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Research Article

Effect of chronic AICAR treatment on muscle fiber composition and enzyme activity in skeletal muscle of rats

ORCID Icon, ORCID Icon, , , , , & ORCID Icon show all
Pages 89-96 | Received 13 Mar 2020, Accepted 08 Feb 2021, Published online: 26 Feb 2021

Figures & data

Table 1. Primers for cloning and RNA quantitative assay.

Figure 1. Food intake (top) and body weight (bottom) of rats injected with 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR). The final data points represent final values the day before killing. n = 13 rats per group.

Figure 1. Food intake (top) and body weight (bottom) of rats injected with 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR). The final data points represent final values the day before killing. n = 13 rats per group.

Figure 2. Changes in AMPK and ACC phosphorylation in GS muscle from control and AICAR Wistar rats. (A) Representative blots made by using antibody against. (B) Average values for the protein expression. n = 13 muscles per group.

Figure 2. Changes in AMPK and ACC phosphorylation in GS muscle from control and AICAR Wistar rats. (A) Representative blots made by using antibody against. (B) Average values for the protein expression. n = 13 muscles per group.

Figure 3. Representative photomicrographs of the GS in control group (A) and AICAR group (B). Cross-sections of GS muscle stained for myosin ATPase after pre-incubation in pH 4.60–4.65. Magnification of 200× was used (bar = 200 μm). I: fiber type I, black; IIA: fiber type IIA, white; IIB: fiber type IIB, brownness. n = 13 muscles per group.

Figure 3. Representative photomicrographs of the GS in control group (A) and AICAR group (B). Cross-sections of GS muscle stained for myosin ATPase after pre-incubation in pH 4.60–4.65. Magnification of 200× was used (bar = 200 μm). I: fiber type I, black; IIA: fiber type IIA, white; IIB: fiber type IIB, brownness. n = 13 muscles per group.

Table 2. Effect of AICAR treatment on muscle fiber characteristics of Wistar rats

Figure 4. Changes in myosin heavy chain (MyHC) isoform mRNA level in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.

Figure 4. Changes in myosin heavy chain (MyHC) isoform mRNA level in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.

Figure 5. Changes in enzyme activity (succinic dehydrogenase (SDH), malate dehydrogenase (MDH), lactate dehydrogenase (LDH)) in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.

Figure 5. Changes in enzyme activity (succinic dehydrogenase (SDH), malate dehydrogenase (MDH), lactate dehydrogenase (LDH)) in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.

Figure 6. Changes in Peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α), glucose transporter 4 (GLUT-4), Myocyte enhancer factor 2C (MEF2C) mRNA level in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.

Figure 6. Changes in Peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α), glucose transporter 4 (GLUT-4), Myocyte enhancer factor 2C (MEF2C) mRNA level in GS muscle from control and AICAR Wistar rats. n = 13 muscles per group.