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Nanovaccines

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https://www.readbyqxmd.com/read/29771487/cancer-cell-membrane-coated-adjuvant-nanoparticles-with-mannose-modification-for-effective-anticancer-vaccination
#1
Rong Yang, Jun Xu, Ligeng Xu, Xiaoqi Sun, Qian Chen, Yuhuan Zhao, Rui Peng, Zhuang Liu
Tumor vaccines for cancer prevention and treatment have attracted tremendous interests in the area of cancer immunotherapy in recent years. In this work, we present a strategy to construct cancer vaccines by encapsulating immune-adjuvant nanoparticles with cancer cell membrane modified by mannose. Poly (D, L-lactide-co-glycolide) (PLGA) nanoparticles are firstly loaded with toll-like receptor 7 agonist, imiquimod (R837). Those adjuvant nanoparticles (NP-R) are then coated with cancer cell membranes (NP-R@M), whose surface proteins could act as tumor-specific antigens...
May 17, 2018: ACS Nano
https://www.readbyqxmd.com/read/29770135/mucosal-immunity-and-protective-efficacy-of-intranasal-inactivated-influenza-vaccine-is-improved-by-chitosan-nanoparticle-delivery-in-pigs
#2
Santosh Dhakal, Sankar Renu, Shristi Ghimire, Yashavanth Shaan Lakshmanappa, Bradley T Hogshead, Ninoshkaly Feliciano-Ruiz, Fangjia Lu, Harm HogenEsch, Steven Krakowka, Chang Won Lee, Gourapura J Renukaradhya
Annually, swine influenza A virus (SwIAV) causes severe economic loss to swine industry. Currently used inactivated SwIAV vaccines administered by intramuscular injection provide homologous protection, but limited heterologous protection against constantly evolving field viruses, attributable to the induction of inadequate levels of mucosal IgA and cellular immune responses in the respiratory tract. A novel vaccine delivery platform using mucoadhesive chitosan nanoparticles (CNPs) administered through intranasal (IN) route has the potential to elicit strong mucosal and systemic immune responses in pigs...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29719216/hybrid-nanoparticle-based-nicotine-nanovaccines-boosting-the-immunological-efficacy-by-conjugation-of-potent-carrier-proteins
#3
Zongmin Zhao, Yun Hu, Theresa Harmon, Paul R Pentel, Marion Ehrich, Chenming Zhang
A series of hybrid nanoparticle-based nicotine nanovaccines (NanoNicVac) were engineered in this work by conjugating potent carrier protein candidates (Keyhole limpet hemocyanin (KLH) multimer, KLH subunit, cross reactive material 197 (CRM197 ), or tetanus toxoid (TT)) for enhanced immunological efficacy. NanoNicVac with CRM197 or TT were processed by dendritic cells more efficiently than that with KLH multimer or subunit. NanoNicVac carrying CRM197 or TT exhibited a significantly higher immunogenicity against nicotine and a considerably lower immunogenicity against carrier proteins than NanoNicVac carrying KLH multimer or subunit in mice...
April 29, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29698869/highly-enhanced-cancer-immunotherapy-by-combining-nanovaccine-with-hyaluronidase
#4
Xiuwen Guan, Jie Chen, Yingying Hu, Lin Lin, Pingjie Sun, Huayu Tian, Xuesi Chen
Tumor vaccine has been one of the research hotspots for cancer immunotherapy in recent years. By introducing tumor antigens into the body, the patient's own immune system will be specifically activated to induce effective immune responses for controlling or eliminating the malignant tumor cells. In this study, a simple nanovaccine was developed to induce antigen-specific anti-tumor immune responses. Polycationic polyethylenimine (PEI) was utilized to co-deliver the antigen ovalbumin (OVA) and the adjuvant unmethylated cytosine-phosphate-guanine (CpG) by electrostatic binding...
April 21, 2018: Biomaterials
https://www.readbyqxmd.com/read/29694053/potency-of-a-scalable-nanoparticulate-subunit-vaccine
#5
Dongdong Qiao, Lixin Liu, Yi Chen, Chenbao Xue, Qiang Gao, Hai-Quan Mao, Kam W Leong, Yongming Chen
Nanoparticulate vaccines can potentiate immune responses by site-specific drainage to lymph nodes (LNs). This approach may benefit from a nanoparticle engineering method with fine control over size and co-delivery of antigen and adjuvant. Here, we applied the flash nanocomplexation (FNC) method to prepare nanovaccines via polyelectrolyte complexation of chitosan and heparin to co-encapsulate the VP1 protein antigen from enterovirus 71, which causes hand-foot-mouth disease (HFMD), with tumor necrosis factor α (TNF) or CpG as adjuvants...
