A Flexible Chamber for Time-Lapse Live-Cell Imaging with Stimulated Raman Scattering Microscopy
August 31st, 2022
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We report a stage-top, flexible environmental chamber for time-lapse imaging of live cells using upright stimulated Raman scattering microscopy with transmitted signal detection. Lipid droplets were imaged in SKOV3 cells treated with oleic acid for up to 24 h with a 3 min time interval.
Overview
This study presents a flexible environmental chamber designed for time-lapse imaging of live cells using stimulated Raman scattering (SRS) microscopy. The chamber allows for imaging lipid droplets in SKOV3 cells treated with oleic acid over a 24-hour period.
Key Study Components
Area of Science
- Neuroscience
- Cell Biology
- Imaging Techniques
Background
- Time-lapse imaging is crucial for observing dynamic cellular processes.
- Conventional imaging chambers may not fit within the constraints of certain microscope setups.
- Flexible chambers can maintain optimal physiological conditions for specimens.
- Stimulated Raman scattering microscopy provides high-resolution imaging capabilities.
Purpose of Study
- To develop a flexible environmental chamber for SRS microscopy.
- To enable time-lapse imaging of live cells.
- To facilitate the study of lipid droplet dynamics in treated cells.
Methods Used
- Design and implementation of a flexible environmental chamber.
- Utilization of SRS microscopy with high numerical aperture objectives.
- Imaging of SKOV3 cells treated with oleic acid.
- Time-lapse imaging over 24 hours with 3-minute intervals.
Main Results
- Lipid droplets were successfully imaged in live SKOV3 cells.
- The flexible chamber proved effective for maintaining physiological conditions.
- Time-lapse imaging revealed dynamic changes in lipid droplet morphology.
- The technique is easily adoptable for researchers using SRS microscopy.
Conclusions
- The flexible environmental chamber enhances the capabilities of SRS microscopy.
- This method allows for detailed observation of cellular processes over time.
- Future applications may include various cell types and treatments.
Frequently Asked Questions
What is stimulated Raman scattering microscopy?
Stimulated Raman scattering microscopy is an imaging technique that provides high-resolution images of biological samples by utilizing vibrational spectroscopy.
How does the flexible chamber work?
The flexible chamber adapts to the microscope setup, allowing for time-lapse imaging while maintaining optimal conditions for live cells.
What types of cells were used in this study?
SKOV3 cells, a type of ovarian cancer cell line, were used to study lipid droplet dynamics.
What is the significance of imaging lipid droplets?
Imaging lipid droplets is important for understanding cellular metabolism and the role of lipids in various diseases.
Can this technique be applied to other types of microscopy?
Yes, the flexible chamber can also be used with dissecting or sterile microscopes for various applications.
What are the time intervals used for imaging?
The study utilized a 3-minute time interval for time-lapse imaging over a 24-hour period.
Executive Industry Relevance
Long-term, label-free live-cell imaging is critical for understanding dynamic cellular processes in drug discovery and mechanistic research. The flexible chamber for SRS microscopy enables stable, high-resolution time-lapse imaging under physiological conditions, overcoming hardware constraints that previously limited adoption. This capability supports predictive confidence and mechanistic de-risking at key discovery inflection points.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables real-time observation of cellular responses to perturbations without labeling artifacts.
- Supports functional target validation by tracking subcellular dynamics such as lipid droplet movement.
- Facilitates mechanistic de-risking by providing quantitative, time-resolved data on live cells.
Screening & Assay Development
- Prepares validated live-cell systems for downstream phenotypic screening workflows.
- Delivers reproducible, quantitative imaging outputs suitable for assay standardization.
- Enables high-content screening readiness by supporting long-term, automated acquisition.
Translational & Preclinical Research
- Aligns imaging conditions with physiological relevance for translational biomarker studies.
- Supports continuity from discovery through preclinical validation by enabling longitudinal cell tracking.
- Provides predictive value for disease-relevant cellular processes such as lipid metabolism.
Pipeline & Workflow Integration
This flexible chamber system integrates into the discovery-to-preclinical continuum by enabling robust, time-lapse SRS imaging on standard upright microscope frames.
- Discovery Biology: Supports hypothesis testing and pathway clarification by visualizing dynamic molecular events in live cells.
- Screening: Provides assay-ready, reproducible imaging outputs for compound evaluation.
- Analytics: Generates quantitative measurements such as lipid droplet area ratios and SRS intensity for comparative analysis.
- Translational Research: Maintains physiological conditions to ensure disease-relevant data continuity.
- Enterprise Reuse: Adaptable to existing SRS setups and compatible with other upright microscopy platforms.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in live-cell studies.
- Operational Value: Standardizes environmental control for reproducible, scalable imaging workflows.
- Strategic Value: Improves go/no-go decision quality and capital efficiency by enabling robust, long-term data acquisition.
- Portfolio Impact: Supports risk-adjusted prioritization and advancement of discovery programs.
Implementation Considerations
- Requires expertise in SRS microscopy and live-cell imaging protocols.
- Needs compatible upright microscope frames and environmental control infrastructure.
- Demands cross-team standardization for chamber assembly and environmental parameter monitoring.
- Adaptable to various cell types and experimental designs with minor modifications.
- Focal drift and manual refocusing may be necessary during extended imaging sessions.
Biopharma FAQs
Why does null hypothesis testing matter for SRS lipid droplet quantification?
Null hypothesis testing enables objective evaluation of lipid droplet changes in response to treatments, supporting target validation by distinguishing true biological effects from background variability in time-lapse SRS imaging outputs.
How does independent variable isolation fit SRS chamber-based discovery?
Isolating variables such as temperature, CO2, and treatment conditions within the flexible chamber ensures that observed cellular changes are attributable to experimental interventions, increasing confidence in mechanistic findings.
What do quantitative dependent variable measurements enable in SRS imaging?
Quantitative outputs like lipid droplet area ratios and SRS intensity provide actionable data for comparing cellular responses, enabling robust assessment of compound effects and supporting data-driven decision-making in early discovery.
Why are replication requirements critical for cross-functional SRS workflows?
Replication ensures that time-lapse imaging results are reproducible across experiments and teams, facilitating reliable data sharing and collaborative validation in multi-disciplinary R&D environments.
What statistical analysis capabilities are required before SRS imaging implementation?
Teams must be equipped to perform quantitative image analysis, statistical comparisons, and significance testing on time-lapse SRS data to ensure that observed effects are robust and actionable for portfolio advancement.
