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https://www.readbyqxmd.com/read/29218250/evaluation-of-the-role-of-downregulation-of-snf5-ini1-core-subunit-of-swi-snf-complex-in-clear-cell-renal-cell-carcinoma-development
#1
Elzbieta Sarnowska, Michal Szymanski, Nataliia Rusetska, Marcin Ligaj, Iga Jancewicz, Pawel Cwiek, Marta Skrodzka, Marcin Leszczynski, Joanna Szarkowska, Alicja Chrzan, Malgorzata Stachowiak, Jaroslaw Steciuk, Anna Maassen, Lech Galek, Tomasz Demkow, Janusz A Siedlecki, Tomasz J Sarnowski
Clear cell renal cell carcinoma (ccRCC) is characterized by stabilization of hypoxia-inducible factor (HIF1), and mutations in von Hippel-Lindau (VHL) gene. Additionally, in about 40% of ccRCC cases the mutation in PBRM1 (POLYBROMO1) gene coding for a non-core subunit of SWI/SNF chromatin remodeling complex was found suggesting potential impairment of this complex function in ccRCC. In this study we assessed the extent to which the core SWI/SNF complex subunit - INI1 (hSNF5/SMARCB1) is affected in ccRCC and whether it has any consequences on the development of this type of cancer...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29218082/functional-characterization-of-cxcr4-in-mediating-the-expression-of-protein-c-system-in-experimental-ulcerative-colitis
#2
Xuhong Lin, Huichao Wang, Yuxia Li, Jingnan Yang, Ruilin Yang, Dandan Wei, Junjie Zhang, Desheng Yang, Bin Wang, Xuequn Ren, Guanchang Cheng
The present study aimed to explore the role of CXCR4 and protein C system (PCS) in the experimental ulcerative colitis (UC). The expression of CXCR3, CCR10, and CXCR4 in dextran sulfate sodium (DSS)-induced colitis mouse model was measured by immunohistochemistry and western blot analysis. In vitro studies with microvascular endothelial cells (MVECs) were performed. The expression of endothelial protein C receptor (EPCR) and thrombomodulin (TM) were detected by RT-PCR and western blot analysis. Activities of protein C (PC), protein S (PS), activated PC (APC) were evaluated in cells pre-treated with JNK inhibitor SP600125 and c-Jun silencing...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29213290/effect-of-isolation-technique-and-location-on-the-phenotype-of-human-corneal-stroma-derived-cells
#3
Richárd Nagymihály, Zoltán Veréb, Andrea Facskó, Morten C Moe, Goran Petrovski
Purpose: To determine the effect of the isolation technique and location upon the phenotype of human corneal stroma-derived cells (CSCs). Methods: CSCs were isolated from the corneal stroma center and periphery using the explant or enzymatic digestion technique. The native tissue was stained for functional markers, while cultured cells were analysed by FACS. PCR was used to determine gene expression in the cultured versus native cells. Results: The native stroma was positive for α-actinin, ALDH1A1, CD31, CD34, Collagen I, and Vimentin...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29212254/distinct-mobilization-of-leukocytes-and-hematopoietic-stem-cells-by-cxcr4-peptide-antagonist-ly2510924-and-monoclonal-antibody-ly2624587
#4
Sheng-Bin Peng, Robert D Van Horn, Tinggui Yin, Robin M Brown, William C Roell, Victor H Obungu, Charles Ruegg, Victor J Wroblewski, Eyas Raddad, John R Stille
Stromal cell-derived factor-1 (SDF-1) and its receptor CXCR4 play a critical role in mobilization and redistribution of immune cells and hematopoietic stem cells (HSCs). We evaluated effects of two CXCR4-targeting agents, peptide antagonist LY2510924 and monoclonal antibody LY2624587, on mobilizing HSCs and white blood cells (WBCs) in humans, monkeys, and mice. Biochemical analysis showed LY2510924 peptide blocked SDF-1/CXCR4 binding in all three species; LY2624587 antibody blocked binding in human and monkey, with minimal activity in mouse...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29211600/understanding-the-bone-marrow-microenvironment-in-hematologic-malignancies-a-focus-on-chemokine-integrin-and-extracellular-vesicle-signaling
#5
Edward Allan Racela Sison, Peter Kurre, Yong-Mi Kim
Signaling between leukemia cells and nonhematopoietic cells in the bone marrow microenvironment contributes to leukemia cell growth and survival. This complicated extrinsic mechanism of chemotherapy resistance relies on a number of pathways and factors, some of which have yet to be determined. Research on cell-cell crosstalk the bone marrow microenvironment in acute leukemia was presented at the 2016 annual Therapeutic Advances in Childhood Leukemia (TACL) investigator meeting. This review summarizes the mini-symposium proceedings and focuses on chemokine signaling via the cell surface receptor CXCR4, adhesion molecule signaling via integrin α4, and crosstalk between leukemia cells and the bone marrow microenvironment that is mediated through extracellular vesicles...
