Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. COA of Formula: C7H4ClNO3. Introducing a new discovery about 1750-45-4, Name is 5-Chloro-6-hydroxybenzo[d]oxazol-2(3H)-one
Impaired 6-hydroxychlorzoxazone elimination in patients with kidney disease: Implication for cytochrome P450 2E1 pharmacogenetic studies
Objective: The purposes of this study were (1) to describe the disposition of chlorzoxazone and 6-hydroxychlorzoxazone in patients with kidney disease, (2) to develop a population pharmacokinetic model including covariates that may influence the pharmacokinetic variability of both compounds, and (3) to examine the effect of covariates on the chlorzoxazone metabolic ratio. Methods: Twenty-one subjects received a single oral dose of chlorzoxazone, 250 mg, and plasma and urine samples were collected for up to 120 hours. The impact of creatinine clearance (CLcr), age, and weight on chlorzoxazone and 6-hydroxychlorzoxazone clearance terms was assessed with NONMEM software (v.5, level 1.1; Globomax LLC, Hanover, Md) by use of a stepwise backward-elimination technique and the likelihood ratio test. Results: A linear model with first-order absorption for chlorzoxazone and first-order formation for 6-hydroxychlorzoxazone simultaneously described the disposition of both compounds. Weight was a significant predictor of 6-hydroxychlorzoxazone formation clearance and other, unaccounted for clearance of chlorzoxazone, whereas CLcr was a significant predictor of 6-hydroxychlorzoxazone renal clearance. No relationship between CLcr. and formation clearance was observed. The 6-hydroxychlorzoxazone area under the plasma concentration-time curve was inversely related to CLcr, even within the range of normal renal function, resulting in chlorzoxazone metabolic ratio values that were substantially higher in subjects with kidney disease. Both the experimental data and model-based Monte Carlo simulations revealed greatly increased chlorzoxazone metabolic ratio values when CLcr was low and weight was high. Conclusions: Although cytochrome P450 (CYP) 2E1 activity, as estimated by 6-hydroxychlorzoxazone formation clearance, was not affected by kidney disease, the chlorzoxazone metabolic ratio was substantially elevated in these subjects. The results of this study show that the commonly used plasma-based chlorzoxazone metabolic ratio is dependent on renal function and, therefore, does not provide a reliable index of CYP2E1-mediated metabolism.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.COA of Formula: C7H4ClNO3, you can also check out more blogs about1750-45-4
Reference£º
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem