Abstract:
:Cellular interleukin 6 (IL-6) is an important growth factor for Kaposi sarcoma- associated herpesvirus (KSHV)-associated neoplasms, which include human immunodeficiency virus (HIV)-related and -unrelated cases of Kaposi sarcoma (KS), primary effusion lymphoma (PEL), and multicentric Castleman disease (MCD). Increased IL-6 levels are found in tissues affected with these diseases, and KSHV exists in a latent state in the majority of virally infected cells. In addition, acute infection with KSHV up-regulates IL-6 expression in endothelial cells. Thus, the hypothesis was considered that a latent KSHV gene product up-regulates IL-6 expression. To evaluate this hypothesis, the KSHV latency-associated nuclear antigen (LANA) was expressed in human embryonal kidney 293 cells and a bone marrow stromal cell line. LANA up-regulates IL-6 expression by inducing transcription from the IL-6 promoter, and the AP1 response element within the IL-6 promoter is necessary for and mediates IL-6 up-regulation by LANA. Thus, LANA may play a key pathophysiologic role in KSHV-associated neoplasms by functioning to up-regulate expression of IL-6.
journal_name
Bloodjournal_title
Bloodauthors
An J,Lichtenstein AK,Brent G,Rettig MBdoi
10.1182/blood.v99.2.649subject
Has Abstractpub_date
2002-01-15 00:00:00pages
649-54issue
2eissn
0006-4971issn
1528-0020journal_volume
99pub_type
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