LGI1 and encephalitis: Our in vitro experiment elucidated that higher expression of miR-2467-5p in PBMCs not only significantly induced silence of PDCD1 and CSF3 expression but enhanced CCL15 activation, and this phenomenon was also consistent with our findings that miR-2467-5p expression in PBMCs of LGI1 encephalitis patients was negatively correlated with the expression of PDCD1 and CSF3 in serum while positively correlated with CCL15 expression in serum.