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https://www.readbyqxmd.com/read/29331741/extracellular-acidification-induces-ros-and-mptp-mediated-death-in-hek293-cells
#1
José Teixeira, Farhan Basit, Herman G Swarts, Marleen Forkink, Paulo J Oliveira, Peter H G M Willems, Werner J H Koopman
The extracellular pH (pHe) is a key determinant of the cellular (micro)environment and needs to be maintained within strict boundaries to allow normal cell function. Here we used HEK293 cells to study the effects of pHe acidification (24h), induced by mitochondrial inhibitors (rotenone, antimycin A) and/or extracellular HCl addition. Lowering pHe from 7.2 to 5.8 reduced cell viability by 70% and was paralleled by a decrease in cytosolic pH (pHc), hyperpolarization of the mitochondrial membrane potential (Δψ), increased levels of hydroethidine-oxidizing ROS and stimulation of protein carbonylation...
December 30, 2017: Redox Biology
https://www.readbyqxmd.com/read/29331484/novel-biomolecular-information-in-rotenone-induced-cellular-model-of-parkinson-s-disease
#2
D Lin, Y Liang, D Zheng, Y Chen, X Jing, M Lei, Z Zeng, T Zhou, X Wu, S Peng, K Huang, L Yang, S Xiao, J Liu, E Tao
In order to uncover the remarkable pathogenic genes or molecular pathological process in Parkinson's disease (PD), we employed a microarray analysis upon the cellular PD model induced by rotenone. Compared to the control group, 2174 genes were screened out to be expressed differently in the rotenone-induced group by certain criterion. GO analysis and the pathways analysis showed the significant enrichment of genes that were associated with the biological process of cell cycle, apoptotic process, organelle fusion, mitochondrial lesion, endoplasmic reticulum stress and so on...
January 10, 2018: Gene
https://www.readbyqxmd.com/read/29327204/neuroprotective-effects-of-filgrastim-in-rotenone-induced-parkinson-s-disease-in-rats-insights-into-its-anti-inflammatory-neurotrophic-and-antiapoptotic-effects
#3
Mariama S Azmy, Esther T Menze, Reem N El-Naga, Mariane G Tadros
All current treatments of Parkinson's disease (PD) focus on enhancing the dopaminergic effects and providing symptomatic relief; however, they cannot delay the disease progression. Filgrastim, a recombinant methionyl granulocyte colony-stimulating factor, demonstrated neuroprotection in many neurodegenerative and neurological diseases. This study aimed to assess the neuroprotective effects of filgrastim in rotenone-induced rat model of PD and investigate the potential underlying mechanisms of filgrastim actions...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29287203/dj-1-preserving-mitochondrial-complex-i-activity-plays-a-critical-role-in-resveratrol-mediated-cardioprotection-against-hypoxia-reoxygenation-induced-oxidative-stress
#4
Yi Zhang, Xiao-Ran Li, Le Zhao, Guang-Ling Duan, Lin Xiao, He-Ping Chen
Resveratrol has been demonstrated to have cardioprotective effects by attenuating ischemia/reperfusion (I/R)-induced oxidative stress injury, but its in-depth molecular mechanisms against I/R-induced oxidative stress is not fully elaborated. DJ-1 plays a role in maintenance of mitochondrial complex I activity and is closely associated with oxidative stress. Therefore, this study sought to determine the contribution of DJ-1-mediated maintenance of mitochondrial complex I activity to the anti-oxidative stress effect of Resveratrol in the H9c2 cardiomyocytes subjected to hypoxia/reoxygenation (H/R)...
December 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29259888/larvicidal-activity-and-in-vitro-regulation-of-rotenoids-from-cassia-tora-l
#5
Sharad Vats
The search for new insecticidal natural products is very important viewing the global incidence of malaria. In the present study, rotenoids viz., sumatrol, rotenone, tephrosin, rotenol, deguelin, and elliptone were identified from the plant parts and callus culture of Cassia tora L. Maximum content of rotenoids was observed in roots (1.96% ± 0.03) and minimum in the stem (0.52% ± 0.02). Rotenoid showed larvicidal activity against Anopheles stephensi larvae (LC50-120.61 ppm; P < 0.05). To enhance the production of rotenoids in vitro, the callus culture of C...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29251620/-effect-of-afobazole-and-levodopa-on-the-activity-of-proline-specific-proteinases-and-adenosine-deaminase-in-blood-serum-and-brain-structures-of-rats-with-experimental-parkinson-s-syndrome-induced-by-systemic-administration-of-rotenone
#6
E A Ivanova, N N Zolotov, I G Kapitsa, V F Pozdnev, E A Valdman, T A Voronina
Rats with experimental Parkinson's syndrome induced by seven-day intraperitoneal administration of rotenone at a dose of 2.75 mg/kg have an increased activity of prolylendopeptidase (EC 3.4.21.26, PREP) in blood serum and a decreased activity of adenosine deaminase (EC 3.5.4.4, ADA) in serum and in the prefrontal cortex. PREP and ADA activity in other brain structures (in the striatum, hypothalamus and hippocampus) did not change; dipeptidyl peptidase IV activity (EC 3.4.14.5, DPP-4, CD26) also remained constant in serum and in all the brain structures investigated...
November 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/29242353/cardiac-specific-bdh1-overexpression-ameliorates-oxidative-stress-and-cardiac-remodeling-in-pressure-overload-induced-heart-failure
#7
Motoki Uchihashi, Atsushi Hoshino, Yoshifumi Okawa, Makoto Ariyoshi, Satoshi Kaimoto, Shuhei Tateishi, Kazunori Ono, Ryoetsu Yamanaka, Daichi Hato, Yohei Fushimura, Sakiko Honda, Kuniyoshi Fukai, Yusuke Higuchi, Takehiro Ogata, Eri Iwai-Kanai, Satoaki Matoba
BACKGROUND: Energy starvation and the shift of energy substrate from fatty acids to glucose is the hallmark of metabolic remodeling during heart failure progression. However, ketone body metabolism in the failing heart has not been fully investigated. METHODS AND RESULTS: Microarray data analysis and mitochondrial isobaric tags for relative and absolute quantification proteomics revealed that the expression of D-β-hydroxybutyrate dehydrogenase I (Bdh1), an enzyme that catalyzes the NAD+/NADH coupled interconversion of acetoacetate and β-hydroxybutyrate, was increased 2...
December 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/29222327/mitochondrially-produced-atp-affects-stem-cell-pluripotency-via-actl6a-mediated-histone-acetylation
#8
Ying Zhang, Peng Cui, Yuhuan Li, Guihai Feng, Man Tong, Lu Guo, Tianda Li, Lei Liu, Wei Li, Qi Zhou
ATP is mainly generated by glycolysis in pluripotent stem cells (PSCs) and is consumed to maintain cell viability. Differences in mitochondrial activity among induced (i)PSCs with different degrees of pluripotency are poorly understood. In this study, by comparing gene expression and mitochondrial activity among iPSCs with different degrees of pluripotency, we found that mitochondrial complex I gene expression, complex I activity, and cellular ATP levels were much higher in fully pluripotent stem cell lines than in partially pluripotent stem cell lines...
December 8, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29217997/neurochemical-and-behavior-deficits-in-rats-with-iron-and-rotenone-co-treatment-role-of-redox-imbalance-and-neuroprotection-by-biochanin-a
#9
Lijia Yu, Xijin Wang, Hanqing Chen, Zhiqiang Yan, Meihua Wang, Yunhong Li
Increasing evidences show that the etiology of Parkinson's disease (PD) is multifactorial. Studying the combined effect of several factors is becoming a hot topic in PD research. On one hand, iron is one of the essential trace metals for human body; on the other hand, iron may be involved in the etiopathogenesis of PD. In our present study, the rats with increased neonatal iron (120 μg/g bodyweight) supplementation were treated with rotenone (0.5 mg/kg) when they were aged to 14 weeks. We observed that iron and rotenone co-treatment induced significant behavior deficits (time-dependent) and striatal dopamine depletion in the male and female rats, while they did not do so when they were used alone...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29211056/krebs-cycle-metabolites-and-preferential-succinate-oxidation-following-neonatal-hypoxic-ischemic-brain-injury-in-mice
#10
Prateek V Sahni, Jimmy Zhang, Sergey Sosunov, Alexander Galkin, Zoya Niatsetskaya, Anatoly Starkov, Paul S Brookes, Vadim S Ten
BackgroundReverse electron transport (RET) driven by the oxidation of succinate has been proposed as the mechanism of accelerated production of reactive oxygen species (ROS) in post-ischemic mitochondria. However, it remains unclear whether upon reperfusion, mitochondria preferentially oxidase succinate.MethodsNeonatal mice were subjected to Rice-Vannucci model of hypoxic-ischemic brain injury (HI) followed by assessment of Krebs cycle metabolites, mitochondrial substrate preference, and H2O2 generation rate in the ischemic brain...
