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Wang Y, Sun D, Mei Y, Wu S, Li X, Li S, Wang J, Gao L, Xu H, Tuo Y. Population Pharmacokinetics and Dosing Regimen Optimization of Latamoxef in Chinese Children. Pharmaceutics 2022; 14:1033. [PMID: 35631619 PMCID: PMC9146031 DOI: 10.3390/pharmaceutics14051033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/26/2022] [Accepted: 05/09/2022] [Indexed: 02/04/2023] Open
Abstract
The present study aimed to establish population pharmacokinetic models of latamoxef, as well as its R- and S-epimers, and generate findings to guide the individualized administration of latamoxef in pediatric patients. A total of 145 in-hospital children aged 0.08-10.58 years old were included in this study. Three population pharmacokinetic models of latamoxef and its R- and S-epimers were established. The stability and predictive ability of the final models were evaluated by utilizing goodness-of-fit plots, nonparametric bootstrapping, and normalized prediction distribution errors. The final model of total latamoxef was considered as a basis for the dosing regimen. A two-compartment model with first-order elimination best described the pharmacokinetics of total latamoxef. The population typical values of total latamoxef were as follows: central compartment distribution volume (V1) of 4.84 L, peripheral compartment distribution volume (V2) of 16.18 L, clearance (CL) of 1.00 L/h, and inter-compartmental clearance (Q) of 0.97 L/h. Moreover, R-epimer has a higher apparent volume of distribution and lower clearance than S-epimer. Body surface area (BSA) was identified as the most significant covariate to V, CL, and Q. Specific recommendations are given for dosage adjustment in pediatric patients based on BSA. This study highlights that a BSA-normalized dose of latamoxef was required when treating different bacteria to reach the therapeutic target more effectively.
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Affiliation(s)
- Yang Wang
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Dan Sun
- Department of Neurology, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China;
| | - Yan Mei
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Sanlan Wu
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China;
| | - Xinlin Li
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Sichan Li
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Jun Wang
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Liuliu Gao
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Hua Xu
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
| | - Yali Tuo
- Department of Clinical Pharmacy, Wuhan Children’s Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China; (Y.W.); (Y.M.); (X.L.); (S.L.); (J.W.); (L.G.); (H.X.)
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Taniguchi S, Hamase K, Kinoshita A, Zaitsu K. Simple and rapid analytical method for carbapenems using capillary zone electrophoresis. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1999; 727:219-25. [PMID: 10360441 DOI: 10.1016/s0378-4347(99)00005-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A simple and rapid analytical method for carbapenems using high-performance capillary electrophoresis is described. All therapeutic carbapenem injections in Japan (imipenem, panipenem and meropenem) and four other beta-lactams (piperacillin, cefotiam, cefotaxime, latamoxef) were separated and determined with good repeatability in about 10 min using simple free zone capillary electrophoresis. The electrophoresis buffer was 100 mM phosphate buffer of pH 8.0, and a fused-silica capillary of 25 microm I.D. and 47 cm length was adopted. The present method was successfully applied to monitor the degradation of carbapenems under various conditions (at various temperatures or in coexistence with other drugs prescribed in the case of methicillin-resistant Staphylococcus aureus).
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Affiliation(s)
- S Taniguchi
- Faculty of Pharmaceutical Sciences, Kyushu University, Maidashi, Fukuoka, Japan
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Itoh T, Nakaura H, Koyano S, Tsuda Y, Yamada H. Stereoselective renal secretion of carbenicillin in rabbits: role of the organic anion transporter at the renal brush border membrane. Chirality 1998; 10:349-57. [PMID: 9614690 DOI: 10.1002/(sici)1520-636x(1998)10:4<349::aid-chir10>3.0.co;2-#] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Stereoselectivity in the renal secretion of carbenicillin (CBPC) was studied in rabbits. Significant renal secretion of CBPC was observed in vivo, with the secretion of the S-epimer being greater than that of the R-epimer. Stereoselective transport of CBPC was further studied in vitro using basolateral and brush border membrane vesicles prepared from rabbit kidneys. The transport of CBPC by the organic anion transporter into the basolateral membrane vesicles (BLMV) was not stereoselective. In contrast, a distinct stereoselectivity was observed in the transport of CBPC by the organic anion transporter into the brush border membrane vesicles (BBMV), with the transport of the S-epimer being more favorable. Significant epimer-epimer interactions were also observed in the transport into BBMV. The stereoselectivity of the transport of CBPC was calculated from the kinetic parameters with consideration of epimer-epimer interactions and was similar to that observed in vivo. It was concluded that the observed stereoselectivity in the renal secretion of CBPC in vivo reflected that of transport via the organic anion transporter located at the brush border membrane.
