1
|
Bo C, Wei X, Wang X, Ji W, Yang H, Zhao Y, Wang H. Physicochemical properties and adsorption state of aluminum adjuvants with different processes in vaccines. Heliyon 2023; 9:e18800. [PMID: 37560692 PMCID: PMC10407736 DOI: 10.1016/j.heliyon.2023.e18800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 07/17/2023] [Accepted: 07/27/2023] [Indexed: 08/11/2023] Open
Abstract
Aluminum salts are by far the most widely used adjuvants for human vaccines, showing acceptable safety and efficacy. Previous studies have shown that each aluminum adjuvant have different charges and morphologies, but whether the manufacturing and production processes affects the physicochemical properties of aluminum adjuvant has not yet been reported. In this study, we explored the physical and chemical properties of different aluminum adjuvants and Hib, sIPV antigens through particle size, zeta potential and morphological characteristics. The adsorption rate and efficacy were also investigated. The results showed that the preparation process had an impact on the physical and chemical properties of aluminum adjuvants, including differences in the particle size,zeta potential and morphological structure. Hib vaccine had larger particle size than sIPV vaccine with different aluminum adjuvants in the process of vaccine preparation. In addition, by measuring the adsorption rate, increasing the concentration of phosphate or Aluminum phosphate (AP) can improve the adsorption rate of Hib, but Aluminium hydroxide (AH) and amorphous aluminum hydroxyphosphate sulfate (AAHS) adjuvants are not affected. In vivo result showed that increasing the adsorption rate of Hib could enhance the Hib-IgG antibody titers. In conclusion, this study provides a reference for the application of adjuvants in vaccines by studying the physicochemical properties and adsorption conditions of different aluminum adjuvants and antigens.
Collapse
Affiliation(s)
| | | | - Xue Wang
- Beijing Institute of Biological Products Company Limited, Beijing 100176, China
| | - Wenheng Ji
- Beijing Institute of Biological Products Company Limited, Beijing 100176, China
| | - Huan Yang
- Beijing Institute of Biological Products Company Limited, Beijing 100176, China
| | - Yuxiu Zhao
- Beijing Institute of Biological Products Company Limited, Beijing 100176, China
| | - Hui Wang
- Beijing Institute of Biological Products Company Limited, Beijing 100176, China
| |
Collapse
|
2
|
Wang X, Feng Y, Zhang Q, Ye L, Cao M, Liu P, Liu S, Li S, Zhang J. Parental preference for Haemophilus influenzae type b vaccination in Zhejiang Province, China: A discrete choice experiment. Front Public Health 2022; 10:967693. [PMID: 36466507 PMCID: PMC9710483 DOI: 10.3389/fpubh.2022.967693] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2022] Open
Abstract
Background China is the only country in the world that has not included the Haemophilus influenzae type b (Hib) vaccine in its National Immunization Program, making it more difficult to eliminate Hib-related diseases through Hib vaccination. It is necessary to study parental preferences for Hib vaccination to optimize vaccine promotion strategies in China. Objective This study aimed to investigate Chinese parental preference for five attributes of Hib vaccination, i.e., the place of origin, effectiveness, adverse event, doctors' recommendation, and the price of full vaccination when making a decision to vaccinate their children under 2 years old. Methods A cross-sectional survey was conducted in two cities in Zhejiang Province from November to December in 2020 using a discrete choice experiment (DCE). A mixed logit model was used to estimate participating parents' preference for Hib vaccination attributes included in the DCE. Subgroup analysis and probability analysis were also conducted to capture the heterogeneity and trade-off of parental preference for Hib vaccination. Results Data from 6,168 observations were included in the analyses. Parents of children are, on average, more likely to voice a positive preference for Hib vaccination. Such attributes of Hib vaccination as effectiveness and doctor's recommendation have a significant positive influence on parents' preference for Hib vaccination, while imported vaccines, adverse events, and the price of full vaccination have a significant negative influence on parents' preference. Parents with different demographic characteristics also existed heterogeneities in preference for Hib vaccination. Parents will make a trade-off on price if the Hib vaccine has a good performance on effectiveness and safety. Conclusion The study found that, regardless of the place of origin of the Hib vaccine, parents with children under 2 years old prefer to compromise on price if the vaccine has a better effectiveness and safety profile. A proactive recommendation from doctors would strengthen their willingness for Hib vaccination. These findings help aid the development of communication strategies with parents for Hib vaccination in China.
