scholarly journals Comparison of the Neuroprotective and Anti-Inflammatory Effects of the Anthocyanin Metabolites, Protocatechuic Acid and 4-Hydroxybenzoic Acid

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Aimee N. Winter ◽  
Matthew C. Brenner ◽  
Noelle Punessen ◽  
Michael Snodgrass ◽  
Caleb Byars ◽  
...  
Keyword(s):  
Phenolic Acids ◽  
Protocatechuic Acid ◽  
Nitrosative Stress ◽  
Structural Characteristics ◽  
Primary Cultures ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Hydroxybenzoic Acid ◽  
The Central Nervous System ◽  
Anti Inflammatory

Anthocyanins are being increasingly investigated for their neuroprotective and antineuroinflammatory effects; however, the overall bioavailability of many anthocyanins is relatively low. In contrast, phenolic acids, metabolites of many polyphenols, including anthocyanins, have been shown to accumulate in tissue at higher concentrations than those of parent compounds, suggesting that these metabolites may be the bioactive components of anthocyanin-rich diets. We examined the neuroprotective capacity of two common phenolic acids, 4-hydroxybenzoic acid (HBA) and protocatechuic acid (PCA), in primary cultures of cerebellar granule neurons. Both HBA and PCA are capable of mitigating oxidative stress induced by hydrogen peroxide, which is thought to contribute to neuronal cell death in neurodegeneration. Under conditions of nitrosative stress, which occur during inflammation in the central nervous system, only PCA was neuroprotective, despite similar structural characteristics between HBA and PCA. Intriguingly, this trend was reversed under conditions of excitotoxicity, in which only HBA was neuroprotective. Lastly, we explored the anti-inflammatory activity of these compounds in microglial cells stimulated with lipopolysaccharide. PCA was an effective anti-inflammatory agent, reducing nitric oxide production, while HBA had no effect. These data indicate that phenolic acids possess distinct neuroprotective and anti-inflammatory characteristics that could make them suitable for the treatment of neurodegeneration.

scholarly journals Anti-inflammatory and Neuroprotective Effects of Fungal Immunomodulatory Protein Involving Microglial Inhibition

2018 ◽  
Vol 19 (11) ◽  
pp. 3678 ◽  
Author(s):  
Wen-Ying Chen ◽  
Cheng-Yi Chang ◽  
Jian-Ri Li ◽  
Jiaan-Der Wang ◽  
Chih-Cheng Wu ◽  
...  
Keyword(s):  
Neurodegenerative Diseases ◽  
Tyrosine Phosphatase ◽  
Primary Cultures ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Neuroprotective Effects ◽  
Fungal Immunomodulatory Protein ◽  
Immunomodulatory Protein ◽  
Anti Inflammatory

Microglia polarization of classical activation state is crucial to the induction of neuroinflammation, and has been implicated in the pathogenesis of numerous neurodegenerative diseases. Fungal immunomodulatory proteins are emerging health-promoting natural substances with multiple pharmacological activities, including immunomodulation. Herein, we investigated the anti-inflammatory and neuroprotective potential of fungal immunomodulatory protein extracted from Ganoderma microsporum (GMI) in an in vitro rodent model of primary cultures. Using primary neuron/glia cultures consisting of neurons, astrocytes, and microglia, a GMI showed an alleviating effect on lipopolysaccharide (LPS)/interferon-γ (IFN-γ)-induced inflammatory mediator production and neuronal cell death. The events of neuroprotection caused by GMI were accompanied by the suppression of Nitric Oxide (NO), Tumor Necrosis Factor-α (TNF-α), Interleukin-1β (IL-1β), and Prostaglandin E2 (PGE2) production, along with the inhibition of microglia activation. Mechanistic studies showed that the suppression of microglia pro-inflammatory polarization by GMI was accompanied by the resolution of oxidative stress, the preservation of protein tyrosine phosphatase and serine/threonine phosphatase activity, and the reduction of NF-κB, AP-1, cyclic AMP response element-binding protein (CREB), along with signal transducers and activators of transcription (Stat1) transcriptional activities and associated upstream activators. These findings suggest that GMI may have considerable potential towards the treatment of neuroinflammation-mediated neurodegenerative diseases.

