Copper ion-induced MYH9 polymerization executes cuproptosis.

Copper ion-induced MYH9 polymerization triggers cuproptosis, with 50% of drug-resistant tumor cells showing elevated copper levels facilitating this process.

• Why it matters: Understanding the proteins and mechanisms driving cuproptosis is crucial for developing targeted therapies for diseases involving copper dysregulation, especially drug-resistant tumors.
• What they did: The study identified MYH9 as a key executioner, demonstrating that copper binding causes MYH9 polymerization, disrupting the actin cytoskeleton and inducing cell death through a combination of biochemical and cellular assays.
• The result: These findings reveal MYH9’s role in cuproptosis and suggest that manipulating copper levels or MYH9 activity could offer new treatment strategies for resistant cancers.