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Glioma MHC class II

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https://www.readbyqxmd.com/read/28811969/k27m-mutant-histone-3-as-a-novel-target-for-glioma-immunotherapy
#1
Katharina Ochs, Martina Ott, Theresa Bunse, Felix Sahm, Lukas Bunse, Katrin Deumelandt, Jana K Sonner, Melanie Keil, Andreas von Deimling, Wolfgang Wick, Michael Platten
Mutation-specific vaccines have become increasingly important in glioma immunotherapy; however, shared neoepitopes are rare. For diffuse gliomas, a driver mutation in the gene for isocitrate dehydrogenase type-1 has been shown to produce an immunogenic epitope currently targeted in clinical trials. For highly aggressive midline gliomas, a recurrent point mutation in the histone-3 gene (H3F3A) causes an amino acid change from lysine to methionine at position 27 (K27M). Here, we demonstrate that a peptide vaccine against K27M-mutant histone-3 is capable of inducing effective, mutation-specific, cytotoxic T-cell- and T-helper-1-cell-mediated immune responses in a major histocompatibility complex (MHC)-humanized mouse model...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28716484/the-anti-tumor-activity-of-the-stat3-inhibitor-stx-0119-occurs-via-promotion-of-tumor-infiltrating-lymphocyte-accumulation-in-temozolomide-resistant-glioblastoma-cell-line
#2
Yasuto Akiyama, Chizu Nonomura, Tadashi Ashizawa, Akira Iizuka, Ryota Kondou, Haruo Miyata, Takashi Sugino, Koichi Mitsuya, Nakamasa Hayashi, Yoko Nakasu, Akira Asai, Mamoru Ito, Yoshio Kiyohara, Ken Yamaguchi
STAT3 is considered to be a key molecule to mediating tumor-induced immunosuppression in various manners at tumor sites, by acting through immune-regulatory cytokines derived from the tumor cells. Specific anti-STAT3 inhibitors have been developed using nude mouse models transplanted with human tumor cells. However, mouse systems cannot accurately represent the human immune response induced by STAT3 inhibitors, and more humanized therapeutic model based on human immune cells and tumors are needed. In the present study, an immune-deficient NOG mouse with the deletion of both MHC-class I and class II genes, an MHC-double knockout mouse (dKO-NOG), was developed and used to establish humanized immunotherapeutic model...
July 15, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28475775/autocrine-activation-of-the-ifn-signaling-pathway-may-promote-immune-escape-in-glioblastoma
#3
Manuela Silginer, Sara Nagy, Caroline Happold, Hannah Schneider, Michael Weller, Patrick Roth
Background: Interferons (IFNs) are cytokines typically induced upon viral infection but are constitutively expressed also in the absence of acute infection. The physiological role of autocrine and paracrine IFN signaling, however, remains poorly understood, and its function in glioblastoma has not been explored in depth. Methods: Using RNA interference-mediated gene silencing, we characterized constitutive type I IFN signaling and its role in human glioma cells...
October 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28197373/systemic-activation-of-antigen-presenting-cells-via-rna-loaded-nanoparticles
#4
Elias J Sayour, Gabriel De Leon, Christina Pham, Adam Grippin, Hanna Kemeny, Joshua Chua, Jianping Huang, John H Sampson, Luis Sanchez-Perez, Catherine Flores, Duane A Mitchell
While RNA-pulsed dendritic cell (DC) vaccines have shown promise, the advancement of cellular therapeutics is fraught with developmental challenges. To circumvent the challenges of cellular immunotherapeutics, we developed clinically translatable nanoliposomes that can be combined with tumor-derived RNA to generate personalized tumor RNA-nanoparticles (NPs) with considerable scale-up capacity. RNA-NPs bypass MHC restriction, are amenable to central distribution, and can provide near immediate immune induction...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/27835581/regulatory-landscape-and-clinical-implication-of-mbd3-in-human-malignant-glioma
#5
Yi Cui, Jian Li, Ling Weng, Sara E Wirbisky, Jennifer L Freeman, Jingping Liu, Qing Liu, Xianrui Yuan, Joseph Irudayaraj
In this article we inspect the roles and functions of the methyl-CpG-binding domain protein 3 (MBD3) in human malignant glioma, to assess its potential as an epigenetic biomarker for prognosis. The regulatory effects of MBD3 on glioma transcriptome were first profiled by high-throughput microarray. Our results indicate that MBD3 is involved in both transcriptional activation and repression. Furthermore, MBD3 fine-controls a spectrum of proteins critical for cellular metabolism and proliferation, thereby contributing to an exquisite anti-glioma network...
