Non-centrosomal MTs play a crucial role in organization of MT array in interphase fibroblasts

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dc.contributor.authorZvorykina, Yekaterina
dc.contributor.authorTvorogova, Anna
dc.contributor.authorGladkikh, Aleena
dc.contributor.authorVorobyev, Ivan
dc.date.accessioned2020-03-27T09:00:04Z
dc.date.available2020-03-27T09:00:04Z
dc.date.issued2018
dc.descriptionhttp://www.aimspress.com/article/10.3934/genet.2018.2.141en_US
dc.description.abstractMicrotubules in interphase fibroblast-like cells are thought to be organized in a radial array growing from a centrosome-based microtubule-organizing center (MTOC) to the cell edges. However, many morphogenetic processes require the asymmetry of the microtubules (MT) array. One of the possible mechanisms of this asymmetry could be the presence of non-centrosomal microtubules in different intracellular areas. To evaluate the role of centrosome-born and non-centrosomal microtubules in the organization of microtubule array in motile 3T3 fibroblasts, we have performed the high-throughput analysis of microtubule growth in different functional zones of the cell and distinguished three subpopulations of growing microtubules (centrosome-born, marginal and inner cytoplasmic). Centrosome as an active microtubule-organizing center was absent in half of the cell population. However, these cells do not show any difference in microtubule growth pattern. In cells with active centrosome, it was constantly forming short (ephemeral) MTs, and ~15–20 MT per minute grow outwards for a distance >1 µm. Almost no persistent growth of microtubules was observed in these cells with the average growth length of 5–6 µm and duration of growth periods within 30 s. However, the number of growing ends increased towards cell margin, especially towards the active edges. We found the peripheral cytoplasmic foci of microtubule growth there. During recovery from nocodazole treatment microtubules started to grow around the centrosome in a normal way and independently in all the cell areas. Within 5 minutes microtubules continued to grow mainly near the cell edge. Thus, our data confirm the negligible role of centrosome as MTOC in 3T3 fibroblasts and propose a model of non-centrosomal microtubules as major players that create the cell asymmetry in the cells with a mesenchymal type of motility. We suggest that increased density of dynamic microtubules near the active lamellum could be supported by microtubule-based microtubule nucleation.en_US
dc.identifier.citationZvorykina, Y., Tvorogova, A., Gladkikh, A., & Vorobjev, I. (2018). Non-centrosomal MTs play a crucial role in organization of MT array in interphase fibroblasts. AIMS Genetics, 5(2), 141–160. https://doi.org/10.3934/genet.2018.2.141en_US
dc.identifier.issn2377-1143
dc.identifier.other10.3934/genet.2018.2.141
dc.identifier.urihttps://www.aimspress.com/fileOther/PDF/Genetics/genetics-05-02-141%20.pdf
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/4555
dc.language.isoenen_US
dc.publisherAIMS Pressen_US
dc.relation.ispartofseriesAIMS Genetics;
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectcytoskeletonen_US
dc.subjectcentrosomeen_US
dc.subjectmicrotubule dynamicsen_US
dc.subjectnon-centrosomal microtubulesen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES::Biologyen_US
dc.titleNon-centrosomal MTs play a crucial role in organization of MT array in interphase fibroblastsen_US
dc.typeArticleen_US
workflow.import.sourcescience

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