transparent gif


Ej inloggad.

Göteborgs universitets publikationer

A microfluidic system in combination with optical tweezers for analyzing rapid and reversible cytological alterations in single cells upon environmental changes

Författare och institution:
Emma Eriksson (Institutionen för fysik (GU)); Jonas Enger (Institutionen för fysik (GU)); Bodil Nordlander (Institutionen för fysik (GU)); Nika Erjavec (Institutionen för fysik (GU)); Kerstin Ramser (Institutionen för fysik (GU)); Mattias Goksör (Institutionen för fysik (GU)); Stefan Hohmann (Institutionen för cell- och molekylärbiologi); Thomas Nyström (Institutionen för fysik (GU)); Dag Hanstorp (Institutionen för fysik (GU))
Publicerad i:
Lab on a chip, 7 ( 1 ) s. 71-76
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
We report on the development of an experimental platform where epi-fluorescence microscopy and optical tweezers are combined with a microfluidic system to enable the analysis of rapid cytological responses in single cells. The microfluidic system allows two different media to be merged in a Y-shaped channel. Microscale channel dimensions ensure purely laminar flow and, as a result, an environmental gradient can be created between the two media. Optical tweezers are used to move a single trapped cell repeatedly between the different environments. The cell is monitored continuously by fluorescence microscopy during the experiment. In a first experiment on yeast (Saccharomyces cerevisiae) we observed changes in cell volume as the cell was moved between environments with different osmolarity. This demonstrated that the platform allowed analysis of cytological alterations on a time scale shorter than 0.2 s. In a second experiment we observed the spatial migration of the Yap1p transcription factor fused to GFP as a cell was moved from an environment of low to high oxidative capacity. The system is universal allowing the response to numerous environmental changes to be studied on the sub second time scale in a variety of model cells. We intend to use the platform to study how the age of cells, their progression through the cell cycle, or their genetic landscape, alter their capacity (kinetics and amplitude) to respond to environmental changes.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper
Postens nummer:
Posten skapad:
2007-03-08 08:37
Posten ändrad:
2012-08-23 13:40

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007