@article{3cdc046b3d62432398bd187b789a40a0,
title = "NRF2 pathway activation by KEAP1 inhibition attenuates the manifestation of aging phenotypes in salivary glands",
abstract = "Saliva plays an essential role in the maintenance of oral health. The oral cavity environment changes during aging mainly due to alterations in the secretion and composition of saliva. In particular, unstimulated basal salivary flow decreases with age. The functional decline of the salivary glands impairs chewing and swallowing abilities and often becomes one of the predispositions for aging-related disorders, including aspiration pneumonia. The KEAP1-NRF2 system plays a central role in the regulation of the oxidative stress response. NRF2 is a transcription factor that coordinately regulates cytoprotective genes, and KEAP1 is a negative regulator of NRF2. Although NRF2 activation has been suggested to be advantageous for the prevention of aging-related diseases, its role in the course of physiological aging is not well understood. To investigate the impact of NRF2 activation on salivary gland aging, we compared the submandibular glands of Keap1-knockdown (KD) (Keap1FA/FA) mice in which NRF2 is activated with those of wild-type mice. Young mice did not show any apparent differences between the two genotypes, whereas in old mice, clear differences were observed. Aged wild-type submandibular glands exhibited iron and collagen depositions, immune cell infiltration and increased DNA damage and apoptosis accompanied by elevated oxidative stress, which were all markedly attenuated in Keap1-KD mice, suggesting that NRF2 activation has antiaging effects on salivary glands. We propose that appropriate activation of NRF2 is effective for the maintenance of healthy salivary gland conditions and for the prevention of hyposalivation in the elderly.",
keywords = "Aging, KEAP1, Mouse, NRF2, Salivary glands",
author = "Wati, {Sisca Meida} and Daisuke Matsumaru and Hozumi Motohashi",
note = "Funding Information: We thank Prof. Masi Yamamoto for providing us Keap1 knockdown mice, Ms. Nao Ota for the support of mouse breeding and the Biomedical Research Cores of the Tohoku University Graduate School of Medicine and Institute of Development, Aging and Cancer for their technical supports. This work was supported by JSPS [grant numbers 19K07361 (DM), 18H02621 (HM) and 18H04794 (HM)], the Naito Foundation (HM), a research grant from the Princess Takamatsu Cancer Research Fund [grant number 15-24728 (HM)], the Uehara Memorial Foundation (HM), AMED [grant number JP19gm5010002 (HM)] and Japan-Sweden Research Cooperative Program between JSPS and STINT [grant number JPJSBP120195402 (HM)]. The funders had no role in the study design, data collection and analysis, decision to publish or manuscript preparation. Funding Information: We thank Prof. Masi Yamamoto for providing us Keap1 knockdown mice, Ms. Nao Ota for the support of mouse breeding and the Biomedical Research Cores of the Tohoku University Graduate School of Medicine and Institute of Development, Aging and Cancer for their technical supports. This work was supported by JSPS [grant numbers 19K07361 (DM), 18H02621 (HM) and 18H04794 (HM)], the Naito Foundation (HM), a research grant from the Princess Takamatsu Cancer Research Fund [grant number 15-24728 (HM)], the Uehara Memorial Foundation (HM), AMED [grant number JP19gm5010002 (HM)] and Japan-Sweden Research Cooperative Program between JSPS and STINT [grant number JPJSBP120195402 (HM)]. The funders had no role in the study design, data collection and analysis, decision to publish or manuscript preparation. Publisher Copyright: {\textcopyright} 2020 The Author(s)",
year = "2020",
month = sep,
doi = "10.1016/j.redox.2020.101603",
language = "English",
volume = "36",
journal = "Redox Biology",
issn = "2213-2317",
publisher = "Elsevier BV",
}