Name: live-cell imaging of platelet degranulation and secretion under flow
Uploaded: 2017-07-10T10:00:00
Description: Watch this Scientific Journal Video about Live-cell Imaging of Platelet Degranulation and Secretion Under Flow at JoVE.com

CM anerkjenner økonomisk støtte fra Den internasjonale pasientorganisasjonen for C1-Inhibitor Deficiencies (HAEi), Stichting Vrienden van Het UMC Utrecht og Landsteiner Foundation for Blood Transfusion Research (LSBR).

Den lokale medisinske etiske komiteen ved Universitetshospitalsenteret Utrecht godkjente tegning av blod for eks vivo forskningsformål, inkludert de i denne studien. 1. Løsningsberedning <ol><li> Forbered en 4- (2-hydroksyetyl) -1-piperazinetansulfonsyre (HEPES) Tyrodes buffer ved å oppløse 10 mM HEPES, 0,5 mM Na 2 HPO 4 , 145 mM NaCl, 5 mM KCl, 1 mM MgS04 og 5,55 mM D- Glukose i destillert vann. <ol><li> Lag to varianter av bufferen: set...

<ol>
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L., Flaumenhaft, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Platelet+granule+exocytosis:+a+comparison+with+chromaffin+cells.">Platelet granule exocytosis: a comparison with chromaffin cells.</a> Front Endocrinol (Lausanne). 4, 11 (2013).</li><li>May, B., Menkens, I., Westermann, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differential+release+of+serotonin+and+histamine+from+blood+platelets+of+the+rabbit+by+aliphatic+and+aromatic+amines.">Differential release of serotonin and histamine from blood platelets of the rabbit by aliphatic and aromatic amines.</a> Life Sci. 6 (19), 2079-2085 (1967).</li><li>Schmaier, A. H., Smith, P. M., Colman, R. 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G., Houdijk, W. P., Sixma, J. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+perfusion+chamber+developed+to+investigate+platelet+interaction+in+flowing+blood+with+human+vessel+wall+cells,+their+extracellular+matrix,+and+purified+components.">A perfusion chamber developed to investigate platelet interaction in flowing blood with human vessel wall cells, their extracellular matrix, and purified components.</a> J Lab Clin Med. 102 (4), 522-535 (1983).</li><li>Van Aelst, B., Feys, H. B., Devloo, R., Vandekerckhove, P., Compernolle, V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microfluidic+Flow+Chambers+Using+Reconstituted+Blood+to+Model+Hemostasis+and+Platelet+Transfusion+In+Vitro.">Microfluidic Flow Chambers Using Reconstituted Blood to Model Hemostasis and Platelet Transfusion In Vitro.</a> J Vis Exp. (109), (2016).</li><li>Nesbitt, W. S., Westein, E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+shear+gradient-dependent+platelet+aggregation+mechanism+drives+thrombus+formation.">A shear gradient-dependent platelet aggregation mechanism drives thrombus formation.</a> Nat Med. 15 (6), 665-673 (2009).</li><li>Mitchell, J. L., Lionikiene, A. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Polyphosphate+colocalizes+with+factor+XII+on+platelet-bound+fibrin+and+augments+its+plasminogen+activator+activity.">Polyphosphate colocalizes with factor XII on platelet-bound fibrin and augments its plasminogen activator activity.</a> Blood. 128 (24), 2834-2845 (2016).</li><li>Park, Y., Schoene, N., Harris, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mean+platelet+volume+as+an+indicator+of+platelet+activation:+methodological+issues.">Mean platelet volume as an indicator of platelet activation: methodological issues.</a> Platelets. 13 (5-6), 301-306 (2002).</li><li>Sixma, J. J., de Groot, P. G., van Zanten, H., IJsseldijk, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+new+perfusion+chamber+to+detect+platelet+adhesion+using+a+small+volume+of+blood.">A new perfusion chamber to detect platelet adhesion using a small volume of blood.</a> Thromb Res. 92, S43-S46 (1998).</li><li>Slack, S. M., Turitto, V. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Flow+chambers+and+their+standardization+for+use+in+studies+of+thrombosis.+On+behalf+of+the+Subcommittee+on+Rheology+of+the+Scientific+and+Standardization+Committee+of+the+ISTH.">Flow chambers and their standardization for use in studies of thrombosis. On behalf of the Subcommittee on Rheology of the Scientific and Standardization Committee of the ISTH.</a> Thromb Haemost. 72 (5), 777-781 (1994).</li><li>Oreopoulos, J., Berman, R., Browne, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spinning-disk+confocal+microscopy:+present+technology+and+future+trends.">Spinning-disk confocal microscopy: present technology and future trends.</a> Methods Cell Biol. 123, 153-175 (2014).</li><li>Nishibori, M., Cham, B., McNicol, A., Shalev, A., Jain, N., Gerrard, J. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+protein+CD63+is+in+platelet+dense+granules,+is+deficient+in+a+patient+with+Hermansky-Pudlak+syndrome,+and+appears+identical+to+granulophysin.">The protein CD63 is in platelet dense granules, is deficient in a patient with Hermansky-Pudlak syndrome, and appears identical to granulophysin.</a> J. Clin. Invest. 91 (4), 1775-1782 (1993).</li><li>Ruiz, F. A., Lea, C. R., Oldfield, E., Docampo, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+platelet+dense+granules+contain+polyphosphate+and+are+similar+to+acidocalcisomes+of+bacteria+and+unicellular+eukaryotes.">Human platelet dense granules contain polyphosphate and are similar to acidocalcisomes of bacteria and unicellular eukaryotes.</a> J. Biol. Chem. 279 (43), 44250-44257 (2004).</li><li>Tersteeg, C., Fijnheer, R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Keeping+von+Willebrand+Factor+under+Control:+Alternatives+for+ADAMTS13.">Keeping von Willebrand Factor under Control: Alternatives for ADAMTS13.</a> Semin Thromb Hemost. 42 (1), 9-17 (2016).</li><li>Tersteeg, C., de Maat, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Plasmin+cleavage+of+von+Willebrand+factor+as+an+emergency+bypass+for+ADAMTS13+deficiency+in+thrombotic+microangiopathy.">Plasmin cleavage of von Willebrand factor as an emergency bypass for ADAMTS13 deficiency in thrombotic microangiopathy.</a> Circulation. 129 (12), 1320-1331 (2014).</li><li>Basir, A., de Groot, P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+Vitro+Hemocompatibility+Testing+of+Dyneema+Purity+Fibers+in+Blood+Contact.">In Vitro Hemocompatibility Testing of Dyneema Purity Fibers in Blood Contact.</a> Innovations (Phila). 10 (3), 195-201 (2015).</li></ol>

