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- Title
Inositol 1,4,5-trisphosphate (IP<sub>3</sub>) receptor type1 (IP<sub>3</sub>R1) modulates the acquisition of cisplatin resistance in bladder cancer cell lines.
- Authors
Tsunoda, Toshiyuki; Koga, Hirofumi; Yokomizo, Akira; Tatsugami, Katsunori; Eto, Masatoshi; Inokuchi, Junichi; Hirata, Akira; Masuda, Katsuaki; Okumura, Koji; Naito, Seiji
- Abstract
To investigate the molecules that regulate the acquisition of cis-diamminedichloroplatinum (II) (cisplatin) resistance, we performed cDNA microarrays using two pairs of parental and cisplatin-resistant bladder cancer cell lines. We found a markedly reduced expression of inositol 1,4,5-trisphosphate (IP3) receptor type1 (IP3R1), endoplasmic reticulum membrane protein, in cisplatin-resistant cells. The suppression of IP3R1 expression using small interfering RNA in parental cells prevented apoptosis and resulted in decreased sensitivity to cisplatin. Contrarily, overexpression of IP3R1 in resistant cells induced apoptosis and increased sensitivity to cisplatin. These results suggest that cisplatin-induced downregulation of IP3R1 expression was closely associated with the acquisition of cisplatin resistance in bladder cancer cells.Oncogene (2005) 24, 1396-1402. doi:10.1038/sj.onc.1208313 Published online 20 December 2004
- Subjects
INOSITOL; CISPLATIN; METAL-ammonia compounds; CANCER cells; CELLULAR pathology; MEMBRANE proteins
- Publication
Oncogene, 2005, Vol 24, Issue 8, p1396
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/sj.onc.1208313