CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients

ABSTRACT Voriconazole (VRCZ) is a triazole antifungal agent with a broad antifungal spectrum. It is metabolized by hepatic cytochrome P450 (CYP) isozyme CYP2C19, whose genetic polymorphism causes significant variability in drug efficacy and safety. Poor metabolizer alleles of CYP2C19 are more common...

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Main Authors: Yoshiki Katada, Daiki Hira, Keisuke Umemura, Yurie Katsube, Hiroki Ishimura, Yusuke Kojima, Machiko Hirai, Moto Kajiwara, Mitsuhiro Sugimoto, Hiroki Endo, Junru Cao, Saki Ohta, Kinuka Kotani, Sakiko Hatazoe, Masahiro Tsuda, Shunsaku Nakagawa, Koh Shinohara, Yasuhiro Tsuchido, Miki Nagao, Tomohiro Terada
Format: Article
Language:English
Published: Wiley 2025-08-01
Series:Clinical and Translational Science
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Online Access:https://doi.org/10.1111/cts.70317
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author Yoshiki Katada
Daiki Hira
Keisuke Umemura
Yurie Katsube
Hiroki Ishimura
Yusuke Kojima
Machiko Hirai
Moto Kajiwara
Mitsuhiro Sugimoto
Hiroki Endo
Junru Cao
Saki Ohta
Kinuka Kotani
Sakiko Hatazoe
Masahiro Tsuda
Shunsaku Nakagawa
Koh Shinohara
Yasuhiro Tsuchido
Miki Nagao
Tomohiro Terada
author_facet Yoshiki Katada
Daiki Hira
Keisuke Umemura
Yurie Katsube
Hiroki Ishimura
Yusuke Kojima
Machiko Hirai
Moto Kajiwara
Mitsuhiro Sugimoto
Hiroki Endo
Junru Cao
Saki Ohta
Kinuka Kotani
Sakiko Hatazoe
Masahiro Tsuda
Shunsaku Nakagawa
Koh Shinohara
Yasuhiro Tsuchido
Miki Nagao
Tomohiro Terada
author_sort Yoshiki Katada
collection DOAJ
description ABSTRACT Voriconazole (VRCZ) is a triazole antifungal agent with a broad antifungal spectrum. It is metabolized by hepatic cytochrome P450 (CYP) isozyme CYP2C19, whose genetic polymorphism causes significant variability in drug efficacy and safety. Poor metabolizer alleles of CYP2C19 are more common in Asian populations, increasing the risk of supratherapeutic VRCZ levels. We have developed a novel nomogram based on CYP2C19 genetic polymorphisms. This study aimed to evaluate whether CYP2C19 genotype‐guided VRCZ therapy reduces toxicity in Japanese patients. This retrospective study included 64 patients (genotype‐guided group, n = 26; comparison group, n = 38). The primary outcome was defined as the composite incidence of adverse events commonly observed with VRCZ, represented by the combined occurrence of grade ≥ 2 hepatotoxicity and visual symptoms. Secondary outcomes included the proportion of patients maintaining VRCZ trough concentrations within the therapeutic range (1–4 μg/mL) and the treatment response at 28 days. The composite incidence of adverse events was significantly lower in the genotype‐guided group than in the comparison group (p = 0.003). VRCZ discontinuation due to adverse events occurred in nine patients (23.7%) in the comparison group and one (3.8%) in the genotype‐guided group (p = 0.039). More patients in the genotype‐guided group were achieved through concentrations within the therapeutic range at the initial sampling point. However, treatment response rates did not differ significantly between the groups. VRCZ administration based on CYP2C19 genotyping improved therapeutic trough levels management and reduced adverse effects while maintaining therapeutic efficacy. These findings highlight the importance of CYP2C19 genotyping for VRCZ treatment in Japanese patients.
