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An Overview of Nanocarrier-Based Adjuvants for Vaccine Delivery. Pharmaceutics 2021; 13:pharmaceutics13040455. [PMID: 33801614 PMCID: PMC8066039 DOI: 10.3390/pharmaceutics13040455] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/17/2021] [Accepted: 03/20/2021] [Indexed: 12/12/2022] Open
Abstract
The development of vaccines is one of the most significant medical accomplishments which has helped to eradicate a large number of diseases. It has undergone an evolutionary process from live attenuated pathogen vaccine to killed whole organisms or inactivated toxins (toxoids), each of them having its own advantages and disadvantages. The crucial parameters in vaccination are the generation of memory response and protection against infection, while an important aspect is the effective delivery of antigen in an intelligent manner to evoke a robust immune response. In this regard, nanotechnology is greatly contributing to developing efficient vaccine adjuvants and delivery systems. These can protect the encapsulated antigen from the host’s in-vivo environment and releasing it in a sustained manner to induce a long-lasting immunostimulatory effect. In view of this, the present review article summarizes nanoscale-based adjuvants and delivery vehicles such as viral vectors, virus-like particles and virosomes; non-viral vectors namely nanoemulsions, lipid nanocarriers, biodegradable and non-degradable nanoparticles, calcium phosphate nanoparticles, colloidally stable nanoparticles, proteosomes; and pattern recognition receptors covering c-type lectin receptors and toll-like receptors.
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Overcoming the intestinal barrier: A look into targeting approaches for improved oral drug delivery systems. J Control Release 2020; 322:486-508. [DOI: 10.1016/j.jconrel.2020.04.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 12/17/2022]
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Singh B, Maharjan S, Sindurakar P, Cho KH, Choi YJ, Cho CS. Needle-Free Immunization with Chitosan-Based Systems. Int J Mol Sci 2018; 19:E3639. [PMID: 30463211 PMCID: PMC6274840 DOI: 10.3390/ijms19113639] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/10/2018] [Accepted: 11/12/2018] [Indexed: 02/02/2023] Open
Abstract
Despite successful use, needle-based immunizations have several issues such as the risk of injuries and infections from the reuse of needles and syringes and the low patient compliance due to pain and fear of needles during immunization. In contrast, needle-free immunizations have several advantages including ease of administration, high level of patient compliance and the possibility of mass vaccination. Thus, there is an increasing interest on developing effective needle-free immunizations via cutaneous and mucosal approaches. Here, we discuss several methods of needle-free immunizations and provide insights into promising use of chitosan systems for successful immunization.
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Affiliation(s)
- Bijay Singh
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
- Research Institute for Bioscience and Biotechnology, Kathmandu 44600, Nepal.
| | - Sushila Maharjan
- Research Institute for Bioscience and Biotechnology, Kathmandu 44600, Nepal.
- Division of Engineering in Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.
| | - Princy Sindurakar
- Department of Biology, College of the Holy Cross, Worcester, MA 01610, USA.
| | - Ki-Hyun Cho
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH 44195, USA.
| | - Yun-Jaie Choi
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Chong-Su Cho
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
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Singh B, Maharjan S, Cho KH, Cui L, Park IK, Choi YJ, Cho CS. Chitosan-based particulate systems for the delivery of mucosal vaccines against infectious diseases. Int J Biol Macromol 2018; 110:54-64. [DOI: 10.1016/j.ijbiomac.2017.10.101] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/23/2017] [Accepted: 10/11/2017] [Indexed: 12/22/2022]
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Date AA, Hanes J, Ensign LM. Nanoparticles for oral delivery: Design, evaluation and state-of-the-art. J Control Release 2016; 240:504-526. [PMID: 27292178 DOI: 10.1016/j.jconrel.2016.06.016] [Citation(s) in RCA: 258] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 02/06/2023]
Abstract
The oral route is a preferred method of drug administration, though achieving effective drug delivery and minimizing off-target side effects is often challenging. Formulation into nanoparticles can improve drug stability in the harsh gastrointestinal (GI) tract environment, providing opportunities for targeting specific sites in the GI tract, increasing drug solubility and bioavailability, and providing sustained release in the GI tract. However, the unique and diverse physiology throughout the GI tract, including wide variation in pH, mucus that varies in thickness and structure, numerous cell types, and various physiological functions are both a barrier to effective delivery and an opportunity for nanoparticle design. Here, nanoparticle design aspects to improve delivery to particular sites in the GI tract are discussed. We then review new methods for evaluating oral nanoparticle formulations, including a short commentary on data interpretation and translation. Finally, the state-of-the-art in preclinical targeted nanoparticle design is reviewed.
