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A comparative study of metabolic state of stem cells during osteogenic and adipogenic differentiations via fluorescence lifetime imaging microscopy *

Cellular metabolic state can serve as a biomarker to indicate the differentiation potential of stem cells into other specialized cell lineages. In this study, two-photon fluorescence lifetime imaging microscopy (2P-FLIM) was applied to determine the fluorescence lifetime and the amounts of the auto-fluorescent metabolic co-factor reduced nicotinamide adenine dinucleotide (NADH) to elucidate the cellular metabolism of human mesenchymal stem cells (hMSCs) in osteogenic and adipogenic differentiation processes. 2P-FLIM provides the free to protein-bound NADH ratio which can serve as the indicator of cellular metabolic state. We measured NADH fluorescence lifetime at 0, 7, and 14 days after hMSCs were induced for either osteogenesis or adipogenesis. In both cases, the average fluorescence lifetime increased significantly at day 14 (P < 0.001), while the ratio of free to protein-bound NADH ratio decreased significantly in 7- days (P < 0.001) and 14-days (P < 0.001). Thus, our results indicated a higher metabolic rate in both osteogenic and adipogenic differentiation processes when compared with undifferentiated hMSCs. This approach may be further utilized to study proliferation efficiency and differentiation potential of stem cells into other specialized cell lineages.

* Legal Disclaimer: Chelation and Hyperbaric Therapy, Stem Cell Therapy, and other treatments and modalities mentioned or referred to in this web site are medical techniques that may or may not be considered “mainstream”. As with any medical treatment, results will vary among individuals, and there is no implication or guarantee that you will heal or achieve the same outcome as patients herein.

As with any procedure, there could be pain or other substantial risks involved. These concerns should be discussed with your health care provider prior to any treatment so that you have proper informed consent and understand that there are no guarantees to healing.

THE INFORMATION IN THIS WEBSITE IS OFFERED FOR GENERAL EDUCATIONAL PURPOSES ONLY AND DOES NOT IMPLY OR GIVE MEDICAL ADVICE. No Doctor/Patient relationship shall be deemed to have arisen simply by reading the information contained on these pages, and you should consult with your personal physician/care giver regarding your medical treatment before undergoing any sort of treatment or therapy.

Published on 09-29-2017
Authors: Sandeep Chakraborty; Meng-Hsin Ou; Jean-Cheng Kuo; Arthur Chiou