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Assessment of PI3K/AKT and MAPK/ERK pathways activation in oral lymphatic malformations
Isadora Pereira Gomes1, Letícia Martins Guimarães2, Thaís Dos Santos Fontes Pereira1
1Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Objective:
Lymphatic malformations are characterized by the overgrowth of lymphatic vessels during development. Activation of PI3K/AKT and MAPK/ERK signaling pathways occur in isolated lymphatic malformation and in those associated with syndromes such as CLOVES and Klippel-Trenaunay. We aimed to assess the activation of these pathways in sporadic oral lymphatic malformations.
Study Design:
A convenience sample of 14 formalin-fixed paraffin-embedded samples of oral lymphatic malformations underwent immunohistochemical reactions for the phosphorylated forms of AKT1 (pAKT-Ser473) and ERK1/2 (pERK1/2-Thr202/Tyr204), which are markers of PI3K/AKT and MAPK/ERK pathways activation, respectively.
Results:
Positive staining for pAKT1 and pERK1/2 was observed in the endothelial cells in all samples of oral lymphatic malformations evaluated.
Conclusions:
Our results suggest that activation of PI3K/AKT and MAPK/ERK signaling pathways participates in the pathogenesis of oral lymphatic malformations.
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