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https://www.readbyqxmd.com/read/28722020/a-critical-role-of-gas6-axl-signal-in-allergic-airway-responses-during-rsv-vaccine-enhanced-disease
#1
Takehiko Shibata, Manabu Ato
Respiratory syncytial virus (RSV) is a common virus that causes lower respiratory infections across a wide range of ages. A licensed RSV vaccine is not available because vaccination with formalin-inactivated RSV (FI-RSV) and the subsequent RSV infection cause not only insufficient induction of neutralizing antibodies but also severe allergic airway responses, termed FI-RSV vaccine enhanced disease (FI-RSV VED). However, the underlying mechanism has not been identified, although a Th2-biased immune response is known to be a hallmark of this disease...
July 19, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28720467/intradermal-immunization-with-raav1-vector-induces-robust-memory-cd8-t-cell-responses-independently-of-transgene-expression-in-dcs
#2
Alexandre Ghenassia, David-Alexandre Gross, Stéphanie Lorain, Fabiola Tros, Dominique Urbain, Sofia Benkhelifa-Ziyyat, Alain Charbit, Jean Davoust, Pascal Chappert
Recombinant adeno-associated viral (rAAV) vectors exhibit interesting properties as vaccine carriers for their ability to induce long-lasting antibody responses. However, rAAV-based vaccines have been suggested to trigger functionally impaired long-term memory CD8(+) T cell responses, in part due to poor dendritic cell (DC) transduction. Such results, albeit limited to intramuscular immunization, undermined the use of rAAV as vaccine vehicles against intracellular pathogens. We report here that intradermal immunization with a model rAAV2/1-based vaccine drives the development of bona fide long-term memory CD8(+) T cell responses...
July 15, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28714508/gold-glyconanoparticles-coupled-to-listeriolysin-o-91-99-peptide-serve-as-adjuvant-therapy-against-melanoma
#3
R Calderon-Gonzalez, H Terán-Navarro, I García, M Marradi, D Salcines-Cuevas, S Yañez-Diaz, A Solis-Angulo, E Frande-Cabanes, M C Fariñas, A Garcia-Castaño, J Gomez-Roman, S Penades, F Rivera, J Freire, C Álvarez-Domínguez
Dendritic cell-based (DC-based) vaccines are promising immunotherapies for cancer. However, several factors, such as the lack of efficient targeted delivery and the sources and types of DCs, have limited the efficacy of DCs and their clinical potential. We propose an alternative nanotechnology-based vaccine platform with antibacterial prophylactic abilities that uses gold glyconanoparticles coupled to listeriolysin O 91-99 peptide (GNP-LLO91-99), which acts as a novel adjuvant for cancer therapy. GNP-LLO91-99, when used to vaccinate mice, exhibited dual antitumour activities, namely, the inhibition of tumour migration and growth and adjuvant activity for recruiting and activating DCs, including those from melanoma patients...
July 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28713366/intratumoral-lentivector-mediated-tgf-%C3%AE-1-gene-downregulation-as-a-potent-strategy-for-enhancing-the-antitumor-effect-of-therapy-composed-of-cyclophosphamide-and-dendritic-cells
#4
Joanna Rossowska, Natalia Anger, Agnieszka Szczygieł, Jagoda Mierzejewska, Elżbieta Pajtasz-Piasecka
Vaccination with dendritic cells (DCs) stimulated with tumor antigens can induce specific cellular immune response that recognizes a high spectrum of tumor antigens. However, the ability of cancer cells to produce immunosuppressive factors drastically decreases the antitumor activity of DCs. The main purpose of the study was to improve the effectiveness of DC-based immunotherapy or chemoimmunotherapy composed of cyclophosphamide (CY) and DCs by application of lentivectors (LVs)-encoding short hairpin RNA specific for TGF-β1 (shTGFβ1 LVs)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28713023/an-extended-mathematical-model-of-tumor-growth-and-its-interaction-with-the-immune-system-to-be-used-for-developing-an-optimized-immunotherapy-treatment-protocol
#5
Milad Qomlaqi, Fariba Bahrami, Maryam Ajami, Jamshid Hajati
BACKGROUND: chemotherapy is usually known as the main modality for cancer treatment. Nevertheless, most of chronic cancers could not be treated with chemotherapy alone. Immunotherapy is a new modality for cancer treatment that is effective for early stages of cancer and it has fewer side effects compared to chemotherapy, specifically for those types of cancer that are resistant to it. METHOD: This work presents an extended mathematical model to depict interactions between cancerous and adaptive immune system in mouse...