April 25, 2018: Nano Letters
https://www.readbyqxmd.com/read/29675543/improved-vaccine-induced-immune-responses-via-a-ros-triggered-nanoparticle-based-antigen-delivery-system
#6
Xiaoyu Liang, Jianwei Duan, Xuanling Li, Xiaowei Zhu, Youlu Chen, Xiaoli Wang, Hongfan Sun, Deling Kong, Chen Li, Jing Yang
Subunit vaccines that are designed based on recombinant antigens or peptides have shown promising potential as viable substitutes for traditional vaccines due to their better safety and specificity. However, the induction of adequate in vivo immune responses with appropriate effectiveness remains a major challenge for vaccine development. More recently, the implementation of a nanoparticle-based antigen delivery system has been considered a promising approach to improve the in vivo efficacy for subunit vaccine development...
April 20, 2018: Nanoscale
https://www.readbyqxmd.com/read/29665972/intranasal-delivery-of-influenza-antigen-by-nanoparticles-but-not-nkt-cell-adjuvant-differentially-induces-the-expression-of-b-cell-activation-factors-in-mice-and-swine
#7
Sankar Renu, Santosh Dhakal, Eunsoo Kim, Jonathan Goodman, Yashavanth S Lakshmanappa, Michael J Wannemuehler, Balaji Narasimhan, Prosper N Boyaka, Gourapura J Renukaradhya
Intranasal vaccination of pigs with poly lactic-co-glycolic acid and polyanhydride nanoparticles delivered inactivated influenza virus provides cross-reactive T-cell response, but not antibody response, resulting in incomplete protection and no reduction in nasal virus shedding. Expression of BAFF and Th2 transcription factor GATA-3 were downregulated in lungs of pigs vaccinated with influenza nanovaccine, but in mice it upregulated the expression of BAFF and cytokine TGFβ in cervical lymph nodes. However, the intranasal iNKT cell adjuvant, α-Galctosylceramide upregulates the expression of BAFF in pig lungs...
April 11, 2018: Cellular Immunology
https://www.readbyqxmd.com/read/29599766/room-temperature-stable-pspa-based-nanovaccine-induces-protective-immunity
#8
Danielle A Wagner-Muñiz, Shannon L Haughney, Sean M Kelly, Michael J Wannemuehler, Balaji Narasimhan
Streptococcus pneumoniae is a major causative agent of pneumonia, a debilitating disease particularly in young and elderly populations, and is the leading worldwide cause of death in children under the age of five. While there are existing vaccines against S. pneumoniae , none are protective across all serotypes. Pneumococcal surface protein A (PspA), a key virulence factor of S. pneumoniae , is an antigen that may be incorporated into future vaccines to address the immunological challenges presented by the diversity of capsular antigens...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29508543/photothermally-controlled-mhc-class-i-restricted-cd8-t-cell-responses-elicited-by-hyaluronic-acid-decorated-gold-nanoparticles-as-a-vaccine-for-cancer-immunotherapy
#9
Fengqiang Cao, Mengmeng Yan, Yijia Liu, Lanxia Liu, Guilei Ma
Cancer vaccines aim to induce a strong major histocompatibility complex class I (MHC-I)-restricted CD8+ cytotoxic T-cell response, which is an important prerequisite for successful cancer immunotherapy. Herein, a hyaluronic acid (HA) and antigen (ovalbumin, OVA)-decorated gold nanoparticle (AuNPs)-based (HA-OVA-AuNPs) vaccine is developed for photothermally controlled cytosolic antigen delivery using near-infrared (NIR) irradiation and is found to induce antigen-specific CD8+ T-cell responses. Chemical binding of thiolated HA and OVA to AuNPs facilitates antigen uptake of dendritic cells via receptor-mediated endocytosis...
March 6, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29499438/necroptotic-cancer-cells-mimicry-nanovaccine-boosts-anti-tumor-immunity-with-tailored-immune-stimulatory-modality
#10
Ting Kang, Yukun Huang, Qianqian Zhu, Hao Cheng, Yuanyuan Pei, Jingxian Feng, Minjun Xu, Gan Jiang, Qingxiang Song, Tianze Jiang, Hongzhuan Chen, Xiaoling Gao, Jun Chen
Recent breakthroughs in cancer immunotherapy offer new paradigm-shifting therapeutic options for combating cancer. Personalized therapeutic anti-cancer vaccines training T cells to directly fight against tumor cells endogenously offer tremendous benefits in working synergistically with immune checkpoint inhibitors. Biomimetic nanotechnology offers a versatile platform to boost anticancer immunity by efficiently co-delivering optimized immunogenic antigen materials and adjuvants to antigen presenting cells (APC)...
