Related Experiment Video
Updated: Jul 18, 2026
Zika Virus Infection of Cultured Human Fetal Brain Neural Stem Cells for Immunocytochemical Analysis
Published on: February 5, 2018
Effect of sodium azide on the metabolic activity of cultured fetal cells
Takaki Ishikawa1, Bao-Li Zhu, Hitoshi Maeda
1Department of Legal Medicine, Osaka City University Medical School, Asahi-machi 1-4-3, Abeno, Osaka 545-8585, Japan. takaki@med.osaka-cu.ac.jp
Abstract:
Sodium azide is a highly toxic substance. However, the mechanism of its toxicity has not been fully established. In the present study, we attempted to investigate the toxicity of sodium azide in various cultured fetal cells, using changes in cellular respiration as an indicator of metabolic inhibition to elucidate tissue-specificity. The human fetal cell lines used in this study included myocardial cells, nerve cells, fibroblasts, hepatocytes and renal tubular epithelial cells. The cells were seeded in wells at a density of 2 x 10(6)cells/2mL, sodium azide was added at a concentration of 0.01 ng/mL to 10 microg/mL, and the respiration of each type of cell was measured 1 h later using a dissolved oxygen meter. The concentration at which sodium azide inhibited metabolic activity was lower in the nerve and myocardial cells than in the fibroblasts, hepatocytes and renal tubular epithelial cells. These findings may serve to clarify the dynamic mechanisms of sodium azide toxicity in vivo.
Insights
Sodium azide toxicity varies by cell type. Nerve and myocardial cells showed higher sensitivity to sodium azide compared to fibroblasts, hepatocytes, and renal cells, indicating tissue-specific metabolic inhibition.
Area of Science:
- Toxicology
- Cell Biology
- Biochemistry
Background:
- Sodium azide is a known toxicant, but its precise toxicity mechanisms remain unclear.
- Understanding tissue-specific toxicity is crucial for assessing health risks.
Purpose of the Study:
- To investigate the toxicity of sodium azide in various human fetal cell lines.
- To determine tissue-specific sensitivity to sodium azide by measuring metabolic inhibition.
Main Methods:
- Utilized human fetal myocardial, nerve, fibroblast, hepatocyte, and renal tubular epithelial cells.
- Exposed cells to a range of sodium azide concentrations (0.01 ng/mL to 10 microg/mL).
- Measured cellular respiration using a dissolved oxygen meter as an indicator of metabolic activity.
Main Results:
- Sodium azide inhibited metabolic activity at lower concentrations in nerve and myocardial cells.
- Fibroblasts, hepatocytes, and renal tubular epithelial cells demonstrated higher tolerance to sodium azide.
- Differential sensitivity suggests a tissue-specific mechanism of sodium azide toxicity.
Conclusions:
- Sodium azide exhibits differential toxicity across various fetal cell types.
- Nerve and myocardial cells are more susceptible to sodium azide-induced metabolic inhibition.
- Findings contribute to understanding in vivo sodium azide toxicity mechanisms.
