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  • K objasnění úlohy NTAL v degranulaci žírných buněk jsme srovnali signalizační kroky zprostředkované FcepsilonRI v buňkách BMMC z myší s chybějícím NTAL a myší divokého typu. I když je NTAL strukturálně podobný LAT, degranulační odpovědi zprostředkované antigenem byly u žírných buněk s chybějícím NTAL nečekaně zvýšené. Nejčasněji zasaženým krokem byla zvýšená fosforylace tyrozinu LAT v buňkách aktivovaných antigenem. Současně s tím byla zvýšena fosforylace tyrozinu a enzymatická aktivita fosfolipázy C gama1 a fosfolipázy C gama2, což vedlo ke zvýšení hladin inozitol-1,4,5-trifosfátu a volného intracelulárního Ca2+. BMMC s chybějícím NTAL také vykazovaly zvýšenou aktivitu fosfatidyinozitol 3-OH kinázy protein tyrozin fosfatázy-2 obsahující doménu Src homologie 2. I když se předpokládá, že LAT i NTAL se nacházejí v membránových ostrůvcích, elektronová mikroskopie využívající imunitní reakce se zlatem na izolovaných vrstvách membrány prokázala jejich nezávislé shluky. Kombinovaná data u... (cs)
  • To clarify the role of NTAL in mast cell degranulation, we compared FcepsilonRI-mediated signaling events in BMMCs from NTAL-deficient and wild-type mice. Although NTAL is structurally similar to LAT, antigen-mediated degranulation responses were unexpectedly increased in NTAL-deficient mast cells. The earliest event affected was enhanced tyrosine phosphorylation of LAT in antigen-activated cells. This was accompanied by enhanced tyrosine phosphorylation and enzymatic activity of phospholipase C gamma1 and phospholipase C gamma2, resulting in elevated levels of inositol 1,4,5-trisphosphate and free intracellular Ca2+. NTAL-deficient BMMCs also exhibited an enhanced activity of phosphatidylinositol 3-OH kinase and Src homology 2 domain-containing protein tyrosine phosphatase-2. Although both LAT and NTAL are considered to be localized in membrane rafts, immunogold electron microscopy on isolated membrane sheets demonstrated their independent clustering. The combined data show that NT...
  • To clarify the role of NTAL in mast cell degranulation, we compared FcepsilonRI-mediated signaling events in BMMCs from NTAL-deficient and wild-type mice. Although NTAL is structurally similar to LAT, antigen-mediated degranulation responses were unexpectedly increased in NTAL-deficient mast cells. The earliest event affected was enhanced tyrosine phosphorylation of LAT in antigen-activated cells. This was accompanied by enhanced tyrosine phosphorylation and enzymatic activity of phospholipase C gamma1 and phospholipase C gamma2, resulting in elevated levels of inositol 1,4,5-trisphosphate and free intracellular Ca2+. NTAL-deficient BMMCs also exhibited an enhanced activity of phosphatidylinositol 3-OH kinase and Src homology 2 domain-containing protein tyrosine phosphatase-2. Although both LAT and NTAL are considered to be localized in membrane rafts, immunogold electron microscopy on isolated membrane sheets demonstrated their independent clustering. The combined data show that NT... (en)
Title
  • Negative regulation of mast cell signaling and function by the adaptor LAB/NTAL
  • Negativní regulace signalizace a funkce žírných buněk zprostředkovaná adaptorem LAB/NTAL (cs)
  • Negative regulation of mast cell signaling and function by the adaptor LAB/NTAL (en)
skos:prefLabel
  • Negative regulation of mast cell signaling and function by the adaptor LAB/NTAL
  • Negativní regulace signalizace a funkce žírných buněk zprostředkovaná adaptorem LAB/NTAL (cs)
  • Negative regulation of mast cell signaling and function by the adaptor LAB/NTAL (en)
skos:notation
  • RIV/68378050:_____/04:00108999!RIV/2005/AV0/A23005/N
http://linked.open.../vavai/riv/strany
  • 1001;1013
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA204/03/0594), P(GA301/03/0596), P(IAA5052310), P(LN00A026), Z(AV0Z5052915)
http://linked.open...iv/cisloPeriodika
  • 8
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 575666
http://linked.open...ai/riv/idVysledku
  • RIV/68378050:_____/04:00108999
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • mast cell; LAB/NTAL; cell signaling (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [6BD72DBD0D01]
http://linked.open...i/riv/nazevZdroje
  • Journal of Experimental Medicine
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 200
http://linked.open...iv/tvurceVysledku
  • Heneberg, Petr
  • Hořejší, Václav
  • Dráber, Petr
  • Dráberová, Lubica
  • Boubelík, Michael
  • Wilson, B. S.
  • Lebduška, Pavel
  • Šímová, Šárka
  • Lusková, Petra
  • Bugajev, V.
  • Mallisen, B.
  • Mallisen, M.
http://linked.open...n/vavai/riv/zamer
issn
  • 0022-1007
number of pages
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