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ORPHA:476394

PMP2-related Charcot-Marie-Tooth disease type 1

low confidenceDisorder

Also known as: PMP2-related CMT1 · PMP2-related Charcot-Marie-Tooth neuropathy type 1 · PMP2-related hereditary motor and sensory neuropathy type 1

Publications

803

Trials

0

Interventional, condition-specific

Researchers

322

Distinct authors in sample

Gene link

PMP2

Strong

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

A rare demyelinating motor and sensory characterized by distal muscle weakness and atrophy, distal sensory impairment, and decreased or absent reflexes in the affected limbs, with an onset in the first or second decade of life. Median motor nerve conduction velocities are typically less than 38 m/s. Patients often have foot deformities. Sural nerve biopsy shows decrease in myelinated fibers, myelin abnormalities, and onion bulb formation. Fatty replacement of muscle tissue predominantly affects the anterior and lateral compartment of the lower legs.

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 (2)

CMT1G · Charcot-Marie-Tooth disease, demyelinating, type 1G

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.”

4/6 stages with a signal

No specific-condition interventional trial, but broader-category trials exist — discuss eligibility with a clinician.

  1. Gene identifiedPresent

    Strong — PMP2

  2. LiteraturePresent

    803 matched papers (548 in last 10 years) Source

  3. Phenotype characterisedPresent

    19 HPO annotations (e.g. Hand tremor; Pes cavus; Babinski sign) 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 trialPartial

    None under the specific name; 42 for broader category Charcot-Marie-Tooth disease

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 (PMP2).

GenCC classification: Strong.

Phenotypes (Monarch / HPO)

19

Associated phenotypes · MONDO:0033135

  • Hand tremor
  • Pes cavus
  • Babinski sign
  • Distal amyotrophy
  • Onion bulb formation

Showing 5 of 19 — 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?

803

803 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.

803 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).

548 in the last 10 years · low confidence

Phrase hits: 41 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

322

Distinct author names in 41 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
    Dou D3 papers · 2021

    Department of Integrative Oncology, China-Japan Friendship Hospital; Beijing University of Chinese Medicine, Beijing 100029, China.

    Papers in Europe PMC
  2. 02
    Jahn O2 papers · 2022

    Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany.

    Papers in Europe PMC
  3. 03
    Li YL2 papers · 2021

    Department of Integrative Oncology, China-Japan Friendship Hospital; Beijing University of Chinese Medicine, Beijing 100029, China.

    Papers in Europe PMC
  4. 04
    Luo J2 papers · 2020

    Department of Pathology, China-Japan Friendship Hospital, Beijing 100029, China.

    Papers in Europe PMC
  5. 05
    Nave KA2 papers · 2024

    Department of Neurogenetics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.

    Papers in Europe PMC
  6. 06
    Schneider RJ2 papers · 2021

    Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA; Perlmutter Cancer Center, New York University School of Medicine, New York, NY 10016, USA. Electronic address: robert.schneider@nyumc.org.

    Papers in Europe PMC
  7. 07
    Siems SB2 papers · 2022

    Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany.

    Papers in Europe PMC
  8. 08
    Tan HY2 papers · 2021

    Department of Integrative Oncology, China-Japan Friendship Hospital, Beijing 100029, China. tanhuangying@263.net.

    Papers in Europe PMC
  9. 09
    Wang C2 papers · 2021

    China-Japan Friendship Hospital, Beijing, China.

    Papers in Europe PMC
  10. 10
    Wang J2 papers · 2020

    INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Hôpital Saint Eloi - Bâtiment INM, 80, rue Augustin Fliche - BP 74103, 34091 Montpellier, France.

    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). 42 trials are registered for Charcot-Marie-Tooth disease, the broader category — shown separately because they may or may not enrol this specific subtype.

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.

42 interventional trials matched Charcot-Marie-Tooth disease, the broader category — listed below. Those studies are not counted in the condition-specific total.

Broader category: Charcot-Marie-Tooth disease

42

Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.

Worth raising with a clinician. How we count trials.

Recruiting under the broader category

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 PMP2-related Charcot-Marie-Tooth disease type 1 — 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.

("PMP2-related Charcot-Marie-Tooth disease type 1" OR "PMP2-related CMT1" OR "PMP2-related Charcot-Marie-Tooth neuropathy type 1" OR "PMP2-related hereditary motor and sensory neuropathy type 1" OR "CMT1G" OR "Charcot-Marie-Tooth disease, demyelinating, type 1G") OR ("PMP2" OR "PMP2 syndrome" OR "PMP2-related")

Run this search on Europe PMC

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

"PMP2-related Charcot-Marie-Tooth disease type 1" OR "PMP2-related CMT1" OR "PMP2-related Charcot-Marie-Tooth neuropathy type 1" OR "PMP2-related hereditary motor and sensory neuropathy type 1" OR "CMT1G" OR "Charcot-Marie-Tooth disease, demyelinating, type 1G"

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

Parent-category trials query:

"Charcot-Marie-Tooth disease"

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

Ingested 2026-07-27T17:07:09.886Z