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https://www.readbyqxmd.com/read/29148797/nigegladines-a-c-three-thymoquinone-dimers-from-nigella-glandulifera
#1
Jie Tian, Chao Han, Wen-Hua Guo, Yong Yin, Xiao-Bing Wang, Hong-Bin Sun, He-Quan Yao, Yong Yang, Chen Wang, Chang Liu, Ming-Hua Yang, Ling-Yi Kong
Nigegladines A-C (1-3), three thymoquinone dimers, were isolated from the seeds of Nigella glandulifera. Racemic 1 possesses a unique tricyclo[5.4.0.1(2,6)]dodecane carbon skeleton, and compounds 2 and 3 are two unusual diterpenoid alkaloids with indole cores. Their structures were determined by extensive spectroscopic analyses, and that of 1 was confirmed by single-crystal X-ray diffraction. Both (+)-1 and (-)-1 exhibited significant protective effects against hypoxia/reoxygenation-induced H9c2 myocardial cell injury...
November 17, 2017: Organic Letters
https://www.readbyqxmd.com/read/29146241/cardiac-progenitor-cells-activated-by-mitochondrial-delivery-of-resveratrol-enhance-the-survival-of-a-doxorubicin-induced-cardiomyopathy-mouse-model-via-the-mitochondrial-activation-of-a-damaged-myocardium
#2
Jiro Abe, Yuma Yamada, Takeda Atsuhito, Hideyoshi Harashima
It has been reported that transplanting native cells would lack efficiency without producing artificial cell-tissue, due to the exaggerated oxidative stress in doxorubicin-induced cardiomyopathy. We attempted to activate cardiac progenitor cells (CPCs) by delivering resveratrol to mitochondria using a mitochondrial drug delivery system (MITO-Porter system). We first evaluated the viability of H9c2 cells (a cardio myoblast cell line) after doxorubicin treatment, where H9c2 cells were co-cultured with or without the mitochondria activated CPCs (referred to herein as MITO cell)...
November 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29142252/gallic-acid-reduces-blood-pressure-and-attenuates-oxidative-stress-and-cardiac-hypertrophy-in-spontaneously-hypertensive-rats
#3
Li Jin, Zhe Hao Piao, Simei Sun, Bin Liu, Gwi Ran Kim, Young Mi Seok, Ming Quan Lin, Yuhee Ryu, Sin Young Choi, Hae Jin Kee, Myung Ho Jeong
Gallic acid (GA) has been reported to have beneficial effects on cancer, vascular calcification, and diabetes-induced myocardial dysfunction. We hypothesized that GA controls hypertension via oxidative stress response regulation in an animal model for essential hypertension. Spontaneously hypertensive rats (SHRs) were administered GA for 16 weeks. GA treatment lowered elevated systolic blood pressure in SHRs through the inhibition of vascular contractility and components of the renin-angiotensin II system. In addition, GA administration reduced aortic wall thickness and body weight in SHRs...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29139225/oolong-tea-prevents-cardiomyocyte-loss-against-hypoxia-by-attenuating-p-jnk-mediated-hypertrophy-and-enhancing-p-igf1r-p-akt-and-p-bad-ser136-activity-and-by-fortifying-nrf2-antioxidation-system
#4
Marthandam Asokan Shibu, Chia-Hua Kuo, Bih-Cheng Chen, Da-Tong Ju, Ray-Jade Chen, Chao-Hung Lai, Pei-Jane Huang, Vijaya Padma Viswanadha, Wei-Wen Kuo, Chih-Yang Huang
Tea, the most widely consumed natural beverage has been associated with reduced mortality risk from cardiovascular disease. Oolong tea is a partially fermented tea containing high levels of catechins, their degree of oxidation varies between 20%-80% causing differences in their active metabolites. In this study we examined the effect of oolong tea extract (OTE) obtained by oxidation at low-temperature for short-time against hypoxic injury and found that oolong tea provides cyto-protective effects by suppressing the JNK mediated hypertrophic effects and by enhancing the innate antioxidant mechanisms in neonatal cardiomyocytes and in H9c2 cells...
