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https://www.readbyqxmd.com/read/29344312/an-endogenous-vaccine-based-on-fluorophores-and-multivalent-immunoadjuvants-regulates-tumor-micro-environment-for-synergistic-photothermal-and-immunotherapy
#1
Ling Li, Suleixin Yang, Linjiang Song, Yan Zeng, Tao He, Ning Wang, Chuan Yu, Tao Yin, Li Liu, Xiawei Wei, Qinjie Wu, Yuquan Wei, Li Yang, Changyang Gong
Recently, near-infrared (NIR) light-based photothermal therapy (PTT) has been widely applied in cancer treatment. However, in most cases, the tissue penetration depth of NIR light is not sufficient and thus photothermal therapy is unable to completely eradicate deep, seated tumors inevitably leading to recurrence of the tumor. Due to this significant limitation of NIR, improved therapeutic strategies are urgently needed. Methods: We developed an endogenous vaccine based on a novel nanoparticle platform for combinatorial photothermal ablation and immunotherapy...
2018: Theranostics
https://www.readbyqxmd.com/read/29337870/glioblastoma-under-siege-an-overview-of-current-therapeutic-strategies
#2
REVIEW
Mayra Paolillo, Cinzia Boselli, Sergio Schinelli
Glioblastoma is known to be one of the most lethal and untreatable human tumors. Surgery and radiotherapy in combination with classical alkylating agents such as temozolomide offer little hope to escape a poor prognosis. For these reasons, enormous efforts are currently devoted to refine in vivo and in vitro models with the specific goal of finding new molecular aberrant pathways, suitable to be targeted by a variety of therapeutic approaches, including novel pharmaceutical formulations and immunotherapy strategies...
January 16, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29334279/uric-acid-and-the-vaccine-adjuvant-activity-of-aluminum-oxy-hydroxide-nanoparticles
#3
Sachin G Thakkar, Haiyue Xu, Xu Li, Zhengrong Cui
In an effort to improve the adjuvanticity of insoluble aluminum salts, we discovered that the adjuvant activity of aluminum salt nanoparticles is significantly stronger than aluminum salt microparticles, likely related to nanoparticle's stronger ability to directly activate NLRP3 inflammasome as the nanoparticles are more efficiently taken up by phagocytic cells. Endogenous signals such as uric acid from cell damage or death caused by the cytotoxicity of aluminum salts are thought to indirectly activate inflammasome, prompting us to hypothesize that the potent adjuvant activity of aluminum salt nanoparticles is also related to their ability to stimulate uric acid production...
January 15, 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29328884/evaluation-of-g2-citric-acid-based-dendrimer-as-an-adjuvant-in-veterinary-rabies-vaccine
#4
Vahid Asgary, Alireza Shoari, Majid Afshar Moayad, Mehdi Shafiee Ardestani, Razieh Bigdeli, Leila Ghazizadeh, Mohammad Sadeq Khosravy, Erfan Panahnejad, Alireza Janani, Rouzbeh Bashar, Maliheh Abedi, Reza Ahangari Cohan
For induction of an appropriate immune response, especially in the case of an inactivated vaccine, the use of an adjuvant is crucial. In this study, adjuvanticity effect of G2 dendrimer in veterinary rabies vaccine has been investigated. A nonlinear globular G2 dendrimer comprising citric acid and polyethylene glycol 600 (PEG-600) was synthesized and the toxicity was studied in vitro on the J774A.1 cell line. The adjuvanticity effect of the dendrimer was then investigated on rabies virus in NMRI mice as a model...
January 2018: Viral Immunology
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
#5
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...
December 26, 2017: Biomaterials
https://www.readbyqxmd.com/read/29323913/nanoparticles-with-cd44-targeting-and-ros-triggering-property-as-effective-in-vivo-antigen-delivery-system
#6
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 (H2O2), a major reactive oxygen species (ROS)...
