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https://www.readbyqxmd.com/read/29332456/the-combined-antitumor-effects-of-125i-radioactive-particle-implantation-and-cytokine-induced-killer-cell-therapy-on-xenograft-hepatocellular-carcinoma-in-a-mouse-model
#1
Junyong Zhang, Nian Wu, Zhengrong Lian, Huyi Feng, Qing Jiang, Xianfeng Chen, Jianping Gong, Zhengrong Qiao
The combination of radiotherapy and immunotherapy has shown great promise in eradicating tumors. For example, 125I radioactive particle implantation and cytokine-induced killer cell therapies have demonstrated efficacy in treating hepatocellular carcinoma. However, the mechanism of this combination therapy remains unknown. In this study, we utilized cytokine-induced killer cells obtained from human peripheral blood mononuclear cells along with 125I radioactive particle implantation to treat subcutaneous hepatocellular carcinoma xenograft tumors in BALB/c nude mice...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29331515/mhc-class-i-loaded-ligands-from-breast-cancer-cell-lines-a-potential-hla-i-typed-antigen-collection
#2
Dmitri V Rozanov, Nikita D Rozanov, Kami Chiotti, Ashok Reddy, Phillip A Wilmarth, Larry L David, Seung W Cha, Sunghee Woo, Pavel Pevzner, Vineet Bafna, Gregory G Burrows, Juha K Rantala, Trevor Levin, Pavana Anur, Katie Johnson-Camacho, Shaadi Tabatabaei, Daniel J Munson, Tullia C Bruno, Jill E Slansky, John W Kappler, Naoto Hirano, Sebastian Boegel, Bernard A Fox, Colt Egelston, Diana L Simons, Grecia Jimenez, Peter P Lee, Joe W Gray, Paul T Spellman
To build a catalog of peptides presented by breast cancer cells, we undertook systematic MHC class I immunoprecipitation followed by elution of MHC class I-loaded peptides in breast cancer cells. We determined the sequence of 3196 MHC class I ligands representing 1921 proteins from a panel of 20 breast cancer cell lines. After removing duplicate peptides, i.e., the same peptide eluted from more than one cell line, the total number of unique peptides was 2740. Of the unique peptides eluted, more than 1750 had been previously identified, and of these, sixteen have been shown to be immunogenic...
January 10, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29315166/exercise-protects-against-cancer-induced-cardiac-cachexia
#3
Traci L Parry, Reid Hayward
Cancer has been shown to negatively stimulate autophagy, leading to declines in cardiac function. While exercise is cardioprotective, its influence over autophagy-mediated tumor growth and cardiac function are not well defined. PURPOSE: To determine the effect of exercise on tumor morphology and cardiac function. METHODS: Fisher 344 rats (n=28) were assigned to one of four groups: 1) sedentary non tumor-bearing (SED), 2) sedentary tumor-bearing (SED+T), 3) wheel run non-tumor bearing (WR), or 4) wheel running tumor bearing (WR+T)...
January 8, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29313971/in-vivo-antitumor-function-of-tumor-antigen-specific-ctls-generated-in-the-presence-of-ox40-co-stimulation-in-vitro
#4
Ngoc Pham Minh, Satoshi Murata, Naomi Kitamura, Tomoyuki Ueki, Masatsugu Kojima, Toru Miyake, Katsushi Takebayashi, Hirokazu Kodama, Eiji Mekata, Masaji Tani
Adoptive cell transfer (ACT) is an emerging and promising cancer immunotherapy that has been improved through various approaches. Here, we described the distinctive characteristics and functions of tumor Ag-specific effector CD8+ T-cells, co-cultured with a tumor specific peptide and a stimulatory anti-OX40 antibody, before being used for ACT therapy in tumor-bearing mouse recipients. Splenic T-cells were obtained from wild-type FVB/N mice that had been injected with a HER2/neu (neu)-expressing tumor and a neu-vaccine...
