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https://www.readbyqxmd.com/read/28429795/cd200-positive-cancer-associated-fibroblasts-augment-the-sensitivity-of-epidermal-growth-factor-receptor-mutation-positive-lung-adenocarcinomas-to-egfr-tyrosine-kinase-inhibitors
#1
Masayuki Ishibashi, Shinya Neri, Hiroko Hashimoto, Tomoyuki Miyashita, Tatsuya Yoshida, Yuka Nakamura, Hibiki Udagawa, Keisuke Kirita, Shingo Matsumoto, Shigeki Umemura, Kiyotaka Yoh, Seiji Niho, Masahiro Tsuboi, Kenkichi Masutomi, Koichi Goto, Atsushi Ochiai, Genichiro Ishii
Cancer associated fibroblasts (CAFs) play important roles in the chemotherapeutic process, especially through influencing the resistance of tumor cells to molecular targeted therapy. Here we report the existence of a special subpopulation of patient-specific-CAFs that augment the sensitivity of EGFR gene mutation-positive lung cancer to the EGFR-tyrosine kinase inhibitor (EGFR-TKI), gefitinib. When cocultured with EGFR mutation positive lung cancer cells, these CAFs increased the apoptic effect of gefitinib on cancer cells, whereas, in the absence of gefitinib, they did not affect cancer cell viability...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422443/role-of-cd200-in-differential-diagnosis-of-mature-b-cell-neoplasm
#2
K Rahman, P Kumar, R Gupta, M K Singh, S Nityanand
INTRODUCTION: CD 200 is a type I immunoglobulin super family membrane glycoprotein, which is expressed in various mature B-cell neoplasm (MBN). This study aimed at analyzing the expression pattern of CD200 by flow cytometry immunophenotyping (FCI) and to evaluate its utility in narrowing down the differential diagnosis of MBN, particularly in low-grade lymphomas. METHODS: A total of 160 samples were evaluated by FCI over a period of 2 years (July 2014-June 2016), by a panel of antibodies including CD200...
April 19, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28414034/age-exacerbates-surgery-induced-cognitive-impairment-and-neuroinflammation-in-sprague-dawley-rats-the-role-of-il-4
#3
Zhe Li, Fang Liu, Hong Ma, Paul F White, Roya Yumul, Yanhua Jiang, Na Wang, Xuezhao Cao
Age is the most prominent risk factor for the development of postoperative cognitive dysfunction. This study investigated the potential role of anti-inflammatory interleukin (IL)-4 in age-related differences of surgery-induced cognitive deficits and neuroinflammatory responses. Both adult and aged Sprague-Dawley male rats were subjected to partial hepatectomy or partial hepatectomy with a cisterna magna infusion of IL-4. On postoperative days 1, 3, and 7, the rats were subjected to a reversed Morris water maze test...
April 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28407515/high-cd200-expression-is-associated-with-poor-prognosis-in-cytogenetically-normal-acute-myeloid-leukemia-even-in-flt3-itd-npm1-patients
#4
Mario Tiribelli, Donatella Raspadori, Antonella Geromin, Margherita Cavallin, Santina Sirianni, Erica Simeone, Monica Bocchia, Renato Fanin, Daniela Damiani
Overexpression of CD200, a trans-membrane protein belonging to the immunoglobulin superfamily, has been associated with poor prognosis in patients with acute myeloid leukemia (AML). As few data are available in the subset of cytogenetically-normal (CN) AML, we retrospectively evaluated the correlations between CD200 expression and response to therapy in a series of 139 adults with CN-AML. CD200 was expressed in 67/139 (48%) cases; 18 of them (28%) expressed CD200 at high intensity. No differences in CD200 expression rate were observed according to age, WBC count, type of leukemia, FLT3 or NMP1 mutation, and CD56 expression...
April 4, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28390825/changes-in-cd200-and-intercellular-adhesion-molecule-1-icam-1-levels-in-brains-of-lewy-body-disorder-cases-are-associated-with-amounts-of-alzheimer-s-pathology-not-%C3%AE-synuclein-pathology
#5
Douglas G Walker, Lih-Fen Lue, Tiffany M Tang, Charles H Adler, John N Caviness, Marwan N Sabbagh, Geidy E Serrano, Lucia I Sue, Thomas G Beach
Enhanced inflammation has been associated with Alzheimer's disease (AD) and diseases with Lewy body (LB) pathology, such as Parkinson's disease (PD) and dementia with Lewy bodies (DLB). One issue is whether amyloid and tangle pathology, features of AD, or α-synuclein LB pathology have similar or different effects on brain inflammation. An aim of this study was to examine if certain features of inflammation changed in brains with increasing LB pathology. To assess this, we measured levels of the anti-inflammatory protein CD200 and the pro-inflammatory protein intercellular adhesion molecule-1 (ICAM-1) in cingulate and temporal cortex from a total of 143 cases classified according to the Unified Staging System for LB disorders...
