{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Mental+Retardation%2C+X+Linked&page=2",
    "query": {
      "condition": "Mental Retardation, X Linked",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Mental+Retardation%2C+X+Linked&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T22:48:57.798Z",
  "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": "NCT02738281",
      "title": "Natural History of Rett Syndrome & Related Disorders",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rett Syndrome",
        "MECP2 Duplication dIsorder",
        "CDKL5 Disorder",
        "FOXG1 Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1044,
      "start_date": "2015-11",
      "completion_date": "2021-07-31",
      "has_results": false,
      "last_update_posted_date": "2021-08-05",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 14,
      "location_summary": "Birmingham, Alabama • Oakland, California • San Diego, California + 11 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02738281"
    },
    {
      "nct_id": "NCT02204904",
      "title": "Observational Study to Evaluate Allogeneic HSCT Outcomes for Cerebral Adrenoleukodystrophy (CALD)",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "X-Linked Adrenoleukodystrophy (X-ALD)",
        "Cerebral Adrenoleukodystrophy (CALD)",
        "Adrenoleukodystrophy (ALD)"
      ],
      "interventions": [
        {
          "name": "Allo-HSCT",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "GENETIC"
      ],
      "sponsor": "Genetix Biotherapeutics Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "17 Years",
        "sex": "MALE",
        "summary": "Up to 17 Years · Male only"
      },
      "enrollment_count": 59,
      "start_date": "2015-04",
      "completion_date": "2019-12-06",
      "has_results": false,
      "last_update_posted_date": "2020-05-21",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 6,
      "location_summary": "Los Angeles, California • Palo Alto, California • Boston, Massachusetts + 3 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02204904"
    },
    {
      "nct_id": "NCT03510156",
      "title": "Treatment of Disruptive Behaviors in Fragile X Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Fragile X Syndrome",
        "Disruptive Behavior"
      ],
      "interventions": [
        {
          "name": "Behavior analytic treatment",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "10 Years",
        "sex": "MALE",
        "summary": "3 Years to 10 Years · Male only"
      },
      "enrollment_count": 60,
      "start_date": "2016-07",
      "completion_date": "2022-03",
      "has_results": false,
      "last_update_posted_date": "2022-05-04",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03510156"
    },
    {
      "nct_id": "NCT07328529",
      "title": "Inhibition of Aggressive Behavior in Participants With Fragile X Syndrome",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Aggressive Behavior in Fragile X Syndome"
      ],
      "interventions": [
        {
          "name": "SRX246",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Azevan Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "MALE",
        "summary": "18 Years to 45 Years · Male only"
      },
      "enrollment_count": 80,
      "start_date": "2026-03",
      "completion_date": "2028-03",
      "has_results": false,
      "last_update_posted_date": "2026-01-09",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 3,
      "location_summary": "Sacramento, California • Chicago, Illinois • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07328529"
    },
    {
      "nct_id": "NCT03292887",
      "title": "Hunter Outcome Survey (HOS)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hunter Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1443,
      "start_date": "2005-10-03",
      "completion_date": "2023-02-16",
      "has_results": false,
      "last_update_posted_date": "2024-10-28",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 1,
      "location_summary": "Lexington, Massachusetts",
      "locations": [
        {
          "city": "Lexington",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03292887"
    },
    {
      "nct_id": "NCT05787587",
      "title": "A Study of PARG Inhibitor IDE161 in Participants With Advanced Solid Tumors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced or Metastatic Solid Tumors",
        "Breast Cancer",
        "Ovarian Cancer",
        "Prostate Cancer",
        "Endometrial Cancer",
        "Colorectal Cancer",
        "Head and Neck Cancers",
        "Extensive Stage Small Cell Lung Cancer (ES-SCLC)",
        "NSCLC"
      ],
      "interventions": [
        {
          "name": "IDE-161",
          "type": "DRUG"
        },
        {
          "name": "Pembrolizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "IDEAYA Biosciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 216,
      "start_date": "2023-04-18",
      "completion_date": "2027-05",
      "has_results": false,
      "last_update_posted_date": "2026-07-13",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 27,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • Newport Beach, California + 22 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05787587"
    },
    {
      "nct_id": "NCT03848832",
      "title": "Efficacy and Safety of Cannabidiol Oral Solution (GWP42003-P, CBD-OS) in Patients With Rett Syndrome",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Rett Syndrome",
        "RTT"
      ],
      "interventions": [
        {
          "name": "GWP42003-P",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Jazz Pharmaceuticals",
      "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": 29,
      "start_date": "2019-07-29",
      "completion_date": "2021-01-21",
      "has_results": true,
      "last_update_posted_date": "2022-09-02",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 14,
      "location_summary": "Birmingham, Alabama • San Diego, California • Aurora, Colorado + 11 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03848832"
    },
    {
      "nct_id": "NCT02455622",
      "title": "Long-term Evaluation on Height and Weight in Patients With MPS II Who Started Treatment at < 6 Years of Age",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hunter Syndrome"
      ],
      "interventions": [
        {
          "name": "Elaprase for intravenous (IV) infusion",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "5 Years",
        "sex": "MALE",
        "summary": "Up to 5 Years · Male only"
      },
      "enrollment_count": 21,
      "start_date": "2015-10-28",
      "completion_date": "2025-07-29",
      "has_results": true,
      "last_update_posted_date": "2026-04-02",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02455622"
    },
    {
      "nct_id": "NCT03836300",
      "title": "Parent and Infant Inter(X)Action Intervention (PIXI)",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Fragile X Syndrome",
        "Angelman Syndrome",
        "Prader-Willi Syndrome",
        "Dup15Q Syndrome",
        "Duchenne Muscular Dystrophy",
        "Phelan-McDermid Syndrome",
        "Rett Syndrome",
        "Smith Magenis Syndrome",
        "Williams Syndrome",
        "Turner Syndrome",
        "Klinefelter Syndrome",
        "Chromosome 22q11.2 Deletion Syndrome",
        "Tuberous Sclerosis",
        "Down Syndrome"
      ],
      "interventions": [
        {
          "name": "Parent-Infant Inter(X)action Intervention (PIXI)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "RTI International",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "Up to 99 Years"
      },
      "enrollment_count": 120,
      "start_date": "2018-11-30",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-13",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 1,
      "location_summary": "Research Triangle Park, North Carolina",
      "locations": [
        {
          "city": "Research Triangle Park",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03836300"
    },
    {
      "nct_id": "NCT04976231",
      "title": "MPS II Immunophenotyping",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "MPS II",
        "Mucopolysaccharidosis II",
        "Hunter Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 6,
      "start_date": "2022-04-01",
      "completion_date": "2024-04-26",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-07-23T22:48:57.798Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04976231"
    }
  ]
}