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Park SY, Lee HJ, Kim HS, Kim DH, Lee SW, Yoon HY. Anti-Staphylococcal Activity of Ligilactobacillus animalis SWLA-1 and Its Supernatant against Multidrug-Resistant Staphylococcus pseudintermedius in Novel Rat Model of Acute Osteomyelitis. Antibiotics (Basel) 2023; 12:1444. [PMID: 37760740 PMCID: PMC10526016 DOI: 10.3390/antibiotics12091444] [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: 08/23/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Osteomyelitis caused by staphylococcal infection is a serious complication of orthopedic surgery. Staphylococcus pseudintermedius is the main causative agent of osteomyelitis in veterinary medicine. Methicillin-resistant S. pseudintermedius (MRSP) has been reported in companion animals, especially dogs. Multidrug-resistant S. pseudintermedius is an emerging pathogen and has acquired antibiotic resistance against various commercial antimicrobial agents. New antimicrobial compounds are urgently needed to address antibiotic resistance, and the development of novel agents has become an international research hotspot in recent decades. Antimicrobial compounds derived from probiotics, such as bacteriocins, are promising alternatives to classical antibiotics. In this study, the antibacterial activities of Ligilactobacillus animalis SWLA-1 and its concentrated cell-free supernatant (CCFS) were evaluated in vitro and in vivo. The CCFS of this bacterium showed no toxicity against osteoblast and myoblast cells in vitro, while significantly inhibiting the multidrug-resistant S. pseudintermedius KUVM1701GC strain in a newly established rat model. The CCFS significantly inhibited multidrug-resistant staphylococci both in vitro and in vivo. This suggests that CCFS derived from L. animalis SWLA-1 has potential as an alternative to classic antibiotics for staphylococcal infections in dogs.
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Affiliation(s)
- Sung-Yong Park
- Laboratory of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea;
| | - Hong-Jae Lee
- Laboratory of Infectious Diseases and Veterinary Microbiology, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea; (H.-J.L.); (D.-H.K.); (S.-W.L.)
| | - Hyo-Sung Kim
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea;
| | - Dong-Hwi Kim
- Laboratory of Infectious Diseases and Veterinary Microbiology, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea; (H.-J.L.); (D.-H.K.); (S.-W.L.)
| | - Sang-Won Lee
- Laboratory of Infectious Diseases and Veterinary Microbiology, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea; (H.-J.L.); (D.-H.K.); (S.-W.L.)
| | - Hun-Young Yoon
- Laboratory of Veterinary Surgery, College of Veterinary Medicine, Konkuk University, Neungdong-ro 120, Seoul 05029, Republic of Korea;
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Zheng Y, Ye PP, Zhou Y, Wu SY, Liu XT, Du B, Tang BH, Kan M, Nie AQ, Yin R, Wang M, Hao GX, Song LL, Yang XM, Huang X, Su LQ, Wang WQ, van den Anker J, Zhao W. LPS-Induced Inflammation Affects Midazolam Clearance in Juvenile Mice in an Age-Dependent Manner. J Inflamm Res 2021; 14:3697-3706. [PMID: 34377007 PMCID: PMC8349217 DOI: 10.2147/jir.s321492] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/23/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose Inflammation has a significant impact on CYP3A activity. We hypothesized that this effect might be age dependent. Our objective was to conduct a population pharmacokinetic study of midazolam in mice at different developmental stages with varying degrees of inflammation to verify our hypothesis. Methods Different doses (2 and 5 mg/kg) of lipopolysaccharide (LPS) were used to induce different degrees of systemic inflammation in Swiss mice (postnatal age 9–42 days, n = 220). The CYP3A substrate midazolam was selected as the pharmacological probe to study CYP3A activity. Postnatal age, current body weight, serum amyloid A protein 1 (SAA1) levels and LPS doses were collected as covariates to perform a population pharmacokinetic analysis using NONMEM 7.2. Results A population pharmacokinetic model of midazolam in juvenile and adult mice was established. Postnatal age and current body weight were the most significant and positive covariates for clearance and volume of distribution. LPS dosage was the most significant and negative covariate for clearance. LPS dosage can significantly reduce the clearance of midazolam by 21.8% and 38.7% with 2 mg/kg and 5 mg/kg, respectively. Moreover, the magnitude of the reduction was higher in mice with advancing postnatal age. Conclusion Both inflammation and ontogeny have an essential role in CYP3A activity in mice. The effect of LPS-induced systemic inflammation on midazolam clearance in mice is dependent on postnatal age.
