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HIV-1-infectionPhase 2/3NCT03902522

PRO 140 in Treatment-Experienced HIV-1 Subjects

A Phase 2/3 study testing PRO 140 in people with HIV-1-infection, run by CytoDyn, Inc. at 17 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The primary objectives of the trial are to assess the efficacy, clinical safety and tolerability parameters of PRO 140 in combination with failing ART (antiretroviral therapy) during the initial one-week treatment period, and in combination with Optimized Background Therapy during the subsequent 24-week treatment… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
HIV-1-infection
What is being tested?
PRO 140
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
6 participants
Where
17 sitesUnited States
Study dates
25 Jun 2018to 18 May 2020
Phase
Phase 2/3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Males and females, age ≥18 years
  • Exclusive CCR5-tropic virus at Screening Visit as determined by Monogram Biosciences Trofile® Assay
  • Have a history of at least 3 months on current antiretroviral regimen
  • Treatment-experienced HIV-infected patients with documented genotypic or phenotypic resistance to at least one ART drug within three drug classes OR Treatment-experienced HIV-infected patients with documented genotypic or phenotypic resistance to at least one ART drug within two drug classes and have limited treatment option. The options may be limited as a result of drug antiviral class cross-resistance, documented treatment intolerance, documented objective assessments such as renal or hepatic insufficiency (e.g. high creatinine at baseline, limiting treatment options due to potential for toxicity), past adverse reactions such as hypersensitivity reactions or neuropsychiatric issues that could limit use of currently approved drugs.
  • Be willing to remain on treatment without any changes or additions to the OBT regimen, except for toxicity management or upon meeting criteria for treatment failure
  • Plasma HIV-1 RNA ≥ 400 copies/mL at Screening Visit as determined by Human Immunodeficiency Virus 1 (HIV-1) Quantitative, RNA (Roche Taqman® Real-Time PCR) and documented detectable viral load (HIV-1 RNA >50 copies/ml) within the last 3 months prior to Screening Visit
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  • Laboratory values at Screening of:
  • Absolute neutrophil count (ANC) ≥750/mm3
  • Hemoglobin (Hb) ≥10.5 gm/dL (male) or ≥ 9.5 gm/dL (female)
  • Platelets ≥75,000 /mm3
  • Serum alanine transaminase (SGPT/ALT) <5 x upper limit of normal (ULN)
  • Serum aspartate transaminase (SGOT/AST) <5 x ULN
  • Bilirubin (total) <2.5 x ULN unless Gilbert's disease is present or subject is receiving atazanavir in the absence of other evidence of significant liver disease
  • Creatinine ≤1.5 x ULN
  • Clinically normal resting 12-lead ECG at Screening Visit or, if abnormal, considered not clinically significant by the Principal Investigator
  • Both male and female patients and their partners of childbearing potential must agree to use 2 medically accepted methods of contraception (e.g., barrier contraceptives [male condom, female condom, or diaphragm with a spermicidal gel], hormonal contraceptives [implants, injectables, combination oral contraceptives, transdermal patches, or contraceptive rings], and intrauterine devices) during the course of the study (excluding women who are not of childbearing potential and men who have been sterilized). Females of childbearing potential must have a negative serum pregnancy test at Screening visit and negative urine pregnancy test prior to receiving the first dose of study drug
  • Willing and able to participate in all aspects of the study, including use of SC medication, completion of subjective evaluations, attendance at scheduled clinic visits, and compliance with all protocol requirements as evidenced by providing written informed consent Note: Subjects diagnosed with either substance dependence or substance abuse or any history of a concomitant condition (e.g., medical, psychologic, or psychiatric) may be enrolled if in the opinion of site investigator these circumstances would not interfere with the subject's successful completion of the study requirements

