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Liang YF, Yang JY, Shen YD, Xu ZL, Wang H. A breakthrough of immunoassay format for hapten: recent insights into noncompetitive immunoassays to detect small molecules. Crit Rev Food Sci Nutr 2024:1-11. [PMID: 38356229 DOI: 10.1080/10408398.2024.2315473] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Immunoassay based on the antibodies specific for targets has advantages of high sensitivity, simplicity and low cost, therefore it has received more attention in recent years, especially for the rapid detection of small molecule chemicals present in foods, diagnostics and environments. However, limited by low molecular weight and only one antigenic determinant existed, immunoassays for these small molecule chemicals, namely hapten substances, were commonly performed in a competitive immunoassay format, whose sensitivities were obviously lower than the sandwich enzyme-linked immunosorbent assay generally adaptable for the protein targets. In order to break through the bottleneck of detection format, researchers have designed and established several novel noncompetitive immunoassays for the haptens in the past few years. In this review, we focused on the four representative types of noncompetitive immunoassay formats and described their characteristics and applications in rapid detection of small molecules. Meanwhile, a systematic discussion on the current technologies challenges and the possible solutions were also summarized. This review aims to provide an updated overview of the current state-of-the-art in noncompetitive immunoassay for small molecules, and inspire the development of novel designs for small molecule detection.
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Affiliation(s)
- Yi-Fan Liang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jin-Yi Yang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
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2
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Ono E, Lenief V, Lefevre MA, Cuzin R, Guironnet-Paquet A, Mosnier A, Nosbaum A, Nicolas JF, Vocanson M. Topical corticosteroids inhibit allergic skin inflammation but are ineffective in impeding the formation and expansion of resident memory T cells. Allergy 2024; 79:52-64. [PMID: 37539746 DOI: 10.1111/all.15819] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/28/2023] [Accepted: 05/23/2023] [Indexed: 08/05/2023]
Abstract
BACKGROUND Tissue-resident memory T (TRM ) cells are detrimental in allergic contact dermatitis (ACD), in which they contribute to the chronicity and severity of the disease. METHODS We assessed the impact of a standard topical corticosteroid (TCS) treatment, triamcinolone acetonide (TA), on the formation, maintenance and reactivation of epidermal TRM cells in a preclinical model of ACD to 2,4-dinitrofluorobenzene. TA 0.01% was applied at different time points of ACD response and we monitored skin inflammation and tracked CD8+ CD69+ CD103+ TRM by flow cytometry and RNA sequencing. RESULTS The impact of TA on TRM formation depended on treatment regimen: (i) in a preventive mode, that is, in sensitized mice before challenge, TA transiently inhibited the infiltration of effector T cells and the accumulation of TRM upon hapten challenge. In contrast, (ii) in a curative mode, that is, at the peak of the ACD response, TA blocked skin inflammation but failed to prevent the formation of TRM . Finally, (iii) in a proactive mode, that is, on previous eczema lesions, TA had no effect on the survival of skin TRM , but transiently inhibited their reactivation program upon allergen reexposure. Indeed, specific TRM progressively regained proliferative functions upon TA discontinuation and expanded in the tissue, leading to exaggerated iterative responses. Interestingly, TRM re-expansion correlated with the decreased clearance of hapten moieties from the skin induced by repeated TA applications. CONCLUSIONS Our results demonstrate that TCS successfully treat ACD inflammation, but are mostly ineffective in impeding the formation and expansion of allergen-specific TRM , which certainly restricts the induction of lasting tolerance in patients with chronic dermatitis.
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Affiliation(s)
- Emi Ono
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Vanina Lenief
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Marine-Alexia Lefevre
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Roxane Cuzin
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Aurélie Guironnet-Paquet
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Etablissement Français du Sang (EFS) Auvergne Rhône-Alpes, Apheresis Unit, Hôpital Lyon Sud, Pierre Bénite, France
| | - Amandine Mosnier
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
| | - Audrey Nosbaum
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Allergology and Clinical Immunology Department, Lyon Sud University Hospital, Pierre Bénite, France
| | - Jean-Francois Nicolas
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
- Allergology and Clinical Immunology Department, Lyon Sud University Hospital, Pierre Bénite, France
| | - Marc Vocanson
- CIRI-Centre International de Recherche en Infectiologie, INSERM, U1111, Université Lyon, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, CNRS UMR 5308, Lyon, France
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3
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Berd D. Portrait of an autologous cancer vaccine: Then and now. Hum Vaccin Immunother 2023; 19:2172925. [PMID: 36755486 PMCID: PMC10012894 DOI: 10.1080/21645515.2023.2172925] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
Active immunotherapy of cancer with therapeutic vaccines has been the subject of experimental and clinical studies for at least 50 years. Our approach has employed 1) autologous, human cancer cells because of extensive evidence that tumor rejection antigens may differ between multiple tumors of the same histology; 2) the immunopotentiating drug, cyclophosphamide; and 3) haptens, particularly dinitrophenyl. Multiple clinical trials in 455 patients with melanoma and ovarian cancer have shown that administration of haptenized vaccines at the proper dosage-schedule regularly induces T cell-mediated immunity to autologous tumor cells as measured by delayed-type hypersensitivity. Moreover, the vaccine causes changes in the tumor site suggestive of an immune reaction, including inflammation and infiltration with CD8+ T lymphocytes that are activated and produce cytokines. The T cell response is oligoclonal, and dominant Vβ families differ between patients. Studies of measurable metastases show clinically important tumor regression. Commercial development of this technology is clearly feasible.
