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stress induced cardiomyopathy

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https://www.readbyqxmd.com/read/27913284/cardiac-proteasome-functional-insufficiency-plays-a-pathogenic-role-in-diabetic-cardiomyopathy
#1
Jie Li, Wenxia Ma, Guihua Yue, Yaoliang Tang, Il-Man Kim, Neal L Weintraub, Xuejun Wang, Huabo Su
BACKGROUND: Diabetic cardiomyopathy is a major risk factor in diabetic patients but its pathogenesis remains poorly understood. The ubiquitin-proteasome system (UPS) facilitates protein quality control by degrading unnecessary and damaged proteins in eukaryotic cells, and dysfunction of UPS is implicated in various cardiac diseases. However, the overall functional status of the UPS and its pathophysiological role in diabetic cardiomyopathy have not been determined. METHODS AND RESULTS: Type I diabetes was induced in wild-type and transgenic mice expressing a UPS functional reporter (GFPdgn) by injections of streptozotocin (STZ)...
November 29, 2016: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/27902980/gene-expression-profiling-and-functional-characterization-of-macrophages-in-response-to-circulatory-microparticles-produced-during-trypanosoma-cruzi-infection-and-chagas-disease
#2
Imran H Chowdhury, Sue-Jie Koo, Shivali Gupta, Lisa Yi Liang, Bojlul Bahar, Laura Silla, Julio Nuñez-Burgos, Natalia Barrientos, Maria Paola Zago, Nisha Jain Garg
BACKGROUND: Chronic inflammation and oxidative stress are hallmarks of chagasic cardiomyopathy (CCM). In this study, we determined if microparticles (MPs) generated during Trypanosoma cruzi (Tc) infection carry the host's signature of the inflammatory/oxidative state and provide information regarding the progression of clinical disease. METHODS: MPs were harvested from supernatants of human peripheral blood mononuclear cells in vitro incubated with Tc (control: LPS treated), plasma of seropositive humans with a clinically asymptomatic (CA) or symptomatic (CS) disease state (vs...
December 1, 2016: Journal of Innate Immunity
https://www.readbyqxmd.com/read/27896787/extracorporeal-membrane-oxygenation-for-pheochromocytoma-induced-cardiogenic-shock
#3
Guillaume Hekimian, Fatima Kharcha, Nicolas Bréchot, Matthieu Schmidt, Cécile Ghander, Guillaume Lebreton, Xavier Girerd, Christophe Tresallet, Jean-Louis Trouillet, Pascal Leprince, Jean Chastre, Alain Combes, Charles-Edouard Luyt
BACKGROUND: Pheochromocytoma, a rare catecholamine-producing tumor, might provoke stress-induced Takotsubo-like cardiomyopathy and severe cardiogenic shock. Because venoarterial-extracorporeal membrane oxygenation (VA-ECMO) rescue of pheochromocytoma-induced refractory cardiogenic shock has rarely been reported, we reviewed our ICU patients' presentations and outcomes. METHODS: All pheochromocytoma-induced refractory cardiogenic shock cases managed with VA-ECMO (January 2007-March 2015) were prospectively included and reviewed...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27893829/sansevieria-roxburghiana-schult-schult-f-family-asparagaceae-attenuates-type-2-diabetes-and-its-associated-cardiomyopathy
#4
Niloy Bhattacharjee, Ritu Khanra, Tarun K Dua, Susmita Das, Bratati De, M Zia-Ul-Haq, Vincenzo De Feo, Saikat Dewanjee
BACKGROUND: Sansevieria roxburghiana Schult. & Schult. F. (Family: Asparagaceae) rhizome has been claimed to possess antidiabetic activity in the ethno-medicinal literature in India. Therefore, present experiments were carried out to explore the protective role of edible (aqueous) extract of S. roxburghiana rhizome (SR) against experimentally induced type 2 diabetes mellitus (T2DM) and its associated cardiomyopathy in Wistar rats. METHODS: SR was chemically characterized by GC-MS analysis...
2016: PloS One
https://www.readbyqxmd.com/read/27889753/renal-denervation-attenuates-multi-organ-fibrosis-and-improves-vascular-remodeling-in-rats-with-transverse-aortic-constriction-induced-cardiomyopathy
#5
Kai Wang, Dasheng Lu, Bin Zhang, Shengchan Wang, Qian Liu, Qi Zhang, Jie Geng, Qijun Shan
BACKGROUND/AIMS: To investigate the effects of renal denervation (RDN) on multi-organ fibrosis and vascular remodeling in cardiomyopathy. METHODS: Thirty-six male Sprague-Dawley rats underwent transverse aortic constriction (TAC). Five weeks later, 28 surviving TAC rats were randomly assigned to three groups: (1) RDN, (2) Sham, (3) Carvedilol. Six male Sham TAC rats served as the Control. Ten weeks after TAC, samples were collected. RESULTS: TAC rats showed an increased diastolic interventricular septal thickness at week 5...
