Hailey-Hailey disease keratinocytes: Normal assembly of cell-cell junctions in vitro

被引:10
作者
Cooley, JE
Briggaman, RA
Cronce, DJ
Banes, AJ
OKeefe, EJ
机构
[1] UNIV N CAROLINA,DEPT DERMATOL,CHAPEL HILL,NC 27599
[2] UNIV N CAROLINA,DEPT ORTHOPAED SURG,CHAPEL HILL,NC 27599
关键词
cadherins; vinculin; desmoplakin; adherens junctions; desmosomes;
D O I
10.1111/1523-1747.ep12331167
中图分类号
R75 [皮肤病学与性病学];
学科分类号
100206 ;
摘要
The blisters in the inherited disorder, Hailey-Hailey disease, may be caused by defective epidermal junctional complexes, We evaluated these structural complexes in vivo and in vitro. We induced a vesicular lesion in the apparently normal skin of a patient with Hailey-Hailey disease and studied a biopsy of this lesion by transmission electron microscopy. To determine whether acantholysis was related to a defect in the number or assembly of intercellular junctions, we cultured Hailey-Hailey disease keratinocytes in medium containing 0.1 mM Ca2+ and increased the [Ca2+] to 1.1 mM in order to induce assembly of cell-cell junctions. Keratinocytes Were examined by double immunofluorescence with antibodies to the desmosome protein, desmoplakin, and the adherens junction protein, vinculin, at intervals after the increase in [Ca2+]. Characteristic Hailey-Hailey disease histopathology was observed by electron microscopy of the patient's skin after trauma, but we found no splitting of desmosome, Based on the location, intensity, and rate of change of immunofluorescent staining, Hailey-Hailey and normal keratinocytes did not differ in their ability to assemble desmosomes and adherens junctions, Furthermore, we observed no significant morphologic differences between normal and Hailey-Hailey keratinocytes cultured in low and high [Ca2+]-containing media; Hailey-Hailey cells contained abundant normal-appearing desmosomes in 1.1 mM [Ca2+]. Since Hailey-Hailey disease keratinocytes can assemble normal-appearing adherens junctions and desmosomes in vitro, the functional defect may not lie in assembly of cell-cell adhering junctions, or additional perturbation may be required to expose the defect.
引用
收藏
页码:877 / 881
页数:5
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