Abstract:
:Accumulating studies suggest that neuroinflammation characterized by microglial overactivation plays a pivotal role in the pathogenesis of Parkinson's disease. As such, inhibition of microglial overactivation might be a promising treatment strategy to delay the onset or slow the progression of Parkinson's disease. Ginsenoside Rb1, the most active ingredient of ginseng, reportedly exerts neuroprotective effects by suppressing inflammation in vitro. The present study aimed to evaluate the neuroprotective and anti-inflammatory effects of ginsenoside Rb1 in a lipopolysaccharide-induced rat Parkinson's disease model. Rats were divided into four groups. In the control group, sham-operated rats were intraperitoneally administered normal saline for 14 consecutive days. In the ginsenoside Rb1 group, ginsenoside Rb1 (20 mg/kg) was intraperitoneally injected for 14 consecutive days after sham surgery. In the lipopolysaccharide group, a single dose of lipopolysaccharide was unilaterally microinjected into the rat substantial nigra to establish the Parkinson's disease model. Lipopolysaccharide-injected rats were treated with normal saline for 14 consecutive days. In the ginsenoside Rb1 + lipopolysaccharide group, lipopolysaccharide was unilaterally microinjected into the rat substantial nigra. Subsequently, ginsenoside Rb1 was intraperitoneally injected for 14 consecutive days. To investigate the therapeutic effects of ginsenoside Rb1, behavioral tests were performed on day 15 after lipopolysaccharide injection. We found that ginsenoside Rb1 treatment remarkably reduced apomorphine-induced rotations in lipopolysaccharide-treated rats compared with the lipopolysaccharide group. To investigate the neurotoxicity of lipopolysaccharide and potential protective effect of ginsenoside Rb1, contents of dopamine and its metabolites in the striatum were measured by high-performance liquid chromatography. Compared with the lipopolysaccharide group, ginsenoside Rb1 obviously attenuated the lipopolysaccharide-induced depletion of dopamine and its metabolites in the striatum. To further explore the neuroprotective effect of ginsenoside Rb1 against lipopolysaccharide-induced neurotoxicity, immunohistochemistry and western blot assay of tyrosine hydroxylase were performed to evaluate dopaminergic neuron degeneration in the substantial nigra par compacta. The results showed that lipopolysaccharide injection caused a large loss of tyrosine hydroxylase-immunoreactive neurons in the substantia nigra and a significant decrease in overall tyrosine hydroxylase expression. However, ginsenoside Rb1 noticeably reversed these changes. To investigate whether the neuroprotective effect of ginsenoside Rb1 was associated with inhibition of lipopolysaccharide-induced microglial activation, we examined expression of the microglia marker Iba-1. Our results confirmed that lipopolysaccharide injection induced a significant increase in Iba-1 expression in the substantia nigra; however, ginsenoside Rb1 effectively suppressed lipopolysaccharide-induced microglial overactivation. To elucidate the inhibitory mechanism of ginsenoside Rb1, we examined expression levels of inflammatory mediators (tumor necrosis factor-α, interleukin-1β, inducible nitric oxide synthase, and cyclooxygenase 2) and phosphorylation of nuclear factor kappa B signaling-related proteins (IκB, IKK) in the substantia nigra with enzyme-linked immunosorbent and western blot assays. Our results revealed that compared with the control group, phosphorylation and expression of inflammatory mediators IκB and IKK in the substantia nigra of lipopolysaccharide group rats were significantly increased; whereas, ginsenoside Rb1 obviously reduced lipopolysaccharide-induced changes on the lesioned side of the substantial nigra par compacta. These findings confirm that ginsenoside Rb1 can inhibit inflammation induced by lipopolysaccharide injection into the substantia nigra and protect dopaminergic neurons, which may be related to its inhibition of the nuclear factor kappa B signaling pathway. This study was approved by the Experimental Animal Ethics Committee of Shandong University of China in April 2016 (approval No. KYLL-2016-0148).
journal_name
Neural Regen Resjournal_title
Neural regeneration researchauthors
Li DW,Zhou FZ,Sun XC,Li SC,Yang JB,Sun HH,Wang AHdoi
10.4103/1673-5374.257536subject
Has Abstractpub_date
2019-10-01 00:00:00pages
1814-1822issue
10eissn
1673-5374issn
1876-7958pii
NeuralRegenRes_2019_14_10_1814_257536journal_volume
14pub_type
杂志文章abstract::The mechanism involved in neural regeneration after spinal cord injury is unclear. The myelin-derived protein Nogo-A, which is specific to the central nervous system, has been identified to negatively affect the cytoskeleton and growth program of axotomized neurons. Studies have shown that Nogo-A exerts immediate and ...
journal_title:Neural regeneration research
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doi:10.4103/1673-5374.152375
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abstract::Cattle encephalon glycoside and ignotin (CEGI) injection is known as a multi-target neuroprotective drug that contains numerous liposoluble molecules, such as polypeptides, monosialotetrahexosyl ganglioside (GM-1), free amino acids, hypoxanthine and carnosine. CEGI has been approved by the Chinese State Food and Drug ...
