Adult neurogenesis was one of the most important discoveries of the last century, helping us to better understand brain function. Researchers recently discovered that microglia play an important role in this process. However, various questions remain concerning where, at what stage, and what types of microglia participate. In this review, we demonstrate that certain pools of microglia are determinant cells in different phases of the generation of new neurons. This sheds light on how cells cooperate in order to fine tune brain organization. It also provides us with a better understanding of distinct neuronal pathologies.
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http://dx.doi.org/10.3390/brainsci11050658 | DOI Listing |
Mol Neurodegener
January 2025
Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA.
TREM2 is a signaling receptor expressed on microglia that has emerged as an important drug target for Alzheimer's disease and other neurodegenerative diseases. While a number of TREM2 ligands have been identified, little is known regarding the structural details of how they engage. To better understand this, we created a protein library of 28 different TREM2 variants that could be used to map interactions with various ligands using biolayer interferometry.
View Article and Find Full Text PDFMol Med
January 2025
Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China.
Background: Chronic rhinosinusitis (CRS) is a global health issue, with some patients experiencing anxiety and depression-like symptoms. This study investigates the role of HMGB1 in anxiety and depression-like behaviors associated with the microglial Notch1/Hes-1 pathway in CRS mice.
Methods: A CRS mouse model was developed, and behavioral assessments were conducted to evaluate anxiety and depression-like behaviors.
Alzheimers Dement
December 2024
NeuroGenomics & Informatics Center, St. Louis, MO, USA
Background: Changes in Amyloid‐β (A) and hyperphosphorylated Tau (T) in the brain and cerebrospinal fluid (CSF) precedes AD symptoms, making the CSF proteome a potential avenue to understand disease pathophysiology and facilitate reliable diagnostics and therapies.
Method: We used the Somascan assay for measuring the protein levels of 7,029 analytes in CSF of 2,286 participants from four different cohorts. We employed a three‐stage analytical approach (discovery, replication, and meta‐analysis).
Alzheimers Dement
December 2024
LC Campbell Cognitive Neurology Research Unit, Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
Background: In‐vivo PET imaging studies have demonstrated neuroinflammation (microglia reactivity) in the neocortex of Alzheimer’s disease (AD) patients. However, the extent and implication of microglia reactivity in white matter regions remains unclear. Here, we explored microglia reactivity in white matter using PET imaging of the translocator protein (TSPO) in relation to core AD biomarkers (amyloid, tau, and astrogliosis), microstructural damage, and cognitive decline.
View Article and Find Full Text PDFBackground: Alzheimer’s disease is a devastating neurodegenerative disorder with a complex pathogenesis. One main pathological feature utilised in diagnosis is neurodegeneration or neuronal injury, which is reflected in reductions in cerebral glucose metabolism measured by [18F]Fluorodeoxyglucose ([18F]FDG) positron emission tomography (PET). Here we evaluated the involvement of glial reactivity measured with magnetic resonance spectroscopy (MRS) and cerebral blood flow measured with arterial spin labelling (ASL) on [18F]FDG PET as a measure of cerebral glucose metabolism.
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