January 4, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29305065/high-macrophage-pd-l1-expression-not-responsible-for-t-cell-suppression
#5
Naomi Goldman, Yelizavet D Lomakova, Jennifer Londregan, Amanda Bucknum, Kelley DePierri, John Somerville, James E Riggs
Tumors are often comprised of microenvironments (TMEs) with a high proportion of cells and molecules that regulate immunity. Peritoneal cavity (PerC) cell culture reproduces key features of TMEs as lymphocyte proliferation is suppressed by PerC macrophages (Mϕs). We monitored the expression of T cell stimulatory (Class II MHC, B7) and inhibitory (PD-L1) molecules by PerC APCs before and after culture and report here that IFNγ-driven PD-L1 expression increased markedly on PerC Mϕs after TCR ligation, even more so than seen with direct APC activation by LPS...
December 30, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29301753/exosomes-associated-with-human-ovarian-tumors-harbor-a-reversible-checkpoint-of-t-cell-responses
#6
Gautam N Shenoy, Jenni L Loyall, Orla Maguire, Vandana Iyer, Raymond J Kelleher, Hans Minderman, Paul K Wallace, Kunle Odunsi, Sathy V Balu-Iyer, Richard B Bankert
Nano-sized membrane-encapsulated extracellular vesicles isolated from the ascites fluids of ovarian cancer patients are identified as exosomes based on their biophysical and compositional characteristics. We report here that T cells pulsed with these tumor-associated exosomes during TCR-dependent activation inhibit various activation endpoints including translocation of NFkB and NFAT into the nucleus, upregulation of CD69 and CD107a, production of cytokines and cell proliferation. Additionally, the activation of virus-specific CD8+ T cells that are stimulated with the cognate viral peptides presented in the context of class I MHC is also suppressed by the exosomes...
January 4, 2018: Cancer Immunology Research
https://www.readbyqxmd.com/read/29299660/reduction-of-myeloid-derived-suppressor-cells-reinforces-the-anti-solid-tumor-effect-of-recipient-leukocyte-infusion-in-murine-neuroblastoma-bearing-allogeneic-bone-marrow-chimeras
#7
Isabelle Dierckx de Casterlé, Sabine Fevery, Omer Rutgeerts, Fariba Poosti, Sofie Struyf, Caroline Lenaerts, Mark Waer, An D Billiau, Ben Sprangers
Allogeneic hematopoietic stem cell transplantation is an emerging treatment option for solid tumors because of its capacity to elicit immune graft-versus-tumor effects. However, these are often limited and associated with GvHD. Adoptive recipient leukocyte infusion (RLI) was shown to enhance anti-tumor responses of allogeneic bone marrow transplantation in murine neuroblastoma (Neuro2A)-bearing chimeras. In contrast to the clinically used donor leukocyte infusion, the RLI anti-tumor effect-elicited by host-versus-graft lymphohematopoietic reactivity-does not cause GvHD; however, the tumor growth-inhibitory effect is incomplete, because overall survival is not prolonged...
January 3, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29298343/epcam-peptide-primed-dendritic-cell-vaccination-confers-significant-anti-tumor-immunity-in-hepatocellular-carcinoma-cells
#8
Yoo Jin Choi, Seong-Joon Park, You-Soo Park, Hee Sung Park, Kwang Mo Yang, Kyu Heo
Cancer stem-like cells (CSCs) may play a key role in tumor initiation, self-renewal, differentiation, and resistance to current treatments. Dendritic cells (DCs) play a vital role in host immune reactions as well as antigen presentation. In this study, we explored the suitability of using CSC peptides as antigen sources for DC vaccination against human breast cancer and hepatocellular carcinoma (HCC) with the aim of achieving CSC targeting and enhancing anti-tumor immunity. CD44 is used as a CSC marker for breast cancer and EpCAM is used as a CSC marker for HCC...
