Name: isolation of lamina propria mononuclear cells from murine colon using collagenase e
Uploaded: 2019-09-26T13:30:00
Description: Watch this Scientific Journal Video about Isolation of Lamina Propria Mononuclear Cells from Murine Colon Using Collagenase E at JoVE.com

This work was supported by grants #1K08HL088260 and #1R01HL133462-01A1 (NHLBI) (A.B.P., H.N., S.J.), and the Batchelor Foundation for Pediatric Research (D.M., H.N., S.J., A.A.H., A.B.P.). C57BL/6 and BALB/c mice used in this study were either bred in our facility or provided by Jackson Labs or Taconic.

All studies were conducted under rodent research protocols reviewed and approved by the Institutional Animal Care and Use Committee (IACUC) of the University of Miami Miller School of Medicine, which meets the veterinary standards set by the American Association for Laboratory Animal Science (AALAS).
1. Preparation of Solutions
<ol>
	<li>As described in Table 1, prepare the Colon Buffer, Silica-Based Density Separation Media 100%, Silica-Based Density Separation Media 66%, Silica-bas...

<ol>
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This visual protocol describes well-tolerated methods for the isolation of colonic mononuclear cells including lamina propria lymphocytes (LPL). Given that this protocol was optimized in evaluating severe post-transplant mouse colitis models where inflammatory cytokines and tissue injury lend themselves to poor viability of recovered MNC, we anticipate that these methods can be translated to other applications requiring phenotypic analysis of colonic MNC. These include but, are not limited to assessing colon inflammation...

Though the gastrointestinal (GI) tract is primarily dedicated to the processing and reabsorption of nutrients from food, the GI tract also maintains central roles in the integrity of the vascular, lymphatic, and nervous systems and of numerous other organs through its mucosal and submucosal immune system1. The GI immune system has an influential role in both gastrointestinal and systemic health due to its constant exposure to foreign antigens from food, commensal bacteria, or invading pathogens1,2. Thus, the GI immune system must maintain a delicate balance in which it tolerates non-pathogenic antigens while responding appropriately to pathogenic antigens1,2. When the balance of tolerance and defense is disrupted, localized or systemic immune dysregulation and inflammation can occur resulting in a myriad of diseases1,2,3.
The intestine harbors at least 70% of all lymphoid cells in the body4. Most primary immunologic interactions involve at least one of three immune stations in the intestine: 1) Peyer&#8217;s Patches, 2) Intraepithelial lymphocytes (IEL) and 3) lamina propria lymphocytes (LPL). Each of these is comprised of a complex interconnected network of immune cells that rapidly respond to normal immune challenges in the gut5. Restricted to the stroma above the muscularis mucosae, the loosely structured lamina propria is the connective tissue of the gut mucosa and includes scaffolding for the villus, the vasculature, lymphatic drainage, and mucosal nervous system, as well as many innate and adaptive immune subsets6,7,8,9. LPL are comprised of CD4+ and CD8+ T cells in an approximate ratio of 2:1, plasma cells and myeloid lineage cells including, dendritic cells, mast cells, eosinophils and macrophages6.
There is a growing interest in understanding the immune dysregulation and inflammation of the gut as it pertains to various disease states. Such conditions as Crohn&#8217;s disease and ulcerative colitis all manifest varying levels of colonic inflammation10,11,12. Additionally, patients with malignant or non-malignant disorders of the marrow or immune system who undergo an allogeneic bone marrow transplantation (allo-BMT) can develop various forms of colitis including 1) direct toxicity from conditioning regimens before BMT, 2) infections caused by immunosuppression after BMT and 3) graft-versus-host disease (GVHD) driven by donor-type T cells reacting to donor allo-antigens in the tissues after BMT13,14,15. All these post-BMT complications result in significant alterations in the immune milieu of the intestines16,17,18. The proposed method allows a dependable assessment of immune cell accumulation in the mouse colon and, when applied to murine recipients after BMT, facilitates an efficient assay of both donor and recipient immune cells involved in transplant tolerance19,20. Additional causes of gut inflammation include malignancies, food allergies, or disruption of the gut microbiome. This protocol allows access of gut mononuclear cells from the colon and, with modifications, to leukocytes of the small intestine in any of these preclinical murine models.
A PubMed search using the search terms &#8220;intestine AND immune cell AND isolation&#8221; reveals over 200 publications describing methods for small intestine digestion to extract immune cells. However, a similar literature search for colon yields no well-delineated protocols specifying isolation of immune cells from the colon. This may be because the colon has more muscular and interstitial layers, rendering it more difficult to completely digest than the small intestine. Unlike existing protocols, this protocol specifically uses Collagenase E from Clostridium histolyticum without other bacterial collagenases (Collagenase D/ Collagenase I). We demonstrate that, using this protocol, digestion of the colonic tissue can be achieved while preserving the quality of isolated gut mononuclear immune cells (MNC) without the addition of anti-clumping reagents such as sodium versenate (EDTA), Dispase II, and deoxyribonuclease I (DNAse I)21,22,23. This protocol is optimized to allow reproducible robust extraction of viable MNC from the murine colon for further directed studies and should lend itself to the study of immunology of the colon or (with modifications) the small intestine24,25.

