Summary
-
1.
O6-methylguanine-DNA methyltransferase (MGMT) mRNA was measured in 50 malignant gliomas that had received 1-(4-amino-2-methyl-5-pyrimidynyl) methyl-3-(2-chloroethyl)-3-nitrosourea hydrochloride (ACNU) after the resection of the tumor by real-time reverse transcription-polymerase chain reaction (RT-PCR) using TaqMan probe.
-
2.
The mean absolute value of MGMTmRNA normalized to the level of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) for 50 tumors was 1.29 × 104± 1.28 × 104 copy/μg RNA (mean ± SD). The amount of MGMTmRNA less than 6 × 103 copy/μg RNA was the most significant factor in predicting the initial effect of treatment with ACNU by multi-variant regression analysis (p = 0.0157).
-
3.
These results suggest that quantitation of MGMTmRNA is the excellent method for predicting for the effect of ACNU in glioma therapy.
Similar content being viewed by others
References
Aldea, C., Alvarez, C. P., Folgueira, L., Delgado, R., and Otero, J. R. (2002). Rapid detection of herpes simplex virus DNA in genital ulcers by real-time PCR using SYBR green I dye as the detection signal. J. Clin. Microbiol. 40:1060–1062.
Arcicasa, M., Roncadin, M., Bortolus, R., Bassignano, G., Boz, G., Franchin, G., De Paoli, A., and Trovo, M. G. (1994). Results of three consecutive combined treatments for malignant gliomas. Ten-year experience at a single institution. Am. J. Clin. Oncol. 17:437–443.
Chomczynski, P., and Sacchi, N. (1987). Single-step methods of RNA isolation by acid guanidinium thiocyanate-phenol-chloroform extraction. Anal. Biochem. 162:156–159.
Heid, C. A., Stevens, J., Livak, K. J., and Williams, P. M. (1996). Real time quantitative PCR. Genome Res. 6:986–994.
Mineura, K., Yanagisawa, T., Watanabe, K., Kowada, M., and Yasui, N. (1996). Human brain tumor O(6)-methylguanine-DNA methyltransferase mRNA and its significance as an indicator of selective chloroethylnitrosourea chemotherapy. Int. J. Cancer 69:420–425.
Mullah, B., Livak, K., Andrus, A., and Kenney, P. (1998). Efficient synthesis of double dye-labeled oligodeoxyribonucleotide probes and their application in a real time PCR assay. Nucleic Acids Res. 26:1026–1031.
Nagane, M., Shibui, S., Oyama, H., Asai, A., Kuchino, Y., and Nomura, K. (1995). Investigation of chemoresistance-related genes mRNA expression for selecting anticancer agents in successful adjuvant chemotherapy for a case of recurrent glioblastoma. Surg. Neurol. 44:462–468.
Saiki, R. K., Gelfand, D. H., Stoffel, S., Scharf, S. J., Higuchi, R., Horn, G. T., Mullis, K. B., and Erlich, H. A. (1988). Primer-directed enzymatic amplification of DNA with a thermostable DNA polymerase. Science 239:487–491.
Silber, J. R., Mueller, B. A., Ewers, T. G., and Berger, M. S. (1993). Comparison of O6-methylguanine-DNA methyltransferase activity in brain tumors and adjacent normal brain. Cancer Res. 53:3416–3420.
Tanaka, S., Kamitani, H., Amin, M. R., Watanabe, T., Oka, H., Fujii, K., Nagashima, T., and Hori, T. (2000). Preliminary individual adjuvant therapy for gliomas based on the results of molecular biological analyzes for drug-resistance genes. J. Neuro-Oncol. 46:157–171.
Tanaka, S., Kobayashi, I., Oka, H., Fujii, K., Watanabe, T., Nagashima, T., and Hori, T. (2003). O6-methylguanine-DNA methyltransferase gene expression in gliomas by quantitative real-time RT-PCR and clinical response to nitrosoureas. Int. J. Cancer 103:67–72.
Tano, K., Shiota, S., Collier, J., Foote, R. S., and Mitra, S. (1990). Isolation and structural characterization of a cDNA clone encoding the human DNA repair protein for O6-alkylguanine. Proc. Natl. Acad. Sci. U.S.A. 87:686–690.
Yoshida, J., Kajita, Y., Wakabayashi, T., and Sugita, K. (1994). Long-term follow up results of 175 patients with malignant glioma: Importance of radical tumor resection and postoperative adjuvant therapy with interferon, ACNU and radiation. Acta. Neurochir. (Wien) 127:55–59.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Tanaka, S., Oka, H., Fujii, K. et al. Quantitation of O6-Methylguanine-DNA Methyltransferase Gene Messenger RNA in Gliomas by Means of Real-Time RT-PCR and Clinical Response to Nitrosoureas. Cell Mol Neurobiol 25, 1067–1071 (2005). https://doi.org/10.1007/s10571-005-8475-0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10571-005-8475-0