Authors thank Jeffrey Sellers to assist orthotopic pancreatic cancer mouse modeling. This work was supported by Research Initiative Pilot Awards from the Department of Radiology at UAB and NIH grants 2P30CA013148 and P50CA101955.

All procedures were approved by the Institutional Animal Care and Use Committee at the University of Alabama at Birmingham.
1. Orthotopic Pancreatic Tumor Mouse Modeling
<ol>
	<li>Culture standard human pancreatic-cancer cell lines in Dulbecco&#8217;s modified Eagle&#8217;s medium (DMEM) supplemented with 10% fetal bovine serum. Maintain all cultures at 37 &#176;C in humidified atmosphere with 5% CO2.</li>
	<li>Use 8-10 week-old female severe combined immunodeficient&#160;mice. Pl...

<ol>
	<li>Ergul, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assessment+of+multifocality+and+axillary+nodal+involvement+in+early-stage+breast+cancer+patients+using+18F-FDG+PET/CT+compared+to+contrast-enhanced+and+diffusion-weighted+magnetic+resonance+imaging+and+sentinel+node+biopsy.">Assessment of multifocality and axillary nodal involvement in early-stage breast cancer patients using 18F-FDG PET/CT compared to contrast-enhanced and diffusion-weighted magnetic resonance imaging and sentinel node biopsy.</a> Acta Radiol. , (2014).</li><li>Park, J. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assessment+of+early+response+to+concurrent+chemoradiotherapy+in+cervical+cancer:+value+of+diffusion-weighted+and+dynamic+contrast-enhanced+MR+imaging.">Assessment of early response to concurrent chemoradiotherapy in cervical cancer: value of diffusion-weighted and dynamic contrast-enhanced MR imaging.</a> Magn Reson Imaging. , (2014).</li><li>Nguyen, H. T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Prediction+of+chemotherapeutic+response+in+bladder+cancer+using+K-means+clustering+of+dynamic+contrast-enhanced+(DCE)-MRI+pharmacokinetic+parameters.">Prediction of chemotherapeutic response in bladder cancer using K-means clustering of dynamic contrast-enhanced (DCE)-MRI pharmacokinetic parameters.</a> J Magn Reson Imaging. 10, (2014).</li><li>Teo, Q. Q., Thng, C. H., Koh, T. S., Ng, Q. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dynamic+Contrast-enhanced+Magnetic+Resonance+Imaging:+Applications+in+Oncology.">Dynamic Contrast-enhanced Magnetic Resonance Imaging: Applications in Oncology.</a> Clin Oncol (R Coll Radiol). , (2014).</li><li>Zhang, X., Pagel, M. D., Baker, A. F., Gillies, R. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reproducibility+of+magnetic+resonance+perfusion+imaging.">Reproducibility of magnetic resonance perfusion imaging.</a> PLoS One. 9 (2), e89797 (2014).</li><li>Kim, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pancreatic+adenocarcinoma:+a+pilot+study+of+quantitative+perfusion+and+diffusion-weighted+breath-hold+magnetic+resonance+imaging.">Pancreatic adenocarcinoma: a pilot study of quantitative perfusion and diffusion-weighted breath-hold magnetic resonance imaging.</a> Abdominal imaging. , (2014).</li><li>Derosier, L. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Combination+Treatment+with+TRA-8+Anti+Death+Receptor+5+Antibody+and+CPT-11+Induces+Tumor+Regression+in+an+Orthotopic+Model+of+Pancreatic+Cancer.">Combination Treatment with TRA-8 Anti Death Receptor 5 Antibody and CPT-11 Induces Tumor Regression in an Orthotopic Model of Pancreatic Cancer.</a> Clin Cancer Res. 13 (18), 5535s-5543s (2007).</li><li>Derosier, L. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TRA-8+anti-DR5+monoclonal+antibody+and+gemcitabine+induce+apoptosis+and+inhibit+radiologically+validated+orthotopic+pancreatic+tumor+growth.">TRA-8 anti-DR5 monoclonal antibody and gemcitabine induce apoptosis and inhibit radiologically validated orthotopic pancreatic tumor growth.</a> Mol Cancer Ther. 6 (12), 3198-3207 (2007).</li><li>Kim, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+therapy+evaluation+of+combined+anti-death+receptor+5+antibody+and+gemcitabine+in+orthotopic+pancreatic+tumor+xenografts+by+diffusion-weighted+magnetic+resonance+imaging.">Early therapy evaluation of combined anti-death receptor 5 antibody and gemcitabine in orthotopic pancreatic tumor xenografts by diffusion-weighted magnetic resonance imaging.</a> Cancer Res. 68 (20), 8369-8376 (2008).</li><li>Klein, S., Staring, M., Murphy, K., Viergever, M. A., Pluim, J. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=elastix:+a+toolbox+for+intensity-based+medical+image+registration.">elastix: a toolbox for intensity-based medical image registration.</a> IEEE Trans Med Imaging. 29 (1), 196-205 (2010).</li><li>Kim, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+therapy+evaluation+of+combined+cetuximab+and+irinotecan+in+orthotopic+pancreatic+tumor+xenografts+by+dynamic+contrast-enhanced+magnetic+resonance+imaging.">Early therapy evaluation of combined cetuximab and irinotecan in orthotopic pancreatic tumor xenografts by dynamic contrast-enhanced magnetic resonance imaging.