Search Results
Results 1451 - 1500 of 24431

Current sort is by relevancy. Click to sort by publication date

< 25 26 27 28 29 30 31 32 33 34 35 >
Sumitomo M - - 1989
The epithelial properties of the cells in six cases of synovial sarcoma, five biphasic and one monophasic, were examined. Epithelial cells formed well demarcated glandular nests with a multi- or single-layered lining, poorly defined nest-like clusters, or appeared as scattered single plump cells in a spindle-cell stroma. Keratinization was seen ...
Relevancy Score: Relevancy Score: 361
Bauer Nicola - - 2011
The differentiation of stem cells is a fundamental process in cell biology and understanding its mechanism might open a new avenue for therapeutic strategies. Using an ex vivo co-culture system consisting of human primary haematopoietic stem and progenitor cells growing on multipotent mesenchymal stromal cells as a feeder cell layer, ...
Relevancy Score: Relevancy Score: 361
García-Suárez Olivia O Department of Morphology and Cell Biology, Universidad de Oviedo , Oviedo , - - 2014
Neuroendocrine tumors (NETs) are found throughout the body and are important as they give rise to distinct clinical syndromes. Glycosaminoglycans, in proteoglycan (PG) form or as free chains, play vital roles in every step of tumor progression. Analyzing tumor samples with different degrees of histological differentiation we determined the existence ...
Relevancy Score: Relevancy Score: 361
Mosley R L - - 1992
Adult athymic, lethally irradiated, F1-->parent bone marrow-reconstituted (AT x BM) mice were engrafted bilaterally with day 16-18 fetal intestine or fetal thymus into the kidney capsule and were studied for evidence of peripheral T cell repopulation of 1-12 wk postengraftment. Throughout that time period, both types of grafts were macroscopically ...
Relevancy Score: Relevancy Score: 361
Gustafsson Anna C - - 2005
Cancer prevention trials using different types of antioxidant supplements have been carried out at several occasions and one of the investigated compounds has been the antioxidant N-acetyl-L-cysteine (NAC). Studies at the cellular level have previously demonstrated that a single supplementation of NAC induces a ten-fold more rapid differentiation in normal ...
Relevancy Score: Relevancy Score: 361
Kaczmarek Julita J Institute of Molecular Medicine at the LIMES Institute, University of Bonn, Bonn, - - 2014
The initiation of adaptive immunity requires cell-to-cell contact between T cells and antigen-presenting cells. Together with immediate TCR signal transduction, the formation of an immune synapse (IS) is one of the earliest events detected during T cell activation. Here, we show that interaction of liver sinusoidal endothelial cells (LSEC) with ...
Relevancy Score: Relevancy Score: 361
Inman Charlotte F - - 2012
Interactions between the early-life colonising intestinal microbiota and the developing immune system are critical in determining the nature of immune responses in later life. Studies in neonatal animals in which this interaction can be examined are central to understanding the mechanisms by which the microbiota impacts on immune development and ...
Relevancy Score: Relevancy Score: 361
Baker B M - - 2001
Structural studies have shown that class I major histocompatibility complex (MHC)-restricted peptide-specific T cell receptor (TCR)-alpha/betas make multiple contacts with the alpha1 and alpha2 helices of the MHC, but it is unclear which or how many of these interactions contribute to functional binding. We have addressed this question by performing ...
Relevancy Score: Relevancy Score: 360
Lundberg Kristina - - 2013
Dendritic cells (DCs) comprise heterogeneous populations of cells, which act as central orchestrators of the immune response. Applicability of primary DCs is restricted due to their scarcity and therefore DC models are commonly employed in DC-based immunotherapy strategies and in vitro tests assessing DC function. However, the interrelationship between the ...
Relevancy Score: Relevancy Score: 360
Nawaz Hossain M - - 2012
A central question within biology is how intracellular signaling pathways are maintained throughout evolution. Btk29A is considered to be the fly-homolog of the mammalian Bruton's tyrosine kinase (Btk), which is a non-receptor tyrosine-kinase of the Tec-family. In mammalian cells, there is a single transcript splice-form and the corresponding Btk-protein plays ...