November 25, 2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27882442/the-effects-of-zofenopril-on-cardiac-function-and-pro-oxidative-parameters-in-the-streptozotocin-induced-diabetic-rat-heart
#6
Petar Ristic, Ivan Srejovic, Tamara Nikolic, Isidora Stojic, Dragana Ristic, Vladimir Zivkovic, Vladimir Lj Jakovljevic
Diabetes mellitus is a chronic condition that continues to increase in both incidence and prevalence. Renin-Angiotensin-Aldosterone System is one of the main modulators of chronic hyperglycaemia and, thus, its influence on tissues. Hyperglycaemia-induced oxidative stress is an important factor in diabetic cardiomyopathy. The present study was carried out on 24 adult male Wistar albino rats (8-week-old and with body masses of 190 ± 10 g). We evaluated the influence of acute administration of zofenopril on ex vivo myocardial function from rats with streptozotocin-induced diabetes mellitus, with a special emphasis on cardiodynamic and oxidative stress parameters in diabetic rat hearts...
November 24, 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27882138/impact-of-ethyl-pyruvate-on-adriamycin-induced-cardiomyopathy-in-rats
#7
Menglin Liu, Menglong Wang, Jianfang Liu, Zhen Luo, Lei Shi, Ying Feng, Li Li, Lin Xu, Jun Wan
Ethyl pyruvate (EP), a derivative of pyruvic acid, is known to have protective effects against ischemic cardiomyopathy and other disorders. However, little is known about its role in Adriamycin (ADR)-induced cardiomyopathy. The present study was designed to investigate the impact of EP on ADR-induced cardiomyopathy in an animal model. Sixty male Sprague-Dawley (SD) rats were divided into four groups: Normal control, EP, ADR and ADR + EP groups (n=15/group). Rats in the ADR and ADR + EP groups were treated with ADR (2...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27882121/stress-induced-cardiomyopathy-following-infection-of-the-upper-respiratory-tract-in-an-elderly-female-patient-a-case-report
#8
Huaiyu Ding, Rongchong Huang, Xiaoli Shi, Baolin Wu
Stress-induced cardiomyopathy (SIC), also known as takotsubo cardiomyopathy (TTC), is a relatively newly-described condition, which has been increasingly reported in the literature. It is characterized by acute onset of symptoms and electrocardiogram changes mimicking myocardial infarction, with transient but completely reversible left ventricular (LV) dysfunction. SIC commonly occurs following physical or emotional stress. The present study discusses the case of a 68-year-old female patient who had suffered from infection of the upper respiratory tract for 10 days before admission to the hospital with symptoms of chest stuffiness and dyspnea that persisted for 2 days...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27871808/new-mechanism-of-lipotoxicity-in-diabetic-cardiomyopathy-deficiency-of-endogenous-h2s-production-and-er-stress
#9
Runmin Guo, Zijun Wu, Jiamei Jiang, Chang Liu, Bin Wu, Xingyue Li, Teng Li, Hailiang Mo, Songjian He, Shanghai Li, Hai Yan, Ruina Huang, Qiong You, Keng Wu
OBJECTIVE: To investigate the roles and mechanisms of endogenous hydrogen sulfide (H2S) and endoplasmic reticulum (ER) stress in the development of diabetic cardiomyopathy (DCM). METHODS: Blood of DCM patients included in the study were collected. The model of DCM rats was established using streptozotocin (STZ) injection. Cardiac lipotoxicity in vitro models were established using 500μM palmitic acid (PA) treatment for 24h in AC16 cardiomyocytes. Endogenous H2S production in plasma, culture supernatant and heart was measured by sulphur ion-selective electrode assay...
November 18, 2016: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/27862268/novel-protective-role-of-nuclear-melatonin-receptor-ror%C3%AE-in-diabetic-cardiomyopathy
#10
Yichao Zhao, Longwei Xu, Song Ding, Nan Lin, Qingqi Ji, Lingchen Gao, Yuanyuan Su, Jun Pu, Ben He
Diabetic cardiomyopathy is a major complication that significantly contributes to morbidity and mortality in diabetics with few therapies. Moreover, anti-diabetic drugs reported inconsistent or even adverse cardiovascular effects, suggesting it is important to exploit novel therapeutic targets against diabetic cardiomyopathy. Here, we observed that the nuclear melatonin receptor, the retinoic acid-related orphan receptor α (RORα), was downregulated in diabetic hearts. By utilizing a mouse line with RORα disruption, we demonstrated that RORα deficiency led to significantly augmented diastolic dysfunction and cardiac remodeling induced by diabetes...
