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Liu ML, Chen ZJ, Huang XQ, Wang H, Zhao JL, Shen YD, Luo L, Wen XW, Hammock B, Xu ZL. A bispecific nanobody with high sensitivity/efficiency for simultaneous determination of carbaryl and its metabolite 1-naphthol in the soil and rice samples. Environ Pollut 2023; 335:122265. [PMID: 37517641 PMCID: PMC10529271 DOI: 10.1016/j.envpol.2023.122265] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 08/01/2023]
Abstract
The simultaneous determination of carbaryl and its metabolite 1-naphthol is essential for risk assessment of pesticide exposure in agricultural and environmental samples. Herein, several bispecific nanobodies (BsNbs) with different lengths of hydrophilic linkers and junction sites were prepared and characterized for the simultaneous recognition of carbaryl and its metabolite 1-naphthol. It was found that the affinity of BsNbs to the analytes could be regulated by controlling linker length and linking terminal. Additionally, molecular simulation revealed that linker lengths affected the conformation of BsNbs, leading to alteration in sensitivity. The BsNb with G4S linker, named G4S-C-N-VHH, showing good thermal stability and sensitivity was used to develop a bispecific indirect competitive enzyme-linked immunosorbent assay (Bic-ELISA). The assay demonstrated a limit of detection of 0.8 ng/mL for carbaryl and 0.4 ng/mL for 1-naphthol in buffer system. Good recoveries from soil and rice samples were obtained, ranging from 80.0% to 112.7% (carbaryl) and 76.5%-110.8% (1-naphthol), respectively. Taken together, this study firstly provided a BsNb with high sensitivity and efficiency against environmental pesticide and its metabolite, and firstly used molecular dynamics simulation to explore the influence of linker on recognition. The results are valuable for the application of immunoassay with high efficiency in the fields of environment and agriculture.
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Affiliation(s)
- Min-Ling Liu
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Zi-Jian Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China; Laboratory of Quality & Safety Risk Assessment for Agro-products (Zhaoqing), Ministry of Agriculture and Rural Affairs, School of Food and Pharmaceutical Engineering, Zhaoqing University, Zhaoqing, 526061, China
| | - Xiao-Qing Huang
- Guangzhou Institute of Food Inspection, Guangzhou, 510410, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Jin-Li Zhao
- Guangzhou Institute of Food Inspection, Guangzhou, 510410, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Xiao-Wei Wen
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Bruce Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, United States
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety / Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou, 510642, China.
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Zhu X, Wang J, Wang YC, Zhu ZF, Tang J, Wen XW, Fang Y, Han J. Quantitative differentiation of malignant and benign thyroid nodules with multi-parameter diffusion-weighted imaging. World J Clin Cases 2022; 10:8587-8598. [PMID: 36157818 PMCID: PMC9453341 DOI: 10.12998/wjcc.v10.i24.8587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/25/2022] [Accepted: 07/22/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The value of conventional magnetic resonance imaging in the differential diagnosis of thyroid nodules is limited; however, the value of multi-parameter diffusion-weighted imaging (DWI) in the quantitative evaluation of thyroid nodules has not been well determined.
AIM To determine the utility of multi-parametric DWI including mono-exponential, bi-exponential, stretched exponential, and kurtosis models for the differentiation of thyroid lesions.
METHODS Seventy-nine patients (62 with benign and 17 with malignant nodules) underwent multi-b value diffusion-weighted imaging of the thyroid. Multiple DWI parameters were obtained for statistical analysis.
RESULTS Good agreement was found for diffusion parameters of thyroid nodules. Malignant lesions displayed lower diffusion parameters including apparent diffusion coefficient (ADC), the true diffusion coefficient (D), the perfusion fraction (f), the distributed diffusion coefficient (DDC), the intravoxel water diffusion heterogeneity (α) and kurtosis model-derived ADC (Dapp), and higher apparent diffusional kurtosis (Kapp) than benign entities (all P < 0.01), except for the pseudodiffusion coefficient (D*) (P > 0.05). The area under the ROC curve (AUC) of the ADC(0 and 1000) was not significantly different from that of the ADC(0 and 2000), ADC(0 to 2000), ADC(0 to 1000), D, DDC, Dapp and Kapp (all P > 0.05), but was significantly higher than the AUC of D*, f and α (all P < 0.05) for differentiating benign from malignant lesions.
