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Dendritic cell immunotherapy

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https://www.readbyqxmd.com/read/28440642/asymmetric-silica-nanoparticles-with-tunable-head-tail-structures-enhance-hemocompatibility-and-maturation-of-immune-cells
#1
Prasanna Lakshmi Abbaraju, Anand Kumar Meka, Hao Song, Yannan Yang, Manasi Jambhrunkar, Jun Zhang, Chun Xu, Meihua Yu, Chengzhong Yu
Asymmetric mesoporous silica nanoparticles (MSN) with controllable head-tail structures have been successfully synthesized. The head particle type is tunable (solid or porous) and the tail has dendritic large pores. The tail length and tail coverage on head particles are adjustable. Compared to spherical silica nanoparticles with a solid structure (Stöber spheres) or large-pore symmetrical MSN with fully covered tails, asymmetrical head-tail MSN (HTMSN) show superior hemocompatibility due to reduced membrane deformation of red blood cells and decreased level of reactive oxygen species...
April 25, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28439087/3d-microfluidic-model-for-evaluating-immunotherapy-efficacy-by-tracking-dendritic-cell-behaviour-toward-tumor-cells
#2
Stefania Parlato, Adele De Ninno, Rosa Molfetta, Elena Toschi, Debora Salerno, Arianna Mencattini, Giulia Romagnoli, Alessandra Fragale, Lorenzo Roccazzello, Maria Buoncervello, Irene Canini, Enrico Bentivegna, Mario Falchi, Francesca Romana Bertani, Annamaria Gerardino, Eugenio Martinelli, Corrado Natale, Rossella Paolini, Luca Businaro, Lucia Gabriele
Immunotherapy efficacy relies on the crosstalk within the tumor microenvironment between cancer and dendritic cells (DCs) resulting in the induction of a potent and effective antitumor response. DCs have the specific role of recognizing cancer cells, taking up tumor antigens (Ags) and then migrating to lymph nodes for Ag (cross)-presentation to naïve T cells. Interferon-α-conditioned DCs (IFN-DCs) exhibit marked phagocytic activity and the special ability of inducing Ag-specific T-cell response. Here, we have developed a novel microfluidic platform recreating tightly interconnected cancer and immune systems with specific 3D environmental properties, for tracking human DC behaviour toward tumor cells...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28434942/ipsc-derived-regulatory-dendritic-cells-inhibit-allograft-rejection-by%C3%A2-generating-alloantigen-specific-regulatory-t-cells
#3
Songjie Cai, Jiangang Hou, Masayuki Fujino, Qi Zhang, Naotsugu Ichimaru, Shiro Takahara, Ryoko Araki, Lina Lu, Ji-Mei Chen, Jian Zhuang, Ping Zhu, Xiao-Kang Li
Regulatory dendritic cell (DCregs)-based immunotherapy is a potential therapeutic tool for transplant rejection. We generated DCregs from murine induced pluripotent stem cells (iPSCs), which could remain in a "stable immature stage" even under strong stimulation. Harnessing this characteristic, we hypothesized that iPS-DCregs worked as a negative vaccine to generate regulatory T cells (Tregs), and induced donor-specific allograft acceptance. We immunized naive CBA (H-2K(k)) mice with B6 (H-2K(b)) iPS-DCregs and found that Tregs (CD4(+)CD25(+)FOXP3(+)) significantly increased in CBA splenocytes...
April 18, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28434112/dendritic-cell-based-vaccination-strategy-an-evolving-paradigm
#4
REVIEW
Anna C Filley, Mahua Dey
Malignant gliomas (MG), tumors of glial origin, are the most commonly diagnosed primary intracranial malignancies in adults. Currently available treatments have provided only modest improvements in overall survival and remain limited by inevitable local recurrence, necessitating exploration of novel therapies. Among approaches being investigated, one of the leading contenders is immunotherapy, which aims to modulate immune pathways to stimulate the selective destruction of malignant cells. Dendritic cells (DCs) are potent initiators of adaptive immune responses and therefore crucial players in the development and success of immunotherapy...
