Decrease of E-cadherin expression in canine cutaneous histiocytoma appears to be related to its spontaneous regression.
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2009
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Background: Canine cutaneous histiocytoma
(CCH) is an epidermotropic tumour of Langerhans cells, most frequent in young dogs, which undergoes spontaneous regression. Materials and Methods: E-cadherin immunoexpression was analysed in ninety-three CCH, categorized according to Cockerell and Slauson (1976) criteria into four histological groups, representing different stages of tumour regression. Results: All tumours expressed membranous Ecadherin both in keratinocytes, and in tumoural cells and no differences were noted among the histological groups analysed.However, the intensity of the E-cadherin immunolabeling
decreased in the presence of lymphoid infiltration and varied
significantly among the groups considered (p<0.0001).Conclusion: This study strongly suggests a down-regulation of E-cadherin expression in CCH pathogenesis and progression.The loss of E-cadherin expression might represent an
activation/ maturation process of the tumoural cells
constituting a switch for CCH regression
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Canine cutaneous histiocytoma , E-cadherin , immunohistochemistry , tumour regression