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Ahmed M, Kurungottu P, Swetha K, Atla S, Ashok N, Nagamalleswari E, Bonam SR, Sahu BD, Kurapati R. Role of NLRP3 inflammasome in nanoparticle adjuvant-mediated immune response. Biomater Sci 2024. [PMID: 38867716 DOI: 10.1039/d4bm00439f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
The nucleotide-binding oligomerization domain (NOD)-like receptor (NLR) family pyrin domain-containing 3 (NLRP3) inflammasome is pivotal in orchestrating the immune response induced by nanoparticle adjuvants. Understanding the intricate mechanisms underlying the activation of NLRP3 inflammasome by these adjuvants is crucial for deciphering their immunomodulatory properties. This review explores the involvement of the NLRP3 inflammasome in mediating immune responses triggered by nanoparticle adjuvants. It delves into the signaling pathways and cellular mechanisms involved in NLRP3 activation, highlighting its significance in modulating the efficacy and safety of nanoparticle-based adjuvants. A comprehensive grasp of the interplay between NLRP3 inflammasome and nanoparticle adjuvants holds promise for optimizing vaccine design and advancing immunotherapeutic strategies.
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Affiliation(s)
- Momitul Ahmed
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati 781101, India.
| | - Pavithra Kurungottu
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India.
| | - K Swetha
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India.
| | - Sandeep Atla
- Texas A&M Drug Discovery Center, Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Nivethitha Ashok
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India.
| | - Easa Nagamalleswari
- MTCC and Gene Bank, CSIR-Institute of Microbial Technology, Sector 39A, Chandigarh, 160036, India
| | - Srinivasa Reddy Bonam
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA.
| | - Bidya Dhar Sahu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati 781101, India.
| | - Rajendra Kurapati
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India.
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Badran G, Grare C, Masson JD, David MO, Achour D, Guidice JML, Garçon G, Crépeaux G. Difference in the cellular response following THP-1 derived phagocytic monocyte cells exposure to commercial aluminum-based adjuvants and aluminum-containing vaccines. J Trace Elem Med Biol 2024; 83:127394. [PMID: 38262194 DOI: 10.1016/j.jtemb.2024.127394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 01/12/2024] [Accepted: 01/12/2024] [Indexed: 01/25/2024]
Abstract
BACKGROUND Aluminum-based adjuvants (ABAs) enhance the immune response following vaccine injection. Their mechanisms of action are not fully understood, and their bio-persistency have been described associated with long-term adverse effects. METHODS We evaluated and compared the cellular effects of the two main ABAs and whole vaccines on ATP production, ROS generation and cytokines production (IL-6 and IL-10), using THP-1 cells. RESULTS ABAs altered the cell energy metabolism by increasing ROS production after 24 h and reducing ATP production after 48 h. In addition, both ABAs and whole vaccines induced different kinetics of IL-6 production, whereas only ABAs induced IL-10 secretion. CONCLUSION This study showed clearly, for a first time, a difference in cellular response to the ABAs and whole vaccines which should be taken into consideration in future studies focusing on the effect of ABA in vaccines. Future studies on ABAs should also pay attention to mitochondrial function alterations following exposure to ABA-containing vaccines.
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Affiliation(s)
- Ghidaa Badran
- Univ Paris Est Créteil, INSERM, IMRB, F-94010 Créteil, France.