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Affiliation(s)
- Abhijit A Date
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA
| | - Justin Hanes
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA; Departments of Biomedical Engineering, Environmental and Health Sciences, Oncology, Neurosurgery, Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Laura M Ensign
- The Center for Nanomedicine, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21231, USA; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N. Broadway, Baltimore, MD 21231, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA.
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Gamazo C, Martín-Arbella N, Brotons A, Camacho AI, Irache JM. Mimicking microbial strategies for the design of mucus-permeating nanoparticles for oral immunization. Eur J Pharm Biopharm 2015; 96:454-63. [PMID: 25615880 PMCID: PMC7126451 DOI: 10.1016/j.ejpb.2015.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 01/07/2015] [Accepted: 01/12/2015] [Indexed: 02/06/2023]
Abstract
Dealing with mucosal delivery systems means dealing with mucus. The name mucosa comes from mucus, a dense fluid enriched in glycoproteins, such as mucin, which main function is to protect the delicate mucosal epithelium. Mucus provides a barrier against physiological chemical and physical aggressors (i.e., host secreted digestive products such as bile acids and enzymes, food particles) but also against the potentially noxious microbiota and their products. Intestinal mucosa covers 400m(2) in the human host, and, as a consequence, is the major portal of entry of the majority of known pathogens. But, in turn, some microorganisms have evolved many different approaches to circumvent this barrier, a direct consequence of natural co-evolution. The understanding of these mechanisms (known as virulence factors) used to interact and/or disrupt mucosal barriers should instruct us to a rational design of nanoparticulate delivery systems intended for oral vaccination and immunotherapy. This review deals with this mimetic approach to obtain nanocarriers capable to reach the epithelial cells after oral delivery and, in parallel, induce strong and long-lasting immune and protective responses.
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Affiliation(s)
- Carlos Gamazo
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - Nekane Martín-Arbella
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Ana Brotons
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain
| | - Ana I Camacho
- Department of Microbiology, University of Navarra, Pamplona, Spain
| | - J M Irache
- Department of Pharmacy and Pharmaceutical Technology, University of Navarra, Pamplona, Spain.
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Davitt CJ, Lavelle EC. Delivery strategies to enhance oral vaccination against enteric infections. Adv Drug Deliv Rev 2015; 91:52-69. [PMID: 25817337 DOI: 10.1016/j.addr.2015.03.007] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/25/2015] [Accepted: 03/12/2015] [Indexed: 01/22/2023]
Abstract
While the majority of human pathogens infect the body through mucosal sites, most licensed vaccines are injectable. In fact the only mucosal vaccine that has been widely used globally for infant and childhood vaccination programs is the oral polio vaccine (OPV) developed by Albert Sabin in the 1950s. While oral vaccines against Cholera, rotavirus and Salmonella typhi have also been licensed, the development of additional non-living oral vaccines against these and other enteric pathogens has been slow and challenging. Mucosal vaccines can elicit protective immunity at the gut mucosa, in part via antigen-specific secretory immunoglobulin A (SIgA). However, despite their advantages over the injectable route, oral vaccines face many hurdles. A key challenge lies in design of delivery strategies that can protect antigens from degradation in the stomach and intestine, incorporate appropriate immune-stimulatory adjuvants and control release at the appropriate gastrointestinal site. A number of systems including micro and nanoparticles, lipid-based strategies and enteric capsules have significant potential either alone or in advanced combined formulations to enhance intestinal immune responses. In this review we will outline the opportunities, challenges and potential delivery solutions to facilitate the development of improved oral vaccines for infectious enteric diseases.
