Name: dissection of the mouse pancreas for histological analysis and metabolic profiling
Uploaded: 2017-08-19T14:00:00
Description: Watch this Scientific Journal Video about Dissection of the Mouse Pancreas for Histological Analysis and Metabolic Profiling at JoVE.com

MAK acknowledges support for this work from the National Institutes of Health / National Cancer Institute grant number - 1R15CA152985-01A1. This project has also been supported by the Miami University Undergraduate Research Award Program, the Miami University Doctorate-Undergraduate Opportunities for Scholarship Program and the Miami University Summer Scholars Program.

The procedures carried out in the video and described below have been approved by the Institutional Animal Care and Use Committee (IACUC) at Miami University.
1. Preparation and Stimulus Test
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	<li>Establish two distinct areas for the surgical procedure, the operating table and the post-operation table. Stage both areas with all materials and utensils necessary.
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		<li>Stage the operating table under a vented hood. Arrange the table with the equipment in a manner that allows the con...

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	<li>Fesinmeyer, M. D., Austin, M. A., Li, C. I., De Roos, A. J., Bowen, D. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differences+in+Survival+by+Histologic+Type+of+Pancreatic+Cancer.">Differences in Survival by Histologic Type of Pancreatic Cancer.</a> Cancer Epidemiol Biomarkers Prev. 14 (7), 1766-1773 (2005).</li><li>Jackson-Grusby, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modeling+cancer+in+mice.">Modeling cancer in mice.</a> Oncogene. 21 (35), 5504-5514 (2002).</li><li>Heid, I., 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+requirement+of+Rac1+in+a+mouse+model+of+pancreatic+cancer.">Early requirement of Rac1 in a mouse model of pancreatic cancer.</a> Gastroenterology. 141 (2), 719-730 (2011).</li><li>Hingorani, S. R., 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=Preinvasive+and+invasive+ductal+pancreatic+cancer+and+its+early+detection+in+the+mouse.">Preinvasive and invasive ductal pancreatic cancer and its early detection in the mouse.</a> Cancer cell. 4 (6), 437-450 (2003).</li><li>Shi, 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=KRAS2+Mutations+in+Human+Pancreatic+Acinar-Ductal+Metaplastic+Lesions+Are+Limited+to+Those+with+PanIN+Implications+for+the+Human+Pancreatic+Cancer+Cell+of+Origin.">KRAS2 Mutations in Human Pancreatic Acinar-Ductal Metaplastic Lesions Are Limited to Those with PanIN Implications for the Human Pancreatic Cancer Cell of Origin.</a> Mol Cancer Res. 7 (2), 230-236 (2009).</li><li>LaConti, 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=Distinct+serum+metabolomics+profiles+associated+with+malignant+progression+in+the+KrasG12D+mouse+model+of+pancreatic+ductal+adenocarcinoma.">Distinct serum metabolomics profiles associated with malignant progression in the KrasG12D mouse model of pancreatic ductal adenocarcinoma.</a> BMC Genomics. 16 (1), 1-10 (2015).</li><li>Ludwig, M. R., 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=Surveying+the+serologic+proteome+in+a+tissue-specific+kras(G12D)+knockin+mouse+model+of+pancreatic+cancer.">Surveying the serologic proteome in a tissue-specific kras(G12D) knockin mouse model of pancreatic cancer.</a> Proteomics. 16 (3), 516-531 (2016).</li><li>Taylor, D. K., Mook, D. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isoflurane+Waste+Anesthetic+Gas+Concentrations+Associated+with+the+Open-Drop+Method.">Isoflurane Waste Anesthetic Gas Concentrations Associated with the Open-Drop Method.</a> J Am Assoc Lab Anim Sci. 48 (1), 61-64 (2009).</li><li>Parasuraman, S., Raveendran, R., Kesavan, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Blood+sample+collection+in+small+laboratory+animals.">Blood sample collection in small laboratory animals.</a> J Pharmacol Pharmacother. 1 (2), 87-93 (2010).</li><li>Li, D. S., Yuan, Y. H., Tu, H. J., Liang, Q. L., Dai, L. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+protocol+for+islet+isolation+from+mouse+pancreas.">A protocol for islet isolation from mouse pancreas.</a> Nature Protocols. 4 (11), 1649-1652 (2009).</li><li>Auer, 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=The+effects+of+frozen+tissue+storage+conditions+on+the+integrity+of+RNA+and+protein.">The effects of frozen tissue storage conditions on the integrity of RNA and protein.</a> Biotech Histochem. 89 (7), 518-528 (2014).</li><li>Ma, J., Leung, L. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Limbic+System+Participates+in+Mediating+the+Effects+of+General+Anesthetics.">Limbic System Participates in Mediating the Effects of General Anesthetics.</a> Neuropsychopharmacology. 31, 1177-1192 (2006).</li><li>Ijichi, 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=Aggressive+pancreatic+ductal+adenocarcinoma+in+mice+caused+by+pancreas-specific+blockade+of+transforming+growth+factor-&#946;+signaling+in+cooperation+with+active+Kras+expression.">Aggressive pancreatic ductal adenocarcinoma in mice caused by pancreas-specific blockade of transforming growth factor-&#946; signaling in cooperation with active Kras expression.</a> Genes Dev. 20 (22), 3147-3160 (2006).</li><li>Abiatari, I., 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=Moesin-dependent+cytoskeleton+remodelling+is+associated+with+an+anaplastic+phenotype+of+pancreatic+cancer.">Moesin-dependent cytoskeleton remodelling is associated with an anaplastic phenotype of pancreatic cancer.</a> J Cell Mol Med. 14 (5), 1166-1179 (2010).</li><li>Goodpaster, A. M., Romick-Rosendale, L. E., Kennedy, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=a+Statistical+significance+analysis+of+nuclear+magnetic+resonance-based+metabonomics+data.">a Statistical significance analysis of nuclear magnetic resonance-based metabonomics data.</a> Analytical biochemistry. 401, 134-143 (2010).</li><li>Yadav, D., 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=Idiopathic+Tumefactive+Chronic+Pancreatitis:+Clinical+Profile,+Histology,+and+Natural+History+After+Resection.">Idiopathic Tumefactive Chronic Pancreatitis: Clinical Profile, Histology, and Natural History After Resection.</a> Clin Gastroenterol Hepatol. 1 (2), 129-135 (2003).</li></ol>

