Testing the Combination of Two Experimental Drugs MK-3475 (Pembrolizumab) and Interferon-gamma for the Treatment of Mycosis Fungoides and Sézary Syndrome and Advanced Synovial Sarcoma
CompletedPhase 2Results postedLast updated 25 October 2023
What this trial tests
Phase 2 trial testing Interferon Gamma-1b in Metastatic Myxoid Liposarcoma in 28 participants. Completed in 14 March 2023.
12 and older, any sex, with Metastatic Myxoid Liposarcoma or Metastatic Round Cell Liposarcoma. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Overall Response Rate (ORR)Primary· Up to 2 years
Participants in Treatment Group 1 will be assessed for response and progression using standard response criteria in patients with Mycosis Fungoides and Sezary syndrome. Per Global Response Score determined by evaluating skin, lymph nodes, internal organs (viscera), and blood specimens: Complete Response (CR), complete disappearance of all clinical evidence of disease; Partial Response (PR), regression of measurable disease.
Participants in Treatment Group 2 will be assessed for response and progression using Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria. Complete Response
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
6
Group II (Pembrolizumab, Interferon Gamma-1b)
0
Incidence of Adverse EventsSecondary· Up to 2 years and 1 months
Will be graded according to Common Terminology Criteria for Adverse Events (CTCAE) version 5.0.
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
15
Group II (Pembrolizumab, Interferon Gamma-1b)
12
Time to Response (TTR)Secondary· Time interval between the date of first treatment and the date of response (complete response [CR]/partial response [PR]), up to 2 years
Will use simple statistics.
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
126
106 – 463
Duration of Response (DOR)Secondary· Time interval between the date of first response (CR/PR) and the date of progression, up to 2 years and 11 months
Will be assessed using the Kaplan-Meier method.
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
505.0
106.0 – NA
Progression-free Survival (PFS)Secondary· Time from enrollment to disease progression or death, whichever occurs earlier, based upon investigator assessment, up to 3 years
Will be assessed using the Kaplan-Meier method
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
394.0
120.0 – 615.0
Group II (Pembrolizumab, Interferon Gamma-1b)
196.5
32.0 – NA
Event-free Survival (EFS)Secondary· Termination due to toxicity, initiation of next significant treatment, progressive disease, or death of any cause, up to 2 years
Will be assessed using the Kaplan-Meier method.
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
185.5
120.0 – 394.0
Group II (Pembrolizumab, Interferon Gamma-1b)
73.0
32.0 – NA
Rate of Overall Response Duration Beyond 12 Months (ORR12)Secondary· From the time measurement criteria are met for CR or PR (whichever is first recorded) until the first date beyond 12 months that recurrent disease is objectively documented, up to 2 years
Will be assessed per global assessment of mycosis fungoides and Sezary syndrome (confirmed \& investigator assessed). Will use binomial distribution.
Group
Value
95% CI
Group I (Pembrolizumab, Interferon Gamma-1b)
2
Group II (Pembrolizumab, Interferon Gamma-1b)
0
Adverse events — posted to ClinicalTrials.gov
Time frame: Adverse event data collected from the first administration of the study drug until 30 days after the last dose of trial treatment, up to 2 years and 1 month.
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
Group I (Pembrolizumab, Interferon Gamma-1b)
Serious: 4/16 (25%)
Deaths: 4/16
Group II (Pembrolizumab, Interferon Gamma-1b)
Serious: 5/12 (42%)
Deaths: 6/12
Serious adverse events (23 terms)
Reaction
System
Group I (Pembrolizumab, In…
Group II (Pembrolizumab, I…
Soft tissue infection
Infections and infestations
—
—
Bone infection
Infections and infestations
—
—
Urinary tract Infection
Infections and infestations
—
—
Headache
Nervous system disorders
—
—
Hypercalcemia
Metabolism and nutrition disorders
—
—
Acute kidney injury
Renal and urinary disorders
—
—
Atrial fibrillation
Cardiac disorders
—
—
Pericardial tamponade
Cardiac disorders
—
—
Cardiac arrest
Cardiac disorders
—
—
Abdominal pain
Gastrointestinal disorders
—
—
Vomiting
Gastrointestinal disorders
—
—
Nausea
Gastrointestinal disorders
—
—
Edema limbs
General disorders
—
—
Disease progression
General disorders
—
—
Fatigue
General disorders
—
—
Fever
General disorders
—
—
Pneumothorax
Respiratory, thoracic and mediastinal disorders
—
—
Lymphocyte count decreased
Investigations
—
—
Alanine aminotransferase increased
Investigations
—
—
Aspartate aminotransferase increased
Investigations
—
—
Tumor pain
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
—
—
Back pain
Musculoskeletal and connective tissue disorders
—
—
Spinal cord compression
Nervous system disorders
—
—
Other adverse events (98 terms — click to expand)
Reaction
System
Group I (Pembrolizumab, In…
Group II (Pembrolizumab, I…
Anemia
Blood and lymphatic system disorders
—
—
Chills
General disorders
—
—
Lymphocyte count decreased
Investigations
—
—
Fatigue
General disorders
—
—
Fever
General disorders
—
—
Flu like symptoms
General disorders
—
—
Skin and subcutaneous tissue disorders - Other
Skin and subcutaneous tissue disorders
—
—
Diarrhea
Gastrointestinal disorders
—
—
Headache
Nervous system disorders
—
—
Myalgia
Musculoskeletal and connective tissue disorders
—
—
Rash maculo-papular
Skin and subcutaneous tissue disorders
—
—
Tumor pain
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
This phase II trial studies how well pembrolizumab and interferon gamma-1b work in treating patients with stage IB-IVB mycosis fungoides and Sezary syndrome that has come back (relapsed) or has not responded to previous treatment (refractory). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Interferon gamma-1b may boost the immune system activity. Giving pembrolizumab and interferon gamma-1b together may work better in treating patients with stage IB-IVB mycosis fungoides and Sezary syndrome.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 9 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by National Cancer Institute (NCI)
Last refreshed: 25 October 2023
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT03063632.