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macrophage and TAM

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https://www.readbyqxmd.com/read/28811825/ethanol-extract-of-mylabris-phalerata-inhibits-m2-polarization-induced-by-recombinant-il-4-and-il-13-in-murine-macrophages
#1
Hwan-Suck Chung, Bong-Seon Lee, Jin Yeul Ma
Mylabris phalerata (MP) is an insect used in oriental herbal treatments for tumor, tinea infections, and stroke. Recent studies have shown that tumor-associated macrophages (TAM) have detrimental roles such as tumor progression, angiogenesis, and metastasis. Although TAM has phenotypes and characteristics in common with M2-polarized macrophages, M1 macrophages have tumor suppression and immune stimulation effects. Medicines polarizing macrophages to M1 have been suggested to have anticancer effects via the modulation of the tumor microenvironment...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28804638/tumor-associated-macrophages-potential-targets-for-cancer-treatment
#2
REVIEW
Li Yang, Yi Zhang
The fact that various immune cells, including macrophages, can be found in tumor tissues has long been known. With the introduction of concept that macrophages differentiate into a classically or alternatively activated phenotype, the role of tumor-associated macrophages (TAMs) is now beginning to be elucidated. TAMs act as "protumoral macrophages", contributing to disease progression. As the relationship between TAMs and malignant tumors becomes clearer, TAMs are beginning to be seen as potential therapeutic targets in these cases...
2017: Biomarker Research
https://www.readbyqxmd.com/read/28804221/s1p-provokes-tumor-lymphangiogenesis-via-macrophage-derived-mediators-such-as-il-1%C3%AE-or-lipocalin-2
#3
REVIEW
Shahzad N Syed, Michaela Jung, Andreas Weigert, Bernhard Brüne
A pleiotropic signaling lipid, sphingosine-1-phosphate (S1P), has been implicated in various pathophysiological processes supporting tumor growth and metastasis. However, there are only a few descriptive studies suggesting a role of S1P in tumor lymphangiogenesis, which is critical for tumor growth and dissemination. Corroborating own data, the literature suggests that apoptotic tumor cell-derived S1P alters the phenotype of tumor-associated macrophages (TAMs) to gain protumor functions. However, mechanistically, the role of TAM-induced lymphangiogenesis has only been poorly described, mostly linked to the production of lymphangiogenic factors such as vascular endothelial growth factor C (VEGF-C) and VEGF-D, or transdifferentiation into lymphatic endothelial cells...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28801853/tumor-associated-macrophage-infiltration-is-highly-associated-with-pd-l1-expression-in-gastric-adenocarcinoma
#4
Kazuto Harada, Xiaochuan Dong, Jeannelyn S Estrella, Arlene M Correa, Yan Xu, Wayne L Hofstetter, Kazuki Sudo, Hisashi Onodera, Koyu Suzuki, Akihiro Suzuki, Randy L Johnson, Zhenning Wang, Shumei Song, Jaffer A Ajani
BACKGROUND: Programmed death ligand 1 (PD-L1) is a key protein upregulated by tumor cells to suppress immune responses. Tumor-associated macrophages (TAMs) play a major role in this immunosuppression, but the relationship between PD-L1 expression and TAMs remains unclear in gastric adenocarcinoma (GAC). We simultaneously examined expression of PD-L1 and TAMs in GAC. METHODS: We performed immunohistochemical staining for PD-L1, CD68 (pan-macrophage), and CD163 (M2-like macrophage) in 217 GAC samples using a tissue microarray...
August 11, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28791370/tumor-associated-macrophages-induce-the-expression-of-foxq1-to-promote-epithelial-mesenchymal-transition-and-metastasis-in-gastric-cancer-cells
#5
Jian Guo, Yan Yan, Yu Yan, Qinyue Guo, Mingxin Zhang, Jia Zhang, David Goltzman
Gastric cancer (GC) is one of the most common malignancies, and is the second leading cause of cancer-related deaths worldwide. Macrophages infiltrated in the tumor microenvironment (TME) called tumor-associated macrophages (TAMs) are key orchestrators in TME. In GC, it has been reported that infiltration of TAMs is associated with epithelial-mesenchymal transition (EMT)-related proteins in human GC tissues, but the exactly mechanism has not been clarified. In the present study, we aimed to elucidate the underlying mechanism of TAMs on GC cells...