| | - Céline Grare
- CHU Lille, Institut Pasteur de Lille, ULR 4483-IMPacts de l'Environnement Chimique sur la Santé (IMPECS), Univ. Lille, Lille, France
| | | | - Marie-Odile David
- Université Paris-Saclay, Inserm, Univ Evry, Structure-Activité des Biomolécules Normales et Pathologiques, U1204, 91025 Evry, France
| | - Djamal Achour
- CHU Lille, Institut Pasteur de Lille, ULR 4483-IMPacts de l'Environnement Chimique sur la Santé (IMPECS), Univ. Lille, Lille, France
| | - Jean-Marc Lo Guidice
- CHU Lille, Institut Pasteur de Lille, ULR 4483-IMPacts de l'Environnement Chimique sur la Santé (IMPECS), Univ. Lille, Lille, France
| | - Guillaume Garçon
- CHU Lille, Institut Pasteur de Lille, ULR 4483-IMPacts de l'Environnement Chimique sur la Santé (IMPECS), Univ. Lille, Lille, France
| | - Guillemette Crépeaux
- Univ Paris Est Créteil, INSERM, IMRB, F-94010 Créteil, France; Ecole Nationale Vétérinaire d'Alfort, IMRB, F-94700 Maisons-Alfort, France
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3
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Oladejo M, Tijani AO, Puri A, Chablani L. Adjuvants in cutaneous vaccination: A comprehensive analysis. J Control Release 2024; 369:475-492. [PMID: 38569943 DOI: 10.1016/j.jconrel.2024.03.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/15/2024] [Accepted: 03/26/2024] [Indexed: 04/05/2024]
Abstract
Skin is the body's largest organ and serves as a protective barrier from physical, thermal, and mechanical environmental challenges. Alongside, the skin hosts key immune system players, such as the professional antigen-presenting cells (APCs) like the Langerhans cells in the epidermis and circulating macrophages in the blood. Further, the literature supports that the APCs can be activated by antigen or vaccine delivery via multiple routes of administration through the skin. Once activated, the stimulated APCs drain to the associated lymph nodes and gain access to the lymphatic system. This further allows the APCs to engage with the adaptive immune system and activate cellular and humoral immune responses. Thus, vaccine delivery via skin offers advantages such as reliable antigen delivery, superior immunogenicity, and convenient delivery. Several preclinical and clinical studies have demonstrated the significance of vaccine delivery using various routes of administration via skin. However, such vaccines often employ adjuvant/(s), along with the antigen of interest. Adjuvants augment the immune response to a vaccine antigen and improve the therapeutic efficacy. Due to these reasons, adjuvants have been successfully used with infectious disease vaccines, cancer immunotherapy, and immune-mediated diseases. To capture these developments, this review will summarize preclinical and clinical study results of vaccine delivery via skin in the presence of adjuvants. A focused discussion regarding the FDA-approved adjuvants will address the experiences of using such adjuvant-containing vaccines. In addition, the challenges and regulatory concerns with these adjuvants will be discussed. Finally, the review will share the prospects of adjuvant-containing vaccines delivered via skin.
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Affiliation(s)
- Mariam Oladejo
- Department of Immunotherapeutics and Biotechnology, Jerry H Hodge School of Pharmacy, Texas Tech University Health Sciences Center, Abilene, TX 79601, USA
| | - Akeemat O Tijani
- Department of Pharmaceutical Sciences, Bill Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN, USA
| | - Ashana Puri
- Department of Pharmaceutical Sciences, Bill Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN, USA.
| | - Lipika Chablani
- Wegmans School of Pharmacy, St. John Fisher University, 3690 East Ave, Rochester, NY 14618, USA.
