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Cytotoxicity of L-cycloserine against human neuroblastoma and medulloblastoma cells is associated with the suppression of ganglioside expression

Cinatl, Jindrich, Kotchetkov, Rouslan, Pouckova, Pavla, Vogel, Jens-Uwe, Rabenau, Holger F, Michaelis, Martin, Kornhuber, B. (1999) Cytotoxicity of L-cycloserine against human neuroblastoma and medulloblastoma cells is associated with the suppression of ganglioside expression. Anticancer research, 19 (6B). pp. 5349-5354. ISSN 0250-7005. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

BACKGROUND Human neuroblastoma and medulloblastoma express abnormal ganglioside patterns especially GD2 and GM2 which are important for tumour growth. We tested the effects of L-cycloserine (L-CS), a potent inhibitor of synthesis of glycosphingolipids, on the growth, viability and expression of GD2 and GM2 in neuroblastoma and medulloblastoma cells. MATERIALS AND METHODS The cytotoxic effects of L-CS were tested using the MTT dye reduction assay on four neuroblastoma (IMR-32, SK-N-SH, UKF-NB-2 and UKF-NB-3), two medulloblastoma (D283 and D341) and normal human fibroblasts and epithelial cell lines. In some experiments cytotoxicity of L-CS was tested in the presence of exogenous GD2 and GM2. The expression of GD2 and GM2 was analysed by flow cytometry. The antitumoral effects of L-CS in vivo were assessed on established xenografts of UKF-NB-3 or D283 cells in athymic (nude) mice using systemic administration of the drug (150 mg/kg intraperitoneally, once per day on 20 consecutive days). RESULTS In vitro experiments revealed that L-CS was toxic for tumour cells at concentrations ranging from 0.5 to 20 micrograms/ml without any significant effects on normal fibroblasts and epithelial cells. L-CS treatment of UKF-NB-3 and D283 cells significantly inhibited expression of GD2 and GM2. The addition of exogenous GD2 and GM2 to culture medium partially prevented cytotoxic effects of L-CS on tumour cells. In vivo treatment resulted in complete tumour regression of UKF-NB-3 xenografts whereas growth of D283 xenografts was reduced by 60%. CONCLUSIONS L-CS is a selective antitumoral agent for neuroblastoma and medulloblastoma cells with the ability to reduce expression of tumour associated gangliosides. In vivo experiments suggest that L-CS may be effective drug for treatment of neuroblastoma and medulloblastoma.

Item Type: Article
Uncontrolled keywords: G(D2); G(M2); L-cycloserine; Medulloblastoma; Neuroblastoma; Nude mice
Subjects: R Medicine > RM Therapeutics. Pharmacology
Divisions: Faculties > Sciences > School of Biosciences
Depositing User: Martin Michaelis
Date Deposited: 24 Apr 2014 10:13 UTC
Last Modified: 29 May 2019 12:31 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40834 (The current URI for this page, for reference purposes)
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