August 3, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28790030/notch-shapes-the-innate-immunophenotype-in-breast-cancer
#6
Qiang Shen, Brenda Cohen, Weiyue Zheng, Ramtin Rahbar, Bernard Martin, Kiichi Murakami, Sara Lamorte, Patrycja Thompson, Hal Berman, Juan Carlos Zúñiga-Pflücker, Pamela S Ohashi, Michael Reedijk
Notch activation, which is associated with basal-like breast cancer (BLBC), normally directs tissue patterning, suggesting that it may shape the tumor microenvironment (TME). Here we show that Notch in tumor cells regulates the expression of two powerful pro-inflammatory cytokines, IL1β and CCL2, and the recruitment of tumor-associated macrophages (TAMs). Notch also regulates TGFβ-mediated activation of tumor cells by TAMs, closing a Notch-dependent paracrine signaling loop between these two cell types. We use a novel mouse model in which Notch can be regulated in spontaneous mammary carcinoma to confirm that IL1β and CCL2 production, and macrophage recruitment are Notch-dependent...
August 8, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28783667/tumor-location-determines-tissue-specific-recruitment-of-tumor-associated-macrophages-and-antibody-dependent-immunotherapy-response
#7
Birgit Lehmann, Markus Biburger, Christin Brückner, Andrea Ipsen-Escobedo, Sina Gordan, Christian Lehmann, David Voehringer, Thomas Winkler, Niels Schaft, Diana Dudziak, Horia Sirbu, Georg F Weber, Falk Nimmerjahn
Despite recent advances in activating immune cells to target tumors, the presence of some immune cells, such as tumor-associated macrophages (TAMs) or tumor-associated neutrophils (TANs), may promote rather than inhibit tumor growth. However, it remains unclear how antibody-dependent tumor immunotherapies, such as cytotoxic or checkpoint control antibodies, affect different TAM or TAN populations, which abundantly express activating Fcγ receptors. In this study, we show that the tissue environment determines which cellular effector pathways are responsible for antibody-dependent tumor immunotherapy...
January 6, 2017: Science Immunology
https://www.readbyqxmd.com/read/28771701/cellular-metabolism-of-tumor-associated-macrophages-functional-impact-and-consequences
#8
REVIEW
Katrin Rabold, Mihai G Netea, Gosse J Adema, Romana T Netea-Maier
Macrophages are innate immune cells that play a role not only in host defense against infections, but also in the pathophysiology of autoimmune and autoinflammatory disorders, as well as cancer. An important feature of macrophages is their high plasticity, with high ability to adapt to environmental changes by adjusting their cellular metabolism and immunological phenotype. Macrophages are one of the most abundant innate immune cells within the tumor microenvironment that have been associated with tumor growth, metastasis, angiogenesis and poor prognosis...
August 3, 2017: FEBS Letters
https://www.readbyqxmd.com/read/28769933/reprogramming-of-tumor-associated-macrophages-with-anticancer-therapies-radiotherapy-versus-chemo-and-immunotherapies
#9
REVIEW
Géraldine Genard, Stéphane Lucas, Carine Michiels
Tumor-associated macrophages (TAMs) play a central role in tumor progression, metastasis, and recurrence after treatment. Macrophage plasticity and diversity allow their classification along a M1-M2 polarization axis. Tumor-associated macrophages usually display a M2-like phenotype, associated with pro-tumoral features whereas M1 macrophages exert antitumor functions. Targeting the reprogramming of TAMs toward M1-like macrophages would thus be an efficient way to promote tumor regression. This can be achieved through therapies including chemotherapy, immunotherapy, and radiotherapy (RT)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28768810/mouse-macrophages-show-different-requirements-for-phosphatidylserine-receptor-tim4-in-efferocytosis
#10
Yuichi Yanagihashi, Katsumori Segawa, Ryota Maeda, Yo-Ichi Nabeshima, Shigekazu Nagata
Protein S (ProS) and growth arrest-specific 6 (Gas6) bind to phosphatidylserine (PtdSer) and induce efferocytosis upon binding TAM-family receptors (Tyro3, Axl, and Mer). Here, we produced mouse ProS, Gas6, and TAM-receptor extracellular region fused to IgG fragment crystallizable region in HEK293T cells. ProS and Gas6 bound Ca(2+) dependently to PtdSer (Kd 20-40 nM), Mer, and Tyro3 (Kd 15-50 nM). Gas6 bound Axl strongly (Kd < 1.0 nM), but ProS did not bind Axl. Using NIH 3T3-based cell lines expressing a single TAM receptor, we showed that TAM-mediated efferocytosis was determined by the receptor-binding ability of ProS and Gas6...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28767130/tumor-associated-microglia-macrophages-predict-poor-prognosis-in-high-grade-gliomas-and-correlate-with-an-aggressive-tumor-subtype
#11
Mia D Sørensen, Rikke H Dahlrot, Henning B Boldt, Steinbjørn Hansen, Bjarne W Kristensen
AIMS: Glioblastomas are highly aggressive and treatment-resistant. Increasing evidence suggests that tumor-associated macrophages/microglia (TAMs) facilitate tumor progression by acquiring a M2-like phenotype. Our objective was to investigate the prognostic value of TAMs in gliomas using automated quantitative double immunofluorescence. METHODS: Samples from 240 patients with primary glioma were stained with antibodies against ionized calcium-binding adaptor molecule-1 (IBA-1) and CD204 to detect TAMs and M2-like TAMs...