December 6, 2017: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/29208671/cxcr4-is-a-potential-target-for-diagnostic-pet-ct-imaging-in-barrett-s-dysplasia-and-esophageal-adenocarcinoma
#6
Hsin-Yu Fang, Natasha Stephens Münch, Margret Schottelius, Jonas Ingermann, Haibo Liu, Michael Schauer, Stefan Stangl, Gabriele Multhoff, Katja Steiger, Carlos Gerngroß, Moritz Jesinghaus, Wilko Weichert, Anja A Kühl, Antonia R Sepulveda, Hans-Jürgen Wester, Timothy C Wang, Michael Quante
INTRODUCTION: Barrett's Esophagus (BE) represents an early stage in carcinogenesis leading to esophageal adenocarcinoma (EAC). Considerable evidence supports a major role for chronic inflammation and diverse chemokine pathways in the development of BE and EAC. METHODS: Here we utilized a IL-1b transgenic mouse model of BE and EAC and human patient imaging to analyse the importance of CXCR4 expressing cells during esophageal carcinogenesis. RESULTS: IL-1b overexpression induces chronic esophageal inflammation and recapitulates the progression to BE and EAC...
December 5, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29207050/in-vitro-cell-behaviors-of-bone-mesenchymal-stem-cells-derived-from-normal-and-postmenopausal-osteoporotic-rats
#7
Qian Liu, Xiaoxia Zhang, Yang Jiao, Xin Liu, Yirong Wang, Song-Lun Li, Wei Zhang, Fa-Ming Chen, Yin Ding, Chuan Jiang, Zuolin Jin
Postmenopausal osteoporosis (PMO) increases bone fragility and the risk of fractures, and impairs the healing procedure of bone defects in aged women. The stromal cell‑derived factor-1α (SDF-1α)/CXC chemokine receptor type 4 (CXCR4) axis helps to maintain the biological and physiological functions of bone marrow mesenchymal stem cells (BMSCs) and increase the homing efficiency of BMSCs. The present study aimed to provide insights into the possible association between migration and osteogenic ability and the SDF-1α/CXCR4 axis in BMSCs derived from a rat model of PMO...
November 22, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29207021/stromal-cell%C3%A2-derived-factor%C3%A2-1-induces-matrix-metalloproteinase-expression-in-human-endplate-chondrocytes-cartilage-endplate-degradation-in-explant-culture-and-the-amelioration-of-nucleus-pulposus-degeneration-in-vivo
#8
Hua Zhang, Ting Zhu, Li Zhang, Qionghua Wu
Intervertebral disc (IVD) degeneration is a strong etiological factor in chronic lower back pain. Stem cell migration toward the site of IVD degeneration for regeneration is restricted by avascularity and distance. Our previous study indicated that the expression of stromal cell‑derived factor‑1 (SDF‑1) and its receptor, C-X-C chemokine receptor type 4 (CXCR4) was upregulated in degenerated cartilage endplate (CEP) and nucleus pulposus (NP). In the present study, SDF‑1 increased CXCR4 mRNA and protein expression in human endplate chondrocytes in a dose‑dependent manner...