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Affiliation(s)
- Yi Zheng
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Pan-Pan Ye
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - Yue Zhou
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Su-Ying Wu
- Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Xi-Ting Liu
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Bin Du
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Bo-Hao Tang
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Min Kan
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Ai-Qing Nie
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Rui Yin
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Meng Wang
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Guo-Xiang Hao
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China
| | - Lin-Lin Song
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - Xin-Mei Yang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - Xin Huang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - Le-Qun Su
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - Wen-Qi Wang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
| | - John van den Anker
- Division of Clinical Pharmacology, Children's National Hospital, Washington, DC, USA.,Departments of Pediatrics, Pharmacology & Physiology, Genomics & Precision Medicine, George Washington University, School of Medicine and Health Sciences, Washington, DC, USA.,Department of Paediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Wei Zhao
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China.,Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, 250014, People's Republic of China
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3
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Ye PP, Zheng Y, Du B, Liu XT, Tang BH, Kan M, Zhou Y, Hao GX, Huang X, Su LQ, Wang WQ, Yu F, Zhao W. First dose in neonates: pharmacokinetic bridging study from juvenile mice to neonates for drugs metabolized by CYP3A. Xenobiotica 2020; 50:1275-1284. [PMID: 32400275 DOI: 10.1080/00498254.2020.1768454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
First dose prediction is challenging in neonates. Our objective in this proof-of-concept study was to perform a pharmacokinetic (PK) bridging study from juvenile mice to neonates for drugs metabolized by CYP3A. We selected midazolam and clindamycin as model drugs. We developed juvenile mice population PK models using NONMEM. The PK parameters of these two drugs in juvenile mice were used to bridge PK parameters in neonates using different correction methods. The bridging results were evaluated by the fold-error of 0.5- to 1.5-fold. Simple allometry with and without a correction factor for maximum lifespan potential could be used for a bridging of clearance (CL) and volume of distribution (Vd), respectively, from juvenile mice to neonates. Simulation results demonstrated that for midazolam, 100% of clinical studies for which both the predictive CL and Vd were within 0.5- to 1.5-fold of the observed. For clindamycin, 75% and 100% of clinical studies for which the predictive CL and Vd were within 0.5- to 1.5-fold of the observed. A PK bridging of drugs metabolized by CYP3A is feasible from juvenile mice to neonates. It could be a complement to the ADE and PBPK models to support the first dose in neonates.
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Affiliation(s)
- Pan-Pan Ye
- Department of Clinical Pharmacy, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China.,Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Yi Zheng
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bin Du
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xi-Ting Liu
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bo-Hao Tang
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Min Kan
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yue Zhou
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Guo-Xiang Hao
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xin Huang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Le-Qun Su
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Wen-Qi Wang
- Clinical Research Center, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Feng Yu
- Department of Clinical Pharmacy, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Wei Zhao
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University, Jinan, China.,Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Clinical Research Center, The First Affiliated Hospital of Shandong First Medical University, Jinan, China.,Department of Pediatrics, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
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Watson MK, Papich MG, Chinnadurai SK. Pharmacokinetics of intravenous clindamycin phosphate in captive Bennett's wallabies (Macropus rufogriseus). J Vet Pharmacol Ther 2017; 40:682-686. [PMID: 28568310 DOI: 10.1111/jvp.12421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 04/24/2017] [Indexed: 12/01/2022]
Abstract
This study was designed to investigate the pharmacokinetics of clindamycin, a lincosamide antibiotic, in Bennett's wallabies. The pharmacokinetic properties of a single intravenous (IV) dose of clindamycin were determined in six wallabies. A single 20-min IV infusion of 20 mg/kg of clindamycin was administered, followed by blood collection prior to, and up to 12 hr after clindamycin administration. Plasma clindamycin concentrations were determined by high-pressure liquid chromatography (HPLC) with ultraviolet (UV) detection. Pharmacokinetic variables were calculated using a two-compartment model with first order elimination which best fit the data. The mean volume of distribution at steady-state, distribution half-life, and elimination half-life were 898.25 ml/kg, 0.16 hr, 1.79 hr, respectively. No adverse effects were noted after IV administration.
