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Xing S, Long J, Xie W, Luo C, He L, Li C, Zeng X. Characterization of a recombinant Aspergillus niger GZUF36 lipase immobilized by ionic liquid modification strategy. Appl Microbiol Biotechnol 2024; 108:233. [PMID: 38400957 PMCID: PMC10894092 DOI: 10.1007/s00253-024-13071-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 01/22/2024] [Accepted: 02/13/2024] [Indexed: 02/26/2024]
Abstract
Enzyme immobilized on magnetic nanomaterials is a promising biocatalyst with efficient recovery under applied magnets. In this study, a recombinant extracellular lipase from Aspergillus niger GZUF36 (PEXANL1) expressed in Pichia pastoris GS115 was immobilized on ionic liquid-modified magnetic nano ferric oxide (Fe3O4@SiO2@ILs) via electrostatic and hydrophobic interaction. The morphology, structure, and properties of Fe3O4@SiO2@ILs and immobilized PEXANL1 were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray diffraction, vibration sample magnetometer, and zeta potential analysis. Under optimized conditions, the immobilization efficiency and activity recovery of immobilized PEXANL1 were 52 ± 2% and 122 ± 2%, respectively. The enzymatic properties of immobilized PEXANL1 were also investigated. The results showed that immobilized PEXANL1 achieved the maximum activity at pH 5.0 and 45 °C, and the lipolytic activity of immobilized PEXANL1 was more than twice that of PEXANL1. Compared to PEXANL1, immobilized PEXANL1 exhibited enhanced tolerance to temperature, metal ions, surfactants, and organic solvents. The operation stability experiments revealed that immobilized PEXANL1 maintained 86 ± 3% of its activity after 6 reaction cycles. The enhanced catalytic performance in enzyme immobilization on Fe3O4@SiO2@ILs made nanobiocatalysts a compelling choice for bio-industrial applications. Furthermore, Fe3O4@SiO2@ILs could also benefit various industrial enzymes and their practical uses. KEY POINTS: • Immobilized PEXANL1 was confirmed by SEM, FT-IR, and XRD. • The specific activity of immobilized PEXANL1 was more than twice that of PEXANL1. • Immobilized PEXANL1 had improved properties with good operational stability.
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Affiliation(s)
- Shuqi Xing
- Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang, 550025, People's Republic of China
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Jia Long
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Wei Xie
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Chaocheng Luo
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Laping He
- Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang, 550025, People's Republic of China.
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China.
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China.
| | - Cuiqin Li
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China.
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China.
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, People's Republic of China.
| | - Xuefeng Zeng
- Key Laboratory of Agricultural and Animal Products Store & Processing of Guizhou Province, Guizhou University, Guiyang, 550025, People's Republic of China
- College of Liquor and Food Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
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The changing face of SDS denaturation: Complexes of Thermomyces lanuginosus lipase with SDS at pH 4.0, 6.0 and 8.0. J Colloid Interface Sci 2022; 614:214-232. [DOI: 10.1016/j.jcis.2021.12.188] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/16/2021] [Accepted: 12/29/2021] [Indexed: 12/15/2022]
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Wolfe AJ, Si W, Zhang Z, Blanden AR, Hsueh YC, Gugel JF, Pham B, Chen M, Loh SN, Rozovsky S, Aksimentiev A, Movileanu L. Quantification of Membrane Protein-Detergent Complex Interactions. J Phys Chem B 2017; 121:10228-10241. [PMID: 29035562 DOI: 10.1021/acs.jpcb.7b08045] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although fundamentally significant in structural, chemical, and membrane biology, the interfacial protein-detergent complex (PDC) interactions have been modestly examined because of the complicated behavior of both detergents and membrane proteins in aqueous phase. Membrane proteins are prone to unproductive aggregation resulting from poor detergent solvation, but the participating forces in this phenomenon remain ambiguous. Here, we show that using rational membrane protein design, targeted chemical modification, and steady-state fluorescence polarization spectroscopy, the detergent desolvation of membrane proteins can be quantitatively evaluated. We demonstrate that depleting the detergent in the sample well produced a two-state transition of membrane proteins between a fully detergent-solvated state and a detergent-desolvated state, the nature of which depended on the interfacial PDC interactions. Using a panel of six membrane proteins of varying hydrophobic topography, structural fingerprint, and charge distribution on the solvent-accessible surface, we provide direct experimental evidence for the contributions of the electrostatic and hydrophobic interactions to the protein solvation properties. Moreover, all-atom molecular dynamics simulations report the major contribution of the hydrophobic forces exerted at the PDC interface. This semiquantitative approach might be extended in the future to include studies of the interfacial PDC interactions of other challenging membrane protein systems of unknown structure. This would have practical importance in protein extraction, solubilization, stabilization, and crystallization.