August 2, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28763204/kumatakenin-isolated-from-cloves-induces-cancer-cell-apoptosis-and-inhibits-the-alternative-activation-of-tumour-associated-macrophages
#12
Jeong-Hwa Woo, Ji-Hye Ahn, Dae Sik Jang, Kyung-Tae Lee, Jung-Hye Choi
The flower buds of Syzygium aromaticum (cloves) have been used as a spice and traditional herbal medicine. The biological activities of kumatakenin, a flavonoid that has recently been isolated from cloves, are poorly characterized. In the present study, we investigated the anti-cancer effects of kumatakenin in human ovarian cancer cells and tumour-associated macrophages (TAM). We found that kumatakenin exhibited significant cytotoxic activity in human ovarian cancer cell lines, SKOV3 and A2780. A propidium iodide and Annexin V-FITC staining assay revealed that kumatakenin induces apoptosis in ovarian cancer cells...
August 1, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28752708/-advances-in-nanoparticle-targeting-tumor-associated-macrophages-for-cancer-imaging-and-therapy
#13
Guo Fengliang, Tang Guping, H U Qinglian
Tumor tissues are composed of tumor cells and complicate microenvironment. Tumor associated macrophages (TAMs) as an important component in tumor microenvironment, play fundamental roles in tumor progression, metastasis and microenvironment regulation. Recently, studies have found that nanotechnology, as an emerging platform, provides unique potential for cancer imaging and therapy. With the nanotechnology, TAMs imaging presents direct evidence for cancer development, progression, and the effectiveness of cancer treatments; it also can regulate the immunosuppression of tumor microenvironment and improve therapeutic efficiency through TAMs targeted killing or phenotypic transformation...
March 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28750175/kaposi-s-sarcoma-associated-herpesvirus-infection-promotes-differentiation-and-polarization-of-monocytes-into-tumor-associated-macrophages
#14
Natarajan Bhaskaran, Santosh K Ghosh, Xiaolan Yu, Sanhai Qin, Aaron Weinberg, Pushpa Pandiyan, Fengchun Ye
Tumor associated macrophages (TAMs) promote angiogenesis, tumor invasion and metastasis, and suppression of anti-tumor immunity. These myeloid cells originate from monocytes, which differentiate into TAMs upon exposure to the local tumor microenvironment. We previously reported that Kaposi's sarcoma-associated herpes virus (KSHV) infection of endothelial cells induces the cytokine angiopoietin-2 (Ang-2) to promote migration of monocytes into tumors. Here we report that KSHV infection of endothelial cells induces additional cytokines including interleukin-6 (IL-6), interleukin-10 (IL-10), and interleukin-13 (IL-13) that drive monocytes to differentiate and polarize into TAMs...
July 27, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28748356/pd-l1-induced-by-ifn-%C3%AE-from-tumor-associated-macrophages-via-the-jak-stat3-and-pi3k-akt-signaling-pathways-promoted-progression-of-lung-cancer
#15
Xiaohui Zhang, Yuanyuan Zeng, Qiuxia Qu, Jianjie Zhu, Zeyi Liu, Weiwei Ning, Hui Zeng, Nan Zhang, Wenwen Du, Cheng Chen, Jian-An Huang
BACKGROUND: Interferon-γ (IFN-γ) is conventionally regarded as an inflammatory cytokine that has a pivotal role in anti-infection and tumor immune surveillance. It has been used clinically to treat a variety of malignancies. However, increased evidence has suggested IFN-γ can act to induce tumor progression. The role of IFN-γ in regulating antitumor immunity appears to be complex and paradoxical. The mechanism underlying the dual aspects of IFN-γ function in antitumor immunity is not clear...
