(AL-des-LOO-kin) 
A drug used to treat adults with melanoma or renal cell carcinoma (a type of kidney cancer) that has spread to other parts of the body. It is also being studied in the treatment of other types of cancer. Aldesleukin is a form of interleukin-2 that is made in the laboratory. Aldesleukin increases the activity and growth of white blood cells called T lymphocytes and B lymphocytes, which may help the immune system kill cancer cells. Aldesleukin is a type of cytokine and a type of immunomodulating agent. Also called Proleukin and recombinant human interleukin-2.