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https://www.readbyqxmd.com/read/29743880/-trypanosoma-cruzi-exploits-wnt-signaling-pathway-to-promote-its-intracellular-replication-in-macrophages
#1
Ximena Volpini, Laura F Ambrosio, Laura Fozzatti, Constanza Insfran, Cinthia C Stempin, Laura Cervi, Claudia Cristina Motran
During the acute phase of Trypanosoma cruzi infection, macrophages can act as host cells for the parasites as well as effector cells in the early anti-parasitic immune response. Thus, the targeting of specific signaling pathways could modulate macrophages response to restrict parasite replication and instruct an appropriate adaptive response. Recently, it has become evident that Wnt signaling has immunomodulatory functions during inflammation and infection. Here, we tested the hypothesis that during T. cruzi infection, the activation of Wnt signaling pathway in macrophages plays a role in modulating the inflammatory/tolerogenic response and therefore regulating the control of parasite replication...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29731961/macrophages-induce-budding-in-aggressive-human-colon-cancer-subtypes-by-protease-mediated-disruption-of-tight-junctions
#2
Kari Trumpi, Nicola Frenkel, Timo Peters, Nicoline M Korthagen, Jennifer M J Jongen, Daniëlle Raats, Helma van Grevenstein, Yara Backes, Leon M Moons, Miangela M Lacle, Jan Koster, Danny Zwijnenburg, Inne H M Borel Rinkes, Onno Kranenburg
Primary human colorectal tumors with a high stromal content have an increased capacity to metastasize. Cancer-associated fibroblasts (CAFs) promote metastasis, but the contribution of other stromal cell types is unclear. Here we searched for additional stromal cell types that contribute to aggressive tumor cell behavior. By making use of the 'immunome compendium'-a collection of gene signatures reflecting the presence of specific immune cell-types-we show that macrophage signatures are most strongly associated with a high CAF content and with poor prognosis in multiple large cohorts of primary tumors and liver metastases...
April 13, 2018: Oncotarget
https://www.readbyqxmd.com/read/29724817/myeloid-%C3%AE-catenin-deficiency-exacerbates-atherosclerosis-in-low-density-lipoprotein-receptor-deficient-mice
#3
Fang Wang, Zun Liu, Se-Hyung Park, Taesik Gwag, Weiwei Lu, Murong Ma, Yipeng Sui, Changcheng Zhou
OBJECTIVE: The Wnt/β-catenin signaling is an ancient and evolutionarily conserved pathway that regulates essential aspects of cell differentiation, proliferation, migration and polarity. Canonical Wnt/β-catenin signaling has also been implicated in the pathogenesis of atherosclerosis. Macrophage is one of the major cell types involved in the initiation and progression of atherosclerosis, but the role of macrophage β-catenin in atherosclerosis remains elusive. This study aims to investigate the impact of β-catenin expression on macrophage functions and atherosclerosis development...
May 3, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29691294/reciprocal-network-between-cancer-stem-like-cells-and-macrophages-facilitates-the-progression-and-androgen-deprivation-therapy-resistance-of-prostate-cancer
#4
Hai Huang, Chao Wang, Fei Liu, Hui-Zhen Li, Guang Peng, Xu Gao, Ke-Qin Dong, Hong-Ru Wang, De-Pei Kong, Min Qu, Li-He Dai, Kai-Jian Wang, Zhe Zhou, Jun Yang, Ze-Yu Yang, Yan-Qiong Cheng, Qin-Qin Tian, Dan Liu, Chuan-Liang Xu, Dan-Feng Xu, Xin-Gang Cui, Ying-Hao Sun
PURPOSE: Cancer stem-like cells (CSCs) contribute to the progression and androgen deprivation therapy (ADT) resistance of prostate cancer. Since CSCs depend on their specific niche, including tumor-associated macrophages (TAMs), elucidating the network between CSCs and TAMs may help to effectively inhibit the progression and ADT resistance of prostate cancer. EXPERIMENTAL DESIGN: The underlying intracellular mechanism that sustains the stem-like characteristics of CSCs in prostate cancer was assessed via RNA-seq, co-IP, ChIP and other assays...
