MOLECULAR MECHANISMS LINKING METABOLIC DYSREGULATION, HEART DISEASE, AND BRAIN DISORDERS: EMERGING ROLES OF STEM CELL THERAPY AND CLINICAL BIOCHEMISTRY

Abstract

Metabolic dysregulation is increasingly recognized as a major biological factor linking cardiovascular disease and a wide range of neurological disorders through interconnected molecular, cellular, and biochemical mechanisms. Disturbances in glucose and lipid metabolism, insulin signaling, mitochondrial function, oxidative balance, and inflammatory regulation can produce systemic effects that simultaneously impair cardiac and cerebral health. Chronic metabolic abnormalities promote endothelial dysfunction, excessive production of reactive oxygen species, altered lipid accumulation, and persistent low-grade inflammation, creating conditions that contribute to atherosclerosis, myocardial injury, neurovascular damage, and progressive neuronal dysfunction. Insulin resistance and impaired energy metabolism are particularly important because the heart and brain have high and continuous energy requirements. When metabolic homeostasis is disrupted, mitochondrial dysfunction and reduced cellular energy availability may compromise cardiomyocyte survival, synaptic activity, neuronal communication, and tissue repair. Clinical biochemistry provides essential tools for identifying these pathological alterations through the assessment of glucose-related indicators, lipid profiles, inflammatory mediators, cardiac biomarkers, oxidative stress markers, liver and renal parameters, and other molecular indicators associated with disease progression. The integration of biochemical information may therefore support earlier risk identification and a more comprehensive understanding of the metabolic interactions underlying heart and brain disorders. In parallel, stem cell therapy has emerged as a promising regenerative approach because of its potential to promote tissue repair, modulate inflammatory responses, support angiogenesis, and influence damaged cellular environments. Mesenchymal stem cells, induced pluripotent stem cells, and other progenitor cell populations are being investigated for their capacity to improve cardiac repair and provide neuroprotective or regenerative effects in selected neurological conditions. Their therapeutic activity may involve not only direct cellular replacement but also paracrine signaling, extracellular vesicle release, immunomodulation, and the stimulation of endogenous repair mechanisms. However, variations in stem cell sources, delivery methods, long-term survival, immune compatibility, tumorigenic potential, and clinical efficacy remain significant challenges. This study examines the molecular connections among metabolic dysfunction, cardiovascular pathology, and brain disorders while highlighting the complementary roles of stem cell therapy and clinical biochemistry. A better understanding of these interconnected mechanisms may support the development of integrated diagnostic and therapeutic strategies aimed at reducing disease progression, improving tissue recovery, and advancing personalized approaches to cardiometabolic and neurological care