June 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28383780/immunoglobulin-superfamily-members-encoded-by-viruses-and-their-multiple-roles-in-immune-evasion
#6
REVIEW
Domènec Farré, Pablo Martínez-Vicente, Pablo Engel, Ana Angulo
Pathogens have developed a plethora of strategies to undermine host immune defenses in order to guarantee their survival. For large DNA viruses, these immune evasion mechanisms frequently rely on the expression of genes acquired from host genomes. Horizontally transferred genes include members of the immunoglobulin superfamily (IgSF), whose products constitute the most diverse group of proteins of vertebrate genomes. Their promiscuous immunoglobulin domains, which comprise the building blocks of these molecules, are involved in a large variety of functions mediated by ligand-binding interactions...
April 6, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28363871/impact-of-antibody-subclass-and-disulfide-isoform-differences-on-the-biological-activity-of-cd200r-and-%C3%AE-klotho-agonist-antibodies
#7
Ognjen Grujic, Jennitte Stevens, Robert Y-T Chou, Jennifer V Weiszmann, Laura Sekirov, Christy Thomson, Anita Badh, Stephanie Grauer, Brian Chan, Kevin Graham, Kathy Manchulenko, Thomas M Dillon, Yang Li, Ian N Foltz
Agonism of cell surface receptors by monoclonal antibodies is dependent not only on its ability to bind the target, but also to deliver a biological signal through receptors to the cell. Immunoglobulin G2 antibodies (IgG2s) are made up of a mixture of distinct isoforms (IgG2-A, -B and A/B), which differ by the disulfide connectivity at the hinge region. When evaluating panels of agonistic antibodies against CD200 receptor (CD200R) or βklotho receptor (βklotho), we noticed striking activity differences of IgG1 or IgG2 antibodies with the same variable domains...
March 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28333899/-stem-progenitor-cells-in-diseases-of-the-respiratory-tract
#8
EDITORIAL
Tadeusz Płusa
Stem cells (SCs - stem cells) are characterized by plasticity and the ability to differentiate into other cell types. They are obtained from bone marrow, peripheral blood and cord blood. Mesenchymal stem cells (MSCs) shows a broad immunomodulating, increases the number of regulatory T cells (Treg), modifies the activity of T cells, dendritic cells and NK (natural killer). Direct impact on reducing the release of proinflammatory cytokines and increased release of proinflammatory cytokines. Within the respiratory tract has a number of resident stem and progenitor cells referred to as L-MSCs (lung mesenchymal stem cells) whose presence was confirmed by markers as defined in the trachea, epithelial cells and alveolar...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28326648/changes-in-expression-of-the-cd200-tolerance-signaling-molecule-and-its-receptor-cd200r-by-villus-trophoblasts-during-first-trimester-missed-abortion-and-in-chronic-histiocytic-intervillositis
#9
David A Clark, Jennifer M Dmetrichuk, Elizabeth McCready, Sukhbinder Dhesy-Thind, Jorge L Arredondo
PROBLEM: Expression of CD200 at the feto-maternal interface is associated with successful murine and human pregnancy. CD200 binding to CD200 receptors on lymphomyeloid cells suppresses inflammation and induces Tregs. CD200 receptors are also expressed on mouse and human placental trophoblast cells. What is the expression of CD200 and CD200R in human missed abortions which have preserved Treg levels and in chronic histiocytic intervillositis (CHI) where maternal inflammatory cells cause IUGR? METHODS: Immunohistiochemistry for CD200, CD200R, and Ki67 using human placental sections from missed abortions, term placenta, and CHI...
March 22, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28295880/mesenchymal-stem-cells-modulate-differentiation-of-myeloid-progenitor-cells-during-inflammation
#10
Afsaneh Amouzegar, Sharad K Mittal, Anuradha Sahu, Srikant K Sahu, Sunil K Chauhan
Mesenchymal stem cells (MSCs) possess distinct immunomodulatory properties and have tremendous potential for use in therapeutic applications in various inflammatory diseases. MSCs have been shown to regulate pathogenic functions of mature myeloid inflammatory cells, such as macrophages and neutrophils. Intriguingly, the capacity of MSCs to modulate differentiation of myeloid progenitors (MPs) to mature inflammatory cells remains unknown to date. Here, we report the novel finding that MSCs inhibit the expression of differentiation markers on MPs under inflammatory conditions...
