PMID- 34750522 OWN - NLM STAT- MEDLINE DCOM- 20220328 LR - 20230209 IS - 1530-0447 (Electronic) IS - 0031-3998 (Print) IS - 0031-3998 (Linking) VI - 91 IP - 2 DP - 2022 Jan TI - Peripheral immune cells and perinatal brain injury: a double-edged sword? PG - 392-403 LID - 10.1038/s41390-021-01818-7 [doi] AB - Perinatal brain injury is the leading cause of neurological mortality and morbidity in childhood ranging from motor and cognitive impairment to behavioural and neuropsychiatric disorders. Various noxious stimuli, including perinatal inflammation, chronic and acute hypoxia, hyperoxia, stress and drug exposure contribute to the pathogenesis. Among a variety of pathological phenomena, the unique developing immune system plays an important role in the understanding of mechanisms of injury to the immature brain. Neuroinflammation following a perinatal insult largely contributes to evolution of damage to resident brain cells, but may also be beneficial for repair activities. The present review will focus on the role of peripheral immune cells and discuss processes involved in neuroinflammation under two frequent perinatal conditions, systemic infection/inflammation associated with encephalopathy of prematurity (EoP) and hypoxia/ischaemia in the context of neonatal encephalopathy (NE) and stroke at term. Different immune cell subsets in perinatal brain injury including their infiltration routes will be reviewed and critical aspects such as sex differences and maturational stage will be discussed. Interactions with existing regenerative therapies such as stem cells and also potentials to develop novel immunomodulatory targets are considered. IMPACT: Comprehensive summary of current knowledge on the role of different immune cell subsets in perinatal brain injury including discussion of critical aspects to be considered for development of immunomodulatory therapies. CI - (c) 2021. The Author(s). FAU - Herz, Josephine AU - Herz J AD - Department of Paediatrics I, Neonatology and Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Essen, Germany. Josephine.herz@uk-essen.de. AD - Centre for Translational Neuro- and Behavioural Sciences, C-TNBS, Faculty of Medicine, University Duisburg-Essen, Essen, Germany. Josephine.herz@uk-essen.de. FAU - Bendix, Ivo AU - Bendix I AD - Department of Paediatrics I, Neonatology and Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Essen, Germany. AD - Centre for Translational Neuro- and Behavioural Sciences, C-TNBS, Faculty of Medicine, University Duisburg-Essen, Essen, Germany. FAU - Felderhoff-Muser, Ursula AU - Felderhoff-Muser U AD - Department of Paediatrics I, Neonatology and Experimental Perinatal Neurosciences, University Hospital Essen, University Duisburg-Essen, Essen, Germany. ursula.felderhoff@uk-essen.de. AD - Centre for Translational Neuro- and Behavioural Sciences, C-TNBS, Faculty of Medicine, University Duisburg-Essen, Essen, Germany. ursula.felderhoff@uk-essen.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20211108 PL - United States TA - Pediatr Res JT - Pediatric research JID - 0100714 SB - IM MH - Brain Injuries/*immunology/therapy MH - Female MH - Humans MH - Immunity, Innate MH - Leukocytes/classification/immunology MH - Lymphocyte Subsets MH - Male PMC - PMC8816729 COIS- The authors declare no competing interests. EDAT- 2021/11/10 06:00 MHDA- 2022/03/29 06:00 PMCR- 2021/11/08 CRDT- 2021/11/09 06:58 PHST- 2021/06/15 00:00 [received] PHST- 2021/09/14 00:00 [accepted] PHST- 2021/08/24 00:00 [revised] PHST- 2021/11/10 06:00 [pubmed] PHST- 2022/03/29 06:00 [medline] PHST- 2021/11/09 06:58 [entrez] PHST- 2021/11/08 00:00 [pmc-release] AID - 10.1038/s41390-021-01818-7 [pii] AID - 1818 [pii] AID - 10.1038/s41390-021-01818-7 [doi] PST - ppublish SO - Pediatr Res. 2022 Jan;91(2):392-403. doi: 10.1038/s41390-021-01818-7. Epub 2021 Nov 8.