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New HIV drug shows promise in small trial for Drug-Resistant patients
NCT ID NCT03902522
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This trial tested an injectable drug called PRO 140 (Leronlimab) in 6 people with HIV who had developed resistance to standard medications. The goal was to see if adding PRO 140 to their current failing therapy could reduce the amount of virus in their blood. The study lasted 25 weeks and also looked at safety and tolerability.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- PRO 140 (Leronlimab) - an injectable drug that blocks HIV from entering cells
- What this could lead to
- If successful, this could provide a new treatment option for people with HIV who have developed resistance to standard antiretroviral drugs.
- What could go wrong
- This is a very small early-phase trial with only 6 participants, so results may not apply broadly. The drug is tested alongside failing therapy, and long-term safety and efficacy are not yet established.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2/3
Runs two stages together: whether the treatment works, then large-scale confirmation.
- Participants
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6 people
The number who actually took part.
- Started
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Jun 2018
- Finished
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May 2020
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Males and females, age ≥18 years 2. Exclusive CCR5-tropic virus at Screening Visit as determined by Monogram Biosciences Trofile® Assay 3. Have a history of at least 3 months on current antiretroviral regimen 4. 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. 5. 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 6. 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 7. Laboratory values at Screening of: 1. Absolute neutrophil count (ANC) ≥750/mm3 2. Hemoglobin (Hb) ≥10.5 gm/dL (male) or ≥ 9.5 gm/dL (female) 3. Platelets ≥75,000 /mm3 4. Serum alanine transaminase (SGPT/ALT) \<5 x upper limit of normal (ULN) 5. Serum aspartate transaminase (SGOT/AST) \<5 x ULN 6. 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 7. Creatinine ≤1.5 x ULN 8. Clinically normal resting 12-lead ECG at Screening Visit or, if abnormal, considered not clinically significant by the Principal Investigator 9. 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 10. 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 Exclusion Criteria: 1. Documented CXCR4-tropic virus or Dual/Mixed tropic (R5X4) virus as determined by HIV-1 tropism assay 2. 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) 3. 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 4. 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 5. Females who are pregnant, lactating, or breastfeeding, or who plan to become pregnant during the study 6. Unexplained fever or clinically significant illness within 1 week prior to the first study dose 7. Any vaccination within 2 weeks prior to the first study dose 8. Subjects weighing \< 35kg 9. History of anaphylaxis to oral or parenteral drugs 10. History of Bleeding Disorder or patients on anti-coagulant therapy 11. Participation in an experimental drug trial(s) within 30 days of the Screening Visit 12. Any known allergy or antibodies to the study drug or excipients 13. Treatment with any of the following: 1. Radiation or cytotoxic chemotherapy with 30 days prior to the screening visit 2. Immunosuppressants within 60 days prior to the screening visit 3. Immunomodulating agents (e.g., interleukins, interferons), hydroxyurea, or foscarnet within 60 days prior to the screening visit 4. 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 14. Any other clinical condition that, in the Investigator's judgment, would potentially compromise study compliance or the ability to evaluate safety/efficacy
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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CD02_OpenLabel Investigational Site
Palm Springs, California, 92262, United States
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CD02_OpenLabel Investigational Site
San Francisco, California, 94115, United States
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CD02_OpenLabel Investigational Site
New Haven, Connecticut, 06510, United States
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CD02_OpenLabel Investigational Site
Ft. Pierce, Florida, 34982, United States
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CD02_OpenLabel Investigational Site
Miami, Florida, 33136, United States
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CD02_OpenLabel Investigational Site
Miami, Florida, 33139, United States
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CD02_OpenLabel Investigational Site
Miami, Florida, 33169, United States
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CD02_OpenLabel Investigational Site
Orlando, Florida, 32803, United States
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CD02_OpenLabel Investigational Site
West Palm Beach, Florida, 33401, United States
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CD02_OpenLabel Investigational Site
Decatur, Georgia, 30033, United States
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CD02_OpenLabel Investigational Site
Chicago, Illinois, 60613, United States
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CD02_OpenLabel Investigational Site
Wichita, Kansas, 67214, United States
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CD02_OpenLabel Investigational Site
Syracuse, New York, 13210, United States
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CD02_OpenLabel Investigational Site
Bellaire, Texas, 77301, United States
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CD02_OpenLabel Investigational Site
Houston, Texas, 77004, United States
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CD02_OpenLabel Investigational Site
Houston, Texas, 77098, United States
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CD02_OpenLabel Investigational Site
Spokane, Washington, 99202, United States
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