Biological and clinical importance of the p53 tumor suppressor gene

Victor E. Velculescu, Wafik S. El-Deiry

Research output: Contribution to journalArticlepeer-review


The p53 tumor suppressor gene controls cellular growth after DNA damage through mechanisms involving growth arrest and apoptosis. Mutations that inactivate p53 occur commonly in virtually all human malignancies and can be detected by sequencing of the p53 gene, immunohistochemical staining of tumor tissue with anti-p53 antibodies, single-strand conformation polymorphisms, or other biological assays. Identification of p53 mutation in the germ line is diagnostic of the cancer-prone Li-Fraumeni syndrome. Alterations of the p53 gene result in defective cellular responses after DNA damage and predispose cells to dysregulated growth, tumor formation and progression, and potential resistance (of tumor cells) to certain chemotherapeutic agents or ionizing radiation. A variety of tumors involving mutant p53 have a worse prognosis than tumors of the same type containing no p53 mutations. New diagnostic and therapeutic strategies are evolving as the p53 pathways of cell-cycle arrest and apoptosis become elucidated.

Original languageEnglish (US)
Pages (from-to)858-868
Number of pages11
JournalClinical chemistry
Issue number6 SUPPL.
StatePublished - 1996


  • Apoptosis
  • Bax
  • Cancer
  • Cell cycle
  • Chemoresistance
  • Cyclin
  • Cyclin-dependent kinases
  • DNA damage, mutation
  • GADD45
  • Heritable disorders
  • Immunohistochemistry
  • Li-Fraumeni syndrome
  • MDM2
  • Oncogenes
  • P21
  • Radioresistance
  • SDI1

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Biochemistry, medical


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