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https://www.readbyqxmd.com/read/28807982/c-ebp%C3%AE-is-required-for-survival-of-ly6c-monocytes
#1
Akihiro Tamura, Hideyo Hirai, Asumi Yokota, Naoka Kamio, Atsushi Sato, Tsukimi Shoji, Takahiro Kashiwagi, Yusuke Torikoshi, Yasuo Miura, Daniel G Tenen, Taira Maekawa
The transcription factor CCAAT/enhancer-binding protein β (C/EBPβ) is highly expressed in monocytes/macrophages. However, its roles in monopoiesis are largely unknown. Here, we investigated the roles of C/EBPβ in monopoiesis. Further subdivision of monocytes revealed that Cebpb mRNA was highly upregulated in Ly6C(-) monocytes in bone marrow. Accordingly, Ly6C(-) monocytes were significantly reduced in Cebpb(-/-) mice. Bone marrow chimera experiments and Mx1-Cre-mediated deletion of Cebpb revealed the cell-intrinsic and monocyte-specific requirement for C/EBPβ in monopoiesis...
August 14, 2017: Blood
https://www.readbyqxmd.com/read/28760770/transcriptional-mechanisms-that-control-expression-of-the-macrophage-colony-stimulating-factor-receptor-locus
#2
REVIEW
Rocio Rojo, Clare Pridans, David Langlais, David A Hume
The proliferation, differentiation, and survival of cells of the macrophage lineage depends upon signals from the macrophage colony-stimulating factor (CSF) receptor (CSF1R). CSF1R is expressed by embryonic macrophages and induced early in adult hematopoiesis, upon commitment of multipotent progenitors to the myeloid lineage. Transcriptional activation of CSF1R requires interaction between members of the E26 transformation-specific family of transcription factors (Ets) (notably PU.1), C/EBP, RUNX, AP-1/ATF, interferon regulatory factor (IRF), STAT, KLF, REL, FUS/TLS (fused in sarcoma/ranslocated in liposarcoma) families, and conserved regulatory elements within the mouse and human CSF1R locus...
August 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28751473/identification-of-the-macrophage-specific-promoter-signature-in-fantom5-mouse-embryo-developmental-time-course-data
#3
Kim M Summers, David A Hume
The FANTOM5 consortium used cap analysis of gene expression (CAGE) to analyze the time course of gene expression over development from 11 days postcoitum (dpc) to adult in 16 developing organs and the whole body of the mouse. Every tissue in the body contains a large number of resident macrophages that initially infiltrate the embryo from the yolk sac. These cells contribute to organogenesis, and their functions diversify during development as they acquire tissue-specific adaptations. In each of the FANTOM5 time courses, the expression of known macrophage-specific genes, including CSF1 receptor (Csf1r), epidermal growth factor-like module-containing mucin-like hormone receptor-like 1 (Emr1), and mer receptor tyrosine kinase (Mertk), was readily detectable and increased with time...
July 27, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28745620/identification-of-erythromyeloid-progenitors-and-their-progeny-in-the-mouse-embryo-by-flow-cytometry
#4
Lorea Iturri, Javier Saenz Coronilla, Yvan Lallemand, Elisa Gomez Perdiguero
Macrophages are professional phagocytes from the innate arm of the immune system. In steady-state, sessile macrophages are found in adult tissues where they act as front line sentinels of infection and tissue damage. While other immune cells are continuously renewed from hematopoietic stem and progenitor cells (HSPC) located in the bone marrow, a lineage of macrophages, known as resident macrophages, have been shown to be self-maintained in tissues without input from bone marrow HSPCs. This lineage is exemplified by microglia in the brain, Kupffer cells in the liver and Langerhans cells in the epidermis among others...
July 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28725426/colony-stimulating-factor-1-receptor-csf1r-inhibitors-in-cancer-therapy
#5
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
https://www.readbyqxmd.com/read/28724665/the-c-1085a-g-genetic-variant-of-csf1r-gene-regulates-tumor-immunity-by-altering-the-proliferation-polarization-and-function-of-macrophages
#6
Yu-Min Yeh, Shan-Ju Hsu, Peng-Chan Lin, Keng-Fu Hsu, Pei-Ying Wu, Wu-Chou Su, Jang-Yang Chang, Meng-Ru Shen
Purpose: <p>Targeting tumor-associated macrophages with CSF-1R inhibition reveals a strategy for cancer therapy. Here, we studied the impact of CSF1R germline genetic variant on CSF-1R signaling and the susceptibility to CSF-1R inhibitors.</p> <p>Experimental designs: </p> <p>CSF1R germline genetic variants were studied in 140 cancer patients. CSF-1R phosphorylation, endocytosis and macrophage polarization were measured as the response to CSF-1 stimulation. Tumor-associated macrophages in surgical specimens and sensitivity to CSF-1R inhibitors were used to determine macrophage function...