November 15, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/29137484/the-role-of-endogenous-reactive-oxygen-species-in-cardiac-myocyte-autophagy
#5
J-P Wang, R-F Chi, J Liu, Y-Z Deng, X-B Han, F-Z Qin, B Li
Autophagy is implicated in the maintenance of cardiac homeostasis. Autophagy is activated in heart failure, in which reactive oxygen species (ROS) are increased. Exogenous ROS have been shown to induce cardiomyocyte autophagy alterations. However, little is known about the influences of physiological levels of endogenous ROS on cardiomyocyte autophagy. In the present study, we tested the hypothesis that endogenous ROS in cardiomyocytes play an important role in inducing autophagy. Cultured H9C2 cardiomyocytes or Sprague-Dawley rats were treated with the antioxidant N-acetyl-cysteine (NAC) or the superoxide dismutase mimic tempol under the basal or nutrient deprivation conditions...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29136764/cardiac-apoptosis-induced-under-high-glucose-condition-involves-activation-of-igf2r-signaling-in-h9c2-cardiomyoblasts-and-streptozotocin-induced-diabetic-rat-hearts
#6
Chih-Chung Feng, Sudhir Pandey, Ching-Yuang Lin, Chia-Yao Shen, Ruey-Lin Chang, Tung-Ti Chang, Ray-Jade Chen, Vijaya Padma Viswanadha, Yueh-Min Lin, Chih-Yang Huang
The insulin-like growth factor type 2 receptor (IGF2R) overexpression has been implicated in heart disease progression. Unregulated IGF2R signaling triggers cardiac hypertrophy, apoptosis, and cardiomyopathies. The present study investigated the role of IGF2R in cardiomyocyte apoptosis under high glucose (HG) levels and in streptozotocin (STZ) induced diabetic rat hearts. We found that IGF2 and IGF2R protein expression were highly upregulated under high glucose condition in H9c2 cells as well as in STZ induced diabetic rat hearts...
November 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29134085/gene-delivery-ability-of-polyethylenimine-and-polyethylene-glycol-dual-functionalized-nanographene-oxide-in-11-different-cell-lines
#7
Liping Wu, Jinshan Xie, Tan Li, Zihao Mai, Lu Wang, Xiaoping Wang, Tongsheng Chen
We recently developed a polyethylenimine (PEI) and polyethylene glycol (PEG) dual-functionalized reduced graphene oxide (GO) (PEG-nrGO-PEI, RGPP) for high-efficient gene delivery in HepG2 and Hela cell lines. To evaluate the feasibility and applicability of RGPP as a gene delivery carrier, we here assessed the transfection efficiency of RGPP on gene plasmids and siRNA in 11 different cell lines. Commercial polyalkyleneimine cation transfection reagent (TR) was used as comparison. In HepG2 cells, RGPP exhibited much stronger delivery ability for siRNA and large size plasmids than TR...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29130959/ginsenoside-rg1-protects-cardiomyocytes-against-hypoxia-reoxygenation-injury-via-activation-of-nrf2-ho-1-signaling-and-inhibition-of-jnk
#8
Qianhui Li, Yin Xiang, Yu Chen, Yong Tang, Yachen Zhang
BACKGROUND/AIMS: Excessive reactive oxygen species (ROS) disturb the physiology of H9c2 cells, which is regarded as a major cause of H9c2 cardiomyocyte apoptosis. Ginsenoside Rg1 is the main active extract of ginseng, which has important antioxidant properties in various cell models. This project investigated the role of ginsenoside Rg1 in hypoxia/reoxygenation (H/R)-induced oxidative stress injury in cultured H9c2 cells to reveal the underlying signaling pathways. METHODS: H9c2 cells were pretreated with ginsenoside Rg1 for 12 h before exposure to H/R...
