Department Chair

M. Scott Goodman, Ph.D., Associate Professor of Chemistry

Date of Award

8-2015

Access Control

Campus-Only Access

Degree Name

Forensic Science, M.S.

Department

Chemistry Department

Advisor

Jinseok Heo, Ph.D., Assistant Professor of Chemistry

Department Home page

http://chemistry.buffalostate.edu/forensic-science-ms-8

First Reader

Joonyeong Kim, Ph.D., Associate Professor of Chemistry

Second Reader

I. M. Skerrett, Ph.D., Chair and Associate Professor of Biology

Abstract

In response to external stimuli, cells alter their chemical and physical properties. One interesting physiological phenomena is cell volume regulation. This particular mechanism is critical for cell survival and responsible for maintaining cell volume homeostasis after osmotic shock. Many efforts have been made to develop techniques of measuring cell volume change, however previously developed techniques lack the ability to screen malfunctioning single cells among a population of cells with high throughput. Probing the behaviors of single cells can provide valuable information that can be hidden by the averaged information of a population of cells. By using a polydimethylsiloxane (PDMS) template and photocrosslinkable hydrogel precursor solution, we have created a new method of fabricating a single cell array based on hydrogel. The hydrogel array was constructed on glass and the glass surface within the wells was treated with fibronectin to promote cell adhesion. The size of the hydrogel microwell was controlled to contain a single cell. Madin-Darby Canine Kidney Epithelial (MDCK) cells were grown in the well array. Greater than 50% of the array was occupied by single cells. After exposure to hypotonic solution, cell volume regulation was assayed using Calcein-AM dye. Since the microwell array can precisely locate the positions of individual cells, dynamic behaviors of single cells could be traced over long periods of time. By exploring volume regulation phenomena using our single cell array, it is possible to screen malfunctioning cells in high throughput and therefore clarify the cause of heterogeneous responses of single cells. In addition, the cells in the well array can be easily accessed for further genomic or proteomic analysis.

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