Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease (AD). Icariside II (ICS II) is known to confer notable therapeutic effects against a variety of neurodegenerative diseases, such as AD. Therefore, the present study aimed to evaluate the possible effects of ICS II on 1-methyl-4-phenylpyridinium (MPP)-induced SK-N-SH cell injury, in addition to understanding the underlying mechanism of action. The MPP-induced SK-N-SH cell model was used to simulate PD . The viability and mitochondrial membrane potential of SK-N-SH cells were detected by MTT assay and JC-1 staining, respectively. Lactate dehydrogenase (LDH) release, ATP levels and complex I activity in treated SK-N-SH cells were measured using LDH activity, ATP and Complex I assay kits, respectively. The protein expression levels of histone deacetylase 2 (HDAC2) and γ-H2A histone family member X and the copy number of mitochondrial DNA were measured by western blotting or reverse transcription-quantitative PCR, respectively. Autodock 4.2 was used to predict the molecular docking site of ICS II on HDAC2. The results of the present study demonstrated that ICS II mitigated SK-N-SH cytotoxicity induced by MPP. Specifically, ICS II alleviated DNA damage and restored mitochondrial function in SK-N-SH cells treated with MPP. In addition, ICS II reduced the HDAC2 protein expression levels in MPP-induced SK-N-SH cells. However, overexpression of HDAC2 reversed the protective effects of ICS II on DNA damage and mitochondrial dysfunction in MPP-induced SK-N-SH cells. In conclusion, the results of the present study suggest that ICS II can protect dopaminergic neurons from MPP-induced neurotoxicity by downregulating HDAC2 expression to restore mitochondrial function.
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http://dx.doi.org/10.3892/etm.2023.12328 | DOI Listing |
Probiotics Antimicrob Proteins
January 2025
Department of Cell and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran.
Heat-killed lactobacilli seem to have protective effects against oxidative stress and neurotoxicity. This study aimed to evaluate the antioxidant properties of specific heat-killed lactobacilli extracts and determine their neuroprotective effects against the neurotoxicity induced by blood plasma from people with multiple sclerosis (MS). The antioxidant activity of the three heat-killed lactobacilli was measured using the DPPH assay.
View Article and Find Full Text PDFAntioxidants (Basel)
December 2024
Department of Nutrition, Chung Shan Medical University, Taichung 402, Taiwan.
Spinocerebellar ataxia type 3 (SCA3), caused by the abnormal expansion of polyglutamine (polyQ) in the ataxin-3 protein, is one of the inherited polyQ neurodegenerative diseases that share similar genetic and molecular features. Mutant polyQ-expanded ataxin-3 protein is prone to aggregation in affected neurons and is predominantly degraded by autophagy, which is beneficial for neurodegenerative disease treatment. Not only does mutant polyQ-expanded ataxin-3 increase susceptibility to oxidative cytotoxicity, but it also hampers antioxidant potency in neuronal cells.
View Article and Find Full Text PDFJ Med Virol
January 2025
Infection and Immunity Research Strength, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Selangor, Malaysia.
The two most clinically important members of the flavivirus genus, Zika virus (ZIKV) and dengue virus (DENV) pose a significant public health challenge. They cause a range of diseases in humans, from hemorrhagic to neurological manifestations, leading to economic and social burden worldwide. Nevertheless, there are no approved antiviral drugs to treat these infections.
View Article and Find Full Text PDFFront Biosci (Landmark Ed)
November 2024
Department of Neurology, The Second Affiliated Hospital of Nantong University, 226001 Nantong, Jiangsu, China.
Background: Vitamin D receptor (VDR) can prevent myocardial ischemia reperfusion injury (MIRI). Hence, we aimed to illuminate the effect of VDR on cerebral ischemia/reperfusion injury (CIRI).
Methods: C57BL/6 mice and SK-N-SH cells were utilized to establish CIRI and cellular oxygen deprivation/reoxygenation (OGD/R) models.
Discov Oncol
November 2024
Department of Pediatric Surgery, The Affiliated Taian City Central Hospital of Qingdao University, No.29 Longtan Road, Taishan District, Taian, 271000, Shandong Province, People's Republic of China.
Background: Neuroblastoma (NB), the most common extracranial solid tumor in children, is featured by high malignancy and poor prognosis. Flavokawain A (FKA), a novel chalcone isolated from the roots of the kava plant, has been identified to exert the tumor-inhibiting properties in various cancers. The present study was formulated to tell about the anticarcinogenic effects of FKA against NB and to thoroughly elucidate the intrinsic molecular mechanisms.
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