{"title":"Ratiometric Detection of Zn<sup>2+</sup> Using DNAzyme-Based Bioluminescence Resonance Energy Transfer Sensors.","authors":"Yuting Wu, Whitney Lewis, Jing Luen Wai, Mengyi Xiong, Jiao Zheng, Zhenglin Yang, Chloe Gordon, Ying Lu, Siu Yee New, Xiao-Bing Zhang, Yi Lu","doi":"10.3390/chemistry5030119","DOIUrl":null,"url":null,"abstract":"<p><p>While fluorescent sensors have been developed for monitoring metal ions in health and diseases, they are limited by the requirement of an excitation light source that can lead to photobleaching and a high autofluorescence background. To address these issues, bioluminescence resonance energy transfer (BRET)-based protein or small molecule sensors have been developed; however, most of them are not highly selective nor generalizable to different metal ions. Taking advantage of the high selectivity and generalizability of DNAzymes, we report herein DNAzyme-based ratiometric sensors for Zn<sup>2+</sup> based on BRET. The 8-17 DNAzyme was labeled with luciferase and Cy3. The proximity between luciferase and Cy3 permiQed BRET when coelenterazine, the substrate for luciferase, was introduced. Adding samples containing Zn<sup>2+</sup> resulted in a cleavage of the substrate strand, causing dehybridization of the DNAzyme construct, thus increasing the distance between Cy3 and luciferase and changing the BRET signals. Using these sensors, we detected Zn<sup>2+</sup> in serum samples and achieved Zn<sup>2+</sup> detection with a smartphone camera. Moreover, since the BRET pair is not the component that determines the selectivity of the sensors, this sensing platform has the potential to be adapted for the detection of other metal ions with other metal-dependent DNAzymes.</p>","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10874629/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precision Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/chemistry5030119","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/8/8 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
While fluorescent sensors have been developed for monitoring metal ions in health and diseases, they are limited by the requirement of an excitation light source that can lead to photobleaching and a high autofluorescence background. To address these issues, bioluminescence resonance energy transfer (BRET)-based protein or small molecule sensors have been developed; however, most of them are not highly selective nor generalizable to different metal ions. Taking advantage of the high selectivity and generalizability of DNAzymes, we report herein DNAzyme-based ratiometric sensors for Zn2+ based on BRET. The 8-17 DNAzyme was labeled with luciferase and Cy3. The proximity between luciferase and Cy3 permiQed BRET when coelenterazine, the substrate for luciferase, was introduced. Adding samples containing Zn2+ resulted in a cleavage of the substrate strand, causing dehybridization of the DNAzyme construct, thus increasing the distance between Cy3 and luciferase and changing the BRET signals. Using these sensors, we detected Zn2+ in serum samples and achieved Zn2+ detection with a smartphone camera. Moreover, since the BRET pair is not the component that determines the selectivity of the sensors, this sensing platform has the potential to be adapted for the detection of other metal ions with other metal-dependent DNAzymes.
期刊介绍:
Chemical research focused on precision enables more controllable predictable and accurate outcomes which in turn drive innovation in measurement science sustainable materials information materials personalized medicines energy environmental science and countless other fields requiring chemical insights.Precision Chemistry provides a unique and highly focused publishing venue for fundamental applied and interdisciplinary research aiming to achieve precision calculation design synthesis manipulation measurement and manufacturing. It is committed to bringing together researchers from across the chemical sciences and the related scientific areas to showcase original research and critical reviews of exceptional quality significance and interest to the broad chemistry and scientific community.