Who cannot join

  • Documented CXCR4-tropic virus or Dual/Mixed tropic (R5X4) virus as determined by HIV-1 tropism assay
  • Patients with no viable treatment options ( i.e., no fully active antiretroviral drug available which can be effectively combined to form a viable new OBT)
  • Any active infection or malignancy requiring acute therapy (with the exception of local cutaneous Kaposi's sarcoma) Note: Subjects infected by the hepatitis B virus or hepatitis C virus will be eligible for the study if they have no signs of hepatic decompensation and meet the liver function tests eligibility criteria
  • Laboratory test values of ≥ grade 3 DAIDS (Division of Acquired Immune Deficiency Syndrome) laboratory abnormality with the exception of the absolute CD4+ count criterion of <200/mm3
  • Females who are pregnant, lactating, or breastfeeding, or who plan to become pregnant during the study
  • Unexplained fever or clinically significant illness within 1 week prior to the first study dose
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  • Any vaccination within 2 weeks prior to the first study dose
  • Subjects weighing < 35kg
  • History of anaphylaxis to oral or parenteral drugs
  • History of Bleeding Disorder or patients on anti-coagulant therapy
  • Participation in an experimental drug trial(s) within 30 days of the Screening Visit
  • Any known allergy or antibodies to the study drug or excipients
  • Treatment with any of the following:
  • Radiation or cytotoxic chemotherapy with 30 days prior to the screening visit
  • Immunosuppressants within 60 days prior to the screening visit
  • Immunomodulating agents (e.g., interleukins, interferons), hydroxyurea, or foscarnet within 60 days prior to the screening visit
  • Oral or parenteral corticosteroids within 30 days prior to the Screening Visit. Subjects on chronic steroid therapy >5 mg/day will be excluded with the following exception:
  • Subjects on inhaled, nasal, or topical steroids will not be excluded
  • Any other clinical condition that, in the Investigator's judgment, would potentially compromise study compliance or the ability to evaluate safety/efficacy

Trial locations and contacts

17 sites in 1 country.

17 sites in 1 country

United States17 sites
  • CD02_OpenLabel Investigational Site

    Bellaire, Texas, 77301

  • CD02_OpenLabel Investigational Site

    Chicago, Illinois, 60613

  • CD02_OpenLabel Investigational Site

    Decatur, Georgia, 30033

  • CD02_OpenLabel Investigational Site

    Ft. Pierce, Florida, 34982

  • CD02_OpenLabel Investigational Site

    Houston, Texas, 77004

  • CD02_OpenLabel Investigational Site

    Houston, Texas, 77098

  • CD02_OpenLabel Investigational Site

    Miami, Florida, 33136

  • CD02_OpenLabel Investigational Site

    Miami, Florida, 33139

  • CD02_OpenLabel Investigational Site

    Miami, Florida, 33169

  • CD02_OpenLabel Investigational Site

    New Haven, Connecticut, 06510

  • CD02_OpenLabel Investigational Site

    Orlando, Florida, 32803

  • CD02_OpenLabel Investigational Site

    Palm Springs, California, 92262

  • CD02_OpenLabel Investigational Site

    San Francisco, California, 94115

  • CD02_OpenLabel Investigational Site

    Spokane, Washington, 99202

  • CD02_OpenLabel Investigational Site

    Syracuse, New York, 13210

  • CD02_OpenLabel Investigational Site

    West Palm Beach, Florida, 33401

  • CD02_OpenLabel Investigational Site

    Wichita, Kansas, 67214

Other trials in United States

About this study

Official title: A Multi-center, Two-Part, Single-Arm, Open Label, 25-Week Trial With PRO 140 in Treatment-Experienced HIV-1 Subjects

The primary objectives of the trial are to assess the efficacy, clinical safety and tolerability parameters of PRO 140 in combination with failing ART (antiretroviral therapy) during the initial one-week treatment period, and in combination with Optimized Background Therapy during the subsequent 24-week treatment period.

Read the detailed description

PRO 140, in combination with other antiretroviral agents, is indicated for treatment experienced adult HIV-1 patients infected with CCR5-tropic virus (virus that uses the chemokine receptor type 5 to enter the cell). These patients must demonstrate evidence of HIV-1 replication despite ongoing antiretroviral therapy and have documented genotypic or phenotypic resistance to at least one ART drug within three drug classes (or within two or more drug classes with limited treatment option). The options may be limited as a result of drug antiviral class cross-resistance, documented treatment intolerance, documented objective assessments such as renal or hepatic insufficiency (e.g. high creatinine at baseline, limiting treatment options due to potential for toxicity), past adverse reactions such as hypersensitivity reactions or neuropsychiatric issues that could limit use of currently approved drugs. Study population includes treatment-experienced HIV-infected patients with CCR5-tropic virus who demonstrates evidence of HIV-1 replication despite ongoing antiretroviral therapy with documented genotypic or phenotypic resistance to ART drugs within three drug classes (or within two drug classes with limited treatment option). The primary objectives of the trial are to assess the efficacy, clinical safety and tolerability parameters of PRO 140 in combination with failing ART during the initial one-week treatment period, and in combination with Optimized Background Therapy during the subsequent 24-week treatment period.

