JNJ-56136379, an HBV Capsid Assembly Modulator, Is Well-Tolerated and Has Antiviral Activity in a Phase 1 Study of Patients With Chronic Infection.

Abstract:

BACKGROUND & AIMS:JNJ-56136379 (JNJ-6379), a capsid assembly modulator that blocks hepatitis B virus (HBV) replication, was well tolerated and demonstrated dose-proportional pharmacokinetics in healthy participants in part 1 of its first clinical trial. In part 2, we have evaluated the safety, pharmacokinetics, and antiviral activity of multiple doses of JNJ-6379 in patients with chronic HBV infection. METHODS:We performed a double-blind study of 57 treatment-naïve patients with HB e antigen-positive or -negative (74%) chronic HBV infection without cirrhosis. Patients were randomly assigned to groups given JNJ-6379 at 25 mg (100 mg loading dose), 75 mg, 150 mg, or 250 mg or placebo daily for 4 weeks with an 8-week follow-up period. RESULTS:Twenty-three (56%) of 41 patients given JNJ-6379 had at least 1 adverse event (AE) during treatment, compared with 10 (63%) of 16 patients given placebo. No serious AEs were reported during the treatment period. Three patients (7%) given JNJ-6379 vs none given placebo had grade 3 AEs; of these, 1 patient (150 mg) also had an isolated grade 4 increase in the level of alanine aminotransferase that led to treatment discontinuation. JNJ-6379 exposure increased with dose, with time-linear pharmacokinetics. HBV-DNA and HBV-RNA decreased from baseline in patients receiving all doses of JNJ-6379, independently of viral genotype and HB e antigen status. On day 29, 13 (32%) of 41 patients had levels of HBV DNA below the lower limit of quantification. No clinically significant changes in levels of HB surface antigen were observed. CONCLUSIONS:In a phase 1 study of treatment-naïve patients with chronic HBV infection, all doses tested of JNJ-6379 were well tolerated, showed dose-dependent pharmacokinetics, and had potent antiviral activity in patients with CHB. The findings support a phase 2a study to evaluate JNJ-6379 ± nucleos(t)ide analogs in patients with chronic HBV infection, which is under way. ClinicalTrials.gov identifier: NCT02662712.

journal_name

Gastroenterology

journal_title

Gastroenterology

authors

Zoulim F,Lenz O,Vandenbossche JJ,Talloen W,Verbinnen T,Moscalu I,Streinu-Cercel A,Bourgeois S,Buti M,Crespo J,Manuel Pascasio J,Sarrazin C,Vanwolleghem T,Shukla U,Fry J,Yogaratnam JZ

doi

10.1053/j.gastro.2020.04.036

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

521-533.e9

issue

2

eissn

0016-5085

issn

1528-0012

pii

S0016-5085(20)30519-9

journal_volume

159

pub_type

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