journal_title:Neural regeneration research
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abstract::Polysaccharides extracted from Lycium barbarum exhibit antioxidant properties. We hypothesized that these polysaccharides resist oxidative stress-induced neuronal damage following cavernous nerve injury. In this study, rat models were intragastrically administered Lycium barbarum polysaccharides for 2 weeks at 1, 7, a...
journal_title:Neural regeneration research
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doi:10.4103/1673-5374.189197
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abstract::The influence of duration of immobilization and postoperative sensory re-education on the final outcome after reconstruction of digital nerves with direct suture or muscle-in-vein conduits was investigated. The final sensory outcome of 35 patients with 41 digital nerve injuries, who either underwent a direct suture (D...
journal_title:Neural regeneration research
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doi:10.4103/1673-5374.169638
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abstract::Traumatic brain injury can cause loss of neuronal tissue, remote symptomatic epilepsy, and cognitive deficits. However, the mechanisms underlying the effects of traumatic brain injury are not yet clear. Hippocampal excitability is strongly correlated with cognitive dysfunction and remote symptomatic epilepsy. In this ...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.238618
更新日期:2018-10-01 00:00:00
abstract::Olive leaves have an antioxidant capacity, and olive leaf extract can protect the blood, spleen and hippocampus in lead-poisoned mice. However, little is known about the effects of olive leaf extract on lead-induced brain injury. This study was designed to determine whether olive leaf extract can inhibit lead-induced ...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2013.22.001
更新日期:2013-08-05 00:00:00
abstract::The present study investigated the influence of anti-estrogen treatment (fulvestrant) on pituitary adenoma cell line GH3 biological activity, the estrogen receptor α pathway, the WnT pathway, and mechanisms of decreased Wnt inhibitory factor-1 expression in GH3 cells. Results showed that fulvestrant suppressed GH3 cel...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2012.04.008
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abstract::Acupuncture has been shown to ameliorate cognitive impairment of Alzheimer's disease. Acupoints and stimulation frequency influence the therapeutic effect of electroacupuncture. Rat models of Alzheimer's disease were established by injecting amyloid beta 1-42 (Aβ1-42) into the bilateral lateral ventricles. Electroacup...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.238620
更新日期:2018-10-01 00:00:00
abstract::The present study recruited 193 patients with ischemic cerebrovascular disease from Inpatient and Outpatient Departments at the Affiliated Hospital of Qingdao University Medical College, China from August 2008 to May 2010, as well as 120 healthy volunteers from the Medical Examination Center at the Affiliated Hospital...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2012.07.009
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abstract::Alzheimer's disease (AD) is the most common form of dementia in the older population, however, the precise cause of the disease is unknown. The neuropathology is characterized by the presence of aggregates formed by amyloid-β (Aβ) peptide and phosphorylated tau; which is accompanied by progressive impairment of memory...
journal_title:Neural regeneration research
pub_type: 杂志文章,评审
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更新日期:2018-10-01 00:00:00
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journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.228728
更新日期:2018-03-01 00:00:00
abstract::Ciliary neurotrophic factor is the only known neurotrophic factor that can promote differentiation of hippocampal neural progenitor cells to glial cells and neurons in adult rats. This process is similar to spontaneous differentiation. Therefore, ciliary neurotrophic factor may be involved in spontaneous differentiati...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2013.04.002
更新日期:2013-02-05 00:00:00
abstract::[This corrects the article DOI: 10.4103/1673-5374.245480]. ...