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Affiliation(s)
- David Berd
- Biovaxys Technology Corp, Etobicoke, ON, Canada
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4
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Zhang T, Liu C, Zheng H, Han X, Lin H, Cao L, Sui J. The specific biopanning of single-domain antibody against haptens based on a functionalized cryogel. J Mol Recognit 2023; 36:e2999. [PMID: 36225143 DOI: 10.1002/jmr.2999] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 12/15/2022]
Abstract
Phage display technology is commonly applied for high-throughput screening of single-domain antibodies (sdAbs), and the problem of non-specific adsorption caused by carrier proteins seriously affects the biopanning of single-domain antibodies specific to haptens. In this paper, enrofloxacin (ENR)-functionalized cryogels were prepared by the ethylenediamine (EDA) and carbodiimide methods for application in the biopanning of ENR-specific phages. To improve the efficiency of biopanning, double blocking, a wash solution flow rate of 1 mL/min, and phage pre-incubation were applied to the biopanning process through single-factor experiments. Results of flat colony counting showed that the phage output of AG-ENR cryogels was 15 times higher than that of AG cryogels for the same input amount. And seven complete sequences of ENR-specific shark sdAbs were obtained by monoclonal phage ELISA and sequence alignment. All these results indicate that functionalized cryogels could be used as a novel and efficient method for phage biopanning for single-domain antibodies to haptens.
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Affiliation(s)
- Tianjiao Zhang
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Chang Liu
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Hongwei Zheng
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Xiangning Han
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Hong Lin
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Limin Cao
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Jianxin Sui
- Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao, China
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5
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Han J, Stratman S, Young JN, Poplausky D, Owji S, Luu Y, Estrada Y, Correa da Rosa J, Krueger JG, Gulati N. Unique protein signatures evolve during the course of a delayed-type hypersensitivity reaction in human skin. J Dermatol 2022. [PMID: 36578124 DOI: 10.1111/1346-8138.16688] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 11/18/2022] [Accepted: 12/06/2022] [Indexed: 12/30/2022]
Abstract
Diphencyprone (DPCP) is a hapten that causes a delayed-type hypersensitivity reaction when applied topically. It has clinical uses in the treatment of various conditions such as melanoma metastases, warts, and alopecia areata, but the mechanisms are currently not well understood in humans. To further characterize the immunologic effects of DPCP, the authors performed a proteomic analysis of normal skin of eight healthy volunteers following a single application of DPCP and compared them with placebo-treated skin from the same volunteers. A total of 96 proteins were examined using the Olink immuno-oncology panel at 3 days (peak response), 14 days (partially resolved response), and 120 days (completely resolved response). Our analysis revealed significant upregulation of markers of immune cell activation (interleukin [IL] 8), vascular and tissue remodeling (matrix metallopeptidase 12 [MMP12], nitric oxide synthase 3 [NOS3]), antineoplastic markers (granzyme B [GZMB]), and the Th1 axis (interferon gamma [IFNG], chemokine (C-X-C motif) ligand [CXCL] 9, CXCL10, CXCL11) at days 3 and 14 compared with placebo (p < 0.05). In addition, several negative regulators of immune function such as programmed cell death 1 (PD1), programmed cell death ligand 1 (PDL1) (p < 0.001), and lymphocyte activation gene 3 (LAG3) (p < 0.05) were significantly upregulated at days 3 and 14. This induction of negative regulators may explain the seemingly paradoxical therapeutic benefits of DPCP in autoimmune conditions such as alopecia areata. The current analysis also indicated IL-4 upregulation only at day 3, followed by IL-12 upregulation only at day 14, suggesting a transient Th2 response followed by Th1 polarization. Overall, these data suggest a complex and evolving immunological delayed-type hypersensitivity response to a single application of DPCP over time. Future proteomic studies of samples from patients with melanoma metastases, warts, and alopecia areata treated long term with DPCP are needed to further evaluate its pharmacologic mechanisms.
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Affiliation(s)
- Joseph Han
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Scott Stratman
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Jade N Young
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Dina Poplausky
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Shayan Owji
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Yen Luu
- School of Medicine, University of Missouri, Kansas City, Missouri, USA
| | - Yeriel Estrada
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Joel Correa da Rosa
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - James G Krueger
- Laboratory for Investigative Dermatology, Rockefeller University, New York, New York, USA
| | - Nicholas Gulati
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Swofford CA, Nordeen SA, Chen L, Desai MM, Chen J, Springs SL, Schwartz TU, Sinskey AJ. Structure and Specificity of an Anti-Chloramphenicol Single Domain Antibody for Detection of Amphenicol Residues. Protein Sci 2022; 31:e4457. [PMID: 36153664 PMCID: PMC9601811 DOI: 10.1002/pro.4457] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 08/31/2022] [Accepted: 09/19/2022] [Indexed: 11/21/2022]
Abstract
Antibiotics in aquaculture prevent bacterial infection of fish, but their misuse is a public health risk and contributes to the unintentional creation of multiresistant pathogens. Regulatory agencies cannot do the rigorous, expensive testing required to keep up with the volume of seafood shipments. Current rapid test kits for these drugs enable the increase in testing needed for adequate monitoring of food supply chains, but they lack a high degree of accuracy. To combat this, we set out to discover and engineer single‐domain antibodies (VHHs) that bind to small molecule antibiotics, and that can be used in rapid test kits. The small size, solubility, and stability of VHHs are useful properties that can improve the reliability and shelf‐life of test kits for these adulterants. Here, we report a novel anti‐chloramphenicol VHH (Chl‐VHH) with a disassociation constant of 57 nM. This was achieved by immunizing a llama against a chloramphenicol‐keyhole limpet hemocyanin (KLH) conjugate and screening for high affinity binders through phage display. The crystal structure of the bound‐VHH to chloramphenicol was key to identifying a mutation in the binding pocket that resulted in a 16‐fold improvement in binding affinity. In addition, the structure provides new insights into VHH‐hapten interactions that can guide future engineering of VHHs against additional targets. PDB Code(s): 7TJC;
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Affiliation(s)
- Charles A Swofford
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA.,Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
| | - Sarah A Nordeen
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA
| | - Lu Chen
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
| | - Mahaam M Desai
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
| | - Joanna Chen
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
| | - Stacy L Springs
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
| | - Thomas U Schwartz
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA
| | - Anthony J Sinskey
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA.,Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, MA
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7
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Nomura T, Kabashima K. Advances in Atopic Dermatitis in 2019-2020: Endotypes from skin barrier, ethnicity, properties of antigen, cytokine profiles, microbiome, and engagement of immune cells. J Allergy Clin Immunol 2021; 148:1451-1462. [PMID: 34756922 DOI: 10.1016/j.jaci.2021.10.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 11/16/2022]
Abstract
Key research advances in atopic dermatitis (AD) suggest the complexity of its endotypes. A comprehensive serum biomarker panel revealed at least four types of AD. Some represent classic TH2-dominant AD with filaggrin mutations commonly reported in Europeans, a simultaneously activated multipolar axes of cytokines often reported in Asians, and an intrinsic type characterized by TH2-inferiority. Innate lymphoid cells, including NK cells, NKT cells, and fibroblasts, play a role in AD development and heterogeneity. Here, we discuss the endotypes of AD from the perspective of antigen types (hapten vs. protein antigens), barrier function, and a novel set of immune cells. Endotypic stratification of AD may lead to the development of customized therapeutic strategies in the future.
