back to vol. 15, b. 1, 2009

Journal of IMAB - Annual Proceeding (Scientific Papers)
Publisher: Peytchinski, Gospodin Iliev
ISSN: 1312-773X (Online)
Issue: Volume 15, book 1, 2009
Subject Collection: Medicine
Page: 6 - 8
DOI: 10.5272/jimab.1512009_6
Online date:June 15, 2009

Mechanisms of cell resistance in glioblastoma multiforme
Victoria Sarafian1, Ilian Koev2, Dmitrii Staykov3
1 Department of Biology; 2 Department of Neurosurgery, 3 Department of General and Clinical Pathology; Medical University - Plovdiv, Bulgaria
SUMMARY: Glioblastoma multiforme is the most common brain tumor in adults. It is characterized by a rapid clinical course and extremely unfavorable prognosis. The etiology and the molecular pathogenetic mechanisms are not entirely clear yet. Active proliferation, resistance to apoptosis and high angiogenicity are basic factors limiting the effect of standard therapy.
A significant problem is the resistance of glioblastoma cells to apoptosis induced by most of antitumor drugs and radiotherapy. The functional activity of several tumor-suppressor genes is inhibited. The antiapoptotic effect of the normal brain matrix and the altered expression of integrin aVb3 act as main regulators of angiogenesis, invasion and proliferation of glioblastoma cells.
Therapeutic strategies are based on cellular and molecular mechanisms leading to: activation of apoptosis, inhibition of growth factors and receptors, and blocking of angiogenesis. Crucial moment in modern therapy is the activation of autophagy. Its effectiveness depends on the expression level of genes mTOR and MTMG. The most promising approach is the complex one combining surgery, radiotherapy and targeted molecular therapy directed simultaneously to different cellular pathogenetic mechanisms.
Key words: glioblastoma, apoptosis, autophagy, resistance.

Page: 6-8; FULL TEXT PDF (151 KB)

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