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Kirsi Pekkola-Heino, MD; Jarmo Kulmala, PhLic; Reidar Grenman, MD

Arch Otolaryngol Head Neck Surg. 1992;118(12):1312-1315.

Abstract
• Chemoradiotherapy has been considered one of the most promising improvements in the treatment of advanced head and neck cancer. This article describes in vitro chemosensitivity to carboplatin in five squamous cell carcinoma cell lines established from head and neck cancers and in one vulvar squamous cell carcinoma cell line. Sensitivity to carboplatin was found to vary markedly when using the 96-well plate clonogenic assay and continuous drug exposure. The difference in carboplatin response between the most sensitive and the most resistant cell lines was fourfold. No cross-resistance was observed between inherent radiosensitivity and chemosensitivity. Effects of concomitant use of carboplatin and radiation were further investigated in the two cell lines that were found to be most sensitive to carboplatin. The drug was administered 1 hour before acute radiation doses, and an additive effect was observed in both cell lines.

(Arch Otolaryngol Head Neck Surg. 1992;118:1312-1315)

Author Affiliations
From the Departments of Otolaryngology (Drs Pekkola-Heino and Grenman), Radiotherapy and Oncology (Dr Kulmala), and Medical Biochemistry (Dr Grenman), University of Turku (Finland).

Footnotes
Accepted for publication June 2, 1992.

Reprint requests to Department of Otolaryngology, Turku University Central Hospital, SF-20520 Turku, Finland (Dr Grenman).

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