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Affiliation(s)
- Takashi Nomura
- Department of Dermatology, Faculty of Medicine, Kyoto University 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kenji Kabashima
- Department of Dermatology, Faculty of Medicine, Kyoto University 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
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8
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Zhu J, Li Q, Yu X, Zhang X, Li H, Wen K, Ke Y, Zhang S, Wang Z. Synthesis of hapten, production of monoclonal antibody, and development of immunoassay for ribavirin detection in chicken. J Food Sci 2021; 86:2851-2860. [PMID: 34146404 DOI: 10.1111/1750-3841.15789] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/08/2021] [Accepted: 04/27/2021] [Indexed: 12/21/2022]
Abstract
Ribavirin (RBV) is an effective antiviral drug, whose use is prohibited in animal husbandry worldwide. In this work, a novel immunizing hapten of RBV, named Hapten 4, was designed by comparing the conformational and electronic properties of RBV and haptens based on computational chemistry. Hapten 4 was synthesized and conjugated with carrier proteins to produce monoclonal antibody (mAb). The obtained mAb 4C3 for RBV exhibited an IC50 value of 6.24 ng/ml in an indirect competitive enzyme-linked immunosorbent assay (icELISA) and displayed no cross-reaction with five other antiviral drugs, including amantadine. The applicability of the developed icELISA was verified in chicken, with a calculated limit of detection of 4.23 µg/kg. The recoveries in spiked chicken were 79.2%-107.3% with a coefficient of variation less than 15.9%. The results indicated that the produced antibody from the new hapten was reliable and would be useful for RBV screening in chicken. PRACTICAL APPLICATION: RBV is a broad-spectrum antiviral drug, which is commonly used illegally in poultry farms. A high-affinity mAb 4C3 against RBV was produced and used to develop icELISA with acceptable sensitivity and accuracy. The constructed icELISA has excellent performance for detecting RBV residues in chicken.
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Affiliation(s)
- Jianyu Zhu
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Qiang Li
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Xuezhi Yu
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Xiya Zhang
- Henan Province Engineering Research Center for Food Safety Control of Processing and Circulation, College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Hongfang Li
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Kai Wen
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Yuebin Ke
- Department of Genetic Toxicology, Shenzhen Center for Disease Control and Prevention, People's Republic of China
| | - Suxia Zhang
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Zhanhui Wang
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
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Abstract
Synthetic cannabinoids (SCs) constitute a significant portion of psychoactive substances forming a major public health risk. Due to the wide variety of SCs, broadly neutralizing antibodies generated by active immunization present an intriguing pathway to combat cannabinoid use disorder. Here, we probed hapten design for antibody affinity and cross reactivity against two classes of SCs. Of the 10 haptens screened, 3 vaccine groups revealed submicromolar IC50, each targeting 5-6 compounds in our panel of 22 drugs. Moreover, SCs were successfully sequestered when administered by vaping or intraperitoneal injection, which was confirmed within animal models by observing locomotion, body temperature, and pharmacokinetics. We also discovered synergistic effects to simultaneously blunt two drug classes through an admixture vaccine approach. Collectively, our study provides a comprehensive foundation for the development of vaccines against SCs.
