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Standardisation of the mixed lymphocyte reaction
Journal of Immunological Methods
|January 1, 1976
Summary
This study optimized the mixed lymphocyte reaction (MLR) for reliable immune cell analysis. The enhanced protocol provides a reproducible method for assessing cellular immune responses, crucial for transplant compatibility and disease research.
Area of Science:
- Immunology
- Cellular Biology
Background:
- The mixed lymphocyte reaction (MLR) is a key assay for evaluating T-cell mediated immune responses.
- Optimizing MLR protocols is essential for accurate and reproducible results in immunological research and clinical diagnostics.
Purpose of the Study:
- To optimize the mixed lymphocyte reaction (MLR) assay for enhanced sensitivity and reproducibility.
- To establish a standardized protocol for MLR using Ficoll-Triosil separated lymphocytes.
Main Methods:
- Lymphocytes were separated using Ficoll-Triosil gradients.
- Optimized cell numbers (100,000 responding, 100,000 stimulating) were used in TC 199 medium with 10% AB-negative serum.
- Incubation was performed at 37°C for 120 hours, followed by [3H]thymidine incorporation for 15 hours.
Main Results:
- A pool of stimulating cells from 5 normal subjects yielded a Gaussian distribution of counts per minute (CPM) from 17,000 to 88,000.
- The between-batch coefficient of variation for triplicates was 22%, indicating good reproducibility.
- A transformation index above 1.64 was determined as statistically significant for tests against single-donor stimulating cells.
Conclusions:
- The optimized MLR protocol provides a reliable and reproducible method for assessing cellular immune responses.
- This standardized assay is suitable for various immunological applications, including monitoring transplant rejection and studying immune cell function.