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4 protocols using total p38α mapk

1

AMPK Signaling Pathway Regulation

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Cell culture medium and supplements were purchased from GIBCO-BRL (Rockville, MD, USA). Phloretin, the AMPK inhibitor ara-A, the MEK inhibitor PD98059, the JNK inhibitor SP600125, the p38 inhibitor SB203580, and the anti-β actin antibody were purchased from Sigma–Aldrich (St. Louis, MO, USA). Antibodies against phospho-AMPKα (Thr172), total AMPKα, phospho-ERK1/2, total-ERK1/2, phospho-SAPK/JNK, total-SAPK/JNK, phospho-p38α MAPK, and total-p38α MAPK were purchased from Cell Signaling Technology (Beverly, MA, USA).
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2

Antibodies for Signaling Pathway Analysis

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Antibodies recognizing p105/NFκB1 phosphorylated at Ser933, p38α MAPK phosphorylated at its Thr-Gly-Tyr motif, total p38α MAPK, total IRAK4 and glyceraldehyde 3-phosphate dehydrogenase (GAPDH) were from Cell Signalling Technology. An antibody recognizing IRAK4 phosphorylated at both Thr345 and Ser346 was provided by Vikram Rao, Pfizer Inc. (31 (link)). An antibody recognizing JNKs phosphorylated at their Thr-Pro-Tyr motif was from Invitrogen, and a rabbit secondary antibody conjugated to horseradish peroxidase (HRP) was from Pierce.
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3

Signaling Pathway Activation Analysis

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Chemical reagents, including arsenic trioxide (As2O3) and basal medium eagle (BME) were purchased from Sigma-Aldrich (St. Louis, MO). Calf serum (CS) was from GIBCO (Grand Island, NY). The prestained protein marker and protease inhibitor cocktail were from GenDEPOT (Barker, TX). Antibodies against phospho-p38 MAPK, total p38α MAPK, phospho-MSK1, total MSK1, phospho-CREB, total CREB, phospho-ATF2 and total ATF2 were from Cell Signaling Technology, Inc. (Beverly, MA).
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4

Antibody Validation for Signaling Proteins

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Abs recognizing p105/NFκB1 phosphorylated at Ser933, p38α MAPK phosphorylated at its Thr-Gly-Tyr motif, total p38α MAPK, total IRAK4, and GAPDH were from Cell Signaling Technology. An Ab recognizing IRAK4 phosphorylated at Thr345 and Ser346 was provided by V. Rao (Pfizer) (31 (link)). An Ab recognizing JNKs phosphorylated at their Thr-Pro-Tyr motif was from Invitrogen, and a rabbit secondary Ab conjugated to HRP was from Pierce.
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