Biology of Sport
pISSN 0860-021X    eISSN 2083-1862
Archival Issues
Volume 33, 2016
Volume 32, 2015
Volume 31, 2014
Volume 30, 2013
Volume 29, 2012
Volume 28, 2011
Volume 27, 2010
Volume 26, 2009
Volume 25, 2008
Volume 24, 2007
Volume 23, 2006
Volume 22, 2005
Volume 21, 2004
Volume 20, 2003
Archival Issues 1984-1998
Search
Newsletter
Information for Authors
Special Information
 » 
Journal Abstract
 
Physiological role of myosin light and heavy chain isoforms in fast- and slow-twitch muscles: effect of exercise
K Alev, P Kaasik, A Pehme, M Aru, AM Parring, A Elart, T Seene
Biol Sport 2009; 26(3):215-234
ICID: 894654
Article type: Original article
IC™ Value: 9.80
Abstract provided by Publisher
 
The aims of the present study were to show the distribution of individual myosin light chain (MyLC) isoforms in fast-twitch (FT) and slow-twitch (ST) muscles and between FT muscles in order to find differences between MyLC isoforms in these muscles, to identify similarities with the distribution of myosin heavy chain (MyHC) isoforms and to investigate changes in these relations during adaptation to endurance and resistance training. Male Wistar strain rats were used in this study. One-dimensional electrophoresis was used for separation of MyHC and MyLC isoforms and two-dimensional electrophoresis was used for identification of MyLC different isoforms. A difference in the relative content of MyLC isoforms between FT muscles exists only in the case of MyLC 1slow and 2slow isoforms. Differences in the relative content of MyHC between FT muscles are considerably larger than differences in the MyLC isoforms. MyHC and MyLC isoforms both participate in the remodelling of contractile proteins during exercise training. In conclusion: The present study shows some discrepancy between the modulation of MyHC and MyLC isoforms in muscles with different oxidative potential during adaptation to endurance and resistance training. In ST muscles, there is full agreement between the increase in the relative content of MyHC IIa isoform and MyLC 2fast and 3fast isoforms during resistance training without significant changes during endurance training. The ratio of MyLC 3 and MyLC 2 isoforms increases during both types of exercise training, but it is two times higher during resistance training.

ICID 894654

DOI 10.5604/20831862.894654
 
FULL TEXT 308 KB


Related articles
  • in IndexCopernicus™
         MyLC [0 related records]
         MyHC [0 related records]
         Aerobic and anaerobic capacity in fast-twitch and slow-twitch muscles [0 related records]


  •  

    Copyright © Biology of Sport  2017
    Page created by Index Copernicus Ltd. All Rights reserved.