Chronic Inflammation as a Central Mechanism in the Pathogenesis of Major Diseases: Current Insights and Future Directions

Background: Chronic inflammation contributes to the development and progression of a wide spectrum of diseases including cardiovascular disease, metabolic disorders, autoimmune conditions, cancer, and neurodegenerative pathologies. A comprehensive understanding of molecular mechanisms, shared biomarkers, and therapeutic targets is crucial for advancing clinical practice and prevention strategies. Methods: We conducted a narrative review of peer-reviewed English-language literature published up to 2025, focusing on chronic inflammation’s role in disease pathophysiology, overlapping biomarkers, mechanistic pathways, lifestyle and environmental modulators, and evolving therapeutic strategies. Key sources were identified through PubMed, PMC, and related biomedical repositories. Results: Chronic inflammation is characterized by persistent immune activation and dysregulated resolution processes, driven by molecular mediators such as TNF-α, IL-6, and CRP across multiple diseases. Shared mechanistic pathways include activation of NF-κB and inflammasome platforms, metabolic reprogramming of immune cells, and altered cytokine profiles. Lifestyle factors (e.g., diet, physical inactivity, smoking) and environmental exposures contribute to systemic chronic inflammatory states. Novel therapeutic strategies targeting pro-inflammatory mediators, precision modulation of immune signaling, and enhancement of resolution pathways are emerging as promising avenues. Conclusion: Chronic inflammation acts as a unifying pathophysiologic thread across diverse disease entities. Recognition of shared and tissue-specific mechanisms supports the development of multidisciplinary interventions and precision medicine approaches. Continued research into pro-resolving mediators and immunometabolic regulation is required to translate mechanistic insights into improved clinical outcomes.