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Study of Oral TLR8 Agonist Selgantolimod on HBsAg in Participants With Both Chronic Hepatitis B and HIV

CompletedPhase 2

Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

Conditions: Hepatitis B, HIV Infections

Interventions: Selgantolimod, Placebo

Countries: United States, Brazil, Peru, Thailand

The study aims to assess safety and tolerability of oral toll-like receptor (TLR) 8 agonist Selgantolimod (SLGN) administered for 24 weeks in participants with both CHB and HIV who have been receiving suppressive antiviral therapy for both viruses for ≥5 years and have qHBsAg level \>1000 (3 log10) IU/mL at screening. The study will also evaluate if TLR8 stimulation with SLGN will reduce hepatitis B surface antigen (HBsAg) titers in the blood.

Eligibility overview

Sex: ALL

Age: 18 Years to 70 Years

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Inclusion Criteria:

1. HIV-1 infection
2. Effective antiviral therapy for HIV (ART) and HBV that includes TDF, TAF, TDF/FTC, TDF/3TC (tenofovir disoproxil fumarate plus lamivudine), TAF/FTC, or entecavir (ETV), for ≥5 years immediately prior to study entry. ART is defined as including a minimum of two anti-HIV antivirals.
3. CD4+ cell count ≥350 cells/mm3
4. HIV-1 RNA \<50 copies/mL measured on at least two occasions at least 12 weeks apart, with no documented value \>200 copies/mL, over the 12 months prior to study entry.
5. Positive or negative HBeAg
6. Negative anti-HDV
7. Current CHB infection
8. HBV DNA level \<50 IU/mL measured on at least two occasions at least 12 weeks apart, with no documented value ≥50 IU/mL, over the 12 months prior to study entry.
9. Quantitative HBsAg \>1000 IU/mL
10. Hepatitis C virus (HCV) antibody negative, or if the participant is HCV antibody positive, an undetectable HCV RNA.
11. Participants age ≥18 years and ≤70 years at study entry
12. Participants must agree to stay on an effective antiviral therapy for HIV (ART) and HBV throughout the study.

Exclusion Criteria:

1. Receipt of treatment for HCV within 24 weeks prior to study entry
2. Evidence of advanced fibrosis or cirrhosis (Metavir ≥F3 or equivalent).
3. Current or prior history of clinical hepatic decompensation (e.g., ascites, encephalopathy, or variceal hemorrhage)
4. History of HCC or cholangiocarcinoma
5. Malignancy within 5 years prior to study entry. NOTE: A history of non-melanoma skin cancer (e.g., basal cell carcinoma or squamous cell skin cancer) is not exclusionary.
6. History of solid organ transplantation
7. Presence of any active or acute AIDS-defining opportunistic infections within 60 days prior to study entry
8. History of uveitis or posterior synechiae
9. Breastfeeding

Locations (12)

San Diego, California, United States
Atlanta, Georgia, United States
New York, New York, United States
Greensboro, North Carolina, United States
Cincinnati, Ohio, United States
Cleveland, Ohio, United States
Pittsburgh, Pennsylvania, United States
Porto Alegre, Rio Grande do Sul, Brazil
Rio de Janeiro, Brazil
Lima, Peru
Pathum Wan, Bangkok, Thailand
Chiang Mai, Thailand