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Affiliation(s)
- Aaron J Wolfe
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States.,Structural Biology, Biochemistry, and Biophysics Program, Syracuse University , 111 College Place, Syracuse, New York 13244-4100, United States
| | - Wei Si
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments and School of Mechanical Engineering, Southeast University , Nanjing 210096, China.,Department of Physics, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Zhengqi Zhang
- Department of Chemistry and Biochemistry, University of Delaware , 136 Brown Laboratory, Newark, Delaware 19716, United States
| | - Adam R Blanden
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University , 4249 Weiskotten Hall, 766 Irving Av., Syracuse, New York 13210, United States
| | - Yi-Ching Hsueh
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States
| | - Jack F Gugel
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States
| | - Bach Pham
- Department of Chemistry, University of Massachusetts , 820 LGRT, 710 North Pleasant Street, Amherst, Massachusetts 01003-9336, United States
| | - Min Chen
- Department of Chemistry, University of Massachusetts , 820 LGRT, 710 North Pleasant Street, Amherst, Massachusetts 01003-9336, United States
| | - Stewart N Loh
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University , 4249 Weiskotten Hall, 766 Irving Av., Syracuse, New York 13210, United States
| | - Sharon Rozovsky
- Department of Chemistry and Biochemistry, University of Delaware , 136 Brown Laboratory, Newark, Delaware 19716, United States
| | - Aleksei Aksimentiev
- Department of Physics, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Liviu Movileanu
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States.,Structural Biology, Biochemistry, and Biophysics Program, Syracuse University , 111 College Place, Syracuse, New York 13244-4100, United States.,Department of Biomedical and Chemical Engineering, Syracuse University , 329 Link Hall, Syracuse, New York 13244, United States
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Wolfe AJ, Hsueh YC, Blanden AR, Mohammad MM, Pham B, Thakur AK, Loh SN, Chen M, Movileanu L. Interrogating Detergent Desolvation of Nanopore-Forming Proteins by Fluorescence Polarization Spectroscopy. Anal Chem 2017; 89:8013-8020. [PMID: 28650154 PMCID: PMC5558884 DOI: 10.1021/acs.analchem.7b01339] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Understanding how membrane proteins interact with detergents is of fundamental and practical significance in structural and chemical biology as well as in nanobiotechnology. Current methods for inspecting protein-detergent complex (PDC) interfaces require high concentrations of protein and are of low throughput. Here, we describe a scalable, spectroscopic approach that uses nanomolar protein concentrations in native solutions. This approach, which is based on steady-state fluorescence polarization (FP) spectroscopy, kinetically resolves the dissociation of detergents from membrane proteins and protein unfolding. For satisfactorily solubilizing detergents, at concentrations much greater than the critical micelle concentration (CMC), the fluorescence anisotropy was independent of detergent concentration. In contrast, at detergent concentrations comparable with or below the CMC, the anisotropy readout underwent a time-dependent decrease, showing a specific and sensitive protein unfolding signature. Functionally reconstituted membrane proteins into a bilayer membrane confirmed predictions made by these FP-based determinations with respect to varying refolding conditions. From a practical point of view, this 96-well analytical approach will facilitate a massively parallel assessment of the PDC interfacial interactions under a fairly broad range of micellar and environmental conditions. We expect that these studies will potentially accelerate research in membrane proteins pertaining to their extraction, solubilization, stabilization, and crystallization, as well as reconstitution into bilayer membranes.
