Detailed Information on Publication Record
2008
Interference of PAHs and their N-heterocyclic analogs with signaling of retinoids.
BENÍŠEK, Martin, Luděk BLÁHA and Klára HILSCHEROVÁBasic information
Original name
Interference of PAHs and their N-heterocyclic analogs with signaling of retinoids.
Name in Czech
Narušení signálování retinoidů polycyklickými aromatickými uhlovodíky a jejich N-heterocyclickými analogy
Authors
BENÍŠEK, Martin (203 Czech Republic), Luděk BLÁHA (203 Czech Republic) and Klára HILSCHEROVÁ (203 Czech Republic, guarantor)
Edition
Toxicology in vitro, 2008, 0887-2333
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
30304 Public and environmental health
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 2.473
RIV identification code
RIV/00216224:14310/08:00025289
Organization unit
Faculty of Science
UT WoS
000261583800014
Keywords (in Czech)
retinoidy; PAHs; N-PAHs; QSAR
Keywords in English
retinoids; PAHs; N-PAHs; quantitative structure-activity relationship
Tags
International impact, Reviewed
Změněno: 25/6/2009 08:37, prof. RNDr. Luděk Bláha, Ph.D.
V originále
Interference of PAHs and their N-heterocyclic analogs with signaling of retinoids. Retinoids are dietary hormones acting through nuclear receptors for retinoic acid, important especially during embryonic development. This study focuses on the disruption of signaling pathways of retinoids by polycyclic aromatic hydrocarbons (PAHs) and their N-heterocyclic analogs (N-PAHs), important environmental contaminants with numerous biological effects. In vitro test with P19/A15 cell line stably transfected with luciferase reporter gene under control of retinoic acid responsive elements was used to investigate both direct activation of retinoic acid receptors and modulation of response induced by natural ligand all-trans-retinoic acid (ATRA) by 26 PAHs and N-PAHs. While none of individual compounds alone activated retinoic acid receptors, many of them modulated ATRA-mediated activity both after 6 h and 24 h exposure. Majority of compounds active after 6 h downregulated ATRA - mediated activity (most effective were two analogs of dibenz[a,h]anthracene with LOECs about 185 nM), while most compounds active after 24 h upregulated the effects of ATRA (most effective benz[a]acridine and dibenz[a,i]acridine caused 400% induction of ATRA response). Quantitative Structure-Activity Relationship analysis identified molecular volume and dipole moment as the most important descriptors of inhibitory effects after 6h, while length, total molecular energy, gap-HOMO/LUMO and Van der Waals energy are important descriptors for stimulatory effects of PAHs and N-PAHs. This study demonstrates that abundant pollutants such as PAHs and their analogs interfere in vitro with retinoid signaling, which could play role in some in vivo effects of these organic contaminants such as teratogenicity.
In Czech
Narušení signálování retinoidů polycyklickými aromatickými uhlovodíky a jejich N-heterocyclickými analogy ve studii in vitro.
Links
| GP525/05/P160, research and development project |
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| MSM0021622412, plan (intention) |
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| 2B08036, research and development project |
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