NAVRÁTILOVÁ, Jarmila, Viktor HORVÁTH, Alois KOZUBÍK, Antonín LOJEK and Jan ŠMARDA. p53 induces differentiation but not apoptosis of v-myb-transformed monoblasts. In International Journal of Molecular Medicine,. Greece: Lychnia, Athens, Greece, 2006, p. S38-S38, 1 pp. ISBN 1107-3756.
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Basic information
Original name p53 induces differentiation but not apoptosis of v-myb-transformed monoblasts
Name in Czech p53 indukuje diferenciaci, ale ne apoptózu monoblastů transformovaných onkogenem v-myb
Authors NAVRÁTILOVÁ, Jarmila (203 Czech Republic), Viktor HORVÁTH (203 Czech Republic), Alois KOZUBÍK (203 Czech Republic), Antonín LOJEK (203 Czech Republic) and Jan ŠMARDA (203 Czech Republic, guarantor).
Edition Greece, International Journal of Molecular Medicine, p. S38-S38, 1 pp. 2006.
Publisher Lychnia, Athens, Greece
Other information
Original language English
Type of outcome Proceedings paper
Field of Study Genetics and molecular biology
Country of publisher Greece
Confidentiality degree is not subject to a state or trade secret
Organization unit Faculty of Science
ISBN 1107-3756
Keywords in English Myb; p53; apoptosis; differentiation; monoblast
Tags apoptosis, differentiation, monoblast, Myb, p53
Tags International impact, Reviewed
Changed by Changed by: prof. RNDr. Jan Šmarda, CSc., učo 1223. Changed: 11/4/2007 09:09.
Abstract
p53 is a tumor suppressor protein that protects cells from transformation. In contrast, the v-Myb oncoprotein of avian myeloblastosis virus (AMV) transforms myelomonocytic cells in vitro and induces acute myeloblastic leukemia in vivo. To examine functional interactions of the v-Myb and p53 proteins, we ectopically expressed human p53 in v-Myb-transformed chicken monoblasts BM2. The p53 protein arrested growth in G2 phase of the cell cycle and induced monocytic differentiation, but it did not cause programmed cell death of BM2 cells. Transcriptional activation by v-Myb was up-regulated by the p53 protein, as previously observed during the phorbol ester-induced differentiation of BM2 cells. These results demonstrate that p53 can alter the function of the v-Myb oncoprotein and thus suppress its transforming effect.
Abstract (in Czech)
Protein p53 je nádorový supresor, který buňky chrání před přeměnou na buňku nádorovou.Naopak onkoprotein v-Myb viru ptačí myeloblastózy transformuje myelomonocytické buňky in vitro a indukuje akutní myeloblastickou leukémii in vivo. Abychom prozkoumali funkční interakce proteinů v-Myb a p53, zajistili jsme ektopickou expresi lidského proteinu p53 v kuřecích monoblastech transformovaných v-Myb (BM2). Protein p53 zastavil růst ve fázi G2 buněčného cyklu a indukoval monocytickou diferenciaci, ale nevyvola programovanou buněčnou smrt buněk BM2. V buňkách BM2 exprimujících p53 jsme pozorovali zvýšenou transkripčně aktivační schopnost proteinu v-Myb, podobně jako při jejich diferenciaci vyvolané forbolovým esterem TPA. Tyto výsledky dokumentují, že protein p53 může ovlivnit funkci onkoproteinu v-Myb a tak potlačit jeho transformační účinek.
Links
GA301/06/0036, research and development projectName: Úloha vybraných transkripčních faktorů v osteoklastové diferenciační dráze
Investor: Czech Science Foundation, A role of certain transcription factors in the osteoclastic differentiation pathway
MSM0021622415, plan (intention)Name: Molekulární podstata buněčných a tkáňových regulací
Investor: Ministry of Education, Youth and Sports of the CR, Molecular basis of cell and tissue regulations
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