2023 Fiscal Year Final Research Report
Impact of changes in intestinal flora by antibiotics on safety and efficacy of CYP3A4 substance agents
Project/Area Number |
19K16443
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 47060:Clinical pharmacy-related
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Research Institution | Hamamatsu University School of Medicine |
Principal Investigator |
Yagi Tatsuya 浜松医科大学, 医学部附属病院, 副薬剤部長 (70719575)
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Project Period (FY) |
2020-03-01 – 2024-03-31
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Keywords | 抗菌薬 / 腸内フローラ / CYP3A4 / 薬物間相互作用 |
Outline of Final Research Achievements |
Antibiotic treatments may, due to a potential drug-drug interaction via changes in the intestinal flora, increase the concentration of any concomitantly administered direct oral anticoagulants (DOACs). DOACs are metabolized in the liver by CYP3A4, and thereby may increase the risk of bleeding events. We conducted a cohort study that included DOAC users using information from Swedish national registers. We compared the incidence of bleeding events associated with use of fluoroquinolones. Cox regression was used to calculate crude and adjusted hazard ratios (aHRs) in time windows of various lengths of follow-up after the start of antibiotic use. The aHR (95%CI) for use of fluoroquinolones ranged from 1.15 (0.79-1.66) at 60 days to 1.34 (0.98-1.81) at 150 days. With regard to fluoroquinolones, we suggest that the risk of bleeding when combined with DOACs, if any, is small, however, the results must be interpreted with caution.
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Free Research Field |
臨床薬理
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Academic Significance and Societal Importance of the Research Achievements |
これまで、ヒトにおいて、抗菌薬投与による腸管フローラの変動を介した薬物代謝酵素への影響を評価した研究や併用薬の有効性、有害作用発現への影響に関する研究は実施されていなかった。本課題では、データベースを用いて臨床薬学的な観点から抗菌薬投与が及ぼすCYP3A4代謝薬剤の安全性への影響を評価した。得られた結果は、抗菌薬の併用をはじめとする腸内フローラの変化による薬剤の有害作用の発現の低減などにつながる臨床上有用な知見を提供する研究になり得る。さらには、世界的に取り組まれている薬物耐性アクションプランとして推進されている「不要な抗菌薬の投与の削減および薬剤耐性菌発現防止」の一助にもつながる。
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