Significance with Respect to Existing Methods 
While other informal videos of mouse dissections exist, this video article provides the first professional quality, peer reviewed, visual demonstration of all of the detailed steps required for extraction and harvesting of the mouse pancreas by dissection10. With the pancreas being a main organ for metabolic activity and insulin production, dissection and harvesting of the pancreas allows for the preservation of the physiological...

The mouse has emerged as an important animal model of human pancreatic cancer1,2. In the Ptf1acre/+;LSL-KrasG12D/+ mouse model, the Kristen rat sarcoma (K-Ras) oncogene is activated exclusively in the pancreas, resulting in initiation of precancerous lesions in the pancreas, known as pancreatic intraepithelial neoplasias (PanINs), that progress to pancreatic ductal adenocarcinomas, commonly referred to as PDACs3. This mouse model system provides one of the best available animal models for human pancreatic cancer4,5, with the additional advantage that the PanINs emerge within the first five months of life and frequently progress to PDAC within a single year4,5, whereas pancreatic cancer most frequently occurs in humans 60-70 years of age.
Extraction of the pancreas by dissection from the Ptf1acre/+;LSL-KrasG12D/+ mice at various ages allows for detailed longitudinal histological examination of cancer development in the pancreas, ranging from the earliest PanIN stages through the progression to PDAC3,4,5. Harvesting the pancreas at ages ranging from five to fifteen months can also be used to prepare tissue extracts to characterize global changes in pancreas4 metabolism that occur during the transition from healthy to diseased tissue6,7.
This article presents a complete visual guide of the steps required to perform a mouse pancreas extraction and provides guidelines for storage of a pancreas for further analysis. This guide will be equally valuable for individuals conducting research on other pancreatic diseases, including type I diabetes, and should be especially useful to students and investigators new to research involving harvesting of the mouse pancreas using dissection for metabolic profiling or histological analyses.

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dissection of the mouse pancreas for histological analysis and metabolic profiling

We have been investigating the pancreas specific transcription factor, 1a cre-recombinase; lox-stop-lox- Kristen rat sarcoma, glycine to aspartic acid at the 12 codon (Ptf1acre/+;LSL-KrasG12D/+) mouse strain as a model of human pancreatic cancer. The goal of our current studies is to identify novel metabolic biomarkers of pancreatic cancer progression. We have performed metabolic profiling of urine, feces, blood, and pancreas tissue extracts, as well as histological analyses of the pancreas to stage the cancer progression. The mouse pancreas is not a well-defined solid organ like in humans, but rather is a diffusely distributed soft tissue that is not easily identified by individuals unfamiliar with mouse internal anatomy or by individuals that have little or no experience performing mouse organ dissections. The purpose of this article is to provide a detailed step-wise visual demonstration to guide novices in the removal of the mouse pancreas by dissection. This article should be especially valuable to students and investigators new to research that requires harvesting of the mouse pancreas by dissection for metabolic profiling or histological analyses.

Figure 1 shows an overview of the operating environment area and Figure 2 shows the post operation area. While this setting provides the minimal amount of equipment and staging, individuals may choose to alter this to best suit individual needs. The protocol should be optimized according to the specific needs of the experiment. This procedure is conducted in a manner that terminates the life of a mouse, requiring proper euthaniza...

Watch this Scientific Journal Video about Dissection of the Mouse Pancreas for Histological Analysis and Metabolic Profiling at JoVE.com

Dissection of the Mouse Pancreas for Histological Analysis and Metabolic Profiling

This video article provides a detailed demonstration of the procedures required to successfully remove the pancreas from a mouse by dissection for histological analysis and metabolic profiling.

We have been investigating the pancreas specific transcription factor, 1a cre-recombinase; lox-stop-lox- Kristen rat sarcoma, glycine to aspartic acid at ...

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