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ORPHA:199340

BAG3-related myofibrillar myopathy

low confidenceDisorder

Also known as: MFM6 · Myofibrillar myopathy type 6

Query health: suspect — Only one of 2 strategies returned hits (phrase).

Publications

4,734

Trials

0

Interventional, condition-specific

Researchers

211

Distinct authors in sample

Gene link

BAG3

Strong

Readiness

4/6

Stages with a signal

Clinical definition (Orphanet)

A rare myofibrillar characterized by childhood-/adolescent-onset with proximal and/or distal muscle weakness that commonly progress to involve axial muscles due to BAG3 mutations. Patients present with toe-walking, gait disturbance, fatigue, rigid spine, scoliosis and joint contractures (particularly of the knees, ankles, and hips). Respiratory insufficiency and are frequently present. All patients exhibit a sensorimotor axonal/demyelinating (often with giant axons) peripheral contributing to distal weakness and sensory loss. Disease typically progress rapidly in childhood-/adolescent-onset patient, however few adult-onset patients reported to have milder, slower progression with limited cardiac or respiratory involvement.

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 (5)

BAG3 myofibrillar myopathy (disease) · myofibrillar myopathy (disease) caused by mutation in BAG3 · myofibrillar myopathy 6 · myofibrillar myopathy type 6 · myopathy, myofibrillar, type 6

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 matched interventional trial, but a gene association and an animal model are on record — often described as translation-ready / stalled at the clinical step.

  1. Gene identifiedPresent

    Strong — BAG3

  2. LiteraturePresent

    4,734 matched papers (3,629 in last 10 years) Source

  3. Phenotype characterisedPresent

    32 HPO annotations (e.g. Distal muscle weakness; Lower limb muscle weakness; Diaphragmatic paralysis) Source

  4. Animal modelPresent

    4 genotype models (Danio rerio, Mus musculus) Source

  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 (BAG3).

GenCC classification: Strong.

Phenotypes (Monarch / HPO)

32

Associated phenotypes · MONDO:0013061

  • Distal muscle weakness
  • Lower limb muscle weakness
  • Diaphragmatic paralysis
  • Demyelinating peripheral neuropathy
  • Hyporeflexia

Showing 5 of 32 — open Monarch for the full list.

Animal models (Monarch / Alliance)

4

Model associations linked to this Mondo ID

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?

4,734

4,734 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.

4,734 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).

3,629 in the last 10 years · low confidence

Phrase hits: 32 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

211

Distinct author names in 32 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
    Filippi K6 papers · 2026

    Institute of Physiology I, Medical Faculty, University of Bonn, Bonn, Germany.

    Papers in Europe PMC
  2. 02
    Fleischmann BK6 papers · 2026

    Institute of Physiology I, Medical Faculty, University of Bonn, Bonn, Germany.

    Papers in Europe PMC
  3. 03
    Hesse M6 papers · 2026

    Institute of Physiology I, Medical Faculty, University of Bonn, Bonn, Germany. mhesse1@uni-bonn.de.

    Papers in Europe PMC
  4. 04
    Wiemann M4 papers · 2026

    Institute of Physiology I, Medical Faculty, University of Bonn, Bonn, Germany.

    Papers in Europe PMC
  5. 05
    Riße I3 papers · 2025

    Institute of Physiology I, Medical Faculty, University of Bonn, Germany.

    Papers in Europe PMC
  6. 06
    Bonnet D2 papers · 2026

    M3C-Necker, Congenital and Pediatric Cardiology Department, Necker Enfants malades University Hospital, APHP, Paris, France.

    Papers in Europe PMC
  7. 07
    Conklin BR2 papers · 2025

    Gladstone Institutes, San Francisco, USA; University of California, San Francisco, USA.

    Papers in Europe PMC
  8. 08
    Daire E2 papers · 2026

    Pediatric Cardiology Department, Amiens University Hospital and Laboratory EA4666 Hematim, University of Picardie-Jules Verne, Amiens, France.

    Papers in Europe PMC
  9. 09
    Gardin C2 papers · 2026

    Cardiology Departement, Laval Hospital, Laval, France.

    Papers in Europe PMC
  10. 10
    Gitiaux C2 papers · 2026

    Reference Centre for Neuromuscular Diseases, Necker-Enfants malades Hospital, APHP, Paris, 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).

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 myofibrillar myopathy 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: myofibrillar myopathy

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 BAG3-related myofibrillar myopathy — 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.

("BAG3-related myofibrillar myopathy" OR "Myofibrillar myopathy type 6" OR "BAG3 myofibrillar myopathy (disease)" OR "myofibrillar myopathy (disease) caused by mutation in BAG3" OR "myofibrillar myopathy 6" OR "myopathy, myofibrillar, type 6") OR (MESH:"Myopathy, Myofibrillar, Bag3-Related") OR ("BAG3" OR "BAG3 syndrome" OR "BAG3-related")

Run this search on Europe PMC

MeSH descriptor terms unioned into the query: Myopathy, Myofibrillar, Bag3-Related

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

"BAG3-related myofibrillar myopathy" OR "Myofibrillar myopathy type 6" OR "BAG3 myofibrillar myopathy (disease)" OR "myofibrillar myopathy (disease) caused by mutation in BAG3" OR "myofibrillar myopathy 6" OR "myopathy, myofibrillar, type 6" OR "Myopathy, Myofibrillar, Bag3-Related"

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

Parent-category trials query:

"myofibrillar myopathy"

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

Run this search on ClinicalTrials.gov

Synonyms dropped by stoplist: MFM6

Confidence reasoning

  • Preferred label is multi-word and distinctive
  • 1 synonym(s) dropped by stoplist (may under-count)
  • No label/synonym collisions with other diseases in this corpus
  • Publication count (4734) is implausibly high for prevalence class "<1 / 1 000 000" — treat as possible over-matching, not a measure of research intensity

Ingested 2026-07-27T09:14:01.524Z