The Role of Microglia in Human Diseases

A special issue of Biomedicines (ISSN 2227-9059). This special issue belongs to the section "Cell Biology and Pathology".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 2662

Special Issue Editor


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Guest Editor
Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
Interests: human immunodeficiency virus; central nervous system

Special Issue Information

Dear Colleagues,

Microglia are the primary immune cells of the central nervous system (CNS), similar to peripheral macrophages. They produce a strong proliferative response (microgliosis) to pathogens by changing morphology and migrating to the site of infection, where they destroy pathogens and remove damaged cells. These cells play specific roles in determining the progression and outcomes of essentially all CNS diseases. Thus, microglia have ceased to be viewed as an accessory to underlying pathologies and have now taken center stage as a therapeutic target. It would be very important to study  microglia’s involvement in promoting or limiting the pathogenesis of different neuronal diseases, such as amyotrophic lateral sclerosis, Alzheimer’s disease, Huntington’s disease, multiple sclerosis, X-linked adrenoleukodystrophy (X-ALD), lysosomal storage diseases (LSDs), etc.

When the microglia are activated, they take on an amoeboid shape and alter their gene expression, leading to the production of numerous potentially neurotoxic mediators, which are important in the normal functions of microglia and their production. In chronic neuroinflammation, microglia remain activated for an extended period, during which the production of mediators is sustained longer than usual. This secretion contributes to neuronal death.

It is crucial to study different activation phenotypes and other mechanisms of microglia in human brains.

In this Special Issue, we invite manuscripts on the role of microglia in different CNS diseases, other infectious diseases such as HIV-1 and HAND, and additional microglial involvement in the pathogenesis of diverse diseases and therapy-based research studies/reviews.

Dr. Ana Borrajo
Guest Editor

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Published Papers (2 papers)

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Research

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17 pages, 5308 KiB  
Article
Characterization of the circRNA Landscape in Interleukin-4 Induced Anti-Inflammatory Microglia
by Chaoyi Li, Huakun Wang, Yu Tang and Junjiao Wu
Biomedicines 2023, 11(12), 3239; https://doi.org/10.3390/biomedicines11123239 - 07 Dec 2023
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Abstract
Microglia are resident innate immune cells that play an essential role in the development and surveillance of the central nervous system as well as the shared pathogenesis of neurodegenerative diseases. Microglia rapidly respond to multiple inflammatory stimuli and activate towards different phenotypes, such [...] Read more.
Microglia are resident innate immune cells that play an essential role in the development and surveillance of the central nervous system as well as the shared pathogenesis of neurodegenerative diseases. Microglia rapidly respond to multiple inflammatory stimuli and activate towards different phenotypes, such as pro-inflammatory and anti-inflammatory phenotypes. Cytokines, epigenetic and long non-coding RNA modulations have been shown to regulate microglial activation; however, the role of circRNAs in microglia-mediated neuroinflammation remains elusive. Here, we performed circRNA sequencing in IL-4-treated anti-inflammatory microglia and discovered 120 differentially expressed circRNAs. We systemically verified the identities of circRNAs by assays of PCR, RNase R treatment and fluorescent in situ hybridization (FISH), among others. We found that circAdgre1 promoted IL-4-induced anti-inflammatory responses and further conferred neuroprotective effects upon lipopolysaccharide (LPS) stimuli. Taken together, our results show that circRNAs might be possible therapeutic targets for microglia-mediated neuroinflammation and neurodegenerative diseases. Full article
(This article belongs to the Special Issue The Role of Microglia in Human Diseases)
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Review

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20 pages, 1114 KiB  
Review
The Impact of Microglia on Neurodevelopment and Brain Function in Autism
by Yuyi Luo and Zhengbo Wang
Biomedicines 2024, 12(1), 210; https://doi.org/10.3390/biomedicines12010210 - 17 Jan 2024
Cited by 1 | Viewed by 1535
Abstract
Microglia, as one of the main types of glial cells in the central nervous system (CNS), are widely distributed throughout the brain and spinal cord. The normal number and function of microglia are very important for maintaining homeostasis in the CNS. In recent [...] Read more.
Microglia, as one of the main types of glial cells in the central nervous system (CNS), are widely distributed throughout the brain and spinal cord. The normal number and function of microglia are very important for maintaining homeostasis in the CNS. In recent years, scientists have paid widespread attention to the role of microglia in the CNS. Autism spectrum disorder (ASD) is a highly heterogeneous neurodevelopmental disorder, and patients with ASD have severe deficits in behavior, social skills, and communication. Most previous studies on ASD have focused on neuronal pathological changes, such as increased cell proliferation, accelerated neuronal differentiation, impaired synaptic development, and reduced neuronal spontaneous and synchronous activity. Currently, more and more research has found that microglia, as immune cells, can promote neurogenesis and synaptic pruning to maintain CNS homeostasis. They can usually reduce unnecessary synaptic connections early in life. Some researchers have proposed that many pathological phenotypes of ASD may be caused by microglial abnormalities. Based on this, we summarize recent research on microglia in ASD, focusing on the function of microglia and neurodevelopmental abnormalities. We aim to clarify the essential factors influenced by microglia in ASD and explore the possibility of microglia-related pathways as potential research targets for ASD. Full article
(This article belongs to the Special Issue The Role of Microglia in Human Diseases)
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