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Cardiomyocytes and extract

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https://www.readbyqxmd.com/read/30077999/to-be-or-not-to-be-the-smoker-s-paradox-an-in-vitro-study
#1
Franziska Wittmann, Adrian Türkcan, Ulrike Baranyi, Eva Eichmair, Günther Laufer, David Bernhard, Barbara Messner
BACKGROUND/AIMS: Clinical studies have reported a better outcome of smokers after myocardial infarction compared to non-smokers. The data are controversial, as some clinical studies did not observe this effect. The cell biological processes involved, which might account for a 'Smoker's Paradox', have not been investigated yet. Therefore, the aim was to elucidate the effect of cigarette smoke on the viability of cardiomyocytes in the context of hypoxia and reperfusion. METHODS: HL-1 cells were incubated with different concentrations of cigarette smoke extract (CSE) and subjected to hypoxia/reperfusion to further evaluate influence of CSE on viability of HL-1 cells using flow cytometry analyses, Western Blot and immunofluorescence staining...
August 3, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/30030530/astragaloside-iv-attenuates-myocardial-ischemia-reperfusion-injury-in-rats-via-inhibition-of-calcium-sensing-receptor-mediated-apoptotic-signaling-pathways
#2
Bo Yin, Xu-Wei Hou, Mei-Li Lu
Astragaloside IV (AsIV) is an active saponin extracted from Astragalus membranaceus, which has shown cardioprotective effects in a number of experimental animals. In this study we investigated the molecular mechanisms by which AsIV attenuated the myocardial ischemia reperfusion (MI/R)-induced injury in vitro and in vivo by focusing on calcium-sensing receptor (CaSR) and extracellular signal-regulated kinase 1/2 (ERK1/2). Rat neonatal cardiac myocytes were subjected to a hypoxia/reoxygenation (H/R) procedure in vitro, which significantly decreased the cell viability, increased lactate dehydrogenase (LDH) release, induced cardiomyocyte apoptosis, and increased [Ca2+ ]i ...
July 20, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/30029882/amniotic-membrane-extracted-proteins-protect-h9c2-cardiomyoblasts-against-hypoxia-induced-apoptosis-by-modulating-oxidative-stress
#3
Yousef Faridvand, Samira Nozari, Simin Atashkhoei, Mohammad Nouri, Ahmadreza Jodati
Protection of the cardiac cell against hypoxia-induced cell damage is one of the main approaches to preventing cardiovascular disease. Earlier studies have shown the cardioprotective effect of the human Amniotic Membrane (hAM) in animal model of cardiac injury. However, the effect of Amniotic Membrane Proteins (AMPs), extracted from hAM, on myocardial hypoxia injury remains unclear. So, our study aimed to investigate the protective effect of AMPs against hypoxia-induced cardiomyocytes apoptosis. H9c2 cardiomyocytes were pre-treated with AMPs followed by 24 h in hypoxia condition...
July 17, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/30027630/automated-quantitative-analysis-of-multiple-cardiomyocytes-at-the-single-cell-level-with-three-dimensional-holographic-imaging-informatics
#4
Inkyu Moon, Keyvan Jaferzadeh, Ezat Ahmadzadeh, Bahram Javidi
Cardiomyocytes derived from human pluripotent stem cells are a promising tool for disease modelling, drug compound testing, and cardiac toxicity screening. Bio-image segmentation is a prerequisite step in cardiomyocyte image analysis by digital holography (DH) in microscopic configuration and has provided satisfactory results. In this study, we quantified multiple cardiac cells from segmented three-dimensional DH images at the single-cell level and measured multiple parameters describing the beating profile of each individual cell...
July 20, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/30008784/effect-of-aqueous-extract-from-descurainia-sophia-l-webb-ex-prantl-on-ventricular-remodeling-in-chronic-heart-failure-rats
#5
Ying Luo, Zhiqiang Sun, Pengfei Hu, Yuanhong Wu, Weiwei Yu, Shuwei Huang
Objective: Descurainia sophia (L.) Webb ex Prantl (DS) is a traditional Chinese medicine. Our current study was to evaluate the effect of DS on ventricular remodeling in chronic heart failure (HF) rats and its underlying mechanism. Methods: The rat chronic heart failure model induced by suprarenal abdominal aortic coarctation surgery. The survival rats were randomly divided into 3 groups: the sham group (n=6), the HF group (n=6), and the HF+DS group (n=6). After 3 months of drug intervention, we examined the effects of DS by Sirius Red staining, electron microscopy, echocardiography, hemodynamic measurement, and TUNEL and explored the underlying mechanism by Western blotting...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29991602/solute-movement-in-the-t-tubule-system-of-rabbit-and-mouse-cardiomyocytes
#6
Cherrie H T Kong, Eva A Rog-Zielinska, Peter Kohl, Clive H Orchard, Mark B Cannell
Cardiac transverse (t-) tubules carry both electrical excitation and solutes toward the cell center but their ability to transport small molecules is unclear. While fluorescence recovery after photobleaching (FRAP) can provide an approach to measure local solute movement, extraction of diffusion coefficients is confounded by cell and illumination beam geometries. In this study, we use measured cellular geometry and detailed computer modeling to derive the apparent diffusion coefficient of a 1-kDa solute inside the t-tubular system of rabbit and mouse ventricular cardiomyocytes...