Globalt er trombose en ledende dødsårsak og sykelighet, og blodplater spiller en sentral rolle i utviklingen. Dette arbeidet beskriver en metode for levende celledannelse av blodplate-degranulering under strømning. Det antas generelt at når blodplater blir aktivert, slippes alt granulært innhold direkte inn i løsningen. De medfølgende resultatene tyder på at dette ikke nødvendigvis er tilfelle. Under vedheft og degranulasjon beholder blodplater en signifikant mengde polyfosfat ( figur 4 ). I ti...

Blodplater er anukleatceller som sirkulerer i blodstrømmen. Deres hovedfunksjon er å forsegle vaskulære brudd på steder av skade og for å forhindre blodtap. På disse steder av skade blir subendoteliale kollagenfibre eksponert og dekkes deretter av det multimere proteinet, von Willebrand-faktor (VWF). VWF interagerer med blodplater i omløp i en mekanisme som avhenger av glykoprotein Ibα-IX-V-komplekset på celleoverflaten 1 , og senker hastigheten på blodplater. Dette er spesielt viktig ved høy skjærhastighet. Plättene gjennomgår etterfølgende morfologiske endringer mens de mottar aktiveringsimpulser fra kollagen. Dette fører til irreversibel spredning og til slutt til blodplateaggregering. Begge prosessene er avhengige av sekretjonen av granulinnhold for å lette blodplate-blodplate-kronestikk. Blant annet inneholder blodplate-a-granuler fibrinogen og VWF for å hjelpe trombocytadhesjon og å broBlodplater sammen på en integrin-avhengig måte. De blodplate-tette granulatene inneholder uorganiske forbindelser 2 , inkludert kalsium og adenosindifosfat (ADP), som bidrar til å forsterke blodplateaktivering. Videre inneholder blodplater mediatorer av (allergisk) betennelse 3 , komplementkontrollerende proteiner 4 og angiogenesefaktorer 5 , 6 , som løfter spørsmål om hvorvidt og hvordan disse innholdene blir differensielt frigjort under varierende betingelser. Siden 1980-tallet har studien av blodplatefunksjon i flytmodeller vært verdifull for undersøkelsen av trombotiske mekanismer 7 . Siden da har det blitt gjort mye teknisk fremgang, og strømningsmodeller som inkluderer fibrindannelse, er for tiden utviklet for å analysere det hemostatiske potensialet av terapeutiske blodplatekoncentrater ex vivo 8 eller tilUndersøke påvirkning av forstyrrelser i skjærhastigheter på trombusmorfologi 9 . Forskjellene i molekylære og cellebiologiske mekanismer som driver stabil vedheft og fysiologisk trombusdannelse (hemostase) versus patologisk trombusdannelse (trombose) kan være svært subtile og motivere utviklingen av strømningsmodeller som gjør det mulig for real-time visualisering av disse subcellulære prosesser. Et eksempel på en prosess som et slikt oppsett ville være verdifullt er (re) fordeling av intracellulært polyfosfat og rekruttering av koagulasjonsfaktorer for å avdekke den tidsavhengige påvirkning som dette har på fibrin-ultrastruktur 10 . Studier er ofte begrenset til endepunktsanalyser. Hovedformålet med den beskrevne metoden er å muliggjøre sanntidsvisuell undersøkelse av dynamiske subcellulære prosesser som finner sted under blodplateaktivering under strømning.

