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- W2005353934 abstract "The expression of HLA class I alpha-chain and beta(2)-m subunits was studied at the protein level by a semiquantitative Western blot (WB) approach, in 25 primary breast tumors. The results indicated three pathways of alterations defined comparing the tumor WB gel band with the corresponding PBL gel band: (i) high downregulation pattern (the tumor WB gel band was < or =50% relative to the PBL band), which was found in 44% and 36% of tumors for alpha-chain and beta(2)-m, respectively; (ii) low downregulation pattern (the tumor gel band was between 51% and 75%), which was found in 24% and 20% of tumors for alpha-chain and beta(2)75%), which was found in 32% and 44% of tumors for alpha-chain and beta(2)-m, respectively. The concordance rate with immunohistochemistry (IHC) performed on the same tissue samples was 72% for alpha-chain and 64% for beta(2)-m. This study shows that the use of a semiquantitative WB technique can well define the levels of HLA class I antigens in an autologous setting allowing the biochemical analysis of HLA class I downregulation directly in solid tumor tissues. In addition, the WB technique can be a valuable tool to objectively support the IHC method." @default.
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- W2005353934 date "2000-04-01" @default.
- W2005353934 modified "2023-10-13" @default.
- W2005353934 title "Biochemical analysis of HLA class I subunits expression in breast cancer tissues" @default.
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- W2005353934 doi "https://doi.org/10.1016/s0198-8859(99)00179-2" @default.
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