July 24, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29987809/isolation-of-atrial-and-ventricular-cardiomyocytes-for-in-vitro-studies
#7
Jelena Plačkić, Jens Kockskämper
High quality cardiomyocyte isolation is of critical importance for successful studies of myocardial function at the cellular and molecular level. Although previous work has established isolation procedures for various species, it still remains challenging to produce consistently a high yield of viable and healthy cardiomyocytes. The basis for the most successful and reproducible isolation of cardiomyocytes from intact hearts is the Langendorff retrograde perfusion technique. Here, we will illustrate in detail all practical aspects of the enzyme-based Langendorff isolation of rat atrial and ventricular cardiomyocytes...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29986596/dendropanax-morbifera-prevents-cardiomyocyte-hypertrophy-by-inhibiting-the-sp1-gata4-pathway
#8
Simei Sun, Tianyi Li, Li Jin, Zhe Hao Piao, Bin Liu, Yuhee Ryu, Sin Young Choi, Gwi Ran Kim, Ji Eun Jeong, An Jin Wi, Song Ju Lee, Hae Jin Kee, Myung Ho Jeong
An extract of Dendropanax morbifera branch exerts antioxidant, anti-inflammatory, antithrombotic, and anticancer activities. The purpose of this study was to investigate the effect of the extract in isoproterenol-induced cardiac hypertrophy. Phalloidin staining showed that treatment with the extract dramatically prevents isoproterenol-induced H9c2 cell enlargement and the expression of cardiac hypertrophic marker genes, including atrial natriuretic peptide (ANP) and B-type brain natriuretic peptide (BNP). Further, pretreatment with the extract decreased isoproterenol-induced GATA4 and Sp1 expression in H9c2 cells...
July 9, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29962955/-panax-ginseng-polysaccharide-protected-h9c2-cardiomyocyte-from-hypoxia-reoxygenation-injury-through-regulating-mitochondrial-metabolism-and-risk-pathway
#9
Yi-Han Zuo, Quan-Bin Han, Geng-Ting Dong, Rui-Qi Yue, Xue-Cong Ren, Jian-Xin Liu, Liang Liu, Pei Luo, Hua Zhou
Background and Objective: Ischemic heart disease (IHD) has been the major issue of public health. Panax ginseng (ginseng) has been verified as an effective traditional Chinese medicines and exerted cardioprotective effect. This study aimed to investigate the polysaccharide fraction of ginseng on hypoxia/reoxygenation (H/R) injury in cardiomyocytes and the underlying mechanisms. Methods: Ginseng was extracted by ethanol and fractionated by high-speed counter current chromatography (HSCCC) and column separation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29913456/long-term-oral-administration-of-theaphenon-e-improves-cardiomyocyte-mechanics-and-calcium-dynamics-by-affecting-phospholamban-phosphorylation-and-atp-production
#10
Leonardo Bocchi, Monia Savi, Valeria Naponelli, Rocchina Vilella, Gianluca Sgarbi, Alessandra Baracca, Giancarlo Solaini, Saverio Bettuzzi, Federica Rizzi, Donatella Stilli
BACKGROUND/AIMS: Dietary polyphenols from green tea have been shown to possess cardio-protective activities in different experimental models of heart diseases and age-related ventricular dysfunction. The present study was aimed at evaluating whether long term in vivo administration of green tea extracts (GTE), can exert positive effects on the normal heart, with focus on the underlying mechanisms. METHODS: The study population consisted of 20 male adult Wistar rats...