November 3, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29130958/propofol-through-upregulating-caveolin-3-attenuates-post-hypoxic-mitochondrial-damage-and-cell-death-in-h9c2-cardiomyocytes-during-hyperglycemia
#9
Fan Deng, Shuang Wang, Liangqing Zhang, Xiang Xie, Shuyun Cai, Haobo Li, Gui-Ling Xie, Hui-Lai Miao, Changmin Yang, Xin Liu, Zhengyuan Xia
BACKGROUND/AIMS: Hearts from diabetic subjects are susceptible to myocardial ischemia reperfusion (I/R) injury. Propofol has been shown to protect against myocardial I/R injury due to its antioxidant properties while the underlying mechanism remained incompletely understood. Thus, this study aimed to determine whether or not propofol could attenuate myocardial I/R injury by attenuating mitochondrial dysfunction/damage through upregulating Caveolin (Cav)-3 under hyperglycemia. METHODS: Cultured rat cardiomyocyte H9C2 cells were subjected to hypoxia/reoxygenation (H/R) in the absence or presence of propofol under high glucose (HG), and cell viability, lactate dehydrogenase (LDH) and mitochondrial viability as well as creatine kinase-MB (CK-MB), cardiac troponin I (cTnI) and intracellular adenosine triphosphate (ATP) content were measured with colorimetric Enzyme-Linked Immunosorbent Assays...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29130531/acute-hypoxic-preconditioning-prevents-palmitic-acid-induced-cardiomyocyte-apoptosis-via-switching-metabolic-glut4-glucose-pathway-back-to-cd36-fatty-acid-dependent
#10
Yeh-Peng Chen, Wei-Wen Kuo, Rathinasamy Baskaran, Cecilia-Hsuan Day, Ray-Jade Chen, Su-Ying Wen, Tsung-Jung Ho, Viswanadha Vijaya Padma, Chia-Hua Kuo, Chih-Yang Huang
Metabolic syndrome is a risk factor for the development of cardiovascular diseases. Myocardial cell damage leads to an imbalance of energy metabolism, and many studies have indicated that short-term hypoxia during myocardial cell injury has a protective effect. In our previous animal studies, we found that short-term hypoxia in the heart has a protective effect, but long-term hypoxia increases myocardial cell injury. Palmitic acid (PA)-treated H9c2 cardiomyoblasts and neonatal rat ventricle cardiomyocytes were used to simulate hyperlipidemia model, which suppress cluster of differentiation 36 (CD36) and activate glucose transporter type 4 (GLUT4)...
November 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29129703/identification-of-novel-mitochondrial-localization-signals-in-human-tafazzin-the-cause-of-the-inherited-cardiomyopathic-disorder-barth-syndrome
#11
Ana A Dinca, Wei-Ming Chien, Michael T Chin
Mutations in the gene tafazzin (TAZ) result in Barth syndrome (BTHS). Patients present with hypotonia, cyclic neutropenia, 3-methyglutaconic aciduria, and cardiomyopathy, which is the major cause of mortality. The recessive, X-linked TAZ gene encodes a mitochondrial membrane-associated phospholipid modifying enzyme, which adds unsaturated fatty acid species to monolysocardiolipin to generate mature cardiolipin in the mitochondrial membrane that is essential for mitochondrial morphology and function. To identify intrinsic mitochondrial localization sequences in the human TAZ protein, we made sequential TAZ peptide-eGFP fusion protein expression constructs and analyzed the localization of eGFP fluorescence by confocal microscopy...
November 10, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29129702/fkbp8-protects-the-heart-from-hemodynamic-stress-by-preventing-the-accumulation-of-misfolded-proteins-and-endoplasmic-reticulum-associated-apoptosis-in-mice
#12
Tomofumi Misaka, Tomokazu Murakawa, Kazuhiko Nishida, Yosuke Omori, Manabu Taneike, Shigemiki Omiya, Chris Molenaar, Yoshihiro Uno, Osamu Yamaguchi, Junji Takeda, Ajay M Shah, Kinya Otsu
Protein quality control in cardiomyocytes is crucial to maintain cellular homeostasis. The accumulation of damaged organelles, such as mitochondria and misfolded proteins in the heart is associated with heart failure. During the process to identify novel mitochondria-specific autophagy (mitophagy) receptors, we found FK506-binding protein 8 (FKBP8), also known as FKBP38, shares similar structural characteristics with a yeast mitophagy receptor, autophagy-related 32 protein. However, knockdown of FKBP8 had no effect on mitophagy in HEK293 cells or H9c2 myocytes...