November 22, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29204944/comparison-of-culture-media-indicates-a-role-for-autologous-serum-in-enhancing-phenotypic-preservation-of-rabbit-limbal-stem-cells-in-explant-culture
#9
Mehmet Gürdal, Özlem Barut Selver, Kemal Baysal, İsmet Durak
In this study, we aimed to compare the effects of six different cell culture media and autologous serum (AS) on the phenotypic characteristics of rabbit limbal epithelial stem cells (LESC) cultivated on porous polyethylene terephthalate (PET) membranes. Limbal explants from rabbit corneas were grown on PET membrane inserts in five different media: DMEM-F12 with fetal bovine serum (FBS) (DMEM-F12-FBS), with pluripotin (DMEM-F12-pluripotin) and with autologous serum (DMEM-F12-AS), Epilife, Keratinocyte Serum Free Medium (KSFM) and Defined-Keratinocyte Serum Free Medium...
December 4, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29203889/single-molecule-imaging-reveals-dimerization-oligomerization-of-cxcr4-on-plasma-membrane-closely-related-to-its-function
#10
Baosheng Ge, Jun Lao, Jiqiang Li, Yao Chen, Yanzhuo Song, Fang Huang
Dimerization and oligomerization of G-protein coupled receptors (GPCRs) have emerged as important characters during their trans-membrane signal transduction. However, until now the relationship between GPCR dimerization and their trans-membrane signal transduction function is still uncovered. Here, using pertussis toxin (PTX) to decouple the receptor from G protein complex and with single-molecule imaging, we show that in the presence of agonist, cells treated with PTX showed a decrease in the number of dimers and oligomers on the cell surface compared with untreated ones, which suggests that oligomeric status of CXCR4 could be significantly influenced by the decoupling of G protein complex during its signal transduction process...
December 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29203538/high-mobility-group-box-1-orchestrates-tissue-regeneration-via-cxcr4
#11
Mario Tirone, Ngoc Lan Tran, Chiara Ceriotti, Andrea Gorzanelli, Monica Canepari, Roberto Bottinelli, Angela Raucci, Stefania Di Maggio, César Santiago, Mario Mellado, Marielle Saclier, Stéphanie François, Giorgia Careccia, Mingzhu He, Francesco De Marchis, Valentina Conti, Sabrina Ben Larbi, Sylvain Cuvellier, Maura Casalgrandi, Alessandro Preti, Bénédicte Chazaud, Yousef Al-Abed, Graziella Messina, Giovanni Sitia, Silvia Brunelli, Marco Emilio Bianchi, Emilie Vénéreau
Inflammation and tissue regeneration follow tissue damage, but little is known about how these processes are coordinated. High Mobility Group Box 1 (HMGB1) is a nuclear protein that, when released on injury, triggers inflammation. We previously showed that HMGB1 with reduced cysteines is a chemoattractant, whereas a disulfide bond makes it a proinflammatory cytokine. Here we report that fully reduced HMGB1 orchestrates muscle and liver regeneration via CXCR4, whereas disulfide HMGB1 and its receptors TLR4/MD-2 and RAGE (receptor for advanced glycation end products) are not involved...