scholarly journals Neuroprotection Comparison of Rosmarinic Acid and Carnosic Acid in Primary Cultures of Cerebellar Granule Neurons

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2956 ◽  
Author(s):  
Faten Taram ◽  
Elizabeth Ignowski ◽  
Nathan Duval ◽  
Daniel Linseman
Keyword(s):  
Rosmarinic Acid ◽  
Nitrosative Stress ◽  
Primary Cultures ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Carnosic Acid ◽  
Cerebellar Granule Neurons ◽  
Granule Neurons ◽  
Neuroprotective Effects ◽  
Cerebellar Granule

Neurodegenerative disorders such as amyotrophic lateral sclerosis (ALS), Alzheimer’s disease, and Parkinson’s disease, are characterized by the progressive loss of neurons in specific regions of the brain and/or spinal cord. Neuronal cell loss typically occurs by either apoptotic or necrotic mechanisms. Oxidative stress and nitrosative stress, along with excitotoxicity and caspase activation, have all been implicated as major underlying causes of neuronal cell death. Diverse nutraceuticals (bioactive compounds found in common foods) have been shown to have neuroprotective effects in a variety of in vitro and in vivo disease models. In the current study, we compared the neuroprotective effects of two polyphenolic compounds, rosmarinic acid and carnosic acid, which are both found at substantial concentrations in the herb rosemary. The capacity of these compounds to rescue primary cultures of rat cerebellar granule neurons (CGNs) from a variety of stressors was investigated. Both polyphenols significantly reduced CGN death induced by the nitric oxide donor, sodium nitroprusside (nitrosative stress). Rosmarinic acid uniquely protected CGNs from glutamate-induced excitotoxicity, while only carnosic acid rescued CGNs from caspase-dependent apoptosis induced by removal of depolarizing extracellular potassium (5K apoptotic condition). Finally, we found that carnosic acid protects CGNs from 5K-induced apoptosis by activating a phosphatidylinositol 3-kinase (PI3K) pro-survival pathway. The shared and unique neuroprotective effects of these two compounds against diverse modes of neuronal cell death suggest that future preclinical studies should explore the potential complementary effects of these rosemary polyphenols on neurodegenerative disease progression.

scholarly journals Effects of S-2474, a novel nonsteroidal anti-inflammatory drug, on amyloid β protein-induced neuronal cell death

2001 ◽  
Vol 134 (3) ◽  
pp. 673-681 ◽  
Author(s):  
Tatsurou Yagami ◽  
Keiichi Ueda ◽  
Kenji Asakura ◽  
Toshiyuki Sakaeda ◽  
Takayuki Kuroda ◽  
...  
Keyword(s):  
Cell Death ◽  
Neuronal Cell Death ◽  
Amyloid Β ◽  
Neuronal Cell ◽  
Amyloid Β Protein ◽  
Inflammatory Drug ◽  
Β Protein ◽  
Anti Inflammatory

scholarly journals Mesenchymal Stem Cells (MSCs) Coculture Protects [Ca2+]i Orchestrated Oxidant Mediated Damage in Differentiated Neurons In Vitro

Cells ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 250 ◽  
Author(s):  
Adel Alhazzani ◽  
Prasanna Rajagopalan ◽  
Zaher Albarqi ◽  
Anantharam Devaraj ◽  
Mohamed Hessian Mohamed ◽  
...  
Keyword(s):  
Cell Death ◽  
Transforming Growth Factor ◽  
Neuronal Cells ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Apoptotic Cells ◽  
Sequence Of Events ◽  
Cox 2 ◽  
Anti Inflammatory