</a> Mol Imaging. 10 (3), 153-167 (2011).</li><li>Kim, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Antagonistic+effects+of+anti-EMMPRIN+antibody+when+combined+with+chemotherapy+against+hypovascular+pancreatic+cancers.">Antagonistic effects of anti-EMMPRIN antibody when combined with chemotherapy against hypovascular pancreatic cancers.</a> M Mol Imaging Biol. 16 (1), 85-94 (2014).</li><li>Kim, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dual+combination+therapy+targeting+DR5+and+EMMPRIN+in+pancreatic+adenocarcinoma.">Dual combination therapy targeting DR5 and EMMPRIN in pancreatic adenocarcinoma.</a> Mol Cancer Ther. 11 (2), 405-415 (2012).</li><li>Moyher, S. E., Vigneron, D. B., Nelson, S. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surface+coil+MR+imaging+of+the+human+brain+with+an+analytic+reception+profile+correction.">Surface coil MR imaging of the human brain with an analytic reception profile correction.</a> J Magn Reson Imaging. 5 (2), 139-144 (1995).</li><li>Voigt, T., Nehrke, K., Doessel, O., Katscher, U. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=T1+corrected+B1+mapping+using+multi-TR+gradient+echo+sequences.">T1 corrected B1 mapping using multi-TR gradient echo sequences.</a> Magn Reson Med. 64 (3), 725-733 (2010).</li><li>Liu, H., Liu, Y., Zhao, Z., Zhang, L., Qiu, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+new+background+distribution-based+active+contour+model+for+three-dimensional+lesion+segmentation+in+breast+DCE-MRI.">A new background distribution-based active contour model for three-dimensional lesion segmentation in breast DCE-MRI.</a> Medical physics. 41 (8), 082303 (2014).</li><li>Sarkar, S., Das, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multilevel+image+thresholding+based+on+2D+histogram+and+maximum+Tsallis+entropy--a+differential+evolution+approach.">Multilevel image thresholding based on 2D histogram and maximum Tsallis entropy--a differential evolution approach.</a> IEEE Trans Image Process. 22 (12), 4788-4797 (2013).</li><li>Yankeelov, T. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Quantitative+pharmacokinetic+analysis+of+DCE-MRI+data+without+an+arterial+input+function:+a+reference+region+model.">Quantitative pharmacokinetic analysis of DCE-MRI data without an arterial input function: a reference region model.</a> Magn Reson Imaging. 23 (4), 519-529 (2005).</li><li>Cardenas-Rodriguez, J., Howison, C. M., Pagel, M. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+linear+algorithm+of+the+reference+region+model+for+DCE-MRI+is+robust+and+relaxes+requirements+for+temporal+resolution.">A linear algorithm of the reference region model for DCE-MRI is robust and relaxes requirements for temporal resolution.</a> Magn Reson Imaging. 31 (4), 497-507 (2013).</li><li>Tofts, P. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Estimating+kinetic+parameters+from+dynamic+contrast-enhanced+T(1)-weighted+MRI+of+a+diffusable+tracer:+standardized+quantities+and+symbols.">Estimating kinetic parameters from dynamic contrast-enhanced T(1)-weighted MRI of a diffusable tracer: standardized quantities and symbols.</a> J Magn Reson Imaging. 10 (3), 223-232 (1999).</li><li>Yankeelov, T. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+of+a+reference+region+model+with+direct+measurement+of+an+AIF+in+the+analysis+of+DCE-MRI+data.">Comparison of a reference region model with direct measurement of an AIF in the analysis of DCE-MRI data.</a> Magn Reson Med. 57 (2), 353-361 (2007).</li><li>Cao, R. Y., Amand, T., Ford, M. D., Piomelli, U., Funk, C. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+Murine+Angiotensin+II-Induced+Abdominal+Aortic+Aneurysm+Model:+Rupture+Risk+and+Inflammatory+Progression+Patterns.">The Murine Angiotensin II-Induced Abdominal Aortic Aneurysm Model: Rupture Risk and Inflammatory Progression Patterns.</a> Front Pharmacol. 1 (9), (2010).</li><li>Parker, G. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Experimentally-derived+functional+form+for+a+population-averaged+high-temporal-resolution+arterial+input+function+for+dynamic+contrast-enhanced+MRI.">Experimentally-derived functional form for a population-averaged high-temporal-resolution arterial input function for dynamic contrast-enhanced MRI.</a> Magn Reson Med. 56 (5), 993-1000 (2006).</li><li>Tseng, W., Leong, X., Engleman, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Orthotopic+mouse+model+of+colorectal+cancer.">Orthotopic mouse model of colorectal cancer.</a> J Vis Exp. (10), 484 (2007).</li><li>Bhullar, J. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+true+orthotopic+gastric+cancer+murine+model+using+electrocoagulation.">A true orthotopic gastric cancer murine model using electrocoagulation.</a> J Am Coll Surg. 217 (1), 64-70 (2013).</li></ol>

