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
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
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 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 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\27124407
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2016 ; 11
(4
): e0154125
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
A High-Throughput Cell-Based Screen Identified a
2- (E)-2-Phenylvinyl -8-Quinolinol Core Structure That Activates p53
#MMPMID27124407
Bechill J
; Zhong R
; Zhang C
; Solomaha E
; Spiotto MT
PLoS One
2016[]; 11
(4
): e0154125
PMID27124407
show ga
p53 function is frequently inhibited in cancer either through mutations or by
increased degradation via MDM2 and/or E6AP E3-ubiquitin ligases. Most agents that
restore p53 expression act by binding MDM2 or E6AP to prevent p53 degradation.
However, fewer compounds directly bind to and activate p53. Here, we identified
compounds that shared a core structure that bound p53, caused nuclear
localization of p53 and caused cell death. To identify these compounds, we
developed a novel cell-based screen to redirect p53 degradation to the
Skip-Cullin-F-box (SCF) ubiquitin ligase complex in cells expressing high levels
of p53. In a multiplexed assay, we coupled p53 targeted degradation with Rb1
targeted degradation in order to identify compounds that prevented p53
degradation while not inhibiting degradation through the SCF complex or other
proteolytic machinery. High-throughput screening identified several leads that
shared a common 2-[(E)-2-phenylvinyl]-8-quinolinol core structure that stabilized
p53. Surface plasmon resonance analysis indicated that these compounds bound p53
with a KD of 200 ± 52 nM. Furthermore, these compounds increased p53 nuclear
localization and transcription of the p53 target genes PUMA, BAX, p21 and FAS in
cancer cells. Although p53-null cells had a 2.5±0.5-fold greater viability
compared to p53 wild type cells after treatment with core compounds, loss of p53
did not completely rescue cell viability suggesting that compounds may target
both p53-dependent and p53-independent pathways to inhibit cell proliferation.
Thus, we present a novel, cell-based high-throughput screen to identify a
2-[(E)-2-phenylvinyl]-8-quinolinol core structure that bound to p53 and increased
p53 activity in cancer cells. These compounds may serve as anti-neoplastic agents
in part by targeting p53 as well as other potential pathways.