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Situ W, Li X, Liu J, Chen L. Preparation and characterization of glycoprotein-resistant starch complex as a coating material for oral bioadhesive microparticles for colon-targeted polypeptide delivery. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:4138-4147. [PMID: 25865827 DOI: 10.1021/acs.jafc.5b00393] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
For effective oral delivery of polypeptide or protein and enhancement their oral bioavailability, a new resistant starch-glycoprotein complex bioadhesive carrier and an oral colon-targeted bioadhesive delivery microparticle system were developed. A glycoprotein, concanavalin A (Con A), was successfully conjugated to the molecules of resistant starch acetate (RSA), leading to the formation of resistant starch-glycoprotein complex. This Con A-conjugated RSA film as a coating material showed an excellent controlled-release property. In streptozotocin (STZ)-induced type II diabetic rats, the insulin-loaded microparticles coated with this Con A-conjugated RSA film exhibited good hypoglycemic response for keeping the plasma glucose level within the normal range for totally 44-52 h after oral administration with different insulin dosages. Oral glucose tolerance tests indicated that successive oral administration of these colon-targeted bioadhesive microparticles with insulin at a level of 50 IU/kg could achieve a hypoglycemic effect similar to that by injection of insulin at 35 IU/kg. Therefore, the potential of this new Con A-conjugated RSA film-coated microparticle system has been demonstrated to be capable of improving the oral bioavailability of bioactive proteins and peptides.
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Gupta PN. Mucosal Vaccine Delivery and M Cell Targeting. ADVANCES IN DELIVERY SCIENCE AND TECHNOLOGY 2015. [DOI: 10.1007/978-3-319-11355-5_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Misstear K, McNeela EA, Murphy AG, Geoghegan JA, O'Keeffe KM, Fox J, Chan K, Heuking S, Collin N, Foster TJ, McLoughlin RM, Lavelle EC. Targeted nasal vaccination provides antibody-independent protection against Staphylococcus aureus. J Infect Dis 2013; 209:1479-84. [PMID: 24273045 DOI: 10.1093/infdis/jit636] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Despite showing promise in preclinical models, anti-Staphylococcus aureus vaccines have failed in clinical trials. To date, approaches have focused on neutralizing/opsonizing antibodies; however, vaccines exclusively inducing cellular immunity have not been studied to formally test whether a cellular-only response can protect against infection. We demonstrate that nasal vaccination with targeted nanoparticles loaded with Staphylococcus aureus antigen protects against acute systemic S. aureus infection in the absence of any antigen-specific antibodies. These findings can help inform future developments in staphylococcal vaccine development and studies into the requirements for protective immunity against S. aureus.
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des Rieux A, Pourcelle V, Cani PD, Marchand-Brynaert J, Préat V. Targeted nanoparticles with novel non-peptidic ligands for oral delivery. Adv Drug Deliv Rev 2013; 65:833-44. [PMID: 23454185 DOI: 10.1016/j.addr.2013.01.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 01/12/2013] [Accepted: 01/30/2013] [Indexed: 12/31/2022]
Abstract
Orally administered targeted nanoparticles have a large number of potential biomedical applications and display several putative advantages for oral drug delivery, such as the protection of fragile drugs or modification of drug pharmacokinetics. These advantages notwithstanding, oral drug delivery by nanoparticles remains challenging. The optimization of particle size and surface properties and targeting by ligand grafting have been shown to enhance nanoparticle transport across the intestinal epithelium. Here, different grafting strategies for non-peptidic ligands, e.g., peptidomimetics, lectin mimetics, sugars and vitamins, that are stable in the gastrointestinal tract are discussed. We demonstrate that the grafting of these non-peptidic ligands allows nanoparticles to be targeted to M cells, enterocytes, immune cells or L cells. We show that these grafted nanoparticles could be promising vehicles for oral vaccination by targeting M cells or for the delivery of therapeutic proteins. We suggest that targeting L cells could be useful for the treatment of type 2 diabetes or obesity.
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Intestinal receptor targeting for peptide delivery: an expert's personal perspective on reasons for failure and new opportunities. Ther Deliv 2012; 2:1575-93. [PMID: 22833983 DOI: 10.4155/tde.11.129] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The technology has been available more than 25 years that would enable the oral delivery of vaccines, proteins and peptides, thus avoiding the need for injection. To this day, injection is still the mode of delivery, yet not the main mode of choice. This review focuses on several of the potential modes for oral delivery of peptides, proteins and vaccines. Additionally, the review will provide the reader with an insight into the problems and potential solutions for several of these modes of oral delivery of peptides and proteins.
