A dramatic increase of C1q protein in the CNS during normal aging

AH Stephan, DV Madison, JM Mateos… - Journal of …, 2013 - Soc Neuroscience
The decline of cognitive function has emerged as one of the greatest health threats of old
age. Age-related cognitive decline is caused by an impacted neuronal circuitry, yet the …

Complement C3-deficient mice fail to display age-related hippocampal decline

Q Shi, KJ Colodner, SB Matousek, K Merry… - Journal of …, 2015 - Soc Neuroscience
The complement system is part of the innate immune response responsible for removing
pathogens and cellular debris, in addition to helping to refine CNS neuronal connections via …

Microglial-derived C1q integrates into neuronal ribonucleoprotein complexes and impacts protein homeostasis in the aging brain

N Scott-Hewitt, M Mahoney, Y Huang, N Korte… - Cell, 2024 - cell.com
Neuroimmune interactions mediate intercellular communication and underlie critical brain
functions. Microglia, CNS-resident macrophages, modulate the brain through direct physical …

[HTML][HTML] Emerging roles of complement protein C1q in neurodegeneration

K Cho - Aging and disease, 2019 - ncbi.nlm.nih.gov
The innate immune system is an ancient and primary component system that rapidly reacts
to defend the body against external pathogens. C1 is the initial responder of classical …

C1q enhances microglial clearance of apoptotic neurons and neuronal blebs, and modulates subsequent inflammatory cytokine production

DA Fraser, K Pisalyaput, AJ Tenner - Journal of neurochemistry, 2010 - Wiley Online Library
J. Neurochem.(2010) 112, 733–743. Abstract The expression of C1q, a recognition molecule
of the complement system, is up‐regulated following neuronal injury and is detected early in …

Cell-specific deletion of C1qa identifies microglia as the dominant source of C1q in mouse brain

MI Fonseca, SH Chu, MX Hernandez, MJ Fang… - Journal of …, 2017 - Springer
Background The complement cascade not only provides protection from infection but can
also mediate destructive inflammation. Complement is also involved in elimination of …

Absence of C1q leads to less neuropathology in transgenic mouse models of Alzheimer's disease

MI Fonseca, J Zhou, M Botto… - Journal of Neuroscience, 2004 - Soc Neuroscience
C1q, the recognition component of the classical complement activation pathway, is a
multifunctional protein known to be expressed in brain of Alzheimer's disease (AD) patients …

Complement protein C1q-mediated neuroprotection is correlated with regulation of neuronal gene and microRNA expression

ME Benoit, AJ Tenner - Journal of Neuroscience, 2011 - Soc Neuroscience
Activation of the complement cascade, a powerful effector mechanism of the innate immune
system, is associated with neuroinflammation but also with elimination of inappropriate …

Complement C3 and C4 expression in C1q sufficient and deficient mouse models of Alzheimer's disease

J Zhou, MI Fonseca, K Pisalyaput… - Journal of …, 2008 - Wiley Online Library
Alzheimer's disease (AD) is a neurodegenerative disease resulting in progressive cognitive
decline. Amyloid plaque deposits consisting specifically of β‐amyloid peptides that have …

Classical complement cascade initiating C1q protein within neurons in the aged rhesus macaque dorsolateral prefrontal cortex

D Datta, SN Leslie, YM Morozov, A Duque… - Journal of …, 2020 - Springer
Background Cognitive impairment in schizophrenia, aging, and Alzheimer's disease is
associated with spine and synapse loss from the dorsolateral prefrontal cortex (dlPFC) layer …