{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Developmental+and+Epileptic+Encephalopathies",
    "query": {
      "condition": "Developmental and Epileptic Encephalopathies"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 34,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Developmental+and+Epileptic+Encephalopathies&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T03:08:07.965Z",
  "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": "NCT04537832",
      "title": "Natural History Study of Infants and Children With Developmental and Epileptic Encephalopathies",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Dravet Syndrome"
      ],
      "interventions": [
        {
          "name": "No Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Encoded Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "60 Months",
        "sex": "ALL",
        "summary": "6 Months to 60 Months"
      },
      "enrollment_count": 58,
      "start_date": "2021-01-18",
      "completion_date": "2023-03-31",
      "has_results": false,
      "last_update_posted_date": "2023-06-12",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 12,
      "location_summary": "Los Angeles, California • San Francisco, California • Aurora, Colorado + 9 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04537832"
    },
    {
      "nct_id": "NCT05737784",
      "title": "A Clinical Trial of PRAX-222 in Pediatric Participants With Early Onset SCN2A Developmental and Epileptic Encephalopathy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "SCN2A-DEE",
        "Epilepsy"
      ],
      "interventions": [
        {
          "name": "PRAX-222 - Initial Dose",
          "type": "DRUG"
        },
        {
          "name": "PRAX-222 - Initial Ascending Doses",
          "type": "DRUG"
        },
        {
          "name": "PRAX-222 - Optional Ascending Doses",
          "type": "DRUG"
        },
        {
          "name": "PRAX-222 - Fixed Doses",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Praxis Precision Medicines",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "2 Years to 18 Years"
      },
      "enrollment_count": 60,
      "start_date": "2023-04-13",
      "completion_date": "2027-09",
      "has_results": false,
      "last_update_posted_date": "2025-08-21",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05737784"
    },
    {
      "nct_id": "NCT06092346",
      "title": "A Natural History Study Seeks to Understand the Clinical, Genomic, Pharmacological, Laboratory, and Dietary Determinates of Pyrimidine and Purine Metabolism Disorders",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "AMPD3, OMIM*102772, AMP Deaminase Deficiency",
        "AK1, OMIM *103000, Adenylate Kinase Deficiency",
        "AMPD1, OMIM *102770, Myopathy Due to Myoadenylate Deaminase Deficiency",
        "TPMT, OMIM *187680, Thoipurines, Poor Metabolism of",
        "IMPDH1, OMIM *146690, Retinitis Pigmentosa Type 10, Leber Congenital Amauriosis Type 11",
        "APRT, OMIM *102600, Adenine Phosphoribosyltransferase Deficiency",
        "HPRT1, OMIM *308000 Lesch-Nyhan Disease",
        "XDH, OMIM *607633, Xanthinuria Type 1",
        "SLC2A9, OMIM *606142 Hypouricemia",
        "SLC22A12, OMIM *607096 Hypouricemia",
        "PRPS1 Def, OMIM *311850, Arts Syndrome; Charcot-Marie-Tooth Disease",
        "PRPS1 SA, OMIM *311850 Gout, PRPS-related Phosphoribosylpyrophosphate Synthetase Superactivity",
        "AMPD2, OMIM *102771, Spastic Paraplegia 63; Pontocerebellar Hypoplasia",
        "ITPA, OMIM *147520, Inosine Triphosphatase Deficiency; Developmental and Epileptic Encephalopathy 35",
        "ADSL, OMIM *608222, Adenylosuccinate Lyase Deficiency",
        "PNP, OMIM *164050, Nucleoside Phosphorylase Deficiency",
        "ADA2, OMIM *607575,Sneddon Syndrome; VAIHS",
        "CAD, *1140120, Developmental and Epileptic Encephalopathy",
        "UPB1, OMIM *606673, Beta-ureidopropionase Deficiency",
        "DPYS, OMIM *613326, Dihydropyrimidinase Deficiency",
        "DPYD, OMIM *274270, Dihydropyrimidine Dehydrogenase Deficiency",
        "DHODH, OMIM *126064, Miller Syndrome (Postaxial Acrofacial Dysostosis)",
        "UMPS, OMIM *613891, Orotic Aciduria",
        "NT5C3A<TAB>, OMIM *606224, Anemia, Hemolytic, Due to UMPH1 Deficiency",
        "UNG, OMIM *191525, Hyper-IgM Syndrome 5",
        "AICDA, OMIM *605257, Immunodeficiency With Hyper-IgM, Type 2; HIGM2",
        "Purine-Pyrimidine Metabolism",
        "Metabolic Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Human Genome Research Institute (NHGRI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "1 Month to 100 Years"
      },
      "enrollment_count": 999,
      "start_date": "2023-12-19",
      "completion_date": "2099-01-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06092346"
    },
    {
      "nct_id": "NCT04337697",
      "title": "Neonatal Seizure Registry - Developmental Functional EValuation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Neonatal Seizure",
        "Hypoxic-Ischemic Encephalopathy",
        "Stroke",
        "Intracranial Hemorrhages",
        "Epilepsy",
        "Cerebral Palsy",
        "Intellectual Disability"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "2 Years to 8 Years"
      },
      "enrollment_count": 188,
      "start_date": "2020-03-15",
      "completion_date": "2025-03-01",
      "has_results": false,
      "last_update_posted_date": "2026-02-05",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 9,
      "location_summary": "San Francisco, California • Stanford, California • Washington D.C., District of Columbia + 5 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04337697"
    },
    {
      "nct_id": "NCT03166215",
      "title": "Study of TAK-935 as an Adjunctive Therapy in Participants With Developmental and/or Epileptic Encephalopathies",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Developmental and/or Epileptic Encephalopathies"
      ],
      "interventions": [
        {
          "name": "TAK-935",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "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": 18,