January 11, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29313026/transcutaneous-pollinosis-immunotherapy-using-a-solid-in-oil-nanodispersion-system-carrying-t-cell-epitope-peptide-and-r848
#7
Momoko Kitaoka, Ayaka Naritomi, Yoshinori Kawabe, Masamichi Kamihira, Noriho Kamiya, Masahiro Goto
Antigen-specific immunotherapy is the only curative approach for the treatment of allergic diseases such as Japanese cedar pollinosis. Immunotherapy using a T cell epitope vaccine in combination with the adjuvant R848 is of particular interest as a safe and effective approach to treat allergic diseases. Herein, we propose a simple and easy to handle vaccine administration method using the original solid-in-oil (S/O) nanodispersion system that permeates through the skin. The S/O nanodispersion system is composed of nanoparticles of hydrophilic molecules surrounded with hydrophobic surfactants that are dispersed in an oil vehicle...
March 2017: Bioengineering & Translational Medicine
https://www.readbyqxmd.com/read/29306151/enhancement-of-immune-response-of-piglets-to-pcv-2-vaccine-by-porcine-il-2-and-fusion-il-4-6-gene-entrapped-in-chitosan-nanoparticles
#8
Yi Chen, Tingyu Song, Yong-Le Xiao, Xiaoping Wan, Luyi Yang, Jinghai Li, Guangzhi Zeng, Pengfei Fang, Ze-Zhou Wang, Rong Gao
In order to develop a novel effective immunomodulator to enhance pig resistance against post-weaning multi systemic wasting syndrome (PMWS), a recombinant plasmid co-expressing pig interleukin-2 (IL-2) and fusion interleukin-4/6 (IL-4/6) genes, designated VRIL4/6-2, was constructed and encapsulated in chitosan (CS) nanoparticles prepared by the ionotropic gelation method. Then 21-day old piglets were divided into two groups and intramuscularly injected respectively with VPIL4/6-2-CS and saline along with the porcine circovirus-2 (PCV-2) vaccine...
December 29, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29306001/nanoparticulate-vaccine-inhibits-tumor-growth-via-improved-t-cell-recruitment-into-melanoma-and-huher2-breast-cancer
#9
Eva Zupančič, Caterina Curato, Jung-Seok Kim, Eilam Yeini, Ziv Porat, Ana S Viana, Anat Globerson-Levin, Tova Waks, Zelig Eshhar, João N Moreira, Ronit Satchi-Fainaro, Lea Eisenbach, Steffen Jung, Helena F Florindo
Nanoparticulate vaccines are promising tools to overcome cancer immune evasion. However, a deeper understanding on nanoparticle-immune cell interactions and treatments regime are required for optimal efficacy. We provide a comprehensive study of treatment schedules and mode of antigen-association to nanovaccines on the modulation of T cell immunity in vivo, under steady-state and tumor-bearing mice. The coordinated delivery of antigen and two adjuvants (Monophosphoryl lipid A, oligodeoxynucleotide cytosine-phosphate-guanine motifs (CpG)) by nanoparticles was crucial for dendritic cell activation...
January 3, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29300166/a-systematic-review-of-zika-virus-hurdles-toward-vaccine-development-and-the-way-forward
#10
Azizul Haque, Faruk Berat Akçeşme, Anudeep B Pant
The Zika virus (ZIKV) epidemic has recently emerged as public health threat due to its teratogenic nature and association with the serious neurological condition Guillain-Barré syndrome (GBS). To date, no approved antiviral therapeutics or vaccines are available to confront ZIKV. In order to develop effective anti-ZIKV vaccines, improved animal models and a better understanding of immunological correlates of protection against ZIKV are required. In this paper, we discuss the recent progress in developing vaccines against ZIKV and the hurdles to overcome in making efficacious anti-Zika vaccines...
January 4, 2018: Antiviral Therapy
https://www.readbyqxmd.com/read/29281708/protein-protein-conjugate-nanoparticles-for-malaria-antigen-delivery-and-enhanced-immunogenicity
#11
Puthupparampil V Scaria, Beth Chen, Christopher G Rowe, David S Jones, Emma Barnafo, Elizabeth R Fischer, Charles Anderson, Nicholas J MacDonald, Lynn Lambert, Kelly M Rausch, David L Narum, Patrick E Duffy
Chemical conjugation of polysaccharide to carrier proteins has been a successful strategy to generate potent vaccines against bacterial pathogens. We developed a similar approach for poorly immunogenic malaria protein antigens. Our lead candidates in clinical trials are the malaria transmission blocking vaccine antigens, Pfs25 and Pfs230D1, individually conjugated to the carrier protein Exoprotein A (EPA) through thioether chemistry. These conjugates form nanoparticles that show enhanced immunogenicity compared to unconjugated antigens...