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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] [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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Zhang J, Wang K, Xu S, Chen L, Gu H, Yang Y, Zhao Q, Huo Y, Li B, Wang Y, Xie Y, Li N, Zhang J, Zhang J, Li Q. Silk Fibroin-Coated Nano-MOFs Enhance the Thermal Stability and Immunogenicity of HBsAg. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8346-8364. [PMID: 38323561 DOI: 10.1021/acsami.3c16358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Vaccines are widely regarded as one of the most effective weapons in the fight against infectious diseases. Currently, vaccines must be stored and transported at low temperatures as high temperatures can lead to a loss of vaccine conformation and reduced therapeutic efficacy. Metal-organic frameworks (MOFs), such as zeolitic imidazole framework-8 (ZIF-8), are a new class of hybrid materials with large specific surface areas, high loading rates, and good biocompatibility and are successful systems for vaccine delivery and protection. Silk fibroin (SF) has a good biocompatibility and thermal stability. In this study, the hepatitis B surface antigen (HBsAg) was successfully encapsulated in ZIF-8 to form HBsAg@ZIF-8 (HZ) using a one-step shake and one-pot shake method. Subsequently, the SF coating modifies HZ through hydrophobic interactions to form HBsAg/SF@ZIF-8 (HSZ), which enhanced the thermal stability and immunogenicity of HBsAg. Compared to free HBsAg, HZ and HSZ improved the thermostability of HBsAg, promoted the antigen uptake and lysosomal escape, stimulated dendritic cell maturation and cytokine secretion, formed an antigen reservoir to promote antibody production, and activated CD4+ T and CD8+ T cells to enhance memory T-cell production. Importantly, HSZ induced a strong immune response even after 14 days of storage at 25 °C. Furthermore, the nanoparticles prepared by the one-step shake method exhibited superior properties compared to those prepared by the one-pot shake method. This study highlights the importance of SF-coated ZIF-8, which holds promise for investigating thermostable vaccines and breaking the vaccine cold chain.
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Affiliation(s)
- Jiabin Zhang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Kai Wang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Shiyao Xu
- College of Life Sciences, Tonghua Normal University, Tonghua 134002, China
| | - Linlin Chen
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Haiquan Gu
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Yujie Yang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Qi Zhao
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Yurou Huo
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Bo Li
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Yufei Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Yubiao Xie
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Nan Li
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Jiali Zhang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun 130118, China
| | - Jianxu Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
| | - Qianxue Li
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun 130012, China
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Liu D, Fu L, Gong L, Li S, Li K, Liu K, Yang D. Proton-Gradient-Driven Porphyrin-Based Liposome Remote-Loaded with Imiquimod as In Situ Nanoadjuvants for Synergistically Augmented Tumor Photoimmunotherapy. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8403-8416. [PMID: 38334116 DOI: 10.1021/acsami.3c17133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Cancer immunotherapy is expected to achieve tumor treatment mainly by stimulating the patient's own immune system to kill tumor cells. However, the low immunogenicity of the tumor and the poor efficiency of tumor antigen presentation result in a variety of solid tumors that do not respond to immunotherapy. Herein, we designed a proton-gradient-driven porphyrin-based liposome (PBL) with highly efficient Toll-like receptor 7 (TLR7) agonist (imiquimod, R837) encapsulation (R837@PBL). R837@PBL rapidly released R837 in the acid microenvironment to activate the TLR in the endosome inner membrane to promote bone-marrow-derived dendritic cell maturation and enhance antigen presentation. R837@PBL upon laser irradiation triggered immunogenic cell death of tumor cells and tumor-associated antigen release after subcutaneous injection, activated TLR7, formed in situ tumor nanoadjuvants, and enhanced the antigen presentation efficiency. Photoimmunotherapy promoted the infiltration of cytotoxic T lymphocytes into tumor tissues, inhibited the growth of the treated and abscopal tumors, and exerted highly effective photoimmunotherapeutic effects. Hence, our designed in situ tumor nanoadjuvants are expected to be an effective treatment for treated and abscopal tumors, providing a novel approach for synergistic photoimmunotherapy of tumors.
