Modulation of interleukin-6 expression in Hodgkin and Reed-Sternberg cells by Epstein-Barr virus

✍ Scribed by Herbst, Hermann; Samol, Jens; Foss, Hans-Dieter; Raff, Thorsten; Niedobitek, Gerald

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 583 KB
• Volume: 182
• Category: Article
• ISSN: 0022-3417
• DOI: 10.1002/(sici)1096-9896(199707)182:3<299::aid-path856>3.0.co;2-8

✦ Synopsis

Variable proportions of

Hodgkin's disease (HD) cases are associated with the Epstein-Barr virus (EBV), but the role of EBV in HD is not entirely clear. Hodgkin and Reed-Sternberg (HRS) cells of EBV-associated HD are characterized by expression of the EBV gene product LMP1. In other cellular environments, LMP1 has been shown to induce interleukin (IL)-6. In this study, 105 HD cases were tested for differences in IL-6 expression among LMP1-positive and -negative cases. Isotopic in situ hybridization and correlation with the presence of EBV gene products revealed significantly higher proportions of cases with IL-6-expressing tumour cells in LMP1-positive (31 of 37, 84 per cent) as compared with LMP1-negative HD cases (35 of 68, 51 per cent). Thus, although not exclusive to EBV-positive HRS cells, IL-6 expression appears to be upregulated in EBV-associated HD. IL-6 receptor (CD126) expression was tested by in situ hybridization and found in a broad spectrum of cell types, regularly including HRS cells. Superinduction of IL-6 expression may be among the mechanisms by which EBV confers a growth advantage on virus-infected HRS cells and by which the virus may contribute to the morphological and clinical peculiarities of HD.