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Xu J, Zhang Y, Zhu X, Ling G, Zhang P. Two-mode sensing strategies based on tunable cobalt metal organic framework active sites to detect Hg 2. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133424. [PMID: 38185088 DOI: 10.1016/j.jhazmat.2024.133424] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/20/2023] [Accepted: 01/01/2024] [Indexed: 01/09/2024]
Abstract
Heavy metal pollution poses a major threat to human health, and developing a user-deliverable heavy metal detection strategy remains a major challenge. In this work, two-mode Hg2+ sensing platforms based on the tunable cobalt metal-organic framework (Co-MOF) active site strategy are constructed, including a colorimetric, and an electrochemical assay using a personal glucose meter (PGM) as the terminal device. Specifically, thymine (T), a single, adaptable nucleotide, is chosen to replace typical T-rich DNA aptamers. The catalytic sites of Co-MOF are tuned competitively by the specific binding of T-Hg2+-T, and different signal output platforms are developed based on the different enzyme-like activities of Co-MOF. DFT calculations are utilized to analyze the interaction mechanism between T and Co-MOF with defect structure. Notably, the two-mode sensing platforms exhibit outstanding detection performance, with LOD values as low as 0.5 nM (colorimetric) and 3.69 nM (PGM), respectively, superior to recently reported nanozyme-based Hg2+ sensors. In real samples of tap water and lake water, this approach demonstrates an effective recovery rate and outstanding selectivity. Surprisingly, the method is potentially versatile and, by exchanging out T-Hg2+-T, can also detect Ag+. This simple, portable, and user-friendly Hg2+ detection approach shows plenty of promise for application in the future.
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Affiliation(s)
- Jiaqi Xu
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Yuanke Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Xiaoguang Zhu
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Guixia Ling
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China.
| | - Peng Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China.
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Jeung JH, Han H, Lee CY, Ahn JK. CRISPR/Cas12a Collateral Cleavage Activity for Sensitive 3'-5' Exonuclease Assay. BIOSENSORS 2023; 13:963. [PMID: 37998138 PMCID: PMC10669037 DOI: 10.3390/bios13110963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/20/2023] [Accepted: 10/27/2023] [Indexed: 11/25/2023]
Abstract
This study presents a technique for detecting 3'-5' exonuclease activity through the use of CRISPR/Cas12a. These enzymes, including 3'-5' exonuclease (Exo III), perform crucial roles in various cellular processes and are associated with life expectancy. However, imbalances in their expression can increase susceptibility to diseases such as cancer, particularly under prolonged stress. In this study, an activator sequence of CRISPR/Cas12a was constructed on the 5'-end of a hairpin probe (HP), forming a blunt end. When the 3'-end of the HP was hydrolyzed with Exo III activity, the activator sequence of Cas12a was exposed, which led to collateral cleavage of the DNA signal probe and generated a fluorescent signal, allowing sensitive and highly specific Exo III detection. This detection principle relied on the fact that Exo III exclusively cleaves the 3'-end mononucleotide of dsDNA and does not affect ssDNA. Based on this strategy, Exo III activity was successfully assayed at 0.0073 U/mL, demonstrating high sensitivity. In addition, this technique was used to screen candidate inhibitors of Exo III activity.
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Affiliation(s)
- Jae Hoon Jeung
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Republic of Korea; (J.H.J.); (H.H.)
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Hyogu Han
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Republic of Korea; (J.H.J.); (H.H.)
- Department of Chemistry, Gangneung–Wonju National University, Gangneung 25457, Republic of Korea
| | - Chang Yeol Lee
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak–ro, Yuseong–gu, Daejeon 34141, Republic of Korea
| | - Jun Ki Ahn
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan 15588, Republic of Korea; (J.H.J.); (H.H.)
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Gao F, Chang Y, Zhang J, Wang L, Liu L. Stimuli-responsive aggregation-induced emission of molecular probes by electrostatic and hydrophobic interactions: Effect of organic solvent content and application for probing of alkaline phosphatase activity. Talanta 2023; 265:124923. [PMID: 37433248 DOI: 10.1016/j.talanta.2023.124923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 07/01/2023] [Accepted: 07/06/2023] [Indexed: 07/13/2023]
Abstract
We suggest that aggregation-induced emission (AIE) molecular probes with single charged/reactive group can exist in the formation of nanostructures but not monomers at extremely low organic solvent content. The nanoaggregates show good dispersivity and emit week emission. Stimuli-responsive assembly of nanoaggregates by electrostatic interactions can turn on the fluorescence, facilitating the design of biosensors with single-charged molecular probes as the AIE fluorogens. To prove the concept, tetraphenylethene-substituted pyridinium salt (TPE-Py) was used as the AIE fluorogen for probing of alkaline phosphatase (ALP) activity with pyrophosphate ion (PPi) as the enzyme substrate. The dynamic light scattering and transmission electron microscope experiments demonstrated that TPE-Py probes existed in aqueous solution at nanometer size and morphology. Stimuli such as the negatively charged PPi, citrate, ATP, ADP, NADP and DNA could trigger the aggregation of the positively charged TPE-Py nanoparticles, thus enhancing the fluorescence via AIE effect. ALP-enzymatic hydrolysis of PPi into two phosphate ions (Pi) limited the aggregation of TPE-Py nanoparticles. The strategy was used for the assay of ALP with a low detection limit (1 U/L) and wide linear range (1-200 U/L). We also investigated the effect of organic solvent content on the AIE process and found that high concentration of organic solvent can prevent the hydrophobic interaction between AIE molecules but show no essential influence on the electrostatic interaction-mediated assembly. The work should be evaluable for understanding AIE phenomenon and developing novel, simple and sensitive biosensors using a molecular probe with single charged/reactive group as the signal reporter.
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Affiliation(s)
- Fengli Gao
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, 455000, PR China
| | - Yong Chang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, 455000, PR China; School of Chemistry and Materials Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, PR China
| | - Jingyi Zhang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, 455000, PR China
| | - Lingli Wang
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, 455000, PR China
| | - Lin Liu
- College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, 455000, PR China.
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Park J, Han H, Jeung JH, Jang H, Park C, Ahn JK. CRISPR/Cas13a-assisted AMP generation for SARS-CoV-2 RNA detection using a personal glucose meter. BIOSENSORS & BIOELECTRONICS: X 2022; 12:100283. [PMID: 36405495 PMCID: PMC9659363 DOI: 10.1016/j.biosx.2022.100283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/27/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
Herein, we described a washing- and label-free clustered regularly interspaced short palindromic repeats (CRISPR)/LwaCas13a-based RNA detection method utilizing a personal glucose meter (PGM), which relies on the trans-cleavage activity of CRISPR/Cas13a and kinase reactions. In principle, the presence of target RNA activates the trans-cleavage of CRISPR/Cas13a, generating 2',3'-cyclic phosphate adenosine, which is converted to adenosine monophosphate (AMP) by the T4 polynucleotide kinase. Subsequently, the AMP is converted to adenosine diphosphate (ADP) through phosphorylation by a myokinase; ADP is then used as a substrate in the cascade enzymatic reaction promoted by pyruvate kinase and hexokinase. The overall reaction leads to the continuous conversion of glucose to glucose-6-phosphate, resulting in a reduction of glucose concentration proportional to the level of target RNA, which can therefore be indirectly measured with a PGM. By employing this novel strategy, severe acute respiratory syndrome coronavirus-2 RNA can be successfully detected with excellent specificity. In addition, we were able to overcome non-specific responses of CRISPR/Cas13a and distinguish single nucleotide polymorphisms by introducing a single-base mismatch in the complementary RNA. Our study provides an alternative coronavirus disease 2019 detection technology that is affordable, accessible, and portable with a fast turnaround time and excellent selectivity.
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Affiliation(s)
- Junhyun Park
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan, 15588, South Korea
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, South Korea
| | - Hyogu Han
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan, 15588, South Korea
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, 25457, South Korea
| | - Jae Hoon Jeung
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan, 15588, South Korea
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, South Korea
| | - Hyowon Jang
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan, 15588, South Korea
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon, 34141, South Korea
| | - Chihyun Park
- Daejeon District Office, National Forensic Service, Daejeon, 34054, South Korea
| | - Jun Ki Ahn
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansan, 15588, South Korea
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