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Completed

NCT Number: NCT05869643

A Clinical Trial of STP0404 in Adults With HIV-1 Infection

The purpose of this study is to evaluate the antiviral effect, safety, tolerability, and pharmacokinetics of STP0404 in adult participants living with Human Immunodeficiency Virus Type 1 (HIV-1) infection.

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Key information

Conditions

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Kaiser Permenente Los Angeles Medical Center, Los Angeles, California, United States

Loading trial locations.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Have a confirmed HIV-1 infection in the documented medical record or at screening.
  • Have never received any ARTs (i.e., treatment-naïve) before screening or only received one ARV regimen (2 or 3 drugs) at least 12 weeks before screening and/or received any monotherapy ≤10 days in a clinical trial setting at least 12 weeks before screening. Participants with a documented history of PrEP and/or PEP therapy but discontinued at least 8 weeks prior to screening are also eligible for inclusion.
  • Have a CD4+ cell count ≥200 cells/mm3 at screening.

Exclusion criteria

  • Have a hepatitis B surface antigen or positive hepatitis C virus antibody at screening. An HCV confirmation (HCV RNA test) will be performed at a central laboratory if the HCV antibodies screening result is positive. If the HCV RNA test result is negative, the participant will be eligible.
  • Have a positive drug screen for amphetamines, barbiturates, cocaine, opiates, benzodiazepines, heroin, or phencyclidine. However, if in the opinion of the investigator, positive drug screen results may be due to prescription medication for therapeutic purposes (e.g., prescription Adderall for ADHD), eligibility decision shall rely on the investigator's medical judgment and should be documented.
  • Have a history of regular alcohol consumption, defined as an average weekly intake of >14 drinks (males) or >7 drinks (females), within 6 months of screening and/or has positive alcohol screen at screening and baseline.
  • Have received the following treatments as PrEP or PEP (≥1 dose) prior to screening: monoclonal antibodies, HIV-1 maturation inhibitors, and long-acting INSTIs (such as cabotegravir).
  • Pregnant or lactating females.
  • Have a history of clinically relevant pancreatitis or hepatitis within the previous 6 months.
  • Participant received any allosteric HIV-1 integrase inhibitor (ALLINI, ≥1 dose) and/or received any long-acting ARVs (marketed or investigational, ≥1 dose) prior to screening.
  • Have previously failed an INSTIs-containing regimen.

Treatment and study plan

Low-dose STP0404 (Pirmitegravir)

Drug

Once daily, oral capsule taken after breakfast

Medium-dose STP0404 (Pirmitegravir)

Drug

Once daily, oral capsule taken after breakfast

High-dose STP0404 (Pirmitegravir)

Drug

Once daily, oral capsule taken after breakfast

Placebo

Drug

Matching placebo capsule, taken orally once daily after breakfast

Primary outcomes

  1. HIV-1 RNA copies change in plasma

    Time frame: Day 1, Day 11

    Change in plasma HIV-1 RNA log10 copies from baseline to Day 11 following a 10-day treatment period at each dose level.

  2. Total Number of Adverse Events (AEs) occurring through Day 11

    Time frame: Through day 11

    Cumulative number of AEs occurring from Day 1 through Day 11 at each dose level and placebo in treatment-naïve adults with HIV-1 infection, regardless of treatment discontinuation, and use of prohibited medications. The severity of the AE will be rated as per the Division of AIDS (DAIDS) Table for Grading the Severity of Adult and Pediatric Adverse Events Corrected Version 2.1, July 2017. These will be descriptively summarized.

  3. Total Number of Serious Adverse Events (SAEs) occurring through Day 11

    Time frame: Through day 11

    Cumulative number of SAEs occurring from Day 1 through Day 11 at each dose level and placebo in treatment-naïve adults with HIV-1 infection, regardless of treatment discontinuation, use of prohibited medications, and death are included in the endpoint. These will be descriptively summarized.

  4. Mean area under the concentration-time curve from zero to 24 hours (AUC0-24h)

    Time frame: Day 1, Day 10

  5. Mean observed maximum concentration after administration (Cmax)

    Time frame: Day 1, Day 10

  6. Mean time to reach Cmax (Tmax)

    Time frame: Day 1, Day 10

  7. Mean observed concentration at 24 hours after administration (C24h)

    Time frame: Day 2, Day 4, Day 7, Day10, Day 11

  8. Mean area under the concentration-time curve to infinite time (AUCinf)

    Time frame: Day 10

  9. Mean area under the concentration-time curve to time t (AUCt)

    Time frame: Day 10

  10. Mean terminal half-life (t1/2)

    Time frame: Day 10

  11. Mean apparent oral clearance (CL/F)

    Time frame: Day 10

  12. Mean apparent volume of distribution (Vd/F)

    Time frame: Day 10

Secondary outcomes

  1. HIV-1 RNA copies change in plasma from baseline to post-dose timepoints

    Time frame: Day 1, Day 2, Day 4, Day 7, Day 10, Day 11

  2. HIV-1 RNA change in plasma from baseline to nadir over 11 days.

    Time frame: Day 1 pre-dose, Day 11

  3. Plasma HIV-1 RNA rate of decline over 11 days

    Time frame: Day 1, Day 2, Day 4, Day 7, Day 10, Day 11

  4. Number of participants with HIV-1 RNA <400 copies/mL

    Time frame: Day 1, Day 2, Day 4, Day 7, Day 10, Day 11

    descriptive statistics.

  5. Number of participants with HIV-1 RNA <50 copies/mL

    Time frame: Day 1, Day 2, Day 4, Day 7, Day 10, Day 11

  6. CD4+ cell count change

    Time frame: Day 1, Day 11

  7. STP0404 exposure-efficacy relationship in plasma HIV-1 RNA copies / CD4+ cell count

    Time frame: Day 1, Day 11

  8. Emergence of drug resistance mutations.

    Time frame: Screening, Day 1, Day 4, Day 7, Day 11

Sponsors and collaborators

Lead sponsor

ST Pharm Co., Ltd.

Industry

Registry information

Official study title

A Phase 2a, Randomized, Double-Blinded, Placebo-Controlled, Multicenter Study to Investigate the Antiviral Effect, Safety, Tolerability, and Pharmacokinetics of STP0404 in Adults With HIV-1 Infection

Important dates

Study start
2023
Primary completion
2026
Study completion
2026
First posted
May 22, 2023
Registry last updated
May 8, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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