PMID- 36871640 OWN - NLM STAT- MEDLINE DCOM- 20230322 LR - 20230412 IS - 1095-953X (Electronic) IS - 0969-9961 (Linking) VI - 179 DP - 2023 Apr TI - Immune regulation in neurovascular units after traumatic brain injury. PG - 106060 LID - S0969-9961(23)00074-8 [pii] LID - 10.1016/j.nbd.2023.106060 [doi] AB - Traumatic brain injury (TBI) is a major cause of death and disability worldwide. Survivors may experience movement disorders, memory loss, and cognitive deficits. However, there is a lack of understanding of the pathophysiology of TBI-mediated neuroinflammation and neurodegeneration. The immune regulation process of TBI involves changes in the peripheral and central nervous system (CNS) immunity, and intracranial blood vessels are essential communication centers. The neurovascular unit (NVU) is responsible for coupling blood flow with brain activity, and comprises endothelial cells, pericytes, astrocyte end-feet, and vast regulatory nerve terminals. A stable NVU is the basis for normal brain function. The concept of the NVU emphasizes that cell-cell interactions between different types of cells are essential for maintaining brain homeostasis. Previous studies have explored the effects of immune system changes after TBI. The NVU can help us further understand the immune regulation process. Herein, we enumerate the paradoxes of primary immune activation and chronic immunosuppression. We describe the changes in immune cells, cytokines/chemokines, and neuroinflammation after TBI. The post-immunomodulatory changes in NVU components are discussed, and research exploring immune changes in the NVU pattern is also described. Finally, we summarize immune regulation therapies and drugs after TBI. Therapies and drugs that focus on immune regulation have shown great potential for neuroprotection. These findings will help us further understand the pathological processes after TBI. CI - Copyright (c) 2023 The Author(s). Published by Elsevier Inc. All rights reserved. FAU - Wang, Zongqi AU - Wang Z AD - Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu Province 215006, China; Institute of Stroke Research, Soochow University, Suzhou, Jiangsu Province 215006, China. FAU - Chen, Gang AU - Chen G AD - Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu Province 215006, China; Institute of Stroke Research, Soochow University, Suzhou, Jiangsu Province 215006, China. Electronic address: sz_neurosurgery@163.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230305 PL - United States TA - Neurobiol Dis JT - Neurobiology of disease JID - 9500169 SB - IM MH - Humans MH - *Endothelial Cells/pathology MH - Neuroinflammatory Diseases MH - *Brain Injuries, Traumatic MH - Brain/pathology MH - Central Nervous System/pathology MH - Blood-Brain Barrier/pathology OTO - NOTNLM OT - Immune activation OT - Immune regulation OT - Immune suppression OT - Immune therapy OT - Neurovascular units OT - Traumatic brain injury COIS- Declaration of Competing Interest The authors declare that there are no conflicts of interest. EDAT- 2023/03/06 06:00 MHDA- 2023/03/23 06:00 CRDT- 2023/03/05 19:29 PHST- 2022/12/01 00:00 [received] PHST- 2023/02/19 00:00 [revised] PHST- 2023/02/28 00:00 [accepted] PHST- 2023/03/06 06:00 [pubmed] PHST- 2023/03/23 06:00 [medline] PHST- 2023/03/05 19:29 [entrez] AID - S0969-9961(23)00074-8 [pii] AID - 10.1016/j.nbd.2023.106060 [doi] PST - ppublish SO - Neurobiol Dis. 2023 Apr;179:106060. doi: 10.1016/j.nbd.2023.106060. Epub 2023 Mar 5.