Isolation of Adipogenic and Fibro-Inflammatory Stromal Cell Subpopulations from Murine Intra-Abdominal Adipose Depots
August 16th, 2020
3.1K views
This protocol describes the technical approach to isolate adipogenic and fibro-inflammatory stromal cell subpopulations from murine intra-abdominal white adipose tissue (WAT) depots by fluorescence-activated cell sorting or immunomagnetic bead separation.
Overview
This protocol describes a method to isolate distinct subpopulations of stromal cells from murine intra-abdominal white adipose tissue using fluorescence-activated cell sorting or immunomagnetic bead separation. The technique allows for the study of functionally and molecularly unique cell types within the adipose tissue.
Key Study Components
Area of Science
- Cell biology
- Adipose tissue research
- Stromal cell isolation
Background
- Adipose tissue contains various cell types that play roles in metabolism and inflammation.
- Understanding these cell populations can provide insights into metabolic diseases.
- Isolation techniques are crucial for studying specific cell functions.
- This protocol utilizes widely available tools and reagents.
Purpose of Study
- To isolate adipogenic and fibro-inflammatory stromal cell subpopulations.
- To facilitate research on the roles of these cells in metabolic processes.
- To provide a reproducible method for researchers in the field.
Methods Used
- Fluorescence-activated cell sorting (FACS)
- Immunomagnetic bead separation
- Cell lysis and filtration techniques
- Resuspension in FBS and PBS with FC block
Main Results
- Successful isolation of distinct stromal cell populations.
- Demonstration of the procedure by a senior laboratory analyst.
- Potential applications in studying adipose tissue biology.
- Validation of the method using mouse models.
Conclusions
- The protocol provides a reliable method for isolating specific cell types from adipose tissue.
- It can enhance understanding of the cellular dynamics in metabolic diseases.
- Widespread availability of reagents makes it accessible for many researchers.
Frequently Asked Questions
What is the main advantage of this isolation technique?
The technique utilizes widely available tools and reagents, making it accessible for researchers.
Who demonstrates the procedure in the video?
Lavanya Vishvanath, a senior laboratory research analyst from Dr. Rana Gupta's laboratory.
What types of cells can be isolated using this protocol?
Adipogenic and fibro-inflammatory stromal cell subpopulations from white adipose tissue.
How are the cells processed after isolation?
Cells are resuspended in red blood cell lysis buffer and filtered through a cell strainer.
What is the significance of studying these cell populations?
Understanding these populations can provide insights into metabolic diseases and their mechanisms.
Executive Industry Relevance
Isolating functionally distinct stromal cell subpopulations from adipose tissue enables mechanistic de-risking in metabolic disease target validation. This approach supports phenotypic screening and assay development by providing disease-relevant systems for evaluating adipogenic and fibro-inflammatory pathways. Reliable isolation of adipogenic precursor cells and fibro-inflammatory progenitors enhances predictive confidence in preclinical models of obesity and related disorders.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of therapeutic hypotheses by isolating adipogenic and fibro-inflammatory stromal subpopulations for functional analysis.
- Operational Value: Provides purified cell fractions to clarify pathway-specific contributions to adipose tissue remodeling.
- Predictive Value: Supports biological de-risking through direct assessment of cell-intrinsic adipogenic potential and inflammatory phenotype.
Screening & Assay Development
- Scientific Value: Generates standardized stromal cell populations suitable for in vitro differentiation assays and molecular profiling.
- Operational Value: Delivers reproducible, quantifiable outputs via FACS or immunomagnetic bead separation for compound screening readiness.
- Scalability: Uses widely available reagents and equipment, supporting platform reuse across discovery workflows.
Translational & Preclinical Research
- Scientific Value: Maintains disease relevance by isolating stromal subpopulations from murine intra-abdominal adipose depots linked to metabolic dysfunction.
- Operational Value: Ensures translational continuity from discovery through preclinical validation using defined cellular inputs.
- Risk Mitigation: Facilitates risk-adjusted advancement decisions by enabling side-by-side comparison of adipogenic versus fibro-inflammatory responses.
Pipeline & Workflow Integration
The method integrates into early discovery workflows by providing validated stromal cell systems for target validation and lead identification efforts in metabolic disease research.
- Discovery Biology: Supports hypothesis testing and pathway clarification through isolation of molecularly distinct PDGFRβ+ perivascular cell subpopulations.
- Screening: Enables assay standardization and quantitative readouts for adipogenic differentiation and inflammatory profiling.
- Analytics: Yields flow-cytometry validated fractions (e.g., Ly6C−CD9− APCs, Ly6C+CD9+ FIPs) for downstream functional and genomic analysis.
- Translational Research: Connects to preclinical continuity by supplying cells that reflect human adipose stromal heterogeneity in metabolic disease models.
- Enterprise Reuse: Establishes a reusable isolation capability applicable across multiple adipose depots and experimental conditions.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence by reducing mechanistic ambiguity in stromal cell contributions to adipose expansion and inflammation.
- Operational Value: Enhances reproducibility and standardization through FACS or bead-based separation using widely available reagents.
- Strategic Value: Improves go/no-go decisions by enabling early detection of pro-inflammatory or fibrotic stromal phenotypes.
- Portfolio Impact: Supports risk-adjusted prioritization of targets based on stromal cell-mediated metabolic risk.
Implementation Considerations
- Requires expertise in flow cytometry, antibody staining, and sterile cell handling for reliable subpopulation isolation.
- Depends on access to fluorescence-activated cell sorters or magnetic separation columns and 40 µm filtration systems.
- Necessitates cross-team standardization of antibody panels and gating strategies for consistent FIP and APC identification.
- Involves adaptation considerations when applying the protocol to non-gonadal adipose depots, which may require alternative marker combinations.
- Practical limitations include cell yield variability and the need for immediate processing to maintain stromal cell viability and functionality.
Biopharma FAQs
Why is isolation of stromal subpopulations critical for target validation in metabolic disease?
Isolating adipogenic and fibro-inflammatory stromal subpopulations enables direct assessment of their distinct roles in adipose tissue expansion and inflammation, reducing mechanistic ambiguity in target validation.
How does independent variable isolation support discovery pipeline decision-making?
Separating adipogenic precursor cells from fibro-inflammatory progenitors allows researchers to evaluate compound effects on defined cellular inputs, improving target specificity and de-risking early-stage hypotheses.
What quantitative measurements enable stromal cell functional assessment post-isolation?
Flow cytometry validation of isolated fractions (e.g., >75% Ly6C−CD9− adipogenic cells, >75% Ly6C+CD9+ fibro-inflammatory cells) provides quantitative benchmarks for purity and functional readiness.
Why do replication requirements matter for stromal isolation in cross-functional collaboration?
Consistent replication of FACS or immunomagnetic bead isolation ensures reproducible stromal cell inputs across teams, supporting reliable assay outcomes and shared preclinical datasets.
What statistical analysis capabilities are required before implementing stromal subpopulation isolation?
Proficiency in flow cytometry data analysis, including compensation setup and gating strategy validation, is required to accurately isolate and quantify adipogenic and fibro-inflammatory stromal fractions.
Chapters in this video
0:00
Introduction
0:35
Adipocyte Precursor Cell (APC) and Fibro‐Inflammatory Progenitor (FIP) FACS Isolation
2:22
Adipogenic and Non‐Adipogenic Cell Fraction Immunomagnetic Bead Separation
4:34
Cell Culture and Differentiation
5:07
Results: Isolation and Differentiation of Adipogenic Stromal Cell Subset
6:11
Conclusion
