{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sickle+Cell+Syndrome+Variant",
    "query": {
      "condition": "Sickle Cell Syndrome Variant"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 6,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-27T04:44:32.320Z",
  "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": "NCT03685721",
      "title": "Genotype -Phenotype Correlation of PKLR Variants With Pyruvate Kinase, 2,3-Diphosphglycerate and Adenosine Triphosphate Activities in Red Blood Cells of People With Sickle Cell Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sickle Cell",
        "PKLR Variants",
        "Adenosine Triphosphate Activities"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 800,
      "start_date": "2018-10-11",
      "completion_date": "2026-07-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-08",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03685721"
    },
    {
      "nct_id": "NCT05675436",
      "title": "Investigating the Mechanistic Effects of Mitapivat in Subjects With Sickle Cell Disease",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sickle Cell Anemia",
        "Sickle Cell Thalassemia",
        "Sickle Cell Pain",
        "Hbss",
        "Hbsc",
        "Sickle Beta Thalassemia",
        "Sickle Beta Zero Thalassemia",
        "Sickle Cell Syndrome Variant"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "16 Years to 80 Years"
      },
      "enrollment_count": 6,
      "start_date": "2024-05-09",
      "completion_date": "2027-10-27",
      "has_results": false,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05675436"
    },
    {
      "nct_id": "NCT01441141",
      "title": "Genetics and Pain Severity in Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Genotype",
        "Pain",
        "Genetic Variation",
        "Quantitative Sensory Testing (QST)",
        "GCH1"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 67,
      "start_date": "2012-06-17",
      "completion_date": "2020-12-09",
      "has_results": false,
      "last_update_posted_date": "2020-12-10",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01441141"
    },
    {
      "nct_id": "NCT00040417",
      "title": "Bone Marrow Transplant From Donor Using Less Toxic Conditioning for Patient With High Risk Hemoglobinopathies",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Anemia",
        "Hemoglobinopathy",
        "Thalassemia"
      ],
      "interventions": [
        {
          "name": "FLUDARABINE",
          "type": "DRUG"
        },
        {
          "name": "CAMPATH-IH",
          "type": "DRUG"
        },
        {
          "name": "Total Body Irradiation",
          "type": "PROCEDURE"
        },
        {
          "name": "FK506",
          "type": "DRUG"
        },
        {
          "name": "G-SCF (Granulocyte-colony stimulating factor)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "1 Day to 65 Years"
      },
      "enrollment_count": 15,
      "start_date": "2000-08",
      "completion_date": "2003-11-21",
      "has_results": false,
      "last_update_posted_date": "2020-01-18",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 2,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00040417"
    },
    {
      "nct_id": "NCT00040469",
      "title": "Bone Marrow Transplant From Related Donor for Patients With High Risk Hemoglobinopathies",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Anemia",
        "Hemoglobinopathy",
        "Thalassemia"
      ],
      "interventions": [
        {
          "name": "Campath -1H",
          "type": "DRUG"
        },
        {
          "name": "Dilantin",
          "type": "DRUG"
        },
        {
          "name": "Busulfan",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "1 Day to 64 Years"
      },
      "enrollment_count": 15,
      "start_date": "2000-08",
      "completion_date": "2003-11-21",
      "has_results": false,
      "last_update_posted_date": "2020-01-18",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 2,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00040469"
    },
    {
      "nct_id": "NCT03937817",
      "title": "Collection of Human Biospecimens for Basic and Clinical Research Into Globin Variants",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alpha and Beta Thalassemia",
        "Sickle Cell Disease",
        "Malaria",
        "Human Physiology"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 300,
      "start_date": "2019-09-25",
      "completion_date": "2029-03-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-18",
      "last_synced_at": "2026-06-27T04:44:32.320Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03937817"
    }
  ]
}