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Affiliation(s)
- Dechun Liu
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Luyao Fu
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Linlin Gong
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Shasha Li
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Kunwei Li
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Kunhong Liu
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Dan Yang
- Department of Pharmaceutical Sciences, School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Weiyang University Park, Xi'an 710021, China
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Siram K, Lathrop SK, Abdelwahab WM, Tee R, Davison CJ, Partlow HA, Evans JT, Burkhart DJ. Co-Delivery of Novel Synthetic TLR4 and TLR7/8 Ligands Adsorbed to Aluminum Salts Promotes Th1-Mediated Immunity against Poorly Immunogenic SARS-CoV-2 RBD. Vaccines (Basel) 2023; 12:21. [PMID: 38250834 PMCID: PMC10818338 DOI: 10.3390/vaccines12010021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/15/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
Despite the availability of effective vaccines against COVID-19, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continues to spread worldwide, pressing the need for new vaccines with improved breadth and durability. We developed an adjuvanted subunit vaccine against SARS-CoV-2 using the recombinant receptor-binding domain (RBD) of spikes with synthetic adjuvants targeting TLR7/8 (INI-4001) and TLR4 (INI-2002), co-delivered with aluminum hydroxide (AH) or aluminum phosphate (AP). The formulations were characterized for the quantities of RBD, INI-4001, and INI-2002 adsorbed onto the respective aluminum salts. Results indicated that at pH 6, the uncharged RBD (5.73 ± 4.2 mV) did not efficiently adsorb to the positively charged AH (22.68 ± 7.01 mV), whereas it adsorbed efficiently to the negatively charged AP (-31.87 ± 0.33 mV). Alternatively, pre-adsorption of the TLR ligands to AH converted it to a negatively charged particle, allowing for the efficient adsorption of RBD. RBD could also be directly adsorbed to AH at a pH of 8.1, which changed the charge of the RBD to negative. INI-4001 and INI-2002 efficiently to AH. Following vaccination in C57BL/6 mice, both aluminum salts promoted Th2-mediated immunity when used as the sole adjuvant. Co-delivery with TLR4 and/or TLR7/8 ligands efficiently promoted a switch to Th1-mediated immunity instead. Measurements of viral neutralization by serum antibodies demonstrated that the addition of TLR ligands to alum also greatly improved the neutralizing antibody response. These results indicate that the addition of a TLR7/8 and/or TLR4 agonist to a subunit vaccine containing RBD antigen and alum is a promising strategy for driving a Th1 response and neutralizing antibody titers targeting SARS-CoV-2.
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Affiliation(s)
| | | | | | | | | | | | | | - David J. Burkhart
- Center for Translational Medicine, Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT 59812, USA; (K.S.); (S.K.L.); (W.M.A.); (R.T.); (C.J.D.); (H.A.P.); (J.T.E.)
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Laera D, HogenEsch H, O'Hagan DT. Aluminum Adjuvants-'Back to the Future'. Pharmaceutics 2023; 15:1884. [PMID: 37514070 PMCID: PMC10383759 DOI: 10.3390/pharmaceutics15071884] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/24/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Aluminum-based adjuvants will continue to be a key component of currently approved and next generation vaccines, including important combination vaccines. The widespread use of aluminum adjuvants is due to their excellent safety profile, which has been established through the use of hundreds of millions of doses in humans over many years. In addition, they are inexpensive, readily available, and are well known and generally accepted by regulatory agencies. Moreover, they offer a very flexible platform, to which many vaccine components can be adsorbed, enabling the preparation of liquid formulations, which typically have a long shelf life under refrigerated conditions. Nevertheless, despite their extensive use, they are perceived as relatively 'weak' vaccine adjuvants. Hence, there have been many attempts to improve their performance, which typically involves co-delivery of immune potentiators, including Toll-like receptor (TLR) agonists. This approach has allowed for the development of improved aluminum adjuvants for inclusion in licensed vaccines against HPV, HBV, and COVID-19, with others likely to follow. This review summarizes the various aluminum salts that are used in vaccines and highlights how they are prepared. We focus on the analytical challenges that remain to allowing the creation of well-characterized formulations, particularly those involving multiple antigens. In addition, we highlight how aluminum is being used to create the next generation of improved adjuvants through the adsorption and delivery of various TLR agonists.
