PMID: 38077Mar 1, 1979

Biotransformation of 4'-ethynl-2-fluorobiphenyl in the rat. In vitro and in vivo studies

Drug Metabolism and Disposition : the Biological Fate of Chemicals
H R SullivanR E McMahon


The absorption, metabolism, and plasma pharmacokinetics of a novel anti-inflammatory agent, 4'-ethynyl-2-fluorobiphenyl, was studied in the rat. 4'-[1-14C]Ethynyl-2-fluorobiphenyl was quantitatively absorbed from the gastrointestinal tract. Excretion of radiocarbon into urine was greater than excretion into bile. Appreciate amounts of radiocarbon remained in the carcass 24 hr after dosing. The only metabolite in plasma was (2-fluoro-4'-biphenylyl)acetic acid, which also possessed anti-inflammatory activity. Unchanged 4'-ethynyl-2-fluorobiphenyl was present after administration of higher doses. Peak plasma concentrations of (5-fluoro-4'-biphenylyl)acetic acid were observed within 1 hr of administration. The apparent plasma half-life of this acidic metabolite was 4 hr. The major eliminated metabolite was (4-hydroxy-2-fluoro-4'-biphenylyl)acetic acid. In vivo and in vitro metabolism studies suggest that the major metabolic pathway involves microsomal hydroxylation of the C-H bond of the ethynyl moiety to yield, after rearrangement, a highly reactive intermediate metabolite, 2-fluoro-4'-biphenylylketene.

Related Concepts

Anti-Inflammatory Agents
Metabolic Biotransformation
Biphenyl Compounds
Drug or Chemical Tissue Distribution

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

Computational Methods for Protein Structures

Computational methods employing machine learning algorithms are powerful tools that can be used to predict the effect of mutations on protein structure. This is important in neurodegenerative disorders, where some mutations can cause the formation of toxic protein aggregations. This feed follows the latests insights into the relationships between mutation and protein structure leading to better understanding of disease.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms here.

Related Papers

Xenobiotica; the Fate of Foreign Compounds in Biological Systems
W N WuG W Caldwell
Drug Metabolism and Disposition : the Biological Fate of Chemicals
D K PatelC W Sigel
Xenobiotica; the Fate of Foreign Compounds in Biological Systems
T L AbrahamM M He
Drug Metabolism and Disposition : the Biological Fate of Chemicals
M M HeL A Shipley
© 2021 Meta ULC. All rights reserved