December 6, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29209997/-18f-bms-747158-02pet-imaging-for-evaluating-hepatic-mitochondrial-complex-1dysfunction-in-a-mouse-model-of-non-alcoholic-fatty-liver-disease
#11
Takemi Rokugawa, Sotaro Momosaki, Miwa Ito, Hitoshi Iimori, Yuki Kato, Kohji Abe
BACKGROUND: Mitochondrial dysfunction is one of the main causes of non-alcohol fatty liver disease (NAFLD). [18F]-BMS-747158-02 (18F-BMS) which was originally developed as a myocardial perfusion imaging agent was reported to bind mitochondrial complex-1 (MC-1). The aim of this study was to investigate the potential use of 18F-BMS for evaluating hepatic MC-1 activity in mice fed a methionine- and choline-deficient (MCD) diet. Male C57BL/6J mice were fed a MCD diet for up to 2 weeks. PET scans with 18F-BMS were performed after 1 and 2 weeks of the MCD diet...
December 6, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/29196105/asiatic-acid-ameliorates-hepatic-ischemia-reperfusion-injury-in-rats-via-mitochondria-targeted-protective-mechanism
#12
Yapeng Lu, Huiwen Kan, Ying Wang, Dan Wang, Xueting Wang, Jing Gao, Li Zhu
It has been proved that asiatic acid (AA) directly targets mitochondria and acts as a mild mitochondrial uncoupler. In this study, we aim to investigate the protective effects of AA against ischemia/reperfusion (I/R)-induced liver injury in rats and some underlying mechanisms involved were elucidated. The results showed that 50mg/kg AA pre-treatment significantly reduced I/R-induced liver damage, characterized by the decreased release of aspartate aminotransferase (AST) and TNF-α. Furthermore, AA pre-treatment dramatically inhibited the production of MDA and increased the hepatic SOD, catalase activities and GSH levels in liver tissue of I/R rats which indicated that AA ameliorated I/R-induced liver damage by reducing oxidative stress...
November 28, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29196028/serum-response-factor-promotes-dopaminergic-neuron-survival-via-activation-of-beclin-1-dependent-autophagy
#13
Xiao-Yu Cheng, Si-Yue Li, Cheng-Jie Mao, Mei-Xia Wang, Jing Chen, Fen Wang, Guang-Hui Wang, Wen-Bin Deng, Xiao-Kang Li, Chun-Feng Liu
Serum response factor (SRF), a transcription factor highly expressed in neurons, is involved in neuronal survival and the pathogenesis of some neurodegenerative disorders. The ablation of SRF renders the midbrain dopaminergic (DA) neurons vulnerable to 1-methyl 4-phenyl 1,2,3,6-tetrahydropyridine-induced neurotoxicity, however, the underlying mechanisms remain poorly understood. Here, we report decreased SRF levels in the substantia nigra (SN) of rotenone-treated rats that was associated with the loss of tyrosine hydroxylase (TH)-positive neurons...
November 28, 2017: Neuroscience
https://www.readbyqxmd.com/read/29189956/changes-of-mitochondrial-respiratory-function-during-odontogenic-differentiation-of-rat-dental-papilla-cells
#14
Fuping Zhang, Liulin Jiang, Yifan He, Wenguo Fan, Xiaoyan Guan, Qianyi Deng, Fang Huang, Hongwen He
Dental papilla cells (DPCs) belong to precursor cells differentiating to odontoblasts and play an important role in dentin formation and reproduction. This study aimed to explore the changes and and involvement of mitochondrial respiratory function during odontogenic differentiation. Primary DPCs were obtained from first molar dental papilla of neonatal rats and cultured in odontogenic medium for 7, 14, 21 days. DPCs, which expressed mesenchymal surface markers CD29, CD44 and CD90, had the capacity for self-renewal and multipotent differentiation...
November 30, 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/29183837/melatonin-inhibits-rotenone-induced-sh-sy5y-cell-death-via-the-downregulation-of-dynamin-related-protein-1-expression
#15
Hongyan Zhou, Tuckyun Cheang, Fengjuan Su, Yifan Zheng, Shaozhen Chen, Jiezhen Feng, Pei Zhong, Ling Chen
Previous studies have shown that melatonin can protect cells against rotenone-induced cell death. Yet, the mechanism involved in this protection requires further research. In this study, we aimed to further investigate the effects of melatonin on inhibiting rotenone-induced SH-SY5Y cells and the underlying molecular mechanisms. Human neuroblastoma SH-SY5Y cells were treated with 0.3 or 1μM rotenone for 6 or 12h. Cell viability was measured with an MTS assay, the mitochondrial membrane potential was determined with a Rhodamine 123 staining assay, and the protein expression levels of the markers of autophagy, including cytochrome C release (Cyt C), light chain 3B (LC3 B) and Dynamin-Related Protein 1 (Drp1) were analyzed by western blotting...
