Antitumor activity of satraplatin in cisplatin-resistant oral squamous cell carcinoma cells

  • Yukio Yamano
  • , Masashi Shiiba
  • , Kenji Negoro
  • , Ken Nakatani
  • , Atsushi Kasamatsu
  • , Masanobu Yamatoji
  • , Kentaro Sakuma
  • , Kenji Ogoshi
  • , Manabu Iyoda
  • , Keiji Shinozuka
  • , Hidetaka Yokoe
  • , Takeshi Wada
  • , Shigeyuki Fujita
  • , Shunichiro Iwasawa
  • , Yuichi Takiguchi
  • , Hideki Tanzawa
  • , Katsuhiro Uzawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Background. The aim of the current study was to identify the antitumor activity of satraplatin in paired cisplatin (CDDP)-resistant oral squamous cell carcinoma (OSCC) cell line and its parental cell line. Methods. CDDP-resistant (KB-R) cells and parental cells (KB) pair were used. Viability was assessed using the MTT and clonogenic assay. Real-time polymerase chain reaction (PCR), glutathione (GSH) assay, and flow cytometric analysis were used for further assessment. Results. KB-R cells did not show cross-resistance to satraplatin. The expression status of almost all transporters was upregulated in the KB-R cells. There was no difference in the GSH levels between the KB and KB-R cells. Flow cytometric analysis indicated that with satraplatin the G2/M phase was arrested in the KB-R cells. KB-R cells contain enriched side population cells. Conclusion. These data suggested that satraplatin has antitumor activity against the CDDP-resistant OSCC cells. The mechanism of cross-resistance to platinum agents seems to be multifactorial.

Original languageEnglish
Pages (from-to)309-317
Number of pages9
JournalHead and Neck
Volume33
Issue number3
DOIs
Publication statusPublished - Mar 2011
Externally publishedYes

Keywords

  • cisplatin
  • cross-resistance
  • drug resistance
  • satraplatin
  • side population

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