Anticancer Drugs. 1997 Nov;8(10):931-6.

Expression of lung resistance-related protein (LRP) in non-small cell lung carcinomas of smokers and non-smokers and its predictive value for doxorubicin resistance.

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Department of Oncological Diagnostics and Therapy, German Cancer Research Center, Heidelberg.

Abstract

Immunohistochemical methods were used to determine the expression of the lung resistance-related protein (LRP) in 87 cases of untreated non-small cell lung carcinoma. LRP expression was detected in 39 patients (45%). A significant correlation between LRP expression and tumor resistance to doxorubicin was found (p=0.03, Fisher's exact test). An inter-relationship between LRP expression and gender, age, stage, lymph node status and survival times was not observed. Furthermore, a relationship between LRP expression and proliferation (cell cycle phases, take rate of lung tumors in nude mice and cyclin A expression) was not detectable. However, a correlation of borderline significance was noticed between LRP expression and the patients' smoking habits. Carcinomas in heavy smokers (more than 30 cigarettes daily) were more frequently LRP-positive than carcinomas found in non-smokers (p=0.09, Fisher's exact test).

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Expression of lung resistance-related protein (LRP) in non-small cell lung carcinomas of smokers and non-smokers and its predictive value for doxorubicin resistance.

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