2018: PloS One
https://www.readbyqxmd.com/read/29288540/expansion-of-human-%C3%AE-%C3%AE-t-cells-for-adoptive-immunotherapy-using-a-bisphosphonate-prodrug
#9
Yoshimasa Tanaka, Kaoru Murata-Hirai, Masashi Iwasaki, Kenji Matsumoto, Kosuke Hayashi, Asuka Kumagai, Mohanad H Nada, Hong Wang, Hirohito Kobayashi, Hiroshi Kamitakahara, Haruki Okamura, Tomoharu Sugie, Nagahiro Minato, Masakazu Toi, Craig T Morita
Cancer immunotherapy with human γδ T cells expressing Vγ2Vδ2 T cell receptor (also termed Vγ9Vδ2) has shown promise because of their ability to recognize and kill most types of tumors in an MHC-unrestricted fashion that is independent of the number of tumor mutations. In clinical trials, adoptive transfer of Vγ2Vδ2 T cells has been shown to be safe and does not require preconditioning. In this report, we describe a method for preparing highly enriched human Vγ2Vδ2 T cells using the bisphosphonate prodrug, tetrakis-pivaloyloxymethyl 2-(thiazole-2-ylamino)ethylidene-1,1-bisphosphonate (PTA)...
December 30, 2017: Cancer Science
https://www.readbyqxmd.com/read/29285934/synthetic-polymeric-mixed-micelles-target-to-lymph-node-triggering-enhanced-cellular-and-humoral-immune-responses
#10
Chenxi Li, Xiaoxu Zhang, Qing Chen, Jiulong Zhang, Wenpan Li, Haiyang Hu, Xiuli Zhao, Mingxi Qiao, Dawei Chen
It has been widely accepted that lymph nodes (LNs) are critical targets of cancer vaccines since antigen presentation and initiation of T cell-mediated immune responses occur primarily at these locations. In this study, amphiphilic diblock copolymer PEOz-PLA combined with carboxylterminalted-Pluronic F127 were used to construct mixed micelles (carboxylated-NPs) for co-delivery of antigen OVA and Toll-like receptor-7 agonist CL264 (carboxylated-NPs/OVA/CL264) to the LN resident DCs. The results showed that the small, sub-60nm size of the self-assembled mixed micelles enables them to rapidly penetrate into lymphatic vessels and reach DLNs after subcutaneous injection...
December 29, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29285385/mhc-class-ii-associated-stomach-cancer-mutations-correlate-with-lack-of-subsequent-tumor-development
#11
John M Yavorski, George Blanck
The role of tumor cell expression of major histocompatibility class II (MHCII) has been controversial, with evidence indicating that tumor cell expression of MHCII may lead to an anti-tumor immune response and to tumor cell apoptosis and that MHCII has pro-tumorigenic functions. The cancer genome atlas (TCGA) indicates numerous deleterious mutations for the highly specific, MHCII transcriptional activation proteins, RFX5, RFXAP, RFXANK and CIITA. Also, mutations in the non-polymorphic, human leukocyte antigen (HLA)-DRA gene, which encodes the heavy chain for the most prominent human MHCII molecule, HLA-DR, are common...
December 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29275860/antigen-identification-for-orphan-t-cell-receptors-expressed-on-tumor-infiltrating-lymphocytes
#12
Marvin H Gee, Arnold Han, Shane M Lofgren, John F Beausang, Juan L Mendoza, Michael E Birnbaum, Michael T Bethune, Suzanne Fischer, Xinbo Yang, Raquel Gomez-Eerland, David B Bingham, Leah V Sibener, Ricardo A Fernandes, Andrew Velasco, David Baltimore, Ton N Schumacher, Purvesh Khatri, Stephen R Quake, Mark M Davis, K Christopher Garcia
The immune system can mount T cell responses against tumors; however, the antigen specificities of tumor-infiltrating lymphocytes (TILs) are not well understood. We used yeast-display libraries of peptide-human leukocyte antigen (pHLA) to screen for antigens of "orphan" T cell receptors (TCRs) expressed on TILs from human colorectal adenocarcinoma. Four TIL-derived TCRs exhibited strong selection for peptides presented in a highly diverse pHLA-A∗02:01 library. Three of the TIL TCRs were specific for non-mutated self-antigens, two of which were present in separate patient tumors, and shared specificity for a non-mutated self-antigen derived from U2AF2...