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10
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Irais CM, María-de-la-Luz SG, Dealmy DG, Agustina RM, Nidia CH, Mario-Alberto RG, Luis-Benjamín SG, María-Del-Carmen VM, David PE. Plant Phenolics as Pathogen-Carrier Immunogenicity Modulator Haptens. Curr Pharm Biotechnol 2020; 21:897-905. [PMID: 31965941 PMCID: PMC7536807 DOI: 10.2174/1389201021666200121130313] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 11/28/2019] [Accepted: 01/06/2020] [Indexed: 12/29/2022]
Abstract
Background Pathogens use multiple mechanisms to disrupt cell functioning in their host and allow pathogenesis. These mechanisms involve communication between the pathogen and the host cell through protein-protein interactions. Methods Protein-protein interactions chains referred to as signal transduction pathways are the processes by which a chemical or physical signal transmits through a cell as series of molecular events so the pathogen needs to intercept these molecular pathways at few positions to induce pathogenesis such as pathogen viability, infection or hypersensitivity. Results The pathogen nodes of interception are not necessarily the most immunogenic; so that novel immunogenicity-improvement strategies need to be developed thought a chemical conjugation of the pathogen-carrier nodes to develop an efficient immune response in order to block pathogenesis. On the other hand, if pathogen-carriers are immunogens; toleration ought to be induced by this conjugation avoiding hypersensitivity. Thus, this paper addresses the biological plausibility of plant-phenolics as pathogen-carrier immunogenicity modulator haptens. Conclusion The plant-phenolic compounds have in their structure functional groups such as hydroxyl, carbonyl, carboxyl, ester, or ether, capable of reacting with the amino or carbonyl groups of the amino acids of a pathogen-carrier to form conjugates. Besides, the varied carbon structures these phenolic compounds have; it is possible to alter the pathogen-carrier related factors that determine the immunogenicity: 1) Structural complexity, 2) Molecular size, 3) Structural heterogeneity, 4) Accessibility to antigenic determinants or epitopes, 5) Optical configuration, 6) Physical state, or 7) Molecular rigidity.
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Affiliation(s)
- Castillo-Maldonado Irais
- Department of Biochemistry, Center for Biomedical Research of the Faculty of Medicine, Torreon Unit, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | | | - Delgadillo-Guzmán Dealmy
- Department of Pharmacology, Faculty of Torreon Unit Medicine, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | - Ramírez-Moreno Agustina
- School of Sciences Biological Unit Torreon, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | - Cabral-Hipólito Nidia
- Department of Biochemistry, Center for Biomedical Research of the Faculty of Medicine, Torreon Unit, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | - Rivera-Guillén Mario-Alberto
- Department of Biochemistry, Center for Biomedical Research of the Faculty of Medicine, Torreon Unit, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | - Serrano-Gallardo Luis-Benjamín
- Department of Biochemistry, Center for Biomedical Research of the Faculty of Medicine, Torreon Unit, Autonomous University of Coahuila (UA de C), Torreon, Mexico
| | | | - Pedroza-Escobar David
- Department of Biochemistry, Center for Biomedical Research of the Faculty of Medicine, Torreon Unit, Autonomous University of Coahuila (UA de C), Torreon, Mexico
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11
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Climacosa FMM, King RAN, Santos BMM, Caoili SEC. Development and Characterization of Polymeric Peptides for Antibody Tagging of Bacterial Targets. Protein Pept Lett 2020; 27:962-970. [PMID: 32342800 DOI: 10.2174/0929866527666200427212940] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/20/2020] [Accepted: 02/27/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Microbe-Binding Peptides (MBPs) are currently being investigated to address the problem of antimicrobial resistance. Strategies enhancing their antimicrobial activity have been developed, including peptide dimerization. Here, we present an alternative approach based on peptide polymerization, yielding hapten-labelled polymeric MBPs that mediate tagging of bacteria with anti-hapten antibodies, for enhanced immune recognition by host phagocytes. METHODS C-terminally amidated analogs of the bacterial-binding peptide IIGGR were synthesized, with or without addition of cysteine residues at both N- and C-termini. Peptides were subjected to oxidizing conditions in a dimethyl-sulfoxide/water solvent system, and polymerization was demonstrated using SDS-PAGE. Peptides were then N-terminally labelled with a trinitrophenyl (TNP) group using trinitrobenzene sulfonate (TNBS). Binding to representative bacteria was demonstrated by ELISA using anti-TNP antibodies and was quantified as half-maximal effective concentration (EC50). Minimum Inhibitory Concentration (MIC) and concentration yielding 50% hemolysis (H50) were estimated. Neutrophil phagocytic index was determined for TNP-labelled polymeric bacterial- binding peptide (Pbac) with anti-TNP antibodies and/or serum complement. RESULTS Polydisperse Pbac was synthesized. EC50 was lower for Pbac than for the corresponding monomeric form (Mbac), for both Staphylococcus aureus ATCC 29213 and Escherichia coli ATCC 25922. MIC and H50 were >250μg/mL for both Pbac and Mbac. A complement-independent increase in neutrophil phagocytic index was observed for E. coli treated with TNP-labelled Pbac in conjunction with anti-TNP antibodies. CONCLUSION Our data suggest that hapten-labelled polymeric bacterial-binding peptides may easily be produced from even crude synthetic oligopeptide precursors, and that such bacterial-binding peptides in conjunction with cognate anti-hapten antibodies can enhance immune recognition of bacteria by host phagocytes.
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Affiliation(s)
- Fresthel Monica M Climacosa
- Department of Medical Microbiology, College of Public Health, University of the Philippines, Manila, Philippines,Biomedical Innovations Research for Translational Health Science (BIRTHS) Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines, Manila, Philippines
| | - Ruby Anne N King
- Biomedical Innovations Research for Translational Health Science (BIRTHS) Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines, Manila, Philippines
| | - Bobbie Marie M Santos
- Biomedical Innovations Research for Translational Health Science (BIRTHS) Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines, Manila, Philippines,Department of Ophthalmology and Visual Sciences, University of the Philippines - Philippine General Hospital, Manila, Philippines
| | - Salvador Eugenio C Caoili
- Biomedical Innovations Research for Translational Health Science (BIRTHS) Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, University of the Philippines, Manila, Philippines
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12
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Abstract
Karl Landsteiner applied the sciences of biochemistry, pathology, microbiology, and immunology in medical research to great success during the first half of the 20th century. Although he is principally known for elucidating the major blood group antigens A and B and their isoantibodies for which he was awarded the Nobel Prize in Physiology or Medicine, Landsteiner made many other important medical discoveries. In that respect, he ascertained that paralytic poliomyelitis was due to a virus, the pancreas was damaged in cystic fibrosis, simple chemicals called haptens were able to combine with antibodies, and the Rh antigen that was later found to be the principal cause of hemolytic anemia of the newborn was found in most humans. Moreover, Landsteiner's book "The Specificity of Serological Reactions" was a precursor to the molecular revolution in immunology that occurred after Second World War. Finally, he was one of the leaders of the American Association of Immunology and of the Journal of Immunology.
