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2015 ; 6
(34
): 36383-99
Nephropedia Template TP
gab.com Text
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SP600125 has a remarkable anticancer potential against undifferentiated thyroid
cancer through selective action on ROCK and p53 pathways
#MMPMID26415230
Grassi ES
; Vezzoli V
; Negri I
; Lábadi Á
; Fugazzola L
; Vitale G
; Persani L
Oncotarget
2015[Nov]; 6
(34
): 36383-99
PMID26415230
show ga
Thyroid cancer is the most common endocrine malignancy with increasing incidence
worldwide.The majority of thyroid cancer cases are well differentiated with
favorable outcome. However, undifferentiated thyroid cancers are one of the most
lethal human malignancies because of their invasiveness, metastatization and
refractoriness even to the most recently developed therapies.In this study we
show for the first time a significant hyperactivation of ROCK/HDAC6 pathway in
thyroid cancer tissues, and its negative correlation with p53 DNA binding
ability.We demonstrate that a small compound, SP600125 (SP), is able to induce
cell death selectively in undifferentiated thyroid cancer cell lines by
specifically acting on the pathogenic pathways of cancer development. In detail,
SP acts on the ROCK/HDAC6 pathway involved in dedifferentiation and invasiveness
of undifferentiated human cancers, by restoring its physiological activity level.
As main consequence, cancer cell migration is inhibited and, at the same time,
cell death is induced through the mitotic catastrophe. Moreover, SP exerts a
preferential action on the mutant p53 by increasing its DNA binding ability. In
TP53-mutant cells that survive mitotic catastrophe this process results in p21
induction and eventually lead to premature senescence. In conclusion, SP has been
proved to be able to simultaneously block cell replication and migration, the two
main processes involved in cancer development and dissemination, making it an
ideal candidate for developing new drugs against anaplastic thyroid cancer.