July 13, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28710434/modifying-dendritic-cell-activation-with-plasmonic-nano-vectors
#6
Kieng Bao Vang, Ingrid Safina, Emilie Darrigues, Dmitry Nedosekin, Zeid A Nima, Waqar Majeed, Fumiya Watanabe, Ganesh Kannarpady, Rajshekhar A Kore, Daniel Casciano, Vladimir P Zharov, Robert J Griffin, Ruud P M Dings, Alexandru S Biris
Dendritic cells (DCs) can acquire, process, and present antigens to T-cells to induce an immune response. For this reason, targeting cancer antigens to DCs in order to cause an immune response against cancer is an emerging area of nanomedicine that has the potential to redefine the way certain cancers are treated. The use of plasmonically active silver-coated gold nanorods (henceforth referred to as plasmonic nano vectors (PNVs)) as potential carriers for DC tumor vaccines has not been presented before. Effective carriers must be able to be phagocytized by DCs, present low toxicity, and induce the maturation of DCs-an early indication of an immune response...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28710250/near-infrared-1064-nm-laser-modulates-migratory-dendritic-cells-to-augment-the-immune-response-to-intradermal-influenza-vaccine
#7
Kaitlyn Morse, Yoshifumi Kimizuka, Megan P K Chan, Mai Shibata, Yusuke Shimaoka, Shu Takeuchi, Benjamin Forbes, Christopher Nirschl, Binghao Li, Yang Zeng, Roderick T Bronson, Wataru Katagiri, Ayako Shigeta, Ruxandra F Sîrbulescu, Huabiao Chen, Rhea Y Y Tan, Kosuke Tsukada, Timothy Brauns, Jeffrey Gelfand, Ann Sluder, Joseph J Locascio, Mark C Poznansky, Niroshana Anandasabapathy, Satoshi Kashiwagi
Brief exposure of skin to near-infrared (NIR) laser light has been shown to augment the immune response to intradermal vaccination and thus act as an immunologic adjuvant. Although evidence indicates that the NIR laser adjuvant has the capacity to activate innate subsets including dendritic cells (DCs) in skin as conventional adjuvants do, the precise immunological mechanism by which the NIR laser adjuvant acts is largely unknown. In this study we sought to identify the cellular target of the NIR laser adjuvant by using an established mouse model of intradermal influenza vaccination and examining the alteration of responses resulting from genetic ablation of specific DC populations...
July 14, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28704679/ph-sensitive-polymer-modified-liposome-based-immunity-inducing-system-effects-of-inclusion-of-cationic-lipid-and-cpg-dna
#8
Yuta Yoshizaki, Eiji Yuba, Naoki Sakaguchi, Kazunori Koiwai, Atsushi Harada, Kenji Kono
Efficient vaccine carriers for cancer immunotherapy require two functions: antigen delivery to dendritic cells (DCs) and the activation of DCs, a so-called adjuvant effect. We previously reported antigen delivery system using liposomes modified with pH-sensitive polymers, such as 3-methylglutarylated hyperbranched poly(glycidol) (MGlu-HPG), for the induction of antigen-specific immune responses. We reported that inclusion of cationic lipids to MGlu-HPG-modified liposomes activates DCs and enhances antitumor effects...
