| First Author | Frederico B | Year | 2014 |
| Journal | J Virol | Volume | 88 |
| Issue | 8 | Pages | 3965-75 |
| PubMed ID | 24501409 | Mgi Jnum | J:212997 |
| Mgi Id | MGI:5582672 | Doi | 10.1128/JVI.03497-13 |
| Citation | Frederico B, et al. (2014) BAFF receptor deficiency limits gammaherpesvirus infection. J Virol 88(8):3965-75 |
| abstractText | Lymphocyte colonization by gammaherpesviruses (gammaHVs) is an important target for cancer prevention. However, how it works is not clear. Epstein-Barr virus drives autonomous B cell proliferation in vitro but in vivo may more subtly exploit the proliferative pathways provided by lymphoid germinal centers (GCs). Murid herpesvirus 4 (MuHV-4), which realistically infects inbred mice, provides a useful tool with which to understand further how a gammaHV colonizes B cells in vivo. Not all gammaHVs necessarily behave the same, but common events can with MuHV-4 be assigned an importance for host colonization and so a potential as therapeutic targets. MuHV-4-driven B cell proliferation depends quantitatively on CD4(+) T cell help. Here we show that it also depends on T cell-independent survival signals provided by the B cell-activating factor (BAFF) receptor (BAFF-R). B cells could be infected in BAFF-R(-/-) mice, but virus loads remained low. This corresponded to a BAFF-R-dependent defect in GC colonization. The close parallels between normal, antigen-driven B cell responses and virus-infected B cell proliferation argue that in vivo, gammaHVs mostly induce infected B cells into normal GC reactions rather than generating large numbers of autonomously proliferating blasts. IMPORTANCE: gammaHVs cause cancers by driving the proliferation of infected cells. B cells are a particular target. Thus, we need to know how virus-driven B cell proliferation works. Controversy exists as to whether viral genes drive it directly or less directly orchestrate the engagement of normal, host-driven pathways. Here we show that the B cell proliferation driven by a murid gammaHV requires BAFF-R. This supports the idea that gammaHVs exploit host proliferation pathways and suggests that interfering with BAFF-R could more generally reduce gammaHV-associated B cell proliferation. |
