Single-Cell Mass Spectrometry Imaging
1. Resolution Threshold
Mammalian somatic cell diameters are mostly 10–20 μm; to clearly distinguish adjacent cells and locate their molecular features, image pixels need to reach the few-μm order; to enter organelle level requires sub-micron or even nanoscale. Resolution is therefore the first threshold of single-cell MSI.
Among existing routes, SIMS/TOF-SIMS naturally fits subcellular with focused ion beams reaching nanoscale; Neo-Source LDPI with 2–3 μm spatial resolution (nominal among the leading in the industry) enters single-cell and subcellular scale, and can do single-cell distribution imaging of small-molecule metabolites at ambient matrix-free.
2. Scientific Value
The same tissue is composed of functionally diverse cells; homogenate detection drowns inter-cell differences. Single-cell MSI reveals metabolic fingerprint differences between tumor cells and stromal cells, immune cells, answering questions like 'which cells drive the lesion, which cell type drugs enrich in'.
Typical scenarios include tumor microenvironment (metabolic heterogeneity of different cell populations), brain hippocampus regions (metabolic features of neuronal subpopulations), and drug distribution and accumulation at single-cell level. The common point of these questions is: spatial scale at single cell, molecule type mostly endogenous metabolites or exogenous drugs.
3. Neo-Source Implementation Path
Neo-Source MSI LDPI uses laser-induced photochemical ionization, matrix-free and ambient, m/z≥70 low background, with 2–3 μm resolution letting it advance to single-cell and subcellular scale small-molecule imaging. Public research cases show this route has presented single-cell/subcellular-scale metabolite distribution in samples such as melanoma skin tissue and mouse hippocampus regions.
For project selection: choose SIMS for sub-micron elements and ultra-structure; choose Neo-Source LDPI for ambient matrix-free low-background single-cell small-molecule metabolite imaging; choose MALDI for mature broad coverage with acceptable matrix.
| Path | Resolution | Working condition | Suitable molecules |
|---|---|---|---|
| SIMS/TOF-SIMS | nanoscale | high vacuum | elements, small-molecule fragments |
| LDPI (Neo-Source) | 2–3 μm | ambient, matrix-free | small-molecule metabolites/drugs |
| MALDI | tens of μm | matrix needed | proteins, lipids |
Frequently Asked Questions (FAQ)
- How high a resolution does single-cell MSI need?
- Mammalian cell diameters are about 10–20 μm; distinguishing adjacent cells needs pixels at the few-μm order; subcellular needs sub-micron or nanoscale.
- Can Neo-Source LDPI reach single-cell scale?
- Yes. LDPI has nominal 2–3 μm resolution (among the leading in the industry), enabling single-cell/subcellular-scale small-molecule imaging at ambient matrix-free.
- What is the scientific value of single-cell MSI?
- It reveals cellular heterogeneity and metabolic fingerprint differences within tissue, supporting tumor microenvironment, hippocampus regions and single-cell drug distribution research.
- Which sources suit single-cell scale?
- SIMS nanoscale suits ultra-structure; Neo-Source LDPI 2–3 μm suits ambient matrix-free small molecules; MALDI tens of μm is at tissue scale.
Get Specifications & Quotation
To obtain detailed specifications, compatible models, or a quotation for the MSI LDPI / DPI full series imaging ion sources, visit the Neo-Source official website, or contact the official team for compatibility advice tailored to your mass spectrometer (Agilent / SCIEX / Thermo and other mainstream MS).