July 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28723667/resistance-to-ctla-4-checkpoint-inhibition-reversed-through-selective-elimination-of-granulocytic-myeloid-cells
#7
Paul E Clavijo, Ellen C Moore, Jianhong Chen, Ruth J Davis, Jay Friedman, Young Kim, Carter Van Waes, Zhong Chen, Clint T Allen
PURPOSE: Local immunosuppression remains a critical problem that limits clinically meaningful response to checkpoint inhibition in patients with head and neck cancer. Here, we assessed the impact of MDSC elimination on responses to CTLA-4 checkpoint inhibition. EXPERIMENTAL DESIGN: Murine syngeneic carcinoma immune infiltrates were characterized by flow cytometry. Granulocytic MDSCs (gMDSCs) were depleted and T-lymphocyte antigen-specific responses were measured...
June 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28716061/colony-stimulating-factor-1-receptor-csf1r-inhibitors-in-cancer-therapy
#8
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...
July 18, 2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28683285/il-6-stat3-dependent-induction-of-a-distinct-obesity-associated-nk-cell-subpopulation-deteriorates-energy-and-glucose-homeostasis
#9
Sebastian Theurich, Eva Tsaousidou, Ruth Hanssen, Adelheid M Lempradl, Jan Mauer, Katharina Timper, Katharina Schilbach, Kat Folz-Donahue, Christian Heilinger, Veronika Sexl, John Andrew Pospisilik, F Thomas Wunderlich, Jens C Brüning
Natural killer (NK) cells contribute to the development of obesity-associated insulin resistance. We demonstrate that in mice obesity promotes expansion of a distinct, interleukin-6 receptor (IL6R)a-expressing NK subpopulation, which also expresses a number of other myeloid lineage genes such as the colony-stimulating factor 1 receptor (Csf1r). Selective ablation of this Csf1r-expressing NK cell population prevents obesity and insulin resistance. Moreover, conditional inactivation of IL6Ra or Stat3 in NK cells limits obesity-associated formation of these myeloid signature NK cells, protecting from obesity, insulin resistance, and obesity-associated inflammation...
July 5, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28675510/the-co-regulatory-networks-of-tumor-suppressor-genes-oncogenes-and-mirnas-in-colorectal-cancer
#10
Martha L Slattery, Jennifer S Herrick, Lila E Mullany, Wade S Samowitz, John R Sevens, Lori Sakoda, Roger K Wolff
Tumor suppressor genes (TSGs) and oncogenes (OG) are involved in carcinogenesis. MiRNAs also contribute to cellular pathways leading to cancer. We use data from 217 colorectal cancer (CRC) cases to evaluate differences in TSGs and OGs expression between paired CRC and normal mucosa and evaluate how TSGs and OGs are associated with miRNAs. Gene expression data from RNA-Seq and miRNA expression data from Agilent Human miRNA Microarray V19.0 were used. We focus on genes most strongly associated with CRC (fold change (FC) of ≥1...
July 4, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28655795/first-in-human-study-of-amg%C3%A2-820-a-monoclonal-anti-colony-stimulating-factor-1-receptor-antibody-in-patients-with-advanced-solid-tumors
#11
Kyriakos P Papadopoulos, Larry Gluck, Lainie P Martin, Anthony J Olszanski, Anthony W Tolcher, Gataree Ngarmchamnanrith, Erik Rasmussen, Benny Amore, Dirk Nagorsen, John S Hill, Joe Stephenson
Binding of colony-stimulating factor 1 (CSF1) ligand to the CSF1 receptor (CSF1R) regulates survival of tumor-associated macrophages, which generally promote an immunosuppressive tumor microenvironment. AMG 820 is an investigational, fully human CSF1R antibody that inhibits binding of the ligands CSF1 and interleukin-34 and subsequent ligand-mediated receptor activation. This first-in-human phase I study evaluated the safety, pharmacokinetics, pharmacodynamics, and antitumor activity of AMG 820.<br /><br />Experimental Design: Adult patients with relapsed or refractory advanced solid tumors received intravenous AMG 820 0...
