{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=CLR+131",
    "query": {
      "intervention": "CLR 131"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T03:22:18.511Z",
  "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": "NCT02952508",
      "title": "Study of Iopofosine I-131 (CLR 131) in Select B-Cell Malignancies (CLOVER-1) With Expansion in Waldenstrom",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Waldenstrom Macroglobulinemia",
        "Multiple Myeloma",
        "Chronic Lymphocytic Leukemia",
        "Small Lymphocytic Lymphoma",
        "Lymphoplasmacytic Lymphoma",
        "Marginal Zone Lymphoma",
        "Mantle Cell Lymphoma",
        "Diffuse Large B Cell Lymphoma",
        "Central Nervous System Lymphoma"
      ],
      "interventions": [
        {
          "name": "Iopofosine I 131 single dose",
          "type": "DRUG"
        },
        {
          "name": "Iopofosine I 131 multiple dose",
          "type": "DRUG"
        },
        {
          "name": "Iopofosine I 131 fractionated dose",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2017-07-26",
      "completion_date": "2027-12-22",
      "has_results": false,
      "last_update_posted_date": "2026-03-18",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 29,
      "location_summary": "Los Angeles, California • Redlands, California • Washington D.C., District of Columbia + 25 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Redlands",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02952508"
    },
    {
      "nct_id": "NCT01898273",
      "title": "Imaging Trial With I-124-CLR1404 in Patients With Newly Diagnosed or Recurrent Glioblastoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Glioblastoma"
      ],
      "interventions": [
        {
          "name": "I-124-CLR1404",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 7,
      "start_date": "2014-02",
      "completion_date": "2015-12",
      "has_results": false,
      "last_update_posted_date": "2015-09-09",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 9,
      "location_summary": "Duarte, California • Tampa, Florida • Baltimore, Maryland + 6 more",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01898273"
    },
    {
      "nct_id": "NCT01778088",
      "title": "Open-Label Study of I-131-CLR1404 in Subjects With Recurrent Glioma",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Glioma"
      ],
      "interventions": [
        {
          "name": "I-131-CLR1404 Injection",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2014-05",
      "completion_date": "2015-01",
      "has_results": false,
      "last_update_posted_date": "2014-02-25",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01778088"
    },
    {
      "nct_id": "NCT01495663",
      "title": "Dose Escalation Study of I-131-CLR1404 in Subjects With Cancer That Does Not Respond to Treatment or Has Returned",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "I-131-CLR1404",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2011-12",
      "completion_date": "2014-01",
      "has_results": false,
      "last_update_posted_date": "2015-02-26",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 3,
      "location_summary": "Duarte, California • Washington D.C., District of Columbia • Madison, Wisconsin",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01495663"
    },
    {
      "nct_id": "NCT05610891",
      "title": "Novel Targeted Radiotherapy in Pediatric Patients With Inoperable Relapsed or Refractory HGG",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "High-Grade Glioma"
      ],
      "interventions": [
        {
          "name": "CLR 131",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "10 Years to 25 Years"
      },
      "enrollment_count": 50,
      "start_date": "2023-10-01",
      "completion_date": "2026-09",
      "has_results": false,
      "last_update_posted_date": "2026-03-18",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 7,
      "location_summary": "Palo Alto, California • New York, New York • Cincinnati, Ohio + 4 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05610891"
    },
    {
      "nct_id": "NCT04105543",
      "title": "CLR 131 Combined With Radiation for Head and Neck Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Head and Neck Cancer"
      ],
      "interventions": [
        {
          "name": "CLR 131",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2019-12-20",
      "completion_date": "2024-02-01",
      "has_results": true,
      "last_update_posted_date": "2025-09-02",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 2,
      "location_summary": "Johnson Creek, Wisconsin • Madison, Wisconsin",
      "locations": [
        {
          "city": "Johnson Creek",
          "state": "Wisconsin"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04105543"
    },
    {
      "nct_id": "NCT00925275",
      "title": "Dosimetry Study of I-131-CLR1404 in Patients With Relapsed or Refractory Advanced Solid Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Solid Tumors"
      ],
      "interventions": [
        {
          "name": "I-131-CLR1404",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 9,
      "start_date": "2009-06",
      "completion_date": "2010-02",
      "has_results": false,
      "last_update_posted_date": "2010-05-04",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 4,
      "location_summary": "Duarte, California • Washington D.C., District of Columbia • Baltimore, Maryland + 1 more",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00925275"
    },
    {
      "nct_id": "NCT02278315",
      "title": "Dose Escalation Study of I-131-CLR1404 in Patients With Relapsed or Refractory Multiple Myeloma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Multiple Myeloma"
      ],
      "interventions": [
        {
          "name": "I-131-CLR1404",
          "type": "DRUG"
        },
        {
          "name": "dexamethasone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 31,
      "start_date": "2015-02",
      "completion_date": "2022-08-10",
      "has_results": false,
      "last_update_posted_date": "2023-02-22",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 4,
      "location_summary": "Jacksonville, Florida • Maywood, Illinois • Detroit, Michigan + 1 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Maywood",
          "state": "Illinois"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02278315"
    },
    {
      "nct_id": "NCT03478462",
      "title": "Dose Escalation Study of CLR 131 in Pediatric Relapsed/Refractory Malignant Tumors Including Neuroblastoma and Sarcomas",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Pediatric Solid Tumor",
        "Pediatric Lymphoma",
        "Pediatric Brain Tumor",
        "DIPG",
        "Neuroblastoma",
        "Ewing Sarcoma",
        "Rhabdomyosarcoma",
        "Osteosarcoma"
      ],
      "interventions": [
        {
          "name": "CLR 131",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "2 Years to 25 Years"
      },
      "enrollment_count": 30,
      "start_date": "2019-04-30",
      "completion_date": "2027-02-25",
      "has_results": false,
      "last_update_posted_date": "2026-03-18",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 6,
      "location_summary": "Palo Alto, California • New York, New York • Chapel Hill, North Carolina + 3 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03478462"
    },
    {
      "nct_id": "NCT07311993",
      "title": "Phase 1 Study of CLR 125 in Triple Negative Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Iopofosine I 131",
          "type": "DRUG"
        },
        {
          "name": "CLR 125",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cellectar Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2025-12-05",
      "completion_date": "2029-07",
      "has_results": false,
      "last_update_posted_date": "2026-06-03",
      "last_synced_at": "2026-09-02T03:22:18.511Z",
      "location_count": 4,
      "location_summary": "Jacksonville, Florida • Glen Burnie, Maryland • Rochester, Minnesota + 1 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Glen Burnie",
          "state": "Maryland"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Princeton",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07311993"
    }
  ]
}