April 22, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28431490/new-challenges-in-therapeutic-vaccines-against-hiv-infection
#5
Lorna Leal, Constanza Lucero, Josep M Gatell, Teresa Gallart, Montserrat Plana, Felipe García
There is a growing interest in developing curative strategies for HIV infection. Therapeutic vaccines are one of the most promising approaches. We will review the current knowledge and the new challenges in this research field. Areas covered: PubMed and ClinicalTrial.gov databases were searched to review the progress and prospects for clinical development of immunotherapies aimed to cure HIV infection. Dendritic cells (DC)-based vaccines have yielded the best results in the field. However, major immune-virologic barriers may hamper current vaccine strategies...
April 21, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28423736/laminarin-promotes-anti-cancer-immunity-by-the-maturation-of-dendritic-cells
#6
Kyeongeun Song, Li Xu, Wei Zhang, Yun Cai, Bian Jang, Junghwan Oh, Jun-O Jin
This research evaluates the effects of laminarin on the maturation of dendritic cells and on the in vivo activation of anti-cancer immunity. In vivo treatment of C56BL/6 mice with laminarin increased the expression levels of co-stimulatory molecules and the production of pro-inflammatory cytokines in spleen dendritic cells. Laminarin enhanced ovalbumin antigen presentation in spleen dendritic cells and promoted the proliferation of OT-I and OT-II T cells. Laminarin also induced the maturation of dendritic cells in tumor-draining lymph nodes and protected interferon-γ and tumor necrosis factor-α and proliferation of OT-I and OT-II T cells in tumors...
March 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420805/immunotherapeutic-approaches-for-hepatocellular-carcinoma
#7
Vito Longo, Antonio Gnoni, Andrea Casadei Gardini, Salvatore Pisconti, Antonella Licchetta, Mario Scartozzi, Riccardo Memeo, Vincenzo Ostilio Palmieri, Giuseppe Aprile, Daniele Santini, Patrizia Nardulli, Nicola Silvestris, Oronzo Brunetti
Hepatocellular carcinoma (HCC) is a cancer with a high mortality rate due to the fact that the diagnosis usually occurs at anadvanced stage. Even in case of curative surgical treatment, recurrence is common. Sorafenib and regorafenib are the only therapeutic agents that have been demonstrated to be effective in advanced HCC, thus novel curative approaches are urgently needed. Recent studies focus on the role of immune system in HCC. In fact, the unique immune response in the liver favors tolerance, which can represent a real challenge for conventional immunotherapy in these patients...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417012/coordinating-antigen-cytosolic-delivery-and-danger-signaling-to-program-potent-cross-priming-by-micelle-based-nanovaccine
#8
Zhida Liu, Chang Zhou, Yan Qin, Zihao Wang, Luyao Wang, Xiuli Wei, Yinjian Zhou, Qicheng Li, Hang Zhou, Wenjun Wang, Yang-Xin Fu, Mingzhao Zhu, Wei Liang
Although re-activating cytotoxic T-cell (CTLs) response inside tumor tissues by checkpoint blockade has demonstrated great success in tumor immunotherapy, active induction of efficient endogenous CTL response by therapeutic vaccines has been largely hampered by inefficient cytosolic delivery of antigens and coordinated activation of dendritic cells (DCs) in lymph nodes. Here we show that polyethylene glycol-phosphatidylethanolamine (PEG-PE) micelles transform soluble peptides into α-helix to enable their efficient cytosolic delivery...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28415767/unique-properties-of-thymic-antigen-presenting-cells-promote-epigenetic-imprinting-of-alloantigen-specific-regulatory-t-cells
#9
Garima Garg, Eirini Nikolouli, Matthias Hardtke-Wolenski, Aras Toker, Naganari Ohkura, Michael Beckstette, Takahisa Miyao, Robert Geffers, Stefan Floess, Norbert Gerdes, Esther Lutgens, Anke Osterloh, Shohei Hori, Shimon Sakaguchi, Elmar Jaeckel, Jochen Huehn
Regulatory T cells (Tregs) are potential immunotherapeutic candidates to induce transplantation tolerance. However, stability of Tregs still remains contentious and may potentially restrict their clinical use. Recent work suggested that epigenetic imprinting of Foxp3 and other Treg-specific signature genes is crucial for stabilization of immunosuppressive properties of Foxp3+ Tregs, and that these events are initiated already during early stages of thymic Treg development. However, the mechanisms governing this process remain largely unknown...