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Affiliation(s)
- M K Watson
- Illinois Zoological and Aquatic Animal Medicine Residency Program, Urbana, IL, USA.,Chicago Zoological Society, Brookfield Zoo, Brookfield, IL, USA
| | - M G Papich
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA
| | - S K Chinnadurai
- Chicago Zoological Society, Brookfield Zoo, Brookfield, IL, USA
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Prediction of Antimalarial Drug Clearance in Children: A Comparison of Three Different Interspecies Scaling Methods. Eur J Drug Metab Pharmacokinet 2015; 41:767-775. [DOI: 10.1007/s13318-015-0305-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Interspecies allometric scaling of antimalarial drugs and potential application to pediatric dosing. Antimicrob Agents Chemother 2014; 58:6068-78. [PMID: 25092696 DOI: 10.1128/aac.02538-14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pharmacopeial recommendations for administration of antimalarial drugs are the same weight-based (mg/kg of body weight) doses for children and adults. However, linear calculations are known to underestimate pediatric doses; therefore, interspecies allometric scaling data may have a role in predicting doses in children. We investigated the allometric scaling relationships of antimalarial drugs using data from pharmacokinetic studies in mammalian species. Simple allometry (Y = a × W(b)) was utilized and compared to maximum life span potential (MLP) correction. All drugs showed a strong correlation with clearance (CL) in healthy controls. Insufficient data from malaria-infected species other than humans were available for allometric scaling. The allometric exponents (b) for CL of artesunate, dihydroartemisinin (from intravenous artesunate), artemether, artemisinin, clindamycin, piperaquine, mefloquine, and quinine were 0.71, 0.85, 0.66, 0.83, 0.62, 0.96, 0.52, and 0.40, respectively. Clearance was significantly lower in malaria infection than in healthy (adult) humans for quinine (0.07 versus 0.17 liter/h/kg; P = 0.0002) and dihydroartemisinin (0.81 versus 1.11 liters/h/kg; P = 0.04; power = 0.6). Interpolation of simple allometry provided better estimates of CL for children than MLP correction, which generally underestimated CL values. Pediatric dose calculations based on simple allometric exponents were 10 to 70% higher than pharmacopeial (mg/kg) recommendations. Interpolation of interspecies allometric scaling could provide better estimates than linear scaling of adult to pediatric doses of antimalarial drugs; however, the use of a fixed exponent for CL was not supported in the present study. The variability in allometric exponents for antimalarial drugs also has implications for scaling of fixed-dose combinations.
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7
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Saridomichelakis MN, Athanasiou LV, Chatzis MK, Salame M, Katsoudas V, Pappas IS. Concentrations of clindamycin hydrochloride in homogenates of normal dog skin when administered at two oral dosage regimens. Vet Q 2013; 33:7-12. [PMID: 23445168 DOI: 10.1080/01652176.2013.772315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Clindamycin is frequently used for the treatment of bacterial pyoderma. OBJECTIVE To compare the pharmacokinetics of clindamycin in whole skin homogenates of normal dogs when administered orally at two dosage regimens (5.5 mg/kg BW, twice daily and 11 mg/kg BW, once daily). ANIMALS AND METHODS Skin biopsies were obtained from six laboratory beagles before, 3, 6 and 12 h after the first and the fifth dose of clindamycin at the former regimen, as well as before, 3, 6, 12 and 24 h after the first and third dose at the latter regimen. Tissue was homogenized and clindamycin concentrations were measured by reverse-phase high-performance liquid chromatography coupled with mass spectrometry. Results were analyzed using Student's t-test at a level of significance of 0.05. RESULTS Maximal concentration and area under the concentration-time curve, but not their relevant dose-normalized values, were higher at the dosage regimen of 11 mg/kg BW, once daily than at 5.5 mg/kg BW twice daily. CONCLUSIONS The pharmacokinetic profile of clindamycin is at least equal, if not better, when this antimicrobial is administered at 11 mg/kg BW, once daily.
