Detailed proteomic analysis of biomolecule samples such as serum or cell extract could provide valuable information regarding the person's health or biological cells under study. However, current sample preparation technologies cannot deal with the diversity and dynamic range of these biomolecule samples effectively, and therefore the detection of information-rich minority protein species (signaling molecules and cytokines) is severely limited. Efficient protein separation in microfluidic systems could provide a solution for this challenge, but the limitation in sample volume, as well as the lack of molecular signal amplification strategy, has been major issues. Recent advances in nanofluidics provide useful tools for proteomic sample preparation, to address these challenges. Nanofluidic filters could be used for a gel-free separation of proteins based on the size. Permselective ion current generated by the nanofluidic channel was used to concentrate proteins and peptides from a dilute solution, to increase the sample volume capacity of the microfluidic sample preparation system. Also, continuous-flow pI-based biomolecule sorting system was demonstrated. In this project, we will develop these nanofluidic components further, and integrate them into an automatic proteomic sample preparation system that could sort out complex biomolecule sample based on the property of the target molecule. The flexibility and robustness of the micro/nanofluidic sample preparation devices that will be developed from this project will facilitate the system integration greatly. The resulting sample preparation microdevices could be easily integrated with various types of detectors, including antibody-based biosensor or mass spectrometry. Such an integration will enhance the selectivity and sensitivity of the biodetection by orders of magnitudes, therefore impacting various fields such as human health monitoring, biomarker detection, and systems biology.

Agency
National Institute of Health (NIH)
Institute
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Type
Research Project (R01)
Project #
1R01EB005743-01
Application #
7024144
Study Section
Special Emphasis Panel (ZRG1-BCMB-A (50))
Program Officer
Korte, Brenda
Project Start
2005-09-15
Project End
2009-06-30
Budget Start
2005-09-15
Budget End
2006-06-30
Support Year
1
Fiscal Year
2005
Total Cost
$307,560
Indirect Cost
Name
Massachusetts Institute of Technology
Department
Type
Organized Research Units
DUNS #
001425594
City
Cambridge
State
MA
Country
United States
Zip Code
02139
Ko, Sung Hee; Kim, Sung Jae; Cheow, Lih Feng et al. (2011) Massively parallel concentration device for multiplexed immunoassays. Lab Chip 11:1351-8
Kim, Pilnam; Kim, Sung Jae; Han, Jongyoon et al. (2010) Stabilization of ion concentration polarization using a heterogeneous nanoporous junction. Nano Lett 10:16-23
Kim, Sung Jae; Song, Yong-Ak; Han, Jongyoon (2010) Nanofluidic concentration devices for biomolecules utilizing ion concentration polarization: theory, fabrication, and applications. Chem Soc Rev 39:912-22
Liu, Vincent; Song, Yong-Ak; Han, Jongyoon (2010) Capillary-valve-based fabrication of ion-selective membrane junction for electrokinetic sample preconcentration in PDMS chip. Lab Chip 10:1485-90
Cheow, Lih Feng; Ko, Sung Hee; Kim, Sung Jae et al. (2010) Increasing the sensitivity of enzyme-linked immunosorbent assay using multiplexed electrokinetic concentrator. Anal Chem 82:3383-8
Yamada, Masumi; Mao, Pan; Fu, Jianping et al. (2009) Rapid quantification of disease-marker proteins using continuous-flow immunoseparation in a nanosieve fluidic device. Anal Chem 81:7067-74
Fu, Jianping; Mao, Pan; Han, Jongyoon (2009) Continuous-flow bioseparation using microfabricated anisotropic nanofluidic sieving structures. Nat Protoc 4:1681-98
Kim, Sung Jae; Li, Leon D; Han, Jongyoon (2009) Amplified electrokinetic response by concentration polarization near nanofluidic channel. Langmuir 25:7759-65
Lee, Jeong Hoon; Cosgrove, Benjamin D; Lauffenburger, Douglas A et al. (2009) Microfluidic concentration-enhanced cellular kinase activity assay. J Am Chem Soc 131:10340-1
Mao, Pan; Han, Jongyoon (2009) Massively-parallel ultra-high-aspect-ratio nanochannels as mesoporous membranes. Lab Chip 9:586-91

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