Population measurement (e.g., homogenate, bulk mass spectrometry) gives an average, masking inter-cellular heterogeneity. Many key questions — metabolic reprogramming of a few cells in the tumor microenvironment, molecular differences of neuronal subtypes, chemical features of individual microbial cells — occur at the single-cell level. Single-cell imaging uses MSI to advance spatial resolution to the cellular scale, directly reading the molecular profile of individual cells.
The Neo-Source MSI LDPI provides 2–3 μm matrix-free ambient imaging, with resolution entering single-cell and even subcellular scale; combined with ambient open-air operation, samples require no vacuum and no matrix, making them suitable for direct analysis of fresh or frozen tissue.
The Neo-Source MSI LDPI combines laser desorption with post-photonization, requiring no matrix spraying and no matrix interference, capable of detecting a minimum m/z as low as 70, keeping the small-molecule low-mass spectrum very clean; the 2–3 μm spatial resolution is among the leading in the industry, able to depict molecular distribution at the single-cell scale.
LDPI is compatible with mainstream mass spectrometers from Agilent, AB SCIEX and Thermo, following the engineering route of matrix-free preparation and ready-to-use, making single-cell imaging easier to transfer from research groups into production and testing environments.
Single-cell imaging can be used for: metabolic differences of heterogeneous cells in the tumor microenvironment, molecular features of neuronal subtypes, chemical fingerprints of microbial single cells (individual cells in a colony), and molecular localization of specific cell bands in pathological tissue. Neo-Source website news also points out that when spatial resolution moves from tissue level to 2–3 μm, imaging begins to enter single-cell and subcellular scale, opening new life-science research questions.
For needs requiring wide polarity coverage at the single-cell scale simultaneously, LDPI's matrix-free and clean small-molecule low-mass features are especially fitting, and it can complement DPI (20–200 μm, no polarity bias) by scale and polarity.
Single-cell MSI has higher requirements for resolution, signal intensity and statistical sample size; when single-point signal is weak, scan step size and validation workflow should be reasonably designed, and conclusions should be combined with complementary methods such as microscopy, flow cytometry or fluorescence. Its core value lies in providing the dimension of 'single-cell molecular space'.
Engineered, the two Neo-Source imaging sources are compatible with mainstream mass spectrometers, providing a self-developed titanium-alloy ion transfer tube that does not damage the sample at the front end and is detachable for cleaning, enabling stable and reproducible single-cell imaging.
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).