New tools for quantifying and visualizing adoptively transferred cells in recipient mice.

Area of Science:

• Immunology and Cell Biology
• Transplantation Research
• Mouse Models in Research

Background:

• Adoptive transfer of donor cells is a key technique in lymphocyte research.
• Accurate quantification and visualization of transferred cells are crucial for understanding their function and metabolism.
• Existing methods require refinement for robust application in mouse models.

Purpose of the Study:

• To evaluate novel methods for quantifying adoptively transferred cells in recipient mouse tissues.
• To assess the effectiveness of real-time PCR and fluorescence labeling for tracking donor cells.
• To compare different genetic and labeling strategies for cell detection.

Main Methods:

• Spleen cells from beta-galactosidase (LacZ) transgenic mice were adoptively transferred into wild-type female mice.
• Real-time PCR was used to quantify donor cell accumulation via LacZ or SRY gene amplification.
• Donor cells were labeled with Green Fluorescent Protein (GFP) or CellTracker Orange for visualization via microscopy.

Main Results:

• Real-time PCR showed consistent donor cell clearance and recruitment across tissues using LacZ or SRY gene targets.
• Significant variations in PCR amplification efficiency were observed across different recipient tissues.
• CellTracker Orange labeling allowed detection by conventional fluorescence microscopy, unlike GFP, and did not affect cell behavior.

Conclusions:

• Real-time PCR is a robust method for quantifying adoptively transferred cells, but tissue-specific DNA amplification differences must be considered.
• CellTracker Orange provides a reliable method for visualizing transferred cells using conventional microscopy without impacting cell dynamics.
• These optimized protocols enhance the study of lymphocyte function and metabolism through improved cell tracking in mouse models.