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Title: Effects of nandrolone decanoate on respiratory and peripheral muscles in male and female rats
Authors: Bisschop, A ×
Gayan-Ramirez, Ghislaine
Rollier, H
Dekhuijzen, P N
Dom, René
De Bock, Vera
Decramer, Marc #
Issue Date: Apr-1997
Series Title: Journal of applied physiology (Bethesda, Md. : 1985) vol:82 issue:4 pages:1112-8
Abstract: Thirty male and 18 female adult rats received weekly an intramuscular injection of either saline (control; C), 1.5 mg/kg (low-dose; LD) nandrolone decanoate or 7.5 mg/kg (high-dose; HD) nandrolone decanoate during 5 wk. Compared with respective C, growth rate was stunted in male HD rats from 2 wk of treatment on, whereas it was enhanced in female LD and HD rats after 1 wk. Mass of all muscles studied varied proportionally to body weight, except for the gastrocnemius (males: 0.49 +/- 0.04 vs. C: 0.52 +/- 0.03%, not significant; females: 0.17 +/- 0.01 vs. C: 0.15 +/- 0.01%, P < 0.05). In vitro contractile and fatigue properties of the diaphragm remained unchanged, except for a decrease in twitch kinetics (time to peak tension: C, 21 +/- 2; LD, 19 +/- 1; HD, 19 +/- 2 ms, P < 0.05; half-relaxation time: C, 26 +/- 5, LD, 25 +/- 5, HD, 23 +/- 3 ms, P < 0.01). Histochemistry of the diaphragm and the gastrocnemius revealed a significant increase in type IIx/b dimensions. In the gastrocnemius, type I fiber dimensions also increased. A pair-fed study, including another 24 female rats, showed that the changes in oral food intake only partly accounted for the observed anabolic effects.
URI: 
ISSN: 8750-7587
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Pneumology
× corresponding author
# (joint) last author

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