GDF15 knockdown promotes erastin-induced ferroptosis by decreasing SLC7A11 expression

Area of Science:

• Cell Biology
• Cancer Research
• Biochemistry

Background:

• Ferroptosis is an iron-dependent regulated cell death pathway implicated in cancer.
• Growth differentiation factor 15 (GDF15) influences cancer cell properties, but its role in ferroptosis is unknown.
• Solute carrier family 7 member 11 (SLC7A11) is a key regulator of ferroptosis via the system Xc- transporter.

Purpose of the Study:

• To investigate the role of GDF15 in ferroptosis.
• To determine the effect of GDF15 on SLC7A11 expression and system Xc- function.
• To elucidate the mechanism by which GDF15 influences ferroptosis in MGC803 cells.

Main Methods:

• GDF15 knockdown in MGC803 cells.
• CCK8 assay to assess cell viability and ferroptosis.
• Quantitative real-time PCR (qRT-PCR) and Western blotting to measure gene and protein expression.
• Measurement of extracellular glutamate, intracellular glutathione (GSH), and lipid reactive oxygen species (ROS).

Main Results:

• GDF15 knockdown decreased SLC7A11 expression.
• GDF15 knockdown promoted erastin-induced ferroptosis in MGC803 cells.
• GDF15 inhibition attenuated erastin-induced SLC7A11 upregulation.
• GDF15 knockdown led to decreased extracellular glutamate and intracellular GSH, and increased lipid ROS upon erastin treatment.

Conclusions:

• GDF15 knockdown promotes erastin-induced ferroptosis in MGC803 cells.
• This promotion is mediated by the attenuation of SLC7A11 expression and system Xc- function.
• GDF15 plays a significant role in regulating ferroptosis, potentially through modulation of the SLC7A11/system Xc- axis.