Phase I and pharmacologic study of CT-2584 HMS, a modulator of phosphatidic acid, in adult patients with solid tumours.
CT-2584 HMS, 1-(11-dodecylamino-10-hydroxyundecyl)-3, 7-dimethylxanthine-hydrogen methanesulphonate, is a modulator of intracellular phosphatidic acid. We treated 30 patients as part of a Phase I and pharmacokinetic study to determine the maximum-tolerated dose of CT-2584 HMS, toxicity profiles, pharmacokinetic profile and antitumour effects at escalating dose levels. CT-2584 HMS was given as a continuous infusion for 6 hours for 5 consecutive days every 3 weeks. Plasma samples for pharmacokinetic studies were analysed using a validated high-performance liquid chromatographic assay. Mean C(max)and AUC values for each dose group were similar on days 1 and 5 and increases in plasma concentration (C(max)and AUC) appeared proportional to the dose. CT-2584 HMS had a mean elimination half-life of 7.3 hours. Values of V(d)and clearance were independent of dose and duration of treatment. Dose escalation was halted at 585 mg/m(2)because of malaise and lethargy, which was sometimes accompanied by nausea and headache. 26 patients were evaluable for response, one patient with pleural mesothelioma achieved a partial response to treatment confirmed by CT scanning. A dose level of 520 mg/m(2)daily x 5 days would be suitable for Phase II testing. Alternative schedules of CT-2584 HMS to overcome the limiting toxicity of malaise would be worthy of examination.
Cheeseman
S L
SL
CRC Department of Medical Oncology, Christie Hospital NHS Trust, Manchester, UK.
Brannan
M
M
McGown
A
A
Khan
P
P
Gardner
C
C
Gumbrell
L
L
Dickens
D
D
Ranson
M
M
D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000009:adverse effects / Q000493:pharmacokinetics* / Q000627:therapeutic use; D019540:Area Under Curve; D001145:Arrhythmias, Cardiac / Q000139:chemically induced; D004305:Dose-Response Relationship, Drug; D005221:Fatigue / Q000139:chemically induced; D005260:Female; D006417:Hematuria / Q000139:chemically induced; D006801:Humans; D006967:Hypersensitivity / Q000209:etiology; D007022:Hypotension / Q000139:chemically induced; D007262:Infusions, Intravenous; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000139:chemically induced; D009325:Nausea / Q000139:chemically induced; D009369:Neoplasms / Q000097:blood / Q000188:drug therapy*; D010712:Phosphatidic Acids / Q000378:metabolism*; D011507:Proteinuria / Q000139:chemically induced; D016896:Treatment Outcome; D014839:Vomiting / Q000139:chemically induced; D014970:Xanthines / Q000009:adverse effects / Q000493:pharmacokinetics* / Q000627:therapeutic use
D000970:Antineoplastic Agents; D010712:Phosphatidic Acids; D014970:Xanthines; C106011:CT 2584