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Dendritic cell immunotherapy

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https://www.readbyqxmd.com/read/28536100/depletion-of-tumor-associated-macrophages-with-a-csf-1r-kinase-inhibitor-enhances-antitumor-immunity-and-survival-induced-by-dc-immunotherapy
#1
Floris Dammeijer, Lysanne A Lievense, Margaretha E H Kaijen-Lambers, Menno van Nimwegen, Koen Bezemer, Joost P Hegmans, Thorbald van Hall, Rudi W Hendriks, Joachim G Aerts
New immunotherapeutic strategies are needed to induce effective anti-tumor immunity in all cancer patients. Malignant mesothelioma is characterized by a poor prognosis and resistance to conventional therapies. Infiltration of tumor-associated macrophages (TAM) is prominent in mesothelioma and is linked to immune suppression, angiogenesis and tumor aggressiveness. Therefore, TAM depletion could potentially reactivate anti-tumor immunity. We show that M-CSFR-inhibition using the CSF-1R kinase inhibitor PLX3397 (pexidartinib) effectively reduced numbers of TAMs, circulating nonclassical monocytes, as well as amount of neo-angiogenesis and ascites in mesothelioma mouse models, but did not improve survival...
May 23, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28526557/the-frog-skin-host-defense-peptide-frenatin-2-1s-enhances-recruitment-activation-and-tumoricidal-capacity-of-nk-cells
#2
Jelena M Pantic, Ivan P Jovanovic, Gordana D Radosavljevic, Nevena M Gajovic, Nebojsa N Arsenijevic, J Michael Conlon, Miodrag L Lukic
Frog skin is a source of peptides with various biological properties. Frenatin 2.1S, derived from norepinephrine-stimulated skin secretions of the Orinoco lime tree frog Sphaenorhynchus lacteus, exhibits immunostimulatory effects as demonstrated by the promotion of proinflammatory phenotypes of mononuclear cells in mouse peritoneal cavity and spleen. The aim of this study was to identify the populations of host cells sensitive to the action of frenatin 2.1S in vivo and to study its effects on their functional antitumor capacity...
May 16, 2017: Peptides
https://www.readbyqxmd.com/read/28521905/harnessing-the-properties-of-dendritic-cells-in-the-pursuit-of-immunological-tolerance
#3
REVIEW
Christopher Horton, Kumaran Shanmugarajah, Paul J Fairchild
The acquisition of self-perpetuating, immunological tolerance specific for graft alloantigens has long been described as the "holy grail" of clinical transplantation. By removing the need for life-long immunosuppression following engraftment, the adverse consequences of immunosuppressive regimens, including chronic infections and malignancy, may be avoided. Furthermore, autoimmune diseases and allergy are, by definition, driven by aberrant immunological responses to ordinarily innocuous antigens. The re-establishment of permanent tolerance towards instigating antigens may, therefore, provide a cure to these common diseases...
April 2017: Biomedical Journal
https://www.readbyqxmd.com/read/28521478/enhancement-of-antitumor-immunity-by-combination-of-anti-ctla-4-antibody-and-radioimmunotherapy-through-the-suppression-of-tregs
#4
Cheol-Hun Son, Jaeho Bae, Hong-Rae Lee, Kwangmo Yang, You-Soo Park
Cytotoxic T lymphocyte antigen-4 (CTLA-4) is expressed during cluster of differentiation (CD)4+ T-cell activation and terminates immune responses by interrupting CD28-enhanced activation. In addition, CTLA-4 is known to be constitutively expressed in regulatory T-cells (Tregs) and to contribute to immune suppression by enhancing the suppressive function of Tregs. However, the molecular mechanisms underlying CTLA-4-mediated Treg suppression remains incompletely understood. Furthermore, it is uncertain whether the in vivo immune suppressive functions of CTLA-4 are mediated only by a reduction in the level of conventional T-cell activity, or enhancement of Treg function...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28512646/mri-in-glioma-immunotherapy-evidence-pitfalls-and-perspectives
#5
REVIEW
Domenico Aquino, Andrea Gioppo, Gaetano Finocchiaro, Maria Grazia Bruzzone, Valeria Cuccarini
Pseudophenomena, that is, imaging alterations due to therapy rather than tumor evolution, have an important impact on the management of glioma patients and the results of clinical trials. RANO (response assessment in neurooncology) criteria, including conventional MRI (cMRI), addressed the issues of pseudoprogression after radiotherapy and concomitant chemotherapy and pseudoresponse during antiangiogenic therapy of glioblastomas (GBM) and other gliomas. The development of cancer immunotherapy forced the identification of further relevant response criteria, summarized by the iRANO working group in 2015...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28512265/chaetocin-enhances-dendritic-cell-function-via-the-induction-of-heat-shock-protein-and-cancer-testis-antigens-in-myeloma-cells
#6
Manh-Cuong Vo, Thanh-Nhan Nguyen-Pham, Hyun-Ju Lee, Sung-Hoon Jung, Nu-Ri Choi, My-Dung Hoang, Hyeoung-Joon Kim, Je-Jung Lee
Dendritic cells (DC)-based vaccines are considered useful in cancer immuno-therapy, and the interactions of DC and dying tumor cells are important and promising for cancer immunotherapy. We investigated whether chaetocin could be used to induce death of myeloma cells, for loading onto DCs can affect DCs function. In this study, we show that the dying myeloma cells treated with chaetocin resulted in the induction of heat shock protein (HSP) 90, which was inhibited by antioxidant N-acetyl cysteine, and showed an increase in the expression of MAGE-A3 and MAGE-C1/CT7...
