Age-related Changes in the Adrenal Cortex: Insights and Implications

Area of Science:

• Endocrinology
• Gerontology
• Oncology

Background:

• Aging leads to physiological decline, impacting all organs, including the adrenal cortex.
• The adrenal cortex produces vital steroid hormones: mineralocorticoids, glucocorticoids, and androgens.
• Age-related adrenal changes include reduced size, altered structure, and immune cell infiltration, more pronounced in males.

Purpose of the Study:

• To review the structural and functional changes in the adrenal cortex during aging.
• To discuss the hormonal alterations associated with adrenal aging.
• To explore the increased incidence of adrenal tumors in aging and potential therapeutic strategies.

Main Methods:

• Literature review of aging, adrenal cortex function, and tumorigenesis.
• Analysis of hormonal changes, including androgens, aldosterone, and cortisol.
• Examination of sex-dimorphic differences in adrenal aging and tumor prevalence.

Main Results:

• Aging significantly reduces adrenal cortex size and alters its zonation and immune cell composition.
• A notable decrease in adrenal androgens occurs with aging, with minor changes in cortisol and aldosterone.
• Adrenal tumors show increased incidence with age, particularly in females, linked to genetic mutations and microenvironment remodeling.

Conclusions:

• Adrenal aging involves structural, functional, and hormonal changes, contributing to pathologies like impaired immunity and bone health.
• The sex dimorphism in adrenal aging and tumorigenesis highlights the need for sex-specific research.
• Developing anti-aging interventions could mitigate adrenal aging and associated diseases, including adrenal tumors.