Paraoxonase 1 (PON1) as a genetic determinant of susceptibility to organophosphate toxicity.

Paraoxonase 1 (PON1) as a genetic determinant of susceptibility to organophosphate toxicity.
复制标题

副氧酶1(PON1)是对有机磷酸盐毒性易感性的遗传决定因素。

DOI:
10.1016/j.tox.2012.07.011
复制
发表时间:
2013-05-10
期刊:
影响因子:
4.5
通讯作者:
Furlong, Clement E.
Furlong, Clement E.
中科院分区:
医学3区
文献类型:
--
作者:
Costa, Lucio G.;Giordano, Gennaro;Cole, Toby B.;Marsillach, Judit;Furlong, Clement E.

文献摘要

参考文献

被引文献

相似文献

对氧磷酶 (PON1) 是一种 A-酯酶,能够水解许多有机磷 (OP) 杀虫剂(例如对硫磷、二嗪磷和毒死蜱)的活性代谢物(氧磷)。 PON1 活性在肝脏和血浆中最高。人 PON1 在编码区(Q192R 和 L55M)显示两种多态性,在启动子和 3'-UTR 区显示多种多态性。 Q192R 多态性赋予某些 OP 底物不同的催化活性,而 –108 (C/T) 位的多态性是 PON1 表达水平差异的主要贡献者。两者都有助于确定个人的 PON1“状态”。动物研究表明,PON1 是 OP 毒性的重要决定因素。给大鼠或小鼠施用外源性 PON1 可保护它们免受特定 OP 的毒性。 PON1基因敲除小鼠对重氮磷和毒死蜱的毒性表现出高度敏感性,但对对氧磷则不然。纯化的 PON192 同种型对特定oxon底物水解的体外催化效率准确地预测了每种同种型提供的体内保护程度。慢慢出现的证据表明,低 PON1 状态可能会增加人类对 OP 毒性的敏感性。动物和人类研究表明,低 PON1 活性也可能导致 OP 的发育毒性和神经毒性。
Paraoxonase (PON1) is an A-esterase capable of hydrolyzing the active metabolites (oxons) of a number of organophosphorus (OP) insecticides such as parathion, diazinon and chlorpyrifos. PON1 activity is highest in liver and in plasma. Human PON1 displays two polymorphisms in the coding region (Q192R and L55M) and several polymorphisms in the promoter and the 3’-UTR regions. The Q192R polymorphism imparts differential catalytic activity toward some OP substrates, while the polymorphism at position –108 (C/T) is the major contributor of differences in the levels of PON1 expression. Both contribute to determining an individual's PON1 “status”. Animal studies have shown that PON1 is an important determinant of OP toxicity. Administration of exogenous PON1 to rats or mice protects them from the toxicity of specific OPs. PON1 knockout mice display a high sensitivity to the toxicity of diazoxon and chlorpyrifos oxon, but not of paraoxon. In vitro catalytic efficiencies of purified PON192 alloforms for hydrolysis of specific oxon substrates accurately predict the degree of in vivo protection afforded by each isoform. Evidence is slowly emerging that a low PON1 status may increase susceptibility to OP toxicity in humans. Low PON1 activity may also contribute to the developmental toxicity and neurotoxicity of OPs, as shown by animal and human studies.
DOI: 10.1086/320600
发表时间: 2001-06-01
影响因子: 9.8
作者:
Brophy, VH;Jampsa, RL;Furlong, CE
通讯作者: Furlong, CE
DOI: 10.1016/0024-3205(94)00515-x
发表时间: 1994-01-01
期刊: LIFE SCIENCES
影响因子: 6.1
作者:
CHAMBERS, JE;MA, TG;CHAMBERS, HW
通讯作者: CHAMBERS, HW
DOI: 10.1093/toxsci/kfr157
发表时间: 2011-09-01
影响因子: 3.8
作者:
Cole, Toby B.;Beyer, Richard P.;Furlong, Clement E.
通讯作者: Furlong, Clement E.
DOI: 10.1042/bj0530110
发表时间: 1953-01-01
影响因子: 4.1
作者:
ALDRIDGE, WN
通讯作者: ALDRIDGE, WN
DOI: 10.1097/00008571-200102000-00009
发表时间: 2001-02-01
期刊: PHARMACOGENETICS
影响因子: --
作者:
Brophy, VH;Hastings, MD;Furlong, CE
通讯作者: Furlong, CE