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Affiliation(s)
- Armond S Goldman
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, USA
| | - Frank C Schmalstieg
- Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, USA
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13
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Lazzarini R, Hafner MDFS, Rangel MG. Evaluation of the presence of allergens in children's products available for sale in a big city. An Bras Dermatol 2018; 93:457-459. [PMID: 29924241 PMCID: PMC6001089 DOI: 10.1590/abd1806-4841.20187111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 08/30/2017] [Indexed: 01/03/2023] Open
Abstract
Children's products are considered safe by the general population and doctors. Labels with terms such as "hypoallergenic" or "dermatologically recommended and tested" denote trust and credibility with the idea that they can be used by any individual. Patients with allergic contact dermatitis may be sensitive to allergens present in any product, including children's. There is insufficient knowledge about allergens in these products in our country. We evaluated 254 children's products, and at least one allergen was present in 236 (93%) of them. The indication of a topical product should be careful and based on contact tests.
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Affiliation(s)
- Rosana Lazzarini
- Dermatology Clinic. Santa Casa de São Paulo, São
Paulo (SP), Brazil
| | | | - Mayara Gomes Rangel
- Medical School Student, Faculdade de Ciências Médicas
da Santa Casa de São Paulo (FCMSCSP), São Paulo (SP), Brazil
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14
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Hegerle N, Bose J, Ramachandran G, Galen JE, Levine MM, Simon R, Tennant SM. Overexpression of O-polysaccharide chain length regulators in Gram-negative bacteria using the Wzx-/Wzy-dependent pathway enhances production of defined modal length O-polysaccharide polymers for use as haptens in glycoconjugate vaccines. J Appl Microbiol 2018; 125:575-585. [PMID: 29603538 PMCID: PMC6726474 DOI: 10.1111/jam.13772] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/20/2017] [Accepted: 03/26/2018] [Indexed: 11/30/2022]
Abstract
Aims O‐polysaccharide (OPS) molecules are protective antigens for several bacterial pathogens, and have broad utility as components of glycoconjugate vaccines. Variability in the OPS chain length is one obstacle towards further development of these vaccines. Introduction of sizing steps during purification of OPS molecules of suboptimal or of mixed lengths introduces additional costs and complexity while decreasing the final yield. The overall goal of this study was to demonstrate the utility of engineering Gram‐negative bacteria to produce homogenous O‐polysaccharide populations that can be used as the basis of carbohydrate vaccines by overexpressing O‐polysaccharide chain length regulators of the Wzx‐/Wzy‐dependent pathway. Method and Results The O‐polysaccharide chain length regulators wzzB and fepE from Salmonella Typhimurium I77 and wzz2 from Pseudomonas aeruginosa PAO1 were cloned and expressed in the homologous organism or in other Gram‐negative bacteria. Overexpression of these Wzz proteins in the homologous organism significantly increased the proportion of long or very long chain O‐polysaccharides. The same observation was made when wzzB was overexpressed in Salmonella Paratyphi A and Shigella flexneri, and wzz2 was overexpressed in two other strains of P. aeruginosa. Conclusions Overexpression of Wzz proteins in Gram‐negative bacteria using the Wzx/Wzy‐dependant pathway for lipopolysaccharide synthesis provides a genetic method to increase the production of an O‐polysaccharide population of a defined size. Significance and Impact of the Study The methods presented herein represent a cost‐effective and improved strategy for isolating preferred OPS vaccine haptens, and could facilitate the further use of O‐polysaccharides in glycoconjugate vaccine development.
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Affiliation(s)
- N Hegerle
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - J Bose
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - G Ramachandran
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - J E Galen
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - M M Levine
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - R Simon
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - S M Tennant
- Center for Vaccine Development and Institute for Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
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15
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Abstract
Drug resistance to our current stock of antibiotics is projected to increase to levels that threaten our ability to reduce and eliminate bacterial infections, which is now considered one of the primary health care crises of the 21st century. Traditional antibiotic agents (e.g., penicillin) paved the way for massive advances in human health, but we need novel strategies to maintain the upper hand in the battle against pathogenic bacteria. Nontraditional strategies, such as targeted immunotherapies, could prove fruitful in complementing our antibiotic arsenal.
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Affiliation(s)
- Mary J. Sabulski Feigman
- Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, Pennsylvania 18015, United States
| | - Marcos M. Pires
- Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, Pennsylvania 18015, United States
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16
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Gonzalez-Sapienza G, Rossotti MA, Tabares-da Rosa S. Single-Domain Antibodies As Versatile Affinity Reagents for Analytical and Diagnostic Applications. Front Immunol 2017; 8:977. [PMID: 28871254 PMCID: PMC5566570 DOI: 10.3389/fimmu.2017.00977] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 07/31/2017] [Indexed: 12/23/2022] Open
Abstract
With just three CDRs in their variable domains, the antigen-binding site of camelid heavy-chain-only antibodies (HcAbs) has a more limited structural diversity than that of conventional antibodies. Even so, this does not seem to limit their specificity and high affinity as HcAbs against a broad range of structurally diverse antigens have been reported. The recombinant form of their variable domain [nanobody (Nb)] has outstanding properties that make Nbs, not just an alternative option to conventional antibodies, but in many cases, these properties allow them to reach analytical or diagnostic performances that cannot be accomplished with conventional antibodies. These attributes include comprehensive representation of the immune specificity in display libraries, easy adaptation to high-throughput screening, exceptional stability, minimal size, and versatility as affinity building block. Here, we critically reviewed each of these properties and highlight their relevance with regard to recent developments in different fields of immunosensing applications.
