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Wang P, Liang L, Peng X, Qu T, Zhao X, Ji Q, Chen Y. Sodium Deoxycholate-Propidium Monoazide Droplet Digital PCR for Rapid and Quantitative Detection of Viable Lacticaseibacillus rhamnosus HN001 in Compound Probiotic Products. Microorganisms 2024; 12:1504. [PMID: 39203347 PMCID: PMC11356422 DOI: 10.3390/microorganisms12081504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 07/15/2024] [Accepted: 07/18/2024] [Indexed: 09/03/2024] Open
Abstract
As a famous probiotic, Lacticaseibacillus rhamnosus HN001 is widely added to probiotic products. Different L. rhamnosus strains have different probiotic effects, and the active HN001 strain is the key to exerting probiotic effects, so it is of great practical significance for realising the detection of L. rhamnosus HN001 at the strain level in probiotic products. In this study, strain-specific primer pairs and probes were designed. A combined treatment of sodium deoxycholate (SD) and propidium monoazide (PMA) inhibited the amplification of dead bacterial DNA, establishing a SD-PMA-ddPCR system and conditions for detecting live L. rhamnosus HN001 in probiotic powders. Specificity was confirmed using type strains and commercial strains. Sensitivity tests with spiked samples showed a detection limit of 10⁵ CFU/g and a linear quantification range of 1.42 × 10⁵-1.42 × 10⁹ CFU/g. Actual sample testing demonstrated the method's efficiency in quantifying HN001 in compound probiotic products. This method offers a reliable tool for the rapid and precise quantification of viable L. rhamnosus HN001, crucial for the quality monitoring of probiotic products.
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Affiliation(s)
- Ping Wang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
| | - Lijiao Liang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xinkai Peng
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
- College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China
| | - Tianming Qu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
| | - Xiaomei Zhao
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
| | - Qinglong Ji
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
| | - Ying Chen
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (P.W.); (L.L.); (X.P.); (T.Q.); (X.Z.); (Q.J.)
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Li B, Xie X, Meng T, Guo X, Li Q, Yang Y, Jin H, Jin C, Meng X, Pang H. Recent advance of nanomaterials modified electrochemical sensors in the detection of heavy metal ions in food and water. Food Chem 2024; 440:138213. [PMID: 38134834 DOI: 10.1016/j.foodchem.2023.138213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
As one of the main pollutants, heavy metal ions can accumulate in the human body and cause a cascade of damage. Electrochemical sensors provide great prospects for tracing heavy metal ions because of their properties of high sensitivity, low detection limits and fast response. Electrode surface modification materials play a key role in enhancing the performance of electrochemical sensors. Herein, we summarize in detail the recent work on electrochemical sensors modified by carbon nanomaterials (graphene and its derivatives, carbon nanofibers and carbon nanotubes), metal nanomaterials (gold, silver, bismuth and iron), complexes (MOFs, ZIFs and MXenes) and their composites for the detection of heavy metal ions (mainly include Cd(II), Hg(II), Pb(II), As(III), Cu(II) and Zn(II)) in food and water. The synthetic strategies, mechanisms, innovations, advantages, challenges and prospects of various electrode modification nanomaterials for the detection of heavy metal ions in food and water are discussed.
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Affiliation(s)
- Bing Li
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China; College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, PR China.
| | - Xiaomei Xie
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Tonghui Meng
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Xiaotian Guo
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Qingzheng Li
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Yuting Yang
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Haixia Jin
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China
| | - Changhai Jin
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, PR China
| | - Xiangren Meng
- College of Tourism and Culinary Science, Yangzhou University, Jiangsu 225127, PR China.
| | - Huan Pang
- College of Chemistry and Chemical Engineering, Yangzhou University, Jiangsu, 225002, PR China.
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Di Masi S, De Benedetto GE, Malitesta C. Optimisation of electrochemical sensors based on molecularly imprinted polymers: from OFAT to machine learning. Anal Bioanal Chem 2024; 416:2261-2275. [PMID: 38117322 DOI: 10.1007/s00216-023-05085-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/21/2023]
Abstract
Molecularly imprinted polymers (MIPs) rely on synthetic engineered materials able to selectively bind and intimately recognise a target molecule through its size and functionalities. The way in which MIPs interact with their targets, and the magnitude of this interaction, is closely linked to the chemical properties derived during the polymerisation stages, which tailor them to their specific target. Hence, MIPs are in-deep studied in terms of their sensitivity and cross-reactivity, further being used for monitoring purposes of analytes in complex analytical samples. As MIPs are involved in sensor development within different approaches, a systematic optimisation and rational data-driven sensing is fundamental to obtaining a best-performant MIP sensor. In addition, the closer integration of MIPs in sensor development requires that the inner properties of the materials in terms of sensitivity and selectivity are maintained in the presence of competitive molecules, which focus is currently opened. Identifying computational models capable of predicting and reporting the best-performant configuration of electrochemical sensors based on MIPs is of immense importance. The application of chemometrics using design of experiments (DoE) is nowadays increasingly adopted during optimisation problems, which largely reduce the number of experimental trials. These approaches, together with the emergent machine learning (ML) tool in sensor data processing, represent the future trend in design and management of point-of-care configurations based on MIP sensing. This review provides an overview on the recent application of chemometrics tools in optimisation problems during development and analytical assessment of electrochemical sensors based on MIP receptors. A comprehensive discussion is first presented to cover the recent advancements on response surface methodologies (RSM) in optimisation studies of MIPs design. Therefore, the recent advent of machine learning in sensor data processing will be focused on MIPs development and analytical detection in sensors.
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Affiliation(s)
- Sabrina Di Masi
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Lecce, Italy
| | - Giuseppe Egidio De Benedetto
- Laboratorio di Spettrometria di Massa Analitica e Isotopica, Dipartimento di Beni Culturali, Università del Salento, Lecce, Italy
| | - Cosimino Malitesta
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Lecce, Italy.
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