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Malla SR, Gujjari A, Corona CE, Beall GW, Lewis LK. Spectrophotometric and nucleic acid-binding properties of halloysite clay nanotubes and kaolinite. Heliyon 2023; 9:e13009. [PMID: 36699281 PMCID: PMC9868539 DOI: 10.1016/j.heliyon.2023.e13009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/09/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
Halloysite particles (HNTs) are naturally occurring aluminosilicate nanotubes of low toxicity that have shown great promise for drug and biomolecule delivery into human and animal cells. Kaolinite particles retain the same layered structure as HNT, but do not form nanotubes. In this study, the spectrophotometric and sedimentation properties of the two clays in aqueous solutions and their abilities to associate with both small and large nucleic acids have been investigated. Both clays scattered ultraviolet light strongly and this characteristic of HNT was not affected by either vacuum treatment to remove trapped gases or by sonication. Vacuum treatment increased the binding of small nucleic acids to HNT and this association was further enhanced by addition of divalent metal ions. By contrast, only small RNAs were bound efficiently by kaolinite in the presence of Mg2+ ions. Large linear double-stranded DNAs and circular plasmid DNAs bound poorly to kaolinite under all conditions, but these nucleic acids could form strong associations with HNT. Differences in binding data were largely consistent with measurements of the available surface areas of each clay. These results demonstrate that interactions with each clay are critically dependent on both the type and the conformation of each nucleic acid.
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Affiliation(s)
- Shubha R.L. Malla
- Materials Science, Engineering and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Archana Gujjari
- Materials Science, Engineering and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Carlos E. Corona
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - Gary W. Beall
- Materials Science, Engineering and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA,Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA
| | - L. Kevin Lewis
- Materials Science, Engineering and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA,Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA,Corresponding author. Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, TX, 78666, USA.
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Abstract
A fast, automated and accurate millidevice for determination of the apparent solubility of proteins and impurities and different industrially relevant precipitating agents.
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Affiliation(s)
- Maria del Carme Pons Royo
- Department of Innovation, Novasep, 81 Boulevard de la Moselle, 54340 Pompey, France
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
- Austrian Centre of Industrial Biotechnology (ACIB), Muthgasse 18, 1190 Vienna, Austria
| | - Jean-Luc Beulay
- Department of Innovation, Novasep, 81 Boulevard de la Moselle, 54340 Pompey, France
| | - Eric Valery
- Department of Innovation, Novasep, 81 Boulevard de la Moselle, 54340 Pompey, France
| | - Alois Jungbauer
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
- Austrian Centre of Industrial Biotechnology (ACIB), Muthgasse 18, 1190 Vienna, Austria
| | - Peter Satzer
- Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria
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