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Tumor microenvironment

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https://www.readbyqxmd.com/read/29775390/polarization-and-distribution-of-tumor-associated-macrophages-and-cox-2-expression-in-basal-cell-carcinoma-of-the-ocular-adnexae
#1
Ute Kaiser, Karin U Loeffler, Jennifer Nadal, Frank G Holz, Martina C Herwig-Carl
PURPOSE: Basal cell carcinoma (BCC) is a locally invasive skin tumor which can be subdivided into a circumscribed nodular and an invasive fibrosing subtype. There is increasing evidence that macrophages play an important role in interacting between tumor cells and their microenvironment, thereby affecting not only the invasive potential but also the patients' prognosis. Thus, we wanted to compare these two BCC variants with regard to tumor-related inflammation, COX-2 expression, distribution and polarization of tumor-associated macrophages...
May 18, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29774998/-the-expressions-and-correlations-of-il-10-cd14-and-cd68-in-laryngal-squamous-cell-carcinoma
#2
S Zhang, H Huangfu, B Q Wang, W Gao, L N Wu, Y Li, W Y Li
Objective: The aim of this study is to investigate the distribution of IL-10, CD14 and CD68 in the tumor microenvironment of LSCC with the clinicopathologic factors. Method: We detected the expressions of IL-10, CD14 and CD68 in 46 primary LSCC tumor tissues by immunohistochemistry staining and explore the relationship between them and clinicopathologic factors. Result: We found that the expressions of IL-10, CD14 and CD68 were significantly correlated with clinical stage and T stage ( P <0.01). IL-10 and CD14 were correlated with lymph node metastasis ( P <0...
June 5, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774654/a-photoactivatable-%C3%AE-5%C3%AE-1-specific-integrin-ligand
#3
Aranzazu Del Campo, Roshna V Nair, Aleeza Farrukh
The integrin α5β1 is overexpressed in colon, breast, ovarian, lung and brain tumors and has been identified as key component in mechanosensing. In order to study how dynamic changes of α5β1 engagement affect cellular behaviour, photoactivatable derivatives of α5β1 specific ligands are presented in this article. A photoremovable protecting group (PRPG) was introduced into the ligand structure at a relevant position for integrin recognition. The presence of the chromophore temporally inhibited ligand bioactivity...
May 18, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29774312/breast-cancer-prevention-current-approaches-and-future-directions
#4
REVIEW
Edward R Sauter
The topic of breast cancer prevention is very broad. All aspects of the topic, therefore, cannot be adequately covered in a single review. The objective of this review is to discuss strategies in current use to prevent breast cancer, as well as potential approaches that could be used in the future. This review does not discuss early detection strategies for breast cancer, including breast cancer screening. The breast is the most common site among women worldwide of noncutaneous cancer. Many clinical and genetic factors have been found to increase a woman's risk of developing the disease...
April 2018: European Journal of Breast Health
https://www.readbyqxmd.com/read/29774083/engineered-microfluidic-bioreactor-for-examining-the-three-dimensional-breast-tumor-microenvironment
#5
Matthew Rogers, Tammy Sobolik, David K Schaffer, Philip C Samson, Andrew C Johnson, Philip Owens, Simona G Codreanu, Stacy D Sherrod, John A McLean, John P Wikswo, Ann Richmond
The interaction of cancer cells with the stromal cells and matrix in the tumor microenvironment plays a key role in progression to metastasis. A better understanding of the mechanisms underlying these interactions would aid in developing new therapeutic approaches to inhibit this progression. Here, we describe the fabrication of a simple microfluidic bioreactor capable of recapitulating the three-dimensional breast tumor microenvironment. Cancer cell spheroids, fibroblasts, and endothelial cells co-cultured in this device create a robust microenvironment suitable for studying in real time the migration of cancer cells along matrix structures laid down by fibroblasts within the 3D tumor microenvironment...