March 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414151/targeted-antigen-delivery-to-dendritic-cell-via-functionalized-alginate-nanoparticles-for-cancer-immunotherapy
#10
Chuangnian Zhang, Gaona Shi, Ju Zhang, Huijun Song, Jinfeng Niu, Shengbin Shi, Pingsheng Huang, Yanming Wang, Weiwei Wang, Chen Li, Deling Kong
The purpose of the present study was to identify an "easy-to-adopt" strategy to enhance immune responses using functionalized alginate (ALG) nanoparticles (MAN-ALG/ALG=OVA NPs), which were prepared by CaCl2 cross-linking of two different types of ALG. The mannose (MAN) modified ALG (MAN-ALG) was used for dendritic cell targeting. The other component, composed of ovalbumin (OVA), a model antigen, is conjugated to ALG (ALG=OVA) via pH sensitive Schiff base bond. Grafting of alginate was demonstrated by FT-IR and (1)H NMR, while the morphological structure, particle size, Zeta potential of MAN-ALG/ALG=OVA NPs were measured using TEM and DLS...
April 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28412740/combination-epidermal-growth-factor-receptor-variant-iii-peptide-pulsed-dendritic-cell-vaccine-with-mir-326-results-in-enhanced-killing-on-egfrviii-positive-cells
#11
Jianlong Li, Feng Wang, Guangzhi Wang, Ying Sun, Jinquan Cai, Xing Liu, Junhe Zhang, Xiaoyan Lu, Yongli Li, Meng Chen, Lingchao Chen, Chuanlu Jiang
The mutant Type III variant of epidermal growth factor receptor (EGFRvIII) is present in approximately one-third of glioblastoma (GBM) patients. It is never found in normal tissues; therefore, it represents a candidate target for GBM immunotherapy. PEPvIII, a peptide sequence from EGFRvIII, was designed to represent a target of glioma and is presented by MHC I/II complexes. Dendritic cells (DCs) have great potential to sensitize CD4+ T and CD8+ T cells to precisely target and eradicate GBM. Here, we show that PEPvIII could be loaded by DCs and presented to T lymphocytes, especially PEPvIII-specific CTLs, to precisely kill U87-EGFRvIII cells...
February 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28411378/immune-responses-and-long-term-disease-recurrence-status-after-telomerase-based-dendritic-cell-immunotherapy-in-patients-with-acute-myeloid-leukemia
#12
Hanna J Khoury, Robert H Collins, William Blum, Patrick S Stiff, Laurence Elias, Jane S Lebkowski, Anita Reddy, Kevin P Nishimoto, Debasish Sen, Edward D Wirth, Casey C Case, John F DiPersio
BACKGROUND: Telomerase activity in leukemic blasts frequently is increased among patients with high-risk acute myeloid leukemia (AML). In the current study, the authors evaluated the feasibility, safety, immunogenicity, and therapeutic potential of human telomerase reverse transcriptase (hTERT)-expressing autologous dendritic cells (hTERT-DCs) in adult patients with AML. METHODS: hTERT-DCs were produced from patient-specific leukapheresis, electroporated with an mRNA-encoding hTERT and a lysosomal-targeting sequence, and cryopreserved...
