a(MESH:Microglia)
In addition, anatabine markedly decreased the Iba1 immunostaining in the spinal cord of EAE mice showing that anatabine reduces the infiltration of macrophage/ microglia in the spinal cord of EAE mice (Fig. 10) PubMed:23383175
In addition, anatabine markedly decreased the Iba1 immunostaining in the spinal cord of EAE mice showing that anatabine reduces the infiltration of macrophage/ microglia in the spinal cord of EAE mice (Fig. 10) PubMed:23383175
A statistically significant positive correlation was observed between the amount of GFAP and Iba1 burden in the spinal cord (Pearson correlation = 0.612, P,0.002) whereas negative correlations were observed between the GFAP burden and the Luxol fast blue burden (Pearson correlation =20.525, P= 0.007), and between the IBa1 burden and the Luxol fast blue burden (Pearson correlation =20.609, P =0.001) suggesting that astrogliosis and microgliosis are associated with the loss of myelin in the spinal cord PubMed:23383175
A statistically significant positive correlation was observed between the amount of GFAP and Iba1 burden in the spinal cord (Pearson correlation = 0.612, P,0.002) whereas negative correlations were observed between the GFAP burden and the Luxol fast blue burden (Pearson correlation =20.525, P= 0.007), and between the IBa1 burden and the Luxol fast blue burden (Pearson correlation =20.609, P =0.001) suggesting that astrogliosis and microgliosis are associated with the loss of myelin in the spinal cord PubMed:23383175
Globally, Iba1 immunostaining is significantly increased in the spinal cord of EAE mice compared to control nonimmunized mice (Fig. 10) PubMed:23383175
In controls and anti-aggregant TauRDΔKPP slices, the microglia were mainly in the ramified form, in contrast to the pro-aggregant TauRDΔK slices where microglia were more of the reactive form (Fig 3b) PubMed:29202785
Total numbers of Iba1 positive microglial cells were reduced to 50% in anti-aggregant TauRDΔKPP slices when compared to controls (Fig. 3c, bar 2) PubMed:29202785
The antiaggregant TauRDΔKPP slices had ramified form of microglia with 6-7 branches on an average indicating that the microglial cells were in their normal physiologically active form and there is no sign of inflammation (Fig 3d, bars 1 and 2). PubMed:29202785
In controls and anti-aggregant TauRDΔKPP slices, the microglia were mainly in the ramified form, in contrast to the pro-aggregant TauRDΔK slices where microglia were more of the reactive form (Fig 3b) PubMed:29202785
The opposite result was observed in the pro-aggregant TauRDΔK slices where the microglial number was increased by 100% compared to controls (Fig. 3c, bar 3) PubMed:29202785
On the contrary, microglia in proaggregant TauRDΔK slices, were increased in number and were also observed with 2-3 branches on an average compared to age-matched controls and also the antiaggregant TauRDΔKPP slices (Fig. 3d, bar 3). This indicates that in the pro-aggregant TauRDΔK slices the microglia are in a reactive form, indicating that there is also enhanced inflammation PubMed:29202785
Rosiglitazone, a highaffinity agonist for PPARγ, can clear Aβ by activating microglia and promoting its phagocytosis via increasing the levels of CD36, a receptor expressed in it (Escribano et al. 2010) PubMed:29626319
However, due to the presence of the R47H mutation in AD, TREM2 cannot effectively recognize the lipid ligands and then fails to activate microglia, which leads to Aβ deposition (Jiang et al. 2014a; Jiang et al. 2013) PubMed:29626319
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
By contrast, the parenchyma of the CNS is devoid of lymphatic vasculature2; in the brain, removal of cellular debris and toxic molecules, such as amyloid-β peptides, is mediated by a combination of transcellular transport mechanisms across the blood−brain and blood−cerebrospinal fluid (CSF) barriers7–9, phagocytosis and digestion by resident microglia and recruited monocytes and/or macrophages10,11, as well as CSF influx and ISF efflux through a paravascular (glymphatic) route12–14 PubMed:30046111
We next tested the impact of anatabine on STAT3 and p65 NFkB phosphorylation induced by a 24 h treatment with LPS on human microglial cells, a cell type known to express alpha7-nicotinic acetylcholine receptor subtype (Suzuki et al., 2006) PubMed:23178521
A statistically significant positive correlation was observed between the amount of GFAP and Iba1 burden in the spinal cord (Pearson correlation = 0.612, P,0.002) whereas negative correlations were observed between the GFAP burden and the Luxol fast blue burden (Pearson correlation =20.525, P= 0.007), and between the IBa1 burden and the Luxol fast blue burden (Pearson correlation =20.609, P =0.001) suggesting that astrogliosis and microgliosis are associated with the loss of myelin in the spinal cord PubMed:23383175
