Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\29156676
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Oncotarget
2017 ; 8
(49
): 84685-84696
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Uncoupling TORC2 from AGC kinases inhibits tumour growth
#MMPMID29156676
Cameron AJM
; Veeriah S
; Marshall JJT
; Murray ER
; Larijani B
; Parker PJ
Oncotarget
2017[Oct]; 8
(49
): 84685-84696
PMID29156676
show ga
Mammalian target of rapamycin (mTOR) is a central regulator of growth and
metabolism. mTOR resides in two distinct multi-protein complexes - mTORC1 and
mTORC2 - with distinct upstream regulators and downstream targets. While it is
possible to specifically inhibit mTORC1 with rapamycin, or inhibit both mTOR
complexes together with ATP pocket directed mTOR kinase inhibitors, it is not
possible to assess the specific roles for mTORC2 pharmacologically. To overcome
this, we have developed a novel, inducible, dominant negative system for
disrupting substrate recruitment to mTORC2. Previously we identified the mTORC2
specific subunit Sin1 as a direct binding partner for AGC kinases Akt and PKC.
Sin1 mutants, which retain the ability to bind Rictor and mTOR, but fail to
recruit their AGC client kinases, inhibit AKT and PKC priming and block cell
growth. In this study, we demonstrate that uncoupling mTORC2 from AGC kinases in
DLD1 colon cancer cells inhibits Akt activation and blocks tumour growth in vivo.
Further we demonstrate, using time resolved two-site amplified FRET (A-FRET)
analysis of xenograft tumours, that inhibition of tumour growth correlates with
the degree of mTORC2 uncoupling from its downstream targets, as demonstrated for
Akt. These data add weight to the body of evidence that mTORC2 represents a
pharmacological target in cancer independently of mTORC1.