title: Constitutive expression of drug metabolizing enzymes and related transcription factors in cattle testis and their modulation by illicit steroids.
abstract: In veterinary species, little information about extrahepatic drug metabolism is actually available. Therefore, the presence of foremost drug metabolizing enzymes (DMEs) and related transcription factors mRNAs was initially investigated in cattle testis; then, their possible modulation following the in vivo exposure to illicit growth promoters (GPs), which represent a major issue in cattle farming, was explored. All target genes were expressed in cattle testis, albeit to a lower extent compared to liver ones; furthermore, illicit protocols containing dexamethasone and 17β-oestradiol significantly up-regulated cytochrome P450 1A1, 2E1, oestrogen receptor-α and peroxisome proliferator-activated receptor-α mRNA levels. Overall, the constitutive expression of foremost DMEs and related transcription factors was demonstrated for the first time in cattle testis and illicit GPs were shown to affect pre-transcriptionally some of them, with possible consequences upon testicular xenobiotic drug metabolism.
authors.affiliation: Dipartimento di Sanità pubblica, Patologia comparata ed Igiene veterinaria, Agripolis Legnaro, Padova, Italy.
authors.forename: Rosa Maria
authors.initials: RM
authors.lastname: Lopparelli
authors.forename: Vanessa
authors.initials: V
authors.lastname: Zancanella
authors.forename: Mery
authors.initials: M
authors.lastname: Giantin
authors.forename: Licia
authors.initials: L
authors.lastname: Ravarotto
authors.forename: Giulio
authors.initials: G
authors.lastname: Cozzi
authors.forename: Clara
authors.initials: C
authors.lastname: Montesissa
authors.forename: Mauro
authors.initials: M
authors.lastname: Dacasto
mesh_terms: D045930:Anabolic Agents / Q000494:pharmacology; D000818:Animals; D002417:Cattle; D003907:Dexamethasone / Q000494:pharmacology; D004958:Estradiol / Q000494:pharmacology; D004967:Estrogens / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects*; D020869:Gene Expression Profiling; D005938:Glucocorticoids / Q000494:pharmacology; D008658:Inactivation, Metabolic; D008297:Male; D011987:Receptors, Steroid / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013737:Testis / Q000187:drug effects / Q000201:enzymology*
chemical_list: D045930:Anabolic Agents; D004967:Estrogens; D005938:Glucocorticoids; D011987:Receptors, Steroid; D004958:Estradiol; D003907:Dexamethasone