CONCLUSION Multiple DWI parameters including ADC, D, f, DDC, α, Dapp and Kapp could discriminate benign and malignant thyroid nodules. The metrics including D, DDC, Dapp and Kapp provide additional information with similar diagnostic performance of ADC, combination of these metrics may contribute to differentiate benign and malignant thyroid nodules. The ADC calculated with higher b values may not lead to improved diagnostic performance.
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Affiliation(s)
- Xiang Zhu
- Department of Radiology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Jia Wang
- Department of Radiology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Yan-Chun Wang
- Department of Radiology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Ze-Feng Zhu
- Department of Radiology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Jian Tang
- Department of Head and Neck Surgery, the First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Xiao-Wei Wen
- Department of Pathology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Ying Fang
- Department of Pathology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
| | - Jun Han
- Department of Radiology, The First Hospital of Jiaxing & The Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang Province, China
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Li S, Yao TQ, Wang HF, Wen XW, Lin H, Gao ZH, Zhang Q, Mo Y, Tang D, Cheng Y, Liu XB, Shen JH. [Two-dimensional equivalent mechanical modeling and finite element analysis of normal female pelvic floor system]. Zhonghua Yi Xue Za Zhi 2022; 102:2189-2195. [PMID: 35872583 DOI: 10.3760/cma.j.cn112137-20211108-02478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To construct the geometric model of the pelvic floor by a two-dimensional equivalent mechanics method, and to explore the effect of the shape and position of pelvic floor organs and tissues on the biomechanical properties of the pelvic floor under different abdominal pressure. Methods: A 28-year-old healthy and symmetrical married infertile female volunteer was included. The pelvic floor tissue was scanned in the supine position using a 3.0T magnetic resonance scanner (Philips Company, Holland). Based on the method of magnetic resonance imaging (MRI) two-dimensional parameter measurement and computer aided design, the geometric model and finite element model of the female pelvic floor were established, and the biomechanical characteristics of the pelvic floor support system under different abdominal pressure were analyzed. Results: In this study, four different working conditions of the pelvic floor force were simulated under 60, 99, 168, and 208 cmH2O (1 cmH2O=0.098 kPa) abdominal pressure loads. The trend was as follows: under the abdominal pressure load, the retrograde flexion of the uterus occurred, the cervical, the middle and upper vaginal segment and the levator anus muscle had the characteristic change of mechanical axial direction pointing to the sacrum and coccyx, and the deformation of the levator anus muscle in the horizontal direction was greater than that in the vertical direction. With the increase of the abdominal pressure, the maximum stress values of the pelvic floor whole system of healthy subjects under four different working conditions were 0.194 3, 0.389 6, 0.557 1, and 0.627 5 MPa, respectively, and the maximum displacement values were 10, 14, 21 and 25 mm, respectively. The maximum stress values of the cervical and vaginal middle and upper segment were 0.111 7, 0.161 8, 0.250 6, and 0.304 1 MPa, respectively, and the maximum displacement values were 3, 6, 9, and 11 mm, respectively. The maximum stress of the perineal body was 0.063 4, 0.119 6, 0.235 2, and 0.288 0 MPa, and the maximum displacement was 1, 2, 4, and 5 mm. The maximum stress values of the levator anus muscle were 0.194 3, 0.389 6, 0.557 1, and 0.627 5 MPa, and the maximum displacement values were 2, 4, 7, and 8 mm, respectively. The maximum stress and maximum displacement of pelvic organs increased with the increase of the abdominal pressure under different working conditions. The stress axial relationship of normal female pelvic floor was that the middle and upper segment of uterus and vagina mainly acted on the sacrococcyx and the levator anus muscle, and the lower vaginal segment acts on the perineal body. Conclusions: The two-dimensional equivalent mechanical modeling and finite element analysis of the female pelvic floor system can accurately reflect the biomechanical characteristics of the female pelvic floor, and the resultant stress direction of the pelvic organs points to the sacrum and coccyx. The sacrum and coccyx, levator anus and perineal body play important stress supporting roles in the pelvic floor system.
