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KMID : 1101420170490040460
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Korean Journal of Clinical Laboratory Science
2017 Volume.49 No. 4 p.460 ~ p.469
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Analysis of the Correlation between Expressions of HSP90α, HSP90β, and GRP94, and the Clinicopathologic Characteristics in Tissues of Non-Small Cell Lung Cancer Patients
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Kim Mi-Kyeong
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Abstract
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Heat shock proteins (HSPs) are induced as a self-defense mechanism of cells when exposed to various external stresses, such as high fever, infection, free radicals, and heavy metals. They affect the prognosis in the process of tumor formation. HSP is classified into four families: HSP27, HSP60, HSP90, and HSP100, depending on molecular weight. Heat shock protein 90 (HSP90), a molecular chaperone, plays an important role in the cellular protection against various stressful stimuli and in the regulation of cell cycle progression and apoptosis. In the present study, we assessed the differential expression of HSP90 family proteins in non-small cell lung cancer (NSCLC), and the correlation of their expression levels with clinicopathologic factors and patient survival rates. The result of this study can be summarized as follows; HSP90α showed higher expression in patients with no lymphovascular invasion (p=0.014). HSP90β showed a higher expression of squamous cell carcinoma (p=0.003), and an over expression of glucose-related protein (GRP94) was significantly associated with poor differentiation (p=0.048). However, none of the HSP90 proteins showed a significant association with the survival status in patients with NSCLC. This study also indicates that HSP90α might contribute more to the carcinogenesis of NSCLC than HSP90β, and GRP94 and isoform selectivity should be considered when HSP90 inhibitors are studied or utilized in the treatment of NSCLC.
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KEYWORD
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Heat shock protein 90α, Heat shock protein90β, Glucose related protein94, Non-small cell lung cancer
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