Theall 2021 Physiol Rep
| Theall B, Stampley J, Cho E, Granger J, Johannsen NM, Irving BA, Spielmann G (2021) Impact of acute exercise on peripheral blood mononuclear cells nutrient sensing and mitochondrial oxidative capacity in healthy young adults. Physiol Rep 9:e15147. |
Theall B, Stampley J, Cho E, Granger J, Johannsen NM, Irving BA, Spielmann G (2021) Physiol Rep
Abstract: Regular exercise is associated with changes in peripheral blood mononuclear cell (PBMC) proportions that have enhanced effector functions in young and old adults; however, the effects of acute exercise on PBMC nutrient sensors and metabolic function in active young adults is unknown. To fill this gap, activation status and nutrient-sensing mechanisms of PBMCs isolated from 21 healthy active adults (20-35 yr; 36.5 ยฑ 6.3 VฬO2peak ) were characterized before and after 30 min of moderate-to-vigorous cycling (65%-75% VฬO2peak ). In addition, changes in PBMC mitochondrial respiratory function in response to exercise were assessed using high-resolution respirometry. There was an increase in the number of activated CD69+/CD4 (79% increase) and CD69+/CD8 (166% increase) T-cells in response to the acute bout of exercise, while the nutrient-sensing mechanisms remained unchanged. PBMC mitochondrial respiration did not increase on a cell-per-cell basis, however, mitochondrial oxidative capacity (OXPHOS) increased at the tissue level (18.6 pmol/(s*ml blood) versus 29.3 pmol/(s*ml blood); p < 0.05) in response to acute exercise. Thus, this study shows that acute exercise preferentially mobilizes activated T-cells while concomitantly increasing PBMC mitochondrial oxidative capacity at the tissue level, rather than acutely changing mitochondrial oxidative capacity at the cellular level in young adults.
โข Bioblast editor: Plangger M
Labels: MiParea: Respiration
HRR: Oxygraph-2k
2021-12