December 20, 2017: Cell
https://www.readbyqxmd.com/read/29273394/sting-dcs-and-the-link-between-innate-and-adaptive-tumor-immunity
#13
Ralph E Vatner, Edith M Janssen
Cancer and the immune system are intimately related. Much of the bulk of tumors is comprised of stromal leukocytes with immune functions, which serve to both promote and inhibit tumor growth, invasion and metastasis. The T lymphocytes of the adaptive immune system are essential for tumor immunity, and these T cells are generated by cross-priming against tumor associated antigens. Dendritic cells (DCs) are essential in this process, serving as the cellular link between innate and adaptive immunity. As a prerequisite for priming of adaptive immune responses, DCs must take up tumor antigens, process them and present them in the context of the major histocompatibility complex (MHC)...
December 19, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29260516/-effect-of-recombinant-antigen-ferritin-on-dc-induce-immune-response
#14
Ya-Na Wang, Qiang Wang, Chan Wang, Wei Zhao
OBJECTIVE: To explore the immunoreaction against protoscolex infection by the recombinant ferritin of echinococcus granulosus (rEg.ferritin) immunized mice. METHODS: Bone marrow deriedstem cells (BMDCs) were collected and exposed in different antigens by cell culture and included 6 groups,there were hydatid fluid (HF) group (HF 30 μg/mL),rEg.ferritin group (rEg.ferritin 1 μg/mL), rEg.ferritin+LPS group (rEg.ferritin 1 μg/mL and LPS 100 ng/mL),HF+LPS group (HF 30 μg/mL and LPS 100 ng/mL),LPS group (LPS 100 ng/mL) and control (not add antigen)...
November 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29251002/mannosylated-t-tn-with-freund-s-adjuvant-induces-cellular-immunity
#15
Hye-Youn Son, Vasso Apostolopoulos, Chul-Woo Kim
Inducing cancer-specific cellular immune responses has become an attractive strategy in cancer treatment. In this study, we investigated the role of several adjuvants in eliciting T/Tn-specific cellular immunity and protection against T/Tn expressing tumor challenge. T/Tn (9:1) antigen was purified from blood type "O" erythrocytes donated from healthy Korean volunteers. Immunization was performed using: T/Tn only, T/Tn mixed with Freund's adjuvant (T/Tn + FA), keyhole limpet hemocyanin (KLH)-conjugated T/Tn mixed with FA (KLH-T/Tn + FA), and oxidized mannan-conjugated T/Tn mixed with FA (ox-M-T/Tn + FA)...
