ArticleThe Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology2025
Age-related changes in diurnal expression of inflammatory mediators in the brain and peripheral blood of male and female mice.
Article in The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Several molecules in human body exhibit light-dependent diurnal expression rhythms, and their disruption impairs physiological functions and health. Normal aging alters these rhythms, contributing to aging processes and age-related brain disorders. Chronic low-grade inflammation is a hallmark of aging (inflammaging), and age-related changes in the diurnal expression of proinflammatory cytokines have been reported in the suprachiasmatic nucleus (SCN) and peripheral blood. However, it remains unclear which genes show diurnal expression changes in brain with the SCN regions removed (extra-SCN) and whether these changes are reflected in peripheral blood. To address this, we analyzed the diurnal expression of genes in extra-SCN brain regions and cytokines in the peripheral blood of young and aged male and female mice. Samples were collected during the light (10 AM) and the dark (10 PM) phases and analyzed using RNA sequencing and cytokine array analysis. In the aged brain, the number of genes displaying diurnal variation in expression was reduced, whereas genes related to inflammation and immune responses, especially
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