April 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28508448/a-novel-multi-epitope-vaccine-from-mmsa-1-and-dkk1-for-multiple-myeloma-immunotherapy
#7
Chenyang Lu, Shan Meng, Yanxia Jin, Wanggang Zhang, Zongfang Li, Fang Wang, Feng Wang-Johanning, Yongchang Wei, Hailing Liu, Honglei Tu, Dan Su, Aili He, Xingmei Cao, Fuling Zhou
The identification of novel tumour-associated antigens is urgently needed to improve the efficacy of immunotherapy for multiple myeloma (MM). In this study, we identified a membrane protein MMSA-1 (multiple myeloma special antigen-1) that was specifically expressed in MM and exhibited significantly positive correlation with MM. We then identified HLA-A*0201-restricted MMSA-1 epitopes and tested their cytotoxic T lymphocyte (CTL) response. The MMSA-1 epitope SLSLLTIYV vaccine was shown to induce an obvious CTL response in vitro...
May 16, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28507788/adaptive-t-cell-responses-induced-by-oncolytic-herpes-simplex-virus-granulocyte-macrophage-colony-stimulating-factor-therapy-expanded-by-dendritic-cell-and-cytokine-induced-killer-cell-adoptive-therapy
#8
Jun Ren, William R Gwin, Xinna Zhou, Xiaoli Wang, Hongyan Huang, Ni Jiang, Lei Zhou, Pankaj Agarwal, Amy Hobeika, Erika Crosby, Zachary C Hartman, Michael A Morse, Kevin H Eng, H Kim Lyerly
Purpose: Although local oncolytic viral therapy (OVT) may enhance tumor lysis, antigen release, and adaptive immune responses, systemic antitumor responses post-therapy are limited. Adoptive immunotherapy with autologous dendritic cells (DC) and cytokine-induced killer cells (DC-CIK) synergizes with systemic therapies. We hypothesized that OVT with Herpes Simplex Virus-granulocyte macrophage-colony-stimulating factor (HSV-GM-CSF) would induce adaptive T cell responses that could be expanded systemically with sequential DC-CIK therapy...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28503405/nanoparticle-design-strategies-for-effective-cancer-immunotherapy
#9
Praveena Velpurisiva, Aniket Gad, Brandon Piel, Rahul Jadia, Prakash Rai
Cancer immunotherapy is a rapidly evolving and paradigm shifting treatment modality that adds a strong tool to the collective cancer treatment arsenal. It can be effective even for late stage diagnoses and has already received clinical approval. Tumors are known to not only avoid immune surveillance but also exploit the immune system to continue local tumor growth and metastasis. Because of this, most immunotherapies, particularly those directed against solid cancers, have thus far only benefited a small minority of patients...
2017: J Biomed (Syd)
https://www.readbyqxmd.com/read/28501765/enhanced-sublingual-immunotherapy-by-tat-fused-recombinant-allergen-in-a-murine-rhinitis-model
#10
Farhad Salari, Fatemeh Vahedi, Abdol-Reza Varasteh, Hanieh Ketabdar, Jamshidkhan Chamani, Mojtaba Sankian
Allergen-specific sublingual immunotherapy (SLIT) is well known as an effective and non-invasive route to induce allergy desensitization. The goal of this study was to investigate whether a TAT-fused recombinant allergen could enhance SLIT efficacy. BALB/c mice sensitized to the main allergen (Che a 3) of Chenopodium album pollen were treated sublingually either with rChe a 3 (100μg/dose) or rTAT-Che a 3 (100μg/dose), two times per week for eight weeks. SLIT with rTAT-Che a 3 led to significantly greater allergen-specific IgG2a than rChe a 3; however, neither rTAT-Che a 3 nor rChe a 3 affected allergen-specific IgE or IgG1 antibody levels...
