Mid-life: a critical window for intervention during aging

Abstract

Mid-life represents a pivotal period marked by profound physiological and metabolic transitions, increasing susceptibility to chronic diseases. This review explores the molecular and systemic underpinnings of mid-life transition by integrating insights from recent studies that elucidate aging-associated changes in the plasma proteome, immune system, adipose tissue remodeling, and cellular senescence. Nonlinear waves of proteomic alterations have been identified as critical mid-life transitions in inflammatory and hormonal pathways. In addition, sex-specific immune aging trajectories have linked adaptive immunity decline and innate immune activation to metabolic vulnerabilities in mid-life. Moreover, adipose tissue’s central role has been established in mid-life transitions as its early remodeling and inflammatory cytokine secretion drive the systemic aging and metabolic stress. Furthermore, Glb1-2A-mCherry reporter has been introduced to monitor systemic aging, identifying mid-life as a crucial phase for cardiac hypertrophy and senescence-induced inflammation. Collectively, these findings have established our understanding of mid-life transitions, underscoring the interplay between aging processes and metabolic health, with mid-life emerging as a critical window for intervention. This review also underscores biomarkers and therapeutic strategies to alleviate the metabolic challenges of mid-life, thereby promoting healthy aging.