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Affiliation(s)
- Aaron J. Wolfe
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA
- Structural Biology, Biochemistry, and Biophysics Program, Syracuse University, 111 College Place, Syracuse, New York 13244-4100, USA
| | - Yi-Ching Hsueh
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA
| | - Adam R. Blanden
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 4249 Weiskotten Hall, 766 Irving Av., Syracuse, New York 13210, USA
| | - Mohammad M. Mohammad
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA
| | - Bach Pham
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003-9336, USA
| | - Avinash K. Thakur
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA
- Structural Biology, Biochemistry, and Biophysics Program, Syracuse University, 111 College Place, Syracuse, New York 13244-4100, USA
| | - Stewart N. Loh
- Department of Biochemistry and Molecular Biology, State University of New York Upstate Medical University, 4249 Weiskotten Hall, 766 Irving Av., Syracuse, New York 13210, USA
| | - Min Chen
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003-9336, USA
| | - Liviu Movileanu
- Department of Physics, Syracuse University, 201 Physics Building, Syracuse, New York 13244-1130, USA
- Structural Biology, Biochemistry, and Biophysics Program, Syracuse University, 111 College Place, Syracuse, New York 13244-4100, USA
- Department of Biomedical and Chemical Engineering, Syracuse University, 329 Link Hall, Syracuse, New York 13244, USA
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Khan JM, Khan MS, Alsenaidy MA, Ahmed A, Sen P, Oves M, Al-Shabib NA, Khan RH. Sodium louroyl sarcosinate (sarkosyl) modulate amyloid fibril formation in hen egg white lysozyme (HEWL) at alkaline pH: a molecular insight study. J Biomol Struct Dyn 2017; 36:1550-1565. [DOI: 10.1080/07391102.2017.1329097] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Javed Masood Khan
- Faculty of Food and Agricultural Sciences, Department of Food Science and Nutrition, King Saud University, 2460 Riyadh 11451, Saudi Arabia
| | - Mohd Shahnawaz Khan
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | - Anwar Ahmed
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Priyankar Sen
- Centre for Bioseparation Technology, VIT University, Vellore 632014, India
| | - Mohammad Oves
- Center of Excellence in Enviromental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nasser Abdulatif Al-Shabib
- Faculty of Food and Agricultural Sciences, Department of Food Science and Nutrition, King Saud University, 2460 Riyadh 11451, Saudi Arabia
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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6
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α-Lactalbumin and sodium dodecyl sulfate aggregates: Denaturation, complex formation and time stability. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.07.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jafari M, Mehrnejad F. Molecular Insight into Human Lysozyme and Its Ability to Form Amyloid Fibrils in High Concentrations of Sodium Dodecyl Sulfate: A View from Molecular Dynamics Simulations. PLoS One 2016; 11:e0165213. [PMID: 27768744 PMCID: PMC5074503 DOI: 10.1371/journal.pone.0165213] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 10/07/2016] [Indexed: 11/18/2022] Open
Abstract
Changes in the tertiary structure of proteins and the resultant fibrillary aggregation could result in fatal heredity diseases, such as lysozyme systemic amyloidosis. Human lysozyme is a globular protein with antimicrobial properties with tendencies to fibrillate and hence is known as a fibril-forming protein. Therefore, its behavior under different ambient conditions is of great importance. In this study, we conducted two 500000 ps molecular dynamics (MD) simulations of human lysozyme in sodium dodecyl sulfate (SDS) at two ambient temperatures. To achieve comparative results, we also performed two 500000 ps human lysozyme MD simulations in pure water as controls. The aim of this study was to provide further molecular insight into all interactions in the lysozyme-SDS complexes and to provide a perspective on the ability of human lysozyme to form amyloid fibrils in the presence of SDS surfactant molecules. SDS, which is an anionic detergent, contains a hydrophobic tail with 12 carbon atoms and a negatively charged head group. The SDS surfactant is known to be a stabilizer for helical structures above the critical micelle concentration (CMC) [1]. During the 500000 ps MD simulations, the helical structures were maintained by the SDS surfactant above its CMC at 300 K, while at 370 K, human lysozyme lost most of its helices and gained β-sheets. Therefore, we suggest that future studies investigate the β-amyloid formation of human lysozyme at SDS concentrations above the CMC and at high temperatures.
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Affiliation(s)
- Majid Jafari
- Department of Life Sciences Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran
| | - Faramarz Mehrnejad
- Department of Life Sciences Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran
- * E-mail:
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Jain R, Kumar R, Kumar S, Chhabra R, Agarwal MC, Kumar R. Analysis of the pH-dependent stability and millisecond folding kinetics of horse cytochrome c. Arch Biochem Biophys 2015; 585:52-63. [DOI: 10.1016/j.abb.2015.09.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 09/10/2015] [Accepted: 09/14/2015] [Indexed: 11/26/2022]
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9
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Gonçalves KM, Barbosa LR, Lima LMT, Cortines JR, Kalume DE, Leal IC, Mariz e Miranda LS, de Souza RO, Cordeiro Y. Conformational dissection of Thermomyces lanuginosus lipase in solution. Biophys Chem 2014; 185:88-97. [DOI: 10.1016/j.bpc.2013.12.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/02/2013] [Accepted: 12/04/2013] [Indexed: 01/05/2023]
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10
