{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=ESRA-C", "query": { "intervention": "ESRA-C" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 35, "total_pages": 4, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=ESRA-C&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-03T22:17:57.483Z", "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": "NCT05768139", "title": "First-in-Human Study of Tersolisib (STX-478) as Monotherapy and in Combination With Other Antineoplastic Agents in Participants With Advanced Solid Tumors", "overall_status": "RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Breast Cancer", "Solid Tumors, Adult" ], "interventions": [ { "name": "STX-478", "type": "DRUG" }, { "name": "Fulvestrant", "type": "DRUG" }, { "name": "Ribociclib", "type": "DRUG" }, { "name": "Palbociclib", "type": "DRUG" }, { "name": "Letrozole", "type": "DRUG" }, { "name": "Anastrozole", "type": "DRUG" }, { "name": "Exemestane", "type": "DRUG" }, { "name": "Tamoxifen", "type": "DRUG" }, { "name": "Abemaciclib", "type": "DRUG" }, { "name": "Imlunestrant", "type": "DRUG" }, { "name": "Metformin", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Eli Lilly and Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 880, "start_date": "2023-04-17", "completion_date": "2030-07", "has_results": false, "last_update_posted_date": "2026-07-07", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 28, "location_summary": "Los Angeles, California • San Francisco, California • Aurora, Colorado + 22 more", "locations": [ { "city": "Los Angeles", "state": "California" }, { "city": "San Francisco", "state": "California" }, { "city": "Aurora", "state": "Colorado" }, { "city": "New Haven", "state": "Connecticut" }, { "city": "Lake Mary", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05768139" }, { "nct_id": "NCT03284957", "title": "Phase 1/2 Study of Amcenestrant (SAR439859) Single Agent and in Combination With Other Anti-cancer Therapies in Postmenopausal Women With Estrogen Receptor Positive Advanced Breast Cancer", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Breast Cancer" ], "interventions": [ { "name": "Amcenestrant", "type": "DRUG" }, { "name": "Palbociclib", "type": "DRUG" }, { "name": "Alpelisib", "type": "DRUG" }, { "name": "Everolimus", "type": "DRUG" }, { "name": "Abemaciclib", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Sanofi", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "FEMALE", "summary": "18 Years and older · Female only" }, "enrollment_count": 136, "start_date": "2017-09-20", "completion_date": "2024-11-08", "has_results": true, "last_update_posted_date": "2025-11-24", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 4, "location_summary": "Aurora, Colorado • Boston, Massachusetts • New York, New York + 1 more", "locations": [ { "city": "Aurora", "state": "Colorado" }, { "city": "Boston", "state": "Massachusetts" }, { "city": "New York", "state": "New York" }, { "city": "Seattle", "state": "Washington" } ], "official_url": "https://clinicaltrials.gov/study/NCT03284957" }, { "nct_id": "NCT06993844", "title": "Phase 1/2 Study of ETX-636 in Participants With Advanced Solid Tumors", "overall_status": "RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Advanced Solid Tumors", "Advanced Breast Cancer" ], "interventions": [ { "name": "ETX-636 dose escalation", "type": "DRUG" }, { "name": "ETX-636 dose escalation in combination with fulvestrant", "type": "DRUG" }, { "name": "ETX-636 dose expansion in combination with fulvestrant", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Ensem Therapeutics", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 233, "start_date": "2025-06-10", "completion_date": "2027-12-30", "has_results": false, "last_update_posted_date": "2026-06-23", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 10, "location_summary": "Newport Beach, California • San Francisco, California • New Haven, Connecticut + 6 more", "locations": [ { "city": "Newport Beach", "state": "California" }, { "city": "San Francisco", "state": "California" }, { "city": "New