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https://www.readbyqxmd.com/read/29679856/b7-h6-expression-is-induced-by-lipopolysaccharide-and-facilitates-cancer-invasion-and-metastasis-in-human-gliomas
#1
Fengyuan Che, Xiaoli Xie, Long Wang, Quanping Su, Feiyu Jia, Yufu Ye, Lanlan Zang, Jing Wang, Hongyan Li, Yanchun Quan, Cuiping You, Jiawei Yin, Zhiqiang Wang, Gen Li, Yifeng Du, Lijuan Wang
Although great progress has been made in treatment regimens, gliomas are still incurable and the 5-year survival remains poor. Studies focusing on molecules that regulate tumorigenesis or tumor immunity may provide potential therapeutic strategies for patients with glioma. B7-H6 is selectively expressed in tumor cells and plays vital roles in host immune responses. In this study, we demonstrated that B7-H6 was expressed in glioma cell lines, including CRT, U251, SHG-44, SF-295, TG-905 and U373, and tumor tissues isolated from glioma patients...
April 18, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29679564/frequencies-and-expression-levels-of-programmed-death-ligand-1-pd-l1-in-circulating-tumor-rna-ctrna-in-various-cancer-types
#2
Toshiyuki Ishiba, Andreas-Claudius Hoffmann, Joshua Usher, Yahya Elshimali, Todd Sturdevant, Mai Dang, Yolanda Jaimes, Rama Tyagi, Ronald Gonzalez, Mary Grino, Jacek K Pinski, Afsaneh Barzi, Luis E Raez, Wilfried E Eberhardt, Dirk Theegarten, Heinz-Josef Lenz, Hiroyuki Uetake, Peter V Danenberg, Kathleen Danenberg
BACKGROUND: Precision medicine and prediction of therapeutic response requires monitoring potential biomarkers before and after treatment. Liquid biopsies provide noninvasive prognostic markers such as circulating tumor DNA and RNA. Circulating tumor RNA (ctRNA) in blood is also used to identify mutations in genes of interest, but additionally, provides information about relative expression levels of important genes. In this study, we analyzed PD-L1 expression in ctRNA isolated from various cancer types...
April 18, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29675465/elimination-of-established-tumors-with-nanodisc-based-combination-chemoimmunotherapy
#3
Rui Kuai, Wenmin Yuan, Sejin Son, Jutaek Nam, Yao Xu, Yuchen Fan, Anna Schwendeman, James J Moon
Although immune checkpoint blockade has shown initial success for various cancers, only a small subset of patients benefits from this therapy. Some chemotherapeutic drugs have been reported to induce antitumor T cell responses, prompting a number of clinical trials on combination chemoimmunotherapy. However, how to achieve potent immune activation with traditional chemotherapeutics in a manner that is safe, effective, and compatible with immunotherapy remains unclear. We show that high-density lipoprotein-mimicking nanodiscs loaded with doxorubicin (DOX), a widely used chemotherapeutic agent, can potentiate immune checkpoint blockade in murine tumor models...
April 2018: Science Advances
https://www.readbyqxmd.com/read/29675101/a-network-meta-analysis-comparing-the-efficacy-and-safety-of-anti-pd-1-with-anti-pd-l1-in-non-small-cell-lung-cancer
#4
Wei You, Mei Liu, Ji-Dong Miao, Yu-Qian Liao, Yi-Bing Song, Dian-Kun Cai, Yang Gao, Hao Peng
Background : This network meta-analysis aimed at comparing anti-programmed death 1 (anti-PD-1) with anti-programmed death ligand 1(anti-PD-L1) immunotherapy in patients with metastatic, previously treated non-small cell lung cancer (NSCLC) who failed first-line treatment. Methods : We searched electronic databases to identify all eligible clinical trials. End-points included overall survival (OS), progression-free survival (PFS) and objective response. Hazard ratios (HRs) or odds ratios (ORs) and corresponding 95% confidence intervals (CIs) were extracted...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29673240/the-major-role-of-nf-kb-in-the-depth-of-invasion-on-acral-melanoma-by-decreasing-cd8-t-cells
#5
Hermin Aminah Usman, Bethy S Hernowo, Maringan Diapari Lumban Tobing, Reti Hindritiani
Background: The tumor microenvironment including immune surveillance affects malignant melanoma (MM) behavior. Nuclear factor кB (NF-κB) stimulates the transcription of various genes in the nucleus and plays a role in the inflammatory process and in tumorigenesis. CD8+ T cells have cytotoxic properties important in the elimination of tumors. However, inhibitory receptors on the cell surface will bind to programmed death-ligand 1 (PD-L1), causing CD8+ T cells to lose their ability to initiate an immune response...
