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- W3205438321 abstract "Vascular endothelial function declines with age on average, but there is high variability in the magnitude of this decline within populations. Measurements of frailty, known as frailty index (FI), can be used as surrogates for biological age, but it is unknown if frailty relates to the age-related decline in vascular function. To examine this relation, we studied young (4-9 months) and old (23-32 months) C57BL6 mice of both sexes. We found that FI was greater in old compared with young mice, but did not differ between old male and female mice. Middle cerebral artery (MCA) and mesenteric artery endothelium-dependent dilation (EDD) also did not differ between old male and female mice; however, there were sex differences in the relations between FI and EDD. For the MCA, FI was inversely related to EDD among old female mice, but not old male mice. In contrast, for the mesenteric artery, FI was inversely related to EDD among old male mice, but not old female mice. A higher FI was related to a greater improvement in EDD with the superoxide scavenger 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl in the MCAs for old female mice and in the mesenteric arteries for old male mice. FI related to mesenteric artery gene expression negatively for extracellular superoxide dismutase (Sod3) and positively for interleukin-1β (Il1b). In summary, we found that the relation between frailty and endothelial function is dependent on sex and the artery examined. Arterial oxidative stress and proinflammatory signaling are potential mediators of the relations of frailty and endothelial function." @default.
- W3205438321 created "2021-10-25" @default.
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- W3205438321 date "2021-10-19" @default.
- W3205438321 modified "2023-10-14" @default.
- W3205438321 title "Sex Differences in the Relation Between Frailty and Endothelial Dysfunction in Old Mice" @default.
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- W3205438321 doi "https://doi.org/10.1093/gerona/glab317" @default.
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