Related Experiment Video
Updated: Jun 23, 2026
10:55
Detection of Anti-MDA5 Autoantibodies Using HeLa Cells and Immunocytochemistry with Light Microscopy
Published on: October 31, 2025
[New autoantibodies in dermatomyositis]
1Servicio de Dermatología, Hospital Universitario Germans Trias i Pujol, Universidad Autónoma de Barcelona, Badalona, Barcelona, España. ibielsa.germanstrias@gencat.cat
Actas Dermo-Sifiliograficas
|May 22, 2009
Summary
Newly identified myositis-specific antibodies, CADM-140 and anti-p155/p140, aid in diagnosing and understanding idiopathic inflammatory myopathies, including clinically amyopathic dermatomyositis (CADM) and cancer-associated dermatomyositis.
Area of Science:
- Immunology
- Rheumatology
- Dermatology
Context:
- Idiopathic inflammatory myopathies (IIMs) are autoimmune diseases affecting muscles and skin.
- Autoantibodies, including myositis-specific antibodies (MSAs), are crucial for IIM classification and prognosis.
- Previous diagnostic challenges existed for clinically amyopathic dermatomyositis (CADM) and cancer-associated dermatomyositis (CIBM).
Purpose:
- To highlight the significance of newly identified myositis-specific antibodies.
- To emphasize their role in diagnosing and understanding specific IIM subgroups.
- To underscore the importance of identifying autoantibody targets for disease pathogenesis research.
Summary:
- Dermatomyositis is an idiopathic inflammatory myopathy impacting skeletal muscle and skin.
- Myositis-specific antibodies (MSAs) are key diagnostic and prognostic markers in IIMs.
- Recent discoveries include CADM-140 for CADM and anti-p155/p140 for cancer-associated dermatomyositis, previously lacking specific MSAs.
Impact:
- Facilitates improved clinical diagnosis and classification of IIMs.
- Enhances understanding of the pathogenesis of dermatomyositis subtypes.
- Enables better patient stratification for targeted therapies and prognosis.
Related Concept Videos
01:29Autoimmune Disorders
Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
Concept and Mechanism of Autoimmune Diseases
The immune system...
01:20Myasthenia Gravis: Overview and Treatment
Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
01:27Myocarditis II: Clinical Features and Diagnostic Tests
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
01:15Myasthenia Gravis: Diagnostic Tests
Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
01:22Myasthenia Gravis ll: Pathophysiology
The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...