Chk1 inhibition significantly potentiates activity of nucleoside analogs in TP53-mutated B-lymphoid cells
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F16%3A00506414" target="_blank" >RIV/68081707:_____/16:00506414 - isvavai.cz</a>
Alternative codes found
RIV/00159816:_____/16:00065981 RIV/00216224:14310/16:00088918 RIV/00216305:26620/16:PU120162 RIV/00027162:_____/16:N0000035 RIV/65269705:_____/16:00065981
Result on the web
<a href="http://www.oncotarget.com/index.php?journal=oncotarget&page=article&op=download&path%5B%5D=11388&path%5B%5D=36488" target="_blank" >http://www.oncotarget.com/index.php?journal=oncotarget&page=article&op=download&path%5B%5D=11388&path%5B%5D=36488</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.18632/oncotarget.11388" target="_blank" >10.18632/oncotarget.11388</a>
Alternative languages
Result language
angličtina
Original language name
Chk1 inhibition significantly potentiates activity of nucleoside analogs in TP53-mutated B-lymphoid cells
Original language description
Treatment options for TP53-mutated lymphoid tumors are very limited. In experimental models, TP53-mutated lymphomas were sensitive to direct inhibition of checkpoint kinase 1 (Chk1), a pivotal regulator of replication. We initially tested the potential of the highly specific Chk1 inhibitor SCH900776 to synergize with nucleoside analogs (NAs) fludarabine, cytarabine and gemcitabine in cell lines derived from B-cell malignancies. In p53-proficient NALM-6 cells, SCH900776 added to NAs enhanced signaling towards Chk1 (pSer317/pSer345), effectively blocked Chk1 activation (Ser296 autophosphorylation), increased replication stress (p53 and eta-H2AX accumulation) and temporarily potentiated apoptosis. In p53-defective MEC-1 cell line representing adverse chronic lymphocytic leukemia (CLL), Chk1 inhibition together with NAs led to enhanced and sustained replication stress and significantly potentiated apoptosis. Altogether, among 17 tested cell lines SCH900776 sensitized four of them to all three NAs. Focusing further on MEC-1 and co-treatment of SCH900776 with fludarabine, we disclosed chromosome pulverization in cells undergoing aberrant mitoses. SCH900776 also increased the effect of fludarabine in a proportion of primary CLL samples treated with pro-proliferative stimuli, including those with TP53 disruption. Finally, we observed a fludarabine potentiation by SCH900776 in a T-cell leukemia 1 (TCL1)-driven mouse model of CLL. Collectively, we have substantiated the significant potential of Chk1 inhibition in B-lymphoid cells.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10601 - Cell biology
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
OncoTarget
ISSN
1949-2553
e-ISSN
—
Volume of the periodical
7
Issue of the periodical within the volume
38
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
62091-62106
UT code for WoS article
000387164700097
EID of the result in the Scopus database
—