November 9, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29129621/tdcpp-protects-cardiomyocytes-from-hypoxia-reoxygenation-injury-induced-apoptosis-through-mitigating-calcium-overload-and-promotion-gsk-3%C3%AE-phosphorylation
#13
Xiju He, Shoutian Li, Xiaoxia Fang, Yanhong Liao
TDCPP, Tris (1, 3-dichloro-2-propyl) phosphate belongs to a group of chemicals known as triester organophosphate flame retardants, It can alter calcium homeostasis at much lower concentrations in normal conditions, but the mechanism is unclear till now. Calcium overload is a leading cause of apoptosis in myocardial ischemia/reperfusion (I/R) injury, thus how to mitigate Ca(2+)-overload is deserved to be investigated. We therefore hypothesized that TDCPP could attenuate cardiomyocytes apoptosis in I/R injury...
November 9, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29128638/ulk1-regulated-autophagy-a-mechanism-in-cellular-protection-for-aldh2-against-hyperglycemia
#14
Min Liu, Songhe Lu, Wei He, Le Zhang, Ying Ma, Ping Lv, Meijuan Ma, Wenjun Yu, Jiaxing Wang, Mingming Zhang, Yingmei Zhang, Yan Li
Mitochondrial aldehyde dehydrogenase 2 (ALDH2), an important enzyme in the elimination of toxic aldehydes, is involved in cardioprotection against diabetes mellitus. This study was designed to examine the mechanism behind ALDH2-offered protection against high glucose exposure with a focus on autophagy. H9C2 cells were cultured with normal or high glucose medium in the presence or absence of the ALDH2 agonist Alda-1. GFP-LC3 puncta and immunofluorescence were employed to assess autophagosome formation. Western blotting was applied to evaluate autophagy protein markers Atg5, LC3, p62, ULK1 phosphorylation and ALDH2...
November 8, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29123378/10h-3-6-diazaphenothiazine-induces-g2-m-phase-cell-cycle-arrest-and-caspase-dependent-apoptosis-and-inhibits-cell-invasion-of-a2780-ovarian-carcinoma-cells-through-the-regulation-of-nf-%C3%AE%C2%BAb-and-birc6-xiap-complexes
#15
Jianxin Zhang, Chen Ming, Wenzhi Zhang, Patrick Nwabueze Okechukwu, Beata Morak-Młodawska, Krystian Pluta, Małgorzata Jeleń, Abdah Md Akim, Kok-Pian Ang, Kah Kooi Ooi
The asymptomatic properties and high treatment resistance of ovarian cancer result in poor treatment outcomes and high mortality rates. Although the fundamental chemotherapy provides promising anticancer activities, it is associated with severe side effects. The derivative of phenothiazine, namely, 10H-3,6-diazaphenothiazine (PTZ), was synthesized and reported with ideal anticancer effects in a previous paper. In this study, detailed anticancer properties of PTZ was examined on A2780 ovarian cancer cells by investigating the cytotoxicity profiles, mechanism of apoptosis, and cell invasion...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29115797/polyphenol-epigallocatechin-3-gallate-inhibits-hypoxia-reoxygenation-induced-h9c2-cell-apoptosis
#16
Wenlong Wang, Xiaohui Huang, Deliang Shen, Zonghua Ming, Mei Zheng, Jinying Zhang
BACKGROUND: We aimed to observe the protective effect of EGCG on hypoxia/reoxygenation injury of H9C2 myocardial cells and to study the inhibition mechanism of EGCG on hypoxia/reoxygenation injury of H9C2 myocardial cells. METHODS: H9C2 cells were used as the objects of study and hypoxia/reoxygenation cells were pretreated with EGCG in different concentrations. MTT, Hoechst 33258 and LDH were used to detect the viability and apoptosis of H9C2 cells. The protection mechanism of polyphenol epigallocatechin-3-gallate was studied via western blotting and mitochondrial membrane potential detection...