April 14, 2017: Cancer
https://www.readbyqxmd.com/read/28410529/ifn%C3%AE-enhances-cytotoxic-efficiency-of-the-cytotoxic-t-lymphocytes-against-human-glioma-cells
#13
Shengwen Shao, Eric Risch, Danielle Burner, Lingeng Lu, Boris Minev, Wenxue Ma
Cytotoxic T lymphocytes (CTLs) are a key player in cancer immunotherapies, and MHC class I molecules on the cell surface are crucial for cellular recognition. However, the aberrant expression of MHC class I molecules is frequently found in various malignancies. IFNγ has dual functions in cancer progression, and its effect on tumor immunity is controversial. To investigate whether IFNγ can enhance cytotoxic efficiency of the tumor antigen-specific CTLs, we generated the CTLs using modified human dendritic cells as antigen presenting cells, then studied the activities of CTLs on human leukocyte antigen (HLA)-A2 positive glioma cells treated with, or without IFNγ...
April 11, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28410380/interleukin-10-and-prostaglandin-e2-have-complementary-but-distinct-suppressive-effects-on-toll-like-receptor-mediated-dendritic-cell-activation-in-ovarian-carcinoma
#14
Eva Brencicova, Ann L Jagger, Hayley G Evans, Mirella Georgouli, Alex Laios, Steve Attard Montalto, Gautam Mehra, Jo Spencer, Ahmed A Ahmed, Shanti Raju-Kankipati, Leonie S Taams, Sandra S Diebold
Dendritic cells (DC) have the potential to instigate a tumour-specific immune response, but their ability to prime naïve lymphocytes depends on their activation status. Thus, for tumour immunotherapy to be effective, the provision of appropriate DC activation stimuli such as Toll-like receptor (TLR) agonists is crucial in order to overcome immunosuppression associated with the tumour microenvironment. To address this, we investigated how ovarian carcinoma (OC)-associated ascites impedes activation of DC by TLR agonists...
2017: PloS One
https://www.readbyqxmd.com/read/28408841/cytokine-induced-killer-cells-dendritic-cells-and-cytokine-induced-killer-cells-immunotherapy-for-the-treatment-of-esophageal-cancer-in-china-a-meta-analysis
#15
Yan Liu, Ying Mu, Anqi Zhang, Shaoda Ren, Weihua Wang, Jiaping Xie, Yingxin Zhang, Changhui Zhou
BACKGROUND: Immunotherapy based on cytokine-induced killer cells or combination of dendritic cells and cytokine-induced killer cells (CIK/DC-CIK) showed promising clinical outcomes for treating esophageal cancer (EC). However, the clinical benefit varies among previous studies. Therefore, it is necessary to systematically evaluate the curative efficacy and safety of CIK/DC-CIK immunotherapy as an adjuvant therapy for conventional therapeutic strategies in the treatment of EC. MATERIALS AND METHODS: Clinical trials published before October 2016 and reporting CIK/DC-CIK immunotherapy treatment responses or safety for EC were searched in Cochrane Library, EMBASE, PubMed, Wanfang and China National Knowledge Internet databases...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28405517/hematopoietic-stem-cell-derived-myeloid-and-plasmacytoid-dc-based-vaccines-are-highly-potent-inducers-of-tumor-reactive-t-cell-and-nk-cell-responses-ex-vivo
#16
Soley Thordardottir, Nicolaas Schaap, Elja Louer, Michel G D Kester, J H Frederik Falkenburg, Joop Jansen, Timothy R D Radstake, Willemijn Hobo, Harry Dolstra
Because of the potent graft-versus-tumor (GVT) effect, allogeneic stem cell transplantation (alloSCT) can be a curative therapy for hematological malignancies. However, relapse remains the most frequent cause of treatment failure, illustrating the necessity for development of adjuvant post-transplant therapies to boost GVT immunity. Dendritic cell (DC) vaccination is a promising strategy in this respect, in particular, where distinct biologic functions of naturally occurring DC subsets, i.e. myeloid DCs (mDCs) and plasmacytoid DCs (pDCs), are harnessed...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28405516/assessment-of-tumor-infiltrating-tcrv%C3%AE-9v%C3%AE-2-%C3%AE-%C3%AE-lymphocyte-abundance-by-deconvolution-of-human-cancers-microarrays