March 15, 2017: Stem Cells
https://www.readbyqxmd.com/read/28280765/data-on-ho-1-and-cd200-protein-secretion-during-t-cells-and-mesenchymal-stromal-cells-co-cultures
#11
Mohammad Fayyad-Kazan, Hussein Fayyad-Kazan, Makram Merimi, Nathalie Meuleman, Dominique Bron, Laurence Lagneaux, Mehdi Najar
In this Data in Brief, we have provided data describing the secretion profile of two main immunoregulatory proteins, heme oxygenase-1 (HO-1) and CD200, from bone marrow (BM), Wharton׳s Jelly (WJ) or adipose tissue (AT) mesenchymal stromal cells (MSCs) being cultivated either in the absence or presence of activated T-cells. Whilst HO-1 is a stress-responsive enzyme displaying diverse cytoprotective effects, CD200 is a membrane glycoprotein delivering immunoregulatory signals following interaction with its receptor (CD200R)...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28179401/high-serum-soluble-cd200-levels-in-patients-with-autosomal-dominant-polycystic-kidney-disease
#12
Funda Sari, Saadet Gumuslu, Ramazan Cetinkaya, Metin Sarikaya, Arzu Didem Yalcin
CD200 is a novel immune-effective molecule, existing in a cell membrane-bound form, as well as in a soluble form in serum, which performs to modulate inflammatory and acquired immune responses. Autosomal dominant polycystic kidney disease (ADPKD) is characterized by the development of large renal cysts and progressive loss of renal function. As defects in cell cycle arrest and apoptosis of renal tubular epithelial cells occur in ADPKD, we asked whether serum soluble CD200 might underlie and effect on ADPKD...
April 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28164626/expression-of-cd200r1-and-its-ligand-cd200-on-t-helper-lymphocytes-of-pediatric-patients-with-ulcerative-colitis-and-crohn-s-disease
#13
Mohamed F Elshal, Alia M Aldahlawi, Omar I Saadah, J Philip Mccoy
BACKGROUND: CD200 and its receptor CD200R are both type I membrane glycoproteins that modulate the activity of myeloid and lymphoid cells, and their interaction is functionally important in the suppression of effector T-cell responses by regulatory T-cells. We aimed to investigate the extent of expression of CD200 and CD200R1 on CD4+ T-cells in blood of children with ulcerative colitis (UC) and Crohn's disease (CD) and to explore their correlations with effector T cell subsets, regulatory T cells (Treg), and routine clinical and serological markers...
August 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164283/monocytes-microglia-and-cd200-cd200r1-signaling-are-essential-in-the-transmission-of-inflammation-from-the-periphery-to-the-central-nervous-system
#14
Xin Xie, Xiaoguang Luo, Na Liu, Xiaohong Li, Fan Lou, Yumin Zheng, Yan Ren
Peripheral inflammation is known to trigger neuroinflammation and neurodegenerative disease. However, the key components during the propagation of inflammation from the periphery to the central nervous system (CNS) remain unclear. Lipopolysaccharide (LPS) was administered to Sprague-Dawley rats to induce peripheral inflammation. An intravenous injection and an intranigral injection of clodronate liposomes were given to deplete monocytes and microglia, respectively. Recombinant CD200 fusion protein (CD200Fc) or an anti-CD200R1 antibody was injected into the substantia nigra to manipulate the involvement of CD200 and CD200R1...
April 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28152413/over-expression-of-cd200-predicts-poor-prognosis-in-mds
#15
Jia-Xi Chen, Li-Ping Mei, Bao-Guo Chen, Dong-Lian Wang, Wen-da Luo, Li-Fei Luo, Ruyue Lu, Rui Zheng, Li Zhang
BACKGROUND: We studied the expression of CD200 in a series of 101 patients with diagnosis of myelodysplastic syndrome (MDS), to evaluate its impact on outcome and its possible association with other known prognostic factors. MATERIAL/METHODS: The CD200 was detected by flow cytometry, and the chromosome karyotypes were determined by G banding respectively. The Mann-Whitney U test was used to analyze the association among CD200 expression and clinical features. In addition, the overall survival and AML transformation of the MDS patients according to the expression level of CD200 was also explored...