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Affiliation(s)
| | - Martín A Rossotti
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Montevideo, Uruguay
| | - Sofía Tabares-da Rosa
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Montevideo, Uruguay
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17
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Fuhrmann J, Subramanian V, Thompson PR. Synthesis and Use of a Phosphonate Amidine to Generate an Anti-Phosphoarginine-Specific Antibody. Angew Chem Int Ed Engl 2015; 54:14715-8. [PMID: 26458230 DOI: 10.1002/anie.201506737] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/08/2015] [Indexed: 01/09/2023]
Abstract
Protein arginine phosphorylation is a post-translational modification (PTM) that is important for bacterial growth and virulence. Despite its biological relevance, the intrinsic acid lability of phosphoarginine (pArg) has impaired studies of this novel PTM. Herein, we report for the first time the development of phosphonate amidines and sulfonate amidines as isosteres of pArg and then use these mimics as haptens to develop the first high-affinity sequence independent anti-pArg specific antibody. Employing this anti-pArg antibody, we further showed that arginine phosphorylation is induced in Bacillus subtilis during oxidative stress. Overall, we expect this antibody to see widespread use in analyzing the biological significance of arginine phosphorylation. Additionally, the chemistry reported here will facilitate the generation of pArg mimetics as highly potent inhibitors of the enzymes that catalyze arginine phosphorylation/dephosphorylation.
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Affiliation(s)
- Jakob Fuhrmann
- Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, FL 33458 (USA).
| | - Venkataraman Subramanian
- Department of Biochemistry and Molecular Pharmacology, UMass Medical School, 364 Plantation Street, Worcester, MA 01605 (USA).,Chemical Biology Interface Program, UMass Medical School, 364 Plantation Street, Worcester, MA 01605 (USA)
| | - Paul R Thompson
- Department of Biochemistry and Molecular Pharmacology, UMass Medical School, 364 Plantation Street, Worcester, MA 01605 (USA). .,Chemical Biology Interface Program, UMass Medical School, 364 Plantation Street, Worcester, MA 01605 (USA).
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18
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Abstract
Haptens, such as dinitrophenyl (DNP) are small molecules that induce strong immune responses when attached to proteins or peptides and, as such, have been exploited for diverse applications. We engineered a Methanosarcina barkeri pyrrolysyl-tRNA synthetase (mbPylRS) to genetically encode a DNP-containing unnatural amino acid, N(6) -(2-(2,4-dinitrophenyl)acetyl)lysine (DnpK). Although this moiety was unstable in Escherichia coli, we found that its stability was enhanced in mammalian HEK 293T cells and was able to induce selective interactions with anti-DNP antibodies. The capability of genetically introducing DNP into proteins is expected to find broad applications in biosensing, immunology, and therapeutics.
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Affiliation(s)
- Wei Ren
- Department of Chemistry, University of California Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA
| | - Ao Ji
- Department of Chemistry, University of California Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA
| | - Michael X Wang
- Department of Chemistry, University of California Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA.,John W. North High School, 1550 3rd Street, Riverside, CA, 92507, USA
| | - Hui-wang Ai
- Department of Chemistry, University of California Riverside, 501 Big Springs Road, Riverside, CA, 92521, USA.
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19
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Li JR, Ross SS, Liu Y, Liu YX, Wang KH, Chen HY, Liu FT, Laurence TA, Liu GY. Engineered Nanostructures of Haptens Lead to Unexpected Formation of Membrane Nanotubes Connecting Rat Basophilic Leukemia Cells. ACS Nano 2015; 9:6738-6746. [PMID: 26057701 PMCID: PMC4758354 DOI: 10.1021/acsnano.5b02270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 06/04/2023]
Abstract
A recent finding reports that co-stimulation of the high-affinity immunoglobulin E (IgE) receptor (FcεRI) and the chemokine receptor 1 (CCR1) triggered formation of membrane nanotubes among bone-marrow-derived mast cells. The co-stimulation was attained using corresponding ligands: IgE binding antigen and macrophage inflammatory protein 1α (MIP1 α), respectively. However, this approach failed to trigger formation of nanotubes among rat basophilic leukemia (RBL) cells due to the lack of CCR1 on the cell surface (Int. Immunol. 2010, 22 (2), 113-128). RBL cells are frequently used as a model for mast cells and are best known for antibody-mediated activation via FcεRI. This work reports the successful formation of membrane nanotubes among RBLs using only one stimulus, a hapten of 2,4-dinitrophenyl (DNP) molecules, which are presented as nanostructures with our designed spatial arrangements. This observation underlines the significance of the local presentation of ligands in the context of impacting the cellular signaling cascades. In the case of RBL, certain DNP nanostructures suppress antigen-induced degranulation and facilitate the rearrangement of the cytoskeleton to form nanotubes. These results demonstrate an important scientific concept; engineered nanostructures enable cellular signaling cascades, where current technologies encounter great difficulties. More importantly, nanotechnology offers a new platform to selectively activate and/or inhibit desired cellular signaling cascades.
