Imaging the Cytoskeleton of Migratory Cells

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dc.contributorRice, Marian
dc.contributorJarvinen, Lamis
dc.contributor.advisorFink, Rachel
dc.contributor.authorBaccei, Anna
dc.date.accessioned2011-05-16T17:55:51Z
dc.date.available2011-05-16T17:55:51Z
dc.date.gradyear2011en_US
dc.date.issued2011-05-16
dc.descriptionThe two multimedia files (time-lapse movies of migrating cells) were submitted electronically along with the digital copy of the thesis itself. Anyone who views the paper copy will need to request a copy of the movie files, as they are important for understanding the work.en_US
dc.description.abstractCell migration is a complex and important process by which cells move along a surface or within a three-dimensional matrix. The mechanics of motility involve cytoskeletal rearrangement, membrane dynamics, and cell-substrate interactions. This investigation focuses on the morphologies, internal structures, and in vitro behavior of five migratory cell types using an array of microscopic techniques. Killifish keratocytes, HeLa cells, mouse bone-derived stem cells, mouse fibroblasts, and MDCK cells represent a diverse sampling of vertebrates and tissue sources; these cells were studied with brightfield, phase/contrast, fluorescence, and both scanning and transmission electron microscopy. Keratocytes were plated on glass coverslips for phase/contrast time-lapse microscopy in order to create movies of migration. These cells, as well as HeLa cells, were also fixed with formaldehyde, extracted, and stained with a fluorophore that binds to actin in order to view the actin cytoskeleton. Keratocytes, HeLa cells, stem cells, and mouse fibroblasts were plated and fixed for scanning electron microscopy in order to examine external morphology and surface details. In one of these SEM experiments, the HeLa cells were extracted with detergent prior to fixation to remove the plasma membrane. Flat-embedded, thin-sectioned MDCK cells were imaged under transmission electron microscopy to reveal internal details at high magnifications. The resulting images show both continuities and variability between the different cell types in this study. The results also highlight the importance of cellular imaging; both the process and the findings are applicable to cell motility research of all kinds, from in vitro studies to in vivo medical experiments. Ultimately, viewing the cytoskeleton and the larger structures it shapes helps elicit a conceptual understanding of cell migration.en_US
dc.description.sponsorshipBiological Sciencesen_US
dc.identifier.urihttp://hdl.handle.net/10166/856
dc.language.isoen_USen_US
dc.rightsAttribution-NoDerivs 3.0 Unported
dc.rights.restrictedpublic
dc.rights.urihttp://creativecommons.org/licenses/by-nd/3.0/
dc.subjectcell migrationen_US
dc.subjectmicroscopyen_US
dc.subjectcytoskeletonen_US
dc.subjectkeratocyteen_US
dc.subjectHeLaen_US
dc.subjectstem cellen_US
dc.subjectfibroblasten_US
dc.subjectMDCKen_US
dc.titleImaging the Cytoskeleton of Migratory Cellsen_US
dc.typeThesisen_US
mhc.degreeUndergraduateen_US
mhc.institutionMount Holyoke College

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