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Affiliation(s)
- S Li
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - T Q Yao
- School of Mechanical and Electric Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - H F Wang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - X W Wen
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - H Lin
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Z H Gao
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Q Zhang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Y Mo
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - D Tang
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - Y Cheng
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
| | - X B Liu
- School of Mechanical and Electric Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - J H Shen
- Department of Urology, the First Affiliated Hospital of Kunming Medical University, Kunming 650093, China
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Chen ZJ, Zhang YF, Chen JL, Lin ZS, Wu MF, Shen YD, Luo L, Wang H, Wen XW, Hammock B, Lei HT, Xu ZL. Production and Characterization of Biotinylated Anti-fenitrothion Nanobodies and Development of Sensitive Fluoroimmunoassay. J Agric Food Chem 2022; 70:4102-4111. [PMID: 35333506 PMCID: PMC9484545 DOI: 10.1021/acs.jafc.2c00826] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A simple and sensitive fluoroimmunoassay (FIA) based on a heavy-chain antibody (VHH) for rapid detection of fenitrothion was developed. A VHH library was constructed from an immunized alpaca, and one clone recognizing fenitrothion (namely, VHHjd8) was achieved after careful biopanning. It was biotinylated by fusing with the Avi tag and biotin ligase to obtain a fusion protein (VHHjd8-BT), showing both binding capacity to fenitrothion and the streptavidin poly-horseradish peroxidase conjugate (SA-polyHRP). Based on a competitive assay format, the absorbance spectrum of oxidized 3,3',5,5'-tetramethylbenzidine generated by SA-polyHRP overlapped the emission spectrum of carbon dots, which resulted in quenching of signals due to the inner-filter effect. The developed FIA showed an IC50 value of 1.4 ng/mL and a limit of detection of 0.03 ng/mL, which exhibited 15-fold improvement compared with conventional enzyme-linked immunosorbent assay. The recovery test of FIA was validated by standard GC-MS/MS, and the results showed good consistency, indicating that the assay is an ideal tool for rapid screening of fenitrothion in bulk food samples.
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Affiliation(s)
- Zi-Jian Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Yi-Feng Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Jia-Lin Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Ze-Shan Lin
- Guangzhou Institute of Food Inspection, Guangzhou 510410, China
| | - Min-Fu Wu
- Department of Food Science, Foshan Polytechnic, Foshan 528137, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Xiao-Wei Wen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Bruce Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Hong-Tao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/ Research Center for Green Development of Agriculture, South China Agricultural University, Guangzhou 510642, China
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Tsai FS, Wen XW, Srivastava S. Editorial: The Psychology of Food Safety and Consumption. Front Psychol 2021; 12:767212. [PMID: 34867669 PMCID: PMC8638618 DOI: 10.3389/fpsyg.2021.767212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/08/2021] [Indexed: 12/03/2022] Open
Affiliation(s)
- Fu-Sheng Tsai
- North China University of Water Resources and Electric Power, Zhengzhou, China.,Department of Business Administration, Cheng Shiu University, Kaohsiung, Taiwan.,Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung, Taiwan.,Super Micro Mass Research and Technology Center, Cheng Shiu University, Kaohsiung, Taiwan
| | - Xiao-Wei Wen
- College of Business, South China Agricultural University, Guangzhou, China
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Ren HX, Zhong Q, Miao YB, Wen XW, Wu GY, Wang HL, Zhang Y. A label-free reusable aptasensor for Alzheimer's disease. Mikrochim Acta 2020; 187:515. [PMID: 32839875 DOI: 10.1007/s00604-020-04518-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 08/18/2020] [Indexed: 11/29/2022]
Abstract