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Saridomichelakis MN, Athanasiou LV, Salame M, Chatzis MK, Katsoudas V, Pappas IS. Serum pharmacokinetics of clindamycin hydrochloride in normal dogs when administered at two dosage regimens. Vet Dermatol 2011; 22:429-35. [PMID: 21418348 DOI: 10.1111/j.1365-3164.2011.00969.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aim of this cross-over study was to compare clindamycin pharmacokinetics in the serum of clinically normal dogs when administered orally at two dosage regimens (5.5 mg/kg, twice daily, and 11 mg/kg, once daily), separated by a 1 week wash-out period. Serum samples were obtained from six clinically normal laboratory beagles before, 3, 6, 9 and 12 h after the first and fifth dose of clindamycin at 5.5 mg/kg, twice daily, and before, 3, 6, 9, 12, 18 and 24 h after the first and third dose at 11 mg/kg, once daily. Serum clindamycin concentrations were determined by reverse-phase liquid chromatography coupled with mass spectrometry. Results were analysed using Student's paired t-test, at a 5% level of significance. Values of pharmacokinetic parameters that differed significantly between the two dosage regimens included the following: maximal concentration and area under the concentration-time curve were higher at 11 mg/kg, once daily, than at 5.5 mg/kg, twice daily; and, more importantly, the ratio of AUC(0-24) to the minimal inhibitory concentration (MIC) value of 0.5 μg/mL for a 24 h period (AUC(0-24)/MIC) was higher when clindamycin was administered at 11 than at 5.5 mg/kg, at least during the first day of drug administration. Therefore, a better pharmacokinetic profile may be expected when clindamycin is administered at 11 mg/kg, once daily, for the treatment of canine pyoderma caused by Staphylococcus pseudintermedius.
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Affiliation(s)
- Manolis N Saridomichelakis
- Clinic of Medicine and Laboratory of Pharmacology and Toxicology, School of Veterinary Medicine, University of Thessaly, Karditsa, Greece.
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Batzias GC, Delis GA, Athanasiou LV. Clindamycin bioavailability and pharmacokinetics following oral administration of clindamycin hydrochloride capsules in dogs. Vet J 2005; 170:339-45. [PMID: 16266847 DOI: 10.1016/j.tvjl.2004.06.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2004] [Indexed: 11/20/2022]
Abstract
Oral bioavailability and pharmacokinetic behaviour of clindamycin in dogs was investigated following intravenous (IV) and oral (capsules) administration of clindamycin hydrochloride, at the dose of 11 mg/kg BW. The absorption after oral administration was fast, with a mean absorption time (MAT) of 0.87+/-0.40 h, and bioavailability was 72.55+/-9.86%. Total clearance (CL) of clindamycin was low, after both IV and oral administration (0.503+/-0.095 vs. 0.458+/-0.087 L/h/kg). Volume of distribution at steady-state (IV) was 2.48+/-0.48 L/kg, indicating a wide distribution of clindamycin in body fluids and tissues. Elimination half-lives were similar for both routes of administration (4.37+/-1.20 h for IV, vs. 4.37+/-0.73 h for oral). Serum clindamycin concentrations following administration of capsules remained above the MICs of very susceptible microorganisms (0.04-0.5 microg/mL) for 12 or 10 h, respectively. Time above the mean inhibitory concentration (MIC) is considered as the index predicting the efficacy of clindamycin (T(>MIC) must be at least 40-50% of the dosing interval), so a once-daily oral administration of 11 mg/kg BW of clindamycin can be considered therapeutically effective. For less susceptible bacteria (with MICs of 0.5-2 microg/mL) the same dose should be given but twice daily.