May 11, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28499389/a-phase-ii-trial-of-autologous-dendritic-cell-vaccination-and-radiochemotherapy-following-fluorescence-guided-surgery-in-newly-diagnosed-glioblastoma-patients
#11
Susana Inogés, Sonia Tejada, Ascensión López-Díaz de Cerio, Jaime Gállego Pérez-Larraya, Jaime Espinós, Miguel Angel Idoate, Pablo Daniel Domínguez, Reyes García de Eulate, Javier Aristu, Maurizio Bendandi, Fernando Pastor, Marta Alonso, Enrique Andreu, Felipe Prósper Cardoso, Ricardo Díez Valle
BACKGROUND: Prognosis of patients with glioblastoma multiforme (GBM) remains dismal, with median overall survival (OS) of about 15 months. It is therefore crucial to search alternative strategies that improve these results obtained with conventional treatments. In this context, immunotherapy seems to be a promising therapeutic option. We hypothesized that the addition of tumor lysate-pulsed autologous dendritic cells (DCs) vaccination to maximal safe resection followed by radiotherapy and concomitant and adjuvant temozolomide could improve patients' survival...
May 12, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28497804/vaccine-based-immunotherapeutic-approaches-to-gliomas-and-beyond
#12
REVIEW
Michael Weller, Patrick Roth, Matthias Preusser, Wolfgang Wick, David A Reardon, Michael Platten, John H Sampson
Astrocytic and oligodendroglial gliomas are intrinsic brain tumours characterized by infiltrative growth and resistance to classic cancer therapies, which renders them inevitably lethal. Glioblastoma, the most common type of glioma, also exhibits neoangiogenesis and profound immunosuppressive properties. Accordingly, strategies to revert glioma-associated immunosuppression and promote tumour-directed immune responses have been extensively explored in rodent models and in large clinical trials of tumour immunotherapy...
May 12, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28497578/effector-and-regulatory-dendritic-cells-display-distinct-patterns-of-mirna-expression
#13
Vincent Lombardi, Sonia Luce, Hélène Moussu, Lise Morizur, Claire Gueguen, Catherine Neukirch, Sylvie Chollet-Martin, Laurent Mascarell, Michel Aubier, Véronique Baron-Bodo, Philippe Moingeon
INTRODUCTION: MicroRNAs (miRNAs) contribute to the regulation of dendritic cell (DC) polarization, thereby influencing the balance of adaptive immune responses. Herein, we studied the expression of miRNAs in polarized DCs and analyzed whether expression of these miRNAs could be associated with allergic rhinitis and allergen immunotherapy (AIT) outcome. METHOD: Using specific culture conditions, we differentiated immature human monocyte-derived DCs into DC1, DC2, and DCreg subsets (supporting the differentiation of TH 1, TH 2 or regulatory T cells, respectively)...
May 12, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28495513/high-hydrostatic-pressure-affects-antigenic-pool-in-tumor-cells-implication-for-dendritic-cell-based-cancer-immunotherapy
#14
Linda Urbanova, Nada Hradilova, Irena Moserova, Sarka Vosahlikova, Lenka Sadilkova, Michal Hensler, Radek Spisek, Irena Adkins
High hydrostatic pressure (HHP) can be used to generate dendritic cell (DC)-based active immunotherapy for prostate, lung and ovarian cancer. We showed here that HHP treatment of selected human cancer cell lines leads to a degradation of tumor antigens which depends on the magnitude of HHP applied and on the cancer cell line origin. Whereas prostate or ovarian cell lines displayed little protein antigen degradation with HHP treatment up to 300MPa after 2h, tumor antigens are hardly detected in lung cancer cell line after treatment with HHP 250MPa at the same time...
