Which signaling cascade mediates insulin-stimulated GLUT4 translocation to the plasma membrane?

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Multiple Choice

Which signaling cascade mediates insulin-stimulated GLUT4 translocation to the plasma membrane?

Insulin-stimulated GLUT4 translocation is driven by the PI3K-Akt signaling cascade. When insulin binds its receptor, IRS proteins recruit and activate PI3K, which converts PIP2 to PIP3 at the membrane. PIP3 recruits and activates PKB/Akt, and active Akt phosphorylates targets like AS160/TBC1D4. This relieves a brake on Rab GTPases that control GLUT4-containing vesicle trafficking, allowing these vesicles to move to and fuse with the plasma membrane, increasing GLUT4 on the cell surface and glucose uptake. The other pathways listed are not the main drivers of GLUT4 translocation in response to insulin. cAMP-PKA is more related to energy balance and different hormonal effects; JAK-STAT is typical for cytokine signaling; MAPK is associated with growth and differentiation signals.

Insulin-stimulated GLUT4 translocation is driven by the PI3K-Akt signaling cascade. When insulin binds its receptor, IRS proteins recruit and activate PI3K, which converts PIP2 to PIP3 at the membrane. PIP3 recruits and activates PKB/Akt, and active Akt phosphorylates targets like AS160/TBC1D4. This relieves a brake on Rab GTPases that control GLUT4-containing vesicle trafficking, allowing these vesicles to move to and fuse with the plasma membrane, increasing GLUT4 on the cell surface and glucose uptake.

The other pathways listed are not the main drivers of GLUT4 translocation in response to insulin. cAMP-PKA is more related to energy balance and different hormonal effects; JAK-STAT is typical for cytokine signaling; MAPK is associated with growth and differentiation signals.

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