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Imdusiran

Phase 2

Chronic Hepatitis B | Small molecule | Infectious Disease |Arbutus Biopharma Corporation|Last Updated: Sep 11, 2025

Target and mechanism

Target class-Siran (Sirna)
ModalitySmall molecule

Also known as Imdusiran (AB-729)

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment10

FDA Designations

FAST_TRACK

Clinical trial landscape

Imdusiran · 1 trial · 1 indication

Phase 2 1
NCT06154278Intrahepatic and Peripheral Responses to Imdusiran (AB-729) in Chronic Hepatitis BChronic Hepatitis B
RECRUITING10 Analytics
PHASE2RECRUITING
Intrahepatic and Peripheral Responses to Imdusiran (AB-729) in Chronic Hepatitis B
Chronic Hepatitis BUnlock trial analytics

Study Endpoints

Primary Endpoints

Intrahepatic concentration of Imdusiran (AB-729)
During intervention (with first dose of Imdusiran) and after intervention (8 weeks after last dose of Imdusiran)

Intrahepatic drug concentration at day 0 (peak) and week 32 (trough)

Secondary Endpoints

Effect of Imdusiran (AB-729) on hepatitis B surface antigen production
Baseline through study completion, an average of 1 year
Effect of Imdusiran (AB-729) on hepatitis B surface antibody levels
Baseline through study completion, an average of 1 year
Effect of Imdusiran (AB-729) on hepatitis B virus RNA
Baseline through study completion, an average of 1 year
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
Imdusiran (AB-729)EXPERIMENTALParticipants receive subcutaneous injections of 60mg, one injection every 8 weeks for 4 doses.

Interventions

NameTypeDescription
Imdusiran (AB-729)DRUG60mg subcutaneously, every 8 weeks, for a total of 4 doses
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: 1. Provision of signed and dated informed consent form 2. Stated willingness to comply with all study procedures and availability for the duration of the study 3. Male or female, over 18 years of age on the date of screening 4. In good general health as evidenced by medical hist...

Countries:United States
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Frequently asked questions about Imdusiran

What is Imdusiran used for?

Imdusiran is an investigational small molecule being developed for the treatment of chronic Hepatitis B. It is currently in Phase 2 clinical development and has received Fast Track designation from the FDA. The drug is being studied in patients with chronic Hepatitis B.

What does Imdusiran target?

Imdusiran is a small interfering RNA (siRNA) agent. It is designed to target and silence specific genes involved in the Hepatitis B virus life cycle. By using RNA interference, Imdusiran aims to reduce viral protein production and potentially achieve a functional cure for chronic Hepatitis B.

Who is developing Imdusiran?

Imdusiran is being developed by Arbutus Biopharma Corporation, a biopharmaceutical company traded on the NASDAQ under the ticker symbol ABUS. The company is focused on developing therapies for Hepatitis B and other infectious diseases.

What phase is Imdusiran in?

Imdusiran is currently in Phase 2 clinical development. It is an investigational drug and has not yet been approved by the FDA. The drug has received Fast Track designation, which is intended to expedite the development and review of therapies for serious conditions.

What clinical trials is Imdusiran in?

Imdusiran is being evaluated in a Phase 2 clinical trial with the identifier NCT06154278. This study is titled 'Intrahepatic and Peripheral Responses to Imdusiran (AB-729) in Chronic Hepatitis B' and is currently recruiting participants in the United States. The trial is an uncontrolled, open-label study enrolling approximately 10 adult patients.

Is Imdusiran the same as AB-729?

Yes, Imdusiran is also known as AB-729. The drug is referred to by both names in clinical research and development contexts. The ongoing Phase 2 trial NCT06154278 uses both names in its official title, confirming that Imdusiran and AB-729 refer to the same investigational agent.