Laser Capture Microdissection (LCM) Service
High-Precision Tissue Analysis with LCM
Bulk tissue lysis averages molecular signals, often obscuring the contribution of rare cell populations or specific morphological structures. Laser Capture Microdissection (LCM) is a cutting-edge technology that allows for the precise isolation of specific cells or regions from tissue samples. By combining the power of high-resolution imaging and laser cutting, LCM provides unparalleled accuracy in capturing target cells while preserving the integrity of their molecular makeup. This service is integral to advancing research in cancer biology, neuroscience, immunology, and more.
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- Overview
- Workflow
- Downstream
- Applications
- LCM vs Spatial Technologies
- Why choose
- FAQs
What is Laser Capture Microdissection (LCM)
LCM is a sample preparation technology that bridges the gap between histology and molecular analysis. It enables researchers to define a precise Region of Interest (ROI)—ranging from a single rare cell to a complex multicellular structure—and physically isolate it from the surrounding tissue. By creating a pure, homogeneous sample from a heterogeneous tissue section, LCM ensures that downstream data (RNA, DNA, or Protein) reflects only the specific biological phenotype you intend to study, eliminating the "noise" of surrounding stroma or necrotic tissue.
How LCM Works: A Step-by-Step Process
The process of Laser Capture Microdissection involves a delicate yet highly efficient workflow that enables precise sample collection from tissue sections. The process starts with sample preparation, where tissues are collected, fixed, and sectioned into thin slices—typically 5-10 microns in thickness. These slices are then mounted on specially treated slides that allow for optimal tissue adhesion and visualization.
Once the tissue slices are ready, high-powered imaging systems take center stage. Through the use of fluorescence microscopy, researchers can visualize specific biomarkers that have been highlighted through staining techniques. This allows them to pinpoint the exact location of target cells or tissue regions. Whether using immunofluorescence or brightfield staining, the goal is to digitally delineate the precise region of interest (ROI). This digital outline serves as the map for the laser, ensuring only the specifically selected cells are targeted.
When the target area is identified, the cutting-edge laser system comes into play. The finely focused laser dissects the tissue, isolating the selected cells or regions. The precision of this technique is key—it ensures that the cells are removed without affecting their molecular makeup. Once cut, the tissue fragments are captured onto a polymer membrane or transparent resin (PEN/PET membrane slides), preserving them for downstream molecular analysis. This method provides high-quality, uncontaminated samples ready for further study.
Downstream Analysis
Our extraction protocols are validated for picogram-range inputs, ensuring success even with limited captured material.
| Application | Target Molecule | Minimum Requirement (Approx.)* | Methodologies Supported |
|---|---|---|---|
| Transcriptomics | Total RNA / mRNA | ~100–500 cells | RNA-Seq (Smart-seq2, ultra-low input kits), scRNA-Seq, qPCR, Microarrays. |
| Genomics | gDNA | ~50–200 cells | WGS, WES, SNP Genotyping, CNV Analysis, Methylation Profiling. |
| Proteomics | Proteins / Peptides | ~1,500+ cells (>1mm2) | Spatial Proteomics, Reverse Phase Protein Arrays (RPPA), Western Blotting. |
Note: Minimum requirements vary based on tissue type (cellularity) and specific library prep kit sensitivity.
Applications of LCM in Research
- Cancer Research
LCM is invaluable in cancer research, where tumors exhibit significant heterogeneity. It allows researchers to dissect distinct regions within the tumor microenvironment, isolating cancer cells, stromal cells, and immune cells. By profiling each cell type independently, LCM facilitates the identification of biomarkers, understanding tumor progression, and investigating therapeutic responses.
- Neuroscience
In neurobiology, LCM is used to isolate specific neurons or brain regions from tissue sections, enabling researchers to study gene expression, protein function, and neuronal signaling pathways at a cellular level. This spatially resolved approach is essential for understanding neurodegenerative diseases, developmental processes, and brain function.
- Immunology
LCM enables the dissection of immune cell populations within tissues, such as lymph nodes or tumors. By isolating and analyzing T cells, macrophages, dendritic cells, and other immune cells, researchers gain insights into immune responses, disease mechanisms, and the impact of immunotherapies.
- Drug Development & Toxicology:
The ability to isolate specific cell populations from treated tissues allows for targeted studies of drug efficacy, toxicity, and mechanism of action. LCM facilitates the investigation of how drugs affect specific cell types in vivo, enabling better-informed decisions in the drug development pipeline.
- Spatial Omics
LCM plays a critical role in spatial omics studies, where the molecular composition of tissue is mapped in relation to its spatial architecture. By combining LCM with spatial transcriptomics, spatial proteomics, or spatial metabolomics, researchers can correlate molecular data with tissue structure, providing deep insights into complex biological processes.
Should I Choose LCM or Other Spatial Technologies?
If you are considering Laser Capture Microdissection (LCM) + downstream sequencing versus spatial transcriptomics (e.g., 10x Visium), the following may help guide your decision:
- LCM + sequencing: Ideal for deep exploration of known target regions, such as specific cell populations, lesions, or tissue microdomains. LCM allows high-resolution molecular analysis of selected areas, providing precise and quantitative information.
- Spatial transcriptomics: Best suited for global discovery, when you aim to explore the overall molecular landscape of the tissue, uncover spatial heterogeneity, or identify novel cell types.
Not sure if your sample is suitable for LCM? Contact us for a free technical consultation, and our experts will provide tailored advice based on your research needs.
Why Choose Our LCM Services?
- Expertise in Sample Handling:
Our team has extensive experience in handling diverse tissue types, ensuring high-quality sample preparation and optimal preservation for subsequent molecular analyzes. - State-of-the-Art Equipment:
We utilize cutting-edge LCM platforms equipped with high-resolution imaging systems and precision laser cutting capabilities, ensuring accurate, reproducible results. - Comprehensive Downstream Analysis:
Beyond dissection, we offer a range of molecular analyzes, including RNA-Seq, proteomics, and metabolomics, enabling you to generate detailed molecular profiles from your captured tissue. - Customizable Solutions:
Whether you're studying cancer, neuroscience, immunology, or other complex biological questions, we offer tailored LCM services to meet the specific needs of your research project. - Reliable and High-Quality Results:
With a focus on accuracy and reproducibility, our LCM services ensure that your research is built on robust, high-quality molecular data, advancing your scientific discovery.
FAQs
Q: How do you mitigate RNA degradation during the staining and dissection process?
A: We minimize degradation by employing rapid, dehydration-based staining protocols (under 5 minutes) and keeping all instrumentation in RNase-free, humidity-controlled environments. Strictly limiting the "on-instrument" time per slide ensures that labile molecules remain intact and hydrolysis is minimized during the excision process.
Q: What is the optimal tissue thickness for LCM?
A: 5–8 μm: Ideal for single-cell isolation and high-precision separation of adjacent structures.
10–12 μm: Better for maximizing yield per area for bulk tumor enrichment, but reduces optical resolution.
>15 μm: Generally discouraged as the laser may not cut completely through, leading to incomplete capture.
Q: How do you validate the purity of the dissected population?
A： Pre/Post-Dissection Imaging: We provide high-resolution images of the slide before and after excision to verify that the target ROI is removed and surrounding tissue is intact.
Cap Inspection: We image the collection cap to ensure the tissue adheres correctly.
Marker Gene qPCR: Upon request, we can run a QC qPCR panel to test for the enrichment of target-specific markers and the absence of background markers.
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