{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Ontak+%28Denileukin+Diftitox%29",
    "query": {
      "intervention": "Ontak (Denileukin Diftitox)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 45,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Ontak+%28Denileukin+Diftitox%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T20:07:40.562Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT00006345",
      "title": "Dexamethasone Followed by Denileukin Diftitox in Treating Patients With Persistent or Recurrent T-Cell Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Drug/Agent Toxicity by Tissue/Organ",
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "denileukin diftitox",
          "type": "BIOLOGICAL"
        },
        {
          "name": "dexamethasone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Ligand Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": null,
      "start_date": "1999-11",
      "completion_date": "2004-03",
      "has_results": false,
      "last_update_posted_date": "2013-05-30",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 11,
      "location_summary": "Miami, Florida • Chicago, Illinois • New Orleans, Louisiana + 8 more",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006345"
    },
    {
      "nct_id": "NCT00945269",
      "title": "Therapeutic Autologous Lymphocytes, Aldesleukin, and Denileukin Diftitox in Treating Patients With Stage III-IV Melanoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Recurrent Melanoma",
        "Stage III Melanoma",
        "Stage IV Melanoma"
      ],
      "interventions": [
        {
          "name": "therapeutic autologous lymphocytes",
          "type": "BIOLOGICAL"
        },
        {
          "name": "aldesleukin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "denileukin diftitox",
          "type": "BIOLOGICAL"
        },
        {
          "name": "biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "immunohistochemistry staining method",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "polymerase chain reaction",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "PROCEDURE",
        "OTHER",
        "GENETIC"
      ],
      "sponsor": "Fred Hutchinson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 3,
      "start_date": "2009-07",
      "completion_date": "2011-01",
      "has_results": false,
      "last_update_posted_date": "2022-11-15",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00945269"
    },
    {
      "nct_id": "NCT00051012",
      "title": "Study of ONTAK (Denileukin Diftitox) in Previously Treated Cutaneous T-Cell Lymphoma Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Lymphoma, T-Cell, Cutaneous",
        "Mycosis Fungoides",
        "Sezary Syndrome"
      ],
      "interventions": [
        {
          "name": "ONTAK",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eisai Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 86,
      "start_date": "1995-09",
      "completion_date": "2006-12",
      "has_results": false,
      "last_update_posted_date": "2008-03-05",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00051012"
    },
    {
      "nct_id": "NCT00801918",
      "title": "Denileukine Diftitox for Relapsed ALCL",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Anaplastic Large-Cell Lymphoma"
      ],
      "interventions": [
        {
          "name": "Denileukin Diftitox",
          "type": "DRUG"
        },
        {
          "name": "Denileukin diftitox, ifosfamide, cyclophosphamide, etoposide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "24 Years",
        "sex": "ALL",
        "summary": "2 Years to 24 Years"
      },
      "enrollment_count": 0,
      "start_date": "2008-12",
      "completion_date": "2012-06",
      "has_results": false,
      "last_update_posted_date": "2013-05-15",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00801918"
    },
    {
      "nct_id": "NCT00003615",
      "title": "Denileukin Diftitox in Treating Patients With Non-Hodgkin's Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "denileukin diftitox",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Eastern Cooperative Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 77,
      "start_date": "1999-05-20",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2023-06-15",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 10,
      "location_summary": "Chicago, Illinois • Boston, Massachusetts • Las Vegas, Nevada + 7 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        },
        {
          "city": "Elizabeth",
          "state": "New Jersey"
        },
        {
          "city": "Flemington",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00003615"
    },
    {
      "nct_id": "NCT01251952",
      "title": "Dose Escalation Trial of Denileukin Diftitox (Ontak) Post Autologous Transplantation",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Multiple Myeloma"
      ],
      "interventions": [
        {
          "name": "Denileukin Diftitox (Ontak)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Barbara Ann Karmanos Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 2,
      "start_date": "2010-11",
      "completion_date": "2013-05",
      "has_results": true,
      "last_update_posted_date": "2017-06-20",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01251952"
    },
    {
      "nct_id": "NCT00278369",
      "title": "Pilot Study of Denileukin Diftitox Plus High-Dose IL-2 for Patients With Metastatic Renal Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Kidney Cancer"
      ],
      "interventions": [
        {
          "name": "aldesleukin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "denileukin diftitox",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2005-04",
      "completion_date": "2010-09",
      "has_results": false,
      "last_update_posted_date": "2013-05-22",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00278369"
    },
    {
      "nct_id": "NCT06940739",
      "title": "A Study to Investigate the Safety and Efficacy of IOV-3001 in Adults With Advanced Melanoma Who Will Receive Lifileucel",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Unresectable Melanoma",
        "Metastatic Melanoma",
        "Ocular Melanoma"
      ],
      "interventions": [
        {
          "name": "IOV-3001",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Iovance Biotherapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 42,
      "start_date": "2025-03-11",
      "completion_date": "2032-07",
      "has_results": false,
      "last_update_posted_date": "2026-06-15",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 3,
      "location_summary": "Denver, Colorado • Chapel Hill, North Carolina • Nashville, Tennessee",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06940739"
    },
    {
      "nct_id": "NCT01127451",
      "title": "Study of Denileukin Diftitox in Participants With Stage IIIC and Stage IV Melanoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Stage IIIC Melanoma",
        "Stage IV Melanoma"
      ],
      "interventions": [
        {
          "name": "Denileukin diftitox",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eisai Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 75,
      "start_date": "2010-06-22",
      "completion_date": "2015-04-07",
      "has_results": true,
      "last_update_posted_date": "2022-04-13",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 10,
      "location_summary": "Encinitas, California • Los Angeles, California • Washington D.C., District of Columbia + 7 more",
      "locations": [
        {
          "city": "Encinitas",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01127451"
    },
    {
      "nct_id": "NCT02009384",
      "title": "Ipilimumab Administered to Stage IIIC Stage IV Melanoma After Reg. T Cell Depletion With Denileukin Diftitox",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Melanoma"
      ],
      "interventions": [
        {
          "name": "Ipilimumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Louisville",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2,
      "start_date": "2012-01",
      "completion_date": "2014-10",
      "has_results": true,
      "last_update_posted_date": "2021-10-25",
      "last_synced_at": "2026-09-29T20:07:40.562Z",
      "location_count": 1,
      "location_summary": "Louisville, Kentucky",
      "locations": [
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02009384"
    }
  ]
}