April 20, 2018: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/29673110/programmed-death-ligand-1-expression-in-gastric-cancer-correlation-with-mismatch-repair-deficiency-and-her2-negative-status
#6
Lei Wang, Qiongyan Zhang, Shujuan Ni, Cong Tan, Xu Cai, Dan Huang, Weiqi Sheng
Gastric cancer (GC) is one of the most common malignancies. Immunotherapy is a promising targeted treatment. The immune regulatory programmed death-1 (PD-1)/programmed death-ligand 1 (PD-L1) axis has been used as a checkpoint target for immunotherapy. Currently, considerable discrepancies exist concerning the expression status of PD-L1 and its prognostic value in GC. We aimed to evaluate the expression rates of PD-L1 in GC, and further assess its relationship with mismatch repair (MMR), and human epidermal growth factor receptor 2 (HER2) status...
April 19, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29672601/expression-of-immune-checkpoint-regulators-cytotoxic-t-lymphocyte-antigen-4-ctla-4-and-programmed-death-ligand-1-pd-l1-in-female-breast-carcinomas
#7
Ari Kassardjian, Peter I Shintaku, Neda A Moatamed
BACKGROUND: Immune checkpoint regulators, cytotoxic T lymphocyte antigen 4 (CTLA-4) and the programmed cell death protein-1/programmed death-ligand 1 (PD-1/PD-L1) have emerged as promising new targets for cancer therapeutics. While tumor expression of PD-L1 has been shown to have objective responses to anti-PD-L1 immunotherapies, the clinical implications of CTLA-4 expression in tumor cells or immune cells in the tumor microenvironment is still controversial. We investigated the expression of CTLA-4 and PD-L1 in human breast tumors and provided a scoring system for the systematic evaluation of CTLA-4 staining...
2018: PloS One
https://www.readbyqxmd.com/read/29672367/characterization-of-pd-l1-and-pd-1-expression-and-cd8-tumor-infiltrating-lymphocyte-in-epstein-barr-virus-associated-nasopharyngeal-carcinoma
#8
Noppadol Larbcharoensub, Komkrit Mahaprom, Chuleeporn Jiarpinitnun, Narumol Trachu, Nattha Tubthong, Poompis Pattaranutaporn, Ekaphop Sirachainan, Nuttapong Ngamphaiboon
OBJECTIVES: Immunotherapies that target the programmed death-1/ programmed death-1 ligand (PD-1/PD-L1) immune checkpoint pathway have shown promise in nasopharyngeal carcinoma (NPC) in early phases clinical studies. Here, we evaluated PD-1 and PD-L1 expression and CD8+ tumor-infiltrating lymphocytes (TILs) in NPC patients. MATERIALS AND METHODS: Newly diagnosed NPC patients were identified through the institutional database between January 2007 and December 2012...
April 18, 2018: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29669930/tsc2-deficient-tumors-have-evidence-of-t-cell-exhaustion-and-respond-to-anti-pd-1-anti-ctla-4-immunotherapy
#9
Heng-Jia Liu, Patrick H Lizotte, Heng Du, Maria C Speranza, Hilaire C Lam, Spencer Vaughan, Nicola Alesi, Kwok-Kin Wong, Gordon J Freeman, Arlene H Sharpe, Elizabeth P Henske
Tuberous sclerosis complex (TSC) is an incurable multisystem disease characterized by mTORC1-hyperactive tumors. TSC1/2 mutations also occur in other neoplastic disorders, including lymphangioleiomyomatosis (LAM) and bladder cancer. Whether TSC-associated tumors will respond to immunotherapy is unknown. We report here that the programmed death 1 coinhibitory receptor (PD-1) is upregulated on T cells in renal angiomyolipomas (AML) and pulmonary lymphangioleiomyomatosis (LAM). In C57BL/6J mice injected with syngeneic TSC2-deficient cells, anti-PD-1 alone decreased 105K tumor growth by 67% (P < 0...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29669784/pd-l1-b7-h1-inhibits-viral-clearance-by-macrophages-in-hsv-1-infected-corneas
#10
Sohyun Jeon, Alexander M Rowe, Kate L Carroll, Stephen A K Harvey, Robert L Hendricks
Immune privilege helps protect the cornea from damaging inflammation but can also impair pathogen clearance from this mucosal surface. Programmed death-ligand 1 (PD-L1 or B7-H1) contributes to corneal immune privilege by inhibiting the function of a variety of immune cells. We asked whether programmed death-1 (PD-1)/PD-L1 interaction regulates HSV-1 clearance from infected corneas. We show that PD-L1 is constitutively expressed in the corneal epithelium and is upregulated upon HSV-1 corneal infection, with peak expression on CD45+ cells NK cells, dendritic cells, neutrophils, and macrophages and CD45- corneal epithelial cells at 4 d postinfection (dpi)...
