C2C12 myoblasts were plated in 6‐well culture dishes at a confluency of 60%. The next day GPR109A gene silencing was obtained by transfection of predesigned siRNA sequences (Cat# AM16708, Life Technologies) using Lipofectamine® 2000 reagent (Cat# 11668‐027, Life Technologies) according to the manufacturer's instructions. Control cells were transfected with a scrambled siRNA sequence (Cat# AM4642, Life Technologies) as a negative control. At 24 h following transfection, C2C12 were treated with 1 μg/ml lipopolysaccharides (LPS; O111:B4, Sigma‐Aldrich) for 3 h according to published procedures (Frost et al, 2003 (link)). NaB 3 mM (den Besten et al, 2015 (link)) (Cat# 303410 Life Technologies), T0070907 1 μM (Cat# 2301, Tocris UK), MK1903 (Cat# 4622, Tocris UK), and rosiglitazone (Cat# 5325, Tocris UK) were preincubated 1 h before the LPS stimulation.
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