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2015 ; 9
(3
): 165-73
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Targeting prion protein interactions in cancer
#MMPMID26110608
Santos TG
; Lopes MH
; Martins VR
Prion
2015[]; 9
(3
): 165-73
PMID26110608
show ga
In recent years, prion protein (PrP(C)) has been considered as a promising target
molecule for cancer therapies, due its direct or indirect participation in tumor
growth, metastasis, and resistance to cell death induced by chemotherapy. PrP(C)
functions as a scaffold protein, forming multiprotein complexes on the plasma
membrane, which elicits distinct signaling pathways involved in diverse
biological phenomena and could be modulated depending on the cell type, complex
composition, and organization. In addition, PrP(C) and its partners participate
in self-renewal of embryonic, tissue-specific stem cells and cancer stem cells,
which are suggested to be responsible for the origin, maintenance, relapse, and
dissemination of tumors. Interference with protein-protein interaction has been
recognized as an important therapeutic strategy in cancer; indeed, the possible
interference in PrP(C) engagement with specific partners is a novel strategy.
Recently, our group successfully used that approach to interfere with the
interaction between PrP(C) and HSP-90/70 organizing protein (HOP, also known as
stress-inducible protein 1 - STI1) to control the growth of human glioblastoma in
animal models. Thus, PrP(C)-organized multicomplexes have emerged as feasible
candidates for anti-tumor therapy, warranting further exploration.