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Chen X, Li S, He L, Wang X, Liang P, Chen W, Bian M, Ren M, Lin J, Liang C, Xu J, Wu Z, Li X, Huang Y, Yu X. Molecular characterization of severin from Clonorchis sinensis excretory/secretory products and its potential anti-apoptotic role in hepatocarcinoma PLC cells. PLoS Negl Trop Dis 2013; 7:e2606. [PMID: 24367717 PMCID: PMC3868641 DOI: 10.1371/journal.pntd.0002606] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 10/28/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Clonorchiasis, caused by the infection of Clonorchis sinensis (C. sinensis), is a kind of neglected tropical disease, but it is highly related to cholangiocarcinoma and hepatocellular carcinoma (HCC). It has been well known that the excretory/secretory products of C. sinensis (CsESPs) play key roles in clonorchiasis associated carcinoma. From genome and transcriptome of C. sinensis, we identified one component of CsESPs, severin (Csseverin), which had three putative gelsolin domains. Its homologues are supposed to play a vital role in apoptosis resistance of tumour cell. METHODOLOGY/PRINCIPAL FINDINGS There was significant similarity in tertiary structures between human gelsolin and Csseverin by bioinformatics analysis. We identified that Csseverin expressed at life stage of adult worm, metacercaria and egg by the method of quantitative real-time PCR and western blotting. Csseverin distributed in vitellarium and intrauterine eggs of adult worm and tegument of metacercaria by immunofluorence assay. We obtained recombinant Csseverin (rCsseverin) and confirmed that rCsseverin could bind with calciumion in circular dichroism spectrum analysis. It was demonstrated that rCsseverin was of the capability of actin binding by gel overlay assay and immunocytochemistry. Both Annexin V/PI assay and mitochondrial membrane potential assay of human hepatocarcinoma cell line PLC showed apoptosis resistance after incubation with different concentrations of rCsseverin. Morphological analysis, apoptosis-associated changes of mitochondrial membrane potential and Annexin V/PI apoptosis assay showed that co-incubation of PLC cells with rCsseverin in vitro led to an inhibition of apoptosis induced by serum-starved for 24 h. CONCLUSIONS/SIGNIFICANCE Collectively, the molecular properties of Csseverin, a molecule of CsESPs, were characterized in our study. rCsseverin could cause obvious apoptotic inhibition in human HCC cell line. Csseverin might exacerbate the process of HCC patients combined with C. sinensis infection.
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Affiliation(s)
- Xueqing Chen
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Shan Li
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Lei He
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Xiaoyun Wang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Pei Liang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Wenjun Chen
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Meng Bian
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Mengyu Ren
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Jinsi Lin
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Chi Liang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Jin Xu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Zhongdao Wu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Xuerong Li
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Yan Huang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
| | - Xinbing Yu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People′s Republic of China
- Key Laboratory of Tropical Diseases Control at Sun Yat-sen University, Ministry of Education, Guangzhou, People′s Republic of China
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Zhang Z, Xu H, Gan W, Zeng S, Hu X. Schistosoma japonicum calcium-binding tegumental protein SjTP22.4 immunization confers praziquantel schistosomulumicide and antifecundity effect in mice. Vaccine 2012; 30:5141-50. [PMID: 22683520 DOI: 10.1016/j.vaccine.2012.05.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 04/27/2012] [Accepted: 05/22/2012] [Indexed: 11/19/2022]
Abstract
A family of platyhelminth tegument-specific proteins comprising of one or two calcium ion binding EF-hand and a dynein light chain-like domain, termed tegumental proteins, are considered as candidates of vaccine. In this study, we cloned and characterized SjTP22.4, a novel membrane-anchored tegumental protein in Schistosoma japonicum with theoretic MW of 22.4. The recombinant SjTP22.4 could be recognized by S. japonicum infected sera. Immunofluorescence revealed that this protein is not only located on the surface of tegument of adult and schistosomulum and cercaria, but also in the parenchymatous tissues and intestinal epithelium. Circular dichroism (CD) measurement demonstrated rSjTP22.4 had Ca(2+)-binding ability. The rSjTP22.4 vaccination without adjuvants produced comparable high level of antibody with that of immunization with adjuvants together indicated it was an antigen of strong antigenicity. The level of IgG1 is much higher than that of IgG2a and IgE is nearly negative in S. japonicum-infected and rSjTP22.4 immunized mice. In cercaria challenge experiment, mice vaccinated with SjTP22.4 showed no reduction in adult burden and egg production, comparing with the control mice, but 41% decrease in egg mature rate and 32% reduction in liver egg granuloma area. However, the SjTP22.4 immunized mice that received praziquantel treatment at 10d post infection caused 26% reduction in adult burden and 53% decrease in egg mature rate, comparing with the control mice only received praziquantel treatment. In conclusion, SjTP22.4 is a valuable vaccine candidate for S. japonicum of anti-pathogenesis and anti-transmission effect and plays a synergetic role in praziquantel to kill schistosomulum.
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Affiliation(s)
- Zhaoping Zhang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China
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