Long-term viremia in chronic HBV patients occurs either spontaneous in inactive carrier (IC) patients or therapy-induced by nucleos(t)ide analogues (NUC). To better understand the characteristics of viremia control, we evaluated gene expression of purified leukocyte subsets from IC versus NUC-treated patients, and evaluated the putative modulatory effects of HBsAg.We observed that gene expression of NUC-treated patients differed markedly from IC patients, especially in DC, monocytes and CD8+ T cells, while serum HBsAg levels had little effect. Nevertheless, based on our findings it cannot be excluded that HBsAg may act locally in the infected liver or affects preferentially HBV-specific cells.