Name: labeling stem cells with fluorescent dyes for non-invasive detection with optical imaging
Uploaded: 2008-04-02T18:00:00
Description: Watch this Scientific Journal Video about Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging at JoVE.com

<p class="jove_content">This project was supported by a Leon J. Thal SEED grant from the California Institute for Regenerative Medicine. Tobias Henning was funded by a Research stipend from the German Research Association (DFG, HE 4578/1-2). We want to gratefully acknowledge Juanito Meneses for his  advice on the culture of human embryonic stem cells.</p>

<p class="jove_step">Labeling of mesenchymal stem cells with the fluorescent dye DiD</p>
<ol>
<li>To begin the procedure for labeling mesenchymal stem cells, trypsinize and count the cells to get a suspension with a defined number of cells. </li>
<li>Take the cells out of the incubator and aspirate out old media from the flasks containing the cells to be labeled </li>
<li>Wash the cells with 10 ml of Mg/Ca-free PBS. Aspirate out the PBS. The Mg and Ca would inhibit the Trypsin, therefore we use PBS without these.</li>
<li>Add pre-warmed 0.05% T...

<ol>
	<li>Daldrup-Link, H. E., Rudelius, M., Metz, S., Piontek, G., Settles, M., Pichler, B., Heinzmann, U., Weinmann, H. J., Schlegel, J., Link, T. M., Rummeny, E. J., Oostendorp, R. A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stem+cell+tracking+with+Gadophrin-2+--+a+bifunctional+contrast+agent+for+MR+imaging,+optical+imaging+and+fluorescence+microscopy.">Stem cell tracking with Gadophrin-2 -- a bifunctional contrast agent for MR imaging, optical imaging and fluorescence microscopy.</a> <em style='font-style: italic'>Eur J Nucl Med Mol Imaging</em>. <b>31</b>, 1312-1321 (2004).</li><li>Simon, G. H., Daldrup-Link, H. E., Kau, J., Metz, S., Schlegel, J., Piontek, G., Saborowski, O., Demos, S., Duyster, J., Pichler, B. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optical+imaging+of+experimental+arthritis+using+allogeneic+leukocytes+labeled+with+a+near-infrared+fluorescent+probe.">Optical imaging of experimental arthritis using allogeneic leukocytes labeled with a near-infrared fluorescent probe.</a> <em style='font-style: italic'>Eur J Nucl Med &amp; Mol Imaging</em>. <b>33</b>, 998-1006 (2006).</li><li>Sutton, E., Henning, T., Pichler, B., Bremer, C., Daldrup-Link, H. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+Tracking+with+Optical+imaging.">Cell Tracking with Optical imaging.</a> <em style='font-style: italic'>Eur Radiol</em>. <b>2</b>, 350-357 (2003).</li><li>Funovics, M. A., Alencar, H., Su, H. S., Khazaie, K., Weissleder, R., Mahmood, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Miniaturized+multichannel+near+infrared+endoscope+for+mouse+imaging.">Miniaturized multichannel near infrared endoscope for mouse imaging.</a> <em style='font-style: italic'>Mol Imaging</em>. <b>2</b>, 350-357 (2003).</li></ol>

<p class="jove_content">OI is a relatively new imaging technique, based on the detection of fluorescence. OI is as sensitive as radiotracer-based imaging techniques, but not associated with any irradiation exposure. OI provides an effective means of tracking cells non-invasively and repetitively, thereby providing insight into cell migration to the target site. One major limitation of the technique is the limited tissue penetration of fluorescent probes in vivo. Thus, a tracer accumulation in deep tissues, more than about 5-10 cm from the skin ...