Conditions
HIV-1-infection
Being tested
PRO 140

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • PRO 140Drug

    Also called Leronlimab

    2 injections of PRO 140 (2 X 2 mL/inj.) Subjects who were previously enrolled and receiving 350 mg dose had the option to move to the 700mg dose for the remainder of the trial.

Study groups in NCT03902522
Study groupRoleWhat they receive
Leronlimab (PRO 140)ExperimentalSubjects will be on existing ART for one week followed by PRO 140 700 mg weekly subcutaneous (SC) Inj. + existing ART for the next week. Subsequently, all subjects will enter the 24-week single-arm, open-label treatment period. During this period, all subjects will receive PRO 140 SC injection and Optimized Background Therapy.
Receives: Drug: PRO 140

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Proportion of Participants With ≥ 0.5 log10 Reduction in HIV-1 RNA Viral Load From Baseline at the End of the Initial 1-week Treatment Period

    The primary endpoint for this study is the proportion of participants with a ≥ 0.5 log10 reduction in HIV-1 RNA viral load from baseline to the end of the initial 1-week treatment period.

    Measured: 1-week from baseline to the end of the initial PRO 140 and ART treatment period

Secondary outcomes (7)
  1. Proportion of Participants With ≥ 1 log10 Reduction in HIV-1 RNA Viral Load From Baseline at the End of the Initial 1-week Treatment Period

    The secondary endpoint is the proportion of participants with ≥ 1 log10 reduction in HIV-1 RNA viral load from baseline at the end of the initial 1-week treatment period

    Measured: 1-week from baseline to the end of the initial PRO 140 and ART treatment period

  2. Mean Change From Baseline in HIV-1 RNA Levels (log10 Copies/mL) at the End of the Initial 1-week Treatment Period

    The secondary endpoint is the mean change between baseline and the end of the 1-week of treatment period in HIV-1 RNA levels (log10 copies/mL) (baseline was T1, mean change was calculated between time points T1 and T2).

    If the mean change is a negative value, this indicates a reduction in viral load.

    Measured: 1-week from baseline to the end of the initial PRO 140 and ART treatment period

  3. Percentage of Participants Achieving HIV-1 RNA < 400 Copies/mL at Week 25

    The secondary endpoint is the percentage of participants achieving HIV-1 RNA < 400 copies/mL at week 25

    Measured: 25 weeks post-initiation of PRO 140 and existing ART treatment

  4. Percentage of Participants Achieving HIV-1 RNA < 50 Copies/mL at Week 25

    The secondary outcome measure is the percentage of participants achieving HIV-1 RNA < 50 copies/mL at week 25

    Measured: 25 weeks post-initiation of PRO 140 and existing ART treatment

  5. Mean Change From Baseline in HIV-1 RNA Levels (log10 Copies/mL)

    The secondary outcome measure is the mean change in HIV-1 RNA levels (log10 copies/mL) between Baseline (T1) and week 25 (T25). Baseline was T1, mean change was calculated between time points T1 and T25.

    If the mean change is a negative value, this indicates a reduction in viral load.

    Measured: 25 weeks post-initiation of PRO 140 and existing ART treatment

  6. Mean Change From Baseline in CD4 Cell Count at the End of the Initial 1-week Treatment Period

    The secondary outcome measure is the mean change in CD4 cell count between Baseline and the end of the initial 1-week treatment period (T2). Baseline was T1, mean change was calculated between time points T1 and T2.

    Measured: 1-week post-initiation of PRO 140 and ART treatment.

  7. Mean Change From Baseline in CD4 Cell Count at Week 23

    The secondary outcome measure is the mean change in CD4 cell count between Baseline (T1) and week 23 (T23)

    Measured: 23 weeks post-initiation of PRO 140 and existing ART treatment

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted4 Apr 2019
  2. Study start25 Jun 2018
  3. Primary completion18 May 2020
  4. Study completion18 May 2020

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2/3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
6 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03902522
Sponsor's protocol ID
PRO 140_CD02_OpenLabel
Status last verified
Aug 2025
First submitted
2 Apr 2019
Last updated
16 Sep 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2/3 study testing PRO 140 in people with HIV-1-infection, run by CytoDyn, Inc. at 17 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 17 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 16 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 17 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 16 Sep 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Proportion of Participants With ≥ 0.5 log10 Reduction in HIV-1 RNA Viral Load From Baseline at the End of the Initial 1-week Treatment Period (time frame: 1-week from baseline to the end of the initial PRO 140 and ART treatment period). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Sep 2025.

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