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Abstract
Immunotherapy, in recent times, has found its application in a variety of immunologically mediated diseases. Oral immunotherapy may not only increase patient compliance but may, in particular, also induce both systemic as well as mucosal immune responses, due to mucosal application of active agents. To improve the bioavailability and to trigger strong immunological responses, recent research projects focused on the encapsulation of drugs and antigens into polymer particles. These particles protect the loaded antigen from the harsh conditions in the GI tract. Furthermore, modification of the surface of particles by the use of lectins, such as Aleuria aurantia lectin, wheatgerm agglutinin or Ulex europaeus-I, enhances the binding to epithelial cells, in particular to membranous cells, of the mucosa-associated lymphoid tissue. Membranous cell-specific targeting leads to an improved transepithelial transport of the particle carriers. Thus, enhanced uptake and presentation of the encapsulated antigen by antigen-presenting cells favor strong systemic, but also local, mucosal immune responses.
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Crossing the barrier: Targeting epithelial receptors for enhanced oral vaccine delivery. J Control Release 2012; 160:431-9. [DOI: 10.1016/j.jconrel.2012.02.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 02/02/2012] [Indexed: 01/09/2023]
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Kunisawa J, Kurashima Y, Kiyono H. Gut-associated lymphoid tissues for the development of oral vaccines. Adv Drug Deliv Rev 2012; 64:523-30. [PMID: 21827802 DOI: 10.1016/j.addr.2011.07.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 06/23/2011] [Accepted: 07/10/2011] [Indexed: 01/22/2023]
Abstract
Oral vaccine has been considered to be a prospective vaccine against many pathogens especially invading across gastrointestinal tracts. One key element of oral vaccine is targeting efficient delivery of antigen to gut-associated lymphoid tissue (GALT), the inductive site in the intestine where antigen-specific immune responses are initiated. Various chemical and biological antigen delivery systems have been developed and some are in clinical trials. In this review, we describe the immunological features of GALT and the current status of antigen delivery system candidates for successful oral vaccine.
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Affiliation(s)
- Jun Kunisawa
- Division of Mucosal Immunology, Department of Microbiology and Immunology, Institute of Medical Science, The University of Tokyo, Japan.
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McNeela EA, Lavelle EC. Recent Advances in Microparticle and Nanoparticle Delivery Vehicles for Mucosal Vaccination. Curr Top Microbiol Immunol 2011; 354:75-99. [DOI: 10.1007/82_2011_140] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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17
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Kim SH, Seo KW, Kim J, Lee KY, Jang YS. The M cell-targeting ligand promotes antigen delivery and induces antigen-specific immune responses in mucosal vaccination. THE JOURNAL OF IMMUNOLOGY 2010; 185:5787-95. [PMID: 20952686 DOI: 10.4049/jimmunol.0903184] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oral mucosal immunization can induce protective immunity in both systemic compartments and the mucosa. Successful mucosal immunization depends on Ag delivery to the mucosal immune induction site. The high transcytotic activity of M cells within the mucosa makes these cells attractive targets for mucosal Ag delivery, although it remains unclear whether delivery of Ag to M cells only can guarantee the induction of effective immune responses. In this study, we evaluated the ability of an M cell-targeting ligand with adjuvant activity to induce immunity against ligand-fused Ag. We selected M cell-targeting ligands through biopanning of a phage display library against differentiated in vitro M-like cells and produced the recombinant Ags fused to the selected ligands using the model Ag. One of the selected peptide ligands, Co1, promoted the binding of ligand-fused Ag to mouse Peyer's patch M cells and human M-like cells that had been defined by binding with the M cell-specific and anti-GP2 Abs. In addition, Co1 ligand enhanced the uptake of fused Ag by immunogenic tissue in an ex vivo loop assay and in vivo oral administration experiments. After oral administration, the ligand-fused Ag enhanced immune responses against the fused Ag compared with those of the control Ag without ligand. In addition, this use of the ligand supported a skewed Th2-type immune response against the fused Ag. Collectively, these results suggest that the ligand selected through biopanning against cultured M-like cells could be used as an adjuvant for targeted Ag delivery into the mucosal immune system to enhance immune induction.