May 2018: Biomicrofluidics
https://www.readbyqxmd.com/read/29773902/nedd9-promotes-oncogenic-signaling-a-stem-mesenchymal-gene-signature-and-aggressive-ovarian-cancer-growth-in-mice
#6
Rashid Gabbasov, Fang Xiao, Caitlin G Howe, Laura E Bickel, Shane W O'Brien, Daniel Benrubi, Thuy-Vy Do, Yan Zhou, Emmanuelle Nicolas, Kathy Q Cai, Samuel Litwin, Sachiko Seo, Erica A Golemis, Denise C Connolly
Neural precursor cell expressed, developmentally downregulated 9 (NEDD9) supports oncogenic signaling in a number of solid and hematologic tumors. Little is known about the role of NEDD9 in ovarian carcinoma (OC), but available data suggest elevated mRNA and protein expression in advanced stage high-grade cancers. We used a transgenic MISIIR-TAg mouse OC model combined with genetic ablation of Nedd9 to investigate its action in the development and progression of OC. A Nedd9-/- genotype delayed tumor growth rate, reduced incidence of ascites, and reduced expression and activation of signaling proteins including SRC, STAT3, E-cadherin, and AURKA...
May 18, 2018: Oncogene
https://www.readbyqxmd.com/read/29773900/c5a-induces-a549-cell-proliferation-of-non-small-cell-lung-cancer-via-gdf15-gene-activation-mediated-by-gcn5-dependent-klf5-acetylation
#7
Chenhui Zhao, Yongting Li, Wen Qiu, Fengxia He, Weiming Zhang, Dan Zhao, Zhiwei Zhang, Erbao Zhang, Pei Ma, Yiqian Liu, Ling Ma, Fengming Yang, Yingwei Wang, Yongqian Shu
Non-small cell lung cancer (NSCLC) is the most common type of lung cancer, and multiple evidence has confirmed that C5a production is elevated in NSCLC microenvironment. Although NSCLC cell proliferation induced by C5a has been reported, the involved mechanism has not been elucidated. In this study, we examined the proliferation-related genes (i.e., KLF5, GCN5, and GDF15) and C5a receptor (C5aR) expression in tumor tissues as well as C5a concentration in plasma of NSCLC patients, and then determined the roles of KLF5, GCN5, and GDF15 in C5a-triggered NSCLC cell proliferation and the related mechanism both in vitro and in vivo...
May 18, 2018: Oncogene
https://www.readbyqxmd.com/read/29772843/the-role-of-trp-channels-in-the-metastatic-cascade
#8
REVIEW
Benedikt Fels, Etmar Bulk, Zoltán Pethő, Albrecht Schwab
A dysregulated cellular Ca2+ homeostasis is involved in multiple pathologies including cancer. Changes in Ca2+ signaling caused by altered fluxes through ion channels and transporters (the transportome) are involved in all steps of the metastatic cascade. Cancer cells thereby "re-program" and "misuse" the cellular transportome to regulate proliferation, apoptosis, metabolism, growth factor signaling, migration and invasion. Cancer cells use their transportome to cope with diverse environmental challenges during the metastatic cascade, like hypoxic, acidic and mechanical cues...
May 17, 2018: Pharmaceuticals
https://www.readbyqxmd.com/read/29772694/the-nf-%C3%AE%C2%BAb-activating-pathways-in-multiple-myeloma
#9
REVIEW
Payel Roy, Uday Aditya Sarkar, Soumen Basak
Multiple myeloma(MM), an incurable plasma cell cancer, represents the second most prevalent hematological malignancy. Deregulated activity of the nuclear factor kappaB (NF-κB) family of transcription factors has been implicated in the pathogenesis of multiple myeloma. Tumor microenvironment-derived cytokines and cancer-associated genetic mutations signal through the canonical as well as the non-canonical arms to activate the NF-κB system in myeloma cells. In fact, frequent engagement of both the NF-κB pathways constitutes a distinguishing characteristic of myeloma...
