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https://www.readbyqxmd.com/read/28820530/cxcr7-attenuates-the-tgf-%C3%AE-induced-endothelial-to-mesenchymal-transition-and-pulmonary-fibrosis
#1
Shuhong Guan, Jun Zhou
Lung fibrosis is a progressive and often fatal lung disease characterized by fibroblast proliferation and excessive deposition of extracellular matrix in the lungs. The chemokine receptor CXCR7 has been shown to control cell adhesion, migration and proliferation by regulating the epithelial-to-mesenchymal transition (EMT), but the role of CXCR7 in regulating the endothelial-to-mesenchymal transition (EndMT) and lung fibrosis remains largely unclear. In this study, we investigated the interrelation of CXCR7 and TGF-β, a crucial player in lung fibrogenesis...
August 18, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28817386/cxcr4-blockade-with-amd3100-enhances-taxol-chemotherapy-to-limit-ovarian-cancer-cell-growth
#2
Patrick M Reeves, Mojgan A Abbaslou, Farah R W Kools, Mark C Poznansky
The standard of care for ovarian cancer includes initial treatment with chemotherapy. Despite initial efficacy, over 70% of patients develop recurrence; thus, there is a need to identify novel approaches that can improve therapeutic outcomes. We evaluated AMD3100 (Plerixafor), an FDA-approved CXCR4 inhibitor, as a potential adjunctive therapy for low-dose Taxol (Paclitaxel) by assessing the impact on in-vitro ovarian cancer cell proliferation. Proliferation was a measure for both human TOV-112D and murine ID8 ovarian cancer cells incubated with AMD3100 and Taxol, either individually or in combination...
August 16, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28811579/cxcl12-enhances-angiogenesis-through-cxcr7-activation-in-human-umbilical-vein-endothelial-cells
#3
Min Zhang, Lisha Qiu, Yanyan Zhang, Dongsheng Xu, Jialin C Zheng, Li Jiang
Angiogenesis is the process by which new vessels form from existing vascular networks. Human umbilical vein endothelial cells (HUVECs) may contribute to the study of vascular repair and angiogenesis. The chemokine CXCL12 regulates multiple cell functions, including angiogenesis, mainly through its receptor CXCR4. In contrast to CXCL12/CXCR4, few studies have described roles for CXCR7 in vascular biology, and the downstream mechanism of CXCR7 in angiogenesis remains unclear. The results of the present study showed that CXCL12 dose-dependently enhanced angiogenesis in chorioallantoic membranes (CAMs) and HUVECs...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807596/the-role-of-angiotensin-ii-in-parietal-epithelial-cell-proliferation-and-crescent-formation-in-glomerular-diseases
#4
Paola Rizzo, Rubina Novelli, Cinzia Rota, Elena Gagliardini, Barbara Ruggiero, Daniela Rottoli, Ariela Benigni, Giuseppe Remuzzi
Crescentic glomerulonephritis (GN) is a devastating disease with rapidly progressive deterioration in kidney function, which, histologically, manifests as crescent formation in most glomeruli. We previously found that crescents derive from the aberrant proliferation and migration of parietal epithelial cells (PECs)/progenitor cells, and that the angiotensin (ang) II/ang II type-1 (AT1) receptor pathway may participate, together with the stromal cell-derived factor-1 (SDF-1)/CXCR4 axis, in the development of those lesions...
August 11, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28772134/expression-of-c-x-c-motif-chemokine-receptors-4-and-7-in-salivary-gland-neoplasms
#5
Ekarat Phattarataratip, Kittipong Dhanuthai
OBJECTIVES: Chemokine receptors have been shown to overexpress in several cancer types. Binding of chemokines to their cognate chemokine receptors on tumor cells can promote tumor growth, angiogenesis and metastasis. The purposes of this study was to examine the expression of chemokine receptors, CXCR4 and CXCR7, in salivary gland neoplasms and its association with pathologic characteristics. DESIGN: Sixty-two cases of salivary gland neoplasms, including 25 mucoepidermoid carcinomas (MEC), 18 adenoid cystic carcinomas (ACC), 14 pleomorphic adenomas (PA) and 5 polymorphous low-grade adenocarcinoma (PLGA) were investigated for CXCR4 and CXCR7 expression immunohistochemically...