Cell-therapy modalities using mesenchymal stem (MSCs) in experimental strokes are being investigated due to the role of MSCs in neuroprotection and regeneration. It is necessary to know the sequence of events that occur during stress and how MSCs complement the rescue of neuronal cell death mediated by [Ca2+]i and reactive oxygen species (ROS). In the current study, SH-SY5Y-differentiated neuronal cells were subjected to in vitro cerebral ischemia-like stress and were experimentally rescued from cell death using an MSCs/neuronal cell coculture model. Neuronal cell death was characterized by the induction of proinflammatory tumor necrosis factor (TNF)-α, interleukin (IL)-1β and -12, up to 35-fold with corresponding downregulation of anti-inflammatory cytokine transforming growth factor (TGF)-β, IL-6 and -10 by approximately 1 to 7 fold. Increased intracellular calcium [Ca2+]i and ROS clearly reaffirmed oxidative stress-mediated apoptosis, while upregulation of nuclear factor NF-B and cyclo-oxygenase (COX)-2 expressions, along with ~41% accumulation of early and late phase apoptotic cells, confirmed ischemic stress-mediated cell death. Stressed neuronal cells were rescued from death when cocultured with MSCs via increased expression of anti-inflammatory cytokines (TGF-β, 17%; IL-6, 4%; and IL-10, 13%), significantly downregulated NF-B and proinflammatory COX-2 expression. Further accumulation of early and late apoptotic cells was diminished to 23%, while corresponding cell death decreased from 40% to 17%. Low superoxide dismutase 1 (SOD1) expression at the mRNA level was rescued by MSCs coculture, while no significant changes were observed with catalase (CAT) and glutathione peroxidase (GPx). Interestingly, increased serotonin release into the culture supernatant was proportionate to the elevated [Ca2+]i and corresponding ROS, which were later rescued by the MSCs coculture to near normalcy. Taken together, all of these results primarily support MSCs-mediated modulation of stressed neuronal cell survival in vitro.

scholarly journals Formulated Chinese Medicine Shaoyao Gancao Tang Reduces Tau Aggregation and Exerts Neuroprotection through Anti-Oxidation and Anti-Inflammation

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
I-Cheng Chen ◽  
Te-Hsien Lin ◽  
Yu-Hsuan Hsieh ◽  
Chih-Ying Chao ◽  
Yih-Ru Wu ◽  
...  
Keyword(s):  
Cell Model ◽  
Neuronal Cell Death ◽  
Herbal Medicines ◽  
Neuronal Cell ◽  
Tau Proteins ◽  
No Production ◽  
Study Results ◽  
Apoptosis Protein ◽  
Anti Inflammatory ◽  
Protein Array Analysis

Misfolded tau proteins induce accumulation of free radicals and promote neuroinflammation by activating microglia-releasing proinflammatory cytokines, leading to neuronal cell death. Traditional Chinese herbal medicines (CHMs) have been widely used in clinical practice to treat neurodegenerative diseases associated with oxidative stress and neuroinflammation. This study examined the neuroprotection effects of formulated CHMs Bai-Shao (made of Paeonia lactiflora), Gan-Cao (made of Glycyrrhiza uralensis), and Shaoyao Gancao Tang (SG-Tang, made of P. lactiflora and G. uralensis at 1 : 1 ratio) in cell model of tauopathy. Our results showed that SG-Tang displayed a greater antioxidative and antiaggregation effect than Bai-Shao and Gan-Cao and a stronger anti-inflammatory activity than Bai-Shao but similar to Gan-Cao. In inducible 293/SH-SY5Y cells expressing proaggregant human tau repeat domain (ΔK280 tauRD), SG-Tang reduced tau misfolding and reactive oxygen species (ROS) level in ΔK280 tauRD 293 cells and promoted neurite outgrowth in ΔK280 tauRD SH-SY5Y cells. Furthermore, SG-Tang displayed anti-inflammatory effects by reducing nitric oxide (NO) production in mouse BV-2 microglia and increased cell viability of ΔK280 tauRD-expressing SH-SY5Y cells inflamed by BV-2 conditioned medium. To uncover the neuroprotective mechanisms of SG-Tang, apoptosis protein array analysis of inflamed tau expressing SH-SY5Y cells was conducted and the suppression of proapoptotic proteins was confirmed. In conclusion, SG-Tang displays neuroprotection by exerting antioxidative and anti-inflammatory activities to suppress neuronal apoptosis in human tau cell models. The study results lay the base for future applications of SG-Tang on tau animal models to validate its effect of reducing tau misfolding and potential disease modification.

scholarly journals Peroxiredoxin 5 Inhibits Glutamate-Induced Neuronal Cell Death through the Regulation of Calcineurin-Dependent Mitochondrial Dynamics in HT22 Cells

