NCI Drug Dictionary

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The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

HSV-TK-transduced donor lymphocytes
A preparation of donor lymphocytes transduced with the "suicide" gene herpes simplex virus thymidine kinase (HSV-TK) with potential immunomodulating activity. Administration of HSV-TK-transduced lymphocytes after T cell-depleted allogeneic stem cell transplantation allows an early controllable immune reconstitution, which takes advantage of the antitumor effect of donor lymphocytes and helps to mitigate the risk of post-transplant opportunistic infection. To control graft-versus-host disease (GvHD) due to donor lymphocyte infusion, HSV-TK-transduced donor lymphocytes are selectively eliminated by administration of the antiviral agent ganciclovir. Ganciclovir, a prodrug, is readily phosphorylated by the suicide gene HSV-TK within HSV-TK-transduced lymphocytes to its monophosphate form and, subsequently, converted into its active triphosphate form, which specifically kills HSV-TK- transduced donor lymphocytes. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
Synonym:HSV-TK-engineered donor lymphocytes