A Designed Inhibitor of p53 Aggregation Rescues p53 Tumor Suppression in Ovarian Carcinomas.

(2016) Cancer Cell 29: 90-103

• PubMed: 26748848 Search on PubMedSearch on PubMed Central
• DOI: https://doi.org/10.1016/j.ccell.2015.12.002
• Primary Citation of Related Structures:  
  4RP6,4RP7


• PubMed Abstract: 
  

  Half of all human cancers lose p53 function by missense mutations, with an unknown fraction of these containing p53 in a self-aggregated amyloid-like state. Here we show that a cell-penetrating peptide, ReACp53, designed to inhibit p53 amyloid formation, rescues p53 function in cancer cell lines and in organoids derived from high-grade serous ovarian carcinomas (HGSOC), an aggressive cancer characterized by ubiquitous p53 mutations. Rescued p53 behaves similarly to its wild-type counterpart in regulating target genes, reducing cell proliferation and increasing cell death. Intraperitoneal administration decreases tumor proliferation and shrinks xenografts in vivo. Our data show the effectiveness of targeting a specific aggregation defect of p53 and its potential applicability to HGSOCs.

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Organizational Affiliation: 
• Departments of Biological Chemistry and Chemistry and Biochemistry, UCLA-DOE Institute, HHMI, 611 South Charles E. Young Drive, Los Angeles, CA 90095-1570, USA.
Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA.
Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA.
Pasarow Mass Spectrometry Laboratory, Semel Institute, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.
Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA; Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angles, Los Angeles, CA 90095, USA; The VA Greater Los Angeles Health Care System, Los Angeles, CA 90073, USA. Electronic address: smemarzadeh@mednet.ucla.edu.
Departments of Biological Chemistry and Chemistry and Biochemistry, UCLA-DOE Institute, HHMI, 611 South Charles E. Young Drive, Los Angeles, CA 90095-1570, USA. Electronic address: david@mbi.ucla.edu.
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