Tag Archives: mTOR

Protein intake and loss of proteostasis in the eldery

A. N. Kirana1, E. Prafiantini1, N. S. Hardiany2,3*

1Department of Nutrition, Faculty of Medicine, Universitas Indonesia – Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia;
2Department of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia;
3Center of Hypoxia and Oxidative Stress Studies, Faculty of Medicine, Universitas Indonesia;
*e-mail: novi.silvia@ui.ac.id

Received: 29 June 2020; Accepted: 17 December 2020

Ageing is a process of declining bodily function and a major risk factor of chronic diseases. The declining bodily function in ageing can cause loss of proteostasis (protein homeostasis), which is a balance between protein synthesis, folding, modification and degradation. For the elderly, adequate protein intake is necessary to prevent sarcopenia, frailty, fracture and osteoporosis as well as reduced resistance to infection. However, increasing the protein intake can enhance the risk of oxidized protein formation, loss of proteostasis and degenerative disorder occurrence. On the other hand, several studies show that protein restriction would increase longevity. The aim of this review was to explain the importance of determining the right amount and composition of protein intake for the elderly. Oxidative stress and molecular mechanism of proteostasis loss in ageing cells as well as its suppression pathway by protein restriction are discussed in this review.