FOLR1 folate receptor alpha
ENSG00000110195 · protein coding · Open Targets profile
Binds to folate and reduced folic acid derivatives and mediates delivery of 5-methyltetrahydrofolate and folate analogs into the interior of cells (PubMed:19074442, PubMed:23851396, PubMed:23934049, PubMed:2527252, PubMed:8033114, PubMed:8567728). Has high affinity for folate and folic acid analogs at neutral pH (PubMed:23851396, PubMed:23934049, PubMed:2527252, PubMed:8033114, PubMed:8567728). Exposure to slightly acidic pH after receptor endocytosis triggers a conformation change that strongly reduces its affinity for folates and mediates their release (PubMed:8567728). Required for normal embryonic development and normal cell proliferation (By similarity). {ECO:0000250|UniProtKB:P35846, ECO:0000269|PubMed:19074442, ECO:0000269|PubMed:23851396, ECO:0000269|PubMed:23934049, ECO:0000269|PubMed:2527252, ECO:0000269|PubMed:8033114, ECO:0000269|PubMed:8567728}.
Each band is a group of drugs. It runs from the kind of drug on the left to the furthest stage that drug has reached in any disease on the right. Thicker bands mean more drugs.
Approved bands are highlighted. Withdrawn means the drug was pulled from the market or from development. A combined phase counts as the later one (Phase 1/2 is shown as Phase 2). Hover a band for the drug names. Source: Open Targets Platform, fetched live.
Each row is a cancer, strongest overall evidence first. The two dots show how strong the inherited (germline) and tumour-mutation (somatic) evidence is; the line between them is the gap.
Scores run from 0 (no evidence) to 1 (strongest). A missing dot at 0 means Open Targets holds no evidence of that kind. Source: Open Targets Platform, fetched live.
Tractability
- Small molecule
- Structure with Ligand, High-Quality Ligand
- Antibody
- Advanced Clinical, UniProt loc high conf, UniProt SigP or TMHMM, GO CC med conf
- PROTAC
- Small Molecule Binder
- Other modalities
- Approved Drug
gnomAD loss of function constraint: o/e 0.4820899963378906 (upper bound 0.7979599833488464). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.
Who runs trials of these drugs
Principal investigators and study chairs on 29 registry trials, updated in the last three years, of the most advanced drugs against FOLR1 (vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximab), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- Alessandro D. SantinYale University · 1 of 1 trials Phase 2+
- Bradley CorrUniversity of Colorado, Denver · 1 of 1 trials Phase 2+
- Michael MethodImmunoGen, Inc. · 1 of 1 trials Phase 2+
- Philipp HarterEvangelische Kliniken Essen-Mitte, Germany · 1 of 1 trials Phase 2+
- Rebecca ArendUniversity of Alabama at Birmingham · 1 of 1 trials Phase 2+
- Rebecca PorterDana-Farber Cancer Institute · 1 of 1 trials Phase 2+
- Robert ColemanThe US Oncology Network · 1 of 1 trials Phase 2+
- Ursula MatulonisDana-Farber Cancer Institute · 1 of 1 trials Phase 2+
- Edward W WangCity of Hope Medical Center · 0 of 1 trials Phase 2+
- Floor BackesOhio State University Comprehensive Cancer Center · 0 of 1 trials Phase 2+
Registry trials of vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximab updated in the last three years, counted by the country group of their listed sites. A trial with sites in several groups counts in each; 12 of 27 have all sites in one country.
Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where sites are is a fact about the record, not a judgement of its quality. Europe is the EU and EEA, the UK and Switzerland. 2 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.
12 trials of drugs against FOLR1 were stopped early; 3 give no reason
Terminated, withdrawn and suspended interventional trials of vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximab, newest update first, live from ClinicalTrials.gov. Each reason is quoted exactly as the registry gives it; we do not sort reasons into safety, efficacy or business. Dates are the last registry update. Showing the 12 most recent of 12.
- terminated · 2026-10-28 · Bristol-Myers Squibb · matched by the registry's drug synonyms“Business objectives have changed.”
- terminated · 2025-09-04 · Bristol-Myers Squibb · matched by the registry's drug synonyms“Business objectives have changed”
- terminated · 2022-12-30 · Morphotek · Farletuzumab, Farletuzumab-matched placebo“Lack of efficacy”
- terminated · 2021-12-08 · Morphotek · matched by the registry's drug synonyms“Study was terminated by sponsor due to futile results in NCT00849667 study.”
- terminated · 2021-09-30 · Endocyte · matched by the registry's drug synonyms“DSMB decision”
- withdrawn · 2019-06-27 · University of Oklahoma · Mirvetuximab Soravtansine“Study was not initiated.”
- withdrawn · 2018-07-05 · Duke University · Mirvetuximab Soravtansine (IMGN853)“Inadequate enrollment”
- terminated · 2017-03-30 · Morphotek · MORAb-003 (farletuzumab)“study did not meet pre-specified criteria for continuation following interim futility analysis”
- terminated · 2015-02-10 · Endocyte · VintafolideNo reason given
- terminated · 2015-02-10 · Endocyte · VintafolideNo reason given
- withdrawn · 2014-12-19 · Endocyte · Vintafolide 2.5 mgNo reason given
- withdrawn · 2013-11-04 · Morphotek · Farletuzumab“Trial terminated due to focus of primary therapeutic areas.”
Paediatric incentives and obligations for FOLR1's drugs
For vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximab: what EMA and FDA publish about paediatric plans, orphan status and pediatric approvals, and how many registered studies take children. Each line is a yes, no or not published fact from the record linked under it; none of it is a forecast.
- FDA pediatric target list: yes · FOLR1 is on the list. Membership alone neither requires nor waives a pediatric study.Rule: Target is on FDA's Pediatric Molecular Target List (relevant targets). Source: FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01)), 2026-11-11
- EU paediatric investigation plan: yes · EMEA-001921-PIP01-16 (mirvetuximab soravtansine, Treatment of fallopian tube cancer;Treatment of ovarian carcinoma;Treatment of peritoneal carcinoma): W: decision granting a waiver in all age groups for all conditions or indications, 31 Jan 2017Rule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA EMEA-001921-PIP01-16, 2026-11-11
- EU orphan designation: yes · EU/3/15/1458 positive 19 Mar 2015: Treatment of ovarian cancerRule: An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status. Source: EMA EU/3/15/1458, 2026-11-11
- Authorised in the EU: yes · Elahere: authorised since 14 Nov 2024, orphan medicineRule: An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file. Source: EMA EPAR Elahere, 2026-11-11
- FDA orphan designation: not published · FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the linkRule: Would be: an FDA orphan designation names the drug. Source: FDA orphan designations search
- FDA pediatric oncology approval: no · FDA's table lists no pediatric approval of vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximabRule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-11
- Registered studies open to children: yes · 1 interventional studies of vintafolide, mirvetuximab soravtansine, farletuzumab, mirvetuximab include patients under 18; 0 are recruiting, not yet recruiting or activeRule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-11
Rare pediatric disease voucher. FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news. FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs
All 4 drugs and clinical candidates as a table
Each drug, stage and indication links to its Open Targets record, where the trials and approvals behind it are listed. Salt forms (for example a mesylate) are listed as Open Targets records them, as separate entries.