Effects of cyclopenta[c]phenanthrene and its derivatives on zona radiata protein, ERalpha, and CYP1A mRNA expression in liver of rainbow trout (Oncorhynchus mykiss Walbaum).
Despite cyclopenta-fused polycyclic aromatic hydrocarbons (CP-PAHs) have been detected in the environment, the ability of CP-PAH to induce cellular and tissue responses remains poorly characterized. In this study, xenoestrogen-associated responses (mRNA levels of estrogen receptor alpha, ERalpha, and zona radiata protein, Zrp) and xenobiotic effects (CYP1A mRNA) have been investigated in liver of juvenile rainbow trout after short-term treatment (8 and 24 h) with following compounds administered singly: cyclopenta[c]phenanthrene (CP[c]Ph); its derivatives, 5A-CP[c]Ph; 5A6M-CP[c]Ph; 5A9M-CP[c]Ph; B[c]Ph, a structurally similar polycyclic aromatic hydrocarbon; B[a]P, a model CYP1A inducer; and zearalenone (ZEA), naturally occurring ligand for ER. The CYP1A mRNA expression after 24 h of exposure with CP[c]Ph or its derivatives, except 5A9M-CP[c]Ph, was 3-9-fold higher compared to controls (P<0.05), but it was less than that caused by B[a]P (65-fold up regulation; P<0.01). Moreover, neither of the CP-PAH compounds modulated liver ERalpha or Zrp mRNA levels as compared to effects associated with ZEA. Interestingly, a treatment with this ER-ligand, caused moderate but significant increase of CYP1A mRNA expression (about 2.5-fold; P<0.05). The finding that ZEA is capable of acting as either estrogenic and xenobiotic compound, should be further explored in a more detailed and differently designed experiment.
Department of Environmental Biotechnology, University of Warmia and Mazury, ul. Słoneczna 45G, 10-718 Olsztyn, Poland. maciej.wozny@uwm.edu.pl
Maciej
M
Woźny
Paweł
P
Brzuzan
Michał K
MK
Luczyński
Maciej
M
Góra
Joanna
J
Bidzińska
Paweł
P
Jurkiewicz
D000818:Animals; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics* / Q000378:metabolism; D004527:Egg Proteins / Q000235:genetics* / Q000378:metabolism; D047628:Estrogen Receptor alpha / Q000235:genetics* / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects*; D006067:Gonanes / Q000737:chemistry / Q000494:pharmacology*; D008099:Liver / Q000201:enzymology*; D017686:Oncorhynchus mykiss / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
D004527:Egg Proteins; D047628:Estrogen Receptor alpha; D006067:Gonanes; D012333:RNA, Messenger; C423083:zona radiata protein, fish; C013460:cyclopentaphenanthrene; D019363:Cytochrome P-450 CYP1A1