animal studies

Pharmacokinetic properties of radiolabeled mutant Interleukin-2v. A PET imaging study

Interleukin-2 (IL2) is a cytokine that can stimulate cytotoxic immune cells to attack infected and malignant cells. Unfortunately, IL2 can also cause serious immune-related toxicity. Recently, a mutant of IL2 (IL2v) with abolished CD25 binding, increased plasma half-life and less toxicity was engineered. Unlike wild-type IL2 (wt-IL2), mutant IL2v does not bind to the ?-subunit (CD25) of the high affinity IL2??? receptor, but only to its ? and ? subunit. Here, we investigated the biological properties of IL2v and compared with the wt-IL2 using fluorine-18 and PET.

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