PMID- 36917739 OWN - NLM STAT- MEDLINE DCOM- 20230414 LR - 20230423 IS - 2162-3279 (Electronic) VI - 13 IP - 4 DP - 2023 Apr TI - Fingolimod ameliorates chronic experimental autoimmune neuritis by modulating inflammatory cytokines and Akt/mTOR/NF-kappaB signaling. PG - e2965 LID - 10.1002/brb3.2965 [doi] LID - e2965 AB - OBJECTIVE: Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is an immune-mediated disease that targets the myelin sheaths of the peripheral nerves. Fingolimod is a sphingosine 1 phosphate (S1P) receptor antagonist with a high affinity for S1P receptors through the Akt-mTOR pathway, and prior research has suggested that it might be helpful in autoimmune illnesses. METHODS: Chronic experimental autoimmune neuritis (c-EAN) was induced by immunizing Lewis rats with the S-palm P0(180-199) peptide, and then the treatment group was intraperitoneally injected with fingolimod (1 mg/kg) daily. Hematoxylin and eosin staining was used to assess the severity of nerve injury. Immunohistochemistry staining showed that fingolimod's anti-inflammatory effects on c-EAN rats might be realized through the NF-kappaB signaling pathway. Tumor necrosis factor-alpha (TNF-alpha), interferon-gamma (INF-gamma), interleukin-1beta (IL-1beta), interleukin 6 (IL-6), inducible nitric oxide synthase (iNOS), and intercellular adhesion molecule-1 (ICAM-1) were measured to evaluate the inflammation levels, and pAkt, p-S6, and p-p65 were used to measure the abundance of downstream activation markers to determine whether the Akt/mTOR/NF-kappaB signaling pathway was activated in the c-EAN model. RESULTS: Fingolimod treatment reduced the inflammatory reaction and the expression of NF-kappaB in sciatic nerves. It also decreased the mRNA levels of the proinflammatory cytokines TNF-alpha, IFN-gamma, IL-1beta, IL-6, iNOS, and ICAM-1 and pAkt, p-S6, and p-p65, representing the Akt/mTOR/NF-kappaB signaling pathway. CONCLUSION: Our data showed that fingolimod could improve the disease course, alleviate the decrease in inflammation, and reduce proinflammatory cytokines through the Akt/mTOR/NF-kappaB axis in c-EAN rats, which could be beneficial for the development of CIDP-related research. CI - (c) 2023 The Authors. Brain and Behavior published by Wiley Periodicals LLC. FAU - Feng, Yuan AU - Feng Y AD - Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, China. AD - Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, China. FAU - Feng, Fang AU - Feng F AD - Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China. FAU - Pan, Shuyi AU - Pan S AD - Department of Hyperbaric Medicine, 6th Medical Center of PLA General Hospital, Beijing, China. FAU - Zhang, Jiewen AU - Zhang J AD - Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, China. FAU - Li, Wei AU - Li W AD - Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230314 PL - United States TA - Brain Behav JT - Brain and behavior JID - 101570837 RN - 0 (Cytokines) RN - 0 (NF-kappa B) RN - G926EC510T (Fingolimod Hydrochloride) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Interleukin-6) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.1.1 (mTOR protein, rat) SB - IM MH - Rats MH - Animals MH - Cytokines/metabolism MH - NF-kappa B/metabolism MH - Fingolimod Hydrochloride/adverse effects MH - Proto-Oncogene Proteins c-akt/metabolism MH - Intercellular Adhesion Molecule-1/adverse effects/genetics MH - Tumor Necrosis Factor-alpha MH - Interleukin-6 MH - *Polyradiculoneuropathy, Chronic Inflammatory Demyelinating MH - *Neuritis, Autoimmune, Experimental/drug therapy MH - Rats, Inbred Lew MH - Signal Transduction MH - TOR Serine-Threonine Kinases/adverse effects/metabolism MH - Inflammation/drug therapy PMC - PMC10097075 OTO - NOTNLM OT - NF-kappaB OT - chronic experimental autoimmune neuritis OT - chronic inflammatory demyelinating polyradiculoneuropathy OT - fingolimod OT - peripheral neuropathy COIS- The authors declare no conflicts of interest. EDAT- 2023/03/15 06:00 MHDA- 2023/04/14 06:42 PMCR- 2023/03/14 CRDT- 2023/03/14 15:42 PHST- 2023/02/14 00:00 [revised] PHST- 2022/12/27 00:00 [received] PHST- 2023/02/17 00:00 [accepted] PHST- 2023/04/14 06:42 [medline] PHST- 2023/03/15 06:00 [pubmed] PHST- 2023/03/14 15:42 [entrez] PHST- 2023/03/14 00:00 [pmc-release] AID - BRB32965 [pii] AID - 10.1002/brb3.2965 [doi] PST - ppublish SO - Brain Behav. 2023 Apr;13(4):e2965. doi: 10.1002/brb3.2965. Epub 2023 Mar 14.