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spelling doaj-art-27b2d9ac002c46e898b629b9dcf848df2025-08-23T17:10:42ZengWileyClinical and Translational Science1752-80541752-80622025-08-01188n/an/a10.1111/cts.70317CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese PatientsYoshiki Katada0Daiki Hira1Keisuke Umemura2Yurie Katsube3Hiroki Ishimura4Yusuke Kojima5Machiko Hirai6Moto Kajiwara7Mitsuhiro Sugimoto8Hiroki Endo9Junru Cao10Saki Ohta11Kinuka Kotani12Sakiko Hatazoe13Masahiro Tsuda14Shunsaku Nakagawa15Koh Shinohara16Yasuhiro Tsuchido17Miki Nagao18Tomohiro Terada19Department of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanDepartment of Infection Control and Prevention Kyoto University Hospital Kyoto JapanDepartment of Infection Control and Prevention Kyoto University Hospital Kyoto JapanDepartment of Infection Control and Prevention Kyoto University Hospital Kyoto JapanDepartment of Clinical Pharmacology and Therapeutics Kyoto University Hospital Kyoto JapanABSTRACT Voriconazole (VRCZ) is a triazole antifungal agent with a broad antifungal spectrum. It is metabolized by hepatic cytochrome P450 (CYP) isozyme CYP2C19, whose genetic polymorphism causes significant variability in drug efficacy and safety. Poor metabolizer alleles of CYP2C19 are more common in Asian populations, increasing the risk of supratherapeutic VRCZ levels. We have developed a novel nomogram based on CYP2C19 genetic polymorphisms. This study aimed to evaluate whether CYP2C19 genotype‐guided VRCZ therapy reduces toxicity in Japanese patients. This retrospective study included 64 patients (genotype‐guided group, n = 26; comparison group, n = 38). The primary outcome was defined as the composite incidence of adverse events commonly observed with VRCZ, represented by the combined occurrence of grade ≥ 2 hepatotoxicity and visual symptoms. Secondary outcomes included the proportion of patients maintaining VRCZ trough concentrations within the therapeutic range (1–4 μg/mL) and the treatment response at 28 days. The composite incidence of adverse events was significantly lower in the genotype‐guided group than in the comparison group (p = 0.003). VRCZ discontinuation due to adverse events occurred in nine patients (23.7%) in the comparison group and one (3.8%) in the genotype‐guided group (p = 0.039). More patients in the genotype‐guided group were achieved through concentrations within the therapeutic range at the initial sampling point. However, treatment response rates did not differ significantly between the groups. VRCZ administration based on CYP2C19 genotyping improved therapeutic trough levels management and reduced adverse effects while maintaining therapeutic efficacy. These findings highlight the importance of CYP2C19 genotyping for VRCZ treatment in Japanese patients.https://doi.org/10.1111/cts.70317CYP2C19genotype‐guidedpharmacogenomicsprecision medicinetherapeutic drug monitoringvoriconazole
spellingShingle Yoshiki Katada
Daiki Hira
Keisuke Umemura
Yurie Katsube
Hiroki Ishimura
Yusuke Kojima
Machiko Hirai
Moto Kajiwara
Mitsuhiro Sugimoto
Hiroki Endo
Junru Cao
Saki Ohta
Kinuka Kotani
Sakiko Hatazoe
Masahiro Tsuda
Shunsaku Nakagawa
Koh Shinohara
Yasuhiro Tsuchido
Miki Nagao
Tomohiro Terada
CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
Clinical and Translational Science
CYP2C19
genotype‐guided
pharmacogenomics
precision medicine
therapeutic drug monitoring
voriconazole
title CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
title_full CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
title_fullStr CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
title_full_unstemmed CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
title_short CYP2C19‐Guided Voriconazole Therapy: A Precision Medicine Approach to Mitigate Adverse Effects in Japanese Patients
title_sort cyp2c19 guided voriconazole therapy a precision medicine approach to mitigate adverse effects in japanese patients
topic CYP2C19
genotype‐guided
pharmacogenomics
precision medicine
therapeutic drug monitoring
voriconazole
url https://doi.org/10.1111/cts.70317
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