December 6, 2016: Oncotarget
https://www.readbyqxmd.com/read/26597758/tnf%C3%AE-driven-hif-1%C3%AE-hexokinase-ii-axis-regulates-mhc-i-cluster-stability-through-actin-cytoskeleton
#6
Sadashib Ghosh, Piyushi Gupta, Ellora Sen
Hypoxia-inducible Factor-1α (HIF-1α)-regulated expression of Hexokinase-II (HKII) remains a cornerstone in the maintenance of high metabolic demands subserving various pro-tumor functions including immune evasion in gliomas. Since inflammation-induced HIF-1α regulates Major Histocompatibility Complex class I (MHC-I) gene expression, and as cytoskeletal dynamics affect MHC-I membrane clusters, we investigated the involvement of HIF-1α-HKII axis in Tumor Necrosis Factor-α (TNFα)-mediated MHC-I membrane cluster stability in glioma cells and the involvement of actin cytoskeleton in the process...
January 1, 2016: Experimental Cell Research
https://www.readbyqxmd.com/read/25964867/mutant-idh1-an-immunotherapeutic-target-in-tumors
#7
Theresa Schumacher, Lukas Bunse, Wolfgang Wick, Michael Platten
The discovery of driver mutations in cancers has raised interest in their suitability as immunotherapeutic targets. A recent study demonstrates that a point mutation in isocitrate dehydrogenase 1 (IDH1R132H), expressed in gliomas and other tumors, is presented on human MHC class II and induces a mutation-specific CD4(+) antitumor T cell response in patients and a syngeneic tumor model in MHC-humanized mice.
December 2014: Oncoimmunology
https://www.readbyqxmd.com/read/25901754/screening-of-differentially-expressed-genes-associated-with-human-glioblastoma-and-functional-analysis-using-a-dna-microarray
#8
Lina Wang, Bo Wei, Guozhang Hu, Le Wang, Miaomiao Bi, Zhigang Sun, Ying Jin
Glioblastoma multiforme (GBM) is the most malignant type of human glioma, and has a poor prognosis. Screening differentially expressed genes (DEGs) in brain tumor samples and normal brain samples is of importance for identifying GBM and to design specific-targeting drugs. The transcriptional profile of GSE30563, containing three genechips of brain tumor samples and three genechips of normal brain samples, was downloaded from Gene Expression Omnibus to identify the DEGs. The differences in the expression of the DEGs in the two different samples were compared through hierarchical biclustering...
August 2015: Molecular Medicine Reports
https://www.readbyqxmd.com/read/25555220/proximity-ligation-assay-evaluates-idh1r132h-presentation-in-gliomas
#9
MULTICENTER STUDY
Lukas Bunse, Theresa Schumacher, Felix Sahm, Stefan Pusch, Iris Oezen, Katharina Rauschenbach, Marina Gonzalez, Gergely Solecki, Matthias Osswald, David Capper, Benedikt Wiestler, Frank Winkler, Christel Herold-Mende, Andreas von Deimling, Wolfgang Wick, Michael Platten
For a targeted cancer vaccine to be effective, the antigen of interest needs to be naturally processed and presented on MHC by the target cell or an antigen-presenting cell (APC) in the tumor stroma. The presence of these characteristics is often assumed based on animal models, evaluation of antigen-overexpressing APCs in vitro, or assays of material-consuming immune precipitation from fresh solid tissue. Here, we evaluated the use of an alternative approach that uses the proximity ligation assay (PLA) to identify the presentation of an MHC class II-restricted antigen in paraffin-embedded tissue sections from patients with brain tumors...
