[Morphology, pathogenesis and classification of interstitial lung diseases]

Area of Science:

• Pulmonology
• Immunology
• Pathology

Context:

• Interstitial lung diseases (ILD) represent a group of chronic inflammatory lung conditions.
• Morphological examination of patient biopsies and animal models provides insight into ILD.
• The pathogenesis involves complex interactions between immunocompetent and inflammatory cells within the alveolar septa.

Purpose:

• To present current literature and original research on the morphology and pathogenesis of interstitial lung diseases.
• To elucidate the role of immune dysregulation, particularly cell immunity, in ILD development.
• To explore the significance of intercellular communication and immune complexes in ILD.

Summary:

• Morphological studies reveal ILD as a chronic inflammatory process characterized by alveolar septa inflammation and fibrosis.
• Disturbances in immune homeostasis, especially cell-mediated immunity, are crucial in ILD pathogenesis.
• Specific forms of ILD, like cryptogenic fibrosing alveolitis, involve "neutrophilic alveolitis" driven by immune complexes.

Impact:

• This research deepens the understanding of ILD morphology, linking it to immune inflammation observed in other organs.
• Identifies key cellular and molecular mechanisms contributing to ILD, potentially guiding future therapeutic strategies.
• Experimental models demonstrate the reproducibility of ILD through antigen administration, aiding further research.