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Affiliation(s)
- Georgios C Batzias
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece.
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Barton A, Fuller R, Dudley N. Using subcutaneous fluids to rehydrate older people: current practices and future challenges. QJM 2004; 97:765-8. [PMID: 15496532 DOI: 10.1093/qjmed/hch119] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Barton
- Medical Directorate, Furness General Hospital, Barrow-in-Furness, LA14 4LF.
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11
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Ranheim B, Ween H, Egeli AK, Hormazabal V, Yndestad M, Søli NE. Benzathine penicillin G and procaine penicillin G in piglets: comparison of intramuscular and subcutaneous injection. Vet Res Commun 2003; 26:459-65. [PMID: 12241099 DOI: 10.1023/a:1020590408947] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The disposition of penicillin G in piglets is described after intramuscular or subcutaneous injection of depot preparations. The piglets were injected with 33,000 IU/kg or 100,000 IU/kg benzathine + procaine penicillin G intramuscularly or subcutaneously, or 100,000 IU/kg procaine penicillin G intramuscularly or subcutaneously. Intramuscular injection of benzathine + procaine penicillin resulted in higher maximum concentrations in plasma (Cmax) than did subcutaneous injection. The mean residence time (MRT) of penicillin G was longer when the drugs were injected subcutaneously rather than intramuscularly. The plasma concentration versus time profiles of the subcutaneous injections of benzathine + procaine penicillin revealed secondary peaks, possibly reflecting a certain degree of inflammation at the injection site.
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Affiliation(s)
- B Ranheim
- Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo.
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12
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Lavy E, Ziv G, Shem-Tov M, Glickman A, Dey A. Pharmacokinetics of clindamycin HCl administered intravenously, intramuscularly and subcutaneously to dogs. J Vet Pharmacol Ther 1999; 22:261-5. [PMID: 10499238 DOI: 10.1046/j.1365-2885.1999.00221.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: 11/20/2022]
Abstract
A buffered aqueous solution of clindamycin Hcl (200 mg/mL) was injected intravenously (i.v.) intramuscularly (i.m.) and subcutaneously (s.c.) in a non-randomized, partial cross-over trial involving six male and six female dogs. Blood samples were collected at conventional, predetermined time periods and serum drug concentrations were determined by microbiological assay. Dogs were observed clinically for signs of pain, and activity of serum creatine phosphokinase (CPK) was monitored after i.m. dosing. The i.v. data from five of the dogs best fitted a two-compartment open-system pharmacokinetic model whereas a non-compartment model was most suitable for analysis of the data from the remaining seven dogs. The mean i.v. elimination half-life (t1/2 beta) and the mean residence time (MRT) were 124 and 143 min, respectively. The mean volume of distribution at steady state (Vss) was 0.86 L/kg. Little pain was recorded upon i.m. injection; mean peak serum drug concentration (Cmax) was 4.4 micrograms/mL, the elimination half-life (t1/2el) was 247 min and the calculated bioavailability (F) was 115% of the i.v. dose. Serum CPK activity was elevated to 25-fold the pretreatment level in samples collected 4, 8 and 12 h after i.m. injection. Pain was not recorded after s.c. drug administration; the mean Cmax of 20.8 micrograms/mL was significantly greater than the corresponding value for the i.m. route, and F was 310%. The s.c. route appears to be superior to the i.m. route in terms of local tolerance and serum drug level; a 10 mg/kg SID treatment regimen is suggested for treatment of canine infections due to clindamycin sensitive bacteria.
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Affiliation(s)
- E Lavy
- Koret School of Veterinary Medicine, Hebrew University of Jerusalem, Rehovot, Israel
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