February 2015: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/25086876/intratumorally-implanted-mesenchymal-stromal-cells-potentiate-peripheral-immunotherapy-against-malignant-rat-gliomas
#10
Salina Ströjby, Sofia Eberstål, Andreas Svensson, Sara Fritzell, Daniel Bexell, Peter Siesjö, Anna Darabi, Johan Bengzon
Bone marrow-derived mesenchymal stromal cells (MSCs) target glioma extensions and micro-satellites efficiently when implanted intratumorally. Here, we report that intratumoral implantation of MSCs and peripheral immunotherapy with interferon-gamma (IFNγ) producing tumor cells improve the survival of glioma-bearing rats (54% cure rate) compared to MSC alone (0% cure rate) or immunotherapy alone (21% cure rate) by enforcing an intratumoral CD8(+) T cell response. Further analysis revealed that the MSCs up-regulate MHC classes I and II in response to IFNγ treatment in vitro and secrete low amounts of immunosuppressive molecules prostaglandin E2 and interleukin-10...
September 15, 2014: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/25043048/a-vaccine-targeting-mutant-idh1-induces-antitumour-immunity
#11
Theresa Schumacher, Lukas Bunse, Stefan Pusch, Felix Sahm, Benedikt Wiestler, Jasmin Quandt, Oliver Menn, Matthias Osswald, Iris Oezen, Martina Ott, Melanie Keil, Jörg Balß, Katharina Rauschenbach, Agnieszka K Grabowska, Isabel Vogler, Jan Diekmann, Nico Trautwein, Stefan B Eichmüller, Jürgen Okun, Stefan Stevanović, Angelika B Riemer, Ugur Sahin, Manuel A Friese, Philipp Beckhove, Andreas von Deimling, Wolfgang Wick, Michael Platten
Monoallelic point mutations of isocitrate dehydrogenase type 1 (IDH1) are an early and defining event in the development of a subgroup of gliomas and other types of tumour. They almost uniformly occur in the critical arginine residue (Arg 132) in the catalytic pocket, resulting in a neomorphic enzymatic function, production of the oncometabolite 2-hydroxyglutarate (2-HG), genomic hypermethylation, genetic instability and malignant transformation. More than 70% of diffuse grade II and grade III gliomas carry the most frequent mutation, IDH1(R132H) (ref...
August 21, 2014: Nature
https://www.readbyqxmd.com/read/24391709/early-gene-expression-analysis-in-9l-orthotopic-tumor-bearing-rats-identifies-immune-modulation-in-molecular-response-to-synchrotron-microbeam-radiation-therapy
#12
Audrey Bouchet, Nathalie Sakakini, Michèle El Atifi, Céline Le Clec'h, Elke Brauer, Anaïck Moisan, Pierre Deman, Pascal Rihet, Géraldine Le Duc, Laurent Pelletier
Synchrotron Microbeam Radiation Therapy (MRT) relies on the spatial fractionation of the synchrotron photon beam into parallel micro-beams applying several hundred of grays in their paths. Several works have reported the therapeutic interest of the radiotherapy modality at preclinical level, but biological mechanisms responsible for the described efficacy are not fully understood to date. The aim of this study was to identify the early transcriptomic responses of normal brain and glioma tissue in rats after MRT irradiation (400Gy)...