April 24, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29662489/immunological-approaches-towards-cancer-and-inflammation-a-cross-talk
#5
REVIEW
Xinglong Qu, Ying Tang, Shucheng Hua
The inflammation is the protective response of the body against various harmful stimuli; however, the aberrant and inappropriate activation tends to become harmful. The acute inflammatory response tends to resolved once the offending agent is subside but this acute response becomes chronic in nature when the body is unable to successfully neutralized the noxious stimuli. This chronic inflammatory microenvironment is associated with the release of various pro-inflammatory and oncogenic mediators such as nitric oxide (NO), cytokines [IL-1β, IL-2, interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α)], growth factor, and chemokines...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29605095/activated-renal-tubular-wnt-%C3%AE-catenin-signaling-triggers-renal-inflammation-during-overload-proteinuria
#6
Dickson W L Wong, Wai Han Yiu, Kam Wa Chan, Ye Li, Bin Li, Sarah W Y Lok, Makoto M Taketo, Peter Igarashi, Loretta Y Y Chan, Joseph C K Leung, Kar Neng Lai, Sydney C W Tang
Imbalance of Wnt/β-catenin signaling in renal cells is associated with renal dysfunction, yet the precise mechanism is poorly understood. Previously we observed activated Wnt/β-catenin signaling in renal tubules during proteinuric nephropathy with an unknown net effect. Therefore, to identify the definitive role of tubular Wnt/β-catenin, we generated a novel transgenic "Tubcat" mouse conditionally expressing stabilized β-catenin specifically in renal tubules following tamoxifen administration...
March 28, 2018: Kidney International
https://www.readbyqxmd.com/read/29567472/soat1-deficiency-attenuates-atherosclerosis-by-regulating-inflammation-and-cholesterol-transportation-via-ho-1-pathway
#7
Nan Wu, Rong-Qing Li, Li Li
Sterol O-acyltransferase 1 (SOAT1) is a key enzyme for cholesteryl ester biosynthesis. The objective of the present study is to investigate the role and underlying molecular mechanisms of SOAT1 in atherosclerosis. Our results indicated that SOAT1 was highly expressed in endothelial cells of atherosclerotic lesions in human patients with atherosclerosis and in apolipoprotein E deficient (ApoE-/- ) mice fed with high fat diet (HFD). We established a model of atherosclerosis using ApoE and SOAT1 gene double knockout (ApoE-/- SOAT1-/- ) mice...
March 19, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29549325/downregulation-of-lumican-accelerates-lung-cancer-cell-invasion-through-p120-catenin
#8
Cheng-Ta Yang, Jhy-Ming Li, Wing-Keung Chu, Shu-Er Chow
The overexpression of lumican has been found in lung cancer cells; however, the functional role of lumican in lung cancer cells remains unclear. In this study, we found lumican functioned as a tubulin-binding protein and the depletion of lumican by transfection with its specific shRNA increased lung cancer cell invasion. Such alterations led to morphological changes and actin cytoskeleton remodeling, including the induction of membrane ruffling or protrusion and stress fiber formation, correlated with the increased activities of Rac and Rho...
March 16, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29512829/hepatic-angiomyolipoma-mutation-analysis-and-immunohistochemical-pitfalls-in-diagnosis
#9
Zhen Yan, James P Grenert, Nancy M Joseph, Chuanli Ren, Xin Chen, Nafis Shafizadeh, Sanjay Kakar
AIMS: Hepatic angiomyolipoma (AML) often shows epithelioid morphology with inconspicuous fat. Epithelioid component can mimic hepatocellular adenoma (HCA) or carcinoma (HCC). The aims of this study were to examine the expression of commonly used markers for HCA or HCC in hepatic AML and highlight pitfalls in diagnosis. METHODS AND RESULTS: Resected hepatic AMLs (n = 16) were reviewed; reticulin stain, immunohistochemistry for glutamine synthetase (GS), β-catenin and liver fatty acid binding protein (LFABP) were performed along with Sanger sequencing of exon 3 of CTNNB1 and next-generation sequencing (NGS)...
March 7, 2018: Histopathology
https://www.readbyqxmd.com/read/29485658/the-osteoimmunomodulatory-property-of-a-barrier-collagen-membrane-and-its-manipulation-via-coating-nanometer-sized-bioactive-glass-to-improve-guided-bone-regeneration
#10
Zetao Chen, Lingling Chen, Runheng Liu, Yixiong Lin, Shoucheng Chen, Shifeier Lu, Zhengmei Lin, Zhuofan Chen, Chengtie Wu, Yin Xiao
A barrier membrane is a major component of guided bone regeneration (GBR), which is traditionally viewed as a physical barrier. Due to its "foreign body" nature, the implantation of a barrier membrane would inevitably modulate immune response and subsequently affect bone dynamics, which has long been neglected. To bridge this knowledge gap, we investigated the osteoimmunomodulatory effects of barrier collagen membranes. It is found that barrier collagen membranes elicit significant effects on modulating the osteoimmune response of macrophages, by upregulating the expression of pro-inflammatory cytokines (TNFα, IL-1β, IL-6, and IL-18) and osteogenic factors (BMP2/6, WNT10b, OSM)...