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Affiliation(s)
- Jie-Ren Li
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Shailise S. Ross
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Yang Liu
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Ying X. Liu
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Kang-hsin Wang
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Huan-Yuan Chen
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, California 95817, United States
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC
| | - Fu-Tong Liu
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, California 95817, United States
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC
| | - Ted A. Laurence
- Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Gang-yu Liu
- Department of Chemistry, University of California, Davis, California 95616, United States
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20
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Luo L, Xu ZL, Yang JY, Xiao ZL, Li YJ, Beier RC, Sun YM, Lei HT, Wang H, Shen YD. Synthesis of novel haptens and development of an enzyme-linked immunosorbent assay for quantification of histamine in foods. J Agric Food Chem 2014; 62:12299-12308. [PMID: 25417820 DOI: 10.1021/jf504689x] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Novel haptens were designed and synthesized to prepare antibodies against free histamine, but none resulted in producing suitable antibodies for developing an enzyme-linked immunosorbent assay (ELISA). However, an antiserum was obtained having high specificity and affinity to p-nitrobenzoylated histamine (NPHA), which can be easily formed from reaction between histamine and p-nitrobenzoic acid N-hydroxysuccinimide ester (PNBA-OSu) under mild conditions. Based on rabbit polyclonal antibodies, a competitive indirect ELISA (ciELISA) for histamine determination in foods was developed. After ciELISA and derivatization optimization, the assay showed good sensitivity, with limits of detection of 1.8 mg/kg, 93.6 μg/L, and 93.6 μg/kg in fish, red wine, and yoghurt, respectively, with negligible cross-reactivity with related biogenic amines and amino acids. Average recovery of histamine in fortified food samples ranged from 80.9% to 110.1% with coefficients of variation below 16.3%. Good correlation between the ciELISA and liquid chromatography-tandem mass spectrometry was obtained for spiked food samples.
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Affiliation(s)
- Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University , Guangzhou 510642, China
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21
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Vojdani A, Kharrazian D, Mukherjee PS. Elevated levels of antibodies against xenobiotics in a subgroup of healthy subjects. J Appl Toxicol 2014; 35:383-97. [PMID: 25042713 PMCID: PMC4365752 DOI: 10.1002/jat.3031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/15/2014] [Accepted: 04/27/2014] [Indexed: 12/27/2022]
Abstract
In spite of numerous research efforts, the exact etiology of autoimmune diseases remains largely unknown. Genetics and environmental factors, including xenobiotics, are believed to be involved in the induction of autoimmune disease. Some environmental chemicals, acting as haptens, can bind to a high-molecular-weight carrier protein such as human serum albumin (HSA), causing the immune system to misidentify self-tissue as an invader and launch an immune response against it, leading to autoimmunity. This study aimed to examine the percentage of blood samples from healthy donors in which chemical agents mounted immune challenges and produced antibodies against HSA-bound chemicals. The levels of specific antibodies against 12 different chemicals bound to HSA were measured by ELISA in serum from 400 blood donors. We found that 10% (IgG) and 17% (IgM) of tested individuals showed significant antibody elevation against aflatoxin-HSA adduct. The percentage of elevation against the other 11 chemicals ranged from 8% to 22% (IgG) and 13% to 18% (IgM). Performance of serial dilution and inhibition of the chemical–antibody reaction by specific antigens but not by non-specific antigens were indicative of the specificity of these antibodies. Although we lack information about chemical exposure in the tested individuals, detection of antibodies against various protein adducts may indicate chronic exposure to these chemical haptens in about 20% of the tested individuals. Currently the pathological significance of these antibodies in human blood is still unclear, and this protein adduct formation could be one of the mechanisms by which environmental chemicals induce autoimmune reactivity in a significant percentage of the population.
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Affiliation(s)
- Aristo Vojdani
- Immunosciences Lab., Inc., 822 S. Robertson Blvd., Ste. 312, Los Angeles, CA, 90035, USA
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22
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Abstract
In the group of urticaria, contact urticaria syndrome is a particular variety. In these patients, appearance of typical skin lesions is preceded by contact of the skin and mucous membranes with various inhaled allergens, nutrients or contact details. Furthermore, symptoms connected with contact urticaria syndrome are characterized by gradual, stepwise waveform, which can be easily generalized - patients may develop systemic symptoms similar to those found in the angioedema, asthma or anaphylactic shock. It is an attribute of contact urticaria syndrome in the course of which potentially life-threatening symptoms may develop after contact of the skin with the allergen. The underlying mechanisms are poorly understood; both immunological and non-immunological mechanisms are taken into account, therefore contact urticaria syndrome can be classified into two categories - allergic and non-allergic. An intriguing phenomenon seems to be the immediate reaction after exposure to low molecular weight allergens - haptens, such as metals, which are usually the cause of delayed allergic reactions. Diagnosis is based on clinical presentation indicating a coincidence of the onset of allergy with contract with allergen, and helpful exposure tests. Treatment consists of supportive antihistamines and corticosteroids - locally and systemically. In the case of anaphylaxis, appropriate treatment intensification of the integration of pressor amines and hydration is necessary. It is also regarded that prevention is advisable, which consists of relevant information to avoid situations connected with contact with well-known factors. In this paper we describe a case of a 57-year-old female admitted to the Department of Internal Medicine, Geriatrics and Allergology, Medical University in Wroclaw to undergo diagnostic tests of chronic urticaria and angioedema. According to information obtained from the clinical presentation and after the diagnostic procedures, contact urticaria syndrome due to exposure to metals was diagnosed.