June 15, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29880742/a-crude-1-dnj-extract-from-home-made-bombyx-batryticatus-inhibits-diabetic-cardiomyopathy-associated-fibrosis-in-db-db-mice-and-reduces-protein-n-glycosylation-levels
#11
Qing Zhao, Tian Zhu Jia, Qi Chen Cao, Fang Tian, Wan Tao Ying
The traditional Chinese drug Bombyx Batryticatus (BB), which is also named the white stiff silkworm, has been widely used in Chinese clinics for thousands of years. It is famous for its antispasmodic and blood circulation-promoting effects. Cardiomyocyte hypertrophy, interstitial cell hyperplasia, and myocardial fibrosis are closely related to the N -glycosylation of key proteins. To examine the alterations of N -glycosylation that occur in diabetic myocardium during the early stage of the disease, and to clarify the therapeutic effect of 1-Deoxynojirimycin (1-DNJ) extracted from BB, we used the db/db (diabetic) mouse model and an approach based on hydrophilic chromatography solid-phase extraction integrated with an liquid Chromatograph Mass Spectrometer (LC-MS) identification strategy to perform a site-specific N -glycosylation analysis of left ventricular cardiomyocyte proteins...
June 7, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29865255/a-novel-atypical-pkc-iota-inhibitor-echinochrome-a-enhances-cardiomyocyte-differentiation-from-mouse-embryonic-stem-cells
#12
Hyoung Kyu Kim, Sung Woo Cho, Hye Jin Heo, Seung Hun Jeong, Min Kim, Kyung Soo Ko, Byoung Doo Rhee, Natalia P Mishchenko, Elena A Vasileva, Sergey A Fedoreyev, Valentin A Stonik, Jin Han
Echinochrome A (EchA) is a marine bioproduct extracted from sea urchins having antioxidant, antimicrobial, anti-inflammatory, and chelating effects, and is the active component of the clinical drug histochrome. We investigated the potential use of Ech A for inducing cardiomyocyte differentiation from mouse embryonic stem cells (mESCs). We also assessed the effects of Ech A on mitochondrial mass, inner membrane potential (Δψm), reactive oxygen species generation, and levels of Ca2+ . To identify the direct target of Ech A, we performed in vitro kinase activity and surface plasmon resonance binding assays...
June 2, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29852387/microrna-497-promotes-proliferation-and-inhibits-apoptosis-of-cardiomyocytes-through-the-downregulation-of-mfn2-in-a-mouse-model-of-myocardial-ischemia-reperfusion-injury
#13
Lei Qin, Wen Yang, Yao-Xin Wang, Zhen-Jun Wang, Chen-Chen Li, Man Li, Jie-Yun Liu
INTRODUCTION: Myocardial ischemia-reperfusion (I/R) injury affects millions of people worldwide and has a very high mortality rate. Since microRNA-497 (miR-497) has been found to be related with cardiomyocyte apoptosis, this study aimed to explore the effect of miR-497 by targeting Mfn2 in a mouse model of myocardial ischemia-reperfusion (I/R) injury. MATERIALS: BALB/c mice were modeled with I/R and some were injected with miR-497 agomir before I/R to observe whether miR-497 alleviates the injury that occurs as a result of I/R...
September 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29845489/cardiomyocyte-lethality-by-multidirectional-stimuli
#14
José Américo Nabuco Leva Ferreira de Freitas, Fernanda Dos Santos Costa Leomil, Marcelo Zoccoler, Priscila Correia Antoneli, Pedro Xavier de Oliveira
Multidirectional defibrillation protocols have shown better efficiency than monodirectional; still, no testing was performed to assess cell lethality. We investigated lethality of multidirectional defibrillator-like shocks on isolated cardiomyocytes. Cells were isolated from adult male Wistar rats and plated into a perfusion chamber. Electrical field stimulation threshold (ET ) was obtained, and cells were paced with suprathreshold bipolar electrical field (E) pulses. Either one monodirectional high-intensity electrical field (HEF) pulse aligned at 0° (group Mono0) or 60° (group Mono60) to cell major axis or a multidirectional sequence of three HEF pulses aligned at 0°, 60°, and 120° each was applied...
May 30, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29799462/the-extracts-and-major-compounds-derived-from-astragali-radix-alter-mitochondrial-bioenergetics-in-cultured-cardiomyocytes-comparison-of-various-polar-solvents-and-compounds
#15
Yun Huang, Kenneth Kin Leung Kwan, Ka Wing Leung, Huaiyou Wang, Xiang Peng Kong, Tina Ting Xia Dong, Karl Wah Keung Tsim
Astragali Radix (AR) is a widely used "Qi-invigorating" herb in China for its tonic effects in strengthening biological tissues. The extract of AR contains abundant antioxidants, including astragalosides and isoflavonoids. However, very few reports have systematically measured the effects of the major components of AR on cell mitochondrial bioenergetics. Here, a systemic approach employing an extracellular flux analyzer was developed to evaluate mitochondrial respiration in cultured cardiomyocyte cells H9C2...