2017: PloS One
https://www.readbyqxmd.com/read/29281112/modified-mrna-based-vaccines-elicit-robust-immune-responses-and-protect-guinea-pigs-from-ebola-virus-disease
#12
Michelle Meyer, Eric Huang, Olga Yuzhakov, Palaniappan Ramanathan, Giuseppe Ciaramella, Alexander Bukreyev
Most current Ebola virus (EBOV) vaccine candidates are based on viral vectors, some of which cause side effects or require complex manufacturing. Modified mRNA vaccines are easily produced, safe, and are highly immunogenic. We developed 2 mRNA vaccines based on the EBOV envelope glycoprotein, which differed by the nature of signal peptide for improved glycoprotein post-translational translocation. The mRNAs were formulated with lipid nanoparticles to facilitate delivery. Vaccination of guinea pigs induced EBOV-specific IgG and neutralizing antibody responses and 100% survival after EBOV infection...
December 21, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29273425/supercharged-green-fluorescent-protein-delivers-hpv16e7-dna-and-protein-into-mammalian-cells-in-vitro-and-in-vivo
#13
Fatemeh Motevalli, Azam Bolhassani, Shilan Hesami, Sepideh Shahbazi
Macromolecules including DNA and proteins serve as important human therapeutics but are limited by their general inability to cross cell membranes. Supercharged proteins have been known as potent tools for delivery of macromolecules into mammalian cells. Thus, the use of these delivery systems is important to reduce the human papillomavirus (HPV)-associated malignancies through improvement of vaccine modalities. In this study, we used a supercharged green fluorescent protein (+36 GFP) for delivery of the full-length HPV16 E7 DNA and protein into mammalian cells and evaluated immune responses, and protective/therapeutic effects of different formulations in C57BL/6 tumor mice model...
December 19, 2017: Immunology Letters
https://www.readbyqxmd.com/read/29260901/development-and-physicochemical-toxicity-and-immunogenicity-assessments-of-recombinant-hepatitis-b-surface-antigen-rhbsag-entrapped-in-chitosan-and-mannosylated-chitosan-nanoparticles-as-a-novel-vaccine-delivery-system-and-adjuvant
#14
Mohsen Mehrabi, Naser Mohammadpour Dounighi, Seyed Mahdi Rezayat Sorkhabadi, Delaram Doroud, Amir Amani, Mehdi Khoobi, Soheila Ajdary, Younes Pilehvar-Soltanahmadi
In this study chitosan nanoparticles (CS NPs) and mannosylated chitosan nanoparticles (MCH NPs) loaded with recombinant hepatitis B surface antigen (rHBsAg) was synthesized as a vaccine delivery system and assessed toxically and immunologically. The physicochemical properties of the nanoparticles (NPs) were determined by methods including scanning electron microscope (SEM) and dynamic light scattering (DLS). The morphology of the NPs was semi spherical and the average diameter of the loaded CS and MCH NPs was found to be 189 and 239 nm, respectively...
December 20, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29258739/combination-immunotherapy-of-muc1-mrna-nano-vaccine-and-ctla-4-blockade-effectively-inhibits-growth-of-triple-negative-breast-cancer
#15
Lina Liu, Yuhua Wang, Lei Miao, Qi Liu, Sara Musetti, Jun Li, Leaf Huang
Triple negative breast cancer (TNBC), which constitutes 10%-20% of all breast cancers, is associated with aggressive progression, a high rate of metastasis, and poor prognosis. The treatment of patients with TNBC remains a great clinical challenge. Preclinical reports support the combination immunotherapy of cancer vaccines and immune checkpoint blockades in non-immunogenic tumors. In this study, we constructed nanoparticles (NPs) to deliver an mRNA vaccine encoding tumor antigen MUC1 to dendritic cells (DCs) in lymph nodes to activate and expand tumor-specific T cells...