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Affiliation(s)
- Krzysztof Gomułka
- Department of Internal Medicine, Geriatrics and Allergology, Medical University, Wroclaw, Poland. Head of Department: Prof. Bernard Panaszek MD, PhD
| | - Bernard Panaszek
- Department of Internal Medicine, Geriatrics and Allergology, Medical University, Wroclaw, Poland. Head of Department: Prof. Bernard Panaszek MD, PhD
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23
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El Ali Z, Gerbeix C, Hemon P, Esser PR, Martin SF, Pallardy M, Kerdine-Römer S. Allergic skin inflammation induced by chemical sensitizers is controlled by the transcription factor Nrf2. Toxicol Sci 2013; 134:39-48. [PMID: 23564646 DOI: 10.1093/toxsci/kft084] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Allergic contact dermatitis (ACD) is induced by low-molecular weight electrophilic chemicals and metal ions. Chemical contact sensitizers trigger reactive oxygen species production and provoke electrophilic stress, leading to the accumulation of the transcription factor nuclear-related factor 2 (Nrf2) in innate immune cell types. The objective of this work was to identify the role of Nrf2 in the regulation of ACD. We used the local lymph node assay (LLNA) and the mouse ear swelling test (MEST) to study the role of Nrf2 in both the sensitization and elicitation phase in nrf2 knockout (nrf2(-/-)) and wild-type (nrf2(+/+)) mice. Five chemicals were used: two compounds known to react with cysteine residues, 2,4-dinitrochlorobenzene (DNCB) and cinnamaldehyde (CinA); one sensitizer known to exhibit mixed reactivity to cysteine and lysine residues, isophorone diisocyanate; and one reacting specifically with lysine residues, trimellitic anhydride and croton oil, a well-known irritant. In the MEST assay, DNCB (1 and 2%) induced a significant increase in ear thickness in nrf2(-/-) compared with nrf2(+/+) mice, suggesting a role for Nrf2 in the control of the inflammatory process. When DNCB was used at 0.25 and 0.5% or when mice were treated with CinA, inflammation was found only in nrf2(-/-) mice. In the LLNA, all chemical sensitizers induced an increase of lymphocyte proliferation in nrf2(-/-) compared with nrf2(+/+) mice for the same chemical concentration. These results reveal an important role for Nrf2 in controlling ACD and lymphocyte proliferation in response to sensitizers.
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Affiliation(s)
- Zeina El Ali
- UnivSud, INSERM UMR-996, Faculty of Pharmacy, Châtenay-Malabry, France
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24
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Parikka K, Wähälä K. An expedient synthesis of 5-n-alkylresorcinols and novel 5-n-alkylresorcinol haptens. Beilstein J Org Chem 2009; 5:22. [PMID: 19590737 PMCID: PMC2707013 DOI: 10.3762/bjoc.5.22] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2009] [Accepted: 04/21/2009] [Indexed: 11/25/2022] Open
Abstract
The first synthesis of bioactive long alkyl chain 5-n-alkylresorcinols, present in whole grain products, by a novel modification of the Wittig reaction is described. All the main long chain 5-n-alkylresorcinols present in rye and wheat, including C(23) and C(25) analogues and haptens, which have not been previously prepared, were synthesised. Microwave-promoted reactions of a semi-stabilized ylid and alkanals in water gave good yields in both pressurized and open systems. An alternative microwave-promoted synthesis starting from non-stabilized alkyltriphenylphosphonium salts and 3,5-dimethoxybenzaldehyde worked as well. Aqueous media were suitable for the reactions even if the starting materials were not soluble in water. The 5-n-alkylresorcinols are potential biomarkers of whole grain intake, and the new hapten derivatives of 5-n-alkylresorcinols will open the way for the immunochemical detection techniques of alkylresorcinols.
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Affiliation(s)
- Kirsti Parikka
- Laboratory of Organic Chemistry, Department of Chemistry, P.O. Box 55, FIN-00014-University of Helsinki, Finland, tel. +358 9 191 50356, fax +358 9 191 50357
- (present address:) Department of Applied Chemistry and Microbiology, P.O. Box 27, FIN-00014-University of Helsinki, Finland
| | - Kristiina Wähälä
- Laboratory of Organic Chemistry, Department of Chemistry, P.O. Box 55, FIN-00014-University of Helsinki, Finland, tel. +358 9 191 50356, fax +358 9 191 50357
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25
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Rennert PD, Hochman PS, Flavell RA, Chaplin DD, Jayaraman S, Browning JL, Fu YX. Essential role of lymph nodes in contact hypersensitivity revealed in lymphotoxin-alpha-deficient mice. J Exp Med 2001; 193:1227-38. [PMID: 11390430 PMCID: PMC2193379 DOI: 10.1084/jem.193.11.1227] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Lymph nodes (LNs) are important sentinal organs, populated by circulating lymphocytes and antigen-bearing cells exiting the tissue beds. Although cellular and humoral immune responses are induced in LNs by antigenic challenge, it is not known if LNs are essential for acquired immunity. We examined immune responses in mice that lack LNs due to genetic deletion of lymphotoxin ligands or in utero blockade of membrane lymphotoxin. We report that LNs are absolutely required for generating contact hypersensitivity, a T cell-dependent cellular immune response induced by epicutaneous hapten. We show that the homing of epidermal Langerhans cells in response to hapten application is specifically directed to LNs, providing a cellular basis for this unique LN function. In contrast, the spleen cannot mediate contact hypersensitivity because antigen-bearing epidermal Langerhans cells do not access splenic white pulp. Finally, we formally demonstrate that LNs provide a unique environment essential for generating this acquired immune response by reversing the LN defect in lymphotoxin-alpha(-/)- mice, thereby restoring the capacity for contact hypersensitivity.
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Affiliation(s)
- P D Rennert
- Department of Immunology and Inflammation, Biogen, Incorporated, 14 Cambridge Center, Cambridge, MA 02142, USA.
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