HUNTINGTON, W.Va. — Researchers at the Marshall University Joan C. Edwards School of Medicine have identified new evidence suggesting that tiny particles produced in the gut may help drive inflammation and chronic disease associated with aging. These findings offer new insight into how sleep, metabolism and immune health may be interconnected.
The study, published in April 2026 in Aging Cell , examined gut luminal exosomes—microscopic particles that allow cells to communicate by transporting proteins and genetic material throughout the body. Researchers found that exosomes from older animals carried molecular signals associated with insulin resistance, inflammation and disruption of the gut barrier, and transferring these to young animals elicited similar effects. The converse was also true, namely the transfer of gut luminal exosomes from young animals to older animals mitigated the metabolic aging findings. These results reflect the potential contribution of the gut ecosystem to the development of age-related disease.
The findings suggest that these exosome particles may play a direct role in the development of disease. When the gut barrier becomes weakened, inflammatory substances can leak into the bloodstream, potentially contributing to chronic inflammation and increasing the risk of heart and metabolic diseases.
"This study helps clarify how the physiological stressors associated with biological aging may accelerate biological processes linked to aging and disease," said Abdelnaby Khalyfa, M.Sc., Ph.D., professor of biomedical sciences at the Joan C. Edwards School of Medicine and lead author on the study. "Understanding these mechanisms is essential to identifying new targets for intervention and improving long-term outcomes for patients."
Further, the research supports the idea that aging affects many body systems at once, including metabolism, immune function and cellular signaling. The study also identified specific molecules within these exosomes that could help researchers better understand, detect and eventually treat age-related diseases. The findings are relevant to chronic conditions characterized by sustained physiological stress, including many chronic diseases whose mechanistic processes and pathways may intersect with aging-related pathways.
The study was conducted by a team of investigators, including Khalyfa, Trupti Joshi, Ph.D., and David Gozal, M.D., M.B.A., Ph.D. (Hon) from Marshall University and Lyu Zhen of the University of Missouri. This study was supported by unrestricted start-up funds awarded to Khalyfa by the Joan C. Edwards School of Medicine through the Marshall University Research Corporation (MURC), Huntington, West Virginia, USA. Gozal is supported in part by NIH grants HL166617 and HL169266. This research was also supported in part by the National Institute of General Medical Sciences of the National Institutes of Health under Award Number P20GM103434, through the West Virginia IDeA Network of Biomedical Research Excellence (WV-INBRE).
The full study may be found at https://doi.org/10.1111/acel.70455 .