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Affiliation(s)
- Donatello Laera
- Technical Research & Development, Drug Product, GSK, 53100 Siena, Italy
- Global Manufacturing Division, Corporate Industrial Analytics, Chiesi Pharmaceuticals, 43122 Parma, Italy
| | - Harm HogenEsch
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47906, USA
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Advances on the early cellular events occurring upon exposure of human macrophages to aluminum oxyhydroxide adjuvant. Sci Rep 2023; 13:3198. [PMID: 36823452 PMCID: PMC9950428 DOI: 10.1038/s41598-023-30336-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Aluminum compounds are the most widely used adjuvants in veterinary and human vaccines. Despite almost a century of use and substantial advances made in recent decades about their fate and biological effects, the exact mechanism of their action has been continuously debated, from the initial "depot-theory" to the direct immune system stimulation, and remains elusive. Here we investigated the early in vitro response of primary human PBMCs obtained from healthy individuals to aluminum oxyhydroxide (the most commonly used adjuvant) and a whole vaccine, in terms of internalization, conventional and non-conventional autophagy pathways, inflammation, ROS production, and mitochondrial metabolism. During the first four hours of contact, aluminum oxyhydroxide particles, with or without adsorbed vaccine antigen, (1) were quickly recognized and internalized by immune cells; (2) increased and balanced two cellular clearance mechanisms, i.e. canonical autophagy and LC3-associated phagocytosis; (3) induced an inflammatory response with TNF-α production as an early event; (4) and altered mitochondrial metabolism as assessed by both decreased maximal oxygen consumption and reduced mitochondrial reserve, thus potentially limiting further adaptation to other energetic requests. Further studies should consider a multisystemic approach of the cellular adjuvant mechanism involving interconnections between clearance mechanism, inflammatory response and mitochondrial respiration.
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Wei H, Li D, Luo Y, Wang Y, Lin E, Wei X. Aluminum exposure induces nephrotoxicity via fibrosis and apoptosis through the TGF-β1/Smads pathway in vivo and in vitro. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114422. [PMID: 36521267 DOI: 10.1016/j.ecoenv.2022.114422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/06/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Aluminum (Al), the most common element in nature, can enter the body through various routes. Unfortunately, excessive accumulation of Al in the body can cause chronic toxicity. In this study, rats were randomly allocated to 4 groups and intraperitoneally injected with AlCl3 solution at 0, 5, 10, and 20 mg/(kg·d), respectively, for 4 weeks. The kidney function of rats and Al contents in the kidney were measured, and the pathological structural changes and apoptosis of the kidney were observed. Meanwhile, the expression of fibrosis- and apoptosis-related proteins was detected with western blot. For the in vitro assay, HK-2 cells were used to construct a model to evaluate the effects of Al exposure on cell viability, cell apoptosis, and the expression of fibrosis- and apoptosis-related proteins. Additionally, the TGF-β1/Smads pathway was also altered in HK-2 cells, followed by the measurement of changes in apoptosis and fibrosis-related proteins. The results revealed that Al could accumulate in kidney tissues, then leading to histopathological changes and kidney function impairment, promoting renal tubular cell apoptosis and renal collagen fiber deposition, and also elevating the expression of TGF-β1/Smads pathway-related proteins. In vitro experiments also exhibited that Al exposure increased apoptosis and the expression of fibrosis-related factors in HK-2 cells, accompanied by activation of the TGF-β1/Smads pathway. Further modulation of the TGF-β1/Smads pathway manifested that activation of the TGF-β1/Smads pathway facilitated Al-induced apoptosis and fibrosis-related factor expression, while inhibition of the pathway negated this effect of Al. In conclusion, the findings of the present study illustrate that Al exposure damages kidney function and facilitate apoptosis and kidney fibrosis, which may be achieved through the activation of the TGF-β1/Smads pathway. This study provides a new theoretical basis for the study of nephrotoxicity induced by excessive Al exposure.
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Affiliation(s)
- Hua Wei
- Department of General Medicine, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China
| | - Dong Li
- Department of Oncology, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China
| | - Yueling Luo
- Department of Health Supervision Center, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China
| | - Yingchuan Wang
- Department of General Medicine, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China
| | - Erbing Lin
- Department of General Medicine, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China
| | - Xi Wei
- Department of Health Supervision Center, Affiliated Hospital of YouJiang Medical University for Nationalities, Zhongshan No 2 Road 18, Baise 533000, China.
