Glial cell line-derived neurotrophic factor protein content in rat skeletal muscle is altered by increased physical activity in vivo and in vitro

▶Acetylcholine decreases GDNF content in skeletal muscle. ▶Stretch increases GDNF content in skeletal muscle. ▶GDNF content and endplate size increase in soleus muscle following exercise. ▶GDNF content and endplate size decrease in edl muscle following exercise.