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Critical Reviews™ in Oncogenesis
SJR: 0.631 SNIP: 0.503 CiteScore™: 2

ISSN Imprimir: 0893-9675
ISSN On-line: 2162-6448

Critical Reviews™ in Oncogenesis

DOI: 10.1615/CritRevOncog.v5.i1.40
pages 69-105

Defined Tumor Cell-Host Interactions Are Necessary for Malignant Growth

Neidhard Paweletz
Growth and Division of the Cell/0430, Research Program IV, German Cancer Research Center, Postfach 101949, 69009 Heidelberg
Hans-Jurgen Boxberger
Growth and Division of the Cell/0430, Research Program IV, German Cancer Research Center, Postfach 101949, 69009 Heidelberg

RESUMO

Analyzing the different steps of malignant growth (primary tumor, metastasizing tumor cells, secondary tumor), one recognizes an intense interaction between normal and malignant cells. Tumor cells not only induce activities of normal cells, which normally are rarely activated, but also they exploit properties of normal cells for their own purposes. The major mechanisms and processes of this "parasitism" are described in more detail and the results are discussed. Tumors cannot grow beyond a certain size without a supply of blood and lymph vessels by the host (angiogenesis). Metastasizing tumor cells cannot leave the vessel (extravasate) in which they are transported without the cooperation of the respective endothelial cells of the host. An appropriate environment formed by the host tissues is essential for the settlement of tumor cells at secondary sites. Historically, these are a few examples that show intense cooperation between host and tumor. More are given in the present contribution.


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