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macrophage and TAM

Guodong Huang, Limei Yin, Jie Lan, Ruizhan Tong, Mengqian Li, Feifei Na, Xianming Mo, Chong Chen, Jianxin Xue, You Lu
May 23, 2018: Cancer Science
Honglin Li, Nan Huang, Weikang Zhu, Jianchun Wu, Xiaohui Yang, Wenjing Teng, Jianhui Tian, Zhihong Fang, Yingbin Luo, Min Chen, Yan Li
BACKGROUND: Tumor-associated macrophages (TAMs) play a critical role in modulating the tumor microenvironment and promote tumor metastases. Our studies have demonstrated that ginsenoside Rh2 (G-Rh2), a monomeric compound extracted from ginseng, is a promising anti-tumor agent in lung cancer cells. However, it remains unclear whetherG-Rh2 can modulate the differentiation of TAMs and its interaction with tumor microenvironment. In this study, we investigated how G-Rh2 regulates the phenotype of macrophages and affects the migration of non-small cell lung cancer (NSCLC) cells...
May 22, 2018: BMC Cancer
Runze Yang, Susobhan Sarkar, V Wee Yong, Jeff F Dunn
There is a complex interaction between cancer and the immune system. Tumor-associated macrophages (TAMs) can be subverted by the cancer to adopt a pro-tumor phenotype to aid tumor growth. These anti-inflammatory, pro-tumor TAMs have been shown to contribute to a worsened outcome in several different types of cancer. Various strategies aimed at combating the pro-tumor TAMs have been developed. Several therapies, such as oncolytic viral therapy and high-intensity focused ultrasound, have been shown to stimulate TAMs and suppress tumor growth...
2018: Magnetic Resonance Insights
Xiaoxue Gong, Peng Cao, Liping Liu, Yan Lin, Qing Yang, Linyu Zhou, Tianen Wu, Mansheng Luo
Oxidative stress is considered one of the major mechanisms underlying lipopolysaccharide (LPS)-induced acute liver failure (ALF). Tamoxifen has been reported to ameliorate LPS-induced ALF via the induction of monocyte to macrophage differentiation-associated 2 (Mmd-2). Whether antioxidant effects are involved remains unknown. Mice were given tamoxifen (TAM) once a day for 3 days. Twelve hours later, d-galactosamine (GaIN) and LPS were injected intraperitoneally to induce ALF. N-Acetylcysteine (NAC) was administered immediately after ALF induction as a positive control...
May 18, 2018: Immunological Investigations
Lingli Long, Mingzhu Yin, Wang Min
Ovarian cancer is fairly unique in that ovarian carcinoma cells can detach and spread directly through peritoneal cavity. It has been unclear, however, how detached cancer cells survive in the peritoneum and form spheroid structure. We have recently reported that there is a strong correlation between Tumor-associated macrophages (TAMs)-associated spheroid and clinical pathology of ovarian cancer, and that TAMs promote spheroid formation and tumor growth at early stages of transcoelomic metastasis in orthotopic mouse models...
April 20, 2018: Bio-protocol
Adrienn Volak, Stanley G LeRoy, Jeya Shree Natasan, David J Park, Pike See Cheah, Andreas Maus, Zachary Fitzpatrick, Eloise Hudry, Kelsey Pinkham, Sheetal Gandhi, Bradley T Hyman, Dakai Mu, Dwijit GuhaSarkar, Anat O Stemmer-Rachamimov, Miguel Sena-Esteves, Christian E Badr, Casey A Maguire
The malignant primary brain tumor, glioblastoma (GBM) is generally incurable. New approaches are desperately needed. Adeno-associated virus (AAV) vector-mediated delivery of anti-tumor transgenes is a promising strategy, however direct injection leads to focal transgene spread in tumor and rapid tumor division dilutes out the extra-chromosomal AAV genome, limiting duration of transgene expression. Intravenous (IV) injection gives widespread distribution of AAV in normal brain, however poor transgene expression in tumor, and high expression in non-target cells which may lead to ineffective therapy and high toxicity, respectively...
