Clinical significance of the trimethadione tolerance test in chronic hepatitis: A useful indicator of hepatic drug metabolizing capacity |
| |
Authors: | Masato Abei Einosuke Tanaka Naomi Tanaka Yasushi Matsuzaki Tadashi Ikegami Akio Ishikawa Toshiaki Osuga |
| |
Institution: | 1. Department of Gastroenterology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennoudai, 305, Tsukuba, Ibaraki, Japan 2. Department of Forensic Science, Institute of Community Medicine, University of Tsukuba, 1-1-1 Tennoudai, 305, Tsukuba, Ibaraki, Japan 3. Department of Surgery, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennoudai, 305, Tsukuba, Ibaraki, Japan
|
| |
Abstract: | Trimethadione (TMO) was chosen as an indicator of quantitative hepatic microsomal function, and its pharmacokinetics were
studied in 52 patients with chronic hepatitis. Findings in these patients were compared with those for 26 healthy subjects
and 13 patients with renal failure. Patients with chronic hepatitis, but not those with renal failure, showed significant
reduction in clearance (CL) and prolongation of half-life (t1/2), and the extent of abnormalities was found to reflect the severity of histologic changes in liver tissue. The serum dimethadione
(DMO)/TMO ratio 4h after the administration of TMO altered in parallel with the CL and t1/2 of TMO, and abnormalities in this simple ratio were also related to the histologic severity of changes in the liver tissue.
A low DMO/TMO ratio (<0.4) was associated with advanced histologic changes (chronic active hepatitis with bridging or chronic
active hepatitis with cirrhosis), whereas a high DMO/TMO ratio (>0.4) was associated with mild histologic changes (chronic
persistent hepatitis or chronic active hepatitis) (sensitivity, 0.81; specificity, 0.86). These results indicate that the
DMO/TMO ratio, which can be obtained from a single blood sampling, reflects the histologic severity of changes in tissue liver,
and that the TMO tolerance test is a useful indicator of quantitative liver function. |
| |
Keywords: | trimethadione hepatic drug metabolism liver function tests chronic liver disease chronic hepatitis |
本文献已被 SpringerLink 等数据库收录! |
|