Cited by 142Neuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research StudiesTryptophan and brain disorders

The Emerging Role of Central and Peripheral Immune Systems in Neurodegenerative Diseases

Open access
Zang, Xin, Chen, Si, Zhu, JunYao, Ma, Junwen, Zhai, Yongzhen·2022·Frontiers in Aging Neuroscience

Abstract

For decades, it has been widely believed that the blood–brain barrier (BBB) provides an immune privileged environment in the central nervous system (CNS) by blocking peripheral immune cells and humoral immune factors. This view has been revised in recent years, with increasing evidence revealing that the peripheral immune system plays a critical role in regulating CNS homeostasis and disease. Neurodegenerative diseases are characterized by progressive dysfunction and the loss of neurons in the CNS. An increasing number of studies have focused on the role of the connection between the peripheral immune system and the CNS in neurodegenerative diseases. On the one hand, peripherally released cytokines can cross the BBB, cause direct neurotoxicity and contribute to the activation of microglia and astrocytes. On the other hand, peripheral immune cells can also infiltrate the brain and participate in the progression of neuroinflammatory and neurodegenerative diseases. Neurodegenerative diseases have a high morbidity and disability rate, yet there are no effective therapies to stop or reverse their progression. In recent years, neuroinflammation has received much attention as a therapeutic target for many neurodegenerative diseases. In this review, we highlight the emerging role of the peripheral and central immune systems in neurodegenerative diseases, as well as their interactions. A better understanding of the emerging role of the immune systems may improve therapeutic strategies for neurodegenerative diseases.

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Crossref · 10.3389/fnagi.2022.872134

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  • Acute inflammatory cytokines act as messengers to brain immune cells and signals to other local immune cells.

    “but when acute, act as messengers to brain immune cells and signals to other local immune cells [44–46].”

    From Alzheimer’s disease-associated protective variant Plcg2-P522R modulates peripheral macrophage function in a sex-dimorphic manner (2024) · cites this paper as [46]

    The CNS sections on Microglia and Astrocytes describe cytokines acting on brain cells: Th1 cytokines drive microglial polarization, and microglial pro-inflammatory factors activate astrocytes. These passages support the signaling role, but they describe stressors or pathological conditions rather than specifically acute inflammation, and do not establish the claimed acute role in signaling to other local immune cells. Page numbers are unavailable in our copy. (LLM, conf=0.84)

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Authors
Zang, X., Chen, S., Zhu, J., Ma, J., & Zhai, Y.
Affiliations
  • Sheng Jing Hospital (CN)
  • Fourth Affiliated Hospital of China Medical University (CN)
Corresponding author
Zhai, Yongzhen
Venue
Frontiers in Aging Neuroscience
Published
2022-04-25
Volume
14
Pages
872134-872134
ISSN
1663-4365 (ISSN-L)
OpenAlex
W4224441906
Cited by
139
References
221
Citations by year
2026: 35 · 2025: 49 · 2024: 35 · 2023: 17 · 2022: 3
FWCI
2.76
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Aging Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
neurodegenerative diseases, neuroinflammation, blood-brain barrier, peripheral immune system, central nervous system, cytokines, microglial activation, astrocytes, immune privilege, neurodegeneration therapy

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