July 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28700341/survival-of-metastatic-melanoma-patients-after-dendritic-cell-vaccination-correlates-with-expression-of-leukocyte-phosphatidylethanolamine-binding-protein-1-raf-kinase-inhibitory-protein
#9
Sonja I Buschow, Matteo Ramazzotti, Inge M J Reinieren-Beeren, Lucie M Heinzerling, Harm Westdorp, Irene Stefanini, Luca Beltrame, Stanleyson V Hato, Eva Ellebaek, Stefanie Gross, Van Anh Nguyen, Georg Weinlich, Jiannis Ragoussis, Dilair Baban, Beatrice Schuler-Thurner, Inge M Svane, Nikolaus Romani, Jonathan M Austyn, I Jolanda M De Vries, Gerold Schuler, Duccio Cavalieri, Carl G Figdor
Immunotherapy for metastatic melanoma offers great promise but, to date, only a subset of patients have responded. There is an urgent need to identify ways of allocating patients to the most beneficial therapy, to increase survival and decrease therapy-associated morbidity and costs. Blood-based biomarkers are of particular interest because of their straightforward implementation in routine clinical care. We sought to identify markers for dendritic cell (DC) vaccine-based immunotherapy against metastatic melanoma through gene expression analysis of peripheral blood mononuclear cells...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28698955/role-of-natural-igm-autoantibodies-igm-naa-and-igm-anti-leukocyte-antibodies-igm-ala-in-regulating-inflammation
#10
Peter I Lobo
Natural IgM autoantibodies (IgM-NAA) are rapidly produced to inhibit pathogens and abrogate inflammation mediated by invading microorganisms and host neoantigens. IgM-NAA achieve this difficult task by being polyreactive with low binding affinity but with high avidity, characteristics that allow these antibodies to bind antigenic determinants shared by pathogens and neoantigens. Hence the same clones of natural IgM can bind and mask host neoantigens as well as inhibit microorganisms. In addition, IgM-NAA regulate the inflammatory response via mechanisms involving binding of IgM to apoptotic cells to enhance their removal and binding of IgM to live leukocytes to regulate their function...
July 12, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28687661/a-systems-vaccinology-approach-reveals-temporal-transcriptomic-changes-of-immune-responses-to-the-yellow-fever-17d-vaccine
#11
Jue Hou, Shuhui Wang, Manxue Jia, Dan Li, Ying Liu, Zhengpeng Li, Hong Zhu, Huifang Xu, Meiping Sun, Li Lu, Zhinan Zhou, Hong Peng, Qichen Zhang, Shihong Fu, Guodong Liang, Lena Yao, Xuesong Yu, Lindsay N Carpp, Yunda Huang, Julie McElrath, Steve Self, Yiming Shao
In this study, we used a systems vaccinology approach to identify temporal changes in immune response signatures to the yellow fever (YF)-17D vaccine, with the aim of comprehensively characterizing immune responses associated with protective immunity. We conducted a cohort study in which 21 healthy subjects in China were administered one dose of the YF-17D vaccine; PBMCs were collected at 0 h and then at 4 h and days 1, 2, 3, 5, 7, 14, 28, 84, and 168 postvaccination, and analyzed by transcriptional profiling and immunological assays...
July 7, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28682637/synthesis-and-immunological-studies-of-the-lipomannan-backbone-glycans-found-on-the-surface-of-mycobacterium-tuberculosis
#12
Harin Leelayuwapan, Niwat Kangwanrangsan, Runglawan Chawengkirttikul, Marisa Ponpuak, Ratthaphol Charlermroj, Kanokthip Boonyarattanakalin, Somsak Ruchirawat, Siwarutt Boonyarattanakalin
Investigations into novel bacterial drug targets and vaccines are necessary to overcome tuberculosis. Lipomannan (LM), found on the surface of Mycobacterium tuberculosis (Mtb), is actively involved in the pathogenesis and survival of Mtb. Here, we report for the first time a rapid synthesis and biological activities of an LM glycan backbone, α(1-6)mannans. The rapid synthesis is achieved via a regio- and stereoselective ring opening polymerization to generate multiple glycosidic bonds in one simple chemical step, allowing us to finish assembling the defined polysaccharides of 5-20 units within days rather than years...
