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- W2142079504 abstract "Many malignancies result from deletions or loss‐of‐function mutations in one or more tumor suppressor genes, the products of which curb unrestrained growth or induce cell death in those with dysregulated proliferative capacities. Most tumor suppressors act in a cell autonomous manner, and only very few proteins are shown to exert a non‐cell autonomous tumor suppressor function on other cells. Examples of these include members of the s ecreted f rizzled‐ r elated p rotein (SFRP) family and the s ecreted p rotein a cidic and r ich in c ysteine (SPARC)‐related proteins. Very recent findings have, however, considerably expanded our appreciation of non‐cell autonomous tumor suppressor functions. Broadly, this may occur in two ways. Intracellular tumor suppressor proteins within cells could in principle inhibit aberrant growth of neighboring cells by conditioning an antitumor microenvironment through secreted factors. This is demonstrated by an apparent non‐cell autonomous tumor suppressing property of p53. On the other hand, a tumor suppressor produced by a cell may be secreted extracellularly, and taken up by another cell with its activity intact. Intriguingly, this has been recently shown to occur for the p hosphatase and ten sin homolog (PTEN) by both conventional and unconventional modes of secretion. These recent findings would aid the development of therapeutic strategies that seek to reinstate tumor suppression activity in therapeutically recalcitrant tumor cells, which have lost it in the first place. J. Cell. Physiol. 229: 1346–1352, 2014. © 2014 Wiley Periodicals, Inc." @default.
- W2142079504 created "2016-06-24" @default.
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- W2142079504 date "2014-06-27" @default.
- W2142079504 modified "2023-10-04" @default.
- W2142079504 title "Non-Cell Autonomous or Secretory Tumor Suppression" @default.
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