Chronic Cadmium Exposure Lead to Inhibition of Serum and Hepatic Alkaline Phosphatase Activity in Wistar Rats.

Abstract:

:Alkaline phosphatase (ALP) activity in the serum and liver from rats administered with cadmium (Cd) in drinking water was studied. After metal administration, Cd showed a time-dependent accumulation in the liver, meanwhile metallothionein had a maximum increase at 1 month, remaining in this level until the end of the study. On the other hand, serum and liver ALP activity was decreased after 3 months exposure. To determine if Cd produced an inhibition on enzyme, apo-ALP prepared from both nonexposed and exposed rats was reactivated with Zn, showing 60% more activity as compared with the enzyme isolated from nonexposed rats. In vitro assays showed that Cd-ALP was partially reactivated with Zn; however, in the presence of cadmium, Zn-ALP was completely inhibited. Kinetic studies indicate a noncompetitive inhibition by Cd; these results suggest that Cd can substitute Zn, and/or Cd can interact with nucleophilic ligands essential for the enzymatic activity.

journal_name

J Biochem Mol Toxicol

authors

Treviño S,Andrade-García A,Herrera Camacho I,León-Chavez BA,Aguilar-Alonso P,Flores G,Brambila E

doi

10.1002/jbt.21732

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

587-94

issue

12

eissn

1095-6670

issn

1099-0461

journal_volume

29

pub_type

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