sentences:  In human monocytes and dendritic cells, this interaction results in the secretion of proinflammatory cytokines such as TNF.Recent study has identified Caveolin-1 as a potential regulator of TLR5 expression.In contrast to the decreased TLR4 level in senescent cells, TLR5 expression maintains relative stable during the aging process, which is correlated with the high level of Caveolin-1 in aging cells.