July 26, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28759950/chemokine-receptor-cxcr7-is-an-independent-prognostic-biomarker-in-glioblastoma
#6
Lina Deng, Wenxin Zheng, Xueshuang Dong, Jianghua Liu, Chunyu Zhu, Dan Lu, Jin Zhang, Laijun Song, Yuchao Wang, Dan Deng
BACKGROUND: Glioblastoma (GBM) is the most common and most fatal primary brain cancer in adults. Due to the complex nature of GBM, its pathogenesis still remain unclear. Accumulating evidence suggest that chemokine receptor CXCR7 contribute to the development of various types of tumors. OBJECTIVE: We aim to examine the prognostic significance of CXCR7 in GBM. METHODS: CXCR7 were first detected by Immunohistochemistry. The association between CXCR7 and overall survival (OS) were examined...
July 19, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28754798/frontline-science-cxcr7-mediates-cd14-cd16-monocyte-transmigration-across-the-blood-brain-barrier-a-potential-therapeutic-target-for-neuroaids
#7
Mike Veenstra, Dionna W Williams, Tina M Calderon, Kathryn Anastos, Susan Morgello, Joan W Berman
CD14(+)CD16(+) monocytes transmigrate into the CNS of HIV-positive people in response to chemokines elevated in the brains of infected individuals, including CXCL12. Entry of these cells leads to viral reservoirs, neuroinflammation, and neuronal damage. These may eventually lead to HIV-associated neurocognitive disorders. Although antiretroviral therapy (ART) has significantly improved the lives of HIV-infected people, the prevalence of cognitive deficits remains unchanged despite ART, still affecting >50% of infected individuals...
July 28, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28711757/cxcr4-and-cxcr7-play-distinct-roles-in-cardiac-lineage-specification-and-pharmacologic-%C3%AE-adrenergic-response
#8
Delaine K Ceholski, Irene C Turnbull, Venu Pothula, Laura Lecce, Andrew A Jarrah, Changwon Kho, Ahyoung Lee, Lahouaria Hadri, Kevin D Costa, Roger J Hajjar, Sima T Tarzami
CXCR4 and CXCR7 are prominent G protein-coupled receptors (GPCRs) for chemokine stromal cell-derived factor-1 (SDF-1/CXCL12). This study demonstrates that CXCR4 and CXCR7 induce differential effects during cardiac lineage differentiation and β-adrenergic response in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). Using lentiviral vectors to ablate CXCR4 and/or CXCR7 expression, hiPSC-CMs were tested for phenotypic and functional properties due to gene knockdown. Gene expression and flow cytometry confirmed the pluripotent and cardiomyocyte phenotype of undifferentiated and differentiated hiPSCs, respectively...
July 8, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28687617/proinflammatory-cxcl12-cxcr4-cxcr7-signaling-axis-drives-myc-induced-prostate-cancer-in-obese-mice
#9
Achinto Saha, Songyeon Ahn, Jorge Blando, Fei Su, Mikhail G Kolonin, John DiGiovanni
Obesity is a prognostic risk factor in the progression of prostate cancer (PCa), however, the molecular mechanisms involved are unclear. In this study, we provide preclinical proof of concept for the role of a pro-inflammatory CXCL12-CXCR4/CXCR7 signaling axis in an obesity-driven mouse model of HiMyc prostate cancer. Analysis of the stromal vascular fraction (SVF) from periprostatic white adipose tissue (ppWAT) from obese HiMyc mice at 6 months of age revealed a dramatic increase in mRNAs encoding various chemokines, cytokines, growth factors and angiogenesis mediators, with CXCL12 among the most significantly upregulated genes...
July 7, 2017: Cancer Research
https://www.readbyqxmd.com/read/28680761/the-splenic-marginal-zone-shapes-the-phenotype-of-leukemia-b-cells-and-facilitates-their-niche-specific-retention-and-survival
#10
Vanessa Stache, Lydia Verlaat, Marcel Gätjen, Kristina Heinig, Jörg Westermann, Armin Rehm, Uta E Höpken
Microenvironmental regulation in lymphoid tissues is essential for the development of chronic lymphocytic leukemia. We identified cellular and molecular factors provided by the splenic marginal zone (MZ), which alter the migratory and adhesive behavior of leukemic cells. We used the Cxcr5(-/-)Eµ-Tcl1 leukemia mouse model, in which tumor cells are excluded from B cell follicles and instead accumulate within the MZ. Genes involved in MZ B cell development and genes encoding for adhesion molecules were upregulated in MZ-localized Cxcr5(-/-)Eµ-Tcl1 cells...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28670693/cxcl12-and-cxcr7-are-relevant-targets-to-reverse-cell-adhesion-mediated-drug-resistance-in-multiple-myeloma
#11
Johannes M Waldschmidt, Anna Simon, Dagmar Wider, Stefan J Müller, Marie Follo, Gabriele Ihorst, Sarah Decker, Joschka Lorenz, Manik Chatterjee, Abdel K Azab, Justus Duyster, Ralph Wäsch, Monika Engelhardt
Cell adhesion-mediated drug resistance (CAM-DR) by the bone marrow (BM) is fundamental to multiple myeloma (MM) propagation and survival. Targeting BM protection to increase the efficacy of current anti-myeloma treatment has not been extensively pursued. To extend the understanding of CAM-DR, we hypothesized that the cytotoxic effects of novel anti-myeloma agents may be abrogated by the presence of BM stroma cells (BMSCs) and restored by addition of the CXCL12 antagonist NOX-A12 or the CXCR4 inhibitor plerixafor...