<table border="0" cellpadding="0" cellspacing="0" width="1340">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES)&#160;</td>
			<td style="width:295px;">VWR</td>
			<td style="width:227px;">441476L</td>
			<td style="width:372px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Na2HPO4</td>
			<td style="width:295px;">Sigma</td>
			<td style="width:227px;">S-0876</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">NaCl</td>
			<td style="width:295px;">Sigma</td>
			<td style="width:227px;">31434</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">KCl</td>
			<td style="width:295px;">Sigma</td>
			<td style="width:227px;">31248</td>
			<td></td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;">MgSO4</td>
			<td style="width:295px;">Merck KGaA</td>
			<td style="width:227px;">1.05886</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">D-glucose</td>
			<td style="width:295px;">Merck KGaA</td>
			<td style="width:227px;">1.04074</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Prostacyclin&#160;</td>
			<td style="width:295px;">Cayman Chemical</td>
			<td style="width:227px;">18220</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Tri-sodium citrate</td>
			<td style="width:295px;">Merck KGaA</td>
			<td style="width:227px;">1.06448</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Citric acid&#160;</td>
			<td style="width:295px;">Merck KGaA</td>
			<td style="width:227px;">1.00244</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Cover glasses</td>
			<td style="width:295px;">Menzel-Gl&#228;ser</td>
			<td style="width:227px;">BBAD02400500#A</td>
			<td>24x50mm, No. 1 = 0.13-0.16 mm thickness.</td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:447px;">Chromosulfuric acid (2% CrO3)</td>
			<td style="width:295px;">Riedel de Haen</td>
			<td>07404</td>
			<td>CAS [65272-70-0].</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Von Willebrand factor (VWF)</td>
			<td style="width:295px;">in-house purified</td>
			<td style="width:227px;"></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Fibrinogen</td>
			<td style="width:295px;">Enzyme Research Laboratories</td>
			<td style="width:227px;">FIB3L</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">4 well dish, non-treated</td>
			<td style="width:295px;">Thermo Scientific</td>
			<td style="width:227px;">267061</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Human Serum Albumin Fraction V</td>
			<td style="width:295px;">Haem Technologies Inc.</td>
			<td style="width:227px;">823022</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Blood collection tubes, 9 ml, 9NC Coagulation Sodium Citrate 3.2%</td>
			<td style="width:295px;">Greiner Bio-One</td>
			<td style="width:227px;">455322</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Cell analyser&#160;</td>
			<td style="width:295px;">Abbott Diagnostics</td>
			<td style="width:227px;">CELL-DYN hematology analyzer</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Paraformaldehyde</td>
			<td style="width:295px;">Sigma</td>
			<td>30525-89-4&#160;</td>
			<td></td>
		</tr>
		<tr height="19">
			<td height="19" style="height:19px;">Syringe pump</td>
			<td style="width:295px;">Harvard Apparatus, Holliston, MA</td>
			<td style="width:227px;">Harvard apparatus 22</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">10 mL syringe with 14.5 mm diameter</td>
			<td style="width:295px;">BD biosciences</td>
			<td style="width:227px;">305959</td>
			<td>Luer-Lok syringe</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Anti-CD63-biotin&#160;</td>
			<td style="width:295px;">Abcam&#160;</td>
			<td style="width:227px;">AB134331</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Anti-CD62P-biotin&#160;</td>
			<td style="width:295px;">R&#38;D Systems</td>
			<td style="width:227px;">Dy137</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">4&#8217;,6-Diamidino-2-phenylindole dihydrochloride (DAPI)</td>
