Subcellular Organelle Toxicity Caused by Arsenic Nanoparticles in Isolated Rat Hepatocytes

Rashid Jahangirnejad, Mehdi Goudarzi, Heibatullah Kalantari, Hossein Najafzadeh, Mohsen Rezaei

Abstract


Background: Arsenic, an environmental pollutant, is a carcinogenic metalloid and also an anticancer agent.

Objective: To evaluate the toxicity of arsenic nanoparticles in rat hepatocytes.

Methods: Freshly isolated rat hepatocytes were exposed to 0, 20, 40, and 100 μM of arsenic nanoparticles and its bulk counterpart. Their viability, reactive oxygen species level, glutathione depletion, mitochondrial and lysosomal damage, and apoptosis were evaluated.

Results: By all concentrations, lysosomal damage and apoptosis were clearly evident in hepatocytes exposed to arsenic nanoparticles. Evaluation of mitochondria and lysosomes revealed that lysosomes were highly damaged.

Conclusion: Exposure to arsenic nanoparticles causes apoptosis and organelle impairment. The nanoparticles have potentially higher toxicity than the bulk arsenic. Lysosomes are highly affected. It seems that, instead of mitochondria, lysosomes are the first target organelles involved in the toxicity induced by arsenic nanoparticles.


Keywords


Arsenic; Nanoparticles; Oxidative stress; Chemical and drug induced liver injury; Apoptosis



doi: 10.15171/ijoem.2020.1614


 pISSN: 2008-6520
 eISSN: 2008-6814

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