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  • Title: Continuous infusion of T101 monoclonal antibody in chronic lymphocytic leukemia and cutaneous T-cell lymphoma.
    Author: Dillman RO, Beauregard J, Shawler DL, Halpern SE, Markman M, Ryan KP, Baird SM, Clutter M.
    Journal: J Biol Response Mod; 1986 Oct; 5(5):394-410. PubMed ID: 3490543.
    Abstract:
    We report results of 24-h continuous infusions of murine monoclonal antibody T101 in six patients with chronic lymphocytic leukemia (CLL), and 10 with cutaneous T-cell lymphoma (CTCL), at doses of 10, 50, 100, or 500 mg. Similar side-effects were seen in CLL and CTCL, including direct toxic effects of therapy, such as fever, sweats, and chilling, and a 30% frequency of allergic manifestations. In vivo binding of T101 to target cells in blood, skin, lymph nodes, tumor masses, and bone marrow was demonstrated. Antigenic modulation occurred rapidly in all cases, and persisted throughout the infusion period. Peak serum T101 levels for equivalent doses were somewhat higher, and persisted longer in CTCL, perhaps because of differences in the number of circulating target cells. Antimouse antibodies were demonstrated in 5 of 10 CTCL vs. 0 of 6 CLL patients. In all five cases, there was a substantial component of T101 specificity in the antimouse response. Brief objective clinical responses were observed in 4 of 10 CTCL and 2 of 6 CLL patients. Acute anti-tumor effects of T101 were substantially more dramatic in CTCL than CLL, but appeared limited by antigenic modulation and the emergence of antimouse antibodies. In view of the in vivo binding and modulation, more durable anti-tumor effects may be achievable with cytotoxic immunoconjugates of this monoclonal antibody.
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