2013: PloS One
https://www.readbyqxmd.com/read/20422411/antitumor-cytotoxic-t-cell-response-induced-by-a-survivin-peptide-mimic
#13
Michael J Ciesielski, Manmeet S Ahluwalia, Stephan A Munich, Molly Orton, Tara Barone, Asher Chanan-Khan, Robert A Fenstermaker
Survivin is a tumor-associated antigen with significant potential as a cancer vaccine target. We have identified a survivin peptide mimic containing human MHC class I epitopes and a potential class II ligand that induces a potent antitumor response in C57BL/6 mice with GL261 cerebral gliomas. This peptide is able to elicit both CD8+ CTL and T helper cell responses in C57BL/6 mice. The corresponding region of the human survivin molecule represented by peptide SVN53-67 is 100% homologous to the murine protein, but SVN53-67 is weakly immunogenic in man...
August 2010: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/19798500/increase-in-tumor-size-following-intratumoral-injection-of-immunostimulatory-cpg-containing-oligonucleotides-in-a-rat-glioma-model
#14
Christian Ginzkey, Sven O Eicker, Matthias Marget, Joerg Krause, Stephan Brecht, Manfred Westphal, Hans H Hugo, H M Mehdorn, Joerg Steinmann, Wolfgang Hamel
The immunosuppressive environment of malignant gliomas is likely to suppress the anti-tumor activity of infiltrating microglial cells and lymphocytes. Macrophages and microglial cells may be activated by oligonucleotides containing unmethylated CpG-motifs, although their value in cancer immunotherapy has remained controversial. Following injection of CpG-containing oligonucleotides (ODN) into normal rat brain, we observed a local inflammatory response with CD8+ T cell infiltration, upregulation of MHC 2, and ED1 expression proving the immunogenic capacity of the CpG-ODN used...
April 2010: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/19523342/recent-advances-of-dendritic-cells-dcs-based-immunotherapy-for-malignant-gliomas
#15
REVIEW
Der-Yang Cho, Shinn-Zong Lin, Wen-Kuang Yang, Den-Mei Hsu, Han-Chung Lee, Wen-Yeun Lee, Shih-Ping Liu
Immunotherapy is a new light of hope for the treatment of malignant gliomas. The brain is no longer believed to be an immunologically privileged organ. The major advantage of immunotherapy is the tumor-specific cytotoxic effect on the tumor cells with minimal side effects. Autologous dendritic cells (DCs)-based immunotherapy is a promising and feasible method. DCs are the most potent antigen-presenting cells (APCs). DCs prime T lymphocytes by epitopic major histocompatibility (MHC) class I and II for CD8(+) cytotoxic T lymphocytes (CTLs) and CD4(+) T helper cells, respectively...
2009: Cell Transplantation
https://www.readbyqxmd.com/read/17823798/improving-alloreactive-ctl-immunotherapy-for-malignant-gliomas-using-a-simulation-model-of-their-interactive-dynamics
#16
Natalie Kronik, Yuri Kogan, Vladimir Vainstein, Zvia Agur
Glioblastoma (GBM), a highly aggressive (WHO grade IV) primary brain tumor, is refractory to traditional treatments, such as surgery, radiation or chemotherapy. This study aims at aiding in the design of more efficacious GBM therapies. We constructed a mathematical model for glioma and the immune system interactions, that may ensue upon direct intra-tumoral administration of ex vivo activated alloreactive cytotoxic-T-lymphocytes (aCTL). Our model encompasses considerations of the interactive dynamics of aCTL, tumor cells, major histocompatibility complex (MHC) class I and MHC class II molecules, as well as cytokines, such as TGF-beta and IFN-gamma, which dampen or increase the pro-inflammatory environment, respectively...