May 2018: Biomaterials
https://www.readbyqxmd.com/read/29493121/endolysosomal-escape-nanovaccines-through-adjuvant-induced-tumor-antigen-assembly-for-enhanced-effector-cd8-t-cell-activation
#11
Liping Qiu, Michael Valente, Yusuf Dolen, Eliezer Jäger, Martin Ter Beest, Liyan Zheng, Carl G Figdor, Martijn Verdoes
The activation of tumor-specific effector immune cells is key for successful immunotherapy and vaccination is a powerful strategy to induce such adaptive immune responses. However, the generation of effective anticancer vaccines is challenging. To overcome these challenges, a novel straight-forward strategy of adjuvant-induced tumor antigen assembly to generate nanovaccines with superior antigen/adjuvant loading efficiency is developed. To protect nanovaccines in circulation and to introduce additional functionalities, a biocompatible polyphenol coating is installed...
April 2018: Small
https://www.readbyqxmd.com/read/29474923/a-visible-fluorescent-nanovaccine-based-on-functional-genipin-crosslinked-ovalbumin-protein-nanoparticles
#12
Xia Dong, Zhiting Sun, Jie Liang, Hai Wang, Dunwan Zhu, Xigang Leng, Chun Wang, Deling Kong, Feng Lv
Accurate and efficient antigen delivery is crucial for inducing a strong and long-term immune response. A visible protein nanovaccine made from antigen could provide a novel and promising technology for secure and efficient delivery of the antigen with imaging visualization. In this study, a functional nanovaccine based on genipin crosslinked ovalbumin (OVA) fluorescent nanoparticles with chitosan (CS-OVA-NPs) was developed. The nanovaccine can carry abundant antigens by self-crosslinking without additional carriers...
February 21, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29445124/efficacy-of-mucosal-polyanhydride-nanovaccine-against-respiratory-syncytial-virus-infection-in-the-neonatal-calf
#13
Jodi L McGill, Sean M Kelly, Pankaj Kumar, Savannah Speckhart, Shannon L Haughney, Jamie Henningson, Balaji Narasimhan, Randy E Sacco
Human respiratory syncytial virus (HRSV) is a leading cause of severe acute lower respiratory tract infection in infants and children worldwide. Bovine RSV (BRSV) is closely related to HRSV and a significant cause of morbidity in young cattle. BRSV infection in calves displays many similarities to RSV infection in humans, including similar age dependency and disease pathogenesis. Polyanhydride nanoparticle-based vaccines (i.e., nanovaccines) have shown promise as adjuvants and vaccine delivery vehicles due to their ability to promote enhanced immunogenicity through the route of administration, provide sustained antigen exposure, and induce both antibody- and cell-mediated immunity...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29436537/photosensitizer-induced-self-assembly-of-antigens-as-nanovaccines-for-cancer-immunotherapy
#14
F Q Cao, M M Yan, Y J Liu, L X Liu, L Lu, H Wang, Ch Zhang, H F Sun, D L Kong, G L Ma
Herein, the photosensitizer indocyanine green (ICG) is used to induce the self-assembly of antigens to form nanovaccines. Under near-infrared (NIR) laser irradiation, reactive oxygen species can be generated by nanovaccines to disrupt the membranes of endo/lysosomes, which helps to release antigens into the cytosol efficiently, thereby enhancing antigen cross-presentation and anti-cancer immunity. To the best of our knowledge, this study represents the first example of ICG as a biocompatible adjuvant to improve cancer vaccine efficacy...
February 27, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29430819/intranasal-nanovaccine-confers-homo-and-hetero-subtypic-influenza-protection
#15
Mi Qi, Xian-En Zhang, Xianxun Sun, Xiaowei Zhang, Yanfeng Yao, Siling Liu, Ze Chen, Wei Li, Zhiping Zhang, Jianjun Chen, Zongqiang Cui
Cross-protective and non-invasively administered vaccines are attractive and highly desired for the control of influenza. Self-assembling nanotechnology provides an opportunity for the development of vaccines with superior performance. In this study, an intranasal nanovaccine is developed targeting the conserved ectodomain of influenza matrix protein 2(M2e). 3-sequential repeats of M2e (3M2e) is presented on the self-assembling recombinant human heavy chain ferritin (rHF) cage to form the 3M2e-rHF nanoparticle...