December 5, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/29250719/selenium-nanoparticles-in-poultry-feed-modify-gut-microbiota-and-increase-abundance-of-faecalibacterium-prausnitzii
#16
Sheeana Gangadoo, Ivan Dinev, James Chapman, Robert J Hughes, Thi Thu Hao Van, Robert J Moore, Dragana Stanley
The poultry industry aims to improve productivity while maintaining the health and welfare of flocks. Pathogen control has been achieved through biosecurity, vaccinations and the use of antibiotics. However, the emergence of antibiotic resistance, in animal and human pathogens, has prompted researchers and chicken growers alike to seek alternative approaches. The use of new and emerging approaches to combat pathogen activity including nanotechnology, in particular, silver nanoparticles (NPs), has been found to not only eradicate pathogenic bacteria but also include issues of toxicity and bioaccumulation effects...
December 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29249397/mrna-vaccine-with-antigen-specific-checkpoint-blockade-induces-an-enhanced-immune-response-against-established-melanoma
#17
Yuhua Wang, Lu Zhang, Zhenghong Xu, Lei Miao, Leaf Huang
We reported a preclinical cancer vaccine that simultaneously introduced an mRNA antigen and an immune checkpoint blocking siRNA into the antigen-presenting cells. This was achieved by formulating both nucleic acid-based immunotherapeutics into a lipid-coated calcium phosphate (LCP) nanoparticle (NP) as a carrier to address the delivery challenge. The PEGylated lipid NPs were functionalized with mannose as the targeting ligand to facilitate the preferential uptake by the dendritic cells (DCs) in the lymph nodes after subcutaneous administration...
November 21, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/29246926/combined-active-humoral-and-cellular-immunization-approaches-for-the-treatment-of-synucleinopathies
#18
Edward Rockenstein, Gary Ostroff, Fusun Dikengil, Florentina Rus, Michael Mante, Jazmin Florio, Anthony Adame, Ivy Trinh, Changyoun Kim, Cassia Overk, Eliezer Masliah, Robert A Rissman
Dementia with Lewy bodies (DLB), Parkinson's disease (PD) and Multiple System Atrophy (MSA) are age-related neurodegenerative disorders characterized by progressive accumulation of α-synuclein (α-syn) and jointly termed synucleinopathies. Currently, no disease-modifying treatments are available for these disorders. Previous preclinical studies showed that active and passive immunizations targeting α-syn partially ameliorates behavioral deficits and α-syn accumulation; however, it is unknown if combining humoral and cellular immunization might act synergistically to reduce inflammation and improve microglial-mediated α-syn clearance...
December 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29246516/isolation-of-recombinant-hepatitis-b-surface-antigen-with-antibody-conjugated-superparamagnetic-fe3o4-sio2-core-shell-nanoparticles
#19
Mehdi Mostafaei, Seyed Nezamedin Hosseini, Maryam Khatami, Amin Javidanbardan, Abbas Akhavan Sepahy, Ebadullah Asadi
In the production process of recombinant Hepatitis B surface antigen (rHBsAg) various separation techniques are used to purify this virus-like particle (VLP). In this study, we developed antibody-conjugated super-paramagnetic Fe3O4/SiO2 core-shell nanoparticles as a highly selective method for isolation of expressed rHBsAg in yeast Pichia pastoris. For this purpose, first, iron oxide magnetic nanoparticles (MNPs) were prepared by co-precipitation method in alkali media and coated with silica. Then the surface was activated by amine groups and conjugated with oxidized antibodies...
December 12, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/29246318/size-shape-and-sequence-dependent-immunogenicity-of-rna-nanoparticles
#20
Sijin Guo, Hui Li, Mengshi Ma, Jian Fu, Yizhou Dong, Peixuan Guo
RNA molecules have emerged as promising therapeutics. Like all other drugs, the safety profile and immune response are important criteria for drug evaluation. However, the literature on RNA immunogenicity has been controversial. Here, we used the approach of RNA nanotechnology to demonstrate that the immune response of RNA nanoparticles is size, shape, and sequence dependent. RNA triangle, square, pentagon, and tetrahedron with same shape but different sizes, or same size but different shapes were used as models to investigate the immune response...
December 15, 2017: Molecular Therapy. Nucleic Acids
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