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Peripheral immune cells and perinatal brain injury: a double-edged sword?

期刊

PEDIATRIC RESEARCH
卷 91, 期 2, 页码 392-403

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SPRINGERNATURE
DOI: 10.1038/s41390-021-01818-7

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资金

  1. Else-Kroner-Fresenius-Stiftung [2018_A113]
  2. European Union [874721/PREMSTEM]
  3. Projekt DEAL

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Perinatal brain injury is the leading cause of neurological mortality and morbidity in childhood, with various noxious stimuli contributing to the pathogenesis; Neuroinflammation plays an important role in perinatal brain injury, affecting the evolution of cell damage and repair activities; Different immune cell subsets, as well as sex differences and maturational stage, are critical factors in understanding perinatal brain injury.
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.

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