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• W1983765229 abstract "Hodgkin and Reed-Sternberg (H/RS) cells are characterized by chromosomal instability. Nevertheless, neither specific nor consistent chromosomal alterations could be characterized in H/RS cells. Microsatellite instability (MSI) is another form of genomic instability but its role in the pathogenesis of classical Hodgkin's disease (cHD) has not been investigated so far. We analyzed MSI and mismatch repair (MMR) protein expression in H/RS cells of cHD in order to assess genomic instability in these cells. Using a sensitive single cell approach, MSI-low was detected in a portion of single cells of the H/RS cell line L1236. Mutations of genes encoding for hMSH2 and hMLH1 were excluded by RT-PCR in L1236 cells. An analysis of pooled single H/RS cells of seven primary cases of cHD showed loss of heterozygosity for some allelic markers but absence of MSI in all 7 cases. Owing to a tight correlation between MSI-high, inactivating mutations of MMR genes and MMR protein expression in colon cancer, MMR protein expression commonly is used as a marker for MSI. In order to screen additional primary cases of cHD for MSI, we performed immunohistochemistry for hMSH2 and hMLH1 in 6 of the 7 cases analyzed by single cell PCR and 20 additional cases of cHD. H/RS cells from 25 out of 26 cases showed a nuclear staining pattern for hMSH2 and hMLH1 similar to germinal center B cells of non-malignant lymph nodes. These results indicate a proficient MMR system in most H/RS cells. It is concluded that a defect MMR system is unlikely to contribute to the malignant phenotype and genomic instability of H/RS cells in cHD. © 2002 Wiley-Liss, Inc." @default.
• W1983765229 created "2016-06-24" @default.
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• W1983765229 date "2001-10-06" @default.
• W1983765229 modified "2023-09-23" @default.
• W1983765229 title "Proficient mismatch repair protein expression in Hodgkin and Reed Sternberg cells" @default.
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• W1983765229 doi "https://doi.org/10.1002/ijc.1586" @default.
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