May 25, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29746994/shenfu-formula-reduces-cardiomyocyte-apoptosis-in-heart-failure-rats-by-regulating-micrornas
#16
Xu Yan, Hongjin Wu, Jianxun Ren, Yuna Liu, Shengqi Wang, Jiyuan Yang, Shuyan Qin, Delin Wu
ETHNOPHARMACOLOGICAL RELEVANCE: Shenfu decoction consists of the water extract from the dried root or rootstalk of Panax ginseng C. A. Mey (Asian ginseng) and the lateral root of Aconitum carmichaeli Debx (Fuzi, Heishunpian in Chinese). Shenfu Formula has been used as a folk Chinese medicine for thousands of years. Recent studies have shown that Shenfu injection can enhance cardiac function and regulate arrhythmia. AIM OF THE STUDY: Shenfu Formula plays an important role in the treatment of heart failure...
May 7, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29734386/renal-papillary-tip-extract-stimulates-bnp-production-and-excretion-from-cardiomyocytes
#17
Itaru Goto, Ryuji Okamoto, Ryotaro Hashizume, Noboru Suzuki, Rie Ito, Keiichi Yamanaka, Hiromitsu Saito, Hiroshi Kiyonari, Isao Tawara, Yuki Kageyama, Yoshito Ogihara, Yusuf Ali, Norikazu Yamada, Naoyuki Katayama, Masaaki Ito
BACKGROUND: Brain natriuretic peptide (BNP) is an important biomarker for patients with cardiovascular diseases, including heart failure, hypertension and cardiac hypertrophy. It is also known that BNP levels are relatively higher in patients with chronic kidney disease and no heart disease; however, the mechanism remains unclear. METHODS AND RESULTS: We developed a BNP reporter mouse and occasionally found that this promoter was activated specifically in the papillary tip of the kidneys, and its activation was not accompanied by BNP mRNA expression...
2018: PloS One
https://www.readbyqxmd.com/read/29729707/swainsonine-induces-apoptosis-of-rat-cardiomyocytes-via-mitochondria%C3%A2-mediated-pathway
#18
Xiang Zheng, Shushu Wang, Dakai Chen, Xiaoming Yang
Swainsonine is an Astragalus membranaceus extract. It is indole, alkaloid, and soluble in water. Its effect on rat cardiomyocytes apoptosis, and the mechanisms underlying that effect, were investigated by inducing apoptosis in H9c2 cells. This was detected by MTT assay, Annexin V-FITC/propidium iodide double staining and western blotting. Flow cytometry and fluorescence microscopy were used to confirm swainsonine's effect on mitochondrial membrane potential and levels of reactive oxygen species, while an ATP-dependent bioluminescence assay kit served to find the ATP contents...
April 30, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29726706/-i-hibiscus-sabdariffa-i-roselle-polyphenol-rich-extract-averts-cardiac-functional-and-structural-abnormalities-in-type-1-diabetic-rats
#19
Nur Liyana Mohammed Yusof, Satirah Zainalabidin, Norsyahida Mohd Fauzi, Siti Balkis Budin
Diabetes mellitus is often associated with cardiac functional and structural alteration, an initial event leading to cardiovascular complications. <i>Hibiscus sabdariffa</i> or roselle has been widely proven as an antioxidant and recently has incited research interest for its potential in treating cardiovascular disease. Therefore, this study aimed to determine the cardioprotective effects of <i>H. sabdariffa </i>(roselle) polyphenol-rich extract (HPE) in type-1 induced diabetic rats...
May 4, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29705703/esculetin-inhibits-oxidative-stress-and-apoptosis-in-h9c2-cardiomyocytes-following-hypoxia-reoxygenation-injury
#20
Ya He, Chen Li, Qiaoya Ma, Songsheng Chen
Esculetin (6,7-dihydroxycoumarin), a natural coumarin compound extracted from natural plants, was reported to be involved in ischemia/reperfusion (I/R) injury. However, the role of esculetin in myocardial I/R injury remains unclear. This study was designed to investigate the protective effects of esculetin on cardiomyocytes induced by hypoxia/reoxygenation (H/R), and explore the underlying mechanisms. Our results showed that esculetin improved the cell viability and decreased lactate dehydrogenase (LDH) release in H/R-stimulated H9c2 cells...
June 18, 2018: Biochemical and Biophysical Research Communications
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