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		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
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		<tbody>
		
<tr>
<td>Indocyanine Green (IR-125)</td>
<td>Reagent</td>
<td>Fisher Scientific</td>
<td>AC41254-1000 </td>
<td>&nbsp;</td>
<tr>
<td>DMSO</td>
<td>Reagent</td>
<td>Sigma</td>
<td>D-2650 </td>
<td>&nbsp;</td>
<tr>
<td>D-MEM High Glucose </td>
<td>Reagent</td>
<td>Sigma</td>
<td>D5648</td>
<td>&nbsp;</td>
<tr>
<td>Gelatin</td>
<td>Reagent</td>
<td>Sigma</td>
<td>G1890</td>
<td>Dilute to final concentration of 0.1% in PBS</td>
</tr>
<tr>
<td>PBS, Mg and Ca free</td>
<td>Reagent</td>
<td>GIBCO </td>
<td>14190-144</td>
<td>&nbsp;</td>
<tr>
<td>Trypsin-EDTA 0.05% </td>
<td>Reagent</td>
<td>Invitrogen</td>
<td>25300-120</td>
<td>&nbsp;</td>
<tr>
<td>Trypsin-EDTA 0.25% </td>
<td>Reagent</td>
<td>Invitrogen</td>
<td>25200-114	</td>
<td>&nbsp;</td>
<tr>
<td>FCS, characterized</td>
<td>Reagent</td>
<td>Hyclone</td>
<td>SH30071.03</td>
<td>&nbsp;</td>
<tr>
<td>Cell Strainer (40 &#x03BC;m Nylon)</td>
<td>Reagent</td>
<td>BD Falcon</td>
<td>352340</td>
<td>&nbsp;</td>
<tr>
<td>DiD</td>
<td>Reagent</td>
<td>Molecular Probes</td>
<td>V-22887</td>
<td>
</td>
</tr>
<tr>
<td>Knockout DMEM</td>
<td>Reagent</td>
<td>GIBCO</td>
<td>10829018</td>
<td>&nbsp;</td>
<tr>
<td>Knockout Serum Replacer</td>
<td>Reagent</td>
<td>GIBCO</td>
<td>10828028</td>
<td>
</td>
</tr>
<tr>
<td>b-Mercaptoethanol </td>
<td>Reagent</td>
<td>Sigma</td>
<td>7522</td>
<td>&nbsp;</td>
<tr>
<td>Non-essential Amino Acids </td>
<td>Reagent</td>
<td>GIBCO</td>
<td>11140050</td>
<td>&nbsp;</td>
<tr>
<td>FGF-2</td>
<td>Reagent</td>
<td>R&D Systems </td>
<td> 233-FB-025</td>
<td>&nbsp;</td>
<tr>
<td>Glutamine 200mM </td>
<td>Reagent</td>
<td>GIBCO</td>
<td>25030081</td>
<td>&nbsp;</td>
<tr>
<td>Penicillin/Streptomycin</td>
<td>Reagent</td>
<td>GIBCO</td>
<td>15140-122</td>
<td>&nbsp;</td>
<tr>
<td>Protamine Sulfate</td>
<td>Reagent</td>
<td>American Pharmaceutical Partners Inc.</td>
<td>&nbsp;</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>
	

labeling stem cells with fluorescent dyes for non-invasive detection with optical imaging

Optical imaging (OI) is an easy, fast and inexpensive tool for in vivo monitoring of new stem cell based therapies. The technique is based on ex vivo labeling of stem cells with a fluorescent dye, subsequent intravenous injection of the labeled cells and visualization of their accumulation in specific target organs or pathologies. The presented technique demonstrates how we label human mesenchymal stem cells (hMSC) by simple incubation with the lipophilic fluorescent dye DiD (C67H103CIN2O3S) and how we label human embryonic stem cells (hESC) with the FDA approved fluorescent dye Indocyanine Green (ICG). The uptake mechanism is via adherence and diffusion of the lypophilic dye across the phospholipid cell membrane bilayer. The labeling efficiency is usually improved if the cells are incubated with the dye in serum-free media as opposed to incubation in serum-containing media. Furthermore, the addition of the transfection agent Protamine Sulfate significantly improves contrast agent uptake.

Watch this Scientific Journal Video about Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging at JoVE.com

Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging

<p class="jove_content">This video shows techniques for labeling of human embryonic stem cells and mesenchymal stem cells with fluorescent dyes. This technique can be used for an in vivo tracking of transplanted stem cells with optical imaging and for histopathological correlations with fluorescence microscopy.  </p>

Optical imaging (OI) is an easy, fast and inexpensive tool for in vivo monitoring of new stem cell based therapies. The technique is based on ex vivo ...

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