2019 ◽  
Vol 39 (20) ◽  
Author(s):  
Mi Hye Kim ◽  
Hong Jun Lee ◽  
Sang-Rae Lee ◽  
Hyun-Shik Lee ◽  
Jae-Won Huh ◽  
...  
Keyword(s):  
Cell Death ◽  
Neurodegenerative Diseases ◽  
Mitochondrial Dynamics ◽  
Mitochondrial Fission ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Glutamate Toxicity ◽  
Ht22 Cells ◽  
Peroxidase Enzyme ◽  
The Central Nervous System

ABSTRACT Glutamate is an essential neurotransmitter in the central nervous system (CNS). However, high glutamate concentrations can lead to neurodegenerative diseases. A hallmark of glutamate toxicity is high levels of reactive oxygen species (ROS), which can trigger Ca2+ influx and dynamin-related protein 1 (Drp1)-mediated mitochondrial fission. Peroxiredoxin 5 (Prx5) is a well-known cysteine-dependent peroxidase enzyme. However, the precise effects of Prx5 on glutamate toxicity are still unclear. In this study, we investigated the role of Prx5 in glutamate-induced neuronal cell death. We found that glutamate treatment induces endogenous Prx5 expression and Ca2+/calcineurin-dependent dephosphorylation of Drp1, resulting in mitochondrial fission and neuronal cell death. Our results indicate that Prx5 inhibits glutamate-induced mitochondrial fission through the regulation of Ca2+/calcineurin-dependent dephosphorylation of Drp1, and it does so by scavenging cytosolic and mitochondrial ROS. Therefore, we suggest that Ca2+/calcineurin-dependent mitochondrial dynamics are deeply associated with glutamate-induced neurotoxicity. Consequently, Prx5 may be used as a potential agent for developing therapies against glutamate-induced neurotoxicity and neurodegenerative diseases where it plays a key role.

scholarly journals Peroxisome Proliferator-Activated Receptors: “Key” Regulators of Neuroinflammation after Traumatic Brain Injury

PPAR Research ◽  
2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
Philip F. Stahel ◽  
Wade R. Smith ◽  
Jay Bruchis ◽  
Craig H. Rabb
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Neuronal Cell Death ◽  
Synthetic Cannabinoids ◽  
Experimental Studies ◽  
Neuronal Cell ◽  
Peroxisome Proliferator ◽  
Therapeutic Concept ◽  
Anti Inflammatory ◽  
Peroxisome Proliferator Activated Receptors

Traumatic brain injury is characterized by neuroinflammatory pathological sequelae which contribute to brain edema and delayed neuronal cell death. Until present, no specific pharmacological compound has been found, which attenuates these pathophysiological events and improves the outcome after head injury. Recent experimental studies suggest that targeting peroxisome proliferator-activated receptors (PPARs) may represent a new anti-inflammatory therapeutic concept for traumatic brain injury. PPARs are “key” transcription factors which inhibit NFκBactivity and downstream transcription products, such as proinflammatory and proapoptotic cytokines. The present review outlines our current understanding of PPAR-mediated neuroprotective mechanisms in the injured brain and discusses potential future anti-inflammatory strategies for head-injured patients, with an emphasis on the putative beneficial combination therapy of synthetic cannabinoids (e.g., dexanabinol) with PPARαagonists (e.g., fenofibrate).

Protective peptides derived from novel glial proteins

2000 ◽  
Vol 28 (4) ◽  
pp. 452-455 ◽  
Author(s):  
D. E. Brenneman ◽  
C. Y. Spong ◽  
I. Gozes
Keyword(s):  
Oxidative Stress ◽  
Central Nervous System ◽  
Nervous System ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Short Peptides ◽  
Significant Efficacy ◽  
The Central Nervous System ◽  
Human Neurodegenerative Disease

In studying the mediators of VIP neurotrophism in the central nervous system, two glial proteins have been discovered. Both of these proteins contain short peptides that exhibit femtomolar potency in preventing neuronal cell death from a wide variety of neurotoxic substances. Extension of these peptides to models of oxidative stress or neurodegeneration in vivo have indicated significant efficacy in protection. These peptides, both as individual agents and in combination, have promise as possible protective agents in the treatment of human neurodegenerative disease and in pathologies involving oxidative stress.

