简介：
Overview
This protocol describes methods to infect human intestinal organoids to study host/pathogen interactions at the single-cell level using single-cell RNA sequencing (scRNAseq). It emphasizes the importance of using fully differentiated organoids and adhering to biosafety regulations when working with pathogens.
Key Study Components
Area of Science
- Neuroscience
- Microbiology
- Cell Biology
Background
- Understanding viral infections in human intestinal epithelium is crucial for developing therapeutic strategies.
- Human intestinal organoids serve as a model to study these interactions.
- Single-cell RNA sequencing allows for detailed analysis of cellular responses.
- Proper handling of Category 3 pathogens is essential for safety and accuracy.
Purpose of Study
- To characterize the response of individual cell types in human intestinal organoids to viral infections.
- To investigate how the route of infection affects cellular responses.
- To adapt the protocol for various pathogens and organoid cultures.
Methods Used
- Infection of organoids from apical or basolateral sides.
- Preparation of samples for single-cell RNA sequencing.
- Isolation of single cells from infected organoids.
- Analysis of immune responses and viral infection dynamics.
Main Results
- Only a subpopulation of intestinal epithelial cells supported SARS-CoV-2 infection.
- Infected cells exhibited a pro-inflammatory response, while non-infected cells showed an interferon-mediated response.
- Infected cells were unable to sense interferons due to viral interference.
- Organoid differentiation and health are critical for successful experiments.
Conclusions
- This protocol provides a framework for studying viral infections in human intestinal organoids.
- Findings highlight the complexity of host-pathogen interactions at the single-cell level.
- Future studies can leverage this method to explore other pathogens.
What are human intestinal organoids?
Human intestinal organoids are 3D structures derived from stem cells that mimic the architecture and function of the human intestine.
Why is single-cell RNA sequencing important?
Single-cell RNA sequencing allows researchers to analyze gene expression at the individual cell level, providing insights into cellular heterogeneity and responses.
What safety measures are necessary when working with Category 3 pathogens?
Biosafety regulations must be followed, including using appropriate personal protective equipment and working in designated biosafety cabinets.
How can this protocol be adapted for other pathogens?
The methods described can be modified based on the specific characteristics of the pathogen and the organoid culture conditions.
What are the key considerations for organoid health?
Ensuring that organoids are fully differentiated and maintained under optimal culture conditions is crucial for successful experiments.
What cellular responses were observed in SARS-CoV-2 infected organoids?
Infected organoids showed a pro-inflammatory response, while non-infected cells exhibited an interferon-mediated immune response.
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