The authors have no conflicts of interest to disclose.
Exploring glyoxalase 1 expression in prostate cancer tissues: Targeting the enzyme by ethyl pyruvate defangs some malignancy-associated properties
Version of Record online: 16 SEP 2013
© 2013 Wiley Periodicals, Inc.
Volume 74, Issue 1, pages 48–60, January 2014
How to Cite
Baunacke, M., Horn, L.-C., Trettner, S., Engel, K. M.Y., Hemdan, N. Y.A., Wiechmann, V., Stolzenburg, J.-U., Bigl, M. and Birkenmeier, G. (2014), Exploring glyoxalase 1 expression in prostate cancer tissues: Targeting the enzyme by ethyl pyruvate defangs some malignancy-associated properties. Prostate, 74: 48–60. doi: 10.1002/pros.22728
- Issue online: 6 DEC 2013
- Version of Record online: 16 SEP 2013
- Manuscript Accepted: 19 AUG 2013
- Manuscript Received: 7 APR 2013
- Sächsische Aufbaubank – SAB
- Europäischen Sozialfond – ESF. Grant Number: 100098250
- glyoxalase 1;
- prostate cancer;
- ethyl pyruvate;
The glyoxalase (GLO)1 is part of a ubiquitous detoxification system in the glycolytic pathway of normal and tumor cells. It protects against cellular damage caused by cytotoxic metabolites.
Aiming at exploring the role of GLO1 in prostate cancer, we evaluated and targeted the expression of GLO1 in prostate cancer tissues and cell lines and analyzed its correlation with grading systems and tumor growth indices.
Immunohistochemical studies on 37 prostate cancer specimens revealed a positive correlation between Helpap-grading and the cytoplasmic (P = 0.002)/nuclear (P = 0.006) GLO1 level. A positive correlation between Ki-67 proliferation marker and the cytoplasmic GLO1 (P = 0.006) was evident. Furthermore, the highest GLO1 level was detected in the androgen-sensitive LNCaP compared to the androgen-independent Du-145 and PC-3 prostate cell lines and the breast cancer cell MCF-7, both at protein and mRNA level. Treating cancer cells with ethyl pyruvate was found to defang some malignancy-associated properties of cancer cells including proliferation, invasion and anchorage-independent growth. In vitro results revealed that the potency of ethyl pyruvate is increased when cells are metabolically activated by growth stimulators, for example, by fetal calf serum, dihydrotestosterone, tumor growth factor-β1 and leptin.
The positive correlation of GLO1 expression level in prostate cancer tissues with the pathological grade and proliferation rate may assign GLO1 as a risk factor for prostate cancer development and progression. Furthermore, our data indicate that inhibitors of GLO1 might be useful to decelerate the cancer cell growth by a novel therapeutic approach that we may call “induced metabolic catastrophe.” Prostate 74:48–60, 2014. © 2013 Wiley Periodicals, Inc.