The expression of heat shock proteins 27 and 105 in squamous cell carcinomaof the tongue and relationship with clinicopathological index

ABSTRACT

Introduction: In oral cavity, the tongue is the most common site prone to development of squamous cell carcinoma(SCC). Considering malignant transformation as a cellular stress, the expression of heat shock proteins (HSPs)may be affected in this process. In this study we assessed the expression of HSP105 and HSP27 as two of the mostinterested stress proteins and investigated their relationship with grade and stage of the tongue SCC.Material and Methods: Fifty-six specimens including 31 early and 25 advanced tongue SCC were gathered. Allspecimens were graded histologically from I to III. Sixteen sections of normal oral mucosa were used as controlgroup. The cellularity and intensity of HSP105 and HSP27 expression were studied immunohistochemically inboth case and control groups. Results were expressed by histochemical score (HSCORE).Results: Significant differences were observed between expression of HSPs and stage of the disease. From earlyto advanced stage, the expression of HSP105 and HSP27 increased and decreased, respectively. There was norelationship between histological grade of lesion and HSCORE of HSP105 expression (P=0.5), although, HSP27expression had reverse relationship with the SCC histological grade.Conclusion: HSP27 and HSP105 may be indicated for prognostic purposes in evaluation of tongue SCC. HSP 27may be used for more accurate microscopic grading of tongue SCC. Increased expression of HSP105 in advancedstage may lead to using this protein for immunotherapy of tongue SCC (AU)

RESUMEN

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