May 16, 2018: Journal of Neuro-oncology
Maryam Aghighi, Ashok Joseph Theruvath, Anuj Pareek, Laura Pisani, Raphael Alford, Anne Monika Muehe, Tarsheen K Sethi, Samantha J Holdsworth, Florette K Hazard, Dita Gratzinger, Sandra Luna-Fineman, Ranjana H Advani, Sheri L Spunt, Heike E Daldrup-Link
PURPOSE: Tumor associated macrophages (TAM) in malignant tumors have been linked to tumor aggressiveness and represent a new target for cancer immunotherapy. As new TAM-targeted immunotherapies are entering clinical trials, it is important to detect and quantify TAM with non-invasive imaging techniques. The purpose of this study was to determine if ferumoxytol-enhanced MRI can detect TAM in lymphomas and bone sarcomas of pediatric patients and young adults. EXPERIMENTAL DESIGN: In a first-in-patient , IRB-approved prospective clinical trial, 25 pediatric and young adult patients with lymphoma or bone sarcoma underwent ferumoxytol-enhanced MRI...
May 15, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Amber E de Groot, Kenneth J Pienta
The progression of cancer is a result of not only the growth of the malignant cells but also the behavior of other components of the tumor microenvironment (TME). Tumor-associated macrophages (TAMs) are key components of the TME that influence tumor growth and disease progression. TAMs can either inhibit or support tumor growth depending on their polarization to classically-activated macrophages (M1s) or alternatively-activated macrophages (M2s), respectively. Epigenetic regulation plays a significant role in determining this polarization and manipulating the epigenetic regulation in macrophages would provide a means for selectively targeting M2s thereby eliminating tumor-supporting TAMs while sparing tumor-inhibiting M1 TAMs...
April 17, 2018: Oncotarget
María José Godoy-Calderón, Víctor Salazar, Eglys González-Marcano, Ana Federica Convit
Autologous cancer cell vaccines represent a multivalent patient-specific treatment. Studies have demonstrated that these immunotherapies should be combined with immunomodulators to improve results. We tested in breast cancer the antitumor effects of a 200 µg autologous tumor cells homogenate combined with 0.0625 mg of bacillus Calmette-Guérin (BCG), and 0.02% formalin. We used a 4T1 murine model of BALB/c receiving four weekly injections of either this vaccine or control treatments. The control treatments were either Phosphate Buffer Saline, BCG treated with formalin, or the tumor cells homogenate plus BCG alone...
April 17, 2018: Oncotarget
Xiaoyue Duan, Kun He, Jing Li, Man Cheng, Hongjiao Song, Jinqiu Liu, Ping Liu
Cancer cells exhibit an increasing iron demand associated with the tumor progression. But the mechanism of iron accumulation in the tumor microenvironment is still unclear. Tumor associated macrophages (TAMs) in the tumor microenvironment may act as extra iron source. However, evidence is still lacking in TAMs as iron donors. In the present study, we found that iron concentration was significantly increased at tumor metastatic stage, which could be attributed to up-regulated expression of lipocalin2 (Lcn2)...
2018: International Journal of Physiology, Pathophysiology and Pharmacology
Wei Yusen, Wang Xia, Yang Shengjun, Zhou Shaohui, Zhang Hongzhen
PURPOSE: The purpose of this investigation was to determine the expression and significance of tumor associated macrophages (TAMs) and CXCR4 in non-small cell lung cancer (NSCLC). METHODS: Immunohistochemical staining was used to analyze the expression of CD68 (TAM surface marker) and CXCR4 in 68 cases of NSCLC and 17 cases of normal lung tissue. RESULTS AND CONCLUSION: The positive rate of CD68 was 66.2% (45/68) and CXCR4 was 61.8% (42/68) in the lung cancer tissues, while the rates in normal tissues were statistically significantly lower at 27...