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Carnet F, Perrin-Cocon L, Paillot R, Lotteau V, Pronost S, Vidalain PO. An inventory of adjuvants used for vaccination in horses: the past, the present and the future. Vet Res 2023; 54:18. [PMID: 36864517 PMCID: PMC9983233 DOI: 10.1186/s13567-023-01151-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 01/27/2023] [Indexed: 03/04/2023] Open
Abstract
Vaccination is one of the most widely used strategies to protect horses against pathogens. However, available equine vaccines often have limitations, as they do not always provide effective, long-term protection and booster injections are often required. In addition, research efforts are needed to develop effective vaccines against emerging equine pathogens. In this review, we provide an inventory of approved adjuvants for equine vaccines worldwide, and discuss their composition and mode of action when available. A wide range of adjuvants are used in marketed vaccines for horses, the main families being aluminium salts, emulsions, polymers, saponins and ISCOMs. We also present veterinary adjuvants that are already used for vaccination in other species and are currently evaluated in horses to improve equine vaccination and to meet the expected level of protection against pathogens in the equine industry. Finally, we discuss new adjuvants such as liposomes, polylactic acid polymers, inulin, poly-ε-caprolactone nanoparticles and co-polymers that are in development. Our objective is to help professionals in the horse industry understand the composition of marketed equine vaccines in a context of mistrust towards vaccines. Besides, this review provides researchers with a list of adjuvants, either approved or at least evaluated in horses, that could be used either alone or in combination to develop new vaccines.
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Affiliation(s)
- Flora Carnet
- grid.508204.bLABÉO, 14280 Saint-Contest, France ,grid.412043.00000 0001 2186 4076BIOTARGEN, Normandie University, UNICAEN, 14280 Saint-Contest, France
| | - Laure Perrin-Cocon
- grid.462394.e0000 0004 0450 6033CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Romain Paillot
- grid.451003.30000 0004 0387 5232School of Equine and Veterinary Physiotherapy, Writtle University College, Lordship Road, Writtle, Chelmsford, CM1 3RR UK
| | - Vincent Lotteau
- grid.462394.e0000 0004 0450 6033CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Stéphane Pronost
- LABÉO, 14280, Saint-Contest, France. .,BIOTARGEN, Normandie University, UNICAEN, 14280, Saint-Contest, France.
| | - Pierre-Olivier Vidalain
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, 69007, Lyon, France.
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Angrand L, Masson JD, Rubio-Casillas A, Nosten-Bertrand M, Crépeaux G. Inflammation and Autophagy: A Convergent Point between Autism Spectrum Disorder (ASD)-Related Genetic and Environmental Factors: Focus on Aluminum Adjuvants. TOXICS 2022; 10:toxics10090518. [PMID: 36136483 PMCID: PMC9502677 DOI: 10.3390/toxics10090518] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/19/2022] [Accepted: 08/25/2022] [Indexed: 05/10/2023]
Abstract
Autism spectrum disorder (ASD), schizophrenia, and bipolar disorder are genetically complex and heterogeneous neurodevelopmental disorders (NDDs) resulting from genetic factors and gene-environment (GxE) interactions for which onset occurs in early brain development. Recent progress highlights the link between ASD and (i) immunogenetics, neurodevelopment, and inflammation, and (ii) impairments of autophagy, a crucial neurodevelopmental process involved in synaptic pruning. Among various environmental factors causing risk for ASD, aluminum (Al)-containing vaccines injected during critical periods have received special attention and triggered relevant scientific questions. The aim of this review is to discuss the current knowledge on the role of early inflammation, immune and autophagy dysfunction in ASD as well as preclinical studies which question Al adjuvant impacts on brain and immune maturation. We highlight the most recent breakthroughs and the lack of epidemiological, pharmacokinetic and pharmacodynamic data constituting a "scientific gap". We propose additional research, such as genetic studies that could contribute to identify populations at genetic risk, improving diagnosis, and potentially the development of new therapeutic tools.