Authors do not have any conflicts of interest to declare.

We have introduced the detailed methods of orthotopic pancreatic tumor modeling using immunodeficient mice, DCE-MRI of abdominal tumors in mice, and quantification of its kinetic parameters. In orthotopic pancreatic tumor modeling, care must be taken when inserting a needle into the tail of pancreas. If successful, cells will be transferred to the head of pancreas creating a small bleb. When applying an orthogonally bent plastic board, it is critical to confirm that the tumor is located below the upper end of the board. ...

The overall goal of this method is to apply dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for orthotopic pancreatic tumor xenografts in mice. DCE-MRI is a non-invasive method to assess microvasculature in a target tissue by monitoring the change of MR contrast over a certain period of time after injection. DCE-MRI has been utilized to diagnose malignant tumors and to assess tumor response to various therapies1-4. Quantitative DCE-MRI has presented high reproducibility5. To quantitate pharmacokinetic parameters of an MR contrast agent in a target tissue, all DCE-MR images acquired at different time points and T1 map obtained before contrast injection must be coregistered6. However, due to respiratory and peristaltic motions in the abdominal area, quantitative DCE-MRI has had limited application for gastrointestinal tumors.
Orthotopic pancreatic tumor models have been utilized to assess pancreatic-tumor response following biological therapies and chemotherapies7,8. Orthotopic tumor models are considered superior to conventional subcutaneous models, since the microenvironment in the original tumor site is reflected and thereby human tumor response to therapy can be more accurately predicted. However, the mouse pancreas is located in the left upper quadrant of the abdomen, so quantitative DCE-MRI of orthotopic pancreatic tumor xenografts in mice has not been readily implemented.
We have established a protocol of DCE-MRI of abdominal tumors in mice by fixing the tumors using an orthogonally bent plastic board to prevent motion transfer from the chest region9. The pressure applied by this board was localized on the abdominal area, and has not resulted in respiratory difficulty. An automated image coregistration technique has been validated for DCE-MRI of abdominal organs in a free-breathing mode, but it performs effectively only when the target regions move slowly and regularly10. Respiratory rate of animals is variable during imaging, so physical restraint in the abdominal area will be necessary to retrieve reliable pharmacokinetic parameters in orthotopic pancreatic tumor mouse models. We have successfully quantitated the pharmacokinetic parameters of an MR contrast agent in orthotopic pancreatic tumor xenografts using the orthogonally bent plastic board in DCE-MRI11-13. Here we present the detailed procedure of orthotopic pancreatic tumor modeling, DCE-MRI of the tumor xenografts in mice, and quantification of pharmacokinetic parameters.