March 2018: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
Lina Prasmickaite, Ellen M Tenstad, Solveig Pettersen, Shakila Jabeen, Eivind Valen Egeland, Silje Nord, Abhilash Pandya, Mads Haugland Haugen, Vessela N Kristensen, Anne-Lise Børresen-Dale, Olav Engebråten, Gunhild M Maelandsmo
The tumor microenvironment (TME) may influence both cancer progression and therapeutic response. In breast cancer (BC), particularly in the aggressive triple-negative/basal-like subgroup, patient outcome is strongly associated with the tumor's inflammatory profile. Tumor-associated macrophages (TAMs) are among the most abundant immune cells in the TME, shown to be linked to poor prognosis and therapeutic resistance. In this study we investigated the effect of the metastasis- and inflammation-associated microenvironmental factor S100A4 on breast cancer cells (BCCs) of different subtypes, and explored their further interactions with myeloid cells...
May 9, 2018: Molecular Oncology
Chanhee Lee, Joongyub Lee, Seung Ah Choi, Seung-Ki Kim, Kyu-Chang Wang, Sung-Hye Park, Se Hoon Kim, Ji Yeoun Lee, Ji Hoon Phi
BACKGROUND: Recent progress in molecular analysis has advanced the understanding of medulloblastoma (MB) and is anticipated to facilitate management of the disease. MB is composed of 4 molecular subgroups: WNT, SHH, Group 3, and Group 4. Macrophages play a crucial role in the tumor microenvironment; however, the functional role of their activated phenotype (M1/M2) remains controversial. Herein, we investigate the correlation between tumor-associated macrophage (TAM) recruitment within the MB subgroups and prognosis...
May 8, 2018: BMC Cancer
Pengfei Zhao, Yonghui Wang, Xuejia Kang, Aihua Wu, Weimin Yin, Yisi Tang, Jinyu Wang, Meng Zhang, Yifei Duan, Yongzhuo Huang
Tumor-associated macrophages (TAMs) are the major components in the tumor microenvironment (TME). The polarization from the protumor M2 (TAM2) to antitumor M1 (TAM1) phenotype can not only lift the immunosuppressive constraints and elicit cytotoxic T-cell immunity but also augment the chemotherapy efficacy. However, the treatment feasibility by TAM modulation in brain tumors and the mechanisms remained unknown. A dual-targeting biomimetic codelivery and treatment strategy was developed for anti-glioma activity...
March 14, 2018: Chemical Science
Koji Minami, Kiyokazu Hiwatashi, Shinichi Ueno, Masahiko Sakoda, Satoshi Iino, Hiroshi Okumura, Motoyuki Hashiguchi, Yota Kawasaki, Hiroshi Kurahara, Yuko Mataki, Kosei Maemura, Hiroyuki Shinchi, Shoji Natsugoe
Cluster of differentiation (CD)68 may be used as a pan-macrophage or M1 marker, whereas CD163 may be used as an M2 marker. Furthermore, folate receptor (FR)β exhibits an M2-like functional profile. In the present study, CD68 and CD163 were used to evaluate and classify tumor-associated macrophages (TAMs). The expression of CD68, CD163 and FRβ by TAMs in hepatocellular carcinoma (HCC) Tissues was investigated. Samples from 105 patients with HCC were evaluated using immunohistochemistry. The results revealed that CD68 and CD163 overexpression was associated with a worse prognosis...
