Pharmacokinetics of Cabotegravir in Subjects with Moderate Hepatic Impairment

Author:

Shaik Jafar Sadik1,Ford Susan2,Lou Yu2,Zhang Zhiping2,Bakshi Kalpana3,Tenorio Allan4,Trezza Christine4,Spreen William4,Patel Parul4

Affiliation:

1. GlaxoSmithKline, Upper Merion, Pennsylvania

2. PAREXEL International, Durham, North Carolina

3. GlaxoSmithKline, Collegeville, Pennsylvania

4. ViiV Healthcare, Research Triangle Park, North Carolina

Abstract

Abstract Background Cabotegravir (CAB) is an integrase inhibitor in phase 3 clinical trials for the treatment and prevention of HIV. CAB undergoes hepatic metabolism primarily via UGT1A1; thus hepatic impairment has the potential to affect CAB exposure. Methods This was a multi-center, single-dose, open-label, parallel group study to evaluate the effect of moderate hepatic impairment on the pharmacokinetics (PK) and safety of CAB. Adults with moderate hepatic impairment as determined by Child-Pugh classification score of 7–9 (n = 8) and matched healthy control subjects (n = 8) were enrolled. Control subjects were matched for gender, age (±10 years), and body mass index (BMI) (±25%). Subjects received oral CAB 30 mg as a single dose in the fasted state followed by serial PK sampling for 168 hours. CAB unbound concentrations at 2 and 24 hours after dosing were determined by equilibrium dialysis. Non-compartmental PK analysis was performed; geometric least squares (GLS) mean ratios (hepatic impaired group/control group) and 90% confidence intervals (CI) were generated. Results Sixteen subjects completed study; 12 (75%) male, mean age 59 years (range: 51–67), mean BMI 29 kg/m2 (range: 21–37), and total Child Pugh score in range of 7–9. CAB PK parameters were similar between subjects with moderate hepatic impairment and matched healthy subjects. The GLS mean ratios (90% CI) for AUC(0-∞), Cmax, C24, CL/F, and t1/2 were 0.73 (0.50, 1.06), 0.69 (0.51, 0.93), 0.73 (0.53, 1.02), 1.38 (0.95, 2.01), and 0.82 (0.65, 1.04), respectively. Although highly protein bound, the unbound fraction of CAB was increased in subjects with moderate hepatic impairment relative to healthy subjects with GLS mean ratio (90%CI) of 2.14 (1.57, 2.90) at 2 hours post dose and 1.90 (1.14, 3.18) at 24 hours post dose; this was associated with lower serum albumin concentrations and was not considered clinically significant. All adverse events (AE) were reported as mild (Grade 1) to moderate (Grade 2) in severity and no serious AEs were reported. Conclusion Plasma exposures of CAB in subjects with moderate hepatic impairment were similar to those in healthy subjects. No dose adjustment of CAB is required for subjects with mild to moderate hepatic impairment. Disclosures J. S. Shaik, GlaxoSmithKline: Employee and Shareholder, Salary; S. Ford, PAREXEL International: Employee, Salary; Y. Lou, PAREXEL International: Employee, Salary; Z. Zhang, PAREXEL International: Employee, Salary; K. Bakshi, GlaxoSmithKline: Employee and Shareholder, Salary; A. Tenorio, ViiV Healthcare: Employee and Shareholder, Salary; C. Trezza, ViiV Healthcare: Employee and Shareholder, Salary; W. Spreen, ViiV Healthcare: Employee and Shareholder, Salary; P. Patel, ViiV Healthcare: Employee and Shareholder, Salary

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Oncology

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Cabotegravir;Current Opinion in HIV and AIDS;2018-07

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