AICAR-stimulated PAS-160 phosphorylation is greatest in TA muscle.
The time courses of AICAR-stimulated Akt substrate phosphorylation at a
molecular weight of 160 (PAS-160) and AMPK Thr-172 phosphorylation
(P-AMPK) in vivo were determined by injecting mice with
AICAR subcutaneously for 0 (control), 10, 30, or 60 min. PAS-160 and P-AMPK
were measured in soleus (A) and tibialis anterior muscle (B)
lysates by immunoblotting. α-Tubulin was utilized as a loading control.
Maximal PAS-160 (C) and P-AMPK (D) phosphorylation between
soleus, TA, and EDL muscle was compared by immunoblotting lysates from the
30-min time points. A paired immunoblot for AS160 is included in panel
C. The data are expressed as the means ± S.E. (n = 3-8).
a-c, 1-3, groups within each panel not marked by the same
letter or number are statistically different. Groups annotated by letters
cannot be compared with groups annotated by numbers. *, AICAR
stimulation for a given muscle had a statistically significant effect on
phosphorylation compared with basal, p < 0.05.