spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online November 2, 2007
Journal of Experimental Biology 210, 4016-4023 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.007708
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Magnoni, L.
Right arrow Articles by Weber, J.-M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Magnoni, L.
Right arrow Articles by Weber, J.-M.

Endurance swimming activates trout lipoprotein lipase: plasma lipids as a fuel for muscle

Leonardo Magnoni and Jean-Michel Weber*

Biology Department, University of Ottawa, 30 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada


Figure 1
View larger version (4K):
[in this window]
[in a new window]

  		Fig. 1. Effect of endurance swimming (4 days at 1.5 BL s–1) on lipoprotein lipase activity (LPL) in red muscle of rainbow trout. Values are mean ± s.e.m. (N=8). Letter a denotes a significant difference from the resting control (P<0.01).

 

Figure 2
View larger version (13K):
[in this window]
[in a new window]

  		Fig. 2. Concentrations of fatty acids (FA) (A), proteins (B) and FA to protein ratio (C) in the plasma lipoproteins of rainbow trout after 4 days of resting or 4 days of sustained swimming at 1.5 BL s–1. Values are mean ± s.e.m. (N=7). HDL, high density, LDL, low density and VLDL, very low density lipoproteins.

 

Figure 3
View larger version (10K):
[in this window]
[in a new window]

  		Fig. 3. Concentrations of phospholipids (PL) (A), triacylglycerol (TAG) (B), and non-esterified fatty acids (NEFA) (C) in the plasma lipoproteins of rainbow trout after 4 days of rest or swimming at 1.5 BL s–1. To allow comparisons between lipid classes, all concentrations are given in µmol fatty acids ml–1 plasma. Absolute PL and TAG concentrations can be obtained by dividing the values presented in A by 2 (2 fatty acids per PL) and in B by 3 (3 fatty acids per TAG). Values are mean ± s.e.m. (N=7). HDL, high density, LDL, low density and VLDL, very low density lipoproteins.

 

Figure 4
View larger version (6K):
[in this window]
[in a new window]

  		Fig. 4. Time course of changes in lipoprotein lipase activity of rainbow trout plasma after injection of 200 or 600 U heparin kg–1 body mass. Values are mean ± s.e.m. (N=8). Letters show significant differences from control values at time 0 (before heparin administration).

 

Figure 5
View larger version (11K):
[in this window]
[in a new window]

  		Fig. 5. Concentrations of triacylglycerol (TAG) (A) and glycerol (B) in rainbow trout plasma after injection of 200 or 600 U heparin kg–1 body mass. Values are means ± s.e.m. (N=8).

 

Figure 6
View larger version (5K):
[in this window]
[in a new window]

  		Fig. 6. Plasma lipoprotein lipase activity before and 1 h after administration of 600 U heparin kg–1 body mass in resting (control) and swimming rainbow trout (4 days at 1.5 BL s–1). Heparin increased LPL activity in both groups (P<0.001), but this effect was not different between resting and swimming fish (P>0.05). Values are means ± s.e.m. (N=9).

 




© The Company of Biologists Ltd 2007