June 27, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28626216/therapeutic-effects-of-csf1r-blocking-antibodies-in-multiple-myeloma
#12
Q Wang, Y Lu, R Li, Y Jiang, Y Zheng, J Qian, E Bi, C Zhang, J Hou, S Wang, Q Yi
Our previous studies showed that macrophages (MФs), especially myeloma-associated MФs (MAMs) induce chemoresistance in human myeloma. Here we explored the potential of targeting MФs, by using colony-stimulating factor 1 receptor (CSF1R)-blocking mAbs, to treat myeloma. Our results showed that CSF1R blockade specifically inhibited the differentiation, proliferation and survival of murine M2 MФs and MAMs, and repolarized MAMs towards M1-like MФs in vitro. CSF1R blockade alone inhibited myeloma growth in vivo, by partially depleting MAMs, polarizing MAMs to the M1 phenotype, and inducing a tumor-specific cytotoxic CD4(+) T cell response...
June 19, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28570130/an-integrative-computational-approach-to-evaluate-genetic-markers-for-chronic-lymphocytic-leukemia
#13
Yu Zheng, Xiaoyang Li, Lydia C Manor, Hongbao Cao, Qiusheng Chen
Recent studies reported hundreds of genes linked to chronic lymphocytic leukemia (CLL). However, many of these candidate genes were lack of replication and results were not always consistent. Here, we proposed a computational workflow to curate and evaluate CLL-related genes. The method integrates large-scale literature knowledge data, gene expression data, and related pathways/network information for quantitative marker evaluation. Pathway Enrichment, Sub-Network Enrichment, and Gene-Gene Interaction analysis were conducted to study the pathogenic profile of the candidate genes, with four metrics proposed and validated for each gene...
June 1, 2017: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/28566469/visceral-adipose-tissue-activated-macrophage-content-and-inflammatory-adipokine-secretion-is-higher-in-pre-eclampsia-than-in-healthy-pregnancy
#14
Shahzya Huda, FIona Jordan, JAck Bray, Gillian Love, Reba Payne, Naveed Sattar, Dilys J Freeman
Obesity increases preeclampsia risk. Adipose tissue inflammation may contribute to the clinical syndrome of pre-eclampsia. We compared adipose tissue macrophage infiltration and release of pro-inflammatory adipokines in pre-eclampsia and healthy pregnancy. Subcutaneous and visceral adipose tissue biopsies were collected from healthy (n=13) and preeclampsia (n=13) mothers. Basal and lipopolysaccharide stimulated adipocyte TNFα, IL-6, CCL-2 and CRP release was measured. Adipose tissue cell densities of activated (cfms(+)) and total (CD68(+)) macrophages were determined...
May 31, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28539419/microglia-are-irrelevant-for-neuronal-degeneration-and-axon-regeneration-after-acute-injury
#15
Alexander M Hilla, Heike Diekmann, Dietmar Fischer
The role of microglia in degenerative and regenerative processes after damage of the nervous system remains ambiguous, partially due to the paucity of appropriate investigative methods. Here, we show that treatment with the pharmacological colony stimulating factor 1 receptor inhibitor PLX5622 specifically eliminated microglia in murine retinae and optic nerves with high efficiency. Interestingly, time course and extent of retinal ganglion cell (RGC) degeneration after optic nerve crush remained unaffected upon microglia depletion, although remnants of prelabeled apoptotic RGCs were not cleared from the retina in these animals...
June 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28449811/effects-of-polymorphisms-identified-in-genome-wide-association-studies-of-never-smoking-females-on-the-prognosis-of-non-small-cell-lung-cancer
#16
Seung Soo Yoo, Hyo-Gyoung Kang, Jin Eun Choi, Sook Kyung Do, Won Kee Lee, Sun Ha Choi, So Yeon Lee, Shin Yup Lee, Jaehee Lee, Seung Ick Cha, Chang Ho Kim, Yangki Seok, Eungbae Lee, Moon Soo Kim, Jong Mog Lee, Hyun-Ju Cho, In-Jae Oh, Young-Chul Kim, Sukki Cho, Sanghoon Jheon, Chi Young Jung, Mi-Hyun Kim, Min Ki Lee, Jae Yong Park
A number of genome-wide association studies have reported several variants that influence the risk of lung cancer in never-smoking females. We evaluated the impact of these variants on survival outcome in never-smoking females with non-small cell lung cancer (NSCLC). In total, 510 never-smoking females with NSCLC who underwent curative surgery were enrolled. Eleven variants associated with lung cancer susceptibility in never-smoking females were genotyped and their associations with survival outcome were analyzed...