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Affiliation(s)
- Sae-Hae Kim
- Division of Biological Sciences, Chonbuk National University, Jeonju, South Korea
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Singh RS, Bhari R, Kaur HP. Mushroom lectins: current status and future perspectives. Crit Rev Biotechnol 2010; 30:99-126. [PMID: 20105049 DOI: 10.3109/07388550903365048] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Lectins are nonimmune proteins or glycoproteins that bind specifically to cell surface carbohydrates, culminating in cell agglutination. These are known to play key roles in host defense system and also in metastasis. Many new sources have been explored for the occurrence of lectins during the last few years. Numerous novel lectins with unique specificities and exploitable properties have been discovered. Mushrooms have attracted a number of researchers in food and pharmaceuticals. Many species have long been used in traditional Chinese medicines or functional foods in Japan and other Asian countries. A number of bioactive constituents have been isolated from mushrooms including polysaccharides, polysaccharopeptides, polysaccharide-protein complexes, proteases, ribonucleases, ribosome inactivating proteins, antifungal proteins, immunomodulatory proteins, enzymes, lectins, etc. Mushroom lectins are endowed with mitogenic, antiproliferative, antitumor, antiviral, and immune stimulating potential. In this review, an attempt has been made to collate the information on mushroom lectins, their blood group and sugar specificities, with an emphasis on their biomedical potential and future perspectives.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala, Punjab, India.
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Misumi S, Masuyama M, Takamune N, Nakayama D, Mitsumata R, Matsumoto H, Urata N, Takahashi Y, Muneoka A, Sukamoto T, Fukuzaki K, Shoji S. Targeted delivery of immunogen to primate m cells with tetragalloyl lysine dendrimer. THE JOURNAL OF IMMUNOLOGY 2009; 182:6061-70. [PMID: 19414757 DOI: 10.4049/jimmunol.0802928] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Effective uptake of Ags by specialized M cells of gut-associated lymphoid tissues is an important step in inducing efficient immune responses after oral vaccination. Although stable nontoxic small molecule mimetics of lectins, such as synthetic multivalent polygalloyl derivatives, may have potential in murine M cell targeting, it remains unclear whether synthetic multivalent polygalloyl derivatives effectively target nonhuman and human M cells. In this study, we evaluated the ability of a tetragalloyl derivative, the tetragalloyl-D-lysine dendrimer (TGDK), to target M cells in both in vivo nonhuman primate and in vitro human M-like cell culture models. TGDK was efficiently transported from the lumen of the intestinal tract into rhesus Peyer's patches by M cells and then accumulated in germinal centers. Oral administration of rhesus CCR5-derived cyclopeptide conjugated with TGDK in rhesus macaque resulted in a statistically significant increase in stool IgA response against rhesus CCR5-derived cyclopeptide and induced a neutralizing activity against SIV infection. Furthermore, TGDK was specifically bound to human M-like cells and efficiently transcytosed from the apical side to the basolateral side in the M-like cell model. Thus, the TGDK-mediated vaccine delivery system represents a potential approach for enabling M cell-targeted mucosal vaccines in primates.
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Affiliation(s)
- Shogo Misumi
- Department of Pharmaceutical Biochemistry, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
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Abstract
BACKGROUND M (microfold or membranous) cells are specialised epithelial cells responsible for antigen sampling at the interface of mucosal surfaces and the environment. Their high transcytotic ability make M cells an attractive target for mucosally delivered vaccines and therapeutics. OBJECTIVE This brief review discusses the current state of M cell-targeted mucosal delivery systems and the potential of such delivery systems for the development of new vaccines and therapeutics against mucosal infectious and inflammatory diseases. SCOPE A variety of synthetic microparticles/nanoparticles have been developed and tested as vehicles for M cell-targeted mucosal drug and vaccine delivery. beta1 integrins, pathogen recognition receptors, specific carbohydrate residues and other M cell surface antigens have been exploited as potential targets for the delivery of mucosal vaccines and therapeutics. CONCLUSION Despite a considerable body of literature, much work still needs to be done before an effective M cell-targeted vaccine or therapeutic is developed.
