{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Phase+1+Sickle+Cell",
    "query": {
      "condition": "Phase 1 Sickle Cell"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 67,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Phase+1+Sickle+Cell&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-25T00:12:59.736Z",
  "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": "NCT02114203",
      "title": "Safety, Tolerability, Pharmacokinetics, And Pharmacodynamics Study Of PF-04447943, Co-Administered With And Without Hydroxyurea, In Subjects With Stable Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Phase 1 Sickle Cell"
      ],
      "interventions": [
        {
          "name": "PDE9i",
          "type": "DRUG"
        },
        {
          "name": "placebo for PDE9i",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 30,
      "start_date": "2014-12",
      "completion_date": "2016-09",
      "has_results": true,
      "last_update_posted_date": "2017-12-14",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 12,
      "location_summary": "Chicago, Illinois • Boston, Massachusetts • Brooklyn, New York + 2 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02114203"
    },
    {
      "nct_id": "NCT01597401",
      "title": "A Single Dose Study of the Safety, Blood Levels and Biological Effects of Aes-103 Compared to Placebo in Subjects With Stable Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "Aes-103",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Baxalta now part of Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 19,
      "start_date": "2012-05-12",
      "completion_date": "2013-06-07",
      "has_results": false,
      "last_update_posted_date": "2021-05-05",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01597401"
    },
    {
      "nct_id": "NCT04285827",
      "title": "Safety of Single Doses of CSL889 in Adult Patients With Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "CSL889",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "CSL Behring",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 28,
      "start_date": "2021-05-20",
      "completion_date": "2023-07-24",
      "has_results": false,
      "last_update_posted_date": "2023-09-06",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 8,
      "location_summary": "Chicago, Illinois • Baltimore, Maryland • Minneapolis, Minnesota + 5 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "The Bronx",
          "state": "New York"
        },
        {
          "city": "Greenville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04285827"
    },
    {
      "nct_id": "NCT04594031",
      "title": "US Phase I Study of ECT-001-CB in Patients With Sickle-Cell Disease",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Umbilical Cord Blood",
        "Hematopoietic Cell Proliferation"
      ],
      "interventions": [
        {
          "name": "ECT-001-CB (UM171-Expanded Cord Blood Transplant)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "ExCellThera inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "5 Years to 30 Years"
      },
      "enrollment_count": 0,
      "start_date": "2021-07-13",
      "completion_date": "2024-02-02",
      "has_results": false,
      "last_update_posted_date": "2022-07-05",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 2,
      "location_summary": "Palo Alto, California • San Francisco, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04594031"
    },
    {
      "nct_id": "NCT04853576",
      "title": "A Study Evaluating the Safety and Efficacy of EDIT-301 in Participants With Severe Sickle Cell Disease (RUBY)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Hemoglobinopathies"
      ],
      "interventions": [
        {
          "name": "EDIT-301",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "GENETIC"
      ],
      "sponsor": "Editas Medicine, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "12 Years to 50 Years"
      },
      "enrollment_count": 45,
      "start_date": "2021-05-04",
      "completion_date": "2025-08",
      "has_results": false,
      "last_update_posted_date": "2025-01-31",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 21,
      "location_summary": "Oakland, California • Aurora, Colorado • New Haven, Connecticut + 15 more",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "St. Petersburg",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04853576"
    },
    {
      "nct_id": "NCT01419704",
      "title": "Phase I/II Pilot Study of Mixed Chimerism to Treat Hemoglobinopathies",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Anemia, Sickle Cell",
        "Complex and Transfusion-dependent Hemoglobinopathies",
        "Thalassemia",
        "Diamond-Blackfan Anemia",
        "Bone Marrow Failure Syndromes",
        "Alpha-Thalassemia",
        "Beta-Thalassemia"
      ],
      "interventions": [
        {
          "name": "Enriched Hematopoetic Stem Cell Infusion",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Talaris Therapeutics Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "Up to 45 Years"
      },
      "enrollment_count": 0,
      "start_date": "2011-05",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2023-03-03",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 3,
      "location_summary": "Chicago, Illinois • Louisville, Kentucky • Durham, North Carolina",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01419704"
    },
    {
      "nct_id": "NCT04443907",
      "title": "Study of Safety and Efficacy of Genome-edited Hematopoietic Stem and Progenitor Cells in Sickle Cell Disease (SCD)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "OTQ923",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "2 Years to 40 Years"
      },
      "enrollment_count": 4,
      "start_date": "2020-08-25",
      "completion_date": "2025-01-06",
      "has_results": false,
      "last_update_posted_date": "2026-01-08",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 3,
      "location_summary": "Chicago, Illinois • New York, New York • Memphis, Tennessee",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04443907"
    },
    {
      "nct_id": "NCT05169580",
      "title": "Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Pociredir",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Sickle Cell Anemia"
      ],
      "interventions": [
        {
          "name": "Pociredir oral capsule(s)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Fulcrum Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 45,
      "start_date": "2021-12-13",
      "completion_date": "2026-01-20",
      "has_results": false,
      "last_update_posted_date": "2026-02-12",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 14,
      "location_summary": "Little Rock, Arkansas • Los Angeles, California • Atlanta, Georgia + 11 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baton Rouge",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05169580"
    },
    {
      "nct_id": "NCT05904093",
      "title": "Study to Evaluate the Safety and Tolerability of Escalating Doses of Fostamatinib in Subjects With Stable Sickle Cell Disease",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Hb-SS Disease",
        "Hemoglobin S",
        "Disease Sickle Cell Anemia",
        "Sickle Cell Disorders",
        "Hemoglobin Beta Thalassemia Disease"
      ],
      "interventions": [
        {
          "name": "Fostamatinib",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 25,
      "start_date": "2024-12-18",
      "completion_date": "2027-05-14",
      "has_results": false,
      "last_update_posted_date": "2026-07-07",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05904093"
    },
    {
      "nct_id": "NCT06145282",
      "title": "Non-myeloablative Haploidentical HCT Study for Patients With Sickle Cell Disease, Including Compromised Organ Function",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "Briquilimab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Filgrastim",
          "type": "DRUG"
        },
        {
          "name": "Abatacept",
          "type": "DRUG"
        },
        {
          "name": "Sirolimus",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "4 Years to 100 Years"
      },
      "enrollment_count": 6,
      "start_date": "2023-12-28",
      "completion_date": "2027-11-26",
      "has_results": true,
      "last_update_posted_date": "2026-04-29",
      "last_synced_at": "2026-07-25T00:12:59.736Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06145282"
    }
  ]
}