November 25, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29181664/immunomorphological-changes-in-the-olfactory-bulbs-of-rats-after-intranasal-administration-of-rotenone
#16
D N Voronkov, K A Kutukova, M V Ivanov, R M Khudoerkov
Changes in the structure of the olfactory bulbs after long-term intranasal administration of pesticide rotenone, a classical inductor of parkinsonism, to rats were studied by the methods of immunomorphology. In rats intranasally receiving rotenone in a dose of 2.5 mg/kg every other day over 2 weeks, a decrease in the density of dopaminergic neurons and the area of astrocyte processes in the olfactory bulbs, activation of microglia in the glomerular layer, and enhanced α-synuclein phosphorylation and its accumulation in the bodies of mitral layer neurons were observed...
November 27, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29174113/ghrelin-protects-retinal-ganglion-cells-against-rotenone-via-inhibiting-apoptosis-restoring-mitochondrial-function-and-activating-akt-mtor-signaling
#17
Shenwen Liu, Sheng Chen, Jing Ren, Baijun Li, Bo Qin
Ghrelin, a 28-amino acid peptide hormone, has protective effects on neuronal cells. The present study aimed to examine the neuroprotective effects of ghrelin on the rat retinal ganglion cells in the rotenone-induced in vitro model of Parkinson's disease (PD). Cell viability and cell apoptosis were determined by MTT assay and flow cytometry, respectively. Mitochondrial functions were detected by mitochondrial complex I activity assay and mitochondrial membrane potential (MMP) assay. The mRNA and protein expression levels were determined by qRT-PCR and western blot, respectively...
November 21, 2017: Neuropeptides
https://www.readbyqxmd.com/read/29170640/shedding-of-microvesicles-from-microglia-contributes-to-the-effects-induced-by-metabotropic-glutamate-receptor-5-activation-on-neuronal-death
#18
Martina Beneventano, Simona F Spampinato, Sara Merlo, Mariangela Chisari, Paola Platania, Marco Ragusa, Michele Purrello, Ferdinando Nicoletti, Maria Angela Sortino
Metabotropic glutamate (mGlu) receptor 5 is involved in neuroinflammation and has been shown to mediate reduced inflammation and neurotoxicity and to modify microglia polarization. On the other hand, blockade of mGlu5 receptor results in inhibition of microglia activation. To dissect this controversy, we investigated whether microvesicles (MVs) released from microglia BV2 cells could contribute to the communication between microglia and neurons and whether this interaction was modulated by mGlu5 receptor. Activation of purinergic ionotropic P2X7 receptor with the stable ATP analog benzoyl-ATP (100 μM) caused rapid MVs shedding from BV2 cells...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29169114/evaluation-of-antiparkinson-activity-of-ptupb-by-measuring-dopamine-and-its-metabolites-in-drosophila-melanogaster-lc-ms-ms-method-development
#19
Navya Lakkappa, Praveen T Krishnamurthy, Karthik Yamjala, Sung Hee Hwang, Bruce D Hammock, B Babu
Soluble epoxide hydrolase (sEH) inhibition is reported to elevate endogenous epoxyeicosatrienoic acids (EET's), which are known to play an important role in neuroprotection by inhibiting oxidative stress and neuroinflammation. In the present study, PTUPB, a dual inhibitor of sEH and COX-2, has been tested for its antiparkinson activity against rotenone (ROT) induced neurodegeneration in Drosophila model of Parkinson's disease (PD). To determine the efficacy and brain bioavailability of PTUPB a simple, rapid and sensitive LC-MS/MS method was developed and validated for the estimation of PTUPB (Method-I), dopamine (DA) and its metabolites (Method-II) in fly head...
November 16, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29168786/effects-of-commonly-used-pesticides-in-china-on-the-mitochondria-and-ubiquitin-proteasome-system-in-parkinson-s-disease
#20
Tingting Chen, Jieqiong Tan, Zhengqing Wan, Yongyi Zou, Henok Kessete Afewerky, Zhuohua Zhang, Tongmei Zhang
Evidence continues to accumulate that pesticides are the leading candidates of environmental toxins that may contribute to the pathogenesis of Parkinson's disease. The mechanisms, however, remain largely unclear. According to epidemiological studies, we selected nine representative pesticides (paraquat, rotenone, chlorpyrifos, pendimethalin, endosulfan, fenpyroximate, tebufenpyrad, trichlorphon and carbaryl) which are commonly used in China and detected the effects of the pesticides on mitochondria and ubiquitin-proteasome system (UPS) function...
November 23, 2017: International Journal of Molecular Sciences
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