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Transient State Monitoring and Fluorescence Correlation Spectroscopy of Flavin Adenine Dinucleotide
KTH, School of Engineering Sciences (SCI), Applied Physics, Experimental Biomolecular Physics. KTH, School of Technology and Health (STH).
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Many human diseases including cancer have been associated with altered cellular metabolism and a changed oxygen consumption in cells. Fluorophores are sensitive to their local environment due to their long life times in transient dark states. A recent study successfully utilized this sensitivity to image differences in oxygen concentrations in cells using transient state (TRAST) microscopy together with fluorescent labels [1]. A natural continuation of this study is to investigate the possibilities of using this method with natural fluorophores already present in cells and thereby avoid articial labeling.

Flavin adenine dinucleotide (FAD) is an auto fluorescent coenzyme that is naturally present in cells and involved in cellular metabolism. This project is an exploratory pilot study for cellular measurements with the aim to investigate if FAD can be used to probe oxygen concentrations in aqueous solution using transient state monitoring and fluorescence correlation spectroscopy (FCS). This thesis includes the results from FCS and TRAST experiments on FAD in aqueous solutions with different oxygen concentrations as well as different ascorbic acid concentrations. The performed experiments showed that FAD monitored with TRAST is sensitive to differences in oxygen concentrations for the aqueous solutions used in this study.

Place, publisher, year, edition, pages
2014. , 41 p.
TRITA-STH, 2014:82
Keyword [en]
Transient State Monitoring, Fluorescence Correlation Spectroscopy, Flavin Adenine Dinucleotide, FCS, TRAST, FAD
National Category
Biophysics Engineering and Technology Medical Engineering
URN: urn:nbn:se:kth:diva-154478OAI: diva2:757025
Subject / course
Educational program
Master of Science in Engineering - Medical Engineering
Available from: 2014-10-27 Created: 2014-10-20 Last updated: 2014-10-27Bibliographically approved

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