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Topotecan in the first-line treatment of small cell lung cancer.

Abstract
Small cell lung cancer (SCLC) is generally sensitive to first-line chemotherapy, but limited disease often recurs and extensive disease is rarely curable. The most common first-line therapy regimen is cisplatin (Platinol; Bristol-Myers Squibb; Princeton, NJ) plus etoposide (Etopophos; Bristol-Myers Squibb)--PE, which is associated with overall response rates >80% in patients with limited SCLC. Although it is associated with median survival times of approximately 18-20 months for limited disease, PE yields median survival times of only approximately 8-12 months in patients with extensive disease, and symptom palliation becomes the primary therapeutic goal. The toxicities of PE may undermine quality of life and leave patients more susceptible to adverse events during subsequent therapies. Topotecan (HYCAMTIN; GlaxoSmithKline; Philadelphia, PA), an established treatment for recurrent SCLC, is being investigated in the first-line setting because of its novel mechanism of action; predictable, noncumulative, and manageable toxicities; and potential synergy with other active agents. Several recent phase II trials have generated promising results for topotecan-based combination regimens, including topotecan/paclitaxel (TAXOL; Bristol-Myers Squibb) (overall response rates 45%-100%), topotecan/etoposide (overall response, 95%), and topotecan, paclitaxel, and platinum agent triplets (overall response rates 51%-93%). The most frequent serious toxicity associated with these regimens was reversible and noncumulative neutropenia, which was generally manageable with supportive care. Additional clinical trials to investigate topotecan-based combination regimens and confirm their role in the first-line treatment of SCLC are under way.
AuthorsDavid J Stewart
JournalThe oncologist (Oncologist) Vol. 9 Suppl 6 Pg. 33-42 ( 2004) ISSN: 1083-7159 [Print] England
PMID15616148 (Publication Type: Journal Article, Review)
Chemical References
  • Antineoplastic Agents
  • Topotecan
Topics
  • Antineoplastic Agents (therapeutic use)
  • Antineoplastic Combined Chemotherapy Protocols (therapeutic use)
  • Carcinoma, Small Cell (drug therapy)
  • Humans
  • Lung Neoplasms (drug therapy)
  • Topotecan (administration & dosage, therapeutic use)

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