Intervention of death-associated protein kinase 1-p53 interaction exerts the therapeutic effects against stroke

Area of Science:

• Neuroscience
• Molecular Biology
• Biochemistry

Background:

• Death-associated protein kinase 1 (DAPK1) interacts with the tumor suppressor p53.
• This interaction involves DAPK1's death domain and p53's DNA-binding motif (p53DM).
• The DAPK1-p53 complex converges multiple cell death pathways relevant to stroke pathogenesis.

Purpose of the Study:

• To investigate the therapeutic efficacy of disrupting the DAPK1-p53 interaction in stroke.
• To determine if targeting this specific molecular interaction offers a novel treatment strategy for stroke.

Main Methods:

• Synthesis of a membrane-permeable p53DM peptide, termed Tat-p53DM.
• Administration of Tat-p53DM in a mouse model of stroke.
• Evaluation of Tat-p53DM's effects on DAPK1-p53 interaction, brain damage, and neurological function.

Main Results:

• Tat-p53DM successfully inhibited the DAPK1-p53 interaction in brain cells in vivo.
• Therapeutic administration of Tat-p53DM, even 6 hours post-stroke onset, significantly reduced brain damage.
• Neurological functions were notably improved in mice treated with Tat-p53DM.

Conclusions:

• The interaction between DAPK1 and p53 represents a viable therapeutic target for stroke.
• Disrupting this interaction holds promise for developing new stroke treatments.
• Tat-p53DM demonstrates potential as a therapeutic agent for stroke intervention.