present study was designed to examine the bioavailability of ketoprofen enantiomers after rectal administration of the racemate to healthy horses. One gram of racemic ketoprofen was injected intravenously and administered rectally as a fat based suppository in a cross-over design study (n = 4). Blood samples were analysed for KTP enantiomers using HPLC. After IV administration, the S(+) enantiomer concentrations in plasma were higher than the R(-) enantiomer concentrations and the AUC(0-12 h) for the S(+) enantiomer was significantly higher than for the R(-) enantiomer. Following rectal administration C(max) and AUC(0-12 h) were significantly higher for the S(+) than for the R(-) enantiomer. Bioavailability after rectal administration was low. Since there was no significant difference in bioavailability between the two enantiomers, it is assumed that no pre-systemic inversion from R(-) to S(+) occurred after rectal administration of racemic KTP to horses.
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Affiliation(s)
- S Corveleyn
- Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, University of Gent, Harelbekestraat 72, Gent, 9000, Belgium
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Aboul-Enein HY, Van Overbeke A, Vander Weken G, Baeyens W, Oda H, Deprez P, De Kruif A. HPLC on Chiralcel OJ-R for enantiomer separation and analysis of ketoprofen, from horse plasma, as the 9-aminophenanthrene derivative. J Pharm Pharmacol 1998; 50:291-6. [PMID: 9600721 DOI: 10.1111/j.2042-7158.1998.tb06863.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Racemic ketoprofen is a non-steroidal anti-inflammatory drug used to treat musculoskeletal and colic conditions in horses. The enantioselective chiral inversion of ketoprofen administered to horses has been studied by use of cellulose tris(4-methylbenzoate), also known as Chiralcel OJ-R, as chiral stationary phase; acetonitrile - 0.02 M perchlorate buffer (pH 2.0)-methanol, 60:15:25 (v/v/v) was used as mobile phase. Before chromatography, to effect adequate chiral interaction with the chiral stationary phase ketoprofen was derivatized with 9-aminophenanthrene, under acid conditions, after solid-phase (C18) extraction and then liquid-liquid extraction, to ensure effective removal of endogenous plasma materials. The 9-aminophenanthrene derivative of S-ibuprofen was used as internal standard. The enantiomers of ketoprofen were separated to baseline (Rs = 6.44, alpha = 1.76) within a short analysis time. The results indicate that the bio-inversion of R-ketoprofen to the S isomer is significant in equine species. However, considerable differences in pharmacokinetic parameters were observed, indicating large inter-animal variation.
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Affiliation(s)
- H Y Aboul-Enein
- Biological and Medical Research, MBC-03, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
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Abstract
Pharmacokinetic and pharmacodynamic parameters were established for enantiomers of the non-steroidal anti-inflammatory drug (NSAID) ketoprofen (KTP), each administered separately at a dose level of 1.1 mg/kg to a group of six New Forest geldings, in a three-period cross-over study using a tissue cage model of inflammation. For both S(+)-and R(-)-KTP, penetration into tissue cage fluid (transudate) and inflamed tissue cage fluid (exudate) was rapid, and clearances from exudate and transudate were much slower than from plasma. AUC values were, therefore, higher for exudate and, to a lesser degree, transudate than for plasma. Unidirectional chiral inversion of R(-)-to S(+)-KTP was demonstrated. Administration of both enantiomers produced marked, time-dependent inhibition of synthesis of serum thromboxane B2 and exudate prostaglandin E2, indicating non-selective inhibition of cyclo-oxygenase (COX) isoenzymes COX-1 and COX-2 respectively. Administration of both enantiomers also produced partial inhibition of beta-glucuronidase release into inflammatory exudate and of bradykinin-induced skin oedema. It is suggested that, although S(+)-KTP is generally regarded as the eutomer, R(-)-KTP was probably at least as active in inhibiting bradykinin swelling. Pharmacokinetic/pharmacodynamic (PK/PD) modelling of the data could not be undertaken following R(-)-KTP administration because of chiral inversion to S(+)-KTP, but pharmacodynamic parameters, Emax, EC50, N, keO and t1/2(keO). were determined for s(+)-KTP using the sigmoidal Emax equation. PK/DP modelling provided a novel means of comparing and quantifying several biological effects of KTP and of investigating its mechanisms of action.
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Affiliation(s)
- M F Landoni
- Department of Veterinary Basic Sciences, Royal Veterinary College, Hatfield, Herts, UK
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Affiliation(s)
- M F Landoni
- Catedra de Farmacologia, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Argentina
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