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Plasma proteome profiling of 37 individual samples both before and after exercise

ABSTRACT: Regular voluntary exercise has been shown to increase waste transport through the glymphatic system in mice. Here, we investigated the impact of physical exercise on both upstream and downstream brain waste clearance in healthy volunteers via noninvasive MR imaging. Glymphatic influx, evaluated using intravenous contrast-enhanced dynamic T1 mapping, increased significantly at the putamen after 12 weeks of chronic exercise using a cycle ergometer (P=.01). The meningeal lymphatic vessel size and flow, measured by intravenous contrast-enhanced black-blood imaging and IR-ALADDIN technique, increased significantly after chronic exercise (P=.008 and P=.002, respectively). Plasma proteomics revealed significant changes in inflammation-related and immune-related proteins (down-regulated: S100A8, S100A9, PSMA3, and DEFA1A3; up-regulated: J chain) after chronic exercise, which correlated with glymphatic influx or mLV flow (P<.05). Our results suggest that increased glymphatic and mLV flow may be the potential mechanism underlying the neuroprotective effects of exercise on cognition, highlighting the importance of long-term, regular exercise.

INSTRUMENT(S): Q Exactive Plus

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Blood Plasma

SUBMITTER: Dohyun Han

LAB HEAD: Dohyun Han

PROVIDER: PXD058255 | Pride | 2025-04-07

REPOSITORIES: Pride

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			Action	DRS
	20230819_223637_230628_image_DIA.sne	Other
	20230821_170409_230628_image_DIA_Report.params	Other
	20230821_170409_230628_image_DIA_Report.xls	Xls
	230628_image_DIA_1-2.raw	Raw
	230628_image_DIA_10-2.raw	Raw

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Project description:Exercise has multi-systemic benefits and attenuates the physiological impairments associated with aging. Emerging evidence suggests that circulating exosomes mediate some of the beneficial effects of exercise via the transfer of microRNAs between tissues. However, the impact of regular exercise and acute exercise on circulating exosomal microRNAs (exomiRs) in older populations remains unknown. In the present study, we analyzed circulating exomiR expression in endurance-trained elderly men and age-matched sedentary males at baseline (Pre), immediately after a forty minute bout of aerobic exercise on a cycle ergometer (Post), and three hours after this acute exercise (3hPost). Plasma exosomes were isolated, characterized, and exomiR levels were determined by sequencing. The effect of regular exercise on circulating exomiRs was assessed using paired t-tests of baseline expression levels in the trained and sedentary groups. The effect of acute exercise was determined by comparing baseline and post-training expression levels in each group. Regular exercise resulted in significantly increased baseline expression of three exomiRs (miR-486-5p, miR-215-5p, miR-941) and decreased expression of one exomiR (miR-151b). Acute exercise altered circulating exomiR expression in both groups. However, exomiRs regulated by acute exercise in the trained group (7 miRNAs at Post and 8 at 3hPost) were distinct from those in the sedentary group (9 at Post and 4 at 3hPost). Pathway analysis prediction and reported target validation experiments revealed that the majority of exercise-regulated exomiRs are targeting genes that are related to IGF-1 signaling, a pathway involved in exercise-induced muscle and cardiac hypertrophy. The immediately post-acute exercise exomiR signature in the trained group correlates with activation of IGF-1 signaling, whereas in the sedentary group it is associated with inhibition of IGF-1 signaling. These results suggest that training status may counteract age-related anabolic resistance by modulating circulating exomiR profiles both at baseline and in response to acute exercise.

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Plasma proteome profiling of 37 individual samples both before and after exercise

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