July 6, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28680753/efficacy-of-vaccination-with-tumor-exosome-loaded-dendritic-cells-combined-with-cytotoxic-drug-treatment-in-pancreatic-cancer
#13
Li Xiao, Ulrike Erb, Kun Zhao, Thilo Hackert, Margot Zöller
Pancreatic cancer (PaCa) has a dismal prognosis and adjuvant immunotherapy frequently is of low efficacy due to immunosuppressive features of PaCa and PaCa-stroma. We here explored, whether the efficacy of vaccination with tumor-exosome (TEX)-loaded dendritic cells (DC) can be improved by combining with drugs affecting myeloid-derived suppressor cells (MDSC). Experiments were performed with the UNKC6141 PaCa line. UNKC6141 TEX-loaded DC were weekly intravenously injected, mice additionally receiving Gemcitabine (GEM) and/or ATRA and/or Sunitinib (Sun)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28680744/intratumoral-delivery-of-tumor-antigen-loaded-dc-and-tumor-primed-cd4-t-cells-combined-with-agonist-%C3%AE-gitr-mab-promotes-durable-cd8-t-cell-dependent-antitumor-immunity
#14
Zuqiang Liu, Xingxing Hao, Yi Zhang, Jiying Zhang, Cara D Carey, Louis D Falo, Walter J Storkus, Zhaoyang You
The progressive tumor microenvironment (TME) coordinately supports tumor cell expansion and metastasis, while it antagonizes the survival and (poly-)functionality of antitumor T effector cells. There remains a clear need to develop novel therapeutic strategies that can transform the TME into a pro-inflammatory niche that recruits and sustains protective immune cell populations. While intravenous treatment with tumor-primed CD4(+) T cells combined with intraperitoneal delivery of agonist anti-glucocorticoid-induced TNF receptor (α-GITR) mAb results in objective antitumor responses in murine early stage disease models, this approach is ineffective against more advanced tumors...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28680376/dendritic-cell-dysfunction-in-patients-with-end-stage-renal-disease
#15
REVIEW
Ji Ung Kim, Miyeon Kim, Sinae Kim, Tam Thanh Nguyen, Eunhye Kim, Siyoung Lee, Soohyun Kim, Hyunwoo Kim
End-stage renal disease (ESRD) with immune disorder involves complex interactions between the innate and adaptive immune responses. ESRD is associated with various alterations in immune function such as a reduction in polymorphonuclear leukocyte bactericidal activity, a suppression of lymphocyte proliferative response to stimuli, and a malfunction of cell-mediated immunity at the molecular level. ESRD also increases patients' propensity for infections and malignancies as well as causing a diminished response to vaccination...
June 2017: Immune Network
https://www.readbyqxmd.com/read/28666759/a-short-hairpin-rna-based-adjuvant-targeting-nf-%C3%AE%C2%BAb-repressor-i%C3%AE%C2%BAb%C3%AE-promotes-migration-of-dermal-dendritic-cells-to-draining-lymph-nodes-and-antitumor-ctl-responses-induced-by-dna-vaccination
#16
Felipe Gálvez-Cancino, Jonathan Roco, Nicole Rojas-Colonelli, Camila Flores, Paola Murgas, Sebastián Cruz-Gómez, César Oyarce, Manuel Varas-Godoy, Daniela Sauma, Alvaro Lladser
DNA vaccination is an attractive approach to elicit tumor-specific cytotoxic CD8(+) T lymphocytes (CTL), which can mediate protective immunity against tumors. To initiate CTL responses, antigen-encoding plasmids employed for DNA vaccination need to activate dendritic cells (DC) through the stimulation of DNA-sensing innate immune receptors that converge in the activation of the master transcription factor NF-κB. To this end, NF-κB repressor IκBα needs to be degraded, allowing NF-κB to translocate to the nucleus and transcribe proinflammatory target genes, as well as its repressor IκBα...