Relevancy Score: Relevancy Score: 360
Scheeren R A - - 1991
The relationship of dendritic cells (DC) isolated from the peripheral blood to those of lymphoid tissue is, in terms of maturation and function, incompletely understood. In our present study, we have explored the molecular basis of adhesion of T cells to blood DC. Analysis of the expression of adhesion receptors ...
Relevancy Score: Relevancy Score: 360
Damle N K - - 1987
Regulation of the immune response in man is largely dependent on interactions between cells of the cluster designation 4+ (CD4+) helper/inducer sublineage and the CD8+ suppressor/cytotoxic sublineage. When cultured with autologous antigen-primed CD4+ lymphocytes, CD8+ cells differentiate into suppressor T cells (Ts) that specifically inhibit the response of fresh autologous ...
Relevancy Score: Relevancy Score: 360
Eswarappa Sandeepa M - - 2008
BACKGROUND: The species Salmonella enterica (S. enterica) includes many serovars that cause disease in avian and mammalian hosts. These serovars differ greatly in their host range and their degree of host adaptation. The host specificity of S. enterica serovars appears to be a complex phenomenon governed by multiple factors acting ...
Relevancy Score: Relevancy Score: 360
Patel Ami - - 2012
Certain short peptides do not occur in humans and are rare or non-existent in the universal proteome. Antigens that contain rare amino acid sequences are in general highly immunogenic and may activate different arms of the immune system. We first generated a list of rare, semi-common, and common 5-mer peptides ...
Relevancy Score: Relevancy Score: 360
Yin G - - 2013
Epithelial-mesenchymal transition (EMT) is a critical process for embryogenesis but is abnormally activated during cancer metastasis and recurrence. This process enables epithelial cancer cells to acquire mobility and traits associated with stemness. It is unknown whether epithelial stem cells or epithelial cancer stem cells are able to undergo EMT, and ...
Relevancy Score: Relevancy Score: 360
Lavoie Jean-Pierre - - 2012
Gene expression analyses are used to investigate signaling pathways involved in diseases. In asthma, they have been primarily derived from the analysis of bronchial biopsies harvested from mild to moderate asthmatic subjects and controls. Due to ethical considerations, there is currently limited information on the transcriptome profile of the peripheral ...
Relevancy Score: Relevancy Score: 360
de Meester I - - 1993
The CD26 activation antigen (Ag) which is expressed on a subpopulation of human T cells has been characterized as dipeptidyl peptidase IV (DPP IV, EC 3.4.14.5). In this paper, we describe the antibody binding profile of CD26/DPP IV, purified from human peripheral blood lymphocytes. The purified molecule binds to the ...
Relevancy Score: Relevancy Score: 360
Li Shiyong - - 2004
We compared the antigen expression profile of thymocytes in lymphocyte-rich thymoma with that of precursor T-cell acute lymphoblastic leukemia/lymphoblastic lymphoma (T-cell ALL/LBL) cells using 4-colorflow cytometry. In all 15 thymoma cases, the thymocytes demonstrated 3 distinct subpopulations. The least mature cells (double-negative) expressed low-density CD2 and CD5, high-density CD7, CD10, ...
Relevancy Score: Relevancy Score: 360
Veréb Zoltán - - 2013
The surface of the human eye is covered by corneal epithelial cells (CECs) which regenerate from a small population of limbal epithelial stem cells (LESCs). Cell therapy with LESCs is a non-penetrating treatment for preventing blindness due to LESC deficiency or dysfunction. Our aim was to identify new putative molecular ...
Relevancy Score: Relevancy Score: 359
Cho S - - 1991
The region of the murine major histocompatibility complex (MHC) between the Pb (A beta 3) and Ob (A beta 2) genes controls the expression of an intracellular complex named the LMP (low molecular weight polypeptide) complex. DNA probes for at least seven different genes mapping to this region were isolated. ...
