Qin, Dapeng and Gong, Qiuping and Li, Xin and Gao, Yanping and Gopinath, Subash C. B. and Chen, Yeng and Yang, Zehua (2023) Identification of Mycoplasma pneumoniae by DNA-modified gold nanomaterials in a colorimetric assay. Biotechnology and Applied Biochemistry, 70 (2). pp. 553-559. ISSN 0885-4513, DOI https://doi.org/10.1002/bab.2377.
Full text not available from this repository.Abstract
Mycoplasma pneumoniae is a highly infectious bacterium and the major cause of pneumonia especially in school-going children. Mycoplasma pneumoniae affects the respiratory tract, and 25% of patients experience health-related problems. It is important to have a suitable method to detect M. pneumoniae, and gold nanoparticle (GNP)-based colorimetric biosensing was used in this study to identify the specific target DNA for M. pneumoniae. The color of GNPs changes due to negatively charged GNPs in the presence of positively charged monovalent (Na+) ions from NaCl. This condition is reversed in the presence of a single-stranded oligonucleotide, as it attracts GNPs but not in the presence of double-stranded DNA. Single standard capture DNA was mixed with optimal target DNA that cannot be adsorbed by GNPs; under this condition, GNPs are not stabilized and aggregate at high ionic strength (from 100 mM). Without capture DNA, the GNPs that were stabilized by capture DNA (from 1 mu M) became more stable under high ionic conditions and retaining their red color. The GNPs turned blue in the presence of target DNA at concentrations of 1 pM, and the GNPs retained a red color when there was no target in the solution. This method is useful for the simple, easy, and accurate identification of M. pneumoniae target DNA at higher discrimination and without involving sophisticated equipment, and this method provides a diagnostic for M. pneumoniae.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Colorimetry; DNA sensor; Gold nanoparticle; Mycoplasma infection |
| Subjects: | R Medicine R Medicine > RK Dentistry R Medicine > RK Dentistry > Oral surgery |
| Divisions: | Faculty of Dentistry Faculty of Dentistry > Department of Oral & Craniofacial Sciences |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 30 Oct 2024 08:26 |
| Last Modified: | 30 Oct 2024 08:26 |
| URI: | http://eprints.um.edu.my/id/eprint/39509 |
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