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Zhang Y, Wu W, Li Q, Zhou P, Wen K, Shen J, Wang Z. The hapten rigidity improves antibody performances in immunoassay for rifamycins: Immunovalidation and molecular mechanism. J Hazard Mater 2024; 469:133977. [PMID: 38492395 DOI: 10.1016/j.jhazmat.2024.133977] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/24/2024] [Accepted: 03/05/2024] [Indexed: 03/18/2024]
Abstract
The immunogenicity of haptens determines the performance of the resultant antibody for small molecules. Rigidity is one of the basic physicochemical properties of haptens. However, few studies have investigated the effect of hapten rigidity on the strength of an immune response and overall antibody performance. Herein, we introduce three molecular descriptors that quantify hapten rigidity. By using of these descriptors, four rifamycin haptens with varied rigidity were designed. The structural and physicochemical feasibility of the designed haptens was then assessed by computational chemistry. Immunization demonstrated that the strength of induced immune responses, i.e., the titer and affinity of antiserum, was significantly increased with increased rigidity of haptens. Furthermore, molecular dynamic simulations demonstrated conformation constraint of rigid haptens contributed to the initial binding and activation of naïve B cells. Finally, a highly sensitive indirect competitive enzyme-linked immunosorbent assay was developed for detection of rifaximin, with an IC50 of 1.1 μg/L in buffer and a limit of detection of 0.2-11.3 μg/L in raw milk, river water, and soil samples. This work provides new insights into the effect of hapten rigidity on immunogenicity and offers new hapten design strategies for antibody discovery and vaccine development of small molecules.
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Affiliation(s)
- Yingjie Zhang
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Weilin Wu
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Qing Li
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Penghui Zhou
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Kai Wen
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Jianzhong Shen
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Zhanhui Wang
- National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China.
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Xu T, Hong A, Zhang X, Xu Y, Wang T, Zheng Q, Wei T, He Q, Ren Z, Qin T. Preparation and adjuvanticity against PCV 2 of Viola philippica polysaccharide loaded in Chitosan-Gold nanoparticle. Vaccine 2024; 42:2608-2620. [PMID: 38472066 DOI: 10.1016/j.vaccine.2024.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 02/26/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024]
Abstract
The present Porcine circovirus type 2 virus (PCV2) vaccine adjuvants suffer from numerous limitations, such as adverse effects, deficient cell-mediated immune responses, and inadequate antibody production. In this study, we explored the potential of a novel nanoparticle (CS-Au NPs) based on gold nanoparticles (Au NPs) and chitosan (CS) that modified Viola philippica polysaccharide (VPP) as efficient adjuvants for PCV2 vaccine. The characterization demonstrated that CS-Au-VPP NPs had a mean particle size of 507.42 nm and a zeta potential value of -21.93 mV. CS-Au-VPP NPs also exhibited good dispersion and a stable structure, which did not alter the polysaccharide properties. Additionally, the CS-Au-VPP NPs showed easy absorption and utilization by the organism. To investigate their immune-enhancing potential, mice were immunized with a mixture of CS-Au-VPP NPs and PCV2 vaccine. The evaluation of relevant immunological indicators, including specific IgG antibodies and their subclasses, cytokines, and T cell subpopulations, confirmed their immune-boosting effects. The in vivo experiments revealed that the medium-dose CS-Au-VPP NPs significantly elevated the levels of specific IgG antibodies and their subclasses, cytokines, and T cell subpopulations in PCV2-immunized mice. These findings suggest that CS-Au-VPP NPs can serve as a promising vaccine adjuvant due to their stable structure and immunoenhancement capabilities.
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Affiliation(s)
- Ting Xu
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Ancan Hong
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Xueli Zhang
- Fujian Key Laboratory of Chinese Traditional and Western Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Yizhou Xu
- Fujian Key Laboratory of Chinese Traditional and Western Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Tao Wang
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Qiang Zheng
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Tiantian Wei
- Fujian Key Laboratory of Chinese Traditional and Western Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Qiuyue He
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Zhe Ren
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China.
| | - Tao Qin
- Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health in Fujian Province, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China.
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