Journal: The FASEB Journal
Article Title: Impaired myoblast differentiation and muscle IGF‐1 receptor signaling pathway activation after N‐glycosylation inhibition
doi: 10.1096/fj.202400213rr
Figure Lengend Snippet: FIGURE 4 IGF-1 production and IGF1R signaling pathway activation in TA muscle of WT and MLC/mIgf-1 mice treatment with low TUN dose (0.1 mg/kg of TUN for 15 days). (A) Expression of endogenous Igf-1 mRNA isoforms (i.e., Igf-1Ea and Igf-1Ec mRNAs) and total Igf-1 (i.e., endogenous and mIgf-1 transgene mRNAs) in the TA muscle of WT (n = 3) and MLC/mIgf-1 (n = 3) mice treated with TUN. (B) Representative immunoblotting and (C) band densitometry analysis of TA muscle of WT and MLC/mIgf1 mice using an antibody directed against mature mouse IGF-1 sequence. Three bands at a molecular weight of ~22, ~17, and ~12 kDa were detected in TA muscle of MLC/ mIgf1 mice. Recombinant mouse IGF-1 mature protein was loaded as a positive control for mature IGF-1 (~7 kDa). (D) Representative immunoblotting and (E) band densitometry analysis of TA muscle of WT and MLC/mIgf1 mice using antibodies directed against phosphorylated (pIGF1R) and total IGF1R, phosphorylated (pAKT) and total AKT, and phosphorylated (pERK1/2) and total ERK1/2. All bar charts are presented as mean values ± SD. Significant differences were determined using unpaired t-test (C) or two-way ANOVA followed by Tukey's multiple comparison post hoc tests (A, E). *Significantly different compared to CTR; #Significantly different compared to WT mice; * and # p ≤ .05; ** p ≤ .01 *** and ### p ≤ .001.
Article Snippet: Primary antibodies against phospho- IGF1R β (1:2000; cat. n. 3024 Cell Signaling Technology), total IGF1R β (1:2000; cat. n. 3027 Cell Signaling Technology), phospho- Akt (Ser473) (1:2000; cat. n. 9271 Cell Signaling Technology), total Akt (1:2000; cat. n. 9272 Cell Signaling Technology), phospho- p44/42 (ERK1/2) (1:2000; cat. n. 9101 Cell Signaling Technology), total p44/42 (ERK1/2) (1:2000; cat. n. 9102 Cell Signaling Technology), PCNA (1:5000, cat. n. MAB 424R Millipore), MF20 (1:500, DSHB), and mouse/rat biotinylated IGF- 1 antibody (1:300, cat. n. BAF791 R&D Systems) were incubated overnight at 4°C.
Techniques: Activation Assay, Expressing, Western Blot, Sequencing, Molecular Weight, Recombinant, Positive Control, Comparison