July 2, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28603493/role-of-atypical-chemokine-receptors-in-microglial-activation-and-polarization
#12
REVIEW
Valentina Salvi, Francesca Sozio, Silvano Sozzani, Annalisa Del Prete
Inflammatory reactions occurring in the central nervous system (CNS), known as neuroinflammation, are key components of the pathogenic mechanisms underlying several neurological diseases. The chemokine system plays a crucial role in the recruitment and activation of immune and non-immune cells in the brain, as well as in the regulation of microglia phenotype and function. Chemokines belong to a heterogeneous family of chemotactic agonists that signal through the interaction with G protein-coupled receptors (GPCRs)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28598080/-expression-of-cxcr7-in-gastric-cancer-cells-and-its-effect-on-the-migration-and-invasion-of-sgc-7901-cells
#13
Hai-Tao Shi, A-Meng Shi, Yan Wang, Lei Dong, Gang Zhao, Yong Li, Xiao-Lan Lu
OBJECTIVES: To determine the expression of chemokine (C-X-C motif) receptor 7 (CXCR7) in five gastric cancer cell lines with various degrees of differentiation, and the effect of silencing CXCR7 on the migration and invasion of SGC-7901 cells. METHODS: The expression of CXCR7 in gastric cell lines (HGC-27, MGC-803, SGC-7901, BGC-823 and MKN-28) was detected by Western bolt and RT-PCR. The SGC-7901 cells were transfected with liposome of CXCR7 siRNA to silence CXCR7 gene, and then treated with stromal-derived factor-1 (SDF-1)-the ligand of CXCR7...
September 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28596572/inhibition-of-androgen-receptor-promotes-cxc-chemokine-receptor-7-mediated-prostate-cancer-cell-survival
#14
James J Hoy, Georgios Kallifatidis, Diandra K Smith, Bal L Lokeshwar
The atypical C-X-C chemokine receptor 7 (CXCR7) has been implicated in supporting aggressive cancer phenotypes in several cancers including prostate cancer. However, the mechanisms driving overexpression of this receptor in cancer are poorly understood. This study investigates the role of androgen receptor (AR) in regulating CXCR7. Androgen deprivation or AR inhibition significantly increased CXCR7 expression in androgen-responsive prostate cancer cell lines, which was accompanied by enhanced epidermal growth factor receptor (EGFR)-mediated mitogenic signaling, promoting tumor cell survival through an androgen-independent signaling program...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28567007/involvement-of-the-cxcl12-system-in-the-stimulatory-effects-of-prenatal-exposure-to-high-fat-diet-on-hypothalamic-orexigenic-peptides-and-behavior-in-offspring
#15
Kinning Poon, Jessica R Barson, Huanzhi Shi, Guo Qing Chang, Sarah F Leibowitz
Exposure to a high fat diet (HFD) during gestation stimulates neurogenesis and expression of hypothalamic orexigenic neuropeptides that affect consummatory and emotional behaviors. With recent studies showing a HFD to increase inflammation, this report investigated the neuroinflammatory chemokine, CXCL12, and compared the effects of prenatal CXCL12 injection to those of prenatal HFD exposure, first, by testing whether the HFD affects circulating CXCL12 in the dam and the CXCL12 system in the offspring brain, and then by examining whether prenatal exposure to CXCL12 itself mimics the effects of a HFD on hypothalamic neuropeptides and emotional behaviors...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28542132/inhibition-of-sdf-1-receptors-cxcr4-and-cxcr7-attenuates-acute-pulmonary-inflammation-via-the-adenosine-a2b-receptor-on-blood-cells
#16
Franziska Magdalena Konrad, Nadine Meichssner, Annette Bury, Kristian-Christos Ngamsri, Jörg Reutershan
