Immune checkpoint failures in inflammatory myopathies: An overview

Area of Science:

• Immunology
• Rheumatology
• Neurology

Background:

• Inflammatory myopathies (IM) encompass dermatomyositis (DM), polymyositis (PM), inclusion body myositis (IBM), and immune-mediated necrotizing myopathy (IMNM).
• These conditions are characterized by autoimmune features, including autoreactive lymphocytes and autoantibodies, stemming from a loss of self-tolerance.
• Autoimmunity arises when the immune system attacks self-antigens due to failures in immune checkpoints.

Purpose of the Study:

• To review the role of immune checkpoint failures in the pathogenesis of DM, PM, IBM, and IMNM.
• To highlight potential research avenues by examining contributions to each immune checkpoint.
• To provide a comprehensive understanding of IM disease pathology.

Main Methods:

• Literature review focusing on immune checkpoints in inflammatory myopathies.
• Analysis of research contributions related to specific immune checkpoints in DM, PM, IBM, and IMNM.
• Synthesis of current knowledge on autoimmunity and immune checkpoint dysfunction in IM.

Main Results:

• Specific immune checkpoint failures are implicated in the development and progression of DM, PM, IBM, and IMNM.
• Dysregulation of immune checkpoints contributes to the loss of self-tolerance observed in these autoimmune myopathies.
• Research into these checkpoints reveals distinct patterns across different IM subtypes.

Conclusions:

• Understanding immune checkpoint failures is crucial for elucidating the complex pathology of inflammatory myopathies.
• Targeting specific immune checkpoints may offer novel therapeutic strategies for IM.
• Further research into immune checkpoint mechanisms can advance the diagnosis and treatment of autoimmune myopathies.