July 26, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28747781/targeting-phosphorylation-of-stat3-delays-tumor-growth-in-hpv-negative-anal-squamous-cell-carcinoma-mouse-model
#16
Lin-Lin Bu, Yi-Cun Li, Guang-Tao Yu, Jian-Feng Liu, Wei-Wei Deng, Wen-Feng Zhang, Lu Zhang, Zhi-Jun Sun
Although conventional chemoradiotherapy is effective for most anal squamous cell carcinoma (ASCC) patients, HPV-negative ASCC patients respond poorly to this treatment and new therapeutic approach is required. Our group has previously established an HPV-negative ASCC mouse model and demonstrated that signal transducer and activation of transcription 3 (STAT3) is hyper-activated in the model. Here, we show that in vivo inhibition of STAT3 by S3I-201 effectively delays tumor growth in ASCC mouse model indicated by significantly smaller tumor size and burden in the treatment group compared with control group at the same point...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28739604/s1pr1-on-tumor-associated-macrophages-promotes-lymphangiogenesis-and-metastasis-via-nlrp3-il-1%C3%AE
#17
Benjamin Weichand, Rüdiger Popp, Sarah Dziumbla, Javier Mora, Elisabeth Strack, Eiman Elwakeel, Ann-Christin Frank, Klaus Scholich, Sandra Pierre, Shahzad N Syed, Catherine Olesch, Julia Ringleb, Bilge Ören, Claudia Döring, Rajkumar Savai, Michaela Jung, Andreas von Knethen, Bodo Levkau, Ingrid Fleming, Andreas Weigert, Bernhard Brüne
Metastasis is the primary cause of cancer death. The inflammatory tumor microenvironment contributes to metastasis, for instance, by recruiting blood and lymph vessels. Among tumor-infiltrating immune cells, tumor-associated macrophages (TAMs) take a center stage in promoting both tumor angiogenesis and metastatic spread. We found that genetic deletion of the S1P receptor 1 (S1pr1) alone in CD11b(hi) CD206(+) TAMs infiltrating mouse breast tumors prevents pulmonary metastasis and tumor lymphangiogenesis. Reduced lymphangiogenesis was also observed in the nonrelated methylcholanthrene-induced fibrosarcoma model...
July 24, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28730338/jagged1-promotes-aromatase-inhibitor-resistance-by-modulating-tumor-associated-macrophage-differentiation-in-breast-cancer-patients
#18
Hang Liu, Jingxuan Wang, Minghui Zhang, Qijia Xuan, Zhipeng Wang, Xin Lian, Qingyuan Zhang
PURPOSE: Endocrine resistance limits the efficacy of anti-estrogen therapies. Notch signaling is involved in modulating tumor-associated macrophage (TAM) differentiation and is upregulated in endocrine-resistant breast cancer cells. Here, we analyzed the role of Jagged1 in the regulation of TAM polarization to investigate whether the Jagged1-Notch pathway promotes the acquisition of aromatase inhibitor (AI) resistance by upregulating TAM infiltration. METHODS: The Jagged1 expression levels and M2 TAM infiltration density, in 203 tumor samples from ER-positive postmenopausal patients, who received AI treatment, were evaluated by immunohistochemical staining and the results were compared with clincopathological parameters and survival...
July 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28728794/myeloid-suppressor-cells-in-cancer-and-autoimmunity
#19
REVIEW
Antonio Sica, Marco Massarotti
A bottleneck for immunotherapy of cancer is the immunosuppressive microenvironment in which the tumor cells proliferate. Cancers harness the immune regulatory mechanism that prevents autoimmunity from evading immunosurveillance and promoting immune destruction. Regulatory T cells, myeloid suppressor cells, inhibitory cytokines and immune checkpoint receptors are the major components of the immune system acting in concert with cancer cells and causing the subversion of anti-tumor immunity. This redundant immunosuppressive network poses an impediment to efficacious immunotherapy by facilitating tumor progression...
July 17, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28725426/colony-stimulating-factor-1-receptor-csf1r-inhibitors-in-cancer-therapy
#20
REVIEW
Michael A Cannarile, Martin Weisser, Wolfgang Jacob, Anna-Maria Jegg, Carola H Ries, Dominik Rüttinger
The tumor-permissive and immunosuppressive characteristics of tumor-associated macrophages (TAM) have fueled interest in therapeutically targeting these cells. In this context, the colony-stimulating factor 1 (CSF1)/colony-stimulating factor 1 receptor (CSF1R) axis has gained the most attention, and various approaches targeting either the ligands or the receptor are currently in clinical development. Emerging data on the tolerability of CSF1/CSF1R-targeting agents suggest a favorable safety profile, making them attractive combination partners for both standard treatment modalities and immunotherapeutic agents...
2017: Journal for Immunotherapy of Cancer
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