Differential Immunoexpression of BRAF/V600E, Senescence Markers, PTEN, and T-type Calcium Channels in Acquired Naevi According to their Histopathological and Dermoscopic Classification

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Data de publicació
2021Autor/a
Moreno, Sara
Barceló Gómez, Carla
Romero, Marta
Santacana Espasa, Maria
Gómez, Ignacio
Cuevas Sánchez, Dolors
Veà Jódar, Àlvar
Boix, Ramon
Valls Marsal, Joan
Gatius Calderó, Sònia
Soria, Xavier
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Moreno, Sara;
Maiques Carlos, Oscar;
Barceló Gómez, Carla;
Romero, Marta;
Santacana Espasa, Maria;
Gómez, Ignacio;
...
Martí Laborda, Rosa Ma..
(2021)
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Differential Immunoexpression of BRAF/V600E, Senescence Markers, PTEN, and T-type Calcium Channels in Acquired Naevi According to their Histopathological and Dermoscopic Classification.
Acta Dermato-Venereologica, 2021, vol. 101, núm. 11, p. 1-7.
https://doi.org/10.2340/actadv.v101.361.
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BRAF/V600E mutation and other cell growth/growth-control mechanisms are involved in naevogenesis and melanomagenesis. Immunoexpression of BRAF/V600E and other molecules (p16, phosphatase and tensin homologue (PTEN), Ki67, hTERT and Cav3.1 and 3.2 calcium channels) were investigated in 80 histopathologically and dermoscopically classified acquired naevi. Regarding BRAF/V600E, dysplastic naevi showed lower immunostaining than common naevi, which was significant in comparison with intradermal naevi, which showed the highest BRAF/V600E histoscore. Junctional naevi showed the lowest BRAF/V600E levels. Globular/cobblestone and reticular dermoscopic patterns were consistently associated with high and low BRAF/V600E immunoexpression, respectively, but Zalaudek’s peripheral globule pattern (CR/PG) showed the highest BRAF/V600E immunoexpression. Among global patterns, the previously not investigated multicomponent pattern showed the lowest BRAF/V600E immunoexpression. Regarding the remaining biomarkers, new immunohistochemical features were found, in particular p16 and PTEN low expression in multicomponent pattern; and Ki67, hTERT and Cav.3.1 high expression in CR/PG. In conclusion, histopathology and dermoscopy provide complementary information regarding the biology of melanocytic naevi.
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Acta Dermato-Venereologica, 2021, vol. 101, núm. 11, p. 1-7Projectes de recerca europeus
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