SV2A synaptic vesicle glycoprotein 2A
ENSG00000159164 · protein coding · Open Targets profile
Plays a role in the control of regulated secretion in neural and endocrine cells, enhancing selectively low-frequency neurotransmission. Positively regulates vesicle fusion by maintaining the readily releasable pool of secretory vesicles (By similarity). .
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 Withdrawn means the drug was pulled from the market or from development.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, Druggable Family
- Antibody
- GO CC high conf, UniProt SigP or TMHMM
- PROTAC
- Database Ubiquitination, Half-life Data
gnomAD loss of function constraint: o/e 0.32030999660491943 (upper bound 0.44736000895500183). 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 91 registry trials, updated in the last three years, of the most advanced drugs against SV2A (brivaracetam, levetiracetam, seletracetam, padsevonil), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- UCB Cares001 844 599 2273 (UCB) · 11 of 13 trials Phase 2+Ph3NCT04666610 · A Study to Evaluate the Efficacy, Safety, and Tolerability of Brivaracetam as Monotherapy in Patients 2 to 25 Years of Age With Childhood Absence Epilepsy or Juvenile Absence Epilepsybrief
- Arnold BakkerJohns Hopkins University · 2 of 2 trials Phase 2+
- Jong Woo LeeBrigham and Women's Hospital · 2 of 2 trials Phase 2+
- Aditya S PandeyUniversity of Michigan · 1 of 1 trials Phase 2+
- Apinderpreet Singh Additional ProfessorPost Graduate Institute of Medical Education and Research, Chandigarh · 1 of 1 trials Phase 2+
- Archya DasguptaTata Memorial Centre Mumbai · 1 of 1 trials Phase 2+
- Arjune SenNuffield Department of Clinical Neurosciences · 1 of 1 trials Phase 2+
- Ayal A AizerDana-Farber/Brigham and Women's Cancer Center · 1 of 1 trials Phase 2+
- Craig AndersonFudan University · 1 of 1 trials Phase 2+
- Cynthia M SharpeAuckland City Hospital · 1 of 1 trials Phase 2+
- Donald GoffNYU Langone Health · 1 of 1 trials Phase 2+
- Dr Kazi Gias Uddin AhmedProfessor of Neurology, Dhaka Medical College · 1 of 1 trials Phase 2+
- Emilio G. CedielUNC-Chapel Hill · 1 of 1 trials Phase 2+
- Ettore BeghiIstituto Di Ricerche Farmacologiche Mario Negri · 1 of 1 trials Phase 2+
- Gang LiTongji University, School of Medicine, Shanghai East Hospital · 1 of 1 trials Phase 2+
Registry trials of brivaracetam, levetiracetam, seletracetam, padsevonil 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; 73 of 88 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. 3 trials list no sites and are left out. Source: ClinicalTrials.gov, fetched live.
46 trials of drugs against SV2A were stopped early; 7 give no reason
Terminated, withdrawn and suspended interventional trials of brivaracetam, levetiracetam, seletracetam, padsevonil, 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 25 most recent of 46.
- terminated · 2026-06-03 · University of Rochester · Brivaracetam“lack of enrollment”
- terminated · 2025-11-14 · University of North Carolina, Chapel Hill · Levetiracetam“Low recruitment”
- withdrawn · 2025-05-25 · AgeneBio · matched by the registry's drug synonyms“Sponsor decision”
- terminated · 2024-04-08 · UCB Biopharma SRL · Brivaracetam (BRV) intravenous (iv), Brivaracetam (BRV) oral“Terminated (The study stopped prematurely due to enrolment challenges, the termination was not linked to any safety issues.)”
- terminated · 2023-12-29 · Children's Hospital of Fudan University · Oral levetiracetam“The study was concluded as planned upon reaching its predetermined endpoint, which included the completion of data collection and achievement of the necessary sample size for statistical significance.”
- terminated · 2023-04-13 · Duke University · Levetiracetam“Did not enroll as planned”
- terminated · 2022-12-21 · UCB Biopharma SRL · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizure”
- withdrawn · 2022-06-27 · Assistance Publique Hopitaux De Marseille · matched by the registry's drug synonyms“concomitant decision of the sponsor and the PI, lack of patients”
- terminated · 2021-12-29 · UCB Biopharma SRL · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizure”
- withdrawn · 2021-11-16 · University of South Florida · levetiracetam“Study withdrawn due to personnel limitations.”
- terminated · 2021-08-05 · Vanderbilt University Medical Center · Levetiracetam 500 mg“Study was redesigned and submitted as a new protocol (NCT04559529).”