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Affiliation(s)
- Rhonda Kuolee
- Institute for Biological Sciences, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
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Abstract
Nonreplicating antigens are poorly immunogenic when given orally, either due to their degradation in the gastrointestinal tract or because they are not efficiently taken up in the gut. Studies in laboratory animals have clearly demonstrated that microparticles can significantly improve the immunogenicity of orally administered antigens. However, the oral delivery of vaccines using microparticles has not been explored extensively in humans and large animals. In this article the progress in oral microparticle antigen delivery will be reviewed and, where possible, studies in humans and large animals will be highlighted. In addition, possible approaches that have the potential to significantly improve microparticle delivery of oral vaccines will be suggested.
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Affiliation(s)
- George Mutwiri
- Vaccine & Infectious Disease Organization, Saskatoon, Canada.
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Brayden DJ, Jepson MA, Baird AW. Keynote review: Intestinal Peyer's patch M cells and oral vaccine targeting. Drug Discov Today 2005; 10:1145-57. [PMID: 16182207 DOI: 10.1016/s1359-6446(05)03536-1] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Specialized M cells in the follicle-associated epithelium of intestinal Peyer's patches serve as portals for diverse particulates. Following antigen handover to dome lymphocytes, a protective mucosal antibody secretion ensues. One approach to oral vaccine delivery is to mimic the entry pathways of pathogens via M cells. The paucity of human tissue for in vitro investigation has hampered the discovery of M-cell pathogen receptors; however an in vitro human M like-cell culture model displays many expected phenotypic features. Comparative studies using microarrays reveal several novel M-cell surface receptors that could be used to potentially target orally delivered antigens.
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Affiliation(s)
- David J Brayden
- Faculty of Veterinary Medicine and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
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Pohlmeyer I, Jörns J, Schumacher U, Van Damme EJM, Peumans WJ, Pfüller U, Neumann U. Lectin histochemical investigations of the distal gut of chicks with special emphasis on the follicle-associated epithelium. ACTA ACUST UNITED AC 2005; 52:138-46. [PMID: 15836446 DOI: 10.1111/j.1439-0442.2005.00696.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Carbohydrates on epithelial cell surfaces play an important role as attachment sites for different microorganisms like bacteria, viruses and protozoa. To obtain more information about the distribution of carbohydrates on the luminal surface along the intestine, lectin histochemical studies on different gut segments of chicks of different age groups were carried out using a panel of 13 lectins with specificities for Man, Glc, Gal, GalNAc, GlcNAc or GlcNAc oligosaccharides and Sia. Furthermore, we tried to find out whether previously reported specificities of certain lectins for M cells (membranous or multifold cells) in the bursa of Fabricius (BF) can be observed also on M cells of the intestine. As a result we were able to demonstrate binding of all lectins employed in these studies in all investigated gut segments. In some cases, the application of the same lectin led to varying staining intensities of the same histological structures in different age-groups (e.g. staining of the brush border with WGA, LEA, MAA or Conarva) or different gut segments (e.g. staining of goblet cells with CMA II, LEA and MPA). Hence, terminal carbohydrate residues of glycoconjugates on the intestinal epithelium vary depending on age and organ site. As glycoconjugates can act as attachment sites for microorganisms, these differences in the distribution of sugar residues may be one explanation for the site-specificity of certain pathogens. Furthermore, the binding of lectins to the follicle-associated epithelium (FAE) of the BF differs from that to the FAE of the intestine again stressing the site specificity of lectin binding. Thus, up to now no universal M-cell marker along the chicken intestine exists.
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Affiliation(s)
- I Pohlmeyer
- Clinic for Poultry, School of Veterinary Medicine Hannover, Germany.