Relevancy Score: Relevancy Score: 359
Brunekreeft Kim L - - 2014
Stimulation of CD40 can augment anti-cancer T cell immune responses by triggering effective activation and maturation of antigen-presenting cells (APCs). Although CD40 agonists have clinical activity in humans, the associated systemic activation of the immune system triggers dose-limiting side-effects. To increase the tumor selectivity of CD40 agonist-based therapies, we developed ...
Relevancy Score: Relevancy Score: 359
Cruse Julius M - - 2007
Flow cytometric analysis of cluster of differentiation (CD) markers of myeloid cells has been used in conjunction with cell morphology to diagnose chronic myelogenous leukemia (CML). In the present study, 16 cases of CML were studied for levels of expression of myeloid markers CD15, CD13, CD33, and CALLA, i.e., CD10 ...
Relevancy Score: Relevancy Score: 359
Köberle Martin - - 2012
Mast cells (MC) are key mediators of the immune system, most prominently known for their role in eliciting harmful allergic reactions. Mast cell mediator release (e.g. by degranulation) is triggered by FcεRI recognition of antigen - IgE complexes. Until today no therapeutic targeting of this and other mast cell activation ...
Relevancy Score: Relevancy Score: 359
Amelio Ivano I Department of Experimental Medicine and Biochemical Sciences, University of Rome Tor Vergata, Rome, - - 2012
During keratinocyte differentiation and stratification, cells undergo extensive remodeling of their actin cytoskeleton, which is important to control cell mobility and to coordinate and stabilize adhesive structures necessary for functional epithelia. Limited knowledge exists on how the actin cytoskeleton is remodeled in epithelial stratification and whether cell shape is a ...
Relevancy Score: Relevancy Score: 359
Penmatsa Himabindu - - 2010
Formation of multiple-protein macromolecular complexes at specialized subcellular microdomains increases the specificity and efficiency of signaling in cells. In this study, we demonstrate that phosphodiesterase type 3A (PDE3A) physically and functionally interacts with cystic fibrosis transmembrane conductance regulator (CFTR) channel. PDE3A inhibition generates compartmentalized cyclic adenosine 3',5'-monophosphate (cAMP), which further ...
Relevancy Score: Relevancy Score: 358
Winitsky Steve O - - 2005
It has long been held as scientific fact that soon after birth, cardiomyocytes cease dividing, thus explaining the limited restoration of cardiac function after a heart attack. Recent demonstrations of cardiac myocyte differentiation observed in vitro or after in vivo transplantation of adult stem cells from blood, fat, skeletal muscle, ...
Relevancy Score: Relevancy Score: 358
Inoue Seiichiro S Department of Hepato-Biliary-Pancreatic and Pediatric Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama 3508550, - - 2014
Chemotherapy of malignant tumors induces tumor cell death. Numerous antitumor agents induce apoptosis of tumor cells, which are subsequently engulfed by phagocytes, initiating an immune reaction. The induction of immunogenic cell death by antitumor agents may be advantageous for antitumor immunity. The purpose of this study was to determine whether ...
Relevancy Score: Relevancy Score: 358
Mori T - - 1999
We applied organotypic slice culture of neonatal mouse liver tissues to maintain the parenchymal cells in ontogenesis and to investigate their proliferation and differentiation. Cultured tissue spread gradually over 3 weeks. Small basophilic cells formed several layers in the center of the cultured tissues, and a monolayer of polygonal cells ...
Relevancy Score: Relevancy Score: 358
Hattoum Alex A Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, - - 2013
Liver regeneration under normal circumstances proceeds through proliferation of all cellular elements of the liver. Studies with rodent models have shown that when proliferation of hepatocytes is inhibited, progenitor cells arising from the biliary compartment transdifferentiate into "oval/progenitor" cells, which proceed to differentiate into hepatocytes. Recent studies have shown that ...
Relevancy Score: Relevancy Score: 358
Rossi Benjamin - - 2006
Interactions between B cell progenitors and bone marrow stromal cells are essential for normal B cell differentiation. We have previously shown that an immune developmental synapse is formed between human pre-B and stromal cells in vitro, leading to the initiation of signal transduction from the pre-BCR. This process relies on ...
