BACKGROUND: Basal cell carcinoma (BCC) is the most common human cancer. It is thought that skewed expression of desmogleins (Dsgs) in BCC may promote tumourigenesis. AIM: To comparatively examine expression of Dsg2/Dsg3, using fluorescent in situ hybridization (FISH) and immunohistochemistry (IHC) in BCC subtypes. METHODS: In total, 84 frozen sections from patients with various clinical or histological subtypes of BCC were analyzed. Expressions of Dsg2/Dsg3 protein and Dsg2/Dsg3 mRNA were evaluated using IHC and FISH, respectively, in BCC nests and BCC-free epidermis, and then quantitatively measured. RESULTS: There was loss of correlation between Dsg2 and Dsg3 (IHC) in nodular and superficial BCC (nBCC, sBCC), and significant correlation between Dsg2 and Dsg3 (FISH) in BCC, but not nBCC and sBCC. CONCLUSIONS: Because more prominent aberrations of Dsg2/Dsg3 expression were seen at the protein than at the mRNA level in BCC, these comparative observations indicate greater importance of events at the proteome level than those at the genome level in tumour functional compartments. Different Dsg2/Dsg3 expression in sBCC and nBCC might corroborate the possibility that sBCC and nBCC are separate conditions. These results may contribute to better understanding of the biological behaviour of BCC.
BACKGROUND:Basal cell carcinoma (BCC) is the most common humancancer. It is thought that skewed expression of desmogleins (Dsgs) in BCC may promote tumourigenesis. AIM: To comparatively examine expression of Dsg2/Dsg3, using fluorescent in situ hybridization (FISH) and immunohistochemistry (IHC) in BCC subtypes. METHODS: In total, 84 frozen sections from patients with various clinical or histological subtypes of BCC were analyzed. Expressions of Dsg2/Dsg3 protein and Dsg2/Dsg3 mRNA were evaluated using IHC and FISH, respectively, in BCC nests and BCC-free epidermis, and then quantitatively measured. RESULTS: There was loss of correlation between Dsg2 and Dsg3 (IHC) in nodular and superficial BCC (nBCC, sBCC), and significant correlation between Dsg2 and Dsg3 (FISH) in BCC, but not nBCC and sBCC. CONCLUSIONS: Because more prominent aberrations of Dsg2/Dsg3 expression were seen at the protein than at the mRNA level in BCC, these comparative observations indicate greater importance of events at the proteome level than those at the genome level in tumour functional compartments. Different Dsg2/Dsg3 expression in sBCC and nBCC might corroborate the possibility that sBCC and nBCC are separate conditions. These results may contribute to better understanding of the biological behaviour of BCC.
Authors: Cleberson J S Queiroz; Fei Song; Karen R Reed; Nadeem Al-Khafaji; Alan R Clarke; Dale Vimalachandran; Fabio Miyajima; D Mark Pritchard; John R Jenkins Journal: Front Oncol Date: 2020-08-11 Impact factor: 6.244