May 2018: Experimental and Therapeutic Medicine
Zhangting Yao, Jieqiong Zhang, Bo Zhang, Guikai Liang, Xi Chen, Fengqi Yao, Xiaqing Xu, Honghai Wu, Qiaojun He, Ling Ding, Bo Yang
Although M2-like tumor-associated macrophages (TAMs) have been considered as a vital therapeutic target in cancer therapy due to their role in promoting tumor progression and metastasis, very few compounds have been identified to inhibit M2-like polarization of TAMs. Here, we showed that Imatinib significantly prevented macrophage M2-like polarization induced by IL-13 or IL-4 in vitro, as illustrated by reduced expression of cell surface marker CD206 and M2-like genes, including Arg1, Mgl2, Mrc1, CDH1, and CCL2...
May 3, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
Nikolai Litviakov, Matvey Tsyganov, Irina Larionova, Marina Ibragimova, Irina Deryusheva, Polina Kazantseva, Elena Slonimskaya, Irina Frolova, Eugeniy Choinzonov, Nadezhda Cherdyntseva, Julia Kzhyshkowska
PURPOSE: High activity of enzyme TOP2a in tumor cells is known to be associated with sensitivity to anthracycline chemotherapy, but 20% of such patients do not show clinical response. Tumor microenvironment, including tumor-associated macrophages (TAM), is an essential factor defining the efficiency of chemotherapy. In the present study, we analyzed the expression of M2 macrophage markers, YKL-39 and CCL18, in tumors of breast cancer patients received anthracycline-based NAC. METHODS: Patients were divided into two groups according to the level of doxorubicin sensitivity marker TOP2a: DOX-Sense and DOX-Res groups...
May 4, 2018: Cancer Chemotherapy and Pharmacology
Ji-Chang Wang, Xin Sun, Qiang Ma, Gui-Feng Fu, Long-Long Cong, Hong Zhang, De-Fu Fan, Jun Feng, Shao-Ying Lu, Jian-Lin Liu, Guang-Yue Li, Pei-Jun Liu
Beneficial effects of metformin on cancer risk and mortality have been proved by epidemiological and clinical studies, thus attracting research interest in elucidating the underlying mechanisms. Recently, tumour-associated macrophages (TAMs) appeared to be implicated in metformin-induced antitumour activities. However, how metformin inhibits TAMs-induced tumour progression remains ill-defined. Here, we report that metformin-induced antitumour and anti-angiogenic activities were not or only partially contributed by its direct inhibition of functions of tumour and endothelial cells...
May 4, 2018: Journal of Cellular and Molecular Medicine
Zhili Xu, Ling Wang, Jianhua Tian, Hongwei Man, Pengfei Li, Baoen Shan
The objective of the present study was to investigate the association of B7-H3 expression and cluster of differentiation (CD)163+ tumor-associated macrophage (TAM) infiltration with clinicopathological parameters in urothelial cell carcinoma of the bladder (UCB), and to investigate their potential conjoint effects on progression of UCB. B7-H3 expression and CD163+ TAM infiltration in tumor specimens from 134 consecutive patients that underwent radical cystectomy for UCB were tested using immunohistochemistry, followed by statistical analysis...
May 2018: Oncology Letters
Neha N Parayath, Avani Parikh, Mansoor M Amiji
Tumor-associated macrophages (TAMs) acquire a pro-tumor (M2) phenotype, which promotes tumor growth, angiogenesis, and metastasis. Certain microRNAs (miRs), such as miR-125b, can reprogram TAMs into an anti-tumor/pro-inflammatory (M1) phenotype. Using CD44 targeting hyaluronic acid-poly(ethyleneimine) (HA-PEI)-based nanoparticles encapsulating miR-125b, we have herein shown macrophage-specific delivery and transfection upon intraperitoneal (i.p.) administration. We have exploited the inherent ability of peritoneal macrophages to migrate towards the inflammation/injury and demonstrated that following intraperitoneal administration of HA-PEI nanoparticles, there is an accumulation of HA-PEI nanoparticles in the macrophage-ablated lung tissues of both naïve and KRAS/p53 double mutant genetically engineered (KP-GEM) non-small cell lung cancer (NSCLC) mouse model...
May 3, 2018: Nano Letters
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