May 1, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29483868/microglia-polarization-gene-environment-interactions-and-wnt-%C3%AE-catenin-signaling-emerging-roles-of-glia-neuron-and-glia-stem-neuroprogenitor-crosstalk-for-dopaminergic-neurorestoration-in-aged-parkinsonian-brain
#11
REVIEW
Francesca L'Episcopo, Cataldo Tirolo, Maria F Serapide, Salvatore Caniglia, Nunzio Testa, Loredana Leggio, Silvia Vivarelli, Nunzio Iraci, Stefano Pluchino, Bianca Marchetti
Neuroinflammatory processes are recognized key contributory factors in Parkinson's disease (PD) physiopathology. While the causes responsible for the progressive loss of midbrain dopaminergic (mDA) neuronal cell bodies in the subtantia nigra pars compacta are poorly understood, aging, genetics, environmental toxicity, and particularly inflammation, represent prominent etiological factors in PD development. Especially, reactive astrocytes, microglial cells, and infiltrating monocyte-derived macrophages play dual beneficial/harmful effects, via a panel of pro- or anti-inflammatory cytokines, chemokines, neurotrophic and neurogenic transcription factors...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29462209/modulation-of-the-colon-cancer-cell-phenotype-by-pro-inflammatory-macrophages-a-preclinical-model-of-surgery-associated-inflammation-and-tumor-recurrence
#12
María Marcuello, Xavier Mayol, Eloísa Felipe-Fumero, Jaume Costa, Laia López-Hierro, Silvia Salvans, Sandra Alonso, Marta Pascual, Luís Grande, Miguel Pera
Peritoneal infection after colorectal cancer surgery is associated with a higher rate of tumor relapse. We have recently proposed that soluble inflammatory factors released in response to a postoperative infection enhance tumor progression features in residual tumor cells. In an effort to set up models to study the mechanisms of residual tumor cell activation during surgery-associated inflammation, we have analyzed the phenotypic response of colon cancer cell lines to the paracrine effects of THP-1 and U937 differentiated human macrophages, which release an inflammatory medium characteristic of an innate immune response...
2018: PloS One
https://www.readbyqxmd.com/read/29432728/galectin-3-is-essential-for-proper-bone-cell-differentiation-and-activity-bone-remodeling-and-biomechanical-competence-in-mice
#13
Carla Iacobini, Claudia Blasetti Fantauzzi, Rossella Bedini, Raffaella Pecci, Armando Bartolazzi, Bruno Amadio, Carlo Pesce, Giuseppe Pugliese, Stefano Menini
OBJECTIVE: Galectin-3 is constitutively expressed in bone cells and was recently shown to modulate osteogenic transdifferentiation of vascular smooth muscle cells and atherosclerotic calcification. However, the role of galectin-3 in bone physiology is largely undefined. To address this issue, we analyzed (1) the skeletal features of 1-, 3- and 6-month-old galectin-3 null (Lgals3-/- ) and wild type (WT) mice and (2) the differentiation and function of osteoblasts and osteoclasts derived from these animals...
February 9, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29427412/galectin-3-interacts-with-the-chi3l1-axis-and-contributes-to-hermansky-pudlak-syndrome-lung-disease
#14
Yang Zhou, Chuan Hua He, Daniel S Yang, Tung Nguyen, Yueming Cao, Suchitra Kamle, Chang-Min Lee, Bernadette R Gochuico, William A Gahl, Barry S Shea, Chun Geun Lee, Jack A Elias
Hermansky-Pudlak syndrome (HPS) comprises a group of inherited disorders caused by mutations that alter the function of lysosome-related organelles. Pulmonary fibrosis is the major cause of morbidity and mortality in HPS-1 and HPS-4 patients. However, the mechanisms that underlie the exaggerated injury and fibroproliferative repair responses in HPS have not been adequately defined. In particular, although Galectin-3 (Gal-3) is dysregulated in HPS, its roles in the pathogenesis of HPS have not been adequately defined...
March 15, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29378206/psrc1-overexpression-attenuates-atherosclerosis-progression-in-apoe-mice-by-modulating-cholesterol-transportation-and-inflammation
#15
Kai Guo, Lu Hu, Dan Xi, Jinzhen Zhao, Jichen Liu, Tiantian Luo, Yusheng Ma, Wenyan Lai, Zhigang Guo
AIMS: Human genome-wide association studies (GWAS) have found that proline/serine-rich coiled-coil 1 (PSRC1) encodes a protein that is associated with serum lipid levels and coronary artery disease. In addition, our previous study showed that the cholesterol efflux capacity is decreased in macrophages following a treatment silencing Psrc1, indicating that PSRC1 has anti-atherosclerotic effects. However, the role of PSRC1 in the development of atherosclerosis is unknown. This study aims to explore the effect of PSRC1 on atherosclerosis and its underlying mechanisms...
