Autophagy pathways in autoimmune diseases.

Area of Science:

• Cellular Biology
• Immunology
• Molecular Medicine

Background:

• Autophagy is a fundamental cellular process involved in energy homeostasis, organelle quality control, and proteostasis.
• Autophagy plays critical roles in immune functions, including pathogen defense, cytokine secretion, and antigen presentation.
• While canonical autophagy supports immune tolerance, deregulated autophagy is increasingly implicated in the development and progression of autoimmune diseases.

Purpose of the Study:

• To review recent insights into the intersection of autophagy pathways and autoimmune diseases.
• To focus on the roles of autophagy in multiple sclerosis (MS), systemic lupus erythematosus (SLE), and rheumatoid arthritis (RA).
• To explore how distinct autophagy pathways and protein functions influence the evolution and progression of these autoimmune conditions.

Main Methods:

• Review of current scientific literature on autophagy and autoimmune diseases.
• Analysis of molecular mechanisms linking autophagy to immune responses in MS, SLE, and RA.
• Examination of therapeutic strategies targeting autophagy in autoimmune disease treatment.

Main Results:

• Non-canonical autophagy, such as LC3-associated phagocytosis, can enhance autoantigen presentation in MS models, promoting autoreactive T cell responses.
• Excessive autophagy in plasmacytoid dendritic cells is linked to increased type 1 interferon production in SLE.
• Autophagy proteins are involved in the pathological citrullination of autoantigens in RA.

Conclusions:

• Autophagy pathways are critically involved in the pathogenesis of major autoimmune diseases.
• Understanding the specific roles of different autophagy pathways and proteins is crucial for developing targeted therapies.
• Modulating autophagy functions presents a promising therapeutic strategy for managing autoimmune diseases like MS, SLE, and RA.