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Genomic amplification and oncogenic properties of the KCNK9 potassium channel gene

  • David Mu
  • , Liyun Chen
  • , Xiping Zhang
  • , Lei Hoon See
  • , Christina M. Koch
  • , Clifford Yen
  • , James Jiayuan Tong
  • , Lori Spiegel
  • , Ken C.Q. Nguyen
  • , Allyson Servoss
  • , Yue Peng
  • , Lin Pei
  • , Jeffrey R. Marks
  • , Scott Lowe
  • , Timothy Hoey
  • , Lily Yeh Jan
  • , W. Richard McCombie
  • , Michael H. Wigler
  • , Scott Powers
  • Tularik Inc.
  • Cold Spring Harbor Laboratory
  • Amgen Incorporated
  • Duke University
  • University of California at San Francisco

Research output: Contribution to journalArticlepeer-review

224 Scopus citations

Abstract

Representational difference analysis (RDA) of human breast cancer was used to discover a novel amplicon located at chromosomal region 8q24.3. We examined a series of breast cancer samples harboring amplification of this region and determined that KCNK9 is the sole overexpressed gene within the amplification epicenter. KCNK9 encodes a potassium channel that is amplified from 3-fold to 10-fold in 10% of breast tumors and overexpressed from 5-fold to over 100-fold in 44% of breast tumors. Overexpression of KCNK9 in cell lines promotes tumor formation and confers resistance to both hypoxia and serum deprivation, suggesting that its amplification and overexpression plays a physiologically important role in human breast cancer.

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalCancer Cell
Volume3
Issue number3
DOIs
StatePublished - Mar 2003

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