STAT6 and disease arising from reactivation of latent virus: To elucidate the physiologically functional link between nuclear localization and cleavage of STAT6 induced by LANA during KSHV latent infection, and given that LANA blocks cytokine IL-4-stimulated STAT6 signaling for maintaining latency [23], we speculated that KSHV might also utilize nuclear-localized STAT6 and its cleaved isoform induced by LANA as a negative regulator to repress viral lytic gene transcription.