December 4, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29202279/cancer-specific-inhibitory-effects-of-genetically-engineered-stem-cells-expressing-cytosine-deaminase-and-interferon-%C3%AE-against-choriocarcinoma-in-xenografted-metastatic-mouse-models
#12
Gyu-Sik Kim, Jae-Rim Heo, Seung U Kim, Kyung-Chul Choi
Cancer treatments using stem cells expressing therapeutic genes have been identified for various types of cancers. In this study, we investigated inhibitory effects of HB1.F3.CD and HB1.F3.CD.IFN-β cells expressing Escherichia coli cytosine deaminase (CD) and human interferon-β (IFN-β) genes in intravenously (i.v.) injected mice with a metastasis model. In this treatment, pro-drug 5-fluorocytosine (5-FC) is converted to cytotoxic drug 5-fluorouracil by hNSCs expressing the CD gene, which inhibits DNA synthesis in cancer cells...
December 1, 2017: Translational Oncology
https://www.readbyqxmd.com/read/29197526/pathway-analysis-of-differentially-expressed-genes-in-mycobacterium-bovis-challenged-bovine-macrophages
#13
Sanjeev Kumar Shukla, Shubhra Shukla, Anuj Chauhan, Sarvjeet, Rehan Khan, Anuj Ahuja, Lakshya Veer Singh, Nitin M Kamble, Anupam Dhasmana, Naveen Sharma, Bipin Chand, Ajay Vir Singh, Manjit Panigrahi
The immune signalling genes during challenge of bovine macrophages with bacterial products derived from disease causing bacteria in cattle were investigated. An in-vitro cell culture model were challenged to Mycobacterium bovis of bovine monocyte derived macrophages. Macrophages from healthy and already infected animals can both be fully activated during M. bovis infection. Analysis of mRNA abundance in peripheral blood mononuclear cells from M. bovis infected and non-infected cattle were performed as a controls...
November 29, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29187403/photodynamic-priming-mitigates-chemotherapeutic-selection-pressures-and-improves-drug-delivery
#14
Huang-Chiao Huang, Imran Rizvi, Joyce Liu, Sriram Anbil, Ashish Kalra, Helen Lee, Yan Baglo, Nancy Paz, Douglas Hayden, Stephen P Pereira, Brian W Pogue, Jonathan B Fitzgerald, Tayyaba Hasan
Physiological barriers to drug delivery and selection for drug resistance limit survival outcomes in cancer patients. In this study, we present preclinical evidence that a subtumoricidal photodynamic priming (PDP) strategy can relieve drug delivery barriers in the tumor microenvironment to safely widen the therapeutic window of a nanoformulated cytotoxic drug. In orthotopic xenograft models of pancreatic cancer, combining PDP with nanoliposomal irinotecan (nal-IRI) prevented tumor relapse, reduce metastasis and increase both progression-free survival and 1-year disease-free survival...
November 29, 2017: Cancer Research
https://www.readbyqxmd.com/read/29183039/mir-146a-aggravates-lps-induced-inflammatory-injury-by-targeting-cxcr4-in-the-articular-chondrocytes
#15
Taitao Sun, Xianjun Li, Hua Song, Fei Gao, Guannan Zhou, Xiaoyan Li, Zhentong Chen, Lei Chen
BACKGROUND/AIMS: Osteoarthritis (OA) as a degenerative disease is a major problem in ageing populations. To better understand the molecular mechanisms in the pathogenesis of OA, this study explored the role of microRNA (miR)-146a in the articular chondrocytes. METHODS: The articular chondrocyte line ATDC5 was used to simulate inflammatory injury by LPS administration in vitro. Cell viability, apoptosis, mRNA expressions and productions of inflammatory factors were assessed, respectively...
November 29, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29177911/mechanisms-of-sustained-neutrophilia-in-patient-whim-09-cured-of-whim-syndrome-by-chromothripsis
#16
Qian Liu, Zhanzhuo Li, Alexander Y Yang, Ji-Liang Gao, Daniel S Velez, Elena J Cho, David H McDermott, Philip M Murphy
WHIM-09 is the first patient described with WHIM syndrome, an autosomal dominant form of neutropenia related to bone marrow retention of neutrophils. Originally diagnosed incorrectly with autoimmune neutropenia, the patient underwent splenectomy at age 9, but the absolute neutrophil count (ANC) did not rise. Subsequently, she was spontaneously cured by chromothripsis (chromosome shattering), which deleted the disease allele CXCR4 R334X , and 163 other genes, on chromosome 2 in a single hematopoietic stem cell (HSC)...
