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A CTL assay requiring only 150 microliter of mouse blood
H Swiniarski1, K Sturmhoefel, K Lee
1Department of Molecular Medicine, Genetics Institute, One Burtt Road, Andover, MA, USA.
Insights
This study introduces a novel method to measure antigen-specific cytotoxic T lymphocyte (CTL) activity in mice without sacrificing the animals. The assay uses peripheral blood cells, offering a more efficient way to study CTL responses in vivo.
Area of Science:
- Immunology
- Cellular immunology
- In vivo studies
Background:
- Cytotoxic T lymphocyte (CTL) activity is crucial for adaptive immunity.
- Traditional methods for measuring CTL activity often require animal sacrifice, limiting longitudinal studies.
- Assessing antigen-specific CTL responses is vital for vaccine development and immunotherapy research.
Purpose of the Study:
- To develop a non-lethal method for measuring antigen-specific CTL activity in mice.
- To establish a sensitive and efficient assay for quantifying CTL responses from peripheral blood.
- To enable longitudinal monitoring of CTL activity within individual mice during in vivo studies.
Main Methods:
- Peripheral blood cells from mice were stimulated in vitro with antigens, cytokines, costimulatory molecules, and feeder cells.
- Cells were cultured for 7 days under limiting dilution conditions.
- Antigen-specific CTL activity was detected via a measurable signal.
Main Results:
- A highly sensitive and antigen-specific assay for CTL activity was established.
- The assay allows for measurement without the need for animal sacrifice.
- The method is more efficient than conventional CTL assays, increasing throughput.
Conclusions:
- This novel assay provides a non-invasive and efficient approach to measure antigen-specific CTL activity in mice.
- The ability to assay blood samples longitudinally from the same mouse strengthens correlative studies.
- This method facilitates a deeper understanding of CTL responses in various in vivo contexts.
Abstract:
In this paper, we present a method for measuring antigen specific cytotoxic T lymphocyte (CTL) activity from individual mouse peripheral blood samples without animal sacrifice. Peripheral blood cells are stimulated in vitro with a cocktail of antigen, cytokines, costimulatory molecules and irradiated feeder cells resulting, 7 days later, in a readily detectable antigen specific signal from a well plated under limiting dilution conditions. This highly sensitive and antigen specific assay is more efficient than conventional CTL assays and thus increases the number of mice that can be tested in a single assay. Since blood samples can be assayed from an individual mouse at multiple times during the course of an in vivo study, the assay can facilitate and strengthen correlative studies on CTL responses and in vivo results.