FMNL1 and periodontitis: Additionally, FMNL1 is upregulated in the course of monocyte differentiation to macrophages (Mersich et al., 2010), which might be used for explaining the significant correlation between FMNL1 and monocytes in periodontitis (Table 8: r = 0.701080924; p = 5.82E-37) and PD (Table 8: r = 0.143364384; p = 0.015428656).