Albert Einstein College of Medicine study links zombie cell buildup to aging

Researchers at the Albert Einstein College of Medicine have identified why senescent cells, often called ‘zombie cells,’ accumulate during the aging process. According to a study published in Nature Aging, the buildup is linked to a decline in chaperone-mediated autophagy (CMA), a cellular recycling process that tags damaged proteins for removal by macrophages.

In younger organisms, cells can ramp up CMA activity to manage protein waste. However, in older organisms, CMA activity slows down, leading to a buildup of cellular ‘trash.’ This waste not only damages nearby cells but also interferes with the ability of immune cells to identify and remove the senescent cells. This cycle contributes to chronic inflammation and various age-related conditions, including neurodegenerative disorders, metabolic diseases, and lung fibrosis.

Study leader Ana Maria Cuervo noted that by restoring this cellular recycling process, it may be possible to help the body’s own defenses clear these cells more effectively, offering potential new avenues for treating age-related diseases.