YAMATO Masayuki
   Department   Research Institutes and Facilities, Research Institutes and Facilities
   Position   Professor
Article types Original article
Language English
Peer review Peer reviewed
Title An actuated pump on-chip powered by cultured cardiomyocytes.
Journal Formal name：Lab on a chip
Abbreviation：Lab Chip
ISSN code：(1473-0197)1473-0189(Linking)
Domestic / ForeginForegin
Publisher The Royal Sciety of Chemistry
Volume, Issue, Page 6(3),pp.362-368
Author and coauthor Tanaka Yo†, Morishima Keisuke, Shimizu Tatsuya, Kikuchi Akihiko, Yamato Masayuki, Okano Teruo, Kitamori Takehiko*
Publication date 2006/03
Summary Cellular functions are frequently exploited as processing components for integrated chemical systems such as biochemical reactors and bioassay systems. Here, we have created a new cell-based microsystem exploiting the intrinsic pulsatile mechanical functions of cardiomyocytes to build a cellular micropump on-chip using cardiomyocyte sheets as prototype bio-microactuators. We first demonstrate cell-based control of fluid motion in a model microchannel without check valves and evaluate the potential performance of the bio-actuation. For this purpose, a poly(dimethylsiloxane) (PDMS) microchip with a microchannel equipped with a diaphragm and a push-bar structure capable of harnessing collective cell fluid mechanical forces was coupled to a cultured pulsating cardiomyocyte sheet, activating cell-based fluid movement in the microchannel by actuating the diaphragm. Cell oscillation frequency and correlated fluid displacement in this system depended on temperature. When culture temperature was increased, collective cell contraction frequency remained cooperative and synchronous but increased, while displacement was slightly reduced. We then demonstrated directional fluid pumping within microchannels using cantilever-type micro-check valves made of polyimide. A directional flow rate of nL min(-1) was produced. This cell micropump system could be further developed as a self-actuated and efficient mechanochemical transducer requiring no external energy sources for various purposes in the future.
DOI 10.1039/b515149j
PMID 16511618