Collapse
Affiliation(s)
- Xianglin Wang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China,School of Health Policy and Management, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Feng
- Business School, Sichuan University, Chengdu, China
| | - Qian Zhang
- Department of National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Lihong Ye
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Man Cao
- School of Health Policy and Management, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ping Liu
- Centre for Health Management and Policy Research, School of Public Health, Shandong University, Jinan, China
| | - Shimeng Liu
- School of Public Health, Fudan University, Shanghai, China,National Health Commission (NHC) Key Laboratory of Health Technology Assessment, Fudan University, Shanghai, China
| | - Shunping Li
- School of Health Care Management, Shandong University, Jinan, China,National Health Commission (NHC) Key Laboratory of Health, Economics and Policy Research (Shandong University), Jinan, China
| | - Juan Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China,*Correspondence: Juan Zhang
| |
Collapse
|
3
|
Wang N, Kong Y, Li J, Hu Y, Li X, Jiang S, Dong C. Synthesis and application of phosphorylated saccharides in researching carbohydrate-based drugs. Bioorg Med Chem 2022; 68:116806. [PMID: 35696797 DOI: 10.1016/j.bmc.2022.116806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 05/04/2022] [Accepted: 05/04/2022] [Indexed: 11/24/2022]
Abstract
Phosphorylated saccharides are valuable targets in glycochemistry and glycobiology, which play an important role in various physiological and pathological processes. The current research on phosphorylated saccharides primarily focuses on small molecule inhibitors, glycoconjugate vaccines and novel anti-tumour targeted drug carrier materials. It can maximise the pharmacological effects and reduce the toxicity risk caused by nonspecific off-target reactions of drug molecules. However, the number and types of natural phosphorylated saccharides are limited, and the complexity and heterogeneity of their structures after extraction and separation seriously restrict their applications in pharmaceutical development. The increasing demands for the research on these molecules have extensively promoted the development of carbohydrate synthesis. Numerous innovative synthetic methodologies have been reported regarding the continuous expansion of the potential building blocks, catalysts, and phosphorylation reagents. This review summarizes the latest methods for enzymatic and chemical synthesis of phosphorylated saccharides, emphasizing their breakthroughs in yield, reactivity, regioselectivity, and application scope. Additionally, the anti-bacterial, anti-tumour, immunoregulatory and other biological activities of some phosphorylated saccharides and their applications were also reviewed. Their structure-activity relationship and mechanism of action were discussed and the key phosphorylation characteristics, sites and extents responsible for observed biological activities were emphasised. This paper will provide a reference for the application of phosphorylated saccharide in the research of carbohydrate-based drugs in the future.
Collapse
Affiliation(s)
- Ning Wang
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Yuanfang Kong
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Jieming Li
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Yulong Hu
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Xiaofei Li
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Shiqing Jiang
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China
| | - Chunhong Dong
- Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China; Henan Polysaccharide Research Center, Zhengzhou 450046, Henan, China; Henan Key Laboratory of Chinese Medicine for Polysaccharides and Drugs Research, Zhengzhou 450046, Henan, China.
| |
Collapse
|
4
|
Xirogianni A, Georgakopoulou T, Patsourakos V, Magaziotou I, Papandreou A, Simantirakis S, Tzanakaki G. Impact of a Single-Tube PCR Assay for the Detection of Haemophilus influenzae Serotypes a, c, d, e and f on the Epidemiological Surveillance in Greece. Microorganisms 2022; 10:microorganisms10071367. [PMID: 35889086 PMCID: PMC9322709 DOI: 10.3390/microorganisms10071367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 12/07/2022] Open
Abstract
Background: The decrease in the rate of meningitis due to Haemophilus influenzae type b after vaccine introduction and a possible change in epidemiology of H. influenzae disease highlights the need for continuous serotype surveillance. Methods: A single-tube multiplex PCR assay for serotyping of H. influenzae was developed and deployed. Results: During 2003−2020, 108 meningitis cases due to H. influenzae were notified; 86 (80%) were confirmed and serotyped by molecular methods. The overall specificity and sensitivity of the assay were estimated (100% PPV and NPV respectively). The overall mean annual reported incidence for H. influenzae was 0.02, while for Hib and non-b meningitis equaled 0.02 and 0.03 per 100 000, respectively. Analysis by age group revealed that H. influenzae peaks in toddlers and children 0−4 years and in adults >45 years old. Among the serotyped cases, 39.8% were identified as Hib, 46.3% as NTHi, and 0.9% and 2.8% as serotypes a (Hia) and f (Hif)) respectively. Conclusions: Low incidence due to Hib was observed while non-typeable H. influenzae (NTHi) and serotypes Hia and Hif seem to emerge. The application of the current assay discloses the ongoing change of invasive H. influenzae disease trends during the Hib post-vaccine era.
Collapse
Affiliation(s)
- Athanasia Xirogianni
- National Meningitis Reference Laboratory, Department of Public Health Policy, School of Public Health, University of West Attica, 11521 Athens, Greece; (A.X.); (V.P.); (A.P.); (S.S.)
| | - Theano Georgakopoulou
- Department of Vaccine Preventable Diseases, National Public Health Organization (NPHO), 15123 Athens, Greece; (T.G.); (I.M.)
| | - Vassileios Patsourakos
- National Meningitis Reference Laboratory, Department of Public Health Policy, School of Public Health, University of West Attica, 11521 Athens, Greece; (A.X.); (V.P.); (A.P.); (S.S.)
| | - Ioanna Magaziotou
- Department of Vaccine Preventable Diseases, National Public Health Organization (NPHO), 15123 Athens, Greece; (T.G.); (I.M.)
| | - Anastasia Papandreou
- National Meningitis Reference Laboratory, Department of Public Health Policy, School of Public Health, University of West Attica, 11521 Athens, Greece; (A.X.); (V.P.); (A.P.); (S.S.)
| | - Stelmos Simantirakis
- National Meningitis Reference Laboratory, Department of Public Health Policy, School of Public Health, University of West Attica, 11521 Athens, Greece; (A.X.); (V.P.); (A.P.); (S.S.)
| | - Georgina Tzanakaki
- National Meningitis Reference Laboratory, Department of Public Health Policy, School of Public Health, University of West Attica, 11521 Athens, Greece; (A.X.); (V.P.); (A.P.); (S.S.)
- Correspondence: ; Tel.: +30-213-20-10-267
| |
Collapse
|