November 24, 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/29173176/the-siv-envelope-glycoprotein-viral-tropism-and-pathogenesis-novel-insights-from-nonhuman-primate-models-of-aids
#17
Adrienne E Swanstrom, Gregory Q Del Prete, Claire Deleage, Samra E Elser, Andrew A Lackner, James A Hoxie
BACKGROUND: Cellular tropism of human immunodeficiency virus (HIV-1) is closely linked to interactions between the viral envelope glycoprotein (Env) with CD4 and chemokine receptor family members, CCR5 and CXCR4. This interaction plays a key role in determining anatomic sites that are infected in vivo and the cascade of early and late events that result in chronic immune activation, immunosuppression and ultimately, AIDS. CD4+ T cells are critical to adaptive immune responses, and their early and rapid infection in gut lamina propria and secondary lymphoid tissues in susceptible hosts likely contributes to viral persistence and progression to disease...
November 24, 2017: Current HIV Research
https://www.readbyqxmd.com/read/29171984/microrna-1246-inhibits-cell-invasion-and-epithelial-mesenchymal-transition-process-by-targeting-cxcr4-in-lung-cancer-cells
#18
Xiaohui Xu, Lei Cao, Ye Zhang, Hongjian Lian, Zhiwei Sun, Yushang Cui
BACKGROUND: Recent studies have indicated that microRNAs (miRNAs) are closely related to lung cancer. However, the effects of miR-1246 on lung cancer are still elusive. In this study, we aimed to explore the molecular mechanisms of miR-1246 in lung cancer. MATERIALS AND METHODS: Using RT-qPCR assay, we analyzed the expression of miR-1246 in lung cancer cell lines and lung epithelial cell line. Using Cell Counting Kit-8 (CCK-8), flow cytometry, Transwell, RT-qPCR and western blot assays, we investigated cell viability, apoptosis, invasion and epithelial mesenchymal transition (EMT) process...
October 27, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29167123/lower-resting-and-exercise-induced-circulating-angiogenic-progenitors-and-angiogenic-t-cells-in-older-men
#19
Mark Daniel Ross, Eva M Malone, Richard Simpson, Islay Cranston, Lesley Ingram, Graham P Wright, George Chambers, Geraint D Florida-James
Ageing is associated with a dysfunctional endothelial phenotype, as well as reduced angiogenic capabilities. Exercise exerts beneficial effects on the cardiovascular system, possibly by increasing/maintaining the number and/or function of circulating angiogenic cells (CACs) that are known to decline with age. However, the relationship between cardiorespiratory fitness (CRF) and age related changes in frequency of CACs, as well as the exercise-induced responsiveness of CACs in older individuals has not yet been determined...
November 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29163802/evaluation-of-somatostatin-cxcr4-chemokine-and-endothelin-a-receptor-expression-in-a-large-set-of-paragangliomas
#20
Daniel Kaemmerer, Jörg Sänger, Ruza Arsenic, Jan G D'Haese, Jens Neumann, Annette Schmitt-Graeff, Ralph Markus Wirtz, Stefan Schulz, Amelie Lupp
Paragangliomas are predominantly benign tumors, but in some cases invasive growth and also metastasis are observed. Given the limited number of nonsurgical treatment options, novel target structures for diagnostics and therapy of this tumor entity are urgently needed. In the present study, expression of all five somatostatin receptor (SST) subtypes, chemokine receptor CXCR4 and endothelin receptor type A (ETA) was assessed by means of immunohistochemistry in a total of 66 paraffin-embedded paraganglioma samples from 55 patients...
October 27, 2017: Oncotarget
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