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AMPK Pathway Assay (CAT#: STEM-MB-0358-WXH)

Introduction

AMP-activated protein kinase (AMPK) signaling pathway, a fuel sensor and regulator, promotes ATP-producing and inhibits ATP-consuming pathways in various tissues. AMPK is exists as a heterotrimeric complex composed of a catalytic α subunit and regulatory β and γ subunits.
AMPK is a central regulator of cellular energy homeostasis, playing critical roles in regulating growth and reprogramming metabolism as well as in cellular processes including autophagy and cell polarity. The kinase is activated in response to stresses that deplete ATP supplies such as low glucose, hypoxia, ischemia, and heat shock. AMPK activation works through direct phosphorylation of multiple enzymes directly involved in these processes as well as through transcriptional control of metabolism by phosphorylating transcription factors, co-activators, and co-repressors.




Principle

Binding of AMP to the γ subunit allosterically activates the complex, making it a more attractive substrate for its major upstream AMPK kinase, LKB1. In response to low ATP levels, AMPK activation promotes signaling pathways that generate more ATP, including fatty acid oxidation and autophagy, and inhibits anabolic ATP-consuming processes including gluconeogenesis, lipid and protein synthesis. When nutrients are scarce, AMPK also acts as a metabolic checkpoint inhibiting cellular growth. For example, activation of AMPK enhances both the transcription and translocation of GLUT4, resulting in an increase in insulin-stimulated glucose uptake. In addition, it also stimulates catabolic processes such as fatty acid oxidation and glycolysis via inhibition of ACC and activation of PFK2.

Applications

To study the effect of each virus on AMPK signaling pathway
To study the effects of drugs or therapies on AMPK signaling pathways
To study the regulation mechanism of AMPK signal pathway in disease

Procedure

• Luminex Multiplex Assay
• Enzyme-linked immunosorbent assay (ELISA)
• Flow cytometry (FACS analysis) technology

Notes

Detectable targets: AICAR, PI3K, Ras, AKT, mTOR, p70S6K, S6, Raf, Erk, p90RSK, RHEB, eEF2K, p53, PFKFB3, MYL2, MBSB5, MYPT1, ATGL, Tau, p21, HuR, CyclinA, CyclinB, FAK1, LKB1, PRKACA, AMPKα, AMPKβ, AMPKy, HDAC4, HDAC5, HDAC7, FOXO, HNF4, Torc2, CREB, PGC1, CRY1, SirT1, ACC, MCD, CPT1, eNOS, HSL, FAS, SREBP1, HMGCR, PFK2, GSK3, GS, MEF, GEF, PLCB, Gaq, CaMKK, Sestrin, PP2C, AMP, ATP

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