			<td style="width:295px;">Polysciences Inc.&#160;</td>
			<td style="width:227px;">9224</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Streptavidin, Alexa Fluor 488 conjugate</td>
			<td>Thermo Scientific</td>
			<td>S11223&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Immersion oil</td>
			<td>Zeiss</td>
			<td>444963-0000-000</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Detergent solution</td>
			<td>Unilever, Biotex</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Glycine</td>
			<td>Sigma</td>
			<td>56-40-6&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Polyvinyl alcohol</td>
			<td style="width:295px;">Sigma</td>
			<td>9002-89-5</td>
			<td>Mowiol 40-88.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Tris hydrochloride</td>
			<td style="width:295px;">Sigma</td>
			<td>1185-53-1&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">1,4-Diazabicyclo[2.2.2]octane (DABCO)</td>
			<td style="width:295px;">Sigma</td>
			<td>280-57-9</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Sheep Anti-hVWF pAb</td>
			<td>Abcam&#160;</td>
			<td style="width:227px;">AB9378</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Alexa fluor 488-NHS</td>
			<td style="width:295px;">Thermo Scientific</td>
			<td style="width:227px;">A20000</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Glycerol</td>
			<td style="width:295px;">Sigma-Aldrich</td>
			<td style="width:227px;">15523-1L-R</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Parafinn film</td>
			<td style="width:295px;">Bemis</td>
			<td style="width:227px;">PM-996</td>
			<td>4 in. x 125 ft. Roll.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Silicone sheet non-reinforced</td>
			<td style="width:295px;">Nagor</td>
			<td style="width:227px;">NA 500-1</td>
			<td>200mmx150mmx0.125mm.</td>
		</tr>
		<tr height="19">
			<td height="19" style="height:19px;width:447px;">Customized cut silicone sheet with perfusion and vacuum channels</td>
			<td style="width:295px;">in-house made</td>
			<td style="width:227px;"></td>
			<td>Made of Silicone sheet non-reinforced (Nagor, NA 500-1)</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">1.5 mL tubes</td>
			<td style="width:295px;">Eppendorf AG</td>
			<td style="width:227px;">T9661-1000AE</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Fluorescent microscope</td>
			<td style="width:295px;">Zeiss Observer Z1&#160;</td>
			<td style="width:227px;"></td>
			<td>Equiped with LED excitation lights.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Microscope software</td>
			<td style="width:295px;">Zeiss ZEN 2</td>
			<td style="width:227px;">blue edition</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">18 G needle (18 G x 1 1/2&#34;)</td>
			<td style="width:295px;">BD biosciences</td>
			<td>305196</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">NaCl</td>
			<td style="width:295px;">Riedel de Haen</td>
			<td style="width:227px;">31248375</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Tris</td>
			<td style="width:295px;">Roche</td>
			<td style="width:227px;">10708976</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Plastic pasteur pipet</td>
			<td style="width:295px;">VWR</td>
			<td style="width:227px;">612-1681</td>
			<td>&#160;7 ml non sterile, graduated up to 3ml.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Silicone tubing</td>
			<td style="width:295px;">VWR</td>
			<td style="width:227px;">228-0656</td>
			<td>Inner diamete. x Outer diameter x Wall thickness = 1.02 x 2.16 x 0.57 mm.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:447px;">Microscope slides</td>
			<td style="width:295px;">Thermo Scientific</td>
			<td style="width:227px;">ABAA000001##12E</td>
			<td>76 x 26 x 1 mm, ground edges 45&#176;, frosted end.</td>
		</tr>
	</tbody>
</table>

