[Rheumatoid arthritis].

Area of Science:

• Immunology
• Rheumatology
• Molecular Biology

Background:

• Rheumatoid arthritis (RA) is a chronic, progressive systemic connective tissue disease.
• RA primarily affects joints, causing destructive alterations due to synovial inflammation and immune cell activation.
• Cytokines, chemokines, and growth factors are central to RA's chronic inflammatory processes.

Purpose of the Study:

• To review recent insights into the molecular mechanisms of rheumatoid arthritis.
• To highlight the roles of various immune and local cells in RA pathogenesis.
• To emphasize the need for expanded therapeutic options due to patient heterogeneity.

Main Methods:

• This is an overview, summarizing current scientific literature and recent findings.
• It focuses on cellular and immunological processes in RA.
• It discusses the molecular mechanisms driving inflammation and tissue damage.

Main Results:

• Inflammatory cells (T cells, B cells, neutrophils, macrophages) and local cells (fibroblasts, osteoclasts) are activated in RA.
• These cells release mediators that drive inflammation and destruction of cartilage and bone.
• Patient heterogeneity necessitates new therapeutic strategies beyond general immune suppression.

Conclusions:

• RA involves complex, interwoven cellular and immunological pathways leading to irreversible joint destruction.
• Targeting key molecular mechanisms can reduce or halt inflammatory processes.
• Further research into novel molecular targets is crucial for developing improved RA therapies.