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Ma YH, Liu Y, Li T, Xu ZQ, Chai JJ, Liu A, Ma QH, Gao LJ, Li MC. An experimental study on the visual identification of Fritillaria ussuriensis based on LAMP and nucleic acid colloidal gold technique. Anal Biochem 2024; 687:115430. [PMID: 38147947 DOI: 10.1016/j.ab.2023.115430] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/28/2023]
Abstract
Fritillaria ussuriensis Maxim is one of the traditional Chinese valuable herbs, which is the dried bulb of Fritillaria, a plant of the lily family. The identification of authenticity about F. ussuriensis is still technically challenging. In this study, visual identification was performed by ring-mediated isothermal amplification and nucleic acid colloidal gold techniques. Firstly, multiple sequence comparative analysis was performed by DNAMAN to find the differential sites of F. ussuriensis and its mixed pseudo-products, and the specific identification primers of F. ussuriensis were designed. Genomic DNA was extracted by the modified CTAB method, and the reaction system and reaction conditions were optimized to construct LAMP for the visual detection of F. ussuriensis, meanwhile, the genuine product was cloned and the extracted plasmid was sequenced. The specificity and sensitivity were detected, and also verified by nucleic acid colloidal gold method, and 20 commercially available samples were tested. The extracted DNA met the requirements of the experiment, and the genuine F. ussuriensis PCR product titrated on a test strip showed two bands on the T and C lines, while the counterfeit and negative control showed only one band on the C line, which matched the LAMP results. The specificity was 100 %, and the sensitivity of LAMP assay was up to 0.01 ng μL-1, while that of colloidal gold assay was 0.1 ng μL-1, thus the LAMP assay had high sensitivity. 14 out of 20 commercially available samples of F. ussuriensis were qualified, and 6 were unqualified, and the results of the two methods of identification were consistent. In this study, the combined detection method of LAMP and colloidal gold for nucleic acid was established to be specific, rapid, precise and visualized, which can provide a new technical idea for the detection of F. ussuriensis.
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Affiliation(s)
- Yu-He Ma
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Yue Liu
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Tao Li
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Zi-Qiang Xu
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Jin-Jun Chai
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Ang Liu
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Qiu-He Ma
- School of Medical Technology, Beihua University, Jilin, 132013, China
| | - Li-Jun Gao
- School of Medical Technology, Beihua University, Jilin, 132013, China.
| | - Ming-Cheng Li
- School of Medical Technology, Beihua University, Jilin, 132013, China; Innovation Center for Detection on DNA Fingerprint of Traditional Chinese Medicine, Jilin, 132013, China
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