PMID- 34033139 OWN - NLM STAT- MEDLINE DCOM- 20220411 LR - 20220531 IS - 1365-2125 (Electronic) IS - 0306-5251 (Linking) VI - 88 IP - 1 DP - 2022 Jan TI - The impact of rifampicin on the pharmacokinetics of fuzuloparib in healthy Chinese male volunteers. PG - 84-90 LID - 10.1111/bcp.14926 [doi] AB - AIMS: This clinical study was conducted to evaluate the impact of rifampicin on the pharmacokinetics of fuzuloparib. METHODS: In this single-centre, single-arm, open-label, fixed-sequence study, healthy male subjects took a single 50 mg dose of fuzuloparib on two separate occasions: the first was on Day 1 as monotherapy, and the second was on Day 12 after oral administration of rifampicin 600 mg once daily for 8 days. Series of blood samples were obtained before and after fuzuloparib administration at different time points: pre-dose, and 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 24, 36, 48 and 72 hours post-dose. All samples were examined using liquid chromatography with tandem mass spectrometry. PK parameters were estimated by using a non-compartmental method with Phoenix WinNonlin software. Safety was assessed by monitoring for changes in vital signs and laboratory tests, physical examinations, and incidences of adverse events (AEs). RESULTS: A total of 16 Chinese male subjects were enrolled. Of these, 16 and 15 cases were evaluable for PK analysis following administration with fuzuloparib alone and pretreatment with rifampicin, respectively. Pretreatment with rifampicin resulted in a statistically significant reduction in the systemic exposure to fuzuloparib. The treatment ratio and 90% confidence intervals (CIs) for AUC(0-infinity) and C(max) were 0.10 (0.095-0.115) and 0.32 (0.281-0.365), respectively. A single administration of fuzuloparib after multiple oral dosing of rifampicin was well-tolerated, without severe AEs. CONCLUSION: The exposure of fuzuloparib was dramatically decreased when pretreated with rifampicin. Strong CYP3A4 inducers should be avoided during fuzuloparib treatment. CI - (c) 2021 British Pharmacological Society. FAU - Zhang, Qiao AU - Zhang Q AUID- ORCID: 0000-0001-5821-7999 AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. FAU - Kai, Jiejing AU - Kai J AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. FAU - Zhai, You AU - Zhai Y AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. FAU - Xu, Nana AU - Xu N AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. FAU - Shentu, Jianzhong AU - Shentu J AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. FAU - Zhang, Yanyan AU - Zhang Y AD - Clinical Pharmacology Department, Jiangsu Hengrui Medicine Co. LTD., 1288 Haike Road, Pudong, Shanghai, China. FAU - Liang, Yanjuan AU - Liang Y AD - Clinical Operations Department, Jiangsu Hengrui Medicine Co. LTD., 1288 Haike Road, Pudong, Shanghai, China. FAU - Wang, Yuya AU - Wang Y AD - Clinical Pharmacology Department, Jiangsu Hengrui Medicine Co. LTD., 1288 Haike Road, Pudong, Shanghai, China. FAU - Wu, Lihua AU - Wu L AD - Research Center for Clinical Pharmacy, Zhejiang Provincial Key Laboratory for Drug Evaluation and Clinical Research, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, Hangzhou, China. AD - Shulan (Hangzhou) Hospital Affiliated to Zhejiang Shuren University, Shulan International Medical College, Zhejiang, Hangzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20211226 PL - England TA - Br J Clin Pharmacol JT - British journal of clinical pharmacology JID - 7503323 RN - 0 (Cytochrome P-450 CYP3A Inducers) RN - VJT6J7R4TR (Rifampin) SB - IM MH - Area Under Curve MH - China MH - Cross-Over Studies MH - *Cytochrome P-450 CYP3A Inducers/adverse effects MH - Drug Interactions MH - Healthy Volunteers MH - Humans MH - Male MH - *Rifampin/adverse effects OTO - NOTNLM OT - CYP3A4 OT - PARP inhibitor OT - drug interaction OT - fuzuloparib OT - pharmacokinetics OT - rifampicin EDAT- 2021/05/26 06:00 MHDA- 2022/04/12 06:00 CRDT- 2021/05/25 14:09 PHST- 2021/04/26 00:00 [revised] PHST- 2021/01/04 00:00 [received] PHST- 2021/05/06 00:00 [accepted] PHST- 2021/05/26 06:00 [pubmed] PHST- 2022/04/12 06:00 [medline] PHST- 2021/05/25 14:09 [entrez] AID - 10.1111/bcp.14926 [doi] PST - ppublish SO - Br J Clin Pharmacol. 2022 Jan;88(1):84-90. doi: 10.1111/bcp.14926. Epub 2021 Dec 26.