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Updated: Oct 24, 2025
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Methods for Analyzing the Impacts of Natural Uranium on In Vitro Osteoclastogenesis
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Cupriavidus metallidurans NA4 actively forms polyhydroxybutyrate-associated uranium-phosphate precipitates
Tom Rogiers1, Mohamed L Merroun2, Adam Williamson3
1Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium; Center for Microbial Ecology and Technology (CMET), UGent, Ghent, Belgium.
Journal of Hazardous Materials
|August 14, 2021
Summary
Cupriavidus metallidurans NA4 efficiently removes uranium, forming intracellular precipitates. This bacterium shows a complex stress response, suggesting potential for uranium bioremediation.
Area of Science:
- Microbiology
- Environmental Science
- Biotechnology
Background:
- Cupriavidus metallidurans is a well-studied bacterium for metal resistance.
- Its mechanisms for radionuclide resistance, particularly uranium, remain largely unknown.
- Bioremediation applications for metals are established, but radionuclide remediation is unexplored.
Purpose of the Study:
- To investigate the interaction of Cupriavidus metallidurans NA4 with uranium.
- To understand the cellular response of this bacterium to uranium exposure.
- To assess the potential of C. metallidurans NA4 for uranium bioremediation.
Main Methods:
- Bacterial culture with uranyl nitrate.
- Uranium quantification in biomass.
- Transmission Electron Microscopy with Energy-Dispersive X-ray spectroscopy (TEM HAADF-EDX).
- Whole transcriptome sequencing.
Main Results:
- Strain NA4 captured 98% of uranium within 24 hours.
- Intracellular uranium-phosphate precipitates were observed, associated with polyhydroxybutyrate.
- Transcriptome analysis revealed upregulation of stress and metal resistance genes, including copper and silver resistance clusters.
Conclusions:
- Cupriavidus metallidurans NA4 actively interacts with and accumulates uranium.
- The bacterium exhibits a complex stress response involving known metal resistance pathways.
- These findings highlight the potential of C. metallidurans NA4 for uranium bioremediation.
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