1
|
Wang R, Gong M, Liu Y, Zhu W, Zhang K, Zhao Y, Yin C, Liu Y, Wang J, Wan Y. Development of a highly sensitive colloidal gold semiquantitative method for the determination of difenoconazole residues in citrus. Front Nutr 2024; 11:1341219. [PMID: 38590829 PMCID: PMC10999568 DOI: 10.3389/fnut.2024.1341219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/28/2024] [Indexed: 04/10/2024] Open
Abstract
Introduction Difenoconazole (DIFE) is a common pesticide used in citrus cultivation; excessive intake can cause neurological damage to the organism, and the existing colloidal gold immunochromatographic test strips cannot meet the requirements for the detection of citrus samples. Methods Difenoconazole test strip was prepared based on the colloidal gold immunochromatographic technique (GICT), and its application in citrus samples was investigated; with colloidal gold (CG) as the probe, the optimization of GICT parameters, and the determination of reaction method, the immunochromatographic test strips for the detection of DIFE in citrus was developed, and the limit of detection (LOD), specificity, accuracy, and stability of the test strips were verified. Results The results showed that the visual detection limit of the prepared colloidal gold immunochromatographic test strips was 0.2 mg/kg and the quantitative range was 0.06-0.6 mg/kg, and the test strips could specifically identify DIFE and have no cross-reaction with other common triazole pesticides. The detection method established in this study was verified by the GC-MS method, and the detection results achieved good consistency (R2 > 0.98). Conclusion The test strips developed in this study have good performance and can be used for highly sensitive detection of citrus samples.
Collapse
Affiliation(s)
- Ruobing Wang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Min Gong
- Hainan Inspection and Detection Center of Modern Agriculture, Haikou, Hainan, China
| | - Yang Liu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Weiran Zhu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Kai Zhang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yidi Zhao
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Chen Yin
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yuan Liu
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Jian Wang
- Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-Products and Food, Hebei North University, Zhangjiakou, Hebei, China
| | - Yuping Wan
- Beijing Kwinbon Technology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| |
Collapse
|
2
|
Cheng L, Lan L, Ramalingam M, He J, Yang Y, Gao M, Shi Z. A review of current effective COVID-19 testing methods and quality control. Arch Microbiol 2023; 205:239. [PMID: 37195393 DOI: 10.1007/s00203-023-03579-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 05/04/2023] [Accepted: 05/04/2023] [Indexed: 05/18/2023]
Abstract
COVID-19 is a highly infectious disease caused by the SARS-CoV-2 virus, which primarily affects the respiratory system and can lead to severe illness. The virus is extremely contagious, early and accurate diagnosis of SARS-CoV-2 is crucial to contain its spread, to provide prompt treatment, and to prevent complications. Currently, the reverse transcriptase polymerase chain reaction (RT-PCR) is considered to be the gold standard for detecting COVID-19 in its early stages. In addition, loop-mediated isothermal amplification (LMAP), clustering rule interval short palindromic repeats (CRISPR), colloidal gold immunochromatographic assay (GICA), computed tomography (CT), and electrochemical sensors are also common tests. However, these different methods vary greatly in terms of their detection efficiency, specificity, accuracy, sensitivity, cost, and throughput. Besides, most of the current detection methods are conducted in central hospitals and laboratories, which is a great challenge for remote and underdeveloped areas. Therefore, it is essential to review the advantages and disadvantages of different COVID-19 detection methods, as well as the technology that can enhance detection efficiency and improve detection quality in greater details.
Collapse
Affiliation(s)
- Lijia Cheng
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China.
| | - Liang Lan
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China
| | - Murugan Ramalingam
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China
| | - Jianrong He
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China
| | - Yimin Yang
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China
| | - Min Gao
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China
| | - Zheng Shi
- Clinical Medical College & Affiliated Hospital, School of Basic Medical Sciences, Chengdu University, Chengdu, 610106, China.
