PPP6C and post-traumatic stress disorder: LNPs have recently become the leading non‐viral delivery system for the efficient delivery of small‐molecule drugs and nucleic acids.[53] Therefore, we constructed PPP6C siRNA‐LNPs to knockdown PPP6C expression in the MD in a mouse model of PTSD, which has been shown to be an efficient and non‐toxic method for delivering siRNA to the brain.