April 18, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29667169/expression-of-scavenger-receptor-marco-defines-a-targetable-tumor-associated-macrophage-subset-in-non-small-cell-lung-cancer
#11
Linnéa La Fleur, Vanessa F Boura, Andrey Alexeyenko, Anders Berglund, Victor Pontén, Johanna Sm Mattsson, Dijana Djureinovic, Johan Persson, Hans Brunnström, Johan Isaksson, Eva Brandén, Hirsh Koyi, Patrick Micke, Mikael Ci Karlsson, Johan Botling
Tumor-associated macrophages (TAMs) are attractive targets for immunotherapy. Recently, studies in animal models showed that treatment with an anti-TAM antibody directed against the scavenger receptor MARCO resulted in suppression of tumor growth and metastatic dissemination. Here we investigated the expression of MARCO in relation to other macrophage markers and immune pathways in a non-small cell lung cancer (NSCLC) cohort (n=352). MARCO, CD68, CD163, MSR1 and programmed death ligand-1 (PD-L1) were analyzed by immunohistochemistry and immunofluorescence, and associations to other immune cells and regulatory pathways were studied in a subset of cases (n=199) with available RNA-seq data...
April 18, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29666026/cervical-cancer-state-of-the-science-from-angiogenesis-blockade-to-checkpoint-inhibition
#12
REVIEW
Lindsey E Minion, Krishnansu S Tewari
Vascular endothelial growth factor (VEGF) has emerged as a therapeutic target in several malignancies, including cervical cancer. Chemotherapy doublets combined with the fully humanized monoclonal antibody, bevacizumab, now constitute first-line therapy for women struggling with recurrent/metastatic cervical carcinoma. Regulatory approval for this indication was based on the phase III randomized trial, GOG 240, which demonstrated a statistically significant and clinically meaningful improvement in overall survival when bevacizumab was added to chemotherapy: 17...
March 2018: Gynecologic Oncology
https://www.readbyqxmd.com/read/29665734/in-vivo-antitumor-effects-of-mk615-led-by-pd-l1-downregulation
#13
Masashi Yanaki, Masayuki Kobayashi, Atsushi Aruga, Minoru Nomura, Makoto Ozaki
BACKGROUND/AIM: MK615 extracted from Prunus mume was reported to have anti-inflammatory effects. In this article, we examined the in vivo antitumor effect of MK615 (an extract from Japanese apricot) using mouse tumor xenografts and focusing on the downregulation of PD-L1 (programmed death-ligand 1), a ligand of programmed cell death-1, a surface protein of activated T cells. MATERIALS AND METHODS: B16/BL6 melanoma cells were injected into C57BL/6 or BALB/c-nu/nu mice to establish lung metastasis...
April 1, 2018: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/29665726/dexmedetomidine-mitigates-microglia-mediated-neuroinflammation-through-up-regulation-of-programmed-cell-death-protein-1-in-a-rat-spinal-cord-injury-model
#14
Hefan He, Yingying Zhou, Yilin Zhou, Jiayuan Zhuang, Xu He, Siyuan Wang, Wenping Lin
Excessive neuroinflammation aggravates neurological damage after spinal cord injury (SCI). Controlling neuroinflammation might favor neuroregeneration and tissue repair. Dexmedetomidine is reported to inhibit post-SCI neuroinflammation in previous research. In the current study, to determine the mechanisms by which dexmedetomidine inhibits neuroinflammation, we tested the effect of dexmedetomidine hydrochloride on microglia in vitro and in a rat SCI model. We found that dexmedetomidine hydrochloride up-regulated programmed cell death protein 1 (PD-1), an immunoregulatory molecule, in activated microglia but not in resting microglia...