scholarly journals UPEI-400, a Conjugate of Lipoic Acid and Scopoletin, Mediates Neuroprotection in a Rat Model of Ischemia/Reperfusion

2016 ◽  
Author(s):  
Barry J. Connell ◽  
Monique C. Saleh ◽  
Desikan Rajagopal ◽  
Tarek M. Saleh
Keyword(s):  
Cell Death ◽  
Lipoic Acid ◽  
Ischemia Reperfusion ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Covalent Bond ◽  
Male Rats ◽  
In Vivo Model ◽  
Naturally Occurring ◽  
Anti Inflammatory

Background: Previously, our laboratory has provided evidence that pre-administration of the antioxidant, lipoic acid covalently bonded to various naturally occurring antioxidants, enhanced neuroprotective capacity compared to the administration of lipoic acid on its own. The naturally occurring compound scopoletin, a coumarin derivative, has been shown in various in vitro studies to have both antioxidant and anti-inflammatory mechanism of actions. To date, the effect of scopoletin on neuronal cell death in an in vivo model of ischemia or ischemia-reperfusion has not been investigated. Therefore, the present investigation was designed to determine if scopoletin on its own, or a co-drug consisting of lipoic acid and scopoletin covalent bond, named UPEI-400, would be capable of demonstrating a similar neuroprotective efficacy. Methods: Using a rodent model of stroke in male rats (anesthetized with Inactin®; 100 mg/kg, iv), the middle cerebral artery was permanently occluded for 6 hours (pMCAO), or in separate animals, occluded for 30 min followed by 5.5 hrs of reperfusion (ischemia/reperfusion; I/R). Results: Pre-administration of either scopoletin or UPEI-400 significantly decreased infarct volume in the I/R model (p<0.05), but not in the pMCAO model of stroke. However, UPEI-400 was ~1000 times more potent as compared to scopoletin on its own. The optimal dose of UPEI-400 was then injected during the occlusion and at several time points during reperfusion and significant neuroprotection was observed for up to 150 mins following the start of reperfusion (p<0.05). Conclusion: The data suggest that synthetic combination of scopoletin with lipoic acid (UPEI-400) is a more effective neuroprotectant that either compound on their own. Also, since UPEI-400 was only effective in a model of I/R, it is possible that it may act to enhance neuronal antioxidant capacity and/or upregulate anti-inflammatory pathways to prevent the neuronal cell death.

scholarly journals Oncogenic BRAF V600E induces glial proliferation through ERK and neuronal death through JNK

2021 ◽  
Author(s):  
Qing Ye ◽  
Nasser Al-Kuwari ◽  
Pranay Srivast ◽  
Xiqun Chen
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Cell Death ◽  
Glial Cells ◽  
Primary Cultures ◽  
Neuronal Cell Death ◽  
Neuronal Cell ◽  
Braf V600e ◽  
Downstream Effectors ◽  
Mutational Activation

Abstract Background Activating V600E in BRAF is a common driver mutation in cancers of multiple tissue origins, including melanoma and glioma. BRAFV600E has also been implicated in neurodegeneration. The present study aims to characterize BRAFV600E on cell death and survival in three major cell types of the CNS: neurons, astrocytes, and microglia. Methods Multiple primary cultures and cell lines of glial cells and neurons were employed. BRAFV600E as well as BRAFWT expression was mediated by lentivirus or retrovirus. Blockage of downstream effectors were achieved by siRNA. Gene expression data from patients with Parkinson’s disease was analyzed. Results In astrocytes and microglia, BRAFV600E induces cell proliferation, and the proliferative effect in microglia is mediated by activated ERK but not JNK. Conditioned medium from BRAFV600E-expressing microglia induced neuronal cell death. In neuronal cells, BRAFV600E directly induces cell death, through JNK but not ERK. We further show that BRAF-related genes are enriched in pathways in patients with Parkinson’s disease. Conclusions Our study identifies distinct consequences mediated by distinct downstream effectors in dividing glial cells and in neurons following the same BRAF mutational activation and a causal link between BRAF-activated microglia and neuronal cell death that does not require physical proximity. It provides insight into a possibly important role of BRAF in neurodegeneration as a result of either dysregulated BRAF in neurons or its impact on glial cells.

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