Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2007, 151(2):251-255 | DOI: 10.5507/bp.2007.042

Immunohistochemical assessment of E-cadherin and β-catenin in trichofolliculomas and trichoepitheliomas

Michala Bezdekovaa, Svetlana Brychtovaa, Eva Sedlakovaa, Jana Steigerovaa, Alice Hlobilkovaa, Martina Bienovab, Renata Kucerovab, Tomas Brychtac, Veronika Krejcia, Zdenek Kolara
a Laboratory of Molecular Pathology and Department of Pathology, Faculty of Medicine and Dentistry, Palacky University,Hnevotinska 3, 775 15 Olomouc, Czech Republic
b Department of Dermatovenerology, Faculty of Medicine and Dentistry, Palacky University and University Hospital, I. P. Pavlova 6, 775 20 Olomouc, Czech Republic
c Department of Internal Medicine, SPEA Olomouc, nam. Hrdinu 2, 772 00 Olomouc, Czech Republic

Background: Trichofolliculomas and trichoepitheliomas are benign skin neoplasms originating from hair follicle cells. They result from defects in the signaling pathways that regulate hair follicle morphogenesis and regeneration. Thus they seem to be an excellent model of these processes. It is known that the E-cadherin/β-catenin system of adhesion molecules plays a crucial role in the maintenance of tissue architecture.

Aim: The aim of the present study was to investigate their involvement in benign hair follicle tumor development.

Methods: Semiquantitative intensity of expression were examined in formalin-fixed and paraffin-embedded tissue sections of 53 trichoepitheliomas, 15 trichofolliculomas and 19 normal skin samples by indirect immunohistochemistry.

Results: The intensity of E-cadherin/β-catenin expression in tumor cells did not differ from controls. However, normal hair follicles cells exhibited membranous E-cadherin/β-catenin expression, whereas both types of tumors, particularly trichoepitheliomas, showed E-cadherin/β-catenin expression with a predominantly cytoplasmic localization.

Conclusions: We suggest that this dystopic distribution of the E-cadherin/β-catenin complex in hair follicle tumor cells may be a marker of cell-cell adhesion disruption which may contribute to the tumor formation.

Keywords: E-cadherin, β-catenin, Immunohistochemistry, Pathogenesis, Trichoepithelioma, Trichofolliculoma

Received: September 5, 2007; Accepted: November 1, 2007; Published: December 1, 2007  Show citation

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Bezdekova, M., Brychtova, S., Sedlakova, E., Steigerova, J., Hlobilkova, A., Bienova, M., ... Kolar, Z. (2007). Immunohistochemical assessment of E-cadherin and β-catenin in trichofolliculomas and trichoepitheliomas. Biomedical papers, 151(2), 251-255. doi: 10.5507/bp.2007.042
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