Faculty: Micheline Piquette-Miller, PhD

Micheline Piquette-Miller, PhDMicheline Piquette-Miller, PhD
Associate Professor

General Research Areas: Drug Metabolism & Distribution
Molecular Regulation of Drug Transport Proteins


Research in my laboratory focuses on understanding the molecular mechanisms involved in regulation of drug transport proteins particularly as it pertains to pathophysiological changes in drug disposition. The influence of disease and endogenous mediators on the gene expression and functionality of transport proteins is examined using a combination of in vivo, in vitro, in situ and molecular biology techniques. The combination of these methods allows us to assess clinical relevance as well as to ascertain the underlying cellular and molecular mechanisms involved.

To date, studies in our laboratory have revealed that inflammatory responses, generated in many disease conditions, alter the expression and activity of the ABC drug efflux transporters in numerous tissues including the liver, kidney, intestine and blood brain barrier. This has the potential to alter the distribution and elimination of many clinically important drugs. Current studies are examining the regulation of drug transporters in the placenta. The placenta serves as a protective barrier for the fetus. Several ABC drug efflux transporters are highly expressed in the placenta and are believed to imit the passage of xenobiotics into the fetus; thereby altering fetal drug exposure. Many prevalent obstetric complications generate an inflammatory response and to date, virtually nothing is known about the impact of maternal disease on the regulation and activity of drug transporters. Therefore, our research group has begun to explore the influence of highly prevalent maternal complications on the ABC- drug transporters and predict how these changes may affect the placental transfer and fetal exposure of drugs used in pregnant women.

Another research direction of the laboratory has focused on examining methods to suppress the the ABC drug efflux transporters in tumor cells, a leading cause of multidrug resistance and drug failure in cancer. This has resulted in collaborative research programs with Dr. Christine Allen and Dr. Ray Reilly with the primary goal to develop novel therapeutics and treatment strategies in the treatment of ovarian and breast cancer. 

PubMed

Selected Publications:

S. Gahir, M. Piquette-Miller.* Gestational and Pregnane X Receptor mediated regulation of placental ABC drug transporters in mice. Drug Metab Dispos. 39:465-71 (2011).

R. De Souza, P. Zahedi, R. Badame, C. Allen, M. Piquette-Miller*. Chemotherapy dosing schedule influences drug resistance development in ovarian cancer. Mol. Cancer Ther. May 6 (2011).

Pollex EK, Anger G, Hutson J, Koren G, Piquette-Miller M*. Breast cancer resistance protein (BCRP)-mediated glyburide transport: effect of the C421A/Q141K BCRP single-nucleotide polymorphism. Drug Metab Dispos. 38:740-4. (2010).

Vassileva V, Piquette-Miller M.* Inflammation: extinguishing the fires within. Clin Pharmacol Ther. 87:375-9 (2010).

Anger GJ, Piquette-Miller M.* Impact of hyperlipidemia on plasma protein binding and hepatic drug transporter and metabolic enzyme regulation in a rat model of gestational diabetes. J Pharmacol Exp Ther. 334:21-32. (2010).

De Souza R, Zahedi P, Moriyama EH, Allen CJ, Wilson BC, Piquette-Miller M*. Continuous docetaxel chemotherapy improves therapeutic efficacy in murine models of ovarian cancer. Mol Cancer Ther. 9:1820-30. (2010).

V. Petrovic, M. Piquette-Miller.* Impact of polyinosinic:polycytidylic acid on placental and hepatobiliary drug transporters in pregnant rats. Drug Metab Dispos. 38:1760-6. (2010).

Anger GJ, Magomedova L, Piquette-Miller M*. Impact of acute streptozotocin-induced diabetes on ABC transporter expression in rats. Chem Biodivers. 6:1943-59. (2009).

V. Vassileva, C. Allen, M. Piquette-Miller *. Effects of sustained and intermittent paclitaxel therapy on tumor repopulation in ovarian cancer. Mol Cancer Ther. 7:630-7. (2008).

V. Petrovic, J Wang, M. Piquette-Miller*. Effect of endotoxin on the expression of placental drug transporters and glyburide disposition in pregnant rats. Drug Metab Dispos. 36:1944-50. (2008).

V. Vassileva, E. Moriyama, R. De Souza, J. Grant, C. Allen, B. Wilson, M. Piquette-Miller*. Efficacy assessment of sustained intraperitoneal paclitaxel therapy in a murine model of ovarian cancer using BLI imaging. Br J Cancer. 99(12):2037-43. (2008).

Contact:

Leslie Dan Faculty of Pharmacy
144 College Street
Toronto, Ontario
M5S 3M2
Phone: 416-946-3057
FAX: 416-978-6395
E-mail: m.piquette.miller@utoronto.ca

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