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GS-12
Ascending dose cohort study of inarigivir - A novel RIG I agonist in
chronic HBV patients: Final results of the ACHIEVE trial
Man-Fung Yuen1, Chi-Yi Chen2, Chun-Jen Liu3, RachelWen-Juei Jeng4,
Magdy Elkhashab5, Carla Coffin6, Won Kim7, Susan Greenbloom8,
Alnoor Ramji9, Young-Suk Lim10, Yoon Jun Kim11, Scott Fung12,
Dong Joon Kim13, JeongWon Jang14, Kwan Sik Lee15, Nezam Afdhal16,
Radhakrishnan Iyer16, Chelsea Macfarlane16, Kathy Jackson17,
Stephen Locarnini17, Henry Chan18. 1University of Hong Kong, Queen
Marys Hospital, Hong Kong, Hong Kong; 2Chia-Yi Christian Hospital,
Chia-Yi City, Taiwan; 3National Taiwan University Hospital, Taipei,
Taiwan; 4Chang Gung Memorial Hospital, New Taipei City, Taiwan;
5Toronto Liver Centre, Toronto, Canada; 6University of Calgary, Calgary,
Canada; 7Borame Medical Center, Seoul, Korea, Rep. of South; 8Toronto
Digestive Disease Associates, Vaughn, Canada; 9Gastrointestinal
Institute, Vancouver; 10University of Ulsan College of Medicine, Asan
Medical Center, Seoul, Korea, Rep. of South; 11Seoul National University
Hospital, Seoul, Korea, Rep. of South; 12Toronto General Hospital, United
Health Network, Toronto, Canada; 13Hallym University Chuncheon
Sacred Heart Hospital, Seoul, Korea, Rep. of South; 14The Catholic
University of Korea, Seoul St. Mary’s Hospital, Seoul, Korea, Rep. of South;
15Gangnam Severance Hospital, Yonsei University Health System, Seoul,
Korea, Dem. People’s Rep. of; 16Spring Bank Pharmaceuticals, Hopkinton,
United States; 17VIDRL, Melbourne, Australia; 18Chinese University of
Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
Email: [email protected]
Background and Aims: Inarigivir, an oral dinucleotide RIG-I agonist
has demonstrated anti-viral activity against HBV via a combination of
activation of innate immunity and a DAA effect as a Non Nucleotide
reverse transcriptase inhibitor (NNRTI). We report here the final
results of the ACHIEVE trial, an ascending dose cohort study of 12
weeks of inarigivir followed by a switch to 12 weeks of tenofovir
(TDF) 300 mg daily in treatment naïve HBV patients.
Method: 80 patients were randomized to inarigivir (25,50,100 and
200 mg) daily or placebo in a 4:1 ratio for 12 weeks and then all
patients were switched to TDF. Primary endpoints were safety and
efficacy measured by reduction in HBV DNA atweek 12 from baseline.
Secondary endpoints included HBV RNA, quantitative HBsAg,
peripheral serum cytokines and change in ALT.
Results: Patient demographics are given in the table. Primary
endpoint of HBV DNA reduction was achieved in a dose dependent
fashion for both HBeAg positive and negative patients with a
maximal reduction of 3.26 log10 in the 200 mg dose. HBV RNA
paralleled HBV DNA reductions, with greater reduction in HBeAgnegative patients. Quantitative HBsAg response with a predefined
threshold of a >0.5 log10 reduction at either week 12 or week 24 was
seen in 22% of patients with a mean reduction of 0.8 log10 and a
maximal reduction of 1.4 log10. Unlike HBV DNA, HBsAg decline was
not dose dependent and indicates the potential importance of the
host response to inarigivir. Tolerability of treatment was good with 1
unrelated SAE of knee pain and 1 grade 3 non-sustained laboratory
abnormality of hypertriglyceridemia. ALT flares (>200 IU) were seen
in 6 treated patients (10%) and 4 placebo patients (25%) and 1 patient
required dose discontinuation for ALT > 400 IU. No significant
increases in bilirubin or INR were seen.
Pbo E+ ve,Pbo E− ve,Epos 25mg, Eneg 25mg,Epos 50mg,Eneg 50mg,Epos 100mg,Eneg 100mg,Epos 200 mg,Eneg200mg
n 8 8 9 7 11 5 13 4 8 7
Age 35 48 37 43 36 47 34 46 42 52
M: F 7:1 5: 3 5:5 3:3 9:2 5:0 7:6 3:1 4:4 2:5
ALT 85 53 82 75 75 65 75 90 54 73
HBVDNA 7.6 4 4.75 7.86 5.69 7.79 4.55 8.20 5.95 7.88 4.95
GTA ,1,, 1
GTB 2 6 4 3 3 4 4 3 2 5
GTC 6 1 5 1 7 1 8 1 6 2
GTD ,,,2 ,1 ,,1
Conclusion: The ACHIEVE trial confirms the safety and anti-viral
efficacy of inarigivir up to 200 mg daily and further studies at doses of
up to 400 mg daily in combination with TDF or added to NUC
suppressed patients are underway.
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