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Affiliation(s)
- Loïc Angrand
- Univ Paris Est Créteil, INSERM, IMRB, F-94010 Créteil, France; (L.A.); (J.-D.M.)
- Ecole Nationale Vétérinaire d’Alfort IMRB, F-94700 Maisons-Alfort, France
- INSERM UMR-S 1270, 75005 Paris, France;
- Sorbonne Université, Campus Pierre et Marie Curie, 75005 Paris, France
- Institut du Fer à Moulin, 75005 Paris, France
| | - Jean-Daniel Masson
- Univ Paris Est Créteil, INSERM, IMRB, F-94010 Créteil, France; (L.A.); (J.-D.M.)
- Ecole Nationale Vétérinaire d’Alfort IMRB, F-94700 Maisons-Alfort, France
| | - Alberto Rubio-Casillas
- Biology Laboratory, Autlán Regional Preparatory School, University of Guadalajara, Autlán 48900, Jalisco, Mexico;
- Autlán Regional Hospital, Health Secretariat, Autlán 48900, Jalisco, Mexico
| | - Marika Nosten-Bertrand
- INSERM UMR-S 1270, 75005 Paris, France;
- Sorbonne Université, Campus Pierre et Marie Curie, 75005 Paris, France
- Institut du Fer à Moulin, 75005 Paris, France
| | - Guillemette Crépeaux
- Univ Paris Est Créteil, INSERM, IMRB, F-94010 Créteil, France; (L.A.); (J.-D.M.)
- Ecole Nationale Vétérinaire d’Alfort IMRB, F-94700 Maisons-Alfort, France
- Correspondence:
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Masson JD, Angrand L, Badran G, de Miguel R, Crépeaux G. Clearance, biodistribution, and neuromodulatory effects of aluminum-based adjuvants. Systematic review and meta-analysis: what do we learn from animal studies? Crit Rev Toxicol 2022; 52:403-419. [PMID: 36112128 DOI: 10.1080/10408444.2022.2105688] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Aluminum (Al) salts are commonly used as adjuvants in human and veterinary vaccines for almost a century. Despite this long history of use and the very large number of exposed individuals, data in the literature concerning the fate of these molecules after injection and their potential effects on the nervous system is limited. In the context of (i) an increase of exposure to Al salts through vaccination; (ii) the absence of safety values determined by health regulators; (iii) the lack of robustness of the studies used as references to officially claim Al adjuvant innocuity; (iv) the publication of several animal studies investigating Al salts clearance/biopersistence and neurotoxicity; we have examined in this review all published studies performed on animals and assessing Al adjuvants kinetics, biodistribution, and neuromodulation since the first work of A. Glenny in the 1920s. The diversity of methodological approaches, results, and potential weaknesses of the 31 collected studies are exposed. A large range of protocols has been used, including a variety of exposure schedule and analyses methods, making comparisons between studies uneasy. Nevertheless, published data highlight that when biopersistence, translocation, or neuromodulation were assessed, they were documented whatever the different in vivo models and methods used. Moreover, the studies pointed out the crucial importance of the different Al adjuvant physicochemical properties and host genetic background on their kinetics, biodistribution, and neuromodulatory effects. Regarding the state of the art on this key public health topic, further studies are clearly needed to determine the exact safety level of Al salts.
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Affiliation(s)
- J-D Masson
- INSERM, IMRB, Univ Paris Est Créteil, Créteil, France
| | - L Angrand
- INSERM, IMRB, Univ Paris Est Créteil, Créteil, France.,École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France
| | - G Badran
- INSERM, IMRB, Univ Paris Est Créteil, Créteil, France.,Laboratoire SABNP, Université d'Evry Val d'Essonne, Paris, France
| | - R de Miguel
- Department of Animal Pathology, University of Zaragoza, Zaragoza, Spain
| | - G Crépeaux
- INSERM, IMRB, Univ Paris Est Créteil, Créteil, France.,École Nationale Vétérinaire d'Alfort, IMRB, Maisons-Alfort, France
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