A simple rapid method for detection of IL-2 in a physiological medium.

Area of Science:

• Immunology
• Cell Biology

Background:

• Hydrocortisone inhibits T-cell proliferation.
• Splenic cell supernatants can restore T-cell function.

Purpose of the Study:

• To investigate the mechanism of hydrocortisone-induced T-cell inhibition.
• To identify the factor responsible for restoring T-cell reactivity.
• To develop a method for detecting Interleukin-2 (IL-2).

Main Methods:

• T-cell proliferation assays using C57BL/6 mice thymus cell suspension.
• Stimulation with Concanavalin A (Con A).
• Treatment with hydrocortisone and splenic cell supernatants.

Main Results:

• Hydrocortisone completely blocked Con A-activated thymocyte proliferation.
• Supernatant from Con A-activated splenic cells restored proliferation.
• Heating destroyed the restoring activity, while IL-1 did not restore it.
• Indomethacin-treated splenic cell supernatant enhanced restoration, and PGE inhibited it, supporting IL-2's role.

Conclusions:

• Interleukin-2 (IL-2) is responsible for restoring hydrocortisone-inhibited thymocyte proliferation.
• The study developed a semi-quantitative method for IL-2 detection in physiological media.