Recent academic reviews indicate that biological aging is a complex, multi-stage process involving diverse cellular responses and the accumulation of latent physiological damage.

近期的學術回顧指出，生物衰老是一個複雜的多階段過程，涉及多樣的細胞反應以及潛在生理損傷的累積。

The conceptualization of cellular senescence has undergone a significant transition. While senescent cells—characterized by the permanent cessation of mitotic division—were previously categorized as uniformly pathogenic drivers of inflammation, current evidence suggests a functional dichotomy. Research led by Sichuan University posits that these cells exhibit phenotypic heterogeneity; certain populations facilitate wound healing and tissue homeostasis, whereas others catalyze metabolic dysfunction and oncogenesis. Consequently, the therapeutic paradigm is shifting from indiscriminate senolysis toward 'precision geroprotection.' This approach seeks to utilize single-cell omics and CAR-T immunotherapies to selectively eliminate maladaptive cells while preserving those essential for structural integrity.

對於細胞衰老的概念化已經經歷了顯著的轉變。雖然衰老細胞（其特徵是永久停止有絲分裂）先前被歸類為統一的發炎致病驅動因素，但目前的證據顯示其具有功能上的二分性。由四川大學領導的研究認為，這些細胞表現出表型異質性；某些細胞群有助於傷口癒合與組織恆定，而其他細胞則會催化代謝功能障礙與腫瘤發生。因此，治療範式正從不分對象的衰老細胞清除術轉向「精準衰老保護」。此方法旨在利用單細胞組學與 CAR-T 免疫療法，選擇性地消除適應不良的細胞，同時保留對結構完整性至關重要的細胞。

Parallel to this cellular analysis, a theoretical framework proposed by researchers from University College London and Queen Mary University of London delineates aging as a two-stage multifactorial disorder. The initial phase involves the acquisition of latent damage—via genetic mutation, infection, or physical trauma—which remains sequestered by systemic repair mechanisms. The second phase is characterized by a decline in genetic regulatory efficiency, which facilitates the manifestation of these dormant pathologies. This model explains the delayed onset of conditions such as shingles or osteoarthritis, suggesting that late-life morbidity is often the result of a failure to contain early-life disruptions. This evolutionary perspective suggests that the attenuation of natural selection in post-reproductive stages permits the emergence of these deleterious biological processes.

與此細胞分析平行，由倫敦大學學院（UCL）與倫敦瑪麗女王大學研究人員提出的一個理論框架，將衰老描述為一種兩階段的多因素疾病。第一階段涉及潛在損傷的獲取——透過基因突變、感染或物理創傷——而這些損傷被系統性修復機制所隔離。第二階段的特徵是基因調節效率下降，進而促使這些潛伏病理的顯現。此模型解釋了如帶狀疱疹或骨關節炎等疾病的延遲發作，表明晚年發病通常是未能控制早年破壞的結果。這種演化視角認為，在生殖後階段，自然選擇的削弱使得這些有害生物過程得以出現。

Current research emphasizes a transition toward personalized, precision-based interventions that account for both the diversity of senescent cells and the cumulative impact of early-life physiological damage.

目前的研究強調轉向個性化、基於精準的干預措施，以兼顧衰老細胞的多樣性以及早年生理損傷的累積影響。