BME Seminar Series: Yu Sun, PhD, Professor, Canada Research Chair in Micro and Nano Eng, University of Toronto

Dr. Sun will present "Physical Manipulation and Characterization of Cells from Clinical Samples"

Physical Manipulation and Characterization of Cells from Clinical Samples

Advances in biology and medicine require enabling techniques for manipulating and characterizing cells and sub-cellular structures. Robotic cell surgery and automated biophysical characterization of cells enable new frontiers in science and have tangible clinical relevance. Precise extraction of chromatins and sub-cellular organelles is poised to revolutionize genomics and proteomics. Robotic deposition of foreign materials into cells is enabling new drug efficacy tests for the pharmaceutical industry. Biophysical characterization of cells has revealed increasing relevance of cells’ electrical and mechanical properties for predicting disease states. However, due to the small sizes of these objects and to their heterogeneity in a clinical sample, automated manipulation and characterization of single cells at a high speed is challenging.

In this talk, I will first introduce our robotic cell manipulation technologies. Hardware platforms and techniques such as cell immobilization, vision-based contact detection, visual servo control, and mechanical characterization of cells will be presented. Example work with collaborating hospitals on robotic manipulation of sperm, oocytes, and urine cells will be discussed. System performance and applications to molecule testing, clinical cell surgery, and bladder cancer detection will be highlighted. I will then introduce biophysical characterization of blood cells from patients. Compared to oocytes and urine cells, the number of blood cells for testing can be overwhelming. I will present our recently developed technologies for quantifying multiple electrical and mechanical parameters of individual blood cells orders of magnitude faster than conventional approaches. New findings on property changes of banked blood cells over blood storage will be presented. 

Biography:

Yu Sun is a Professor in the Dept. of Mechanical and Industrial Engineering, with joint appointments in the Institute of Biomaterials and Biomedical Engineering and the Department of Electrical and Computer Engineering at the University of Toronto (UofT).

His Advanced Micro and Nanosystems Laboratory develops MEMS devices and micro-nanorobotic systems to manipulate and characterize cells, molecules, and nanomaterials under optical and electron microscopes.

Sun obtained his Ph.D. in mechanical engineering from the University of Minnesota in 2003. He did postdoctoral research at the Swiss Federal Institute of Technology (ETH-Zürich) before he joined Toronto in 2004. He is a McLean Senior Faculty Fellow at UofT and the Canada Research Chair in Micro and Nano Engineering Systems. During 2012 and 2013, he directed the University’s Nanofabrication Center that hosts 50$Million micro-nanofabrication equipment. He is a fellow of the ASME (American Society of Mechanical Engineers) and a fellow of the EIC (Engineering Institute of Canada).