ORPHA:293633
PYCR1-related De Barsy syndrome
Also known as: PYCR1 deficiency · Pyrroline-5-carboxylate reductase 1 deficiency
Publications
1,597
Trials
0
Interventional, condition-specific
Researchers
262
Distinct authors in sample
Gene link
PYCR1
Definitive
Readiness
3/6
Stages with a signal
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0013755
- OMIM:614438
- UMLS:C3280799
Additional Mondo synonyms (4)
ARCL3B · PYCR1 de Barsy syndrome · de Barsy syndrome caused by mutation in PYCR1 · pyrroline-5-carboxylate reductase 1 deficiency
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
3/6 stages with a signal
No matched interventional trial; the gene is known and literature exists — preclinical or natural-history work may still be the practical next step.
- Gene identifiedPresent
Definitive — PYCR1
- LiteraturePresent
1,597 matched papers (1,346 in last 10 years) Source
- Phenotype characterisedPresent
35 HPO annotations (e.g. Flexion contracture; Sparse hair; Osteopenia) Source
- Animal modelNot found
No Alliance genotype “model of” associations via Monarch for these Mondo IDs
- Orphan designationNot found
No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Yes — we know a specific gene responsible (PYCR1).
GenCC classification: Definitive.
Phenotypes (Monarch / HPO)
35
Associated phenotypes · MONDO:0013755
- Flexion contracture
- Sparse hair
- Osteopenia
- Large fontanelles
- Hypertelorism
Showing 5 of 35 — open Monarch for the full list.
Animal models (Monarch / Alliance)
None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.
Monarch fetch 2026-07-29
Therapies
Designations, candidates, and chemicals
FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.
Orphan designation (FDA · EMA)
No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.
Open Targets candidates
No drugs or clinical candidates returned for this Mondo ID on Open Targets.
CTD chemicals (MyDisease.info)
No CTD chemical associations returned for this Mondo ID.
Literature
Is anyone studying this?
1,597
1,597 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.
1,597 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).
1,346 in the last 10 years · low confidence
Phrase hits: 26 · MeSH hits: 0
Who's working on it?
262
Distinct author names in 26 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Phang JM4 papers · 2019
Metabolism and Cancer Susceptibility Section, Laboratory of Comparative Carcinogenesis, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA. phangj@mail.nih.gov
Papers in Europe PMC - 02Escande-Beillard N3 papers · 2022
Institute of Medical Biology, A*STAR, Singapore 138648, Singapore. nathalie.escande@reversade.com.
Papers in Europe PMC - 03Gardeitchik T3 papers · 2018
Department of Pediatrics, Radboud University Nijmegen Medical Center, Nijmegen, Gelderland 9102-6500, The Netherlands. Thatjana.Gardeitchik@radboudumc.nl.
Papers in Europe PMC - 04Liu W3 papers · 2015
Metabolism and Cancer Susceptibility Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, National Institutes of Health, Frederick, MD 21702, USA.
Papers in Europe PMC - 05Loh A3 papers · 2022
Institute of Medical Biology, A*STAR, Singapore 138648, Singapore. abigail.loh@reversade.com.
Papers in Europe PMC - 06Morava E3 papers · 2018
Department of Pediatrics, Radboud University Nijmegen Medical Center, Nijmegen, Gelderland 9102-6500, The Netherlands. emoravakozicz@tulane.edu.
Papers in Europe PMC - 07Reversade B3 papers · 2022
Institute of Medical Biology, A*STAR, Singapore 138648, Singapore. bruno@reversade.com.
Papers in Europe PMC - 08Bozorgmehr B2 papers · 2017
Kariminejad-Najmabadi Pathology & Genetics Center, #2, 4th Street, Hasan Seyf Street, Sanat Square, Tehran 14667-13713, Iran. b_bzwr@yahoo.com.
Papers in Europe PMC - 09Fischer-Zirnsak B2 papers · 2021
Institut für Medizinische Genetik und Humangenetik, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Papers in Europe PMC - 10Guo P2 papers · 2025
Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, Hunan Province, 410078, China.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present).
Data as of 11 September 2026 · last trial check 11 September 2026
No matched interventional trials. This is true for 77.2% of diseases in the trials denominator (5501 of 7126). Here are the researchers publishing on it.
low confidence · 38.6th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
Broader category de Barsy syndrome also has no matched interventional trial. See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Broader category: de Barsy syndrome
0
Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.
Parent-category matching found a broader label but no interventional trials under it. How we count trials.
Other registries (secondary)
Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.
raw 0 · after dedupe 0 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 0 · dropped 0 · fetched 2026-07-30
Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri
No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).
Where to find support
Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.
Orphanet entry for PYCR1-related De Barsy syndrome — check Associations / patient organisations on that page.
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
("PYCR1-related De Barsy syndrome" OR "PYCR1 deficiency" OR "Pyrroline-5-carboxylate reductase 1 deficiency" OR "ARCL3B" OR "PYCR1 de Barsy syndrome" OR "de Barsy syndrome caused by mutation in PYCR1") OR ("PYCR1" OR "PYCR1 syndrome" OR "PYCR1-related")ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"PYCR1-related De Barsy syndrome" OR "PYCR1 deficiency" OR "Pyrroline-5-carboxylate reductase 1 deficiency" OR "ARCL3B" OR "PYCR1 de Barsy syndrome" OR "de Barsy syndrome caused by mutation in PYCR1"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Parent-category trials query:
"de Barsy syndrome"
Query health: ok — strategies attempted: phrase; with hits: phrase
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
- Publication count (1597) is extremely high with unknown/missing prevalence — treat as possible over-matching, not proven research intensity
Ingested 2026-07-27T12:21:52.627Z