April 18, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29665677/a-nanoscale-metal-organic-framework-overcomes-hypoxia-for-photodynamic-therapy-primed-cancer-immunotherapy
#15
Guangxu Lan, Kaiyuan Ni, Ziwan Xu, Samuel S Veroneau, Yang Song, Wenbin Lin
Immunotherapy has become a promising cancer therapy, but only works for a subset of cancer patients. Immunogenic photodynamic therapy (PDT) can prime cancer immunotherapy to increase the response rates, but its efficacy is severely limited by tumor hypoxia. Here we report a nanoscale metal-organic framework, Fe-TBP, as a novel nanophotosensitizer to overcome tumor hypoxia and sensitize effective PDT, priming non-inflamed tumors for cancer immunotherapy. Fe-TBP was built from iron clusters and porphyrin ligands and sensitized PDT under both normoxic and hypoxic conditions...
April 18, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29664061/correlation-between-programmed-death-1-ligand-1-and-p53-in-patients-with-lung-adenocarcinoma
#16
Cheng Xu, Zhi-Hong Zhang
No abstract text is available yet for this article.
April 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29663398/transition-of-the-programmed-death-1-pathway-from-the-primary-colorectal-cancer-to-its-corresponding-pulmonary-metastasis
#17
Ei Miyamoto, Toyofumi F Chen-Yoshikawa, Chiyuki Ueshima, Akihiko Yoshizawa, Masatsugu Hamaji, Takamasa Yamamoto, Kenji Kawada, Hironori Haga, Yoshiharu Sakai, Hiroshi Date
BACKGROUND AND OBJECTIVES: The inhibition of the programmed death 1 (PD-1)/its ligand 1 (PD-L1) pathway may be associated with clinical responses in colorectal cancer (CRC). We aimed to characterize the transition of PD-1/PD-L1 expression through pulmonary metastasis (PM) and its clinical relevance. METHODS: This study retrospectively reviewed 50 patients who had curative resection of primary CRC and its PM. We evaluated the presence of PD-1+ tumor-infiltrating lymphocytes (TILs) and PD-L1+ tumor cells in both the primary tumor and its PM by immunohistochemistry...
April 17, 2018: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29662546/combination-of-immunotherapy-with-chemotherapy-and-radiotherapy-in-lung-cancer-is-this-the-beginning-of-the-end-for-cancer
#18
REVIEW
Chiara Lazzari, Niki Karachaliou, Alessandra Bulotta, Mariagrazia Viganó, Aurora Mirabile, Elena Brioschi, Mariacarmela Santarpia, Luca Gianni, Rafael Rosell, Vanesa Gregorc
Immune checkpoint inhibitors have significantly improved overall survival with an acceptable safety profile in a substantial proportion of non-small cell lung cancer (NSCLC) patients. However, not all patients are sensitive to immune checkpoint blockade and, in some cases, programmed death 1 (PD-1) or programmed death ligand 1 (PD-L1) inhibitors accelerate tumor progression. Several combination strategies are under evaluation, including the concomitant or sequential evaluation of chemotherapy or radiotherapy with immunotherapy...
2018: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/29661791/interferon-%C3%AE-and-its-important-roles-in-promoting-and-inhibiting-spontaneous-and-therapeutic-cancer-immunity
#19
Elise Alspach, Danielle M Lussier, Robert D Schreiber
Originally identified in studies of cellular resistance to viral infection, interferon (IFN)-γ is now known to represent a distinct member of the IFN family and plays critical roles not only in orchestrating both innate and adaptive immune responses against viruses, bacteria, and tumors, but also in promoting pathologic inflammatory processes. IFN-γ production is largely restricted to T lymphocytes and natural killer (NK) cells and can ultimately lead to the generation of a polarized immune response composed of T helper (Th)1 CD4+ T cells and CD8+ cytolytic T cells...
April 16, 2018: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/29661720/pd-l1-immuno-expression-assay-in-thymomas-study-of-84-cases-and-review-of-literature
#20
Prerna Guleria, Nuzhat Husain, Saumya Shukla, Sunil Kumar, Rajinder Parshad, Deepali Jain
BACKGROUND AND AIMS: Programmed death ligand 1 (PD-L1), an immune check point inhibitor, is known to be expressed in several malignancies and is being considered as a prognostic factor and a potential immunotherapeutic target. The aim of this study was to characterize PD-L1 expression in thymomas and to determine correlation with clinicopathological features and previously published studies in the literature. METHODS: Tissue microarrays were prepared from selected blocks of thymomas and immunohistochemistry (IHC) for PD-L1 was performed...
April 4, 2018: Annals of Diagnostic Pathology
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