Eccentric exercise causes skeletal muscle damage, yet the acute cellular responses post-exercise have yet to be fully elucidated. To better understand the post-exercise response, heat shock protein (HSP) 72 content and nuclear factor-κB (NF-κB) activation where examined in Adult (A; 6 month) and Late middle-aged (LMA; 24 month) Fischer 344xBrown Norway rats. Animals were randomly divided into five groups (n=6): non-exercising controls (C), level (L) or eccentric (ECC) (-16°) running at 16m.m-1 and killed immediately post-exercise (0), 48 hours post-exercise (48). Following ECC, vastus intermedius (VI) from A and LMA showed more damage compared to L exercise. Neither age-group had significantly increased VI HSP72 content compared to C.
Pooled results founded increased HSP72 content in ECC-48 compared to C (p<0.02). NF-κB activation in the VI was lower in LMA (p<0.001) and unchanged in WG when compared to AC.
These findings suggest HSP72 is increased following eccentric exercise in the VI.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OTU.1807/31306 |
| Date | 14 December 2011 |
| Creators | Lewis, Evan |
| Contributors | Amara, Catherine |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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