<table>
	<tbody>
		<tr>
			<td>60 mm Petri DIsh</td>
			<td>Thermo Scientific</td>
			<td>150288</td>
			<td></td>
		</tr>
		<tr>
			<td>1x PBS</td>
			<td>Corning</td>
			<td>21-040-CV</td>
			<td></td>
		</tr>
		<tr>
			<td>10x PBS</td>
			<td>Lonza BioWhittaker</td>
			<td>BW17-517Q</td>
			<td></td>
		</tr>
		<tr>
			<td>10 mL Disposable Serological Pipette</td>
			<td>Corning</td>
			<td>4100</td>
			<td></td>
		</tr>
		<tr>
			<td>10mL Syringe</td>
			<td>Becton Dickinson</td>
			<td>302995</td>
			<td></td>
		</tr>
		<tr>
			<td>15mL Non-Sterile Conical Tubes</td>
			<td>TruLine</td>
			<td>TR2002</td>
			<td></td>
		</tr>
		<tr>
			<td>18- gauge Blunt Needle</td>
			<td>Becton Dickinson</td>
			<td>305180</td>
			<td></td>
		</tr>
		<tr>
			<td>25 mL Disposable Serological Pipette</td>
			<td>Corning</td>
			<td>4250</td>
			<td></td>
		</tr>
		<tr>
			<td>40 micrometer pore size Cell Strainer</td>
			<td>Corning</td>
			<td>352340</td>
			<td></td>
		</tr>
		<tr>
			<td>50 mL Falcon Tube</td>
			<td>Corning</td>
			<td>21008-951</td>
			<td></td>
		</tr>
		<tr>
			<td>Bovine Serum Albumin (BSA)</td>
			<td>Sigma</td>
			<td>A4503-1KG</td>
			<td></td>
		</tr>
		<tr>
			<td>Fixation Buffer</td>
			<td>Biolegend</td>
			<td>420801</td>
			<td></td>
		</tr>
		<tr>
			<td>E. coli Collagenase E from Clostridium histolyticum</td>
			<td>Sigma</td>
			<td>C2139</td>
			<td></td>
		</tr>
		<tr>
			<td>EDTA, 0.5M Sterile Solution</td>
			<td>Amresco</td>
			<td>E177-500ML</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal Bovine Serum</td>
			<td>Thermo /Fisher Scientific -HyCLone</td>
			<td>SV30014.03</td>
			<td></td>
		</tr>
		<tr>
			<td>HEPES</td>
			<td>GE Healthcare-HyClone</td>
			<td>SH30237.01</td>
			<td></td>
		</tr>
		<tr>
			<td>Percoll</td>
			<td>GE Healthcare-Life Sciences</td>
			<td>1708901</td>
			<td></td>
		</tr>
		<tr>
			<td>RPMI Medium</td>
			<td>Corning</td>
			<td>17-105-CV</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium Azide</td>
			<td>VWR Life Science Amresco</td>
			<td>97064-646</td>
			<td></td>
		</tr>
		<tr>
			<td>Trypan Blue</td>
			<td>Lonza BioWhittaker</td>
			<td>17-942E</td>
			<td></td>
		</tr>
	</tbody>
</table>

isolation of lamina propria mononuclear cells from murine colon using collagenase e

The intestine is the home to the largest number of immune cells in the body. The small and large intestinal immune systems police exposure to exogenous antigens and modulate responses to potent microbially derived immune stimuli. For this reason, the intestine is a major target site of immune dysregulation and inflammation in many diseases including but, not limited to inflammatory bowel diseases such as Crohn&#8217;s disease and ulcerative colitis, graft-versus-host disease (GVHD) after bone marrow transplantation (BMT), and many allergic and infectious conditions. Murine models of gastrointestinal inflammation and colitis are heavily used to study GI complications and to pre-clinically optimize strategies for prevention and treatment. Data gleaned from these models via isolation and phenotypic analysis of immune cells from the intestine is critical to further immune understanding that can be applied to ameliorate gastrointestinal and systemic inflammatory disorders. This report describes a highly effective protocol for the isolation of mononuclear cells (MNC) from the colon using a mixed silica-based density gradient interface. This method reproducibly isolates a significant number of viable leukocytes while minimizing contaminating debris, allowing subsequent immune phenotyping by flow cytometry or other methods.

When working with murine colon disease models, it is helpful to be able to both quantify and qualitatively assess, among the MNC of the colon, multiple immune cell subsets involved in the inflammatory process. The single-cell suspension of MNC obtained through the application of this protocol facilitates such phenotypic characterization in a robust and reproducible manner. As a proof of principle for the application of this isolation method under diverse experimental settings, we retrieve...

Watch this Scientific Journal Video about Isolation of Lamina Propria Mononuclear Cells from Murine Colon Using Collagenase E at JoVE.com

Isolation of Lamina Propria Mononuclear Cells from Murine Colon Using Collagenase E

The goal of this protocol is to isolate mononuclear cells that reside in the lamina propria of the colon by enzymatic digestion of the tissue using collagenase. This protocol allows for the efficient isolation of mononuclear cells resulting in a single cell suspension which in turn can be used for robust immunophenotyping.

The intestine is the home to the largest number of immune cells in the body. The small and large intestinal immune systems police exposure to exogenous ...

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