Related Experiment Videos
A method for the determination of the adherence of granulocytes to microtitre plates
Abstract:
We report a new partially automated method for the measurement of the adherence of PMN in vitro. Adherence to a plastic surface was detected by measuring leukocyte alkaline phosphatase activity of the adherent cells, with a Titertek Multiscan system. Using three different cellular concentrations (1 X 10(6), 5 X 10(5), 2.5 X 10(5) PMN/ml) the response curve was linear to 45 min and adhesion was maximal by 30 min. The specificity of the reaction was acceptable as was the assay reproducibility (intra-assay coefficient of variation less than 8%; inter-assay coefficient of variation less than 11%).
Insights
This study introduces a new, partially automated method to measure polymorphonuclear leukocyte (PMN) adherence in vitro. The assay is reproducible and specific, with maximal adhesion observed within 30 minutes.
Area of Science:
- Biomedical Science
- Cell Biology
- Immunology
Background:
- Accurate measurement of polymorphonuclear leukocyte (PMN) adherence is crucial for understanding inflammatory responses.
- Existing methods for assessing PMN adherence may lack automation or require complex procedures.
Purpose of the Study:
- To develop and validate a novel, partially automated method for quantifying PMN adherence to plastic surfaces in vitro.
- To establish the kinetic parameters and assess the reproducibility and specificity of the new assay.
Main Methods:
- A partially automated system utilizing a Titertek Multiscan reader was employed.
- Leukocyte alkaline phosphatase (LAP) activity of adherent PMNs was measured to quantify adherence.
- Experiments were conducted using three distinct PMN concentrations (1 X 10(6), 5 X 10(5), and 2.5 X 10(5) cells/ml).
Main Results:
- The assay demonstrated a linear response curve for PMN adherence up to 45 minutes.
- Maximal PMN adhesion to the plastic surface was achieved by 30 minutes.
- The method exhibited acceptable specificity and assay reproducibility, with intra-assay and inter-assay coefficients of variation below 8% and 11%, respectively.
Conclusions:
- The developed partially automated method provides a reliable and efficient means for measuring PMN adherence in vitro.
- This assay is suitable for research applications requiring quantitative assessment of PMN adhesion kinetics and reproducibility.