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Wan F, Chen ZW, Xu TT, Guan JJ, Cui XM, Kang CZ, Zhou T, Wang CX, Guo LP, Yang Y. Selection and application of aptamers for p-hydroxybenzyl hydrogen sulfite after Gastrodia elata Bl. fumigated with sulfur. Talanta 2024; 269:125461. [PMID: 38056416 DOI: 10.1016/j.talanta.2023.125461] [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: 04/25/2023] [Revised: 10/01/2023] [Accepted: 11/20/2023] [Indexed: 12/08/2023]
Abstract
Gastrodia elata Bl. is a widely used traditional Chinese medicine known for its medicinal properties. However, during the drying process, G. elata is often fumigated with sulfur to prevent corrosion and improve its appearance. Sulfur-fumigation can result in a reduction in the effective components of the herb and can also be hazardous to human health due to the remaining sulfur dioxide. Sulfur-fumigation of G. elata poses a significant challenge to both end-users and researchers. The detection of p-hydroxybenzyl hydrogen sulfite (p-HS) is a useful tool in determining whether G. elata has been fumigated with sulfur. Unfortunately, the current method for detecting p-HS is costly and requires sophisticated instruments. Therefore, there is a need to develop a more cost-effective and user-friendly method for the detection of p-HS. This study utilized the Capture-SELEX technique to screen high-affinity aptamers for p-HS, which were subsequently characterized by isothermal titration calorimetry (ITC). An aptamer sequence (seq 6) with a high affinity of Kd = 26.5 μM was obtained following 8 rounds of selection against p-HS. With the aptamer serving as the recognition element and gold nanoparticles as the colorimetric indicator, a simple and efficient colorimetric sensor was developed for the specific detection of p-HS. This detection method exhibited a limit of detection of 1 μg/ml, while the p-HS recoveries demonstrated a range of between 88.5 % and 105 % for samples of G. elata obtained in the market. In summary, the aptamer exhibited a high affinity for p-HS, and the sensor developed through the use of a colloidal gold detector based on nucleic acid aptamer can be utilized for rapid detection of sulfur-fumigated G. elata. With these findings, this research paper provides valuable scientific insights and highlights significant potential for future studies in this area.
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Affiliation(s)
- Fen Wan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Zhuo-Wen Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Ting-Ting Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Jin-Jie Guan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China
| | - Xiu-Ming Cui
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China
| | - Chuan-Zhi Kang
- China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Tao Zhou
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Cheng-Xiao Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China
| | - Lan-Ping Guo
- China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Ye Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; Yunnan Provincial Key Laboratory of Panax Notoginseng, Kunming, 650500, China.
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