To early effectively detect amyloid-beta (Aβ) oligomers, a label-free reusable aptasensor was designed. This aptasensor based on a luminescent nanoscale lanthanum-based metal-organic framework (L-MOF)-armored single-stranded DNA antibody (MOF-armored-anti-DNA antibody) as signal tags and aptamer bound to magnetic beads (Apt-MB) as capture probe. The reusable aptasensor combines signal tag and capture probe with antigen-antibody interaction. When the reusable aptasensor is formed, the strong fluorescence intensity of L-MOF will "turn off" by photo-induced electron transfer from excited states to an unfilled d shell of iron cations on the nanoparticle surface. Upon the presence of Aβ oligomers in serum samples, they can be especially distinguished with the Aβ oligomers aptamer in capture probes and then signal tags are released into the solution for developing the fluorescence aptasensor under excitation/emission 365 nm/430 nm. Meanwhile, the aptamer was recovered from the complex of Aβ oligomers/Apt-MB by heat treatment. When the temperature returns to room temperature, the recovered aptamer in the capture probe can once again bound to the MOF-armored-anti-DNA antibody for reuse. The label-free reusable aptasensor system detection has high sensitivity and selectivity toward Aβ oligomers (LOD = 0.4 pg/mL) and an excellent linear range (0.001-100 ng/mL). This strategy is a fruitful step for the development of reusable aptasensor and may turn on new avenues for the applications of Aβ oligomer detection in clinical diagnosis.Graphical abstract.
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Affiliation(s)
- Hong-Xia Ren
- School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, 563000, Guizhou, China.
| | | | - Yang-Bao Miao
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan, 30013
| | - Xiao-Wei Wen
- School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, 563000, Guizhou, China
| | - Gui-Yan Wu
- School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, 563000, Guizhou, China
| | - Hui-Ling Wang
- School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, 563000, Guizhou, China
| | - Ying Zhang
- School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, 563000, Guizhou, China
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Guo ZQ, Lü QS, Wang Z, Lu LH, Lu N, Wen XW, Wu WX, Yao M. [Expression and clinical significance of Ser10 phosphorylated p27(kip1) protein in human breast carcinoma]. Zhonghua Yi Xue Za Zhi 2017; 97:1396-1399. [PMID: 28535625 DOI: 10.3760/cma.j.issn.0376-2491.2017.18.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the expression and clinicopathological significance of Ser10 phosphorylated p27(kip1)(P-p27Ser10) protein in human breast carcinoma tissue. Methods: Tissue specimens were obtained from 111 cases with breast carcinoma from January 2004 to December 2005. And the expression of P-p27Ser10 protein for each specimen was detected by immunohistochemical (EnVision) analysis. Six representative paired samples of cancerous and paired adjacent normal tissues were collected and detected by Western blot. The relationships between the expression levels of P-p27Ser10 protein and its clinicopathological characteristics in primary breast carcinoma were retrospectively analyzed.The association of P-p27Ser10 and Jab1 protein was detected by co-immunoprecipitation method. Results: A high-level expression of P-p27Ser10 was present in cancerous tissues but not in paired adjacent normal tissues. The positive expression rate of P-p27Ser10 protein was as high as 88.3% (98/111) and 7.2% (8/111) in cancerous and paired adjacent normal tissues respectively (P<0.05). P-p27Ser10 expression was correlated with tumor size, lymph node metastasis and TNM stage (all P<0.05). P-p27Ser10 expression was significantly correlated with Ki-67 (r=0.582, P<0.05), and inversely correlated with p27 (r=-0.426, P<0.05). Co-immunoprecipitation revealed that the association of P-p27Ser10 and Jab1 protein was increased in breast carcinoma. Conclusion: Over-expression of P-p27Ser10 protein might play an important role in the pathogenesis of breast carcinoma. P-p27Ser10 protein therefore represents a novel diagnostic marker and therapeutic target in patients with breast carcinoma.
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Affiliation(s)
- Z Q Guo
- Department of Pathology, the First Affiliated Hospital of Jiaxing Collage, Jiaxing 314000, China
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