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  • Title: Single-chain immunotoxins targeted to CD40 for the treatment of human B-lineage hematologic malignancies.
    Author: Francisco JA, Siegall CB.
    Journal: Leuk Lymphoma; 1998 Jul; 30(3-4):237-45. PubMed ID: 9713956.
    Abstract:
    Immunotoxins, in chemical conjugate form, have shown limited efficacy in clinical trials in patients with hematologic malignancies. Single-chain immunotoxins (SCIT) provide for enhanced therapeutic efficacy over chemical conjugate forms without additional toxicity and thus may result in improved antitumor activity. We have evaluated two SCITs targeted to CD40, a receptor expressed on most B-lineage hematologic malignancies, for the treatment of non-Hodgkin's lymphoma and multiple myeloma. Both SCITs, G28-5 sFv-PE40 and BD1-G28-5 sFv, were highly potent and specifically cytotoxic against non-Hodgkin's lymphoma and multiple myeloma cell lines. G28-5 sFv-PE40 has proven to be efficacious in SCID mice bearing human non-Hodgkin's lymphoma and multiple myeloma xenografts. Antitumor activity has also been noted in preliminary studies using BD1-G28-5 sFv in non-Hodgkin's lymphoma models. The data presented here indicate that these agents should be considered for use in clinical trials in patients with refractive non-Hodgkin's lymphoma, multiple myeloma and other CD40-expressing hematologic malignancies.
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