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Related Concept Videos

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Myocarditis I: Introduction

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Chronic Inflammation: Introduction

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Inflammatory Bowel Disease I: Introduction01:26

Inflammatory Bowel Disease I: Introduction

Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows “skip lesions” in which...
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Inflammatory Bowel Disease III: Crohn's Disease

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Myasthenia Gravis ll: Pathophysiology

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Related Experiment Video

Updated: Jun 28, 2026

Immunolabelling Myofiber Degeneration in Muscle Biopsies
06:37

Immunolabelling Myofiber Degeneration in Muscle Biopsies

Published on: December 5, 2019

Inflammatory muscle diseases.

F L Mastaglia1

  • 1Centre for Neuromuscular and Neurological Disorders, University of Western Australia, Queen Elizabeth II Medical Centre, Nedlands 6009, Australia. flmast@cyllene.uwa.edu.au

Neurology India
|November 1, 2008
PubMed
Summary
This summary is machine-generated.

Dermatomyositis, polymyositis, and inclusion body myositis are distinct immune-mediated myopathies. Understanding their unique inflammatory and degenerative pathways is crucial for developing effective treatments beyond current empirical therapies.

Related Experiment Videos

Last Updated: Jun 28, 2026

Immunolabelling Myofiber Degeneration in Muscle Biopsies
06:37

Immunolabelling Myofiber Degeneration in Muscle Biopsies

Published on: December 5, 2019

Area of Science:

  • Neurology
  • Immunology
  • Genetics

Background:

  • Immune-mediated inflammatory myopathies (IMIMs) include dermatomyositis (DM), polymyositis (PM), and inclusion body myositis (IBM).
  • These conditions exhibit distinct clinical presentations, pathogenesis, and muscle gene expression patterns.
  • Current understanding of IMIMs highlights diverse immune responses and degenerative processes.

Purpose of the Study:

  • To differentiate the pathogenetic mechanisms of DM, PM, and IBM.
  • To review current treatment strategies and emerging therapies for IMIMs.
  • To identify knowledge gaps in understanding IMIMs, particularly IBM.

Main Methods:

  • Comparative analysis of clinical features, immune responses, and molecular pathology.
  • Review of existing literature on therapeutic interventions.
  • Discussion of unresolved questions regarding disease mechanisms and treatment resistance.

Main Results:

  • DM involves a complement-dependent humoral process targeting endothelial cells, leading to microangiopathy and muscle ischemia.
  • PM and IBM are characterized by T-cell responses, CD8+ lymphocyte invasion, and cytotoxic necrosis.
  • IBM also features degenerative changes, including impaired proteasomal function, autophagia, and protein accumulation.

Conclusions:

  • Distinct mechanisms underlie DM, PM, and IBM, necessitating tailored therapeutic approaches.
  • Conventional treatments (glucocorticoids, immunosuppressants) are often empirical.
  • Emerging therapies show promise but require further randomized trials to establish efficacy and guidelines.