Loss of p130 accelerates tumor development in a mouse model for human small-cell lung carcinoma

Bethany E. Schaffer, Kwon Sik Park, Gloria Yiu, Jamie F. Conklin, Chenwei Lin, Deborah L. Burkhart, Anthony Karnezis, E. Alejandro Sweet-Cordero, Julien Sage

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

Small-cell lung carcinoma (SCLC) is a neuroendocrine subtype of lung cancer. Although SCLC patients often initially respond to therapy, tumors nearly always recur, resulting in a 5-year survival rate of less than 10%. A mouse model has been developed based on the fact that the RB and p53 tumor suppressor genes are mutated in more than 90% of human SCLCs. Emerging evidence in patients and mouse models suggests that p130, a gene related to RB, may act as a tumor suppressor in SCLC cells. To test this idea, we used conditional mutant mice to delete p130 in combination with Rb and p53 in adult lung epithelial cells. We found that loss of p130 resulted in increased proliferation and significant acceleration of SCLC development in this triple-knockout mouse model. The histopathologic features of the triple-mutant mouse tumors closely resembled that of human SCLC. Genome-wide expression profiling experiments further showed that Rb/p53/p130-mutant mouse tumors were similar to human SCLC. These findings indicate that p130 plays a key tumor suppressor role in SCLC. Rb/p53/p130-mutant mice provide a novel preclinical mouse model to identify novel therapeutic targets against SCLC.

Original languageEnglish (US)
Pages (from-to)3877-3883
Number of pages7
JournalCancer Research
Volume70
Issue number10
DOIs
StatePublished - May 15 2010
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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