Isolation of Lamina Propria Mononuclear Cells from Murine Colon Using Collagenase E
September 26th, 2019
15.9K views
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.
Overview
This protocol describes the isolation of mononuclear cells from the lamina propria of the colon using enzymatic digestion with collagenase. The method yields a single cell suspension suitable for immunophenotyping, facilitating the study of intestinal immune populations.
Key Study Components
Area of Science
- Immunology
- Gastroenterology
- Cell Biology
Background
- Understanding immune cell populations in the intestine is crucial for studying gastrointestinal disorders.
- The intestine is a primary site of inflammation in various diseases.
- This protocol minimizes debris, enhancing the viability of isolated cells.
- It is applicable in mouse models for cancer, allergy, transplantation, and autoimmunity research.
Purpose of Study
- To isolate viable mononuclear cells from the colon for further analysis.
- To facilitate robust immunophenotyping of intestinal immune populations.
- To provide a reliable method for studying GI and systemic inflammatory disorders.
Methods Used
- Enzymatic digestion of colon tissue using collagenase.
- Preparation of key solutions and materials in advance.
- Dissection techniques for accessing the colon.
- Subsequent immune phenotyping using Fleur's Atomistry or similar methods.
Main Results
- Efficient isolation of a significant number of viable mononuclear cells.
- Minimized contamination allowing for accurate phenotypic analysis.
- Enhanced understanding of intestinal immune responses.
- Potential applications in various disease models.
Conclusions
- This protocol is effective for isolating intestinal immune cells.
- It supports research into inflammatory disorders affecting the gastrointestinal tract.
- Preparation and technique optimization are crucial for successful outcomes.
Frequently Asked Questions
What is the main goal of this protocol?
The main goal is to isolate mononuclear cells from the colon for immunophenotyping.
Why is it important to minimize debris during isolation?
Minimizing debris enhances the viability of isolated cells and improves analysis accuracy.
What diseases can this protocol help study?
It can help study cancer, allergy, transplantation, and autoimmunity.
What method is used for cell isolation?
Enzymatic digestion using collagenase is used for cell isolation.
How can the yield of isolated cells be optimized?
By preparing key solutions and materials in advance and following recommended techniques.
What is Fleur's Atomistry?
Fleur's Atomistry is a method used for immune phenotyping of isolated cells.
Executive Industry Relevance
Isolating viable lamina propria mononuclear cells from murine colon enables mechanistic de-risking of therapeutic targets in gastrointestinal inflammation models. This protocol supports predictive confidence in target validation by providing reproducible, debris-minimized immune cell yields for phenotypic analysis. It addresses a key discovery inflection point in immunology and gastroenterology R&D pipelines.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of immune cell phenotypes in murine colitis and transplant tolerance models.
- Operational Value: Provides standardized mononuclear cell isolation for functional target de-risking.
- Predictive Value: Supports quantification of rare immune subsets like donor-derived T regulatory cells post-BMT.
Screening & Assay Development
- Scientific Value: Generates debris-minimized single-cell suspensions suitable for flow cytometry and apoptosis/necrosis assays.
- Operational Value: Enables consistent immune phenotyping across collagenase variants (E vs D) with or without DNase.
- Assay Readiness: Facilitates comparison of lymphocyte viability and necrotic cell percentages under defined enzymatic conditions.
Translational & Preclinical Research
- Translational Continuity: Connects discovery-phase immune profiling to preclinical BMT and autoimmunity models.
- Disease-Relevant System: Applicable to mouse models of cancer, allergy, transplantation, and autoimmunity as noted in source.
- Risk-Adjusted Advancement: Supports evaluation of transplant tolerance mechanisms via colonic immune infiltrates.
Pipeline & Workflow Integration
This method integrates into the discovery continuum from hypothesis testing in immune phenotyping to lead identification in immunomodulator screening.
- Discovery Biology: Supports immune cell subset identification and pathway clarification in GI inflammation models.
- Screening: Enables standardized preparation of immune cells for compound screening in colitis and transplant models.
- Analytics: Provides quantitative outputs for apoptosis, necrosis, and immune subset frequencies via flow cytometry.
- Translational Research: Connects colonic immune profiling to preclinical validation in BMT and autoimmunity settings.
- Enterprise Reuse: Establishes a reusable platform for isolating intestinal mononuclear cells across multiple disease models.
Operational & Enterprise Impact
- Scientific Value: Enhances predictive confidence in target validation through viable, low-debris immune cell yields.
- Operational Value: Ensures reproducibility and standardization in immune cell isolation for multi-site studies.
- Strategic Value: Improves go/no-go decisions by enabling reliable quantification of rare immune populations.
- Portfolio Impact: Supports risk-adjusted prioritization of immunomodulators in GI and transplant therapeutic areas.
Implementation Considerations
- Requires expertise in murine tissue dissection and enzymatic digestion optimization.
- Dependent on access to orbital shakers, centrifuges, and cell strainers for gradient separation.
- Necessitates standardized collagenase preparation and quenching to maintain activity control.
- Requires adaptation of buffer volumes and digestion times when scaling across model systems.
- Limited by tissue yield variability and need for meticulous debris removal to ensure phenotypic accuracy.
Biopharma FAQs
Why does minimizing debris matter for immune phenotyping accuracy?
Minimizing contaminating debris enhances viability and purity of isolated mononuclear cells, which improves the reliability of flow cytometry data for apoptosis and necrosis measurements. This is critical when comparing collagenase E and D conditions with or without DNase treatment.
How does isolating mononuclear cells support target validation in transplant tolerance models?
Isolated colonic mononuclear cells enable quantification of rare immune subsets such as donor-derived FOX-P3 positive T regulatory cells after bone marrow transplantation. This supports mechanistic de-risking by validating therapeutic targets involved in transplant tolerance.
What quantitative measurements does this protocol enable for immune cell analysis?
The protocol enables measurement of apoptotic and necrotic/dead lymphocyte percentages via Annexin 5 and fixable live dead blue dye staining. It also allows calculation of mean absolute numbers of donor CD4+ and CD8+ T-cells extracted from the colon in BMT models.
Why are replication requirements important for cross-functional collaboration in immune cell isolation?
Reproducible isolation of significant numbers of viable leukocytes with minimal debris ensures consistent input for downstream immune phenotyping across teams. This supports reliable comparison of immune responses in experimental versus controlled mice in bone marrow transplant models.
What statistical analysis capabilities are required before implementing this isolation method?
Teams require the ability to compare fractions of apoptotic and necrotic lymphocytes and calculate mean absolute numbers of T-cell subsets across experimental groups. This enables statistical validation of immune responses in models of cancer, allergy, transplantation, and autoimmunity.
Chapters in this video
0:04
Title
1:00
Harvesting the Colon
1:32
Cleaning the Colon
3:10
Collagenase Digestion 1
3:34
Silica-Based Density Separation Media Gradient Separation
5:44
Collect Mononuclear Cells from the Gradient Interface
6:39
Results: Isolation of Lamina Propria Mononuclear Cells
8:40
Conclusion
