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Sökning: hsv:(MEDICIN OCH HÄLSOVETENSKAP) hsv:(Medicinsk bioteknologi) hsv:(Medicinsk bioteknologi med inriktning mot cellbiologi inklusive stamcellsbiologi molekylärbiologi mikrobiologi biokemi eller biofarmaci)

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  • Orru, Anna Maria, 1976-, et al. (författare)
  • AHA! festival 2015
  • 2015
  • Annan publikation (övrigt vetenskapligt)abstract
    • The AHA festival investigates the borders between art and science in a three-day event at the Chalmers University of Technology hosted by the Department of Architecture. An international festival intended to provide enlightening experiences, staging surprises, new thoughts and displaced perspectives that lead to alternative modes of thinking about the space between art and science. We invite scientists (physicists, historians, mathematicians, medical students), artists (dancers, musicians, painters, poets, chefs) and not least architects, who reside in these borderlands and wish to share their vision and work. The key intention is to celebrate both art and science as key knowledge building devices.
  • Munthe, Christian, 1962- (författare)
  • Will IVF ever be the norm?
  • 2014
  • Ingår i: Future of IVF - A Brave New World? ESHRE symposium, September 26-27, Stockholm.
  • Konferensbidrag (övrigt vetenskapligt)
  • Andersson, Sören, 1957-, et al. (författare)
  • Chimeric MOMP antigen
  • 2014
  • Patent (populärvet., debatt m.m.)abstract
    • The present invention regards polypeptides capable of eliciting an immunological response that is protective against Chlamydia trachomatis. The polypeptide comprises a first amino acid sequence which has at least 90% homology with the amino acid sequence according to SEQ ID NO: 1 and a second amino acid sequence which has at least 90% homology with the amino acid sequence according to SEQ ID NO: 2. Furthermore, production of these polypeptides and pharmaceutical compositions comprising them are also provided.
  • Andersson, Sören, 1957-, et al. (författare)
  • 2015
  • Patent (populärvet., debatt m.m.)
  • Campbell, Kate, 1987-, et al. (författare)
  • Self-Establishing Communities: A Yeast Model to Study the Physiological Impact of Metabolic Cooperation in Eukaryotic Cells
  • 2019
  • Ingår i: Methods in molecular biology (Clifton, N.J.). - 19406029. ; 2049, s. 263-282
  • Tidskriftsartikel (refereegranskat)abstract
    • All biosynthetically active cells are able to export and import metabolites, the small molecule intermediaries of metabolism. In dense cell populations, this hallmark of cells results in the intercellular exchange of a wide spectrum of metabolites. Such metabolite exchange enables metabolic specialization of individual cells, leading to far reaching biological implications, as a consequence of the intrinsic connection between metabolism and cell physiology. In this chapter, we discuss methods on how to study metabolite exchange interactions by using self-establishing metabolically cooperating communities (SeMeCos) in the budding yeast Saccharomyces cerevisiae. SeMeCos exploit the stochastic segregation of episomes to progressively increase the number of essential metabolic interdependencies in a community that grows out from an initially prototrophic cell. By coupling genotype to metabotype, SeMeCos allow for the tracking of cells while they specialize metabolically and hence the opportunity to study their progressive change in physiology.
  • Jesorka, Aldo, 1967-, et al. (författare)
  • Microfluidic technology for investigation of protein function in single adherent cells
  • 2019
  • Ingår i: Methods in Enzymology. - 978-012817090-8
  • Bokkapitel (övrigt vetenskapligt)abstract
    • Instrumental techniques and associated methods for single cell analysis, designed to investigate and measure a broad range of cellular parameters in search of unique features, address key limitations of conventional cell-based assays with their ensemble average response. While many different single cell techniques exist for suspension cultures, which can process and characterize large numbers of individual cells in rapid succession, the access to surface-immobilized cells in typical 2D and 3D culture environments remains challenging. Open space microfluidics has created new possibilities in this area, allowing for exclusive access to single cells in adherent cultures, even at high confluency. In this chapter, we briefly review new microtechnologies for the investigation of protein function in single adherent cells, and present an overview over related recent applications of the multifunctional pipette (Biopen), a microfluidic multi-solution dispensing system that uses hydrodynamic confinement in open volume environments in order to establish a superfusion zone over selected single cells in adherent cultures.
