{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=blood+biomarker&page=35",
    "query": {
      "intervention": "blood biomarker",
      "page": 35
    },
    "page_size": 10
  },
  "pagination": {
    "page": 35,
    "page_size": 10,
    "total_count": 1741,
    "total_pages": 175,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=blood+biomarker&page=36&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=blood+biomarker&page=34&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-17T17:46:44.207Z",
  "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": "NCT03938870",
      "title": "CNS Tau Kinetics in Healthy Aging and Alzheimer's Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alzheimer's Disease",
        "Brain Diseases",
        "Central Nervous System Diseases",
        "Delirium, Dementia, Amnestic, Cognitive Disorders",
        "Dementia",
        "Mental Disorders",
        "Nervous System Diseases",
        "Neurodegenerative Diseases",
        "Tauopathies"
      ],
      "interventions": [
        {
          "name": "L-Leucine 13C6",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 96,
      "start_date": "2015-08-18",
      "completion_date": "2023-07-06",
      "has_results": false,
      "last_update_posted_date": "2024-02-13",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03938870"
    },
    {
      "nct_id": "NCT01251172",
      "title": "RO4929097 After Autologous Stem Cell Transplant in Treating Patients With Multiple Myeloma",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "DS Stage I Plasma Cell Myeloma",
        "DS Stage II Plasma Cell Myeloma",
        "DS Stage III Plasma Cell Myeloma",
        "Refractory Plasma Cell Myeloma"
      ],
      "interventions": [
        {
          "name": "Autologous Hematopoietic Stem Cell Transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Gamma-Secretase Inhibitor RO4929097",
          "type": "DRUG"
        },
        {
          "name": "Hematopoietic Stem Cell Mobilization",
          "type": "PROCEDURE"
        },
        {
          "name": "In Vitro-Treated Peripheral Blood Stem Cell Transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Melphalan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2010-12",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2017-09-28",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01251172"
    },
    {
      "nct_id": "NCT05917665",
      "title": "Early Digital, Analyte and Neurologic Biomarkers of Acute and Chronic Brain Injury and Recovery in CQT Instructors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Traumatic Brain Injury"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Southern California",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 45,
      "start_date": "2025-08-01",
      "completion_date": "2026-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Fort Bragg, North Carolina",
      "locations": [
        {
          "city": "Fort Bragg",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05917665"
    },
    {
      "nct_id": "NCT01838265",
      "title": "Trial of Prostate Cancer Patients Undergoing Active Surveillance With or Without MRI-Guided Management",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Prostate Cancer",
        "Prostate Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Transrectal Ultrasound-Guided Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "MRI Ultrasound Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Expanded Prostate Cancer index Composite Questionnaire",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Short-Form 12 of Health Related Quality of Life Questionnaire",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Memorial Anxiety Scale for Prostate Cancer",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Plasma/Serum Sample for biomarkers",
          "type": "PROCEDURE"
        },
        {
          "name": "Urine Sample for Biomarkers",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood Tests for Blood Urea Nitrogen and Creatinine",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood Test for Serum PSA",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "75 Years",
        "sex": "MALE",
        "summary": "35 Years to 75 Years · Male only"
      },
      "enrollment_count": 0,
      "start_date": "2012-08",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2014-12-08",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01838265"
    },
    {
      "nct_id": "NCT07594665",
      "title": "Expanding Access to Cognitive Health Biomarker Testing at Home",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mild Cognitive Impairment (MCI)",
        "Alzheimer's Dementia (AD)",
        "Subjective Cognitive Decline (SCD)",
        "Cognitive Aging"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2026-05-18",
      "completion_date": "2028-01-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-19",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Charlottesville, Virginia",
      "locations": [
