Eccentric training impairs NF-kappaB activation and over-expression of inflammation-related genes induced by acute eccentric exercise in the elderly.
The present study was aimed to investigate in elderly humans changes in NF-kappaB activation and in the expression of the inflammation-related genes inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) and interleukin-6 (IL-6) induced in peripheral blood mononuclear cells (PBMC) by acute eccentric exercise and by submaximal eccentric training. Eleven subjects, aged 66-75 years, carried out 2 bouts of eccentric exercise separated by 8 weeks of training. Following the first bout, NF-kappaB activation, and protein level of p50/p65 subunits, phospho-IkappaBalpha and phospho-IKKalpha increased, while IkappaBalpha protein level was significantly reduced. This was accompanied by a significant increase in iNOS, COX-2 and IL-6 mRNA protein level and protein content. Changes were significantly attenuated following the second exercise bout. In conclusion, acute eccentric exercise increases NF-kappaB activation and the expression of several inflammation-related genes in PBMC from elderly individuals. Regular eccentric training might be an effective method of preventing undesirable inflammatory responses induced by eccentric exercise.
Jiménez-Jiménez
Rodrigo
R
Institute of Biomedicine, University of León, León, Spain.
Cuevas
María José
MJ
Almar
Mar
M
Lima
Elena
E
García-López
David
D
De Paz
José A
JA
González-Gallego
Javier
J
D000368:Aged; D000375:Aging; D051546:Cyclooxygenase 2 / Q000096:biosynthesis; D015444:Exercise; D005260:Female; D005786:Gene Expression Regulation; D006801:Humans; D007249:Inflammation; D015850:Interleukin-6 / Q000378:metabolism; D007963:Leukocytes, Mononuclear / Q000378:metabolism; D008297:Male; D009132:Muscles / Q000473:pathology; D016328:NF-kappa B / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism; D013997:Time Factors
D015850:Interleukin-6; D016328:NF-kappa B; D012333:RNA, Messenger; D051546:Cyclooxygenase 2