A statistically significant positive correlation was observed between the amount of GFAP and Iba1 burden in the spinal cord (Pearson correlation = 0.612, P,0.002) whereas negative correlations were observed between the GFAP burden and the Luxol fast blue burden (Pearson correlation =20.525, P= 0.007), and between the IBa1 burden and the Luxol fast blue burden (Pearson correlation =20.609, P =0.001) suggesting that astrogliosis and microgliosis are associated with the loss of myelin in the spinal cord PubMed:23383175
In controls and anti-aggregant TauRDΔKPP slices, the microglia were mainly in the ramified form, in contrast to the pro-aggregant TauRDΔK slices where microglia were more of the reactive form (Fig 3b) PubMed:29202785
In controls and anti-aggregant TauRDΔKPP slices, the microglia were mainly in the ramified form, in contrast to the pro-aggregant TauRDΔK slices where microglia were more of the reactive form (Fig 3b) PubMed:29202785
On the contrary, microglia in proaggregant TauRDΔK slices, were increased in number and were also observed with 2-3 branches on an average compared to age-matched controls and also the antiaggregant TauRDΔKPP slices (Fig. 3d, bar 3). This indicates that in the pro-aggregant TauRDΔK slices the microglia are in a reactive form, indicating that there is also enhanced inflammation PubMed:29202785
Specifically, ISF Aβ can be taken up by microglia and astrocytes, whereas perivascular Aβ can be degraded by vascular smooth muscle cells, perivascular macrophages, and astrocytes PubMed:26195256
Activated microglia has a double effect on AD progression (Li et al. 2014). On the one hand, they can release some proinflammatory cytokines, stimulating inflammatory response and ultimately leading to neuronal injuries and death PubMed:29626319
Microglia, one type of glial cells, the equivalent of the macrophages that exist in the brain and spinal cord, is the first and also the main line of immune defense in CNS PubMed:29626319
Activated microglia has a double effect on AD progression (Li et al. 2014). On the one hand, they can release some proinflammatory cytokines, stimulating inflammatory response and ultimately leading to neuronal injuries and death PubMed:29626319
Activated microglia has a double effect on AD progression (Li et al. 2014). On the one hand, they can release some proinflammatory cytokines, stimulating inflammatory response and ultimately leading to neuronal injuries and death PubMed:29626319
On the other hand, they may show beneficial effects via facilitating aberrant protein clearance by means of microglial migration to the damaged, aberrant area, and phagocytosis of unnecessary materials in the early stages of AD PubMed:29626319
Microglial cells, the key immune cells of the brain, play an important part in the phagocytosis of Aβ PubMed:29626319
N2a cells over-expressing tau (Wang et al., 2017) and microglia also release tau in an exosome-dependent manner PubMed:29238289
In AD, microglial cells and astrocytes express NLRP3, which in turn can detect A beta plaques and act by secreting caspase-1 to activate IL-1 beta and IL- 18 [23–25]. PubMed:27314526
P2X7 expressed by microglial cells will also activate the NLP3 inflammasome [30, 32] and the expression of P2X7 is likely to be increased in AD brains [35]. PubMed:27314526
Pattern recognition receptors such as the TLR4 receptor are expressed in the brain’s own immune cells like microglia and astrocytes that induce inflammation via cytokine secretion [38]. PubMed:27314526
We reasoned that microglia and other cell types in the hippocampus might act as mediators for the cytotoxicity caused by TauRDΔK oligomers, which could explain why cytotoxicity was not observed in the cell culture systems. PubMed:28528849
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Amyloid-β also induces microglial activation that results in NF-κB – induced expression of pro-inflammatory cytokines such as TNFα, IL1β, IL6, and IL8 from the microglia resulting in neuronal death PubMed:28745240
Excessive accumulation of Aβ1-42 stimulates microglial cells by signaling via receptor associated advanced glycation end products (RAGE) and peroxisome proliferator-activated receptor-γ (PPAR-γ), phosphorylates IKK proteins, and enhances NF-κB mediated transactivation of inflammatory cytokines and neurotoxic molecules such as glutamate and reactive oxygen species (ROS)/induced nitric oxide synthase (iNOS) [12] (Fig 2B) PubMed:25652642
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