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Protect against aging and age-related disease with the MondoA protein

Activation of a protein called MondoA can protect against age-related diseases and cellular changes associated with aging

Date:
March 7, 2022
Source:
Osaka University
Summary:
Researchers have shown that a protein called MondoA can activate the important health-linked process of autophagy, whereby cells are broken down and their components are recycled. MondoA both inhibited a protein called Rubicon and regulated the Prdx3 protein, which maintains the stability of energy-producing mitochondria within cells. Activation of MondoA protected against aging and age-associated kidney injury, indicating its potential as a target for the treatment of aging and age-related diseases.
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A step toward discovering the fountain of youth could involve protecting against the inevitable accumulation of "senescent" cells associated with aging and age-related diseases. Now, researchers from Japan have identified the Mondo A protein as key to protecting against the accumulation of senescent cells.

In a study published this month in Cell Reports, researchers led by Osaka University have shown that MondoA delays cellular senescence, and therefore promotes longevity, by activating autophagy. Autophagy is a process whereby cells undergo controlled breakdown and recycling of their components, which is important for maintaining stable conditions in the cellular environment and for enabling adaptation to stress. Activation of autophagy by MondoA partly involves suppressing a protein called Rubicon, which is a negative regulator of autophagy. Rubicon can increase with aging in various tissues and model organisms, which can cause the decline in autophagy seen with aging.

Furthermore, MondoA is also essential to maintaining stable conditions of parts of the cell called mitochondria, which are responsible for energy production. MondoA does this by regulating another molecule, Prdx3, which is involved in mitochondrial turnover. Mitochondria are constantly fusing and dividing, which is important for maintaining their health. Prdx3 is part of the process by which autophagy occurs in mitochondria, preventing senescence. The research team led by Osaka University concluded that MondoA plays a key role in the regulation of Prdx3 and therefore in maintaining mitochondrial stability.

Particularly dense accumulation of senescent cells has been observed in the kidney. The researchers therefore looked at ischemic acute kidney injury (AKI) in mice. "Mice with ischemic AKI and reduced levels of MondoA showed increased senescence," explains lead author Hitomi Yamamoto-Imoto. "We also found that decreased MondoA in the nucleus correlated with human aging and ischemic AKI. MondoA therefore counteracts cellular senescence in aging and ischemic AKI in both mice and humans."

Drugs that eliminate senescent cells, called senolytics, are currently being considered as treatment for age-associated diseases. However, senescent cells play important roles, and their complete removal may have considerable side effects. "Our work shows that the transcriptional activation of MondoA can protect against cellular senescence, kidney injury associated with aging, and organismal aging," explains senior author Tamotsu Yoshimori. "Activation of MondoA and therefore autophagy could be a potentially safe therapeutic strategy." This work could well open new and safer avenues for the treatment of aging and age-related diseases.


Story Source:

Materials provided by Osaka University. Note: Content may be edited for style and length.


Journal Reference:

  1. Hitomi Yamamoto-Imoto, Satoshi Minami, Tatsuya Shioda, Yurina Yamashita, Shinsuke Sakai, Shihomi Maeda, Takeshi Yamamoto, Shinya Oki, Mizuki Takashima, Tadashi Yamamuro, Kyosuke Yanagawa, Ryuya Edahiro, Miki Iwatani, Mizue So, Ayaka Tokumura, Toyofumi Abe, Ryoichi Imamura, Norio Nonomura, Yukinori Okada, Donald E. Ayer, Hidesato Ogawa, Eiji Hara, Yoshitsugu Takabatake, Yoshitaka Isaka, Shuhei Nakamura, Tamotsu Yoshimori. Age-associated decline of MondoA drives cellular senescence through impaired autophagy and mitochondrial homeostasis. Cell Reports, 2022; 38 (9): 110444 DOI: 10.1016/j.celrep.2022.110444

Cite This Page:

Osaka University. "Protect against aging and age-related disease with the MondoA protein." ScienceDaily. ScienceDaily, 7 March 2022. <www.sciencedaily.com/releases/2022/03/220307113136.htm>.
Osaka University. (2022, March 7). Protect against aging and age-related disease with the MondoA protein. ScienceDaily. Retrieved April 21, 2024 from www.sciencedaily.com/releases/2022/03/220307113136.htm
Osaka University. "Protect against aging and age-related disease with the MondoA protein." ScienceDaily. www.sciencedaily.com/releases/2022/03/220307113136.htm (accessed April 21, 2024).

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