Journal
ACS SENSORS
Volume 1, Issue 4, Pages 344-347Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.5b00221
Keywords
mass spectrometry; microfluidics; lactate efflux; paper spray ionization; microdroplets
Funding
- National Natural Science Foundation of China [21227006, 21435002]
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An online multichannel microfluidic chip-mass spectrometry (MS) platform was developed for cell metabolism studies. Paper-spray ionization was employed for microsampling from different microchannels and, at the same time, the interface for direct MS analysis without any sample pretreatment. Near-real-time MS sensing of lactate in different microfluidic channels could be achieved in a preprogrammed and automatic manner. Influences of hypoxia on lactate efflux from normal cells and cancer cells, as well as the differential inhibitory effects and dose-response information on alpha-cyano-4-hydroxycinnamate on cancer cells of different types were exhibited. The potential of further coupling MS, complementary to optical and electrochemical techniques, to microfluidic devices for cell studies was thus demonstrated.
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