Cytostatic effect of inostamycin, an inhibitor of cytidine 5′-diphosphate 1,2-diacyl-sn-glycerol (CDP-DG): Inositol transferase, on oral squamous cell carcinoma cell lines

Yuh Baba, Mamoru Tsukuda, Izumi Mochimatsu, Shigeru Furukawa, Hiroko Kagata, Yoji Nagashima, Shinri Koshika, Masaya Imoto, Yasumasa Kato

Research output: Contribution to journalArticle

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Abstract

Inostamycin, which was recently isolated from Streptomyces sp. MH816-AF15 as an inhibitor of cytidine 5′-diphosphate 1,2-diacyl-sn-glycerol (CDP-DG): inositol transferase, caused a G1-phase accumulation in the cell cycle of small cell lung carcinomas. To investigate whether the cytostatic effect of inostamycin is restricted to lung carcinoma cell lines or applicable to other type of cells, we tested five oral squamous cell carcinoma (SCC) cell lines. Cell growth was suppressed in 62.5-125 ng/ml inostamycin in the culture medium in all oral cancer cell lines tested, with non-viable cells being < 1%, indicating inostamycin is cytostatic on SCC cell lines. Decrease in cyclin D1 mRNA and protein expression due to the inostamycin treatment was accompanied by suppression of phosphorylated retinoblastoma susceptibility gene product (pRB-P) levels. Moreover, flow cytometric analysis showed that inostamycin induced an increase in G1/G0 cells (1.2-3.2 fold) over 24 h. These results suggest that inostamycin is a useful agent for tumour dormant cytostatic therapy for oral SCC.

Original languageEnglish
Pages (from-to)613-620
Number of pages8
JournalCell Biology International
Volume25
Issue number7
DOIs
Publication statusPublished - 2001

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CDP-Diacylglycerol-Inositol 3-Phosphatidyltransferase
Cytostatic Agents
Squamous Cell Carcinoma
Cell Line
Retinoblastoma Genes
Mouth Neoplasms
Cyclin D1
Small Cell Lung Carcinoma
G1 Phase
Streptomyces
inostamycin
Culture Media
Cell Cycle
Carcinoma
Lung
Messenger RNA

Keywords

  • Cyclin D1
  • Cytostatic effect
  • Inostamycin
  • Oral cancer
  • Retinoblastoma

ASJC Scopus subject areas

  • Cell Biology

Cite this

Cytostatic effect of inostamycin, an inhibitor of cytidine 5′-diphosphate 1,2-diacyl-sn-glycerol (CDP-DG) : Inositol transferase, on oral squamous cell carcinoma cell lines. / Baba, Yuh; Tsukuda, Mamoru; Mochimatsu, Izumi; Furukawa, Shigeru; Kagata, Hiroko; Nagashima, Yoji; Koshika, Shinri; Imoto, Masaya; Kato, Yasumasa.

In: Cell Biology International, Vol. 25, No. 7, 2001, p. 613-620.

Research output: Contribution to journalArticle

Baba, Yuh ; Tsukuda, Mamoru ; Mochimatsu, Izumi ; Furukawa, Shigeru ; Kagata, Hiroko ; Nagashima, Yoji ; Koshika, Shinri ; Imoto, Masaya ; Kato, Yasumasa. / Cytostatic effect of inostamycin, an inhibitor of cytidine 5′-diphosphate 1,2-diacyl-sn-glycerol (CDP-DG) : Inositol transferase, on oral squamous cell carcinoma cell lines. In: Cell Biology International. 2001 ; Vol. 25, No. 7. pp. 613-620.
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