Abiraterone acetate for metastatic castration-resistant prostate cancer is an acetylated prodrug to be hydrolyzed abiraterone. known by pancreatic cholesterol esterase secreted into the intestinal lumen. This study aimed investigate possibility that arylacetamide deacetylase (AADAC) expressed in enterocytes contributes hydrolysis of abiraterone based on its substrate preference. hydrolase activ...

The acidic amino acid residue required for the catalytic activity of rat pancreatic cholesterol esterase has been identified in this study by sequence comparison with other serine esterases and by site-directed mutagenesis experiments. The sequence comparison studies identified 3 acidic residues in homologous domains between cholesterol esterase, acetylcholinesterase, cholinesterase, and Geotri...

Microscopy and leukocyte esterase activity, both employed as screening techniques for urine cultures, were evaluated with respect to two distinct populations, male and female. When 424 urine specimens from males were examined, 95% of the Gram-stained smears and 91% of the leukocyte esterase tests correctly correlated with culture results, indicating significant bacteriuria. There were no signif...

The fruity odours of wine are largely derived from the synthesis of esters and higher alcohols during yeast fermentation. The ATF1- and ATF2-encoded alcohol acetyltransferases of S. cerevisiae are responsible for the synthesis of ethyl acetate and isoamyl acetate esters, while the EHT1-encoded ethanol hexanoyl transferase is responsible for synthesizing ethyl caproate. However, esters such as t...

Sections of frozen-dried stomach mucosa of the rabbit cut at various levels from the surface were analyzed for esterase activity in relation to the proportions of cell types present. Aside from the fraction attributable to extracellular esterase all the esterase activity appears to be in proportion to the numbers of foveolar and neck mucous cells present in the sample.

When human prothrombin is activated in 25 % (weight per volume) sodium citrate, the apparent clotting and esterase activities of thrombin develop at equal rates and reach maximum levels in about 16 hours. Following this, the esterase activity remains stable, but over 90% of the fibrinogen-clotting activity disappears from the system during the next 500 hours. Chromatography of the 16-hour syste...

Subacute ruminal acidosis (SARA) continues to be a common and costly metabolic disorder in high-producing dairy cows worldwide. The objective of this study was evaluate if increasing the concentration physically effective neutral detergent fiber (peNDF) diets can reduce risk SARA fed high-concentrate diet. Thirty second-parity Holstein mid lactation (131 ± 8.3 d milk) were randomly allocated 3 ...