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07594665"
    },
    {
      "nct_id": "NCT01319526",
      "title": "Biomarkers in Blood Samples From Patients With HIV Infection and Stage III or Stage IV Hodgkin Lymphoma Undergoing Chemotherapy",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lymphoma",
        "Nonneoplastic Condition"
      ],
      "interventions": [
        {
          "name": "DNA analysis",
          "type": "GENETIC"
        },
        {
          "name": "RNA analysis",
          "type": "GENETIC"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "OTHER"
      ],
      "sponsor": "AIDS Malignancy Consortium",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2011-06",
      "completion_date": "2013-01",
      "has_results": false,
      "last_update_posted_date": "2020-07-29",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland • Boston, Massachusetts",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01319526"
    },
    {
      "nct_id": "NCT03459755",
      "title": "Evaluating Race Specific AGE Accumulation As a Behavioral Biomarker Prostate Cancer Survivors",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Physical Activity",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "45 Years and older · Male only"
      },
      "enrollment_count": 0,
      "start_date": "2019-11-27",
      "completion_date": "2019-11-27",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03459755"
    },
    {
      "nct_id": "NCT02304458",
      "title": "Nivolumab With or Without Ipilimumab in Treating Younger Patients With Recurrent or Refractory Solid Tumors or Sarcomas",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Melanoma",
        "Recurrent Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Hodgkin Lymphoma",
        "Recurrent Malignant Solid Neoplasm",
        "Recurrent Melanoma",
        "Recurrent Neuroblastoma",
        "Recurrent Non-Hodgkin Lymphoma",
        "Recurrent Osteosarcoma",
        "Recurrent Rhabdomyosarcoma",
        "Refractory Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Refractory Hodgkin Lymphoma",
        "Refractory Malignant Solid Neoplasm",
        "Refractory Melanoma",
        "Refractory Neuroblastoma",
        "Refractory Non-Hodgkin Lymphoma",
        "Refractory Osteosarcoma",
        "Refractory Rhabdomyosarcoma",
        "Stage III Cutaneous Melanoma AJCC v7",
        "Stage IIIA Cutaneous Melanoma AJCC v7",
        "Stage IIIB Cutaneous Melanoma AJCC v7",
        "Stage IIIC Cutaneous Melanoma AJCC v7",
        "Stage IV Cutaneous Melanoma AJCC v6 and v7",
        "Unresectable Melanoma"
      ],
      "interventions": [
        {
          "name": "Ipilimumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Nivolumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "12 Months to 30 Years"
      },
      "enrollment_count": 140,
      "start_date": "2015-03-30",
      "completion_date": "2023-03-31",
      "has_results": true,
      "last_update_posted_date": "2023-10-17",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 24,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • Orange, California + 21 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02304458"
    },
    {
      "nct_id": "NCT04908852",
      "title": "Feasibility Pilot Exploring Variability in Biomarkers and PROs in AML",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Myeloid Leukemia (AML)"
      ],
      "interventions": [
        {
          "name": "Blood Sample Collection - Observational Study",
          "type": "OTHER"
        },
        {
          "name": "Symptom questionnaires - Observational Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Dana-Farber Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2021-07-26",
      "completion_date": "2023-02-23",
      "has_results": false,
      "last_update_posted_date": "2023-04-05",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04908852"
    },
    {
      "nct_id": "NCT01198158",
      "title": "Everolimus With or Without Bevacizumab in Treating Patients With Advanced Kidney Cancer That Progressed After First-Line Therapy",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Clear Cell Renal Cell Carcinoma",
        "Recurrent Renal Cell Carcinoma",
        "Stage III Renal Cell Cancer AJCC v7",
        "Stage IV Renal Cell Cancer AJCC v7"
      ],
      "interventions": [
        {
          "name": "Bevacizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Everolimus",
          "type": "DRUG"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 77,
      "start_date": "2010-09-15",
      "completion_date": "2017-12-16",
      "has_results": true,
      "last_update_posted_date": "2019-03-06",
      "last_synced_at": "2026-10-17T17:46:44.207Z",
      "location_count": 524,
      "location_summary": "Scottsdale, Arizona • Jonesboro, Arkansas • Little Rock, Arkansas + 354 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Antioch",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01198158"
    }
  ]
}