Acute pulmonary inflammation is characterized by migration of polymorphonuclear neutrophils into the different compartments of the lung. Recent studies showed evidence that the chemokine stromal cell-derived factor (SDF)-1 and its receptors CXCR4 and CXCR7 influence migration of immune cells and their activity was linked to adenosine concentrations. We investigated the particular role of CXCR4- and CXCR7-inhibition and the potential link to the adenosine A2B-receptor, which plays an important anti-inflammatory role in the lung...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28533662/cxcr7-cxcl12-axis-is-involved-in-lymph-node-and-liver-metastasis-of-gastric-carcinoma
#17
Qi Xin, Na Zhang, Hai-Bo Yu, Qin Zhang, Yan-Fen Cui, Chuan-Shan Zhang, Zhe Ma, Yan Yang, Wei Liu
AIM: To investigate the role of CXC chemokine receptor (CXCR)-7 and CXCL12 in lymph node and liver metastasis of gastric carcinoma. METHODS: In 160 cases of gastric cancer, the expression of CXCR7 and CXCL12 in tumor and matched tumor-adjacent non-cancer tissues, in the lymph nodes around the stomach and in the liver was detected using immunohistochemistry to analyze the relationship between CXCR7/CXCL12 expression and clinicopathological features and to determine whether CXCR7 and CXCL12 constitute a biological axis to promote lymph node and liver metastasis of gastric cancer...
May 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28514438/conversion-of-adult-endothelium-to-immunocompetent-haematopoietic-stem-cells
#18
Raphael Lis, Charles C Karrasch, Michael G Poulos, Balvir Kunar, David Redmond, Jose G Barcia Duran, Chaitanya R Badwe, William Schachterle, Michael Ginsberg, Jenny Xiang, Arash Rafii Tabrizi, Koji Shido, Zev Rosenwaks, Olivier Elemento, Nancy A Speck, Jason M Butler, Joseph M Scandura, Shahin Rafii
Developmental pathways that orchestrate the fleeting transition of endothelial cells into haematopoietic stem cells remain undefined. Here we demonstrate a tractable approach for fully reprogramming adult mouse endothelial cells to haematopoietic stem cells (rEC-HSCs) through transient expression of the transcription-factor-encoding genes Fosb, Gfi1, Runx1, and Spi1 (collectively denoted hereafter as FGRS) and vascular-niche-derived angiocrine factors. The induction phase (days 0-8) of conversion is initiated by expression of FGRS in mature endothelial cells, which results in endogenous Runx1 expression...
May 25, 2017: Nature
https://www.readbyqxmd.com/read/28487111/monomeric-cxcl12-outperforms-its-dimeric-and-wild-type-variants-in-the-promotion-of-human-endothelial-progenitor-cells-function
#19
Shuang Chang, Yaning Li, Fang Yuan, Meijie Qu, Yaying Song, Zhijun Zhang, Guo-Yuan Yang, Yongting Wang
CXCL12 overexpression improves neurobehavioral recovery during post-ischemic stroke through multiple mechanisms including promoting endothelial progenitor cells function in animal models. It has been proposed that the monomer and dimer forms possess differential chemotactic and regulatory function. The aim of present study is to explore whether a monomeric or dimeric CXCL12 plays a different role in the endothelial progenitor cells proliferation, migration, and tube-formation in vitro. In this study, we transferred monomeric, dimeric and wild type CXCL12 gene into endothelial progenitor cells via lentiviral vectors...
May 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28479381/integrated-clinicopathological-features-and-gene-microarray-analysis-of-pancreatic-neuroendocrine-tumors
#20
Huaqiang Zhou, Qinchang Chen, Wulin Tan, Zeting Qiu, Si Li, Yiyan Song, Shaowei Gao
Pancreatic neuroendocrine tumors are relatively rare pancreatic neoplasms over the world. Investigations about molecular biology of PNETs are insufficient for nowadays. We aimed to explore the expression of messenger RNA and regulatory processes underlying pancreatic neuroendocrine tumors from different views. The expression profile of GSE73338 were downloaded, including samples with pancreatic neuroendocrine tumors. First, the Limma package was utilized to distinguish the differentially expressed messenger RNA...
August 20, 2017: Gene
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