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24
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Roth-Walter F, Schöll I, Untersmayr E, Ellinger A, Boltz-Nitulescu G, Scheiner O, Gabor F, Jensen-Jarolim E. Mucosal targeting of allergen-loaded microspheres by Aleuria aurantia lectin. Vaccine 2005; 23:2703-10. [PMID: 15780716 DOI: 10.1016/j.vaccine.2004.11.052] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2004] [Revised: 11/11/2004] [Accepted: 11/26/2004] [Indexed: 11/20/2022]
Abstract
Murine intestinal M-cells express alpha-L-fucose residues. We constructed alpha-L-fucose-targeting particles for oral immunotherapy of IgE-mediated allergy. Poly(D,L-lactic-co-glycolic acid)-microspheres were loaded with birch pollen allergens, and functionalised with the alpha-L-fucose specific Aleuria aurantia lectin (AAL). The AAL-microspheres had a size of 1-3 microm, protected the entrapped allergens from gastric degradation and released 46.6+/-1.3% allergen over 21 days in vitro. Oral gavages of AAL-particles to naive BALB/c mice induced birch pollen-specific IgG2a, but not IgG1 antibodies. We conclude that targeting allergens to alpha-L-fucose-receptor bearing cells using AAL-microspheres induces specific Th1-antibody responses possibly counteracting Th2-dominated allergy, and therefore provides a potentially useful formulation for oral immunotherapy.
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Affiliation(s)
- Franziska Roth-Walter
- Department of Pathophysiology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria
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25
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Abstract
Oral delivery of drugs to the small intestine is an important topic in the research and development of more effective oral dose forms. This review highlights several important developments in this area. An overriding theme in drug delivery to the small intestine is how to increase the efficiency (ie, how to increase bioavailability) of absorption. The role of P-glycoprotein and intestinal transporters is discussed in this regard. These systems are normally studied under defined in vitro conditions; recent data suggest that this approach, though useful, may not fully represent the in vivo situation. Recent advances and issues in the characterization and prediction of drug absorption from the small intestine are reviewed. These efforts, if successful, will shorten development timelines by eliminating compounds with poor absorption characteristics early in the process. Nanoparticulate delivery systems and those prepared by microfabrication technology are being used to improve bioavailability of poorly absorbed drugs. A relatively new technique (electroporation) has been proposed to enhance oral delivery of macromolecules, still an unrealized objective in drug delivery.
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Affiliation(s)
- David R Friend
- MicroDose Technologies, Inc., 4262 US Route 1, Monmouth Junction, NJ 08852, USA.
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26
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Jepson MA, Clark MA, Hirst BH. M cell targeting by lectins: a strategy for mucosal vaccination and drug delivery. Adv Drug Deliv Rev 2004; 56:511-25. [PMID: 14969756 DOI: 10.1016/j.addr.2003.10.018] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2003] [Accepted: 10/14/2003] [Indexed: 12/11/2022]
Abstract
Bioadhesins are a recognised method of enhancing the absorption of drugs and vaccines at mucosal surfaces. Additionally, bioadhesins allow for cell specific targeting. Lectin-mediated targeting and delivery exploits unique surface carbohydrates on mucosal epithelial cells. The antigen-sampling M cells offer a portal for absorption of colloidal and particulate delivery vehicles, including bacteria, viruses and inert microparticles. We review work supporting the use of lectins to aid targeting to intestinal M cells. Consideration is also given to lectin-mediated targeting in non-intestinal sites and to the potential application of other bioadhesins to enhance M cell transport. While substantial hurdles must be overcome before mucosal bioadhesins can guarantee consistent, safe, effective mucosal delivery, this strategy offers novel opportunities for drug and vaccine formulation.
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Affiliation(s)
- Mark A Jepson
- Cell Imaging Facility and Department of Biochemistry, School of Medical Sciences, University of Bristol, Bristol BS8 1TD, UK.
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27
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Affiliation(s)
- Claus-Michael Lehr
- Department of Biopharmaceutics and Pharmaceutical Technology, Saarland University, P.O. Box 15 11 50, D-66041 Saarbrücken, Germany.
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28
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Hamashin C, Spindler L, Russell S, Schink A, Lambkin I, O'Mahony D, Houghten R, Pinilla C. Identification of novel small-Molecule Ulex europaeus I mimetics for targeted drug delivery. Bioorg Med Chem 2003; 11:4991-7. [PMID: 14604661 DOI: 10.1016/j.bmc.2003.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Lectin mimetics have been identified that may have potential application towards targeted drug delivery. Synthetic multivalent polygalloyl constructs effectively competed with Ulex europaeus agglutinin I (UEA1) for binding to intestinal Caco-2 cell membranes.
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Affiliation(s)
- Christa Hamashin
- Mixture Sciences, Inc., 3550 General Atomics Court, San Diego, CA 92121, USA
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