  • Khorshidi, Mohammad Ali, 1981- (författare)
  • Live Single Cell Imaging and Analysis Using Microfluidic Devices
  • 2013
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • Today many cell biological techniques study large cell populations where an average estimate of individual cells’ behavior is observed. On the other hand, single cell analysis is required for studying functional heterogeneities between cells within populations. This thesis presents work that combines the use of microfluidic devices, optical microscopy and automated image analysis to design various cell biological assays with single cell resolution including cell proliferation, clonal expansion, cell migration, cell-cell interaction and cell viability tracking. In fact, automated high throughput single cell techniques enable new studies in cell biology which are not possible with conventional techniques.In order to automatically track dynamic behavior of single cells, we developed a microwell based device as well as a droplet microfluidic platform. These high throughput microfluidic assays allow automated time-lapse imaging of encapsulated single cells in micro droplets or confined cells inside microwells. Algorithms for automatic quantification of cells in individual microwells and micro droplets are developed and used for the analysis of cell viability and clonal expansion. The automatic counting protocols include several image analysis steps, e.g. segmentation, feature extraction and classification. The automatic quantification results were evaluated by comparing with manual counting and revealed a high success rate. In combination these automatic cell counting protocols and our microfluidic platforms can provide statistical information to better understand behavior of cells at the individual level under various conditions or treatments in vitro exemplified by the analysis of function and regulation of immune cells. Thus, together these tools can be used for developing new cellular imaging assays with resolution at the single cell level.To automatically characterize transient migration behavior of natural killer (NK) cells compartmentalized in microwells, we developed a method for single cell tracking. Time-lapse imaging showed that the NK cells often exhibited periods of high motility, interrupted with periods of slow migration or complete arrest. These transient migration arrest periods (TMAPs) often overlapped with periods of conjugations between NK cells and target cells. Such conjugation periods sometimes led to cell-mediated killing of target cells. Analysis of cytotoxic response of NK cells revealed that a small sub-class of NK cells called serial killers was able to kill several target cells. In order to determine a starting time point for cell-cell interaction, a novel technique based on ultrasound was developed to aggregate NK and target cells into the center of the microwells. Therefore, these assays can be used to automatically and rapidly assess functional and migration behavior of cells to detect differences between health and disease or the influence of drugs.The work presented in this thesis gives good examples of how microfluidic devices combined with automated imaging and image analysis can be helpful to address cell biological questions where single cell resolution is necessary. 
  • Borzacchiello, A, et al. (författare)
  • Rheological characterization of vocal folds after injection augmentation in a preliminary animal study
  • 2004
  • Ingår i: Journal of bioactive and compatible polymers (Print). - London : Sage Publications. - 0883-9115. ; 19:4, s. 331-341
  • Tidskriftsartikel (refereegranskat)abstract
    • The investigation of vocal folds viscoelastic properties in an animal model (rabbit) after injection of various augmentation substances, 6 months after injection, is reported. The injected materials were: hyaluronan-based materials (Hylan B gel and Deflux(R)), cross-linked collagen (Zyplast(R)) and polytetrafluoroethylene (Teflon(R)). Rheological properties of the augmentation substances were also evaluated. The results from these animal experiments indicate that the viscoelastic properties of the vocal folds injected with Deflux(R), Zyplast(R) and Hylan B gel are similar to the healthy vocal folds (non-injected samples) used as control, thus demonstrating that these materials are good candidates for further studies aimed at restoring/preserving the vibratory capacity of the vocal folds with injection treatment in glottal insufficiency.
  • Garcia-Bennett, Alfonso, et al. (författare)
  • In vitro generation of motor neuron precursors from mouse embryonic stem cells using mesoporous nanoparticles
  • 2014
  • Ingår i: Nanomedicine. - 1743-5889 .- 1748-6963. ; 9:16, s. 2457-2466
  • Tidskriftsartikel (refereegranskat)abstract
    • Aim: Stem cell-derived motor neurons (MNs) are utilized to develop replacement strategies for spinal cord disorders. Differentiation of embryonic stem cells into MN precursors involves factors and their repeated administration. We investigated if delivery of factors loaded into mesoporous nanoparticles could be effective for stem cell differentiation in vitro.Materials & methods: We used a mouse embryonic stem cell line expressing green fluorescent protein under the promoter for the MN-specific gene Hb9 to visualize the level of MN differentiation. The differentiation of stem cells was evaluated by expression of MN-specific transcription factors monitored by quantitative real-time PCR reactions and immunocytochemistry.Results: Mesoporous nanoparticles have strong affiliation to the embryoid bodies, penetrate inside the embryoid bodies and come in contact with differentiating cells.Conclusion: Repeated administration of soluble factors into a culture medium can be avoided due to a sustained release effect using mesoporous silica.
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