Safety and Efficacy of GS-4774 in Combination With Tenofovir Disoproxil Fumarate (TDF) for the Treatment of Participants With Chronic Hepatitis B (CHB) and Who Are Currently Not on Treatment

Summary

The primary objectives of this study are to evaluate the safety, tolerability, and efficacy of GS-4774 in adults with CHB and who are currently not on treatment. Participants will be randomized to receive TDF alone or GS-4774 plus TDF for 20 weeks. After Week 20, GS-4774 will be discontinued. All participants will continue on TDF and will be followed for an additional 28 weeks. Following completion of the 48 week study period, all participants will be eligible for a treatment extension for 96 weeks.

Timeline

Start

2014-07-24

Primary completion

2016-02-17

Completion

2018-05-30

Outcome

Missed primary endpoint

registry analysis (superiority test); TDF 48 Weeks vs TDF + GS-4774 2 YU; p = 0.805 NCT02174276 ↗

paper GS-4774 was safe and well tolerated but did not produce significant decreases in levels of HBsAg. PMID 30930022 ↗

Publications

• Results Janssen HL, Yoon SK, Yoshida EM, Trinh HN, Rodell TC, Nguyen AH, et al. Safety and Efficacy of GS-4774 in combination with TDF in Patients with Chronic Hepatitis B not on Antiviral Medication [Abstract 231]. Hepatology AASLD Abstracts 2016;64 (Suppl S1):122A.
• Results Boni C, Janssen HLA, Rossi M, Yoon SK, Vecchi A, Barili V, Yoshida EM, Trinh H, Rodell TC, Laccabue D, Alfieri A, Brillo F, Fisicaro P, Acerbi G, Pedrazzi G, Andreone P, Cursaro C, Margotti M, Santoro R, Piazzolla V, Brunetto MR, Coco B, Cavallone D, Zhao Y, Joshi A, Woo J, Lau AH, Gaggar A, Subramanian GM, Massetto B, Fung S, Ahn SH, Ma X, Mangia A, Ferrari C. Combined GS-4774 and Tenofovir Therapy Can Improve HBV-Specific T-Cell Responses in Patients With Chronic Hepatitis. Gastroenterology. 2019 Jul;157(1):227-241.e7. doi: 10.1053/j.gastro.2019.03.044. Epub 2019 Mar 28.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	GS-4774	Vaccine	2 unknown	Subcutaneous
Subject	GS-4774	Vaccine	10 unknown	Subcutaneous
Subject	GS-4774	Vaccine	40 unknown	Subcutaneous
Background	Tenofovir disoproxil fumarate	Small molecule	300 mg	Oral

Indications