live-cell imaging of platelet degranulation and secretion under flow

Blodplater er viktige spillere i hemostase, dannelsen av trombier for å forsegle vaskulære brudd. De er også involvert i trombose, dannelsen av trombi som okkluderer vaskulaturen og skadet organer, med livstruende konsekvenser. Dette motiverer vitenskapelig forskning på blodplatefunksjon og utvikling av metoder for å spore cellebiologiske prosesser som de oppstår under flytforhold. En rekke strømningsmodeller er tilgjengelige for studier av trombocytadhesjon og aggregering, to sentrale fenomener i blodplatebiologi. Dette arbeidet beskriver en metode for å studere sanntids blodplante degranulasjon under flyt under aktivering. Metoden gjør bruk av et strømningskammer koblet til en sprøytepumpeoppsett som er plassert under et brede, invertert, LED-basert fluorescensmikroskop. Oppsettet beskrevet her muliggjør samtidig eksitering av flere fluoroforer som leveres av fluorescensmerkede antistoffer eller fluorescensEnt farger. Etter eksponering av levende celler, kan dekslet briller behandles videre og analyseres ved hjelp av statisk mikroskopi ( dvs. konfokal mikroskopi eller skanning elektronmikroskopi).

Figur 1 viser bilder av strømningskammeret og eksperimentelt oppsett; Plasseringen og dimensjonene av silisiumplaten; Og rørforbindelser. Figur 2 gir detaljer om dimensjonene til strømningskammeret. Figur 3 og Film 1 viser en tidsserie av bilder av vedheft av blodplater og spredning på immobilisert VWF. CD63 er et transmembranprotein som settes inn i membranen av intracellulære...

Watch this Scientific Journal Video about Live-cell Imaging of Platelet Degranulation and Secretion Under Flow at JoVE.com

Live-cell Imaging of Platelet Degranulation and Secretion Under Flow

Dette arbeidet beskriver en fluorescensmikroskopibasert metode for studier av trombocytadhesjon, spredning og sekresjon under strømning. Denne allsidige plattformen muliggjør undersøkelse av blodplatefunksjon for mekanistisk forskning på trombose og hemostase.

Levende celle-bildebehandling av blodplategradering og sekresjon under strømning

Blood platelets are essential players in hemostasis, the formation of thrombi to seal vascular breaches. They are also involved in thrombosis, the ...

Research

JoVE Journal

Biology

Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells

Platelet aggregation occurs in response to vascular injury where the extracellular matrix below the endothelium has been exposed. The platelet adhesion ...

Live-cell Imaging and Quantitative Analysis of Embryonic Epithelial Cells in Xenopus laevis

Live-cell Imaging and Quantitative Analysis of Embryonic Epithelial Cells in Xenopus laevis

Embryonic epithelial cells serve as an ideal model to study morphogenesis where multi-cellular tissues undergo changes in their geometry, such as changes ...

Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins

To-og tre-dimensjonale Live-Cell Imaging av DNA Damage Response Proteiner

Double-strand breaks (DSBs) are the most deleterious DNA lesions a cell can encounter. If left unrepaired, DSBs harbor great potential to generate ...

Live Cell Imaging of Early Autophagy Events: Omegasomes and Beyond

Leve Cell Imaging av Early Autophagy Events: Omegasomes and Beyond

Autophagy is a  cellular response triggered by the lack of nutrients, especially the absence of  amino acids. Autophagy is defined by the formation of ...

Studying the Protein Quality Control System of D. discoideum Using Temperature-controlled Live Cell Imaging

Studying the Protein Quality Control System of D. discoideum Using Temperature-controlled Live Cell Imaging

Studerer Protein Quality Control System of<em&gt; D. discoideum</em&gt; Bruke Temperaturstyrt Live-Cell Imaging

The complex lifestyle of the social amoebae Dictyostelium discoideum makes it a valuable model for the study of various biological processes. Recently, we ...

Mixed Primary Cultures of Murine Small Intestine Intended for the Study of Gut Hormone Secretion and Live Cell Imaging of Enteroendocrine Cells

Blandede primærkulturer av Murine tynntarmen Beregnet for studier av Gut hormon og Live Cell Imaging av Enteroendocrine Cells

The gut is the largest endocrine organ of the body, with hormone-secreting enteroendocrine cells located along the length of the gastrointestinal ...

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

LDL Kolesterol opptaksanalyse bruke levende celle Imaging analyse med cellen helseovervåking

The regulation of LDL cholesterol uptake through LDLR-mediated endocytosis is an important area of study in various major pathologies including metabolic ...

Application of Membrane and Cell Wall Selective Fluorescent Dyes for Live-Cell Imaging of Filamentous Fungi

Anvendelse av membran og Cell Wall selektiv fluorescerende fargestoffer for Live-Cell Imaging av trådformede sopp

The application of membrane and cell wall selective fluorescent dyes for live-cell imaging analyses of organelle dynamics in fungal cells started two ...

Super-Resolution Live Cell Imaging of Subcellular Structures

Superoppløsning live celleavbildning av subcellulære strukturer

There has long been a crucial tradeoff between spatial and temporal resolution in imaging. Imaging beyond the diffraction limit of light has traditionally ...