Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=29765555
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 276.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 276.79999999999995 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\29765555
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Oncotarget
2018 ; 9
(30
): 21495-21511
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
A protein folding molecular imaging biosensor monitors the effects of drugs that
restore mutant p53 structure and its downstream function in glioblastoma cells
#MMPMID29765555
Paulmurugan R
; Afjei R
; Sekar TV
; Babikir HA
; Massoud TF
Oncotarget
2018[Apr]; 9
(30
): 21495-21511
PMID29765555
show ga
Misfolding mutations in the DNA-binding domain of p53 alter its conformation,
affecting the efficiency with which it binds to chromatin to regulate target gene
expression and cell cycle checkpoint functions in many cancers, including
glioblastoma. Small molecule drugs that recover misfolded p53 structure and
function may improve chemotherapy by activating p53-mediated senescence. We
constructed and optimized a split Renilla luciferase (RLUC) complementation
molecular biosensor (NRLUC-p53-CRLUC) to determine small molecule-meditated
folding changes in p53 protein. After initial evaluation of the biosensor in
three different cells lines, we engineered endogenously p53(P98L) mutant (i.e.
not affecting the DNA-binding domain) Ln229 glioblastoma cells, to express the
biosensor containing one of four different p53 proteins: p53(wt), p53(Y220C),
p53(G245S) and p53(R282W). We evaluated the consequent phenotypic changes in
these four variant cells as well as the parental cells after exposure to
PhiKan083 and SCH529074, drugs previously reported to activate mutant p53
folding. Specifically, we measured induced RLUC complementation and consequent
therapeutic response. Upon stable transduction with the p53 biosensors, we
demonstrated that these originally p53(P98L) Ln229 cells had acquired p53
cellular phenotypes representative of each p53 protein expressed within the
biosensor fusion protein. In these engineered variants we found a differential
drug response when treated with doxorubicin and temozolomide, either
independently or in combination with PhiKan083 or SCH529074. We thus developed a
molecular imaging complementation biosensor that mimics endogenous p53 function
for use in future applications to screen novel or repurposed drugs that counter
the effects of misfolding mutations responsible for oncogenic structural changes
in p53.