Standardize tumor sample preparation and reduce background for more accurate immunotherapy characterization.


Achieve cleaner samples with Laminar Wash technology

Enhance cell retention and viability with less debris

See example TILs data using flow cytometry

Publications and links to useful resources



Interactions of cancer cells with their environment profoundly influences tumor progression, ultimately determining whether the primary tumor metastasizes, develops dormant micrometastases, or is eradicated. Thus, the tumor microenvironment (TME) profoundly shapes therapeutic responses and resistance. Tumor-infiltrating lymphocytes (TILs) possess the unique ability to recognize, attack and penetrate tumors. As such, mechanisms that unleash the power of TILs are under investigation as potential cancer treatments. For instance, mouse and human TILs are used in the preclinical studies of immunotherapeutic agents, while other human TILs are being developed and applied into novel immunooncology methods.

Hence, TIL isolation and further characterization are of key importance in assessing treatment efficacy in various tumor types. However, the downstream processing from TME encounters a common problem. Typically, after tissue dissociation and isolation, TILs share their samples with high amounts of debris and dead cells in solution, contaminants needing stringent washing for removal. Instead of subjecting these precious TILs to the high mechanical stress of centrifugation that further impact retention, Laminar Wash technology offers a gentle alternative that can improve yield and data quality, particularly of rare cell types in samples containing low initial cell counts.


“Due to its underlying principle, the Laminar Wash (system) means less mechanical stress on cells and less cell loss from a sample, compared to conventional centrifugation steps.”

Dr. Christoph Eberle, Charles River Laboratories

Traditional Centrifugation


Laminar Flow Technology

Comparison of an immuno-staining workflow for the preparation of a single cell suspension for flow cytometry analysis. Laminar Wash technology is equally effective in washing but without the use of a centrifuge.



Tumor microenvironment and TILs isolation are difficult to prepare. Laminar Wash processing yields a clean sample while reducing hands-on time. Laminar Wash technology can:

  • Enhance cell retention
  • Improve reproducibility between operators, time, and locations
  • Improve cell viability and reduce stress on cells
  • Reduce debris, background, artifacts and clogging
  • Offer facile solutions to automate cell prep workflows
Featured Resource

WHITE PAPER: Improved sample preparation method for immuno-oncology studies

Scientific Data

Laminar Wash Technology Improves Debris Removal, TILs Retention, and Resolution Of Subpopulations


Data adapted from the Curiox Biosystems webinar by Dr. Christoph S. Eberle from the Discovery Research Services at Charles River Laboratories, Worcester, MA
Better debris removal and cell retention:

When performing cell dissociation in tumor bearing tissues, the tissue debris and enzymatic-induced fragments are primary factors affecting TILs cell recovery. For more invasive and immunologically challenging models, like B16F10-inoculated mice, recovery of limited numbers of TILs reduces the chances for accurate characterization. Here, an unchallenged mouse sample containing 1e6 TILs was prepared with Laminar Wash technology. Laminar Wash improved viable cell counts and reduced debris, compared to conventional methods. The cleaner sample preparation increases lymphocyte recovery up to 90.6%, compared to centrifuge-harsh washing of 10.5%.


Laminar Wash Technology Improves Cell Viability

Samples processed with Laminar Wash show higher viability
Splenocytes (a) and (b) and dissociated tumor cells (c) and (d) were washed with either centrifugation (manual 1 and 2) or the Laminar Wash system and viability measurements were compared. Statistical significance is reported among the manual methods vs Laminar Wash: ns = not significant, ** = P<0.01, *** = P<0.001, **** = P<0.0001. The values represent technical triplicates of the samples from an
individual naïve and an individual challenged Balb/c mouse. Manually processed samples were handled by two different analysts..

Figure adapted from Curiox Biosystems and Charles River Laboratories co-authored White Paper

Featured Resources

All you need to know about the laminar wash™ HT2000 System


Walk-Away Automation of Cell Immunostaining Assays by Centrifuge-Less Laminar Wash™


Centrifuge-less Whole Blood Staining with Laminar Wash in a Biosafety Cabinet


Integrating Centrifuge Independent and Time Efficient Automated Washing in Flow Cytometry Crossmatching

Related Products and Accessories

Laminar Wash HT2000

A reliable and easy-to-use benchtop instrument for hig-throughput flow cytometry labs.

Laminar Wash Auto 1000

Complete Automation Solution for Surface Staining and Intracellular Staining for Flow Cytometry.

Laminar Wash MINI

An affordable, benchtop instrument for low-throughput sample preparation for flow cytometry

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