Relevancy Score: Relevancy Score: 358
Kronin V - - 2001
Dendritic cells (DC), in their role in initiation of the adaptive immune response, have been extensively studied for their capacity to interact and stimulate naive T cells. Subsets of mature murine DC isolated directly from the spleen have been shown to differ in their ability to induce proliferative responses in ...
Relevancy Score: Relevancy Score: 358
Flores-Romo L - - 1997
Human CD34+ multilineage progenitor cells (CD34HPC) from cord blood and bone marrow express CD40, a member of the tumor necrosis factor-receptor family present on various hematopoietic and nonhematopoietic cells. As hyper-IgM patients with mutated CD40 ligand (CD40L) exhibit neutropenia, no B cell memory, and altered T cell functions leading to ...
Relevancy Score: Relevancy Score: 358
Wang Xiaoming - - 2014
Adipose tissue-derived stromal cells (ADSCs) are abundant and easy to obtain, but the diversity of differentiation potential from different locations may vary upon the developmental origin of their mesenchymal compartment. We therefore aim to compare the myogenic differentiation and reparative activity of ADSCs derived from the pericardial tissue to ADSCs ...
Relevancy Score: Relevancy Score: 358
Graefe Sebastian E B - - 2006
Variation between inbred mice of susceptibility to experimental Trypanosoma cruzi infection has frequently been described, but the immunogenetic background is poorly understood. The outcross of the susceptible parental mouse strains C57BL/6 (B6) and DBA/2 (D2), B6D2F1 (F1) mice, is highly resistant to this parasite. In the present study we show ...
Relevancy Score: Relevancy Score: 358
Zhao Yuguang Y Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, - - 2014
The tumor antigen 5T4/WAIF1 (Wnt-activated inhibitory factor 1; also known as Trophoblast glycoprotein TPBG) is a cell surface protein targeted in multiple cancer immunotherapy clinical trials. Recently, it has been shown that 5T4/WAIF1 inhibits Wnt/β-catenin signaling, a signaling system central to many developmental and pathological processes. Wnt/β-catenin signaling is controlled by ...
Relevancy Score: Relevancy Score: 358
Souazé Frédérique - - 2013
Hath1, a bHLH transcription factor negatively regulated by the γ-secretase-dependent Notch pathway, is required for intestinal secretory cell differentiation. Our aim was fourfold: 1) determine whether Hath1 is able to alter the phenotype of colon cancer cells that are committed to a differentiated phenotype, 2) determine whether the Hath1-dependent alteration ...
Relevancy Score: Relevancy Score: 358
Cantile Monica - - 2013
Liposarcoma (LPS) is the most common soft tissue neoplasm in adults and is characterized by neoplastic adipocyte proliferation. Some subtypes of LPSs show aberrations involving the chromosome 12. The most frequent are t(12;16) (q13;p11) present in more than 90% of myxoid LPSs and 12q13-15 amplification in well-differentiated and dedifferentiated LPSs. In ...
Relevancy Score: Relevancy Score: 358
Miller Ronald A - - 2008
Remarkably, although cardiac disease accounts for the largest proportion of adult mortality and morbidity in the industrialized world, the genetic programs controlling early cardiogenesis are largely incompletely understood. To better understand this process, we set out to identify genes whose expression is enriched within early cardiac fated populations, obtaining the ...
Relevancy Score: Relevancy Score: 358
Zhu Dongmei - - 2009
Embryonic stem cells (ES cells) can differentiate into cells derived from all three germ layers and extraembryonic tissues. While transcription factors such as, Oct4 and Nanog are well known for their requirements for undifferentiated ES cell growth, mechanisms of epigenetic repression of germ layer specific differentiation in ES cells are ...
Relevancy Score: Relevancy Score: 358
Azrak Sami S - - 2013
4-Hydroxy-tamoxifen (4OHT) triggers Cre-mediated K-Ras removal in [H-Ras-/-;N-Ras-/-;K-Raslox/lox;RERTert/ert] fibroblasts, generating growth-arrested "Rasless" MEFs which are able to recover their proliferative ability after ectopic expression of Ras oncoproteins or constitutively active BRAF or MEK1. Comparison of the transcriptional profiles of Rasless fibroblasts with those of MEFs lacking only H-Ras and N-Ras ...