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Affiliation(s)
- T Itoh
- Department of Pharmacokinetics and Biopharmaceutics, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
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Itoh T, Watanabe N, Ishida M, Tsuda Y, Koyano S, Tsunoi T, Shimada H, Yamada H. Stereoselective disposition of sulbenicillin in humans. Antimicrob Agents Chemother 1998; 42:325-31. [PMID: 9527780 PMCID: PMC105408 DOI: 10.1128/aac.42.2.325] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Stereoselective disposition of sulbenicillin (SBPC) epimers in healthy human volunteers was studied in order to clarify the differences in pharmacokinetic behavior between the epimers. Stereospecific high-performance liquid chromatography was used for the determination of SBPC epimers. Plasma protein binding was measured in vitro with an ultrafiltration method. The binding was stereoselective, with the unbound fraction (fu) of the R-epimer being approximately 1.3-fold greater than that of the S-epimer. SBPC was administered intravenously to human volunteers, and concentrations of SBPC in plasma and urinary excretion rates were measured. Renal clearance (CLR) for the unbound drug (approximately 400 ml/min) was greater than the glomerular filtration rate (GFR) (approximately 109 ml/min) for both epimers, suggesting that both epimers are secreted at the renal tubules. Renal tubular secretion appeared to be greater for the S-epimer. When probenecid was coadministered, the CLR values of both epimers were significantly reduced and were approximately equal to the GFR values. CLR was greater for the S-epimer (37.5 and 49.8 ml/min for R-SBPC and S-SBPC, respectively), which was simply due to the greater fu of the S-epimer in plasma. In contrast, total body clearance was greater for the R-epimer (67.8 and 56.3 ml/min for R-SBPC and S-SBPC, respectively) because of the stereoselective degradation of the R-epimer in plasma. It was revealed that stereoselective degradation in the body had significant influence on the disposition of SBPC epimers.
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Affiliation(s)
- T Itoh
- Department of Pharmacokinetics and Biopharmaceutics, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
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Itoh T, Yamada H. Diastereomeric beta-lactam antibiotics. Analytical methods, isomerization and stereoselective pharmacokinetics. J Chromatogr A 1995; 694:195-208. [PMID: 7719465 DOI: 10.1016/0021-9673(94)00932-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Stereospecific HPLC methods for the determination of various diastereomeric beta-lactam antibiotics are reviewed. Stereoselectivity in the absorption, distribution and excretion of several diastereomeric beta-lactams is summarized. The isomerization of beta-lactam isomers and its influence on the pharmacokinetics and pharmacodynamics are discussed.
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Affiliation(s)
- T Itoh
- Department of Pharmacokinetics and Biopharmaceutics, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
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Ishida M, Tsuda Y, Onuki Y, Itoh T, Shimada H, Yamada H. Determination of carbenicillin epimers in plasma and urine with high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY 1994; 652:43-9. [PMID: 8014226 DOI: 10.1016/0378-4347(93)e0378-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A high-performance liquid chromatographic method was developed for determining the concentrations of carbenicillin (CBPC) epimers in plasma and urine. Samples were prepared for HPLC analysis by solid-phase extraction and the concentrations of CBPC epimers were determined using reversed-phase HPLC with a mixture of 0.05 M ammonium acetate and methanol as a mobile phase. Baseline separation of the two epimers was observed for both plasma and urine samples with a detection limit of ca. 10 micrograms/ml. No peaks interfering with either of the CBPC epimers were observed on the HPLC chromatograms for blank plasma and urine. The presented method was used to determine the protein binding of CBPC epimers in vitro in human and rabbit plasma. The stereoselectivity of the binding of CBPC appeared to be reversed in human and rabbit plasma.
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Affiliation(s)
- M Ishida
- Department of Pharmacokinetics and Biopharmaceutics, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
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Kelly JW, Stewart JT. Separation of Selected Beta Lactam Antibiotic Epimers on Gamma Cyclodextrin, Ion Exchange Ethylvinylbenzene/Divinylbenzene/Copolymer and Poly(Styrene-Divinylbenzene) Copolymer Stationary Phases. ACTA ACUST UNITED AC 1991. [DOI: 10.1080/01483919108049687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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