March 2018: Small
https://www.readbyqxmd.com/read/29399580/immunogenicity-of-the-nanovaccine-containing-intimin-recombinant-protein-in-the-balb-c-mice
#16
Zahra Sadat Hosseini, Jafar Amani, Fahimeh Baghbani Arani, Shahram Nazarian, Mohammad Javad Motamedi, Fatemeh Shafighian
Purpose: Escherichia coli O157:H7 is one of the most important pathogens which create hemorrhagic colitis and hemolytic uremic syndrome in human. It is one of the most prevalent causes of diarrhea leading to death of many people every year. The first diagnosed gene in the locus of enterocyte effacement pathogenicity island is eae gene. The product of this gene is a binding protein called intimin belonging to the group of external membrane proteins regarded as a good stimulants of the immune system...
January 2018: Clinical and Experimental Vaccine Research
https://www.readbyqxmd.com/read/29382248/future-of-human-chlamydia-vaccine-potential-of-self-adjuvanting-biodegradable-nanoparticles-as-safe-vaccine-delivery-vehicles
#17
Rajnish Sahu, Richa Verma, Saurabh Dixit, Joseph U Igietseme, Carolyn M Black, Skyla Duncan, Shree R Singh, Vida A Dennis
There is a persisting global burden and considerable public health challenge by the plethora of ocular, genital and respiratory diseases caused by members of the Gram-negative bacteria of the genus Chlamydia. The major diseases are conjunctivitis and blinding trachoma, non-gonococcal urethritis, cervicitis, pelvic inflammatory disease, ectopic pregnancy, tubal factor infertility, and interstitial pneumonia. The failures in screening and other prevention programs led to the current medical opinion that an efficacious prophylactic vaccine is the best approach to protect humans from chlamydial infections...
March 2018: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29343454/rational-design-and-evaluation-of-hbsag-polymeric-nanoparticles-as-antigen-delivery-carriers
#18
Hitesh Kumar Dewangan, Tarun Pandey, Lakshmi Maurya, Sanjay Singh
The present work is focused on the development and evaluation of single dose sustained-release Hepatitis B surface antigen (HBsAg) loaded nanovaccine for Hepatitis B. The conventional treatment suffers from repeated administration and hence requires a booster dose. Therefore, polymeric nanovaccine of HBsAg was developed by double emulsion solvent evaporation technique, utilizing central composite design for formulation optimization. The effects of independent variables (like polymer amount, stabilizer concentration, aqueous/organic phase ratio and homogenizer speed) were also studied on critical quality attributes like particle size and entrapment efficiency...
January 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29324305/caveolin-mediated-endocytosis-of-the-chlamydia-m278-outer-membrane-peptide-encapsulated-in-poly-lactic-acid-poly-ethylene-glycol-nanoparticles-by-mouse-primary-dendritic-cells-enhances-specific-immune-effectors-mediated-by-mhc-class-ii-and-cd4-t-cells
#19
Saurabh Dixit, Rajnish Sahu, Richa Verma, Skyla Duncan, Guillermo H Giambartolomei, Shree R Singh, Vida A Dennis
We previously developed a Chlamydia trachomatis nanovaccine (PPM) by encapsulating a chlamydial M278 peptide within poly(lactic acid)-poly(ethylene glycol) biodegradable nanoparticles that immunopotentiated Chlamydia-specific immune effector responses in mice. Herein, we investigated the mechanistic interactions of PPM with mouse bone marrow-derived dendritic cells (DCs) for its uptake, trafficking, and T cell activation. Our results reveal that PPM triggered enhanced expression of effector cytokines and chemokines, surface activation markers (Cd1d2, Fcgr1), pathogen-sensing receptors (TLR2, Nod1), co-stimulatory (CD40, CD80, CD86) and MHC class I and II molecules...
March 2018: Biomaterials
https://www.readbyqxmd.com/read/29323913/nanoparticles-with-cd44-targeting-and-ros-triggering-properties-as-effective-in-vivo-antigen-delivery-system
#20
Xiaoyu Liang, Xuanling Li, Jianwei Duan, Youlu Chen, Xiaoli Wang, Liyun Pang, Deling Kong, Bing Song, Chen Li, Jing Yang
Currently, development of subunit vaccine based on recombinant antigens or peptides has gradually become an important alternative option for traditional vaccine. However, induction of potent immune response with desired efficacy remains a major challenge. The nanoparticle-based antigen delivery system has been considered a potential carrier system to improve the efficacy of subunit vaccine. In the present study, we have designed an immune-stimulatory delivery system by conjugating three-armed PLGA to PEG via the peroxalate ester bond which is sensitive to hydrogen peroxide (H2 O2 ), a major reactive oxygen species (ROS)...
February 5, 2018: Molecular Pharmaceutics
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