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2018 ; 9
(30
): 21100-21121
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Overexpressing TPTE2 (TPIP), a homolog of the human tumor suppressor gene PTEN,
rescues the abnormal phenotype of the PTEN(-/-) mutant
#MMPMID29765523
Lusche DF
; Buchele EC
; Russell KB
; Soll BA
; Vitolo MI
; Klemme MR
; Wessels DJ
; Soll DR
Oncotarget
2018[Apr]; 9
(30
): 21100-21121
PMID29765523
show ga
One possible approach to normalize mutant cells that are metastatic and
tumorigenic, is to upregulate a functionally similar homolog of the mutated gene.
Here we have explored this hypothesis by generating an overexpressor of TPTE2
(TPIP), a homolog of PTEN, in PTEN(-/-) mutants, the latter generated by targeted
mutagenesis of a human epithelial cell line. Overexpression of TPTE2 normalized
phenotypic changes associated with the PTEN mutation. The PTEN(-/-) -associated
changes rescued by overexpressing TPTE2 included 1) accelerated wound healing in
the presence or absence of added growth factors (GFs), 2) increased division
rates on a 2D substrate in the presence of GFs, 3) adhesion and viability on a 2D
substrate in the absence of GFs, 4) viability in a 3D Matrigel model in the
absence of GFs and substrate adhesion 5) loss of apoptosis-associated annexin V
cell surface binding sites. The results justify further exploration into the
possibility that upregulating TPTE2 by a drug may reverse metastatic and
tumorigenic phenotypes mediated in part by a mutation in PTEN. This strategy may
also be applicable to other tumorigenic mutations in which a homolog to the
mutated gene is present and can substitute functionally.