March 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29356094/beta-catenin-promotes-macrophage-mediated-acute-inflammatory-response-after-myocardial-infarction
#16
Ling Huang, Mei Xiang, Ping Ye, Wei Zhou, Manhua Chen
Regulatory mechanisms for acute inflammatory responses post myocardial infarction (MI) have yet to be fully understood. In particular, the mechanisms by which cardiac macrophages modulate MI-induced myocardial inflammation remains unclear. In this study, using a mouse MI model, we showed that β-catenin-mediated signaling was activated in cardiac macrophages post-MI, especially in Ly-6C-positive proinflammatory macrophages. Using a RAW264.7-based β-catenin reporter cell line, we confirmed the presence of active β-catenin and its downstream signaling in cardiac macrophages after MI...
January 2018: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29332923/heart-failure-as-an-aging-related-phenotype
#17
REVIEW
Hiroyuki Morita, Issei Komuro
The molecular pathophysiology of heart failure, which is one of the leading causes of mortality, is not yet fully understood. Heart failure can be regarded as a systemic syndrome of aging-related phenotypes. Wnt/β-catenin signaling and the p53 pathway, both of which are key regulators of aging, have been demonstrated to play a critical role in the pathogenesis of heart failure. Circulating C1q was identified as a novel activator of Wnt/β-catenin signaling, promoting systemic aging-related phenotypes including sarcopenia and heart failure...
January 27, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29258822/lncrna-malat1-regulates-oxldl-induced-cd36-expression-via-activating-%C3%AE-catenin
#18
Ning Huangfu, Zhenyu Xu, Wenyuan Zheng, Yong Wang, Jingsong Cheng, Xiaomin Chen
The expression of scavenger receptors in macrophages regulating lipid uptake plays an important role in foam cell formation and the subsequent atherosclerotic plaque formation. Long non-coding RNA MALAT1 is abundantly expressed in THP-1-derived macrophages, and oxidized low-density lipoprotein promotes its transcription by qRT-PCR and RNA FISH detection. Through chemical inhibitor treatments and by performing a dual luciferase reporter analysis, we found that oxLDL induces MALAT1 transcription through the NF-κB pathway...
January 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29217140/inhibition-of-canonical-wnt-signaling-pathway-by-%C3%AE-catenin-cbp-inhibitor-icg-001-ameliorates-liver-fibrosis-in-vivo-through-suppression-of-stromal-cxcl12
#19
Büsra Öztürk Akcora, Gert Storm, Ruchi Bansal
Quiescent hepatic stellate cells (HSCs), in response to liver injury, undergo characteristic morphological transformation into proliferative, contractile and ECM-producing myofibroblasts. In this study, we investigated the implication of canonical Wnt signaling pathway in HSCs and liver fibrogenesis. Canonical Wnt signaling pathway activation and inhibition using β-catenin/CBP inhibitor ICG001 was examined in-vitro in TGFβ-activated 3T3, LX2, primary human HSCs, and in-vivo in CCl4 -induced acute liver injury mouse model...
March 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29191973/blocking-the-feedback-loop-between-neuroendocrine-differentiation-and-macrophages-improves-the-therapeutic-effects-of-enzalutamide-mdv3100-on-prostate-cancer
#20
Chao Wang, Guang Peng, Hai Huang, Fei Liu, De-Pei Kong, Ke-Qin Dong, Li-He Dai, Zhe Zhou, Kai-Jian Wang, Jun Yang, Yan-Qiong Cheng, Xu Gao, Min Qu, Hong-Ru Wang, Feng Zhu, Qin-Qin Tian, Dan Liu, Li Cao, Xin-Gang Cui, Chuan-Liang Xu, Dan-Feng Xu, Ying-Hao Sun
Purpose: Androgen deprivation therapy (ADT), including enzalutamide, induces resistance in prostate cancer; ADT resistance is associated with neuroendocrine differentiation (NED) and tumor-associated macrophages (TAM). This study aimed to investigate the association between enzalutamide-induced NED and TAMs and its mechanism. Experimental Design: The association between enzalutamide-induced NED and TAMs was investigated by IHC using prostate cancer tissues, enzalutamide-resistant mouse xenografts, and a coculture system...
February 1, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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