March 2008: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/17440064/shared-mhc-class-ii-dependent-melanoma-ribosomal-protein-l8-identified-by-phage-display
#17
Rolf K Swoboda, Rajasekharan Somasundaram, Laura Caputo, Elizabeth M Ochoa, Phyllis A Gimotty, Francesco M Marincola, Patricia Van Belle, Stephen Barth, David Elder, DuPont Guerry, Brian Czerniecki, Lynn Schuchter, Robert H Vonderheide, Dorothee Herlyn
Antigens recognized by T helper (Th) cells in the context of MHC class II molecules have vaccine potential against cancer and infectious agents. We have described previously a melanoma patient's HLA-DR7-restricted Th cell clone recognizing an antigen, which is shared among melanoma and glioma cells derived from various patients. Here, this antigen was cloned using a novel antigen phage display approach. The antigen was identified as the ribosomal protein L8 (RPL8). A peptide of RPL8 significantly stimulated proliferation and/or cytokine expression of the Th cell clone and lymphocytes in four of nine HLA-DR7(+) melanoma patients but not in healthy volunteers...
April 15, 2007: Cancer Research
https://www.readbyqxmd.com/read/17432716/antitumor-effects-of-vaccination-with-dendritic-cells-transfected-with-modified-receptor-for-hyaluronan-mediated-motility-mrna-in-a-mouse-glioma-model
#18
Takayuki Amano, Koji Kajiwara, Koichi Yoshikawa, Jun Morioka, Sadahiro Nomura, Hirosuke Fujisawa, Shoichi Kato, Masami Fujii, Mikiko Fukui, Yuji Hinoda, Michiyasu Suzuki
OBJECT: The receptor for hyaluronan-mediated motility (RHAMM) is frequently overexpressed in brain tumors and was recently identified as an immunogenic antigen by using serological screening of cDNA expression libraries. In this study, which was conducted using a mouse glioma model, the authors tested the hypothesis that vaccination with dendritic cells transfected with RHAMM mRNA induces strong immunological antitumor effects. METHODS: The authors constructed a plasmid for transduction of the mRNAs transcribed in vitro into dendritic cells, which were then used to transport the intracellular protein RHAMM efficiently into major histocompatibility complex class II compartments by adding a late endosomal-lysosomal sorting signal to the RHAMM gene...
April 2007: Journal of Neurosurgery
https://www.readbyqxmd.com/read/17228265/microglia-in-gemistocytic-astrocytomas
#19
Fatemeh Geranmayeh, Bernd W Scheithauer, Christoph Spitzer, Fredric B Meyer, Ann-Cathrin Svensson-Engwall, Manuel B Graeber
OBJECTIVE: Although gemistocytic astrocytomas are graded as World Health Organization II astrocytomas, they behave more aggressively than other astrocytomas. Their proliferative potential is low, and it remains an intriguing question why these tumors are so biologically "successful." They show a high mutation rate of the P53 gene, cytological abnormalities, and frequent perivascular mononuclear infiltrates. Microglial cells, a feature of this astrocytoma variant, are of increasing interest in the context of glioma growth...
January 2007: Neurosurgery
https://www.readbyqxmd.com/read/17106649/toll-like-receptor-triggered-dendritic-cell-maturation-and-il-12-secretion-are-necessary-to-overcome-t-cell-inhibition-by-glioma-associated-tgf-beta2
#20
Oliver Grauer, Peter Pöschl, Annette Lohmeier, Gosse J Adema, Ulrich Bogdahn
Malignant gliomas are able to secrete large amounts of immunosuppressive cytokines like transforming growth factor beta 2 (TGF-beta2) and regularly escape from immune surveillance. Many strategies have been developed to induce potent anti-glioma responses, among those the use of dendritic cells (DC) as therapeutic vaccines. Here, we report that both mature DC and IL-12 secretion are necessary to overcome T-cell inhibition by TGF-beta2. Flow cytometric analyses showed that TGF-beta2 does not suppress the upregulation of MHC (major histocompatibility complex) class II molecules and the T cell stimulatory capacity of human DC that were stimulated with a strong cytokine cocktail containing tumor necrosis factor alpha (TNF-alpha), IL-1beta, IL-6 and prostaglandin E2 (PGE2)...
April 2007: Journal of Neuro-oncology
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