journal_title:Neural regeneration research
pub_type: 杂志文章,已发布勘误
doi:10.4103/1673-5374.250633
更新日期:2019-06-01 00:00:00
abstract::Human umbilical mesenchymal stem cells from Wharton's jelly of the umbilical cord were induced to differentiate into oligodendrocyte precursor-like cells in vitro. Oligodendrocyte precursor cells were transplanted into contused rat spinal cords. Immunofluorescence double staining indicated that transplanted cells surv...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2013.10.003
更新日期:2013-04-05 00:00:00
abstract::Suture and autologous nerve transplantation are the primary therapeutic measures for completely severed nerves. However, imbalances in the microenvironment and adhesion of surrounding tissues can affect the quality of nerve regeneration and repair. Previous studies have shown that human amniotic membrane can promote t...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.262596
更新日期:2019-12-01 00:00:00
abstract::Cavernous nerve injury is the main cause of erectile dysfunction following radical prostatectomy. The recovery of erectile function following radical prostatectomy remains challenging. Our previous studies found that injecting adipose-derived stem cells (ADSCs) into the cavernosa could repair the damaged cavernous ner...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.264464
更新日期:2020-01-01 00:00:00
abstract::Deferoxamine, a clinically safe drug used for treating iron overload, also repairs spinal cord injury although the mechanism for this action remains unknown. Here, we determined whether deferoxamine was therapeutic in a rat model of spinal cord injury and explored potential mechanisms for this effect. Spinal cord inju...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.208591
更新日期:2017-06-01 00:00:00
abstract::In contrast to astrocytes in mammals, fish astrocytes promote axon regeneration after brain injury and actively participate in the regeneration process. Neurolin, a regeneration-associated, Zn8-labeled protein, is involved in the repair of damaged optic nerve in goldfish. At 1 week after unilateral eye injury, the exp...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.243721
更新日期:2019-01-01 00:00:00
abstract::Anti-inflammatory and anti-oxidant agents can alleviate ischemic cerebral injury. The immunomodulary drug Setarud, which is composed of herbal extracts including Rosa canina, Urtica dioica and Tanacetum vulgare, supplemented with selenium exhibits anti-inflammatory and anti-oxidant properties. Therefore, we hypothesiz...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2012.27.001
更新日期:2012-09-25 00:00:00
abstract::Chalcone is a plant metabolite widely found in fruits, vegetables, spices and tea, and has anti-tumor, anti-inflammation, immunomodulation, antibacterial and anti-oxidation activities, as well as many other pharmacological and biological effects. Our team has shown that its analogs have antioxidant activity, and oxida...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.237140
更新日期:2018-09-01 00:00:00
abstract::The potential impact of human leukocyte antigen (HLA) genotype variations on development of diabetic peripheral neuropathy (DPN) is not well determined. This study aimed to identify the association of HLA class II alleles with DPN in type 2 diabetes (T2D) patients. Totally 106 T2D patients, 49 with DPN and 57 without ...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.194756
更新日期:2016-11-01 00:00:00
abstract::Propofol is a neuroprotective anesthetic. Whether propofol can promote spinal cord injury repair by bone marrow mesenchymal stem cells remains poorly understood. We used rats to investigate spinal cord injury repair using bone marrow mesenchymal stem cell transplantation combined with propofol administration via the t...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.162765
更新日期:2015-08-01 00:00:00
abstract::Recent studies have shown that induced expression of endogenous antioxidative enzymes thr-ough activation of the antioxidant response element/nuclear factor erythroid 2-related factor 2 (Nrf2) pathway may be a neuroprotective strategy. In this study, rat cerebral cortical neurons cultured in vitro were pretreated with...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.153700
更新日期:2015-03-01 00:00:00
abstract::Myelin regeneration is indispensably important for patients suffering from several central nervous system (CNS) disorders such as multiple sclerosis (MS) and spinal cord injury (SCI), because it is not only essential for restoring neurophysiology, but also protects denuded axons for secondary degeneration. Understandi...
journal_title:Neural regeneration research
pub_type: 杂志文章,评审
doi:10.4103/1673-5374.137586
更新日期:2014-07-15 00:00:00
abstract::Stem cell transplantation has brought new hope for the treatment of neurological diseases. The key to stem cell therapy lies in inducing the specific differentiation of stem cells into nerve cells. Because the differentiation of stem cells in vitro and in vivo is affected by multiple factors, the final differentiation...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.251191
更新日期:2019-07-01 00:00:00
abstract::Epithelial-specific ETS-1 (ESE1), a member of the ETS transcription factor family, is widely expressed in multiple tissues and performs various functions in inflammation. During neuroinflammation, ESE1 promotes neuronal apoptosis; however, the expression and biological functions of ESE1 remain unclear after cerebral i...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.249232
更新日期:2019-05-01 00:00:00
abstract::Brain structure and cognitive function change in the temporal lobe, hippocampus, and prefrontal cortex of patients with mild cognitive impairment and Alzheimer's disease, and brain network-connection strength, network efficiency, and nodal attributes are abnormal. However, existing research has only analyzed the diffe...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2013.30.001
更新日期:2013-10-25 00:00:00
abstract::Although Parkinson's disease is the most common neurodegenerative movement disorder, the mechanisms of pathogenesis remain poorly understood. Recent findings have shown that deregulation of the autophagy-lysosome pathway is involved in the pathogenesis of Parkinson's disease. This review summarizes the most recent fin...
journal_title:Neural regeneration research
pub_type: 杂志文章,评审
doi:10.3969/j.issn.1673-5374.2012.02.011
更新日期:2012-01-15 00:00:00
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journal_title:Neural regeneration research
pub_type: 杂志文章,评审
doi:10.4103/1673-5374.198974
更新日期:2017-01-01 00:00:00
abstract::The iron chelator deferoxamine has been shown to inhibit ferroptosis in spinal cord injury. However, it is unclear whether deferoxamine directly protects neurons from ferroptotic cell death. By comparing the survival rate and morphology of primary neurons and SH-SY5Y cells exposed to erastin, it was found that these c...
journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.4103/1673-5374.274344
更新日期:2020-08-01 00:00:00