May 16, 2018: Biomedicines
https://www.readbyqxmd.com/read/29772686/inhibition-of-the-ccl5-ccr5-axis-against-the-progression-of-gastric-cancer
#10
REVIEW
Donatella Aldinucci, Naike Casagrande
Despite the progress made in molecular and clinical research, patients with advanced-stage gastric cancer (GC) have a bad prognosis and very low survival rates. Furthermore, it is challenging to find the complex molecular mechanisms that are involved in the development of GC, its progression, and its resistance to therapy. The interactions of chemokines, also known as chemotactic cytokines, with their receptors regulate immune and inflammatory responses. However, updated research demonstrates that cancer cells subvert the normal chemokine role, transforming them into fundamental constituents of the tumor microenvironment (TME) with tumor-promoting effects...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29772538/targeting-fibroblast-activation-protein-in-cancer-prospects-and-caveats
#11
Petr Busek, Rosana Mateu, Michal Zubal, Lenka Kotackova, Aleksi Sedo
Fibroblast activation protein (FAP, seprase) is a serine protease with post-proline dipeptidyl peptidase and endopeptidase enzymatic activity. FAP is upregulated in several tumor types, while its expression in healthy adult tissues is scarce. FAP molecule itself and FAP+ stromal cells play an important although probably context-dependent and tumor type-specific pathogenetic role in tumor progression. We provide an overview of FAP expression under both physiological and pathological conditions with focus on human malignancies...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29772358/tumor-to-lesion-metastasis-a-case-report-of-carcinoma-metastasis-to-multiple-sclerosis-lesion
#12
Jian-Qiang Lu, Suresh Menon, Crystal Fong, Boleslaw Lach, Christopher Power
BACKGROUND: The term of "tumor-to-lesion metastasis" is an extension of "tumor-to-tumor metastasis", which is a rare but well-documented phenomenon. Tumor metastasis to the meninges and/or central nervous system (CNS) is rare in patents with multiple sclerosis (MS), although MS lesions bear many similarities to the primary tumor microenvironment and the metastatic niche. We present the first case of malignant tumor metastasis to MS lesions with immunophenotyping of inflammatory cells in the metastatic foci...
May 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29772266/pten-pdz-binding-domain-suppresses-mammary-carcinogenesis-in-the-mmtv-pymt-breast-cancer-model
#13
Mingfei Yan, Yubing Wang, Chi Wai Wong, Penelope Mei-Yu Or, Kin Lok Wong, Lisha Li, Alexander M Many, Hong Guan, Ui Soon Khoo, Andrew M Chan
Phosphatase and tension homolog (PTEN) is a potent tumor suppressor that possesses a PDZ-binding domain (PDZ-BD) at the end of its carboxyl terminus, whose functions during tumorigenesis remains unclear. Here, we crossed a mouse strain with germline deletion of PTEN PDZ-BD with MMTV-PyMT breast cancer model, and found that knockout (KO) mice display normal development of mammary glands, but have both increased breast tumorigenicity and lung metastasis. Orthotopic allograft experiments suggest the loss of PTEN PDZ-BD in breast cancer cells rather than in tumor microenvironment plays a prominent role in increasing tumor burden...
May 14, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29772209/prolyl-hydroxylase-2-a-promising-target-to-inhibit-hypoxia-induced-cellular-metabolism-in-cancer-cells
#14
REVIEW
Lakhveer Singh, Sara Aldosary, Abdulaziz S Saeedan, M Nazam Ansari, Gaurav Kaithwas
Hypoxia-inducible factor-1α (HIF-1α) shifts the metabolism of glucose from highly efficient oxidative phosphorylation to less efficient glycolysis. Pyruvic acid thus accumulated is oxidized to lactic acid which is pumped out in the tumor microenvironment. Protons generated from the pentose phosphate pathway (PPP) and upon hydrolysis of ATP further enhance the acidity in the tumor microenvironment. The resultant pH in the tumor microenvironment activates an endoplasmic reticulum protein: sterol regulatory element binding protein-1c (SREBP-1c), which once activated enhances proliferation of the tumor cell...
May 14, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29771768/high-density-infiltration-of-v-domain-immunoglobulin-suppressor-of-t-cell-activation-up-regulated-immune-cells-in-human-pancreatic-cancer
#15
Jinʼe Liu, Xiaoxue Xie, Chunxiao Xuan, Tingting Li, Lanlan Wang, Lianghong Teng, Jun Liu
V-domain immunoglobulin suppressor of T-cell activation (VISTA) is constitutively expressed in hematopoietic lineage and is highly up-regulated in tumor infiltrated myeloid cells and regulatory T cells in animal models. However, its expression in human pancreatic tumor microenvironment remains unknown. In this research, we aimed at the expression of VISTA in human pancreatic cancer samples. METHODS: We performed immunohistochemistry to determine VISTA expression in human pancreatic cancer samples...
