Name: a multi-parametric islet perifusion system within a microfluidic perifusion device
Uploaded: 2010-01-26T17:00:00
Description: Watch this Scientific Journal Video about A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device at JoVE.com

<p class="jove_content">This work was supported by AAUW international fellowship to Adeola Adewola, NIH/NCRR (U42RR023245) to Jose Oberholzer, and The Chicago Diabetes Project.</p>

<p class="jove_title">A. Microfabrication of 3-layer microfluidic perifusion device</p>
<p class="jove_step">Bottom Well Master Protocol (150 &mu;m deep wells)</p>
<ol>
  <li>Clean the wafer using a razor blade if needed. Clean with Acetone, Methanol, and IPA. Perform plasma treatment at 50 Watts for 30 s.</li>
  <li>Spin SU8-100 @ 2000 rpm. [Step 1: 500 rpm, 10 s, 100 rpm/s, Step 2:  2000 rpm, 30 s, 300 rpm/s].<br />[NOTE: do not hold the wafer with tweezers after spinning SU8]</li>
  <li>Soft bake the wafer at 65 &deg;C for 20 min and at...

<ol>
	<li>Mohammed, J. S., Wang, Y., Harvat, T. A., Oberholzer, J., Eddington, D. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microfluidic+device+for+multimodal+characterization+of+pancreatic+islets.">Microfluidic device for multimodal characterization of pancreatic islets.</a> <em style='font-style: italic'>Lab Chip</em>. <b>9</b>, 97-106 (2009).</li></ol>

<p class="jove_content">Traditional islet perifusion systems (macroscale and microscale) have some limitations including complex of setup and design, high technical requirements, and difficulty to create user-prescribed chemical gradients in the system. The microfluidic perifusion system described here overcomes these limitations with simple geometry of design and fabrication. More important, this system can be integrated with fluorescence imaging approach that provide as a unique tool to study islet physiology. The system demonstrated with hig...

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		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
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<tr>
<td>60ml Syringes</td>
<td>&nbsp;</td>
<td>BD</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Fura-2 fluorescence dye</td>
<td>&nbsp;</td>
<td>Molecular Probes Inc.</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Rhodamine123 Fluorescence dye</td>
<td>&nbsp;</td>
<td>Molecular Probes Inc.</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Glucose</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Bovine Serum Albumin</td>
<td>&nbsp;</td>
<td>Sigma</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>30" Silicone tubings</td>
<td>&nbsp;</td>
<td>Cole Palmer</td>
<td>&nbsp;</td>
<td>1/16 x 1/8in</td>
</tr>
<tr>
<td>1.5ml Eppendorf tubes</td>
<td>&nbsp;</td>
<td>Fisher</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Y-connectors</td>
<td>&nbsp;</td>
<td>Cole Palmer</td>
<td>&nbsp;</td>
<td>1/16&#x201D; &amp; 4mm</td>
</tr>
<tr>
<td>Syringe connectors</td>
<td>&nbsp;</td>
<td>Cole Palmer</td>
<td>&nbsp;</td>
<td>female luer plug 1/16&#x201D;</td>
</tr>
<tr>
<td>Straight connectors</td>
<td>&nbsp;</td>
<td>Cole Palmer</td>
<td>&nbsp;</td>
<td>1/16&#x201D;</td>
</tr>
<tr>
<td>Elbow connector</td>
<td>&nbsp;</td>
<td>Cole Palmer</td>
<td>&nbsp;</td>
<td>1/16&#x201D;</td>
</tr>
<tr>
<td>Havard syringe pump</td>
<td>&nbsp;</td>
<td>Harvard Apparatus</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Perifusion device</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Hot plate</td>
<td>&nbsp;</td>
<td>PMC</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Thermometer</td>
<td>&nbsp;</td>
<td>Omega Engineering Inc.</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Fraction collector</td>
<td>&nbsp;</td>
<td>Gibson</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Pippettor</td>
<td>&nbsp;</td>
<td>Fisher</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Inverted epiflorescence microscope</td>
<td>&nbsp;</td>
<td>Olympus</td>
<td>IX71</td>
<td>&nbsp;</td>
<tr>
<td>Charge-coupled device</td>
<td>&nbsp;</td>
<td>QImaging</td>
<td>&nbsp;</td>
<td>Retiga-SRV, Fast 1394</td>
</tr>		</tbody>
		</table>
		</div>
	

a multi-parametric islet perifusion system within a microfluidic perifusion device

A microfluidic islet perifusion device was developed for the assessment of dynamic insulin secretion of multiple islets and simultaneous fluorescence imaging of calcium influx and mitochondrial potential changes. The device consists of three layers: first layer contains an array of microscale wells (500 &mu;m diameter and 150 &mu;m depth) that help to immobilize the islets while exposed to flow and maximize the exposed surface area of the islets; the second layer contains a circular perifusion chamber (3 mm deep, 7 mm diameter); and the third layer contains an inlet-mixing channel that fans out before injection into the perifusion chamber (2 mm in width, 19 mm in length, and 500 &mu;m in height) for optimizing the mixing efficiency prior to entering the perifusion chamber. The creation of various glucose gradients including a linear, bell shape, and square shapes also can be created in the microfluidic perifusion network and is demonstrated.

Watch this Scientific Journal Video about A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device at JoVE.com

A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device

<p class="jove_content">A microfluidic islet perifusion device was developed for the assessment of dynamic insulin secretion of multiple islets and simultaneous fluorescence imaging of calcium influx and mitochondrial potential changes. </p>

A microfluidic islet perifusion device was developed for the assessment of dynamic insulin secretion of multiple islets and simultaneous fluorescence ...

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