      "start_date": "2017-08-17",
      "completion_date": "2018-09-19",
      "has_results": true,
      "last_update_posted_date": "2021-01-07",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 11,
      "location_summary": "Phoenix, Arizona • Port Charlotte, Florida • Tampa, Florida + 8 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Port Charlotte",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03166215"
    },
    {
      "nct_id": "NCT05226780",
      "title": "Extension Study to Evaluate How Safe and Tolerable NBI-921352 is as an Adjunctive Therapy for Participants With SCN8A-DEE",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "SCN8A Developmental and Epileptic Encephalopathy Syndrome"
      ],
      "interventions": [
        {
          "name": "NBI-921352",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Neurocrine Biosciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "22 Years",
        "sex": "ALL",
        "summary": "2 Years to 22 Years"
      },
      "enrollment_count": 8,
      "start_date": "2022-07-12",
      "completion_date": "2026-03",
      "has_results": false,
      "last_update_posted_date": "2025-07-17",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 4,
      "location_summary": "San Francisco, California • Washington D.C., District of Columbia • Rochester, New York + 1 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Rochester",
          "state": "New York"
        },
        {
          "city": "Fort Worth",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05226780"
    },
    {
      "nct_id": "NCT03525431",
      "title": "Clinical Utility of Pediatric Whole Exome Sequencing",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Encephalopathy",
        "Birth Defect",
        "Intellectual Disability",
        "Multiple Congenital Anomaly",
        "Metabolic Disease",
        "Epilepsy",
        "Neuro-Degenerative Disease",
        "Cerebral Palsy",
        "Developmental Delay",
        "Developmental Defect"
      ],
      "interventions": [
        {
          "name": "Whole Exome Sequencing",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "Up to 25 Years"
      },
      "enrollment_count": 529,
      "start_date": "2017-08-01",
      "completion_date": "2022-05-13",
      "has_results": true,
      "last_update_posted_date": "2023-07-18",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 4,
      "location_summary": "Fresno, California • Oakland, California • San Francisco, California",
      "locations": [
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03525431"
    },
    {
      "nct_id": "NCT07019922",
      "title": "A Clinical Trial of Elsunersen in Pediatric SCN2A-DEE to Assess Efficacy and Safety",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Epileptic Encephalopathy",
        "SCN2A Encephalopathy"
      ],
      "interventions": [
        {
          "name": "1mg elsunersen",
          "type": "DRUG"
        },
        {
          "name": "sham procedure",
          "type": "PROCEDURE"
        },
        {
          "name": "0.5mg elsunersen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Praxis Precision Medicines",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "1 Day to 18 Years"
      },
      "enrollment_count": 50,
      "start_date": "2025-08-13",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 2,
      "location_summary": "San Diego, California • Chicago, Illinois",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07019922"
    },
    {
      "nct_id": "NCT06938542",
      "title": "Palliative Care Needs of Children With Rare Diseases and Their Families",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Trisomy 13 Syndrome",
        "Arthrogryposis Congenita Multiplex With Intestinal Atresia",
        "Asparagine Synthetase Deficiency",
        "CHARGE Syndrome",
        "Early Infantile Epileptic Encephalopathy",
        "FOXG1 Syndrome",
        "KBG Syndrome",
        "Noonan Syndrome",
        "Severe Hemophilia A",
        "Short Bowel Syndrome",
        "Beta-Propeller Protein-Associated Neurodegeneration",
        "Brain Injury of Prematurity With Periventricular Leukomalacia",
        "Chromosome 17p13.3 Microdeletion Syndrome",
        "Chromosome 1q43-1q44 Deletion",
        "Cockayne Syndrome",
        "Congenital Diaphragmatic Hernia",
        "End-Stage Renal Disease With Cloacal Anomaly",
        "Mitochondrial Depletion Disorder",
        "Severe Factor VII Deficiency"
      ],
      "interventions": [
        {
          "name": "Family Centered pediatric palliative care for family caregivers of children with rare diseases.",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Children's National Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "12 Months to 99 Years"
      },
      "enrollment_count": 480,
      "start_date": "2025-10-02",
      "completion_date": "2029-08-02",
      "has_results": false,
      "last_update_posted_date": "2026-01-28",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06938542"
    },
    {
      "nct_id": "NCT06149663",
      "title": "Intermediate-Size Expanded Access Protocol (EAP) for LP352",
      "overall_status": "AVAILABLE",
      "study_type": "EXPANDED_ACCESS",
      "phases": [],
      "conditions": [
        "Dravet Syndrome",
        "Lennox Gastaut Syndrome",
        "Developmental and Epileptic Encephalopathies"
      ],
      "interventions": [
        {
          "name": "LP352",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Longboard Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "2 Years to 65 Years"
      },
      "enrollment_count": null,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2025-01-22",
      "last_synced_at": "2026-05-22T03:08:07.965Z",
      "location_count": 19,
      "location_summary": "Downey, California • Los Angeles, California • San Francisco, California + 15 more",
      "locations": [
        {
          "city": "Downey",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Gulf Breeze",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06149663"
    }
  ]
}