COMT catechol-O-methyltransferase
ENSG00000093010 · protein coding · Open Targets profile
Catalyzes the O-methylation, and thereby the inactivation, of catecholamine neurotransmitters and catechol hormones. Also shortens the biological half-lives of certain neuroactive drugs, like L-DOPA, alpha-methyl DOPA and isoproterenol. {ECO:0000269|PubMed:11559542, ECO:0000269|PubMed:21846718}.
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 Withdrawn means the drug was pulled from the market or from development.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
- Approved Drug, Structure with Ligand, High-Quality Ligand, Med-Quality Pocket, Druggable Family
- Antibody
- UniProt loc high conf, GO CC high conf, UniProt SigP or TMHMM
- PROTAC
- Database Ubiquitination, Half-life Data, Small Molecule Binder
gnomAD loss of function constraint: o/e 0.6879299879074097 (upper bound 1.0937000513076782). 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 20 registry trials, updated in the last three years, of the most advanced drugs against COMT (entacapone, nebicapone), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- Lin MaBeijing Children's Hospital · 2 of 2 trials Phase 2+
- Chun-Feng LiuSecond Affiliated Hospital of Soochow University · 1 of 1 trials Phase 2+
- Luo ZhangBeijing Tongren Hospital · 1 of 1 trials Phase 2+
- osman korucuAnkara Ataturk Sanatorium Training and Research Hospital · 1 of 1 trials Phase 2+
- Qichuan ZhugeFirst Affiliated Hospital of Wenzhou Medical University · 1 of 1 trials Phase 2+
- Qinghong ZhouSunshine Guojian Pharmaceutical (Shanghai) Co., Ltd. · 1 of 1 trials Phase 2+
- Satish R RajVanderbilt University School of Medicine · 1 of 1 trials Phase 2+
- ZiGang XuBeijing Children's Hospital · 1 of 1 trials Phase 2+
- Yu CaoThe Affiliated Hospital of Qingdao University Phase I Clinical Research Center · 0 of 1 trials Phase 2+
Registry trials of entacapone, nebicapone 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; 19 of 19 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. 1 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.
6 trials of drugs against COMT were stopped early
Terminated, withdrawn and suspended interventional trials of entacapone, nebicapone, 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 6 most recent of 6.
- terminated · 2018-09-27 · National Institute of Mental Health (NIMH) · matched by the registry's drug synonyms“Scientific Director request to use resources for other studies”
- terminated · 2014-07-17 · National Institute of Neurological Disorders and Stroke (NINDS) · Entacapone“Study terminated due to contamination droxidopa”
- terminated · 2014-07-11 · Eisai Limited · matched by the registry's drug synonyms“Study stopped due to lack of efficacy.”
- withdrawn · 2012-04-30 · Novartis Pharmaceuticals · Carbidopa/Levodopa/Entacapone“Business decision brand strategy; no patients enrolled”
- terminated · 2011-02-18 · Novartis · Carbidopa/levodopa/entacapone“slow enrollment”
- terminated · 2008-06-16 · Orion Corporation, Orion Pharma · entacapone and carbidopa“Illogistical results found in interim evaluation.”
Paediatric incentives and obligations for COMT's drugs
For entacapone, nebicapone: 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: no · COMT is not on the listRule: 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-002421-PIP01-18 (levodopa;carbidopa monohydrate;entacapone, condition not given): W: decision granting a waiver in all age groups for all conditions or indications, 3 Jan 2019Rule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA EMEA-002421-PIP01-18, 2026-11-11
- EU orphan designation: no · No EU orphan designation names entacapone, nebicaponeRule: 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 data download (dated snapshot), 2026-11-11
- Authorised in the EU: yes · Comtan: authorised since 22 Sept 1998; Corbilta (previously Levodopa/Carbidopa/Entacapone Sandoz): authorised since 11 Nov 2013; Levodopa/Carbidopa/Entacapone Orion: authorised since 23 Aug 2011; Stalevo: authorised since 17 Oct 2003; +3 moreRule: 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 data download (dated snapshot), 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 entacapone, nebicaponeRule: 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 · 3 interventional studies of entacapone, nebicapone include patients under 18; 2 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.
| Drug | Type | Highest stage | Indications | Source records |
|---|---|---|---|---|
| ENTACAPONE | Small molecule | phase 4 | Parkinson disease, restless legs syndrome, cocaine dependence, orthostatic intolerance, orthostatic hypotension, major depressive disorder, Fatigue, depressive disorder, +3 more | Open Targets · ChEMBL |
| NEBICAPONE | Small molecule | phase 2 | Parkinson disease | Open Targets · ChEMBL |
| TOLCAPONE | Small molecule | withdrawal | Parkinson disease, liver failure, obsessive-compulsive disorder, schizophrenia, frontotemporal dementia, gambling behaviour, nicotine dependence, alcohol dependence, +6 more | Open Targets · ChEMBL |
| OPICAPONE | Small molecule | withdrawal | Parkinson disease | Open Targets · ChEMBL |