May 8, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28488122/the-potential-of-cellular-and-viral-based-immunotherapies-for-malignant-glioma-dendritic-cell-vaccines-adoptive-cell-transfer-and-oncolytic-viruses
#15
REVIEW
Russell Maxwell, Andrew S Luksik, Tomas Garzon-Muvdi, Michael Lim
PURPOSE OF REVIEW: Malignant gliomas, including glioblastoma and anaplastic astrocytoma, are the most frequent primary brain tumors and present with many treatment challenges. In this review, we discuss the potential of cellular- and viral-based immunotherapies in the treatment of malignant glioma, specifically focusing on dendritic cell vaccines, adoptive cell therapy, and oncolytic viruses. RECENT FINDINGS: Diverse cellular- and viral-based strategies have been engineered and optimized to generate either a specific or broad antitumor immune response in malignant glioma...
June 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28486102/tumor-microenvironment-no-effector-t-cells-without-dendritic-cells
#16
Christina Pfirschke, Marie Siwicki, Hsin-Wei Liao, Mikael J Pittet
Successful antitumor immunity is thought to require T cell entry into tumors, though mechanisms regulating this process remain unclear. In this issue of Cancer Cell, Spranger et al. indicate that chemokines produced by intratumoral Batf3 dendritic cells are critical for effector T cell recruitment. The findings have implications for immunotherapy.
May 8, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28480589/quantification-and-tracking-of-genetically-engineered-dendritic-cells-for-studying-immunotherapy
#17
Amnon Bar-Shir, Lina Alon, Michael J Korrer, Hong Seo Lim, Nirbhay N Yadav, Yoshinori Kato, Arvind P Pathak, Jeff W M Bulte, Assaf A Gilad
PURPOSE: Genetically encoded reporters can assist in visualizing biological processes in live organisms and have been proposed for longitudinal and noninvasive tracking of therapeutic cells in deep tissue. Cells can be labeled in situ or ex vivo and followed in live subjects over time. Nevertheless, a major challenge for reporter systems is to identify the cell population that actually expresses an active reporter. METHODS: We have used a nucleoside analog, pyrrolo-2'-deoxycytidine, as an imaging probe for the putative reporter gene, Drosophila melanogaster 2'-deoxynucleoside kinase...
May 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28471481/cytotoxic-lymphocytes-and-atherosclerosis-significance-mechanisms-and-therapeutic-challenges
#18
Tin Kyaw, Karlheinz Peter, Li Yi, Peter Tipping, Ban-Hock Toh, Alex Bobik
Cytotoxic lymphocytes encompass natural killer (NK) lymphocytes (cells) and cytotoxic T cells that include CD8+ T cells, NKT cells, gamma, delta (γδ)-T cells and human CD4 + CD28- T cells. These cells play critical roles in inflammatory diseases and in controlling cancers and infections. Cytotoxic lymphocytes can be activated via a number of mechanisms that may involve dendritic cells, macrophages, cytokines or surface proteins on stressed cells. Upon activation, they secrete proinflammatory cytokines as well as anti-inflammatory cytokines, chemokines and cytotoxins to promote inflammation and development of atherosclerotic lesions including vulnerable lesions, which are strongly implicated in myocardial infarctions and strokes...
May 4, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28461074/vitamin-d-endocrinology-on-the-cross-road-between-immunity-and-metabolism
#19
REVIEW
An-Sofie Vanherwegen, Conny Gysemans, Chantal Mathieu
The effects of vitamin D on the immune function have been recognized for more than a quarter of a century. However, our understanding of the multifactorial nature of the effects of vitamin D at the cellular, molecular and metabolic level in different immune subsets of the innate and adaptive system has dramatically progressed during the last decades. In this review, we summarize the main metabolic pathways preferentially used in different subsets of T cells, B cells, macrophages and dendritic cells as well as the immunomodulatory effects of vitamin D on these cells...
April 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28457810/chronic-stress-suppresses-anti-tumor-tcd8-responses-and-tumor-regression-following-cancer-immunotherapy-in-a-mouse-model-of-melanoma
#20
Annette Sommershof, Lisa Scheuermann, Julia Koerner, Marcus Groettrup
Animal tumor models and human cancer studies have provided convergent evidence that chronic psychological stress plays a decisive role in modulating anti-tumor T cell immunity. However, whether chronic stress also affects anti-cancer vaccine strategies that rely on the induction of functional tumor-specific TCD8+ cells has not been investigated yet. In this study we provide direct evidence that chronic stress suppresses the therapeutic efficacy of a biodegradable poly(d,l-lactide-co-glycolide) microsphere (PLGA-MS) based cancer vaccine in a murine melanoma model...
April 27, 2017: Brain, Behavior, and Immunity
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