Research Article
Phenotypic Outcomes of Adrenal Morphology and Hormonal Regulation: An Integrative Analysis
Ronaldo Freua Bufaíçal Filho, Carlos Henrique Marchiori, Klebert de Paula Malheiros
Middle East Research Journal of Medical Sciences; 195-208.
https://doi.org/10.36348/merjms.2026.v06i03.003
The adrenal glands are essential endocrine organs responsible for maintaining metabolic balance, cardiovascular stability, immune modulation, and behavioral adaptation. Alterations in their morphology or hormone production can generate distinct clinical and phenotypic patterns that are often underrecognized in diagnostic practice. This study aimed to integrate anatomical, physiological, and phenotypic information to better characterize how adrenal function contributes to observable human variability. A descriptive and integrative methodology was adopted, incorporating classical anatomical references, physiologic models of hormone secretion, and phenotype-based analyses associated with cortisol, aldosterone, adrenal androgens, and catecholamines. The results highlight that adrenal hyperfunction produces well-defined metabolic and cardiovascular outcomes, including central adiposity, glucose imbalance, hypertension, and androgen-related changes. Conversely, adrenal hypofunction leads to a low-energy phenotype characterized by fatigue, weight loss, electrolyte disturbances, and impaired stress tolerance. Additional findings show that genetic, environmental, and developmental factors modulate adrenal expression throughout life, shaping individual differences in stress responses and disease susceptibility. In conclusion, adrenal morphology and physiology interact dynamically to produce diverse phenotypic outcomes, and recognizing these integrated patterns enhances diagnostic accuracy and supports more individualized therapeutic strategies in clinical endocrinology.
Research Article
Mitochondrial Dysfunction as a Central Driver of Neurodegenerative Disease Pathogenesis
Marco Vinícios de Oliveira Santana, Carlos Henrique Marchiori, Klebert de Paula Malheiros, Érico Meirelles de Melo
Middle East Research Journal of Medical Sciences; 209-222.
https://doi.org/10.36348/merjms.2026.v06i03.004
Mitochondria play a fundamental role in neuronal survival by regulating cellular bioenergetics, calcium homeostasis, and redox balance. In neurodegenerative diseases, mitochondrial dysfunction emerges as a critical early event contributing to progressive neuronal damage. Impairment of the electron transport chain leads to reduced ATP production and excessive generation of reactive oxygen species, promoting mitochondrial DNA damage and disruption of mitochondrial membrane potential. These alterations impair mitochondrial quality control mechanisms, including PINK1/Parkin-mediated mitophagy, and disturb the dynamic balance between mitochondrial fission and fusion processes. Consequently, dysfunctional mitochondria accumulate, exacerbating proteostasis impairment, synaptic dysfunction, and inflammatory responses within the neuronal microenvironment. In addition, metabolic disturbances such as cholesterol accumulation further aggravate mitochondrial stress, amplifying oxidative damage and activating neuroinflammatory pathways mediated by glial cells. The persistent interplay between mitochondrial dysfunction, oxidative stress, and inflammation ultimately contributes to neuronal degeneration and disease progression. Understanding the mechanistic links between mitochondrial homeostasis failure and neurodegenerative processes may provide valuable insights into disease pathogenesis and identify potential therapeutic targets aimed at restoring mitochondrial function and neuronal resilience.
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