Summary
Sixteen evaluable patients with metastatic breast cancer were entered into a phase II trial of didemnin B. They received the drug at an initial dose of 5.6 mg/m2 every 21 to 28 days. Major toxicities noted were myalgia and nausea and vomiting while myelosuppression was mild. There were no complete responses; however, two minor responses were observed. The pharmacokinetics of didemnin B were studied in 10 patients who received the drug as 30 to 60 min i.v. infusions. A sensitive competitive inhibition enzyme immunoassay was used to quantitate didemnin B levels. Drug was observed to be rapidly cleared from plasma in a biphasic manner (t 1/2α=0.12 hr, t 1/2β=4.8 hr). Although the assay could not identify the presence of specific metabolites, the increase of apparent didemnin B levels in plasma at later time points suggested the formation of unidentified metabolites which cross reacted with the antibody in the analytical procedure.In vitro experiments indicated that didemnin B was not bound to bovine serum albumin and only a minor portion (24%) of drug was found associated with red blood cells.
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Rinehart KL Jr, Gloer JB, Hughes RG Jr, Renis HE, McGovern JP, Swynenberg EB, Stringfellow DA, Kuentzel SL, Li LH: Didemnins: Antiviral and antitumor depsipeptides from a Caribbean tunicate. Science 212:933, 1981
Chun HG, Davies B, Hoth D, Suffness M, Plowman J, Flora K, Grieshaber C, Leyland-Jones B: Didemnin B The first marine compound entering clinical trials as an antineoplastic agent. Invest New Drugs 4:279, 1986
Rinehart KL Jr, Gloer JB, Wilson GR, Hughes RG Jr, Li LH, Renis HE, McGovern JP: Antiviral and antitumor compounds from tunicates. Fed Proc 42:86, 1983
LeGrue SJ, Sheu T-L, Carson DD, Laidlaw JL, Sanduja SK: Inhibition of T-lymphocyte proliferation by the cyclic polypeptide didemnin B: No inhibition of lymphokine stimulation. Lymphokine Res 7:21, 1988
Fimiani V:In vivo effect of didemnin B on two tumors of the rat. Oncology 44:42, 1987
Crampton SL, Adams EG, Kuentzel SL, Li LH, Badiner G, Bhuyan BK: Biochemical and cellular effects of didemnins A and B. Cancer Res 44:1796, 1984
Li LH, Timmins LG, Wallace TL, Krueger WC, Prairie MD, Im WB: Mechanism of action of didemnin B, a depsipeptide from the sea. Cancer Lett 23:279, 1984
Dorr FA, Kuhn JG, Phillips J, von Hoff DD: Phase I clinical and pharmacokinetic investigation of didemnin B, a cyclic depsipeptide. Eur J Cancer Oncol 24:1699, 1988
Shin DM, Holoye PY, Murphy WK, Forman A, Papasozomenus S, Jones E, Raber MN, Hong WK: Phase I clinical trial of didemnin B (NSC-325319:DN-B) in nonsmall cell lung cancer (NSCLC); Neuromuscular toxicity is dose-limiting. Proc Amer Soc Clin Oncol 10:95, 1991
Raybould TJG, Grothaus PG, Simpson SB, Bignami GS, Lazo CB, Newman RA: An enzyme immunoassay for determining plasma concentrations of didemnin B. J Clin Lab Analysis (in press)
Wagner JG: Linear pharmacokinetic equations allowing direct calculation of many needed pharmacokinetic parameters from the coefficients and exponents of polyexponential equations which have been fitted to the data. J Pharmacokin Biopharm 4:43, 1976
Jiang TL, Liu RH, Salmon SE: Antitumor activity of didemnin B in the human tumor stem cell assay. Cancer Chemother Pharmacol 11:1, 1983
Phillips JL, Schwartz R, von Hoff DD:In vitro distribution of diacetyl didemnin B in human blood cells and plasma. Cancer Invest 7:123, 1989
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Benvenuto, J.A., Newman, R.A., Bignami, G.S. et al. Phase II clinical and pharmacological study of didemnin B in patients with metastatic breast cancer. Invest New Drugs 10, 113–117 (1992). https://doi.org/10.1007/BF00873128
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DOI: https://doi.org/10.1007/BF00873128