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Potentiation of Cytotoxicity With Interferon Gamma

Douglas E. Dawson, MD; Markus Gapany, MD; Robert C. Burgess, MD; Peter V. Boesen, MD; Don B. Headley, MD

Arch Otolaryngol Head Neck Surg. 1992;118(11):1168-1171.

Abstract
• This study examined combinations of the recombinant human cytokines, tumor necrosis factor and interferon gamma, with doxorubicin and dactinomycin as well as other drugs on six squamous cell carcinoma cell lines of head and neck origin using the 3(4,5-dimethylthiazol-2-yl)2,5-diphenyl-tetrazolium bromide proliferation assay. Interferon gamma significantly enhanced the cytotoxicity of tumor necrosis factor a with dactinomycin on all six cell lines investigated, while in four of six cell lines the cytotoxicity of tumor necrosis factor with doxorubicin was significantly augmented by interferon gamma. Additional experiments showed no effect with either cytokine in combination with cisplatin, fluorouracil, methotrexate, or etoposide. These data demonstrate that human recombinant cytokines in concert with certain drugs improve in vitro cytotoxicity and may have a potential for improving in vivo therapy.

(Arch Otolaryngol Head Neck Surg. 1992;118:1168-1171)

Author Affiliations
From the Otologic Medical Services of Iowa City (Iowa) (Dr Dawson), and the Department of Otolaryngology Head and Neck Surgery (Drs Gapany, Burgess, Boesen, and Headley), University of Iowa Hospitals and Clinics, Iowa City.

Footnotes
Accepted for publication July 10, 1992.

Reprint requests to 540 E Jefferson St, Suite 401, Iowa City, IA 52245 (Dr Dawson).

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