LFA-1/ICAM-1 ligation in T-cells influences both Notch and TGF-β pathways Navin K. Verma...
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Transcript of LFA-1/ICAM-1 ligation in T-cells influences both Notch and TGF-β pathways Navin K. Verma...
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LFA-1/ICAM-1 ligation in T-cells influences both Notch and TGF- pathwaysNavin K. [email protected]
T-cell migration into inflamed tissuesN Engl J Med 1999; 341:1817-28.
T-cell migration in health and diseases
Uncontrolled T-cell traffickingChronic inflammatory diseases
Regulated T-cell migration
Immune response regulations
4Resting T-cellsMigrating T-cellsOng et al, 2014, J Biol Chem; Volkov et al, 2001, Nat ImmunolLFA-1 ICAM-1Laboratory model of T-cell migration
Receptor activation
4
LFA-1/ICAM-1: changes in gene expressionTGF- pathwayNotch pathwayVerma et al. (2012) J Biol ChemLFA-1/ICAM-1 up-regulates both TGF- inhibitory molecules and Notch signalling proteins(verified by RT-qPCR)
TGF- pathwayNotch pathwayVerma et al. (2012) J Biol Chem
Notch Pathway: LFA-1/ICAM-1 activates Notch signallingUnpublished data
pCBF1-Luc reporter123
LFA-1/ICAM-1 activates Notch signalling
NICD
Hey1
Hes1
-TubulinTime on ICAM-1 (h) 0 1 3 6 12Unpublished data3LFA-1 regulates Notch via Akt/ERK/GSK3 signalling axis
10
LFA-1/ICAM-1 favors Notch-dependent Th1 polarization
Unpublished dataNotch Pathway summary
TGF- pathway: LFA-1/ICAM-1 up-regulates TGF- inhibitory molecules
Verma et al. (2012) J Biol Chem
LFA-1/ICAM-1-induced TGF- inhibitory pathway is dependent on STAT3 and/or JNK
Verma et al. (2012) J Biol Chem
LFA-1 stimulated T-cells are refractory to iTreg or Th17 differentiationiTregTh17HumanHumanHumanMouseMouseVerma et al. (2012) J Biol ChemUnpublished illustrationSMAD2SMAD3SMAD2SMAD3PPSMAD2SMAD3PPSMAD4LFA-1TGF-TGF- receptorInhibition of IL-2 secretion, Th17, iTregSTAT3STAT3PPJNKPICAM-1SMAD7SMURF2SKISMAD2SMAD3PPSMAD4SMURF2SKISMAD7STAT3STAT3PPc-Junc-FosAP-1PPLFA-1/ICAM-1 signalling TGF- signallingSummary: LFA-1/ICAM-1 induced TGF- refractoriness in T-cells
Funding supportLaboratory members
NavinFazilSeowCareyMadhaviJianhuiGraceAmuthaPraseetha
Existing collaborations
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