May 15, 2018: Pancreas
https://www.readbyqxmd.com/read/29771386/immunotherapy-in-cns-cancers-the-role-of-immune-cell-trafficking
#16
Nivedita M Ratnam, Mark R Gilbert, Amber J Giles
Glioblastoma (GBM) is a highly malignant CNS tumor with very poor survival despite intervention with conventional therapeutic strategies. Although the CNS is separated from the immune system by the blood-brain barrier (BBB) and the blood-cerebrospinal fluid barrier (BCSFB), emerging evidence of immune surveillance and the selective infiltration of GBMs by immune suppressive cells indicates that there is breakdown or compromise of these physical barriers. This in turn offers hope that immunotherapy can be applied to specifically target and reduce tumor burden...
May 15, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29771197/emerging-insights-into-wnt-%C3%AE-catenin-signaling-in-head-and-neck-cancer
#17
K A Alamoud, M A Kukuruzinska
Head and neck cancer presents primarily as head and neck squamous cell carcinoma (HNSCC), a debilitating malignancy fraught with high morbidity, poor survival rates, and limited treatment options. Mounting evidence indicates that the Wnt/β-catenin signaling pathway plays important roles in the pathobiology of HNSCC. Wnt/β-catenin signaling affects multiple cellular processes that endow cancer cells with the ability to maintain and expand immature stem-like phenotypes, proliferate, extend survival, and acquire aggressive characteristics by adopting mesenchymal traits...
June 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29771176/potential-use-of-cxcl12-cxcr4-and-sonic-hedgehog-pathways-as-therapeutic-targets-in-medulloblastoma
#18
Marla Karine Amarante, Glauco Akelinghton Freire Vitiello, Marcos Henrique Rosa, Igor Alves Mancilla, Maria Angelica Ehara Watanabe
Medulloblastoma (MB) is the most common malignant brain tumor occurring in children, and although high long-term survival rates have been reached with current therapeutic protocols, several neurological injuries are still observed among survivors. It has been shown that the development of MB is highly dependent on the microenvironment surrounding it and that the CXCL12 chemokine and its receptor, CXCR4 and the Sonic Hedgehog (SHH) pathway are crucial for cerebellar development, coordinating proliferation and migration of embryonic cells and malfunctions in these axes can lead to MB development...
May 17, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29770915/cytolytic-activity-score-to-assess-anticancer-immunity-in-colorectal-cancer
#19
Sumana Narayanan, Tsutomu Kawaguchi, Li Yan, Xuan Peng, Qianya Qi, Kazuaki Takabe
BACKGROUND: Elevated tumor-infiltrating lymphocytes (TILs) within the tumor microenvironment is a known positive prognostic factor in colorectal cancer (CRC). We hypothesized that since cytotoxic T cells release cytolytic proteins such as perforin (PRF1) and pro-apoptotic granzymes (GZMA) to attack cancer cells, a cytolytic activity score (CYT) would be a useful tool to assess anticancer immunity. METHODS: Genomic expression data were obtained from 456 patients from The Cancer Genome Atlas (TCGA)...
May 16, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29770822/a-size-switchable-nanoplatform-for-targeting-the-tumor-microenvironment-and-deep-tumor-penetration
#20
Xingli Cun, Man Li, Shuying Wang, Yifei Wang, Jialing Wang, Zhengze Lu, Ruixin Yang, Xian Tang, Zhirong Zhang, Qin He
The complex tumor microenvironment (TME) in solid tumors forms physiological barriers to the efficient delivery of nanomedicine, leading to limited therapeutic efficacy. Herein, to overcome these physiological barriers and improve the therapeutic effect, we constructed a novel size-adjustable nanoplatform for efficient drug delivery into solid tumors. The smart size-switchable nanoplatform (DGL/DOX@PP) was prepared by conjugating small dendrigraft poly-l-lysine (DGL) to poly(ethylene glycol)-poly(caprolactone) micelles via a matrix metalloproteinase 2 (MMP-2)-sensitive peptide...
May 17, 2018: Nanoscale
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