{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Asfotase+alfa",
    "query": {
      "intervention": "Asfotase alfa"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 14,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Asfotase+alfa&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-12T03:11:13.162Z",
  "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": "NCT01205152",
      "title": "Extension Study of Protocol ENB-002-08 - Study of Asfotase Alfa in Infants and Young Children With Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "asfotase alfa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "24 Weeks",
        "maximum_age": "42 Months",
        "sex": "ALL",
        "summary": "24 Weeks to 42 Months"
      },
      "enrollment_count": 10,
      "start_date": "2009-04",
      "completion_date": "2016-08",
      "has_results": true,
      "last_update_posted_date": "2019-03-13",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 5,
      "location_summary": "Wilmington, Delaware • Springfield, Missouri • Omaha, Nebraska + 2 more",
      "locations": [
        {
          "city": "Wilmington",
          "state": "Delaware"
        },
        {
          "city": "Springfield",
          "state": "Missouri"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Green Bay",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01205152"
    },
    {
      "nct_id": "NCT06079281",
      "title": "Phase 3 Study of ALXN1850 Versus Placebo in Adolescent and Adult Participants With HPP Who Have Not Previously Been Treated With Asfotase Alfa",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "ALXN1850",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "130 Years",
        "sex": "ALL",
        "summary": "12 Years to 130 Years"
      },
      "enrollment_count": 124,
      "start_date": "2024-01-03",
      "completion_date": "2028-03-29",
      "has_results": false,
      "last_update_posted_date": "2026-06-22",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 5,
      "location_summary": "Indianapolis, Indiana • Garden City, New York • Durham, North Carolina + 2 more",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Garden City",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06079281"
    },
    {
      "nct_id": "NCT00952484",
      "title": "Safety and Efficacy of Asfotase Alfa in Juvenile Patients With Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypophosphatasia (HPP)"
      ],
      "interventions": [
        {
          "name": "asfotase alfa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "5 Years to 12 Years"
      },
      "enrollment_count": 13,
      "start_date": "2009-09",
      "completion_date": "2010-07",
      "has_results": true,
      "last_update_posted_date": "2019-04-01",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00952484"
    },
    {
      "nct_id": "NCT02797821",
      "title": "Pharmacokinetic and Dose Response Study of Asfotase Alfa in Adult Patients With Pediatric-Onset Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "Asfotase alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 27,
      "start_date": "2016-06-06",
      "completion_date": "2017-06-21",
      "has_results": true,
      "last_update_posted_date": "2019-09-17",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 3,
      "location_summary": "St Louis, Missouri • Durham, North Carolina • Nashville, Tennessee",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02797821"
    },
    {
      "nct_id": "NCT06079359",
      "title": "Phase 3 Study of ALXN1850 in Treatment-Naïve Pediatric Participants With HPP",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "ALXN1850",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "2 Years to 11 Years"
      },
      "enrollment_count": 30,
      "start_date": "2024-05-14",
      "completion_date": "2028-08-24",
      "has_results": false,
      "last_update_posted_date": "2026-05-28",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 3,
      "location_summary": "Baltimore, Maryland • Kansas City, Missouri • Durham, North Carolina",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06079359"
    },
    {
      "nct_id": "NCT01163149",
      "title": "Safety and Efficacy Study of Asfotase Alfa in Adolescents and Adults With Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "asfotase alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "13 Years to 65 Years"
      },
      "enrollment_count": 19,
      "start_date": "2010-06",
      "completion_date": "2016-06",
      "has_results": true,
      "last_update_posted_date": "2019-03-13",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 2,
      "location_summary": "St Louis, Missouri • Durham, North Carolina",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01163149"
    },
    {
      "nct_id": "NCT02496689",
      "title": "Expanded Access Program for Asfotase Alfa Treatment for Patients With Infantile- or Juvenile-onset Hypophosphatasia (HPP)",
      "overall_status": "APPROVED_FOR_MARKETING",
      "study_type": "EXPANDED_ACCESS",
      "phases": [],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "asfotase alfa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": null,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2019-03-29",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 2,
      "location_summary": "Lakewood, Colorado • Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02496689"
    },
    {
      "nct_id": "NCT06079372",
      "title": "Phase 3 Study of ALXN1850 in Pediatric Participants With HPP Previously Treated With Asfotase Alfa",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "ALXN1850",
          "type": "DRUG"
        },
        {
          "name": "asfotase alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "2 Years to 11 Years"
      },
      "enrollment_count": 43,
      "start_date": "2024-04-02",
      "completion_date": "2028-02-29",
      "has_results": false,
      "last_update_posted_date": "2026-05-05",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 6,
      "location_summary": "Hartford, Connecticut • Baltimore, Maryland • Minneapolis, Minnesota + 3 more",
      "locations": [
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06079372"
    },
    {
      "nct_id": "NCT00739505",
      "title": "Safety Study of Human Recombinant Tissue Non-Specific Alkaline Phosphatase Fusion Protein Asfotase Alfa in Adults With Hypophosphatasia (HPP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hypophosphatasia (HPP)"
      ],
      "interventions": [
        {
          "name": "Asfotase Alfa",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 6,
      "start_date": "2008-08",
      "completion_date": "2009-02",
      "has_results": false,
      "last_update_posted_date": "2019-03-29",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 2,
      "location_summary": "St Louis, Missouri • Durham, North Carolina",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00739505"
    },
    {
      "nct_id": "NCT04195763",
      "title": "Patient Reported Outcomes in Adults With Pediatric-onset Hypophosphatasia Treated With Strensiq® (Asfotase Alfa)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypophosphatasia"
      ],
      "interventions": [
        {
          "name": "asfotase alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 50,
      "start_date": "2019-11-06",
      "completion_date": "2024-04-12",
      "has_results": false,
      "last_update_posted_date": "2024-07-10",
      "last_synced_at": "2026-09-12T03:11:13.162Z",
      "location_count": 1,
      "location_summary": "Palm Harbor, Florida",
      "locations": [
        {
          "city": "Palm Harbor",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04195763"
    }
  ]
}