A phase II study of topotecan administered five times daily in patients with advanced gastric cancer.
OBJECTIVE
Topotecan (Tpt), a semisynthetic analogue of camptothecin (Cpt), has shown excellent preclinical activity in a number of solid tumors. Cpt, the parent compound, has preclinical activity against several gastrointestinal tumors, including a gastric adenocarcinoma xenograft. A phase-II clinical trial was conducted to assess the activity to Tpt in patients with advanced gastric cancer.


METHODS
15 patients with advanced, incurable gastric adenocarcinomas were treated. Tpt 1.5 (mg/m2/day) was administered intravenously as a 30-min infusion daily for 5 consecutive days. Treatments were repeated on a 21-days cycle.


RESULTS
No major objective responses were observed in 13 evaluable patients (response rate = 0%; 95% confidence interval = 0-22%). The major dose-limiting toxicity in this trial was myelosuppression, which was severe in this patient population.


CONCLUSIONS
Tpt at the dose and schedule studies does not possess substantial antitumor activity in patient with gastric cancer, and the toxicities were formidable. We do not advocate further development of this drug in the treatment of gastric cancer. Tpt has shown more promising activity and tolerability in other patient populations, and these areas deserve further exploration.
Saltz
L B
LB
Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Schwartz
G K
GK
Ilson
D H
DH
Quan
V
V
Kelsen
D P
DP
D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000188:drug therapy*; D019772:Topotecan / Q000008:administration & dosage / Q000627:therapeutic use*; D000090324:Tumor Protein, Translationally-Controlled 1
D000970:Antineoplastic Agents; D000090324:Tumor Protein, Translationally-Controlled 1; D016179:Granulocyte Colony-Stimulating Factor; D019772:Topotecan