May 2017: Leukemia Research
https://www.readbyqxmd.com/read/28123029/newly-formed-endothelial-cells-regulate-myeloid-cell-activity-following-spinal-cord-injury-via-expression-of-cd200-ligand
#16
Merav Cohen, Hila Ben-Yehuda, Ziv Porat, Catarina Raposo, Siamon Gordon, Michal Schwartz
The central nervous system (CNS) is endowed with several immune-related mechanisms that contribute to its protection and maintenance in homeostasis and under pathology. Here, we discovered an additional mechanism that controls inflammatory responses within the CNS milieu under injurious conditions, involving CD200 ligand (CD200L) expressed by newly formed endothelial cells. We observed that CD200L is constitutively expressed in the mouse healthy CNS by endothelial cells of the blood-cerebrospinal fluid barrier and of the spinal cord meninges, but not by the endothelium of the blood-spinal cord barrier...
January 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28092020/early-life-social-isolation-induced-depressive-like-behavior-in-rats-results-in-microglial-activation-and-neuronal-histone-methylation-that-are-mitigated-by-minocycline
#17
Hong-Tao Wang, Fu-Lian Huang, Zhao-Lan Hu, Wen-Juan Zhang, Xiao-Qing Qiao, Yan-Qing Huang, Ru-Ping Dai, Fang Li, Chang-Qi Li
Early-life stress is a potent risk factor for development of psychiatric conditions such as depression. The underlying mechanisms remain poorly understood. Here, we used the early-life social isolation (ESI) model of early-life stress in rats to characterize development of depressive-like behavior, the role of microglia, levels of histone methylation, as well as expression of glutamate receptor subunits in the hippocampus. We found that depressive-like behavior was induced after ESI as determined by sucrose preference and forced swimming tests...
January 16, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28073173/expression-of-cd43-in-chronic-lymphoproliferative-leukemias
#18
Marc Sorigue, Jordi Juncà, Edurne Sarrate, Javier Grau
BACKGROUND: CD43 has been used on histological samples for the differential diagnosis of lymphoproliferative disorders but there is scarce data on its use by flow cytometry (FC). We set out to characterize the expression of CD43 by FC in B-cell lymphoproliferative disorders and to determine its possible role in the differential diagnosis of these malignancies. METHODS: We analyzed the expression of CD43 in clonal B-cell lymphoproliferative disorders with exclusive peripheral blood and/or bone marrow involvement based on their Moreau chronic lymphocytic leukemia (CLL) score with particular emphasis on Moreau CLL score 3 (MS3) cases, which often present a diagnostic challenge...
January 10, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28040463/umbilical-cord-tissue-derived-mesenchymal-stromal-cells-maintain-immunomodulatory-and-angiogenic-potencies-after-cryopreservation-and-subsequent-thawing
#19
Rita N Bárcia, Jorge M Santos, Mariana Teixeira, Mariana Filipe, Ana Rita S Pereira, Augusto Ministro, Ana Água-Doce, Manuela Carvalheiro, Maria Manuela Gaspar, Joana P Miranda, Luis Graça, Sandra Simões, Susana Constantino Rosa Santos, Pedro Cruz, Helder Cruz
BACKGROUND AIMS: The effect of cryopreservation on mesenchymal stromal cell (MSC) therapeutic properties has become highly controversial. However, data thus far have indiscriminately involved the assessment of different types of MSCs with distinct production processes. This study assumed that MSC-based products are affected differently depending on the tissue source and manufacturing process and analyzed the effect of cryopreservation on a specific population of umbilical cord tissue-derived MSCs (UC-MSCs), UCX(®)...
December 28, 2016: Cytotherapy
https://www.readbyqxmd.com/read/27994015/newly-formed-endothelial-cells-regulate-myeloid-cell-activity-following-spinal-cord-injury-via-expression-of-cd200-ligand
#20
Merav Cohen, Hila Ben-Yehuda, Ziv Porat, Catarina Raposo, Siamon Gordon, Michal Schwartz
The central nervous system (CNS) is endowed with several immune-related mechanisms that contribute to its protection and maintenance in homeostasis and under pathology. Here, we discovered an additional mechanism that controls inflammatory responses within the CNS milieu under injurious conditions, involving CD200 ligand (CD200L) expressed by newly-formed endothelial cells. We observed that CD200L is constitutively expressed in the mouse healthy CNS by endothelial cells of the blood-cerebrospinal fluid barrier and of the spinal cord meninges, but not by the endothelium of the blood-spinal cord barrier...
December 19, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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