نتایج جستجو برای: الگوریتم sdf

تعداد نتایج: 25753  

Journal: :Journal of neuroscience research 2010
Katja Rosenkranz Sandra Kumbruch Katrin Lebermann Katrin Marschner Arne Jensen Rolf Dermietzel Carola Meier

Previous studies have shown that transplanted human umbilical cord blood (hUCB)-derived mononuclear cells exert therapeutic effects in various animal models of CNS impairments, including those of perinatal hypoxic-ischemic brain injury. However, the mechanisms of how transplanted cells exert their beneficial effects on the damaged tissue are still unclear. As detection of hUCB cells at the lesi...

2007
Takayuki Nakayama Noriko Mutsuga Giovanna Tosato

The chemokine stromal cell–derived factor-1 (SDF-1) is constitutively expressed by bone marrow stromal cells and plays key roles in hematopoiesis. Fibroblast growth factor 2 (FGF2), a member of the FGF family that plays important roles in developmental morphogenic processes, is abnormally elevated in the bone marrow from patients with clonal myeloid disorders and other disorders where normal he...

Journal: :Blood 2000
M Majka A Janowska-Wieczorek J Ratajczak M A Kowalska G Vilaire Z K Pan M Honczarenko L A Marquez M Poncz M Z Ratajczak

The role of the chemokine binding stromal-derived factor 1 (SDF-1) in normal human megakaryopoiesis at the cellular and molecular levels and its comparison with that of thrombopoietin (TPO) have not been determined. In this study it was found that SDF-1, unlike TPO, does not stimulate alpha(IIb)beta(3)(+) cell proliferation or differentiation or have an antiapoptotic effect. However, it does in...

2013
Mu-Han Lü Chang-Jiang Hu Ling Chen Xi Peng Jian Chen Jiong-Yu Hu Miao Teng Guang-Ping Liang

BACKGROUND Interactions between stromal cell-derived factor-1α (SDF-1α) and its cognate receptor CXCR4 are crucial for the recruitment of mesenchymal stem cells (MSCs) from bone marrow (BM) reservoirs to damaged tissues for repair during alarm situations. MicroRNAs are differentially expressed in stem cell niches, suggesting a specialized role in stem cell regulation. Here, we gain insight into...

Journal: :Blood 2000
N Onai Y y Zhang H Yoneyama T Kitamura S Ishikawa K Matsushima

Both SDF-1 and CXCR4 disruption are lethal to mice at the embryonic stage and cause abnormalities in B lymphopoiesis, myelopoiesis, cardiogenesis, vasculogenesis, and cerebellar development. To investigate the role of SDF-1 and CXCR4 in hematopoiesis during the adult stage, mice reconstituted with bone marrow-derived hematopoietic progenitor cells transduced with either the SDF-1 or a genetical...

Journal: :The Journal of clinical investigation 2000
T Ponomaryov A Peled I Petit R S Taichman L Habler J Sandbank F Arenzana-Seisdedos A Magerus A Caruz N Fujii A Nagler M Lahav M Szyper-Kravitz D Zipori T Lapidot

The chemokine stromal-derived factor-1 (SDF-1) controls many aspects of stem cell function. Details of its regulation and sites of production are currently unknown. We report that in the bone marrow, SDF-1 is produced mainly by immature osteoblasts and endothelial cells. Conditioning with DNA-damaging agents (ionizing irradiation, cyclophosphamide, and 5-fluorouracil) caused an increase in SDF-...

Journal: :European journal of research in dentistry 2023

Although a decrease in the prevalence of dental caries, which is chronic disease, has been reported many developed countries, early childhood caries (ECC) as an disease common, especially developing countries. Silver diamine fluoride (SDF) stops prevents formation and reduces tooth sensitivity. The biggest feature that distinguishes SDF from other agents prevent it effectively process. This eff...

Journal: :Electr. Notes Theor. Comput. Sci. 2004
Mark van den Brand Jørgen Iversen Peter D. Mosses

Introduction When writing semantic descriptions of programming languages it is highly desirable to reuse descriptions of constructs from previous language descriptions. This is usually not possible without adaptations, due to the lacking modularity of the formalism used. In [3] Doh and Mosses proposed organizing language descriptions such that each construct is described in a separate module, w...

2013
Jean-Philippe Chancelier

Using a definition of ASF sequences derived from the definition of asymptotic contractions of the final type of ACF, we give some new fixed points theorem for cyclic mappings and alternating mapping which extend results from [9, Theorem 2] and [10, Theorem 1].

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