April 2017: Cancer Genetics
https://www.readbyqxmd.com/read/28427424/microglial-depletion-alters-the-brain-neuroimmune-response-to-acute-binge-ethanol-withdrawal
#17
T Jordan Walter, Fulton T Crews
BACKGROUND: Recent studies have implicated microglia-the resident immune cells of the brain-in the pathophysiology of alcoholism. Indeed, post-mortem alcoholic brains show increased microglial markers and increased immune gene expression; however, the effects of ethanol on microglial functioning and how this impacts the brain remain unclear. In this present study, we investigate the effects of acute binge ethanol on microglia and how microglial depletion changes the brain neuroimmune response to acute binge ethanol withdrawal...
April 20, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28408464/targetable-kinase-gene-fusions-in-high-risk-b-all-a-study-from-the-children-s-oncology-group
#18
Shalini C Reshmi, Richard C Harvey, Kathryn G Roberts, Eileen Stonerock, Amy Smith, Heather Jenkins, I-Ming Chen, Marc Valentine, Yu Liu, Yongjin Li, Ying Shao, John Easton, Debbie Payne-Turner, Zhaohui Gu, Thai Hoa Tran, Jonathan V Nguyen, Meenakshi Devidas, Yunfeng Dai, Nyla A Heerema, Andrew J Carroll, Elizabeth A Raetz, Michael J Borowitz, Brent L Wood, Anne L Angiolillo, Michael J Burke, Wanda L Salzer, Patrick A Zweidler-McKay, Karen R Rabin, William L Carroll, Jinghui Zhang, Mignon L Loh, Charles G Mullighan, Cheryl L Willman, Julie M Gastier-Foster, Stephen P Hunger
Philadelphia chromosome-like (Ph-like) acute lymphoblastic leukemia (ALL) is a high-risk subtype characterized by genomic alterations that activate cytokine receptor and kinase signaling. We examined the frequency and spectrum of targetable genetic lesions in a retrospective cohort of 1389 consecutively diagnosed patients with childhood B-lineage ALL with high-risk clinical features and/or elevated minimal residual disease at the end of remission induction therapy. The Ph-like gene expression profile was identified in 341 of 1389 patients, 57 of whom were excluded from additional analyses because of the presence of BCR-ABL1 (n = 46) or ETV6-RUNX1 (n = 11)...
June 22, 2017: Blood
https://www.readbyqxmd.com/read/28405620/microglia-mediate-postoperative-hippocampal-inflammation-and-cognitive-decline-in-mice
#19
Xiaomei Feng, Martin Valdearcos, Yosuke Uchida, David Lutrin, Mervyn Maze, Suneil K Koliwad
Surgery can induce cognitive decline, a risk that increases with advancing age. In rodents, postoperative cognitive decline (POCD) is associated with the inflammatory activation of hippocampal microglia. To examine the role of microglia in POCD, we inhibited the colony-stimulating factor 1 receptor (CSF1R) in adult mice, effectively depleting CNS microglia. Surgical trauma (tibial fracture) reduced the ability of mice to remember a conditioned response learned preoperatively, a deficit more pronounced and persistent in mice with diet-induced obesity (DIO)...
April 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28383543/autozygosity-reveals-recessive-mutations-and-novel-mechanisms-in-dominant-genes-implications-in-variant-interpretation
#20
Dorota Monies, Sateesh Maddirevula, Wesam Kurdi, Mohammed H Alanazy, Hisham Alkhalidi, Mohammed Al-Owain, Raashda A Sulaiman, Eissa Faqeih, Ewa Goljan, Niema Ibrahim, Firdous Abdulwahab, Mais Hashem, Mohamed Abouelhoda, Ranad Shaheen, Stefan T Arold, Fowzan S Alkuraya
PURPOSE: The purpose of this study is to describe recessive alleles in strictly dominant genes. Identifying recessive mutations in genes for which only dominant disease or risk alleles have been reported can expand our understanding of the medical relevance of these genes both phenotypically and mechanistically. The Saudi population is enriched for autozygosity, which enhances the homozygous occurrence of alleles, including pathogenic alleles in genes that have been associated only with a dominant inheritance pattern...
April 6, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
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