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Published on: June 21, 2015
In vitro inhibition of rotavirus multiplication by copper oxide nanoparticles
M Hossieni1, S J Kiani1, A Tavakoli2
1Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Insights
Copper oxide nanoparticles (CuO NPs) show significant antiviral activity against rotavirus, a leading cause of childhood gastroenteritis. CuO NPs effectively reduced rotavirus titers, suggesting potential for new treatments against this common viral infection.
Area of Science:
- Nanotechnology
- Virology
- Materials Science
Background:
- Group A rotaviruses cause severe gastroenteritis in children globally, leading to significant mortality, especially in low-income regions.
- Current rotavirus treatments are supportive, highlighting the urgent need for novel antiviral agents.
- Copper oxide nanoparticles (CuO NPs) exhibit known antiviral properties and diverse industrial applications.
Purpose of the Study:
- To investigate the antiviral efficacy of copper oxide nanoparticles (CuO NPs) against rotaviruses.
- To assess the cytotoxic effects of CuO NPs on MA-104 cells.
- To evaluate the anti-rotavirus activity of CuO NPs using viral titer and molecular assays.
Main Methods:
- Cytotoxicity was determined using the methyl thiazolyl tetrazolium (MTT) assay.
- Antiviral activity was assessed via TCID50 assays and real-time PCR.
- Virucidal effects of CuO NPs on rotavirus were specifically examined.
Main Results:
- Non-toxic concentrations of CuO NPs did not reduce viral titer in infected cells.
- Significant virucidal effects of CuO NPs against rotavirus were observed at 80 and 100 μg/ml (P<0.001).
- CuO NPs demonstrated significant antiviral activity against rotavirus replication.
Conclusions:
- Copper oxide nanoparticles exhibit potent antiviral activity against rotavirus.
- Potential mechanisms include disruption of viral capsid integrity and genome.
- Further research is needed to elucidate the precise mechanism of CuO NP anti-rotavirus action.
Abstract:
Group A rotaviruses are the most common cause of gastroenteritis in children under five years of age worldwide. Rotavirus gastroenteritis can be related to mild to severe diarrhea in children and in some cases, can lead to death due to severe dehydration. Approximately 146,480 people die annually from rotavirus infection worldwide, and most of these deaths occur in low-income countries in Africa and Asia. Since there are no specific effective drugs to treat rotavirus infections, and infected patients can only be treated supportively, new antiviral agents need to be developed. Copper oxide nanoparticles (CuO NPs) have a wide range of applications in the magnetic and electrical industries, as well as in biology. The antiviral activity of nanoparticles (CuO NPs) is well documented. This study aimed to investigate the antiviral effect of CuO NPs on rotaviruses. The cytotoxic effects of CuO NPs on MA-104 cells were examined by methyl thiazolyl tetrazolium assay. In addition, the anti-rotavirus activity of CuO NPs was evaluated by TCID50 and real-time polymerase chain reaction PCR assay. Our results showed that exposure of rotavirus-infected cells to various non-toxic concentrations of CuO NPs did not cause a decrease in viral titer, compared to the control. However, the virucidal effect of CuO NPs on rotavirus was observed at concentrations of 80 and 100 μg/ml (P<0.001). Our study suggested that CuO NPs had significant antiviral activity against rotavirus replication. However, the exact mechanism of anti-rotavirus activity of CuO NPs remained unknown. According to the virucidal assay, it appears that the loss of capsid integrity and genome disruption in the presence of CuO NPs are possible mechanisms of its anti-rotavirus activity.