Haven", "state": "Connecticut" }, { "city": "Boston", "state": "Massachusetts" }, { "city": "Boston", "state": "Massachusetts" } ], "official_url": "https://clinicaltrials.gov/study/NCT06993844" }, { "nct_id": "NCT05826964", "title": "Levels of Circulating Tumor DNA as a Predictive Marker for Early Switch in Treatment for Patients With Metastatic (Stage IV) Breast Cancer", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Breast Cancer", "ER-positive Breast Cancer", "HER2-negative Breast Cancer", "Metastatic Breast Cancer" ], "interventions": [ { "name": "AI+CDK4/6i", "type": "DRUG" }, { "name": "SERD+CDK4/6i", "type": "DRUG" }, { "name": "mTOR inhibitor + AI", "type": "DRUG" }, { "name": "mTOR inhibitor + SERD", "type": "DRUG" }, { "name": "mTOR inhibitor + Selective estrogen receptor modulator", "type": "DRUG" }, { "name": "PI3K inhibitor + SERD", "type": "DRUG" }, { "name": "PI3K inhibitor + AI", "type": "DRUG" }, { "name": "Chemotherapy", "type": "DRUG" }, { "name": "Oral SERD", "type": "DRUG" }, { "name": "PARPi", "type": "DRUG" }, { "name": "AKT inhibitor", "type": "DRUG" }, { "name": "Step 3 Arm 2", "type": "OTHER" } ], "intervention_types": [ "DRUG", "OTHER" ], "sponsor": "University of Miami", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 24, "start_date": "2023-06-12", "completion_date": "2029-07-31", "has_results": false, "last_update_posted_date": "2026-01-13", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 1, "location_summary": "Miami, Florida", "locations": [ { "city": "Miami", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05826964" }, { "nct_id": "NCT04072952", "title": "A Phase 1/2 Trial of ARV-471 Alone and in Combination With Palbociclib (IBRANCE®) in Patients With ER+/HER2- Locally Advanced or Metastatic Breast Cancer", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Breast Cancer" ], "interventions": [ { "name": "ARV-471", "type": "DRUG" }, { "name": "ARV-471 in combination with palbociclib (IBRANCE®)", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Arvinas Estrogen Receptor, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 217, "start_date": "2019-08-05", "completion_date": "2026-03-05", "has_results": false, "last_update_posted_date": "2026-04-15", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 16, "location_summary": "Palo Alto, California • San Francisco, California • Santa Monica, California + 12 more", "locations": [ { "city": "Palo Alto", "state": "California" }, { "city": "San Francisco", "state": "California" }, { "city": "Santa Monica", "state": "California" }, { "city": "Norwalk", "state": "Connecticut" }, { "city": "Fort Myers", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT04072952" }, { "nct_id": "NCT01344031", "title": "MK2206 in Combination With Anastrozole, Fulvestrant, or Anastrozole and Fulvestrant in Treating Postmenopausal Women With Metastatic Breast Cancer", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Estrogen Receptor Positive", "Invasive Breast Carcinoma", "Recurrent Breast Carcinoma", "Stage IV Breast Cancer AJCC v6 and v7" ], "interventions": [ { "name": "Akt Inhibitor MK2206", "type": "DRUG" }, { "name": "Anastrozole", "type": "DRUG" }, { "name": "Fulvestrant", "type": "DRUG" }, { "name": "Laboratory Biomarker Analysis", "type": "OTHER" } ], "intervention_types": [ "DRUG", "OTHER" ], "sponsor": "National Cancer Institute (NCI)", "sponsor_class": "NIH", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "FEMALE", "summary": "18 Years and older · Female only" }, "enrollment_count": 31, "start_date": "2011-04-21", "completion_date": null, "has_results": false, "last_update_posted_date": "2018-07-23", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 1, "location_summary": "St Louis, Missouri", "locations": [ { "city": "St Louis", "state": "Missouri" } ], "official_url": "https://clinicaltrials.gov/study/NCT01344031" }, { "nct_id": "NCT04505826", "title": "A Dose Escalation/Expansion Study of Oral OP-1250 in Subjects With Advanced and/or Metastatic HR+, HER2- Breast Cancer", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1", "PHASE2" ], "conditions": [ "Hormone Receptor Positive Breast Carcinoma", "HER2-negative Breast Cancer" ], "interventions": [ { "name": "OP-1250", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Olema 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": 153, "start_date": "2020-08-13", "completion_date": "2024-07-30", "has_results": true, "last_update_posted_date": "2026-05-11", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 15, "location_summary": "Los Angeles, California • Aurora, Colorado • Deerfield Beach, Florida + 11 more", "locations": [ { "city": "Los Angeles", "state": "California" }, { "city": "Aurora", "state": "Colorado" }, { "city": "Deerfield Beach", "state": "Florida" }, { "city": "Orlando", "state": "Florida" }, { "city": "Sarasota", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT04505826" }, { "nct_id": "NCT04584255", "title": "Niraparib + Dostarlimab In BRCA Mutated Breast Cancer", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Stage I Breast Cancer", "Stage II Breast Cancer", "Stage III Breast Cancer", "Breast Cancer", "HER2-negative Breast Cancer", "Germline BRCA1 Gene Mutation", "Germline BRCA2 Gene Mutation", "Deleterious PALB2 Gene Mutation" ], "interventions": [ { "name": "Niraparib", "type": "DRUG" }, { "name": "Dostarlimab", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "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": 62, "start_date": "2020-12-18", "completion_date": "2029-07-17", "has_results": false, "last_update_posted_date": "2026-05-13", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 8, "location_summary": "New Haven, Connecticut • Baltimore, Maryland • Boston, Massachusetts + 3 more", "locations": [ { "city": "New Haven", "state": "Connecticut" }, { "city": "Baltimore", "state": "Maryland" }, { "city": "Boston", "state": "Massachusetts" }, { "city": "Boston", "state": "Massachusetts" }, { "city": "Boston", "state": "Massachusetts" } ], "official_url": "https://clinicaltrials.gov/study/NCT04584255" }, { "nct_id": "NCT02684032", "title": "A Study To Assess The Tolerability And Clinical Activity Of Gedatolisib In Combination With Palbociclib/Letrozole Or Palbociclib/Fulvestrant In Women With Metastatic Breast Cancer", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Breast Cancer" ], "interventions": [ { "name": "Gedatolisib", "type": "DRUG" }, { "name": "Palbociclib", "type": "DRUG" }, { "name": "Letrozole", "type": "DRUG" }, { "name": "Fulvestrant", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Celcuity Inc", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "FEMALE", "summary": "18 Years and older · Female only" }, "enrollment_count": 141, "start_date": "2016-06-14", "completion_date": "2022-01-19", "has_results": false, "last_update_posted_date": "2022-07-27", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 41, "location_summary": "Birmingham, Alabama • Corona, California • Fountain Valley, California + 17 more", "locations": [ { "city": "Birmingham", "state": "Alabama" }, { "city": "Birmingham", "state": "Alabama" }, { "city": "Corona", "state": "California" }, { "city": "Fountain Valley", "state": "California" }, { "city": "Los Angeles", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02684032" }, { "nct_id": "NCT01339442", "title": "BKM120 and Fulvestrant for Treating Postmenopausal Patients With Estrogen Receptor-Positive Stage IV Breast Cancer", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Estrogen Receptor-positive Breast Cancer", "Recurrent Breast Cancer", "Stage IV Breast Cancer" ], "interventions": [ { "name": "BKM120", "type": "DRUG" }, { "name": "Fulvestrant", "type": "DRUG" }, { "name": "biopsy", "type": "PROCEDURE" } ], "intervention_types": [ "DRUG", "PROCEDURE" ], "sponsor": "Washington University School of Medicine", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "FEMALE", "summary": "18 Years and older · Female only" }, "enrollment_count": 31, "start_date": "2011-11-14", "completion_date": "2016-12-28", "has_results": false, "last_update_posted_date": "2017-01-25", "last_synced_at": "2026-09-03T22:17:57.483Z", "location_count": 1, "location_summary": "St Louis, Missouri", "locations": [ { "city": "St Louis", "state": "Missouri" } ], "official_url": "https://clinicaltrials.gov/study/NCT01339442" } ] }