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Zhou C, Zhao Y, Guo B, Yang M, Xu Q, Lei C, Wang H. Establishment of a Simple, Sensitive, and Specific Salmonella Detection Method Based on Recombinase-Aided Amplification Combined with dsDNA-Specific Nucleases. Foods 2024; 13:1380. [PMID: 38731750 PMCID: PMC11083397 DOI: 10.3390/foods13091380] [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: 04/01/2024] [Revised: 04/22/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Salmonella is a common foodborne pathogen that can cause food poisoning, posing a serious threat to human health. Therefore, quickly, sensitively, and accurately detecting Salmonella is crucial to ensuring food safety. For the Salmonella hilA gene, we designed Recombinase-aided amplification (RAA) primers and dsDNA-specific nuclease (DNase) probes. The ideal primer and probe combination was found when conditions were optimized. Under UV light, a visual Salmonella detection technique (RAA-dsDNase) was developed. Additionally, the RAA-dsDNase was modified to further reduce pollution hazards and simplify operations. One-pot RAA-dsDNase-UV or one-pot RAA-dsDNase-LFD was developed as a Salmonella detection method, using UV or a lateral flow dipstick (LFD) for result observation. Among them, one-pot RAA-dsDNase and one-pot RAA-dsDNase-LFD had detection times of 50 min and 60 min, respectively, for detecting Salmonella genomic DNA. One-pot RAA-dsDNase-UV had a detection limit of 101 copies/μL and 101 CFU/mL, while one-pot RAA-dsDNase-LFD had a sensitivity of 102 copies/μL and 102 CFU/mL. One-pot RAA-dsDNase-UV and one-pot RAA-dsDNase-LFD assays may identify 17 specific Salmonella serovars witho ut causing a cross-reaction with the remaining 8 bacteria, which include E. coli. Furthermore, Salmonella in tissue and milk samples has been reliably detected using both approaches. Overall, the detection method developed in this study can quickly, sensitively, and accurately detect Salmonella, and it is expected to become an important detection tool for the prevention and control of Salmonella in the future.
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Affiliation(s)
- Changyu Zhou
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Yu Zhao
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Boyan Guo
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Ming Yang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Qiang Xu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Changwei Lei
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
| | - Hongning Wang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610017, China; (C.Z.); (Y.Z.); (B.G.)
- Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu 610064, China
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Tran JR, Zheng X, Adam SA, Goldman RD, Zheng Y. High quality mapping of chromatin at or near the nuclear lamina from small numbers of cells reveals cell cycle and developmental changes of chromatin at the nuclear periphery. Nucleic Acids Res 2022; 50:e117. [PMID: 36130229 PMCID: PMC9723609 DOI: 10.1093/nar/gkac762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 07/28/2022] [Accepted: 09/16/2022] [Indexed: 12/24/2022] Open
Abstract
The chromatin associated with the nuclear lamina (NL) is referred to as lamina-associated domains (LADs). Here, we present an adaptation of the tyramide-signal amplification sequencing (TSA-seq) protocol, which we call chromatin pull down-based TSA-seq (cTSA-seq), that can be used to map chromatin regions at or near the NL from as little as 50 000 cells. The cTSA-seq mapped regions are composed of previously defined LADs and smaller chromatin regions that fall within the Hi-C defined B-compartment containing nuclear peripheral heterochromatin. We used cTSA-seq to map chromatin at or near the assembling NL in cultured cells progressing through early G1. cTSA-seq revealed that the distal ends of chromosomes are near or at the reassembling NL during early G1, a feature similar to those found in senescent cells. We expand the use of cTSA-seq to the mapping of chromatin at or near the NL from fixed-frozen mouse cerebellar tissue sections. This mapping reveals a general conservation of NL-associated chromatin and identifies global and local changes during cerebellar development. The cTSA-seq method reported here is useful for analyzing chromatin at or near the NL from small numbers of cells derived from both in vitro and in vivo sources.
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Affiliation(s)
- Joseph R Tran
- Correspondence may also be addressed to Joseph R. Tran. Tel: +1 410 246 3032; Fax: +1 410 243 6311;
| | - Xiaobin Zheng
- Department of Embryology, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Stephen A Adam
- Department of Cell and Developmental Biology, Northwestern University, Feinberg School of Medicine, Ward Building 11-145, 303 E. Chicago Ave. Chicago, IL 60611, USA
| | - Robert D Goldman
- Department of Cell and Developmental Biology, Northwestern University, Feinberg School of Medicine, Ward Building 11-145, 303 E. Chicago Ave. Chicago, IL 60611, USA
| | - Yixian Zheng
- To whom correspondence should be addressed. Tel: +1 410 246 3032; Fax: +1 410 243 6311;
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