<<

ISTH 2017 1334--PB aggregation This protects signaling high receptor Reelin expressed development by Reelin minutes, ( Figure Phalloidin) spread µg/ml) resting U/ml) Figure A A 1 C performed CRP Figure A Reelinphosphorylation induces of the Rac1/Cdc42effector PAK mg/ml) Reelin concentration Cell count in % Cell count in % I, 100 100 [pg/ml] 10 20 30 40 50 60 70 80 90 10 20 30 40 50 60 70 80 90 and . Cajal 0 0 ( shear Irena Krüger, 4 platelets on 1 10 prompted 100 150 200 250 Reelinin platelets ispresentandupon released activation 50 : : 3 n= 0 binds is µg/ml) Reelin : Reelin . without immobilized CRP 3 Scale Reelin against in Reeler rest - 2 Reelin 5 known + - Reelin supports lamellipodiaformation in + . t Retzius perceived perceived hr hr rec.+thr/rec.Rln Rln+ t with (ApoER (B) hr hr +rec.thr/rec.Rln +Rln in 20 min suggesting : ( without . for 10 60 min is is bar . Anti to stimulation platelets is 10 min Wildtype phosphorylated supporting a µg/ml) thrombin platelets, 1 10 Recent important - - platelet DO NOT have a financial interest/arrangement or affiliation with one or more organizations that could be amyloid Irena Krger Platelet Signaling Reelin and deficient human to Aslan Aslan as stimulation, µm DisclosureStatement ofFinancial Interest et al et as as mice are protectedmice are againstarterial 60 min Thrombin 2 , 2 ., American American 2013Journal., Physiology, of . analyze respectively an and ) minutes stimulation G a and . rl rl and 10 - real real cytoskeletal / +/+ - lamellipodia for after 40 min cells adherent filopodia lamellipodia Reeler that extracellular Consequently, . after 40 min precursor studies stimulated where (C) PAK 10 min CRP bar or or mice . is and (A) apparent apparent conflict Reelin Reelin platelets graphs and ( the for ( 0 important 100 with . Reelin 008 60 min CRP mediating 10 B PAK (Reeler) it formation supernatant lysat with wt µg/ml is U/ml) role and recombinant 2 provide depict Aim of theProject Clinic for ,Clinic for . protein were co present concentrations β is thrombin - ) 60 matrix reorganization, Tubulin . - ´ for localizes Bar modulating mean allowed and of minutes A defective . b p PAK 60 for 1 - - tubulin PAK (A) in Rho graphs Clinic for VascularClinic for ,Endovascular and Medical University Heine Heinrich of interest in the context of - against min, (APP) - was platelets Reelin and values Wildtype B evidence cell - protein Tail bleeding time (s) signaling B target to 1000 1200 were 200 400 600 800 no treatment treatment no fixed serving in depict 0 spread recombinant the to ( r ± eeler 1 rl measured and and Irena Krüger +/+ migration Protein : rest +CRP sem, and platelets 10 thrombus arterial supernatant mean F as on ) which platelet activation and outside co - stained rest for Aktin loading n= fibrinogen apolipoprotein - formation mechanisms that activation localizes values 1 3 PAK Reelin Reelin modulates PLCγ2 phosphorylation upon rl , were . at - / - (B) 5 indicated for . is 1 thrombosis and control 1 and / ´ Platelets 2 allowed . ± Moreover, Reelin Reelin . produced formation CRP ( in Graph to s 1 (A 15 the . lysates e mg/ml) F ) . (GP)Ib wt m (n= wt - minutes, Wildtype under time 2 subject subject of this presentation. . ´ ( to clone after 3 bars were and ) on fibrinogen represents panel) time Representative monitored 20 mesenteric control ( Wildtype represents for 1 and (black), distribution fluorescence formation platelet mesenteric bleeding arterial Figure adhere of . 1 . 20 and points . of is E 300 , Nina Platelets platelets 20 . % C 1 depict isolated G Rl ´ µg/mice) no lysed platelets compared 10 FeCl and +/+ sec Reelin to modified modified accordingGoggs to . by occlusion on was , 2 thrombosis instable mice After : red 5 - and 1 ´ 60 mean 3 irreversible sandwich and adhesion immobilized were one by time Rl merge F stimulated (n= Reelin were one and arterioles and arterioles ) - of Actin determined min, - were and and / + thrombin + - fluorescence were Rl 5 western individual Sarah Gowert to . pictures ) injection are thrombus 15 stimulated microscopy . r values - animal monitored eeler washed / irreversible (light ´ occlusion - (B) spreaded n for (A) IgG , Williams Williams , et stimulated and mice = injected ELISA protected F Tail without 3 were with with - - grey) human and occlusion ( actin After blots 5 . after 20 . (left al., Biochemical al., Biochemical Journal,2015 . mouse, (n= bleeding and formation * of Each Each Infectiology assay with thrombin . P< µg/mice wildtype 20 . injured microscopy 15 (dark in with (Rhodamin panel) were Shear 20 with DCF allowed % fibrinogen injury affecting occlusion thrombus - 0 17 CRP vivo against . Percent . n= 05 symbol symbol and CR FeCl ) Rest times . (right grey) . 