December 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/29245977/the-cancer-testis-antigen-sperm-protein-17-a-new-biomarker-and-immunological-target-in-head-and-neck-squamous-cell-carcinoma
#16
Christopher A Schutt, Leonardo Mirandola, Jose A Figueroa, Diane D Nguyen, Joehassin Cordero, Klauss Bumm, Benjamin L Judson, Maurizio Chiriva-Internati
Head and Neck Squamous Cell Carcinoma is a deadly and locally aggressive malignancy that frequently portends a poor prognosis. Since current treatment modalities including surgery, chemotherapy and radiation are heavily debilitating and often result in recurrence intense efforts have been put into the development of novel less toxic and more lasting treatment strategies. Recently, immunotherapy has been proposed as a promising alternative that could potentially meet these requirements. SP17 is a validated cancer-testis antigen in multiple myeloma, ovarian cancer and non-small cell lung cancer...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29242535/lipid-bodies-containing-oxidatively-truncated-lipids-block-antigen-cross-presentation-by-dendritic-cells-in-cancer
#17
Filippo Veglia, Vladimir A Tyurin, Dariush Mohammadyani, Maria Blasi, Elizabeth K Duperret, Laxminarasimha Donthireddy, Ayumi Hashimoto, Alexandr Kapralov, Andrew Amoscato, Roberto Angelini, Sima Patel, Kevin Alicea-Torres, David Weiner, Maureen E Murphy, Judith Klein-Seetharaman, Esteban Celis, Valerian E Kagan, Dmitry I Gabrilovich
Cross-presentation is a critical function of dendritic cells (DCs) required for induction of antitumor immune responses and success of cancer immunotherapy. It is established that tumor-associated DCs are defective in their ability to cross-present antigens. However, the mechanisms driving these defects are still unknown. We find that impaired cross-presentation in DCs is largely associated with defect in trafficking of peptide-MHC class I (pMHC) complexes to the cell surface. DCs in tumor-bearing hosts accumulate lipid bodies (LB) containing electrophilic oxidatively truncated (ox-tr) lipids...
December 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29242154/high-expression-of-diffuse-panbronchiolitis-critical-region-1-gene-promotes-cell-proliferation-migration-and-invasion-in-pancreatic-ductal-adenocarcinoma
#18
Jiayi Yan, Guanghui Chen, Xuesong Zhao, Fangying Chen, Ting Wang, Fei Miao
Diffuse panbronchiolitis critical region 1 (DPCR1) is located in the major histocompatibility complex (MHC) class I. It was reported to be downregulated in invasive pituitary adenoma compared with that in non-invasive tumors, but upregulated in the precursor of gastric carcinogenesis. However, the direct effect of DPCR1 on cancer cells has rarely been reported, and the role DPCR1 in pancreatic ductal adenocarcinoma (PDAC) remains unclear. The clinical sample validation and public data analysis of the present study demonstrated that DPCR1 was upregulated markedly in PDAC and this high expression was negatively correlated with the patient prognosis...
December 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29238041/foxo1-is-a-regulator-of-mhc-ii-expression-and-anti-tumor-effect-of-tumor-associated-macrophages
#19
Jing-Bo Yang, Zhi-Bin Zhao, Qing-Zhi Liu, Tai-Dou Hu, Jie Long, Kai Yan, Zhe-Xiong Lian
Macrophages are a critical component in host immune responses against tumor. In this work we investigated the role of forkhead box O1 (FoxO1) in the transcriptional regulation in macrophages, which affects the anti-tumor functions of tumor-associated macrophages (TAMs). First, we showed that TAMs expressed reduced levels of FoxO1, which was associated with their protumoral M2 polarization state. The suppression of FoxO1 expression in TAM was induced by the hypoxic condition in the tumor microenviroment. Next, we confirmed that FoxO1 positively regulates MHC-II genes by binding to the promoter region of Ciita gene, the master activator of multiple MHC-II genes...
December 14, 2017: Oncogene
https://www.readbyqxmd.com/read/29221214/prognostic-value-of-mica-b-in-cancers-a-systematic-review-and-meta-analysis
#20
Yijing Zhao, Naifei Chen, Yu Yu, Lili Zhou, Chao Niu, Yudi Liu, Huimin Tian, Zheng Lv, Fujun Han, Jiuwei Cui
Purpose: MHC class I chain related-proteins A (MICA) and B (MICB) are natural killer group 2D ligands that mediate tumor surveillance. Several studies have suggested that MICA/B levels predict clinical outcomes in patients with cancer; however, this remains contentious. Here, we present a systematic review and meta-analysis of available studies of the prognostic value of MICA/B in cancer. Materials and Methods: We searched PubMed, Embase, Clinicaltrials.gov, and Cochrane Library to identify studies published from inception to July 2017 that assessed MICA/B in patients with cancer...
November 10, 2017: Oncotarget
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