PrP(C) regulates epidermal growth factor receptor function and cell shape dynamics in Neuro2a cells.

Area of Science:

• Neuroscience
• Cell Biology
• Biochemistry

Background:

• The prion protein (PrP) is crucial in prion diseases.
• The physiological role of the normal cellular prion protein (PrP(C)) is not well understood.
• PrP(C) is a cell-surface glycoprotein involved in cellular functions and signal transduction.

Purpose of the Study:

• To investigate PrP(C)-dependent gene expression changes.
• To determine the role of PrP(C) in cell cycle, growth, proliferation, and cell shape maintenance.
• To elucidate the involvement of PrP(C) in MAP kinase, AKT, and EGFR signaling pathways.

Main Methods:

• Gene expression profiling in N2a cells with altered PrP(C) levels.
• Cell proliferation and cell cycle assays.
• Analysis of intracellular signaling pathways (MAPK, AKT) and protein interactions (EGFR).

Main Results:

• PrP(C) overexpression enhances cell proliferation and cell cycle re-entrance.
• PrP(C) silencing inhibits cell cycle progression.
• PrP(C) regulates MAP kinase and AKT pathways, partly via modulation of EGFR.
• PrP(C) influences filopodia formation through Rho GTPase signaling.

Conclusions:

• PrP(C) plays a significant role in regulating gene expression, cell cycle, and cell shape.
• PrP(C) interacts with EGFR and modulates key signaling pathways (MAPK, AKT).
• Understanding PrP(C) functions provides insights into prion diseases and cellular processes.