- terminated · 2021-07-28 · UCB Biopharma S.P.R.L. · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizures”
- terminated · 2021-06-24 · UCB Biopharma SRL · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizures”
- terminated · 2021-06-18 · UCB Biopharma S.P.R.L. · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizures”
- terminated · 2021-06-18 · UCB Biopharma S.P.R.L. · Padsevonil“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizures”
- terminated · 2021-04-13 · Masonic Cancer Center, University of Minnesota · matched by the registry's drug synonymsNo reason given
- terminated · 2020-11-02 · King's College London · Levetiracetam“Following the internal pilot, the study did not meet prespecified stop/go criteria for continuation.”
- withdrawn · 2020-06-22 · UCB Biopharma SRL · Padsevonil type 1 Tablet 200 mg, Padsevonil type 2 Tablet, Padsevonil type 3 Tablet, Padsevonil type 4 Tablet, Padsevonil type 5 Tablet“Based on available data, UCB has decided to stop development of padsevonil as adjunctive treatment of focal-onset seizures”
- terminated · 2019-04-17 · Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins · Levetiracetam“Initiation of CMS BMT study for sickle-cell disease operating under NCT01166009 made further accrual to this study impossible.”
- terminated · 2018-11-23 · University of South Florida · matched by the registry's drug synonyms“Sponsor decided to stop enrollment to review data.”
- terminated · 2018-07-11 · UCB Pharma · Brivaracetam“An interim analysis revealed the study was unlikely to attain a positive outcome for the efficacy analysis. No safety concerns were detected.”
- terminated · 2018-07-11 · UCB BIOSCIENCES, Inc. · Brivaracetam intravenous solution, Brivaracetam oral tablets“Termination of study due to low enrollment. There were no safety issues.”
- terminated · 2018-07-11 · UCB Pharma · Brivaracetam“An interim analysis revealed the study was unlikely to attain a positive outcome for the efficacy analysis. No safety concerns were detected”
- withdrawn · 2018-06-07 · Medical University of South Carolina · levetiracetamNo reason given
- terminated · 2018-02-28 · Hannover Medical School · LevetiracetamNo reason given
Paediatric incentives and obligations for SV2A's drugs
For brivaracetam, levetiracetam, seletracetam, padsevonil: 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 · SV2A 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 · EMA/PE/0000240232 (Brivaracetam, Treatment of neonatal seizures;Treatment of paediatric epilepsy syndromes): PM: decision on the application for modification of an agreed PIP, 16 May 2025; EMEA-000332-PIP01-08-M16 (Brivaracetam, Treatment of epilepsy with partial-onset seizures): PM: decision on the application for modification of an agreed PIP, 9 Apr 2021; compliance positive 14 Oct 2022; EMEA-000332-PIP01-08-M15 (Brivaracetam, Treatment of epilepsy with partial-onset seizures;Treatment of neonatal seizures): PM: decision on the application for modification of an agreed PIP, 12 Aug 2020Rule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA data download (dated snapshot), 2026-11-11
- EU orphan designation: no · No EU orphan designation names brivaracetam, levetiracetam, seletracetam, padsevonilRule: 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 · Keppra: authorised since 29 Sept 2000; Briviact (in Italy: Nubriveo): authorised since 13 Jan 2016; Levetiracetam Actavis: authorised since 3 Oct 2011; Levetiracetam Teva: authorised since 25 Aug 2011; +7 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 brivaracetam, levetiracetam, seletracetam, padsevonilRule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-12
- Registered studies open to children: yes · 137 interventional studies of brivaracetam, levetiracetam, seletracetam, padsevonil include patients under 18; 12 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, 2026-11-12
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 |
|---|---|---|---|---|
| BRIVARACETAM | Small molecule | approval | epilepsy, Seizure, Focal impaired awareness seizure, Pain, Unverricht-Lundborg syndrome, Myoclonus, Focal-onset seizure, Generalized-onset seizure, +9 more | Open Targets · ChEMBL |
| LEVETIRACETAM | Small molecule | phase 4 | epilepsy, Seizure, Bilateral tonic-clonic seizure, fibromyalgia, alcohol withdrawal, Focal-onset seizure, Generalized non-motor (absence) seizure, Generalized-onset seizure, +45 more | Open Targets · ChEMBL |
| SELETRACETAM | Small molecule | phase 3 | epilepsy | Open Targets · ChEMBL |
| PADSEVONIL | Small molecule | phase 3 | Focal-onset seizure, epilepsy, focal epilepsy, Seizure | Open Targets · ChEMBL |