نتایج جستجو برای: ring alphabeta

تعداد نتایج: 123716  

Journal: :Frontiers in bioscience : a journal and virtual library 2004
Maria Raffaella Zocchi Alessandro Poggi

The effectors of mucosal and natural immunity (i.e. natural killer, NK, cells and NKT lymphocytes) are known to play an important role in host defence against tumors. Gammadelta T lymphocytes are the most represented cell populations in mucosal associated lymphoid tissue and share several characteristics of T and NK cells. Two main subsets of gammadelta T cells are known: one, expressing the Vd...

Journal: :iranian journal of science and technology (sciences) 2012
a. ersoy

the concept of fuzzy soft γ-ring is introduced; and some properties of fuzzy soft γ-rings are given. then the definitions of fuzzy soft γ-ideals are proposed and some of their theories are considered.

Journal: :The Journal of General Physiology 1998
Gregor K. Fyfe Cecilia M. Canessa

We have further characterized at the single channel level the properties of epithelial sodium channels formed by coexpression of alpha with either wild-type beta or gamma subunits and alpha with carboxy-terminal truncated beta (betaT) or gamma (gammaT) subunits in Xenopus laevis oocytes. alphabeta and alphabetaT channels (9.6 and 8.7 pS, respectively, with 150 mM Li+) were found to be constitut...

Journal: :Molecular pharmacology 2006
Christophe Blanquart Carmen Gonzalez-Yanes Tarik Issad

In cells expressing both the insulin receptor isoform A (IRA) and the insulin-like growth factor-1 receptor (IGF1R), the presence of hybrid receptors, made up of an alphabeta-IRA chain associated with an alphabeta-IGF1R chain, has been demonstrated. These heterodimers are found in normal cells, and they also seem to play crucial roles in a number of cancers. However, they remain difficult to st...

Journal: :International immunology 2003
Pascale Jullien Randy Q Cron Karim Dabbagh Aileen Cleary Li Chen Phung Tran Pamela Stepick-Biek David B Lewis

Neonatal CD4(+) T cells express less CD154 protein and mRNA than adult CD4(+) T cells after activation by calcium ionophore and phorbol ester, but the mechanism for this reduced expression and its relevance to the primary immune response remain unclear. We compared expression of CD154 protein and mRNA and CD154 gene promoter activity by purified naive (CD45RA(high)CD45RO(low)) neonatal and adul...

Journal: :Journal of molecular biology 2008
Alexander Schiffer Kristian Parey Eberhard Warkentin Kay Diederichs Harald Huber Karl O Stetter Peter M H Kroneck Ulrich Ermler

Conservation of energy based on the reduction of sulfate is of fundamental importance for the biogeochemical sulfur cycle. A key enzyme of this ancient anaerobic process is the dissimilatory sulfite reductase (dSir), which catalyzes the six-electron reduction of sulfite to hydrogen sulfide under participation of a unique magnetically coupled siroheme-[4Fe-4S] center. We determined the crystal s...

Journal: :The Journal of Experimental Medicine 2001
Joonsoo Kang Ariane Volkmann David H. Raulet

Two types of T cells, alphabeta and gammadelta, develop in vertebrates. How these two T cell lineages arise from a common thymic T progenitor is poorly understood. Differentiation of alphabeta lineage T cells requires the surrogate alpha chain (pTalpha), which associates with the T cell receptor (TCR) beta chain to form the pre-TCR. gammadelta lineage development does not appear to involve an o...

Journal: :British journal of pharmacology 2004
Sheldon M Joseph Matthew A Pifer Ronald J Przybylski George R Dubyak

1 Transient accumulation of extracellular ATP reflects both release of ATP from intracellular stores and altered rates of ATP metabolism by ecto-enzymes. Ecto-nucleoside triphosphate diphosphohydrolases (eNTPDases) and ecto-nucleotide pyrophosphatases (eNPPs) degrade ATP, while ecto-nucleotide diphosphokinases (eNDPKs) synthesize ATP from ambient ADP. 2 Although the methylene ATP analogs betaga...

Journal: :Respiratory Research 2003
Salvador Raga M Rosa Julià Catalina Crespí Joan Figuerola Natalia Martínez Joan Milà Núria Matamoros

BACKGROUND Gammadelta T cells have an important immunoregulatory and effector function through cytokine release. They are involved in the responses to Gram-negative bacterium and in protection of lung epithelium integrity. On the other hand, they have been implicated in airway inflammation. METHODS The aim of the present work was to study intracytoplasmic IL-2, IL-4, IFN-gamma and TNF-alpha p...

Journal: :Journal of immunology 2005
John Kuchtey Peter J Chefalo Reginald C Gray Lakshmi Ramachandra Clifford V Harding

Dendritic cells (DCs) internalize exogenous Ags and process them for cross-presentation by class I MHC (MHC-I) to CD8+ T cells. This processing can occur by transporter for Ag presentation (TAP)-dependent or TAP-independent mechanisms. We observed that CpG DNA enhanced cross-presentation of Ags by Flt-3L-cultured bone marrow-derived murine DCs by a type I IFN (IFN-alphabeta)-dependent mechanism...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید