Increased levels of soluble ST2 protein and IgG1 production in patients with sepsis and trauma.

Objective: T1/ST2, a member of the interleukin (IL)-1 receptor superfamily, is predominantly expressed on type-2 T helper (Th2) cells but not Th1 cells, and plays a role in cell proliferation and Th2 immune response. The relation of soluble ST2, Th1-Th2 cytokine profile, and immunoglobulin (Ig) production in sepsis and trauma patients is not well known.

Design And Setting: Case-control study at a university hospital intensive care unit.