#17
Marie Tosolini, Frédéric Pont, Mary Poupot, François Vergez, Marie-Laure Nicolau-Travers, David Vermijlen, Jean-Emmanuel Sarry, Francesco Dieli, Jean-Jacques Fournié
Most human blood γδ cells are cytolytic TCRVγ9Vδ2(+) lymphocytes with antitumor activity. They are currently investigated in several clinical trials of cancer immunotherapy but so far, their tumor infiltration has not been systematically explored across human cancers. Novel algorithms allowing the deconvolution of bulk tumor transcriptomes to find the relative proportions of infiltrating leucocytes, such as CIBERSORT, should be appropriate for this aim but in practice they fail to accurately recognize γδ T lymphocytes...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28404886/cytokine-induced-killer-cells-dendritic-cells-cytokine-induced-killer-cells-immunotherapy-combined-with-chemotherapy-for-treatment-of-colorectal-cancer-in-china-a-meta-analysis-of-29-trials-involving-2-610-patients
#18
Lei Zhang, Ying Mu, Anqi Zhang, Jiaping Xie, Shuangfeng Chen, Fang Xu, Weihua Wang, Yingxin Zhang, Shaoda Ren, Changhui Zhou
PURPOSE: To systematically evaluate the efficacy and safety of Cytokine-induced killer cells/dendritic cells-cytokine induced killer cells (CIK/DC-CIK) immunotherapy in treating advanced colorectal cancer (CRC) patients. RESULTS: 29 trials including 2,610 CRC patients were evolved. Compared with chemotherapy alone, the combination of chemotherapy with CIK/DC-CIK immunotherapy significantly prolonged the overall survival rate (OS) and disease-free survival rate (DFS) (1-5 year OS, P < 0...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28399967/type-1-polarised-dendritic-cells-are-a-potent-immunogen-against-mycobacterium-tuberculosis
#19
Y Satake, Y Nakamura, M Kono, H Hozumi, T Nagata, K Tsujimura, N Enomoto, T Fujisawa, N Inui, T Fujiyama, Y Tokura, T Matsui, K Yokomura, M Shirai, H Hayakawa, T Suda
OBJECTIVE: Application of immunotherapy using dendritic cells (DCs) is considered an effective treatment strategy against persistent Mycobacterium tuberculosis infection. With the goal of developing improved therapeutic vaccination strategies for patients with tuberculosis (TB), we tested the ability of ex vivo-generated DCs to induce an effective TB antigen-specific type-1 immune response. METHODS: Monocyte-derived DCs from TB patients were induced to mature using a 'standard' cytokine cocktail (interleukin [IL] 1β, tumour necrosis factor alpha [TNF-α], IL-6 and prostaglandin E2) or a type 1-polarised DC (DC1) cocktail (IL-1β, TNF-α, interferon [IFN] α, IFN-γ and polyinosinic:polycytidylic acid), and were loaded with the established TB antigen 6-kDa early secretory antigenic target protein (ESAT-6)...
May 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28396958/the-function-and-magnetic-resonance-imaging-of-immature-dendritic-cells-under-ultrasmall-superparamagnetic-iron-oxide-uspio-labeling
#20
Wei Zhang, Shuihua Zhang, Wan Xu, Min Zhang, Quan Zhou, Wenli Chen
OBJECTIVE: To investigate the effects of ultrasmall superparamagnetic iron oxide (USPIO) labeling on the maturity or immune tolerance of immature dendritic cells (imDCs) as the success of immunotherapy with immature dendritic cells is highly dependent on immune tolerance. RESULTS: The feasibility of tracking implanted USPIO-labeled imDCs in vivo by magnetic resonance imaging (MRI) was explored. The effects of USPIO labeling on the immune tolerance of imDCs was examined...
April 10, 2017: Biotechnology Letters
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