Detailed knowledge of drug metabolism is relevant information provided by preclinical drug development research. Oxidative enzymes such as those belonging to P450 family of cytochromes (CYP) play a prominent role in drug metabolism. Here, we propose an innovative method based on bioluminescence in vivo imaging which has the potential to simplify the in vivo measurement of CYP activity also providing a dynamic measure of the effects of a drug on a specific P450 enzyme complex in a living mouse. The method is based on a pro-luciferin which can be converted into the active luciferase substrate by a specific P450 activity. The pro-luciferin is administered to a luciferase reporter mouse which produces luminescent signals in relation to the cytochrome activity present in each tissue. The photon emission generated can be easily localized and quantified by optical imaging. To demonstrate the validity of the system, we pharmacologically induced hepatic Cyp3a in the reporter mouse and proved that pro-luciferin administration generates a Cyp3a selective signal in the chest area that can be efficiently detected by optical imaging. The kind of tool generated has the potential to be exploited for the study of additional CYPs. (C) 2012 Elsevier Ltd. All rights reserved.
Molecular imaging of cytochrome P450 activity in mice / C. Roncoroni, N. Rizzi, E. Brunialti, J. Cali, D. Klaubert, A. Maggi, P. Ciana. - In: PHARMACOLOGICAL RESEARCH. - ISSN 1043-6618. - 65:5(2012 May), pp. 531-536.
|Titolo:||Molecular imaging of cytochrome P450 activity in mice|
RONCORONI, CHIARA (Primo)
MAGGI, ADRIANA CATERINA (Penultimo)
CIANA, PAOLO (Ultimo)
|Parole Chiave:||CYP3A4; Drug interaction; Liver metabolism; Luciferase; Luminescent substrate; Reporter mice|
|Settore Scientifico Disciplinare:||Settore BIO/14 - Farmacologia|
|Data di pubblicazione:||mag-2012|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.phrs.2012.02.006|
|Appare nelle tipologie:||01 - Articolo su periodico|