0000000000699600

AUTHOR

Moona Lehkonen

showing 3 related works from this author

Echovirus 1 infection depends on biogenesis of novel multivesicular bodies

2011

Summary Non-enveloped picornavirus echovirus 1 (EV1) clusters its receptor α2β1 integrin and causes their internalization and accumulation in α2β1 integrin enriched multivesicular bodies (α2-MVBs). Our results here show that these α2-MVBs are distinct from acidic late endosomes/lysosomes by several criteria: (i) live intra-endosomal pH measurements show that α2-MVBs are not acidic, (ii) they are not positive for the late endosomal marker LBPA or Dil-LDL internalized to lysosomes, and (iii) simultaneous stimulation of epidermal growth factor receptor (EGFR) and α2β1 integrin clustering leads to their accumulation in separate endosomes. EGFR showed downregulation between 15 min and 2 h, where…

0303 health sciencesbiologyEndosomemedia_common.quotation_subject030302 biochemistry & molecular biologyImmunologyIntegrinmacromolecular substancesMicrobiology3. Good healthCell biology03 medical and health sciencesDownregulation and upregulationVirologybiology.proteinTSG101Epidermal growth factor receptorReceptorInternalizationBiogenesis030304 developmental biologymedia_commonCellular Microbiology
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Calpains promote α2β1 integrin turnover in nonrecycling integrin pathway

2012

A novel virus- and integrin clustering–specific pathway diverts integrin from its normal endo/exocytic traffic to a nonrecycling degradative endosomal route. Clustering of α2β1 integrin causes redistribution of the integrin to perinuclear endosomes, leading to enhanced integrin turnover promoted by calpains.

EndosomeIntegrinCD18Medical and Health SciencesCD49cCell LineCollagen receptorFocal adhesion03 medical and health sciencesCell Line TumorHumansMolecular Biology030304 developmental biology0303 health sciencesFocal AdhesionsTumorbiologyCalpain030302 biochemistry & molecular biologyCell MembraneCell BiologyArticlesBiological Sciences3. Good healthCell biologyEnterovirus B HumanProtein TransportIntegrin alpha MMembrane Traffickingbiology.proteinIntegrin beta 6Enterovirus BIntegrin alpha2beta1HumanDevelopmental BiologySignal TransductionMolecular Biology of the Cell
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Kasvutekijöiden merkitys α2β1-integriinin ja echovirus 1:n endosytoosissa

2011

Solu ottaa sisäänsä materiaalia endosytoosin avulla. Koska soluun kuljetettavien molekyylien kirjo on laaja, soluun on kehittynyt erilaisia endosytoosireittejä. Fagosytoosin avulla soluun kuljetetaan suuria kiinteitä partikkeleita. Pinosytoosireittejä on useita, ja niiden avulla solu ottaa sisäänsä solukalvoa ja solun ulkopuolista nestettä sekä siihen liuenneita molekyylejä. Kasvutekijäreseptorit ovat solukalvon lävistäviä reseptorityrosiinikinaaseja. Kasvutekijän sitoutuminen reseptoriinsa saa aikaan reseptorien kasaantumisen, signalointikompleksien muodostumisen sekä reseptorin endosytoitumisen. Muodostuneet signalointikompleksit aloittavat soluissa viestiketjuja, jotka lopulta johtavat m…

integriinitα2β1-integriiniechoviruksetkasvutekijäreseptoriendosytoosi
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