Publication date: Available online 31 January 2018
Source:Biochimica et Biophysica Acta (BBA) - Reviews on Cancer
Author(s): Bartosz Wawrzynow, Alicja Zylicz, Maciej Zylicz
Organized networks of heat shock proteins, which possess molecular chaperone activity, protect cells from abrupt environmental changes. Additionally, molecular chaperones are essential during stress-free periods, where they moderate housekeeping functions. During tumorigenesis these chaperone networks are extensively remodeled in such a way that they are advantageous to the transforming cell. Molecular chaperones by buffering critical elements of signaling pathways empower tumor evolution leading to chemoresistance of cancer cells. Controversially, the same molecular chaperones, which are indispensable for p53 in reaching its tumor suppressor potential, are beneficial in adopting an oncogenic gain of function phenotype when TP53 is mutated. On the molecular level, heat shock proteins by unwinding the mutant p53 protein expose aggregation-prone sites leading to the sequestration of other tumor suppressor proteins causing inhibition of apoptosis and chemoresistance. Therefore, within this review therapeutic approaches combining classical immuno- and/or chemotherapy with specific inhibition of selected molecular chaperones shall be discussed.
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