Open AccessTransient Increase in Cellular Dehydrogenase Activity After Cadmium Treatment Precedes Enhanced Production of Reactive Oxygen Species in Human Proximal Tubular Kidney Cells
Author(s) -
Jiří Handl,
Jan Čapek,
Pavlína Majtnerová,
Filip Petira,
Martina Hauschke,
Erika Roušarová,
Tomáš Roušar
Publication year - 2019
Publication title -
physiological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.647
H-Index - 70
eISSN - 1802-9973
pISSN - 0862-8408
DOI - 10.33549/physiolres.934121
Subject(s) - reactive oxygen species , intracellular , oxidative stress , lactate dehydrogenase , dehydrogenase , kidney , glutathione , cadmium , toxicity , chemistry , cell culture , microbiology and biotechnology , biochemistry , biology , enzyme , endocrinology , genetics , organic chemistry
Cadmium is a heavy metal causing toxicity especially in kidney cells. The toxicity is linked also with enhanced oxidative stress leading to cell death. On the other hand, our recent experiments have shown that an increase of total intracellular dehydrogenases activity can also occur in kidney cells before declining until cell death. The aim of the present study, therefore, was to evaluate this transient enhancement in cell viability after cadmium treatment. The human kidney HK-2 cell line was treated with CdCl2 at concentrations 0-200 µM for 2-24 h and intracellular dehydrogenase activity was tested. In addition, we measured reactive oxygen species (ROS) production, glutathione levels, mitochondrial membrane potential, and C-Jun-N-terminal kinase (JNK) activation. We found that significantly increased dehydrogenase activity could occur in cells treated with 25, 100, and 200 µM CdCl2. Moreover, the results showed an increase in ROS production linked with JNK activation following the enhancement of dehydrogenase activity. Other tests detected no relationship with the increased in intracellular dehydrogenase activity. Hence, the transient increase in dehydrogenase activity in HK-2 cells preceded the enhancement of ROS production and our finding provides new evidence in cadmium kidney toxicity.