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Iwano M, Sadahiro K, Maruo T, Kawarai S, Kayanuma H, Orito K. Serum concentration and safety of intravenous drip versus subcutaneous administration of carboplatin in dogs. J Vet Med Sci 2021; 83:775-779. [PMID: 33716231 PMCID: PMC8182319 DOI: 10.1292/jvms.20-0653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Carboplatin is used to treat certain cancers in dogs and cats and is routinely administered via intravenous drip (IVD). Subcutaneous (SC) administration has
also been described. However, the toxicity, serum concentrations, and area under blood concentration-time curves (AUCs) of SC carboplatin are unknown. This
study aimed to compare serum carboplatin concentrations in dogs after SC and IVD and to monitor any adverse events. In this crossover study, five dogs received
SC or IV carboplatin (300 mg/m2). After a minimum of 3 weeks, each dog received the other treatment. No gross skin toxicity or abnormal clinical
signs were observed in any of the dogs. Blood test abnormalities were detected in most dogs. Decreased neutrophil and platelet counts, and increased C-reactive
protein (CRP) levels were found. There was no significant difference in the neutropenia, thrombocytopenia, and CRP scores between the groups. Systemic
toxicities of SC carboplatin were comparable to those of IVD carboplatin. The time to maximum carboplatin concentration after SC was longer than that after IVD
(P<0.001). SC carboplatin remained in the serum longer than IVD carboplatin (P=0.008). The AUC of SC was less than that
of IVD (P=0.002). The AUC and time taken to reach the maximum concentration of SC carboplatin were lower than those of IVD carboplatin. This
study suggests that SC carboplatin may be an efficacious option for the treatment of tumors in dogs, particularly where IVD administration is challenging.
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Affiliation(s)
- Masataka Iwano
- Veterinary Teaching Hospital, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
| | - Kohei Sadahiro
- Laboratory of Veterinary Physiology II, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
| | - Takuya Maruo
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
| | - Shinpei Kawarai
- Veterinary Teaching Hospital, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
| | - Hideki Kayanuma
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
| | - Kensuke Orito
- Laboratory of Veterinary Physiology II, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5201, Japan
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