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The role of contortrostatin, a snake venom disintegrin, in the inhibition of tumor progression and prolongation of survival in a rodent glioma model. | LitMetric

AI Article Synopsis

  • Malignant gliomas are difficult to treat due to their ability to invade surrounding brain tissue, making complete surgical removal impossible, necessitating new therapeutic approaches to inhibit this invasion.
  • Recent research indicates that contortrostatin, derived from snake venom, can specifically target glioma cells by binding to certain integrins, which reduces their mobility and invasiveness by interrupting their interaction with the extracellular matrix (ECM).
  • In studies using mice, contortrostatin demonstrated the ability to inhibit tumor growth and prolong survival without significant neurotoxic side effects, suggesting its potential as a new treatment option for malignant gliomas.

Article Abstract

Object: Malignant gliomas are not curable because of diffuse brain invasion. The tumor cells invade the surrounding brain tissue without a clear tumor-brain demarcation line, making complete resection impossible. Therapy aimed at inhibition of invasion is crucial not only for prevention of tumor spread, but also for selectively blocking migrating cells that may be more resistant to chemotherapy and radiation. Recently, investigations have shown that the snake venom disintegrin contortrostatin specifically binds to certain integrins on the surface of glioma cells and thereby inhibits their interaction with the extracellular matrix (ECM), resulting in a blockage of cell motility and invasiveness. To translate these in vitro findings into clinical settings, the authors examined the effect of contortrostatin on glioma progression in a rodent model.

Methods: Athymic mice were intracranially or subcutaneously injected with U87 glioma cells, and the effect of intratumorally administered contortrostatin on tumor progression and animal survival was then studied. In addition, the authors evaluated the pharmacological safety of contortrostatin use in the brains of tumor-free animals.

Conclusions: The results demonstrate that contortrostatin is able to inhibit tumor growth and angiogenesis and to prolong survival in a rodent glioma model. Moreover, contortrostatin appears to be well tolerated by the animal and lacks obvious neurotoxic side effects. Thus, contortrostatin may have potential as a novel therapeutic agent for the treatment of malignant gliomas.

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Source
http://dx.doi.org/10.3171/jns.2005.103.3.0526DOI Listing

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