Abstract:  Endoplasmic reticulum stress (ERS) induce the protein folding reaction, and then make endoplasmic reticulum three pathway PERK, IRE1 and ATF6 separate from the endoplasmic reticulum chaperone, activate of three pathways and start the apoptosis pathway. We used the animal model of posttraumatic stress disorder: single prolonged stress (SPS) to find endoplasmic reticulum stress cause the endoplasmic reticulum chaperone and protect neurons at the early stage of SPS, but in the later period of SPS, when the ability decreased that endoplasmic reticulum chaperone correct for the folding protein, ERS could accelerate the activation of three path and induce the cell apoptosis.

Key words: Endoplasmic reticulum stress, single prolonged stress, PERK, IRE1, ATF6