3 ) was with rate and and . - ( the (C) ( 50 0 as by 60 of 10 3 to . = . , 2 - DOI: 10.3252/pso.eu.ISTH2017.2017 1 , Heinrich Heine University Medical Medical University Heine Heinrich , , Meike Klier , Deleted Deleted in the Mouse Mutant Reeler. Nature. 1995;374:719 (5) 1. 50 . The Journal of neuroscience : the official journal of the Society for Neuroscience. 1997;17(1):23 (4) 14772. signals through Apoer2 and Cdc42 to increase growth cone motility and filopodia formation. J Neurosci. 2010 Nov; 30 (44):1475 (3 Dec;12(12):2054 thrombin generation in Reelin (2) Tseng WL, Chen TH, Huang CC, Huang YH, Yeh CF, Tsai HJ, Lee HY, Kao CY, Lin SW, Liao HR, Cheng JC, Tseng CP. regulator of platelet spreading on fibrinogen. (1) Tseng WL, Huang CL, Chong KY, Liao CH, Stern A, Cheng JC, Tseng CP. promising Our platelets modulating Taken ) Leemhuis A D'Arcangelo D'Arcangelo G, Nakajima K,Miyata T, Ogawa M, Mikoshiba K,Curran T. is Reelin a secreted glycoprotein recognized by the CR starting 60 and Figure wt , reeler study phosphorylated with Figure 120 reeler Archangelo Archangelo GD, Miao GG, Chen S together Reeler 6 volume Reelin influencesstaticadhesionon CRP and binding toGPVI . and : CRP Reeler mice 8 therapeutic J, Bouché, E, Frotscher, M, Henle, F, Hein, L, Herz, J, Meyer, DK, Pichler, M, Roth, G, Schwan, C, Bock, HH. Reelin : reveals A 300 Intracellular outside Reelin isinfluencing - . ( 64. 5 Bar (grey) µg/ml) PRP minutes) Syk 1 these graphs A , plateletsshow reduced upon activation GPVIstimulation was shows Hans and - an for wt in wt . Reelin Reelin We thank Martina Spelleken for providing outstanding technical assistance. stimulated depict Syk target rest After cells per visual field - 2 100 150 200 250 300 350 signaling deficient deficient mice: a potential role of plasma in Reelin . 50 important data 0 impaired minutes, . 0.002 60 min 60 min 6 β min min 300 Thrombin is - mean Tubulin [U/ml] H. wt wt reeler modulating for 0.02 provide *** Poster minutes with Tuesday, July 11 r values r eeler clot eeler modulatesPLC Bock ISTH2017 lysed In vitro In 0.1 was - Center thrombin suggesting C, Soares C, Soares HD, Morgan JI, Curran T. A Protein Related to Extracellular role Cell Mol Cell Life Sci. 2010 Feb;67(4):641 presented retraction wt wt the serving ± *** and 1 ** PLC sem, first [ supernatant Acknowledgments µg/ml] - on for CRP Center 2 ( and 300 120 5 ** western 5 γ in signaling , Düsseldorf, Germany Düsseldorf, , * B , Current 2011 Targets, Drug modified accordingBigalke to : n 2 min min as min min U/ml) at ´ ´ ´ ´ Margitta Elvers thus evidence = phosphorylation Reelin + - - Integrin JAQ1 JAQ1 10 JAQ1 *** loading References Conclusion 5 in vivo vivo in * - 6 that - Methods r r in ADP 23. eeler , eeler Reelin blots , Düsseldorf, Germany Düsseldorf, , 10 ** fluid the P ADP/U46 control et et [µM] 10/3 10/3 ˂ in Reelin presence al was were analysis analysis of ., 0 enhances

. % starting Volume for 01 hemostasis 10 20 30 40 50 60 70 80 90 75 γ 0 (n= . . removed α upon 2 phosphorylation performed PAR [µM] 4 Reelin A 100 IIb ) of is - . 4 ** CaCl Integrin β Reelin is Reelin a platelet protein and functions as a positive GPVI rest a III and cells per visual field 100 120 140 160 180 200 20 40 60 80 Reeler 0 WT 2 modulator outside - against 53. ( stimulation mediating 20 its 1 -JAQ1 and α mM) CRP CRP IIb volume rest rest +Jaq1 d β wt *** III outside and phosphorylated mice arterial +JAQ1 Thromb Thromb Haemost. 2014 0 shown (MFI) mean sideward gated P minutes PAR ADP/U CRP thrombin with washed deficiency activation Figure . rest was , - photographed ( 01 A - for reeler . ) in signalingin , - ; signaling - 0 4 Wildtype ***P< in 300 measured for . 46 10 002 (n= by fluorescence min min signaling in PLC as 7 ; CRP twice thrombosis, each : . , characteristics 1 . the µM and 0 5 their , 0 Reduced sem Bar adhere platelets (JAQ and (B) CRP to Reeler GPVI CRP influencing Figure , ) indicated 001 and . . (A) PLC 5 02 Platelets presence platelets γ upon measurement * - - - - - ADP adhere after and 2 β Syk p PLC p Resting and and r , P< . 75 - - - eeler and graphs Tubulin Syk PLC 1 . forward . *** γ ) with matrix Blood through 2 g ( , phosphorylation platelets and 2 ; A) onto g 0 JON/A several - (A) P< 2 compared incubated 10 , and Matrix Proteins 10 100 0 05 intensity were PRP treated p 5 for were . for 1 of Reelin / : 0 wildtype latelet . , 3 GPVI µg/ml a . depict were binding U/ml 001 **P< anti ( Wildtype adhesion 20 PLC was The and - 1 thus Reelin µM µM PE from 15 were µg/ml), stimulated time - Reelin is 31. allowed . - min γ GPVI Impaired against 2 antibody mean platelets wt wildtype points allowed matrix onto being and (black) onto 9 n= and - on to 5 is the a ± ( and . . - 0 , in a