J 2014

Upregulation of CYP1B1 expression by inflammatory cytokines is mediated by the p38 MAP kinase signal transduction pathway

ŠMERDOVÁ, Lenka, Jana SVOBODOVÁ, Markéta KABÁTKOVÁ, Jiří KOHOUTEK, Dalibor BLAŽEK et. al.

Basic information

Original name

Upregulation of CYP1B1 expression by inflammatory cytokines is mediated by the p38 MAP kinase signal transduction pathway

Authors

ŠMERDOVÁ, Lenka (203 Czech Republic), Jana SVOBODOVÁ (203 Czech Republic, belonging to the institution), Markéta KABÁTKOVÁ (203 Czech Republic, belonging to the institution), Jiří KOHOUTEK (203 Czech Republic), Dalibor BLAŽEK (203 Czech Republic, guarantor, belonging to the institution), Miroslav MACHALA (203 Czech Republic) and Jan VONDRÁČEK (203 Czech Republic)

Edition

Carcinogenesis, Oxford, Oxford University Press, 2014, 0143-3334

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

30204 Oncology

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 5.334

RIV identification code

RIV/00216224:14740/14:00073973

Organization unit

Central European Institute of Technology

UT WoS

000345835800017

Keywords in English

CYP1B1; inflammation; p38 MAP kinase; MSK; metabolism of carcinogens

Tags

International impact, Reviewed
Změněno: 16/12/2019 15:27, Mgr. Marie Šípková, DiS.

Abstract

V originále

Cytochrome P450 1B1 (CYP1B1) is an enzyme that has a unique tumor-specific pattern of expression and is capable of bioactivating a wide range of carcinogenic compounds. We have reported previously that coordinated upregulation of CYP1B1 by inflammatory cytokines, such as tumor necrosis factor-delta(TNF-delta) and the aryl hydrocarbon receptor ligands, may increase bioactivation of promutagens, such as benzo[a]pyrene (BaP) in epithelial cells. Here, we extend those studies by describing a novel mechanism participating in the regulation of CYP1B1 expression, which involves activation of the p38 mitogen-activated protein kinase (p38) and mitogen- and stress-activated protein kinase 1 (MSK1). Using inhibitors of p38 and MSKs, as well as mouse embryonic cells derived from p38delta-deficient and MSK1/2 double knockout mice, we show here that TNF-delta potentiates CYP1B1 upregulation via the p38/MSK1 kinase cascade. Effects of this inflammatory cytokine on CYP1B1 expression further involve the positive transcription elongation factor b (P-TEFb). The inhibition of the P-TEFb subunit, cyclin-dependent kinase 9 (CDK9), which phosphorylates RNA polymerase II (RNAPII), prevented the enhanced CYP1B1 induction by a combination of BaP and inflammatory cytokine. Furthermore, using chromatin immunoprecipitation assays, we found that cotreatment of epithelial cells with TNF-delta and BaP resulted in enhanced recruitment of both CDK9 and RNAPII to the Cyp1b1 gene promoter. Overall, these results have implications concerning the contribution of inflammatory factors to carcinogenesis, since enhanced CYP1B1 induction during inflammation may alter metabolism of exogenous carcinogens, as well as endogenous CYP1B1 substrates playing role in tumor development

Links

CZ.1.05/1.1.00/02.0068, interní kód MU
Name: CEITEC - středoevropský technologický institut (Acronym: CEITEC)
Investor: Ministry of Education, Youth and Sports of the CR, CEITEC - Central European Institute of Technology, 1.1 European Centres of Excellence
CZ.1.07/2.3.00/30.0030, interní kód MU
Name: Rozvoj lidských zdrojů pro oblast buněčné biologie
Investor: Ministry of Education, Youth and Sports of the CR, 2.3 Human resources in research and development
GA14-09979S, research and development project
Name: Role Cdk12 a C-terminální domény RNA polymerázy II v transkripcně regulovaném procesu genomové nestability
Investor: Czech Science Foundation