June 27, 2017: Vaccine
https://www.readbyqxmd.com/read/28666264/antitumor-immunity-induced-by-ve-cadherin-modified-dc-vaccine
#17
Jing Zhou, Yufeng Xi, Xiyan Mu, Rongce Zhao, Hongdou Chen, Li Zhang, Yang Wu, Qiu Li
Dendritic cells (DCs) are the most potent antigen-presenting cells. A strong interest has been developed in DC vaccines for cancer immunotherapy. Besides, angiogenesis is essential for tumor growth. VE-cadherin has a crucial function in various aspects of vascular biological functions. Here, we produced the full VE-cadherin gene modified DC vaccine (DC-VEC). Its antitumor immunity and chief mechanism driving antitumor effect was evaluated. Analyses were performed including test of antitumor antibody, CTL-mediated cytotoxicity experiment, vascular density, evaluation of the variation of cells and cytokines in immunoregulation...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28660480/dendritic-cell-based-immunotherapy-a-basic-review-and-recent-advances
#18
REVIEW
João Constantino, Célia Gomes, Amílcar Falcão, Bruno Miguel Neves, Maria Teresa Cruz
Dendritic cells (DCs) are considered a very promising arm to activate the immune system in immunotherapeutic strategies against cancer. DCs are the most powerful antigen-presenting cells (APCs), being highly efficient at generating robust immune responses. They are also considered the center of the immune system, since they provide a crucial link between both innate and adaptive immune responses. Thus, DC-based cancer immunotherapy aims to take advantage of these unique characteristics of DCs to better fight cancer...
June 28, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28655469/transcutaneous-immunization-with-a-novel-imiquimod-nanoemulsion-induces-superior-t-cell-responses-and-virus-protection
#19
Pamela Aranda Lopez, Mark Denny, Ann-Kathrin Hartmann, Astrid Alflen, Hans Christian Probst, Esther von Stebut, Stefan Tenzer, Hansjörg Schild, Michael Stassen, Peter Langguth, Markus P Radsak
BACKGROUND: Transcutaneous immunization (TCI) is a novel vaccination strategy utilizing the skin associated lymphatic tissue to induce immune responses. TCI using a cytotoxic T lymphocyte (CTL) epitope and the Toll-like receptor 7 (TLR7) agonist imiquimod mounts strong CTL responses by activation and maturation of skin-derived dendritic cells (DCs) and their migration to lymph nodes. However, TCI based on the commercial formulation Aldara only induces transient CTL responses that needs further improvement for the induction of durable therapeutic immune responses...
June 16, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28648976/synergistic-combination-of-murine-bone-marrow-derived-dendritic-cells-loaded-ex-vivo-with-whole-tumor-lysate-and-systemic-chemotherapy-mediates-antitumor-immune-responses-in-vivo
#20
Mohamed L Salem, Mohamed Nassef, Soha Gomaa, Ibrahim Essa
In order to get mature dendritic cells (DC) that is a crucial prerequisite for success in tumor immunotherapy protocols. Herein, we assumed that administration of murine bone marrow (BM)-derived DC (BM-DC), loaded ex vivo with whole Ehrlich ascites carcinoma (EAC) lysate, in the context of systemic chemotherapy cyclophosphamide (CTX) to induce antitumor immune responses, may be a good strategy to improve the presentation of tumor-specific antigens to the immune system. In the first series of experiments, BM cells generated either from BM of naïve mice or from BM of EAC-bearing mice were cultured in the presence of GM-CSF and IL-4 for 6days...
June 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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