| |
Collapse
|
3
|
Cai MJ, Lin J, Zhu JH, Dai Z, Lin YQ, Liang XM. Unspecific reactivity must be excluded in COVID-19 epidemiological analyses or virus tracing based on serologic testing: Analysis of 46,777 post-pandemic samples and 1,114 pre-pandemic samples. Front Med (Lausanne) 2022; 9:1018578. [DOI: 10.3389/fmed.2022.1018578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/31/2022] [Indexed: 11/17/2022] Open
Abstract
BackgroundSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of coronavirus disease 2019 (COVID-19). Serologic testing is complementary to nucleic acid screening to identify SARS-CoV-2. This study aimed to evaluate unspecific reactivity in SARS-CoV-2 serologic tests.Materials and methodsTotal anti-SARS-CoV-2 antibodies from 46,777 subjects who were screened for SARS-CoV-2 were retrospectively studied to evaluate the incidence and characteristics of the unspecific reactivity. A total of 1,114 pre-pandemic samples were also analysed to compare unspecific reactivity.ResultsThe incidence of unspecific reactivity in anti-SARS-CoV-2 total antibody testing was 0.361% in 46,777 post-pandemic samples, similar to the incidence of 0.359% (4/1,114) in 1,114 pre-pandemic samples (p = 0.990). Subjects ≥ 19 years old had a 2.753-fold [95% confidence interval (CI), 1.130–6.706] higher probability of unspecific reactivity than subjects < 19 years old (p = 0.026). There was no significant difference between the sexes. The unspecific reactivity was associated with 14 categories within the disease spectrum, with three tops being the skin and subcutaneous tissue diseases (0.93%), respiratory system diseases (0.78%) and neoplasms diseases (0.76%). The percentage of patients with a titer ≥ 13.87 cut-off index (COI) in the unspecific reactivity was 7.69%.ConclusionOur results suggest a unspecific reactivity incidence rate of 0.361% involving 14 categories on the disease spectrum. Unspecific reactivity needs to be excluded when performing serologic antibody testing in COVID-19 epidemiological analyses or virus tracing.
Collapse
|
4
|
Lebourgeois S, David A, Chenane HR, Granger V, Menidjel R, Fidouh N, Noël B, Delelis O, Richetta C, Charpentier C, Chollet-Martin S, Descamps D, Visseaux B, de Chaisemartin L. Differential activation of human neutrophils by SARS-CoV-2 variants of concern. Front Immunol 2022; 13:1010140. [PMID: 36389717 PMCID: PMC9646985 DOI: 10.3389/fimmu.2022.1010140] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 10/14/2022] [Indexed: 07/22/2023] Open
Abstract
The emerging SARS-CoV-2 virus has affected the entire world with over 600 million confirmed cases and 6.5 million deaths as of September 2022. Since the beginning of the pandemic, several variants of SARS-CoV-2 have emerged, with different infectivity and virulence. Several studies suggest an important role of neutrophils in SARS-Cov-2 infection severity, but data about direct activation of neutrophils by the virus is scarce. Here, we studied the in vitro activation of human neutrophils by SARS-CoV-2 variants of concern (VOCs). In our work, we show that upon stimulation with SARS-Cov-2 infectious particles, human healthy resting neutrophils upregulate activation markers, degranulate IL-8, produce Reactive Oxygen Species and release Neutrophil Extracellular Traps. Neutrophil activation was dependent on TLR7/8 and IRF3/STING. We then compared the activation potential of neutrophils by SARS-CoV-2 variants and showed a significantly increased activation by the Delta variant and a decreased activation by the Omicron variant as compared to the initial strain. In this study, we demonstrate that the SARS-Cov-2 virus can directly activate neutrophils in COVID-19 and that the different VOCs had differences in neutrophil activation intensity that mirror the differences of clinical severity. These data highlight the need to address neutrophil-virus interactions as a potential target for therapeutic intervention in SARS-CoV-2 infection.
