Abstract

The long term goal of this project is to develop an oral and non-radioactive breath test capable of determining the catalytic activity of CYP3A4 in patients. CYP3A4 appears to be the major single drug metabolizing enzyme present in human liver, and changes in the activity of this enzyme resulting from treatment with certain drugs appear to account in part some drug interactions. In the study proposed, the oral non-radioactive erythromycin breath test will be directly compared to the """"""""gold standard"""""""" intravenously administered carbon-14 test in normal volunteers treated with either an inhibitor of CYP3A4 or an inducer of CYP3A4. The data obtained should determine whether the oral test can replace the intravenous test as a quantitiative measure of intrasubject variation in liver CYP3A4 activity. This would allow studies of liver CYP3A4 activity in children.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR000042-40
Application #
6303632
Study Section
Project Start
1999-12-01
Project End
2001-02-28
Budget Start
Budget End
Support Year
40
Fiscal Year
2000
Total Cost
Indirect Cost

  Institution

Name
University of Michigan Ann Arbor
Department
Type
DUNS #
791277940
City
Ann Arbor
State
MI
Country
United States
Zip Code
48109

  Publications

Robarge, Jason D; Desta, Zereunesay; Nguyen, Anne T et al. (2017) Effects of exemestane and letrozole therapy on plasma concentrations of estrogens in a randomized trial of postmenopausal women with breast cancer. Breast Cancer Res Treat 161:453-461
Crane, Natania A; Jenkins, Lisanne M; Bhaumik, Runa et al. (2017) Multidimensional prediction of treatment response to antidepressants with cognitive control and functional MRI. Brain 140:472-486
Hertz, Daniel L; Speth, Kelly A; Kidwell, Kelley M et al. (2017) Variable aromatase inhibitor plasma concentrations do not correlate with circulating estrogen concentrations in post-menopausal breast cancer patients. Breast Cancer Res Treat 165:659-668
Hertz, D L; Kidwell, K M; Seewald, N J et al. (2017) Polymorphisms in drug-metabolizing enzymes and steady-state exemestane concentration in postmenopausal patients with breast cancer. Pharmacogenomics J 17:521-527
Kadakia, Kunal C; Kidwell, Kelley M; Seewald, Nicholas J et al. (2017) Prospective assessment of patient-reported outcomes and estradiol and drug concentrations in patients experiencing toxicity from adjuvant aromatase inhibitors. Breast Cancer Res Treat 164:411-419
Spengler, Erin K; Kleiner, David E; Fontana, Robert J (2017) Vemurafenib-induced granulomatous hepatitis. Hepatology 65:745-748
Heidemann, Lauren; Law, James; Fontana, Robert J (2017) A Text Searching Tool to Identify Patients with Idiosyncratic Drug-Induced Liver Injury. Dig Dis Sci 62:615-625
Law, Ian H; Alam, Osman; Bove, Edward L et al. (2016) Follow-Up of a Prospective Surgical Strategy to Prevent Intra-Atrial Reentrant Tachycardia After the Fontan Operation. Circ Arrhythm Electrophysiol 9:
Schrepf, Andrew; Harper, Daniel E; Harte, Steven E et al. (2016) Endogenous opioidergic dysregulation of pain in fibromyalgia: a PET and fMRI study. Pain 157:2217-2225
As-Sanie, Sawsan; Kim, Jieun; Schmidt-Wilcke, Tobias et al. (2016) Functional Connectivity is Associated With Altered Brain Chemistry in Women With Endometriosis-Associated Chronic Pelvic Pain. J Pain 17:1-13

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