Relevancy Score: Relevancy Score: 357
Larreta Ruth - - 2004
BACKGROUND: Exposure of Leishmania promastigotes to the temperature of their mammalian hosts results in the induction of a typical heat shock response. It has been suggested that heat shock proteins play an important role in parasite survival and differentiation. RESULTS: Here we report the studies on the expression of the ...
Relevancy Score: Relevancy Score: 357
Chenet Stella M - - 2012
Regardless of the growing interest in detecting population structures in malarial parasites, there have been limited discussions on how to use this concept in control programmes. In such context, the effects of the parasite population structures will depend on interventions' spatial or temporal scales. This investigation explores the problem of ...
Relevancy Score: Relevancy Score: 357
Ochiai H - - 1982
Monoclonal antibodies against a glycoprotein presumably involved in adhesion of aggregating Dictyostelium discoideum cells have been used for labeling of the antigen at the cell surface. The antigen is distributed over the whole surface of the cells, apparently in form of small clusters. The antigen appears concomitantly with the acquisition ...
Relevancy Score: Relevancy Score: 357
Lyons-Weiler James - - 2004
Microarray studies in cancer compare expression levels between two or more sample groups on thousands of genes. Data analysis follows a population-level approach (e.g., comparison of sample means) to identify differentially expressed genes. This leads to the discovery of 'population-level' markers, i.e., genes with the expression patterns A > B ...
Relevancy Score: Relevancy Score: 357
Kim H J - - 2000
Normally the immune response is restricted to the peripheral secondary lymphoid organs. However, additional ectopic lymphoid tissue may develop at chronic sites of inflammation. In the synovium of rheumatoid arthritis patients the local production of proinflammatory cytokines seems to support the formation of a precisely structured microenvironment, which allows an ...
Relevancy Score: Relevancy Score: 357
Agarwal Noopur - - 2007
There is increasing evidence of crosstalk between epigenetic modifications such as histone and DNA methylation, recognized by HP1 and methyl CpG-binding proteins, respectively. We have previously shown that the level of methyl CpG-binding proteins increased dramatically during myogenesis leading to large-scale heterochromatin reorganization. In this work, we show that the ...
Relevancy Score: Relevancy Score: 357
Hewitson James P - - 2013
Gastrointestinal nematode parasites infect over 1 billion humans, with little evidence for generation of sterilising immunity. These helminths are highly adapted to their mammalian host, following a developmental program through successive niches, while effectively down-modulating host immune responsiveness. Larvae of Heligmosomoides polygyrus, for example, encyst in the intestinal submucosa, before ...
Relevancy Score: Relevancy Score: 357
Zhan Fenghuang - - 2003
To identify genes linked to normal plasma cell (PC) differentiation and to classify multiple myeloma (MM) with respect to the expression patterns of these genes, we analyzed global mRNA expression in CD19-enriched B cells (BCs) from 7 tonsils, CD138-enriched PCs from 11 tonsils, 31 normal bone marrow samples, and 74 ...
Relevancy Score: Relevancy Score: 357
Addo Marylyn M - - 2007
CD8+ T cells impact control of viral infections by direct elimination of infected cells and secretion of a number of soluble factors. In HIV-1 infection, persistent HIV-1 specific IFN-gamma+ CD8+ T cell responses are detected in the setting of disease progression, consistent with functional impairment in vivo. Recent data suggest ...
Relevancy Score: Relevancy Score: 357
Zhu Jinfang - - 2009
Growth factor independent 1 (Gfi-1), a transcriptional repressor, is transiently induced during T cell activation. Interleukin (IL) 4 further induces Gfi-1, resulting in optimal Th2 cell expansion. We report a second important function of Gfi-1 in CD4 T cells: prevention of alternative differentiation by Th2 cells, and inhibition of differentiation ...
Relevancy Score: Relevancy Score: 357
< 25 26 27 28 29 30 31 32 33 34 35 >
Recent Searches

Search Terms in Title