Collapse
Affiliation(s)
- Samuel Lebourgeois
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Ambroise David
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire d’Immunologie, Paris, France
| | - Houssem Redha Chenane
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Vanessa Granger
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire d’Immunologie, Paris, France
- Inflammation, Microbiome and Immunosurveillance, Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale (INSERM), Châtenay-Malabry, France
| | - Reyene Menidjel
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Nadhira Fidouh
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire de Virologie, Paris, France
| | - Benoît Noël
- Inflammation, Microbiome and Immunosurveillance, Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale (INSERM), Châtenay-Malabry, France
| | - Olivier Delelis
- LBPA-Laboratoire Biologie Pharmacologie Appliquée, Ecole Normal Supérieur (ENS) Paris-Saclay, Centre National de la Recherche Scientifique (CNRS) Unité Mix de Recherche (UMR), Université Paris-Saclay, Gif-sur-yvette, France
| | - Clémence Richetta
- LBPA-Laboratoire Biologie Pharmacologie Appliquée, Ecole Normal Supérieur (ENS) Paris-Saclay, Centre National de la Recherche Scientifique (CNRS) Unité Mix de Recherche (UMR), Université Paris-Saclay, Gif-sur-yvette, France
| | - Charlotte Charpentier
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire de Virologie, Paris, France
| | - Sylvie Chollet-Martin
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire d’Immunologie, Paris, France
- Inflammation, Microbiome and Immunosurveillance, Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale (INSERM), Châtenay-Malabry, France
| | - Diane Descamps
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire de Virologie, Paris, France
| | - Benoit Visseaux
- Université Paris Cité, Infection Antimicrobials Modelling Evolution (IAME), Institut National de la Santé et de la Recherche Médicale (INSERM), Paris, France
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire de Virologie, Paris, France
| | - Luc de Chaisemartin
- Assistance Publique - Hôpitaux de Paris (AP-HP), University Hospital Bichat-Claude Bernard, Laboratoire d’Immunologie, Paris, France
- Inflammation, Microbiome and Immunosurveillance, Université Paris-Saclay, Institut National de la Santé et de la Recherche Médicale (INSERM), Châtenay-Malabry, France
| |
Collapse
|
5
|
Dai S, Li J, Li J, Li L, Shi L, Cao L, Zhong X, Liu W, Wang Y, Ma L. Analysis of 4 cases of children with false-positive results of novel coronavirus-specific antibody. BMC Pediatr 2022; 22:372. [PMID: 35765042 PMCID: PMC9237983 DOI: 10.1186/s12887-022-03425-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 06/17/2022] [Indexed: 12/15/2022] Open
Abstract
Abstract
Background
This study attempts to explore the influencing factors and solutions of the colloidal gold method for novel coronavirus (2019-nCoV)-specific IgM/IgG antibody detection, summarize the clinical experience and perfect the examination process, improving the application value of antibody detection in COVID-19 diagnosis.
Methods
A total of 13,329 peripheral whole blood/plasma/serum samples were obtained for COVID-19 screening from children who visited the Children's Hospital of the Capital Institute of Pediatrics outpatient clinic from April 22, 2020, to November 30, 2020. The colloidal gold method was adopted for 2019-nCoV-specific IgM/IgG antibody detection. The virus nucleic acid test results, clinical records, and serum protein fingerprint results of antibody-positive patients were collected.
Results
All samples were examined using the colloidal gold method with two 2019-nCoV-specific IgM/IgG antibody detection kits. Four patients were tested single antibody-positive using both kits. The details were as follows: two cases of IgM ( +) and IgG (-) using plasma and serum separately, two cases of IgM (-) and IgG ( +) using serum and whole blood. The protein fingerprinting results and nucleic acid tests of 2019-nCoV antibodies were negative in the 4 cases. Considering the epidemiological history, clinical manifestations, and test results, these 4 children were ruled out for 2019-nCoV infection.
Conclusions
When the colloidal gold method was used to detect 2019-nCoV-specific IgM/IgG antibodies, it was important to ascertain the test results as precisely as possible. Specimen type and patient history may interfere with the diagnosis.
Collapse
|
6
|
Xu C, ye L, Xu XX, Song S, xu L, Kuang H. Rapid colloidal gold immunochromatographic assay for the detection of SARS-CoV-2 total antibodies after vaccination. J Mater Chem B 2022; 10:1786-1794. [DOI: 10.1039/d1tb02521j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An epidemic caused by the severe acute respiratory syndrome coronavirus (SARS-CoV-2) spread globally in just a few months. To help prevent the further spread of the virus, millions of people...
Collapse
|