Microenvironment Assessment, Disease Characteristics and Prognosis In HIV-Associated (HIV-cHL) and HIV-Negative Classical Hodgkin Lymphoma: The Influence Of Epstein Barr Virus (EBV)
| Autor: | Amy Chadburn, Shylendra B Sreenivasappa, Victoria Angelova, Paul G. Rubinstein, Marina Messinger, Ingrid Sumpter, Ariela Noy, Adam M. Petrich, Shweta Gupta, Ethel Cesarman, Locke J. Bryan, Jonathan Moreira |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Blood. 122:2996-2996 |
| ISSN: | 1528-0020 0006-4971 |
| Popis: | Introduction Studies of EBV positive (+) and negative (-) classical Hodgkin lymphoma (cHL) have shown the importance of the immune microenvironment in affecting Reed-Sternberg (hRS) cell survival, proliferation, and biologic behavior. For example, macrophage infiltrates may correlate with inferior disease outcome and survival and proliferation of the hRS cells depends on trophic signals from various inflammatory cells, including CD4+ T cells. The latter finding may explain why HIV-cHL patients (pts) usually present with higher circulating CD4+ T-cell counts (cCD4) compared to HIV-related non-Hodgkin lymphoma. Pathobiologically, HIV-cHL differs from HIV negative cHL (cHL) in that it is nearly always EBV+, has higher numbers of hRS cells, presents with more advanced median stage, exhibits more commonly the mixed cellularity (MC) pattern, and some studies suggest it is more clinically aggressive. To investigate the microenvironment of HIV-cHL and its influence on cHL biology, we assessed the immune cell composition and clinical characteristics of HIV-cHL and compared the findings to those of EBV+ and EBV- cHLs. Methods 31 HIV-cHL and 40 cHL (8 EBV+/32 EBV-) cases were identified and corresponding tissue microarrays (TMAs) created. TMAs were evaluated for EBV (EBER), CD30, and microenvironment-associated antigens: PAX5, CD3, CD4, CD8, CD68, CD163 (% positive), TIA1, FOXP3 (relative number 0-4+); the hRS-macrophage microenvironment was evaluated by assessing the number of hRS where >50% of the circumference of the neoplastic cell was associated with CD68+ cells. Results were compared based on HIV status, EBV status (in HIV negative pts), demographics, cCD4 and histology; each was correlated with overall survival. Analyses were performed using non-parametric Fisher's exact test, Kaplan-Meier method and Cox Proportional Hazards model. Results M:F ratio was 9:1 in the HIV group vs. 1.3:1 in the HIV negative pts (p 15% (p Conclusions No significant differences were observed between HIV-cHL and cHL pts with respect to stage, B symptoms, bulky disease, IPS score, or overall survival, but there were more MC cases in the HIV-cHL cohort. The microenvironment of HIV-cHL and EBV+ cHL is similar, but different from EBV- cHL with respect to percentages of CD163+, PAX5+, CD4+ and CD8+ cells. The location of CD68+ macrophages was the only discordant result between the EBV+ HIV-cHL and EBV+ cHL cohorts. The differences in location of the CD68+ cells, which may be dependent on HIV status, suggests greater influence of these cells on the biologic behavior of the neoplastic process, correlating with poor survival. However, the similarity in the microenvironments in HIV-cHL and EBV+ cHL with respect to CD4, CD8, and CD163 staining implies an important role for EBV on disease biology, as well. Thus, these data suggest that EBV as well as HIV, play prominent roles in determining the immune response and disease behavior in HIV-cHL, warranting further study Disclosures: No relevant conflicts of interest to declare. |
| Databáze: | OpenAIRE |
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