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ORPHA:98762

Spinocerebellar ataxia type 12

low confidenceDisorder

Also known as: SCA12

Publications

1,722

Trials

0

Interventional, condition-specific

Researchers

1,144

Distinct authors in sample

Gene link

PPP2R2B

Strong

Readiness

3/6

Stages with a signal

Clinical definition (Orphanet)

Spinocerebellar type 12 (SCA12) is a very rare subtype of type I cerebellar (ADCA type I). It is characterized by the presence of action tremor associated with relatively mild cerebellar . Associated pyramidal and extrapyramidal signs and dementia have been reported.

How rare: <1 / 1 000 000 — fewer than one in a million. In a city the size of Kolkata, that might mean on the order of fifteen people.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Additional Mondo synonyms (1)

spinocerebellar ataxia type 12

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.

  1. Gene identifiedPresent

    Strong — PPP2R2B

  2. LiteraturePresent

    1,722 matched papers (1,125 in last 10 years) Source

  3. Phenotype characterisedPresent

    39 HPO annotations (e.g. Limb dysmetria; Intention tremor; Unsteady gait) Source

  4. Animal modelNot found

    No Alliance genotype “model of” associations via Monarch for these Mondo IDs

  5. Orphan designationNot found

    No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source

  6. 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 (PPP2R2B).

GenCC classification: Strong.

Phenotypes (Monarch / HPO)

39

Associated phenotypes · MONDO:0011439

  • Limb dysmetria
  • Intention tremor
  • Unsteady gait
  • Abnormal pyramidal sign
  • Cerebellar atrophy

Showing 5 of 39 — 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?

1,722

1,722 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.

1,722 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).

1,125 in the last 10 years · low confidence

Phrase hits: 700 · MeSH hits: 1

Open Europe PMC search

Who's working on it?

1,144

Distinct author names in 200 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.

  1. 01
    Srivastava AK23 papers · 2026

    Neurology Department, Neurosciences Centre, All India Institute of Medical Sciences, New Delhi 110029, India.

    Papers in Europe PMC
  2. 02
    Faruq M19 papers · 2025

    Genomics and Molecular Medicine Council of Scientific and Industrial Research Institute of Genomics and Integrative Biology New Delhi India.

    Papers in Europe PMC
  3. 03
    Margolis RL12 papers · 2024

    Professor, Psychiatry and Neurology, Director, Laboratory of Genetic Neurobiology, Division of Neurobiology, Department of Psychiatry, Johns Hopkins University, Baltimore, Maryland

    Papers in Europe PMC
  4. 04
    Pandey S9 papers · 2026

    Department of Neurology and Stroke Medicine Amrita Hospital Faridabad, Delhi NCR India.

    Papers in Europe PMC
  5. 05
    Choudhury S7 papers · 2026

    Department of Neurology Institute of Neurosciences Kolkata Kolkata India.

    Papers in Europe PMC
  6. 06
    Garg A7 papers · 2026

    All India Institute of Medical Sciences New Delhi India.

    Papers in Europe PMC
  7. 07
    Kumar H7 papers · 2026

    Department of Neurology Institute of Neurosciences Kolkata Kolkata India.

    Papers in Europe PMC
  8. 08
    Li PP7 papers · 2025

    Department of Psychiatry and Behavioral Sciences, Division of Neurobiology, Johns Hopkins University School of Medicine, CMSC 8-121, 600 N. Wolfe St, Baltimore, MD, 21287, USA. ple5@jhmi.edu.

    Papers in Europe PMC
  9. 09
    Sharma P7 papers · 2025

    Genomics and Molecular Medicine, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi 110007, India.

    Papers in Europe PMC
  10. 10
    Kumar M6 papers · 2026

    Genomics and Molecular Medicine, CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007, India.

    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.

See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.

General rare disease registries you may be eligible for

These studies enroll across many rare conditions. They are not counted as evidence that anyone is studying this specific disease.

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 Spinocerebellar ataxia type 12 — check Associations / patient organisations on that page.

India — NPRD

Last verified 2026-07-26

This 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.

("Spinocerebellar ataxia type 12" OR "SCA12") OR (MESH:"Spinocerebellar Ataxia 12") OR ("PPP2R2B" OR "PPP2R2B syndrome" OR "PPP2R2B-related")

Run this search on Europe PMC

MeSH descriptor terms unioned into the query: Spinocerebellar Ataxia 12

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Spinocerebellar ataxia type 12" OR "SCA12" OR "Spinocerebellar Ataxia 12"

Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.

Query health: ok — strategies attempted: phrase, mesh; with hits: phrase, mesh

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 (1722) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity

Ingested 2026-07-27T05:21:35.614Z