PMID- 28238708 OWN - NLM STAT- MEDLINE DCOM- 20180426 LR - 20210309 IS - 1872-7972 (Electronic) IS - 0304-3940 (Linking) VI - 644 DP - 2017 Mar 22 TI - Brain-derived neurotrophic factor downregulates immunoglobulin heavy chain binding protein expression after repeated cocaine administration in the rat dorsal striatum. PG - 107-113 LID - S0304-3940(17)30179-9 [pii] LID - 10.1016/j.neulet.2017.02.063 [doi] AB - Brain-derived neurotrophic factor (BDNF) is a key molecule involved in the regulation of glutamatergic neurotransmission in response to chronic stimulation of psychostimulants. This study demonstrated that BDNF in the dorsal striatum regulates the endoplasmic reticulum (ER) stress response after repeated exposure to cocaine. The results showed that unilateral intracaudate infusion of BDNF (0.40, 0.75, or 1.50mug/muL) decreased the repeated cocaine-induced increase in the expression of immunoglobulin heavy chain binding protein (BiP) sensing unfolded or misfolded proteins in a dose-dependent manner. Unilateral intracaudate infusion of BDNF (0.75mug/muL) also decreased the phosphorylation of c-Jun N-terminal kinase (JNK), which had been initially elevated by seven consecutive daily intraperitoneal injections of cocaine (20mg/kg/day). These decreases were reversed by unilateral intracaudate infusion of the specific tropomyosin receptor kinase B (TrkB) antagonist, cyclotraxin B (1ng/muL). These findings suggest that BDNF regulates the unfolded protein response via TrkB-linked JNK inactivation in the dorsal striatum after repeated cocaine administration, thus contributing to the restoration of the ER functions. CI - Copyright (c) 2017 Elsevier B.V. All rights reserved. FAU - Kim, Jieun AU - Kim J AD - Department of Biological Sciences, Pusan National University, 63-2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea. FAU - Yang, Ju Hwan AU - Yang JH AD - Department of Biological Sciences, Pusan National University, 63-2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea. FAU - Ryu, In Soo AU - Ryu IS AD - Department of Biological Sciences, Pusan National University, 63-2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea. FAU - Choe, Eun Sang AU - Choe ES AD - Department of Biological Sciences, Pusan National University, 63-2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Republic of Korea. Electronic address: eschoe@pusan.ac.kr. LA - eng PT - Journal Article DEP - 20170224 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Central Nervous System Stimulants) RN - 0 (GRP78 protein, rat) RN - 0 (Heat-Shock Proteins) RN - I5Y540LHVR (Cocaine) SB - IM MH - Animals MH - Brain-Derived Neurotrophic Factor/*metabolism MH - Central Nervous System Stimulants/pharmacology MH - Cocaine/*pharmacology MH - Corpus Striatum/drug effects/*metabolism MH - Down-Regulation MH - Endoplasmic Reticulum Stress/drug effects/physiology MH - Heat-Shock Proteins/*biosynthesis MH - Male MH - Rats MH - Rats, Sprague-Dawley MH - Unfolded Protein Response/*drug effects/physiology OTO - NOTNLM OT - ER stress OT - JNK OT - Neurotropic factor OT - Psychostimulant OT - UPR EDAT- 2017/02/28 06:00 MHDA- 2018/04/27 06:00 CRDT- 2017/02/28 06:00 PHST- 2016/10/18 00:00 [received] PHST- 2017/02/10 00:00 [revised] PHST- 2017/02/22 00:00 [accepted] PHST- 2017/02/28 06:00 [pubmed] PHST- 2018/04/27 06:00 [medline] PHST- 2017/02/28 06:00 [entrez] AID - S0304-3940(17)30179-9 [pii] AID - 10.1016/j.neulet.2017.02.063 [doi] PST - ppublish SO - Neurosci Lett. 2017 Mar 22;644:107-113. doi: 10.1016/j.neulet.2017.02.063. Epub 2017 Feb 24.