Protein Information

Name carboxylesterase 1
Synonyms ACAT; Cholesteryl ester hydrolase; CES1; SES 1; SES1; ANAE; Acid esterase; Acyl coenzyme A cholesterol acyltransferase…

Compound Information

Name pyrethrins
CAS pyrethrins

Reference List

PubMed Abstract RScore(About this table)
16167828 Huang H, Fleming CD, Nishi K, Redinbo MR, Hammock BD: Stereoselective hydrolysis of pyrethroid-like fluorescent substrates by human and other mammalian liver carboxylesterases. Chem Res Toxicol. 2005 Sep;18(9):1371-7.

2(0,0,0,2) Details
17442360 Crow JA, Borazjani A, Potter PM, Ross MK: Hydrolysis of pyrethroids by human and rat tissues: examination of intestinal, liver and serum carboxylesterases. Toxicol Appl Pharmacol. 2007 May 15;221(1):1-12. Epub 2007 Mar 12.


Moreover, a 6-fold interindividual variation in carboxylesterase 1 protein expression in human hepatic cytosols was observed.
1(0,0,0,1) Details
16011852 Wheelock CE, Eder KJ, Werner I, Huang H, Jones PD, Brammell BF, Elskus AA, Hammock BD: Individual variability in esterase activity and CYP1A levels in Chinook salmon (Oncorhynchus tshawytscha) exposed to esfenvalerate and chlorpyrifos. Aquat Toxicol. 2005 Aug 30;74(2):172-92.


In contrast, liver carboxylesterase activity was significantly inhibited at both the low and high chlorpyrifos dose exposure (56% and 79% inhibition, respectively), while esfenvalerate exposure still had little effect.
1(0,0,0,1) Details
16169030 Anand SS, Bruckner JV, Haines WT, Muralidhara S, Fisher JW, Padilla S: Characterization of deltamethrin metabolism by rat plasma and liver microsomes. Toxicol Appl Pharmacol. 2006 Apr 15;212(2):156-66. Epub 2005 Sep 16.


The rate constants for liver carboxylesterases were Vmax=1981.8+/-132.3 nmol/h/g liver and Km=172.5+/-22.5 microM.
1(0,0,0,1) Details
16359636 Nishi K, Huang H, Kamita SG, Kim IH, Morisseau C, Hammock BD: Characterization of pyrethroid hydrolysis by the human liver carboxylesterases hCE-1 and hCE-2. Arch Biochem Biophys. 2006 Jan 1;445(1):115-23.

1(0,0,0,1) Details
15777092 Huang H, Stok JE, Stoutamire DW, Gee SJ, Hammock BD: Development of optically pure pyrethroid-like fluorescent substrates for carboxylesterases. Chem Res Toxicol. 2005 Mar;18(3):516-27.


In addition, stereointeraction between carboxylesterases and chiral fluorescent substrates indicated that (i) stereospecificity of recombinant mouse liver carboxylesterases (NCBI accession nos.
1(0,0,0,1) Details
16855054 Godin SJ, Scollon EJ, Hughes MF, Potter PM, DeVito MJ, Ross MK: Species differences in the in vitro metabolism of deltamethrin and esfenvalerate: differential oxidative and hydrolytic metabolism by humans and rats. Drug Metab Dispos. 2006 Oct;34(10):1764-71. Epub 2006 Jul 19.


Results of CE metabolism revealed that human carboxylesterase 1 (hCE-1) was markedly more active toward deltamethrin than the class 1 rat CEs hydrolase A and B and the class 2 human CE (hCE-2); however, hydrolase A metabolized esfenvalerate 2-fold faster than hCE-1, whereas hydrolase B and hCE-1 hydrolyzed esfenvalerate at equal rates.
1(0,0,0,1) Details