Clinical trial NCT03787095: Safety and Immunotherapeutic Activity of an Anti-PD-1 Antibody (Cemiplimab) in Participants With HIV-1 on Suppressive cART
Official title: Safety and Immunotherapeutic Activity of an Anti-PD-1 Antibody (Cemiplimab) in Participants With HIV-1 on Suppressive cART: A Phase I/II, Double-blind, Placebo-controlled, Ascending Multiple Dose Study
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE1
PHASE2
Conditions: HIV Infections
Lead sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
Sponsor class: NIH
Collaborators: name: Regeneron Pharmaceuticals
First posted: 2018-12-26
Enrollment: 5
Sex: ALL
Minimum age (years): 18
Maximum age (years): 64
Standard ages: ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: SEQUENTIAL
Primary purpose: TREATMENT

Brief summary: The purpose of this study was to evaluate the safety and immunotherapeutic activity of an anti-PD-1 antibody (cemiplimab) in participants with HIV-1 on suppressive combination antiretroviral therapy (cART).

Detailed description: This study evaluated the safety and immunotherapeutic activity of an anti-PD-1 antibody (cemiplimab) in participants with HIV-1 on combination antiretroviral therapy (cART) who have plasma less than the quantification limit of an FDA-approved assay and CD4+ T cell counts ≥350/mm\^3.

Participants were planned to be enrolled into three sequential dose-rising cohorts. Participants in each cohort received infusions of either cemiplimab or placebo, with planned administration at study entry (Day 0) and Week 6, for a total of two infusions. All participants continued their non-study provided ART regimen. Enrollment in the second and third cohorts would only open after all participants in the previous cohort had reached week 12 and an evaluation of safety outcomes established that it is safe to dose escalate.

Participants had screening and pre-entry visits and attended study visits on Day 0 and Weeks 1, 2, 4, 6, 7, 8, 10, 12, 16, 20, 24, 28, 36, and 48. Participants were followed for 48 weeks.

Due to observed adverse events which were deemed possibly related to study treatment in two of four treated participants, the study was terminated and did not enroll further participants. The two participants who had adverse events did not receive the second infusion. The treated participants were followed for the planned 48 weeks, while the placebo participant was not followed after a final study visit at week 7.

Eligibility criteria: Inclusion Criteria:

* HIV-1 infection
* On ART for at least 24 months
* Receiving ART with no changes of the components of ART medications within 90 days prior to study entry

  * Changes within drug class, in drug formulation or dose are allowed more than 30 days prior to study entry.
* CD4+ T cell count ≥350 cells/mm\^3
* At least two plasma HIV-1 RNA less than the quantification limit of an FDA-approved assay within 18 months

  * A single detectable HIV-1 RNA but less than 1000 copies/mL is allowed if followed by HIV-1 RNA below quantifiable limits.
* HIV-1 RNA level less than the quantification limit of an FDA-approved assay within 90 days prior to study entry
* The following laboratory values within 90 days prior to entry:

  * Absolute neutrophil count (ANC) ≥1500 cells/mm\^3
  * Hemoglobin ≥14.0 g/dL for men and ≥12.0 g/dL for women
  * Platelet count ≥150,000/mm\^3
  * Creatinine clearance ≥60 mL/min
  * Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) within normal limits
  * Normal thyroid, adrenal and diabetes testing
* Negative tuberculosis (TB) test result, OR documentation of completed TB prophylaxis treatment
* HCV antibody negative result or, if HCV antibody positive, undetectable HCV RNA result
* Negative HBsAg result
* Ability and willingness to provide informed consent.
* Ability and willingness to continue non-study-provided cART throughout the study.
* Female participants must have a negative pregnancy test. Agree not to participate in a conception process (e.g., active attempt to become pregnant or to impregnate, sperm donation, in vitro fertilization, egg donation) during the study.
* When participating in sexual activity that could lead to pregnancy, agree to use at least two reliable forms of contraception simultaneously during the study through week 48.
* Participants who are not of reproductive potential (women who have been post-menopausal for at least 24 consecutive months or have undergone hysterectomy and/or bilateral oophorectomy or salpingectomy or men who have documented azoospermia or undergone vasectomy) are eligible without requiring the use of contraceptives.
* Weight ≥50 kg (110 pounds)

Exclusion Criteria:

* History of malignancy within the last 5 years.

  * Prior non-melanoma skin cancer (e.g., basal cell carcinoma or squamous cell skin cancer) is not exclusionary with documentation of complete resection at least 3 months prior to enrollment.
* HIV-related opportunistic infections within the last 5 years
* Chronic obstructive pulmonary disease (COPD).
* Prior radiation therapy.
* Active or previously treated active TB.
* Active asthma requiring any treatment in the prior 2 years
* Type I or type II diabetes mellitus.
* History of or active autoimmune disorders including but not limited to inflammatory bowel diseases, scleroderma, severe psoriasis, myocarditis, uveitis, pneumonitis, systemic lupus erythematosus, rheumatoid arthritis, optic neuritis, myasthenia gravis, adrenal insufficiency, hypothyroidism and/or hyperthyroidism, autoimmune thyroiditis, hypophysitis, or sarcoidosis.
* Immune deficiency other than that caused by HIV infection.
* Currently breastfeeding or pregnant.
* Known allergy/sensitivity or any hypersensitivity to mAb-based biologics, cemiplimab (anti-PD-1) or its formulation.
* Active drug or alcohol use or dependence that, in the opinion of the site investigator, would interfere with adherence to study requirements.
* Receipt of investigational drug or use of investigational medical device within 6 months prior to study entry.
* Use of or intent to use immunomodulators (e.g., interleukins, interferons, cyclosporine, systemic corticosteroids exceeding physiologic doses), HIV vaccine, or systemic cytotoxic chemotherapy within 60 days prior to study entry.

  * NOTE: Participants receiving stable physiologic glucocorticoid doses, defined as prednisone ≤10 mg/day or the equivalent, will not be excluded. Stable physiologic glucocorticoid doses should not be discontinued for the duration of the study. In addition, participants receiving topical corticosteroids will not be excluded.
* Any vaccination within 30 days
* HCV treatment within 6 months
* Prior immunoglobulin (IgG) therapy.
* Current use or intent to use biotin ≥5 mg/day, including within dietary supplements.
* History of chronic congestive heart failure or other significant cardiac conditions.
* Any active, clinically significant medical condition that, in the opinion of the site investigator, would place the participant at increased risk.

Primary outcomes:
measure: Count of Participants With a Grade >=3 Adverse Event (AE) or Grade >=1 Immune-related AE (irAE) Related to Study Treatment
timeFrame: Study Entry through Week 48 or premature discontinuation
measure: Count of Participants With a Grade >=1 irAE Related to Study Treatment
timeFrame: Study Entry through Week 48 or premature discontinuation
Secondary outcomes:
measure: Change in HIV-1 Gag-specific CD8+ T Cells by Intracellular Staining for CD107a and Interferon Gamma (IFNg) From Baseline to Post-baseline
timeFrame: Baseline through Week 12
measure: Change in HIV-1 Gag-specific CD8+ T Cells by Intracellular Staining for IFNg or CD107a Alone From Baseline to Post-baseline
timeFrame: Baseline through Week 12
measure: Change in Polyfunctional Response of HIV-1 Gag-specific CD8+ T Cells by Intracellular Staining for IFNg, CD107a, IL-2, and Tumor Necrosis Factor Alpha (TNFa) From Baseline to Post-baseline
timeFrame: Baseline through Week 12
measure: Change in HIV-1 Gag-specific CD8+ T Cells by Intracellular Staining for IFNg and CD107a After Each Infusion
timeFrame: Baseline through Week 12
Other outcomes:
Locations:
city: Birmingham
country: United States
facility: Alabama CRS
state: Alabama
city: San Diego
country: United States
facility: UCSD Antiviral Research Center CRS
state: California
city: Chapel Hill
country: United States
facility: Chapel Hill CRS
state: North Carolina
Study officials:
affiliation: Chapel Hill CRS
name: Cynthia Gay, MD
role: STUDY_CHAIR
affiliation: Johns Hopkins University
name: W. David Hardy, MD
role: STUDY_CHAIR
References:
citation: Gay CL, Bosch RJ, McKhann A, Moseley KF, Wimbish CL, Hendrickx SM, Messer M, Furlong M, Campbell DM, Jennings C, Benson C, Overton ET, Macatangay BJC, Kuritzkes DR, Miller E, Tressler R, Eron JJ, Hardy WD; A5370 Team. Suspected Immune-Related Adverse Events With an Anti-PD-1 Inhibitor in Otherwise Healthy People With HIV. J Acquir Immune Defic Syndr. 2021 Aug 15;87(5):e234-e236. doi: 10.1097/QAI.0000000000002716. No abstract available.