“Vicious circles” of glioblastoma tumors: vascularization and invasiveness

Journal Title: Advances in Hygiene and Experimental Medicine - Year 2012, Vol 66, Issue 0

Abstract

Glioblastoma multiforme is the most common and a particularly aggressive form of glial primary brain tumors. This malignancy accounts for ca. 70% of all diagnosed cases. Unfortunately, average survival of glioma patients does not exceed one year from diagnosis. Specific vascularization pattern (presence of numerous microvessels and glomerular vessels) and exceptional invasiveness are characteristic features of glioblastoma tumors. Both of these features reflect complex underlying processes forming two vicious circles. Common to both of these circles is the state of tumor underoxygenation. Hypoxia that occurs in the vicinity of abnormal tumor blood vessels stimulates formation of novel microvessels and invasiveness of tumor cells. In their essence, both of the vicious circles are processes allowing tumor cells to adapt to an underoxygenated tumor milieu. These processes play an important role in tumor progression, which reflects a specific type of evolution of cancer cells. Late effects of this evolution include appearance of highly aggressive, chemo- and radiotherapy resistant neoplastic cells. Increased adaptation capabilities of such cancer cells have a negative influence on the therapeutic process. Effective therapeutic strategies should not be directed against single cancer cell markers; instead, they should be targeted so as to break both vicious cycles. Herein we discuss several such strategies. In our opinion, effective therapeutic approaches must include a combination of several agents that recognize and simultaneously break both vicious cycles, i.e. vascularization and invasiveness. Also, agents that decrease hypoxia in cancer cells, for example drugs inhibiting activity of HIF-1α, might also prove therapeutically effective in such approaches.

Authors and Affiliations

Stanisław Szala, Magdalena Jarosz, Ryszard Smolarczyk, Tomasz Cichoń

Keywords

Related Articles

The role of metalloproteinases in modification of extracellular matrix in invasive tumor growth, metastasis and angiogenesis

Extracellular matrix metalloproteinases (MMPs) are a family of endopeptydases which recquire a zinc ion at their active site, for proteolityc activity. There are six members of the MMP family: matrilysins, collagenases,...

Receptory aktywowane proliferatorami peroksysomów (PPAR). Właściwości antyproliferacyjne

Receptory aktywowane proliferatorami peroksysomów, oznaczane skrótem PPAR (peroxisome proliferator-activated receptors), to czynniki transkrypcyjne, należące do rodziny jądrowych receptorów hormonów. Ich główną rolą je...

The role of IRA B cells in selected inflammatory processes

Pierwsze doniesienie o odkryciu nowych, dotychczas nieznanych komórek układu odpornościowego – komórek IRA B (Innate Response Activator B cells), czyli limfocytów B aktywujących odpowiedź nieswoistą – pojawiło się w 2012...

Zakażenia EBV – cykl życiowy, metody diagnostyki, chorobotwórczość

Wirus Epsteina-Barr (EBV) jest szeroko rozpowszechniony na całym świecie. Szacuje się, że około 90–95% populacji dorosłych przeszło infekcję tym patogenem. EBV jest przede wszystkim czynnikiem etiologicznym mononukleoz...

Liza komórek bakteryjnych w procesie uwalniania bakteriofagów – kanoniczne i nowo poznane mechanizmy

Uwalnianie z zainfekowanej bakterii namnożonych w niej bakteriofagów jest warunkiem rozprzestrzeniania się zakażenia. Tylko fagi filamentokształtne są wydzielane z komórki, nie powodując jej destrukcji. Uwalnianie pozost...

Download PDF file
  • EP ID EP66822
  • DOI -
  • Views 119
  • Downloads 0

How To Cite

Stanisław Szala, Magdalena Jarosz, Ryszard Smolarczyk, Tomasz Cichoń (2012). “Vicious circles” of glioblastoma tumors: vascularization and invasiveness . Advances in Hygiene and Experimental Medicine, 66(0), 888-900. https://europub.co.uk/articles/-A-66822