November 7, 2017: Minerva Medica
https://www.readbyqxmd.com/read/29115618/apelin%C3%A2-13-promotes-cell-proliferation-in-the-h9c2-cardiomyoblast-cell-line-by-triggering-extracellular-signal%C3%A2-regulated-kinase-1-2-and-protein-kinase-b-phosphorylation
#17
Luhua Yin, Pu Zhang, Chao Li, Jiafeng Si, Yongmei Wang, Xuemei Zhang, Deqing Zhang, Huanyi Zhang, Cong Lin
Apelin‑13 (APL‑13), a peptide hormone that serves as a ligand for G‑protein coupled receptors, has been demonstrated to be highly expressed in left ventricular hypertrophy rat models. It has been implicated in cardio‑protection under pathological states. The present study aimed to assess the physiological proliferation effect of APL‑13 in cultured H9c2 cardiomyoblast cells, and to elucidate the underlying mechanisms. Cell proliferation was determined by MTT assay. The extracellular signal‑regulated kinase (ERK) 1/2 and protein kinase B (Akt) signaling pathway was identified, and protein expression levels were detected using western blot analysis...
October 27, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115599/aconitine-induces-apoptosis-in-h9c2-cardiac-cells-via-mitochondria%C3%A2-mediated-pathway
#18
Xiangting Gao, Xincai Zhang, Jun Hu, Xuehua Xu, Yuanyi Zuo, Yun Wang, Jingfeng Ding, Hongfei Xu, Shaohua Zhu
Aconitine, a diterpenoid alkaloids derived from Aconitum plants, is widely employed to treat various diseases. The aim of the present study was to investigate the apoptotic effect of aconitine in H9c2 cardiac cells. H9c2 cell apoptosis induced by aconitine was detected by a Cell Counting kit‑8 assay, DAPI staining, Annexin V‑FITC/propidium iodide double staining and western blotting. The effects of aconitine on reactive oxygen species levels and mitochondrial membrane potential were confirmed by fluorescence microscopy and flow cytometry...
October 26, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115535/jujuboside-a-attenuates-norepinephrine-induced-apoptosis-of-h9c2-cardiomyocytes-by-modulating-mapk-and-akt-signaling-pathways
#19
Chang-Rong Wan, Dan-Dan Han, Jian-Qin Xu, Peng Yin, Xiao-Long Xu, Chen Mei, Feng-Hua Liu, Zhao-Fei Xia
Cardiomyocyte apoptosis is closely associated with the pathogenesis of heart failure. Jujuboside A (JUA) is a type of saponin isolated from the seeds of Zizyphus jujuba. In traditional Chinese medicine, it is believed that JUA possesses multiple biological effects, including antianxiety, antioxidant and anti‑inflammatory activities. The present study aimed to evaluate the effects of JUA on norepinephrine (NE)‑induced apoptosis of H9c2 cells and to investigate its underlying mechanisms. Rat H9c2 cardiomyocytes were pretreated with JUA and were then exposed to NE as an in vitro model of myocardial apoptosis...
November 2, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115516/phosphorylation-of-signal-transducer-and-activator-of-transcription-3-induced-by-hyperglycemia-is-different-with-that-induced-by-lipopolysaccharide-or-erythropoietin-via-receptor%C3%A2-coupled-signaling-in-cardiac-cells
#20
Yu-Hsin Chiu, Po-Ming Ku, Yung-Ze Cheng, Yingxiao Li, Juei-Tang Cheng, Ho-Shan Niu
The signal transducer and activator of transcription 3 (STAT3) is known to be involved in hypertrophy and fibrosis in cardiac dysfunction. The activation of STAT3 via the phosphorylation of STAT3 is required for the production of functional activity. It has been established that lipopolysaccharide (LPS)‑induced phosphorylation of STAT3 in cardiomyocytes primarily occurs through a direct receptor‑mediated action. This effect is demonstrated to be produced rapidly. STAT3 in cardiac fibrosis of diabetes is induced by high glucose through promotion of the STAT3‑associated signaling pathway...
November 6, 2017: Molecular Medicine Reports
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