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YU TW, YAMAMOTO H, MORITA S, FUKUSHIMA R, ELBADAWY M, USUI T, SASAKI K. Comparative pharmacokinetics of tyrosine kinase inhibitor, lapatinib, in dogs and cats following single oral administration. J Vet Med Sci 2024; 86:317-321. [PMID: 38281758 PMCID: PMC10963087 DOI: 10.1292/jvms.23-0448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 01/09/2024] [Indexed: 01/30/2024] Open
Abstract
Lapatinib is an orally administered tyrosine kinase inhibitor used to treat human epidermal growth factor receptor 2 (HER2) -overexpressing breast cancers in humans. Recently, the potential of lapatinib treatment against canine urothelial carcinoma or feline mammary tumor was investigated. However, the pharmacokinetic studies of lapatinib in dogs and cats are not well-defined. In the present study, the pharmacokinetic characteristics of lapatinib in both cats and dogs after a single oral administration at a dose of 25 mg/kg were compared with each other. Lapatinib was administered orally to four female laboratory cats and four female beagle dogs. Blood samples were collected over time, and the plasma lapatinib concentrations were analyzed by HPLC. Following a single dose of 25 mg/kg, the averaged maximum plasma concentration (Cmax) of lapatinib in cats was 0.47 μg/mL and achieved at 7.1 hr post-administration, while the Cmax in dogs was 1.63 μg/mL and achieved at 9.5 hr post-administration. The mean elimination half-life was 6.5 hr in cats and 7.8 hr in dogs. The average area under the plasma concentration-time curve of dogs (37.2 hr·μg/mL) was significantly higher than that of cats (7.97 hr·μg/mL). These results exhibited slow absorptions of lapatinib in both animals after oral administration. The Cmax observed in cats was significantly lower and the half-life was shorter than those observed in dogs. Based on these results, a larger dose or shorter dosing intervals might be recommended in cats to achieve similar plasma concentration as dogs.
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Affiliation(s)
- Ting-Wei YU
- Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Haru YAMAMOTO
- Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Shohei MORITA
- Animal Emergency Medical Center, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Ryuji FUKUSHIMA
- Animal Emergency Medical Center, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Mohamed ELBADAWY
- Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
- Department of Pharmacology, Faculty of Veterinary Medicine, Benha University, Elqaliobiya, Egypt
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Tatsuya USUI
- Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Kazuaki SASAKI
- Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
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FUKUSHIMA R, TANAKA R, SUZUKI S, HAMABE R, MACHIDA N, NAKAO S, SAIDA Y, TAKASHIMA K, MATSUMOTO H, KOYAMA H, HIROSE H, YAMANE Y. Epidemiological and Morphological Studies of Double-Chambered Right Ventricle in Dogs. J Vet Med Sci 2011; 73:1287-93. [DOI: 10.1292/jvms.10-0485] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Ryuji FUKUSHIMA
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Ryou TANAKA
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Shuji SUZUKI
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Rina HAMABE
- Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Noboru MACHIDA
- Department of Veterinary Clinical Oncology, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Shu NAKAO
- Department of Veterinary Clinical Oncology, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | | | | | - Hirotaka MATSUMOTO
- Department of Veterinary Internal Medicine, Faculty of Veterinary, Nippon Veterinary and Life Science University
| | - Hidekazu KOYAMA
- Department of Veterinary Internal Medicine, Faculty of Veterinary, Nippon Veterinary and Life Science University
| | - Hisashi HIROSE
- Department of Veterinary Internal Medicine, Faculty of Veterinary, Nippon Veterinary and Life Science University
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OSHITANI N, KITANO A, OBAYASHI M, TABATA A, FUKUSHIMA R, OKABE H, KASHIMA K, NAKAMURA S, OBATA A, MATSUMOTO T, OKAWA K, KOBAYASHI K. A Study on Atypical Endoscopic Findings of Ulcerative Colitis: Longitudinal Ulcers, Mucosal Bridges and Red Spots. Dig Endosc 2007. [DOI: 10.1111/j.1443-1661.1991.tb00274.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Nobuhide OSHITANI
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Atsuo KITANO
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Makoto OBAYASHI
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Akihiro TABATA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Ryuji FUKUSHIMA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Hiromu OKABE
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Kazutoshi KASHIMA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Shiro NAKAMURA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Akishige OBATA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Takayuki MATSUMOTO
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Kiyotaka OKAWA
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
| | - Kenzo KOBAYASHI
- Third Department of Internal Medicine, Osaka City University Medical School, Osaka, Japan
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