<table border="0" cellpadding="0" cellspacing="0" width="1275">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:245px;">Name of Material/ Equipment</td>
			<td style="width:199px;">Company</td>
			<td style="width:119px;">Catalog Number</td>
			<td style="width:712px;">Comments/Description</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">DMEM</td>
			<td>Invitrogen</td>
			<td>11965-118</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Fetal bovine serum</td>
			<td>Harlan Laboratories</td>
			<td>BT-9501</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Betadine</td>
			<td style="width:199px;">Purdue products</td>
			<td style="width:119px;">67618-153-01</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">5-0 Prolene sutures</td>
			<td style="width:199px;">Ethicon</td>
			<td style="width:119px;">8720H</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">9.4T MR scanner</td>
			<td>Bruker Biospin Corporation</td>
			<td style="width:119px;">BioSpec 94/20 USR</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Gadoteridol</td>
			<td>Bracco Diagnostics Inc</td>
			<td style="width:119px;">NDC 0270-1111-03</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Micro-polyethelene tube</td>
			<td style="width:199px;">Strategic Applications, Inc</td>
			<td style="width:119px;">#PE-10-25</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">30G blunt tip needle</td>
			<td style="width:199px;">Strategic Applications, Inc</td>
			<td style="width:119px;">89134-194</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Monitoring and gating system</td>
			<td style="width:199px;">SA instruments, Inc</td>
			<td style="width:119px;">Model 1030</td>
			<td>This is an MR compatiable system to measure resiratory rating and body temperature of small animals at the same time.</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Syringe pump</td>
			<td>New Era Pump Systems, Inc.</td>
			<td>NE-1600</td>
			<td></td>
		</tr>
	</tbody>
</table>

dynamic contrast enhanced magnetic resonance imaging of an orthotopic pancreatic cancer mouse model

Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) has been limitedly used for orthotopic pancreatic tumor xenografts due to severe respiratory motion artifact in the abdominal area. Orthotopic tumor models offer advantages over subcutaneous ones, because those can reflect the primary tumor microenvironment affecting blood supply, neovascularization, and tumor cell invasion. We have recently established a protocol of DCE-MRI of orthotopic pancreatic tumor xenografts in mouse models by securing tumors with an orthogonally bent plastic board to prevent motion transfer from the chest region during imaging. The pressure by this board was localized on the abdominal area, and has not resulted in respiratory difficulty of the animals. This article demonstrates the detailed procedure of orthotopic pancreatic tumor modeling using small animals and DCE-MRI of the tumor xenografts. Quantification method of pharmacokinetic parameters in DCE-MRI is also introduced. The procedure described in this article will assist investigators to apply DCE-MRI for orthotopic gastrointestinal cancer mouse models.

Human pancreatic tumor cells grow successfully in mouse pancreas creating a solid tumor. Figure 1 shows photographs of (A) a normal pancreas where tumor cell solution is injected, and (B) a representative mouse bearing an orthotopic pancreatic tumor xenograft (MIA PaCa-2). Tumor is located in the left upper quadrant of abdomen, next to the spleen. It usually takes 2 - 4 weeks for the tumors to grow up to 5 - 7 mm in diameter after cell implantation.
Motion of orthotopic pancre...

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Dynamic Contrast Enhanced Magnetic Resonance Imaging of an Orthotopic Pancreatic Cancer Mouse Model

The goal of this protocol is to apply dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for orthotopic pancreatic tumor xenografts in mice. DCE-MRI is a non-invasive method to analyze microvasculature in a target tissue, and useful to assess vascular response in a tumor following a novel therapy.

Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) has been limitedly used for orthotopic pancreatic tumor xenografts due to severe ...

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15.0K Görüntüleme.  University of Alabama at Birmingham. The goal of this protocol is to apply dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for orthotopic pancreatic tumor xenografts in mice. DCE-MRI is a non-invasive method to analyze microvasculature in a target tissue, and useful to assess vascular response in a tumor following a novel therapy. 