November 18, 2016: Journal of Pineal Research
https://www.readbyqxmd.com/read/27859591/nrf2-activation-as-a-protective-feedback-to-limit-cell-death-in-high-glucose-exposed-cardiomyocytes
#11
Cheng-Yen Tsai, Su-Ying Wen, Shi-Yann Cheng, Chung-Hsing Wang, Yao-Chih Yang, Chih-Yang Huang, Wei-Wen Kuo
Hyperglycemia leads to excess reactive oxygen species (ROS) generation, which causes many diabetic complications, such as cardiomyopathy. Nuclear factor erythroid 2-related factor 2 (Nrf2), a redox-sensing transcription factor, can up-regulate its downstream antioxidant gene expressions in response to oxidative stress. However, the regulatory signal pathway in which high glucose (HG) induces Nrf2 activation is still unclear. Our results demonstrated that HG (33mM) can indeed stimulate Nrf2 protein expression and translocation into the nucleus in cardiomyocytes, enhancing the downstream antioxidant protein levels...
November 9, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27856611/loss-of-akap150-promotes-pathological-remodelling-and-heart-failure-propensity-by-disrupting-calcium-cycling-and-contractile-reserve
#12
Lei Li, Jing Li, Benjamin M Drum, Yi Chen, Haifeng Yin, Xiaoyun Guo, Stephen W Luckey, Merle L Gilbert, G Stanley McKnight, John D Scott, L Fernando Santana, Qinghang Liu
AIMS: Impaired Ca(2 + )cycling and myocyte contractility are a hallmark of heart failure triggered by pathological stress such as hemodynamic overload. The A-Kinase anchoring protein AKAP150 has been shown to coordinate key aspects of adrenergic regulation of Ca(2+ )cycling and excitation-contraction in cardiomyocytes. However, the role of the AKAP150 signalling complexes in the pathogenesis of heart failure has not been investigated. METHODS AND RESULTS: Here we examined how AKAP150 signalling complexes impact Ca(2+ )cycling, myocyte contractility, and heart failure susceptibility following pathological stress...
November 17, 2016: Cardiovascular Research
https://www.readbyqxmd.com/read/27851254/1619-sepsis-induced-isolated-right-ventricular-stress-cardiomyopathy-masquerading-as-pulmonary-embolism
#13
Ishan Malhotra, Hatem Desoky, Mangalore Amith Shenoy, Shyam Shankar, Pavan Irukulla, Benhoor Shamian, Yizhak Kupfer, Richard Periut
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27833703/reduced-hmgb-1-mediated-pathway-and-oxidative-stress-in-resveratrol-treated-diabetic-mice-a-possible-mechanism-of-cardioprotection-of-resveratrol-in-diabetes-mellitus
#14
Han Wu, Zhen-Qiang Sheng, Jun Xie, Ran Li, Liang Chen, Guan-Nan Li, Lian Wang, Biao Xu
Myocardial fibrosis and inflammation are intricately linked in diabetic cardiomyopathy (DCM), and resveratrol has been shown to attenuate oxidative stress, inflammation, and fibrosis in several cell types or animal models. High mobility group box 1 (HMGB 1), a proinflammatory cytokine, has been reported to regulate fibrosis and inflammation in various organs. Then the present study aimed to reveal the expression of HMGB 1-mediated signaling pathway and oxidative stress in resveratrol-treated diabetic mice. The significant increase in serum HMGB 1 concentration in diabetic mice was attenuated by treatment with resveratrol...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27827456/2-aminobutyric-acid-modulates-glutathione-homeostasis-in-the-myocardium
#15
Yasuhiro Irino, Ryuji Toh, Manabu Nagao, Takeshige Mori, Tomoyuki Honjo, Masakazu Shinohara, Shigeyasu Tsuda, Hideto Nakajima, Seimi Satomi-Kobayashi, Toshiro Shinke, Hidekazu Tanaka, Tatsuro Ishida, Okiko Miyata, Ken-Ichi Hirata
A previous report showed that the consumption of glutathione through oxidative stress activates the glutathione synthetic pathway, which is accompanied by production of ophthalmic acid from 2-aminobutyric acid (2-AB). We conducted a comprehensive quantification of serum metabolites using gas chromatography-mass spectrometry in patients with atrial septal defect to find clues for understanding myocardial metabolic regulation, and demonstrated that circulating 2-AB levels reflect hemodynamic changes. However, the metabolism and pathophysiological role of 2-AB remains unclear...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27816939/o-glcnacylation-of-ogg1-impairs-oxidative-mitochondrial-dna-lesion-repair-in-diabetic-hearts
#16
Federico Cividini, Brian T Scott, Anzhi Dai, Wenlong Han, Jorge Suarez, Julieta Diaz-Juarez, Tanja Diemer, Darren E Casteel, Wolfgang H Dillmann
Mitochondrial DNA (mtDNA) damage in cardiac myocytes resulting from increased oxidative stress is emerging as an important factor in the pathogenesis of diabetic cardiomyopathy. A prevalent lesion that occurs in mtDNA damage is the formation of 8-hydroxy-2-deoxyguanosine (8-OHdG), which can cause mutations if not repaired properly by 8-oxoguanine DNA glycosylase (Ogg1). Although the mtDNA repair machinery has been described in cardiac myocytes, the regulation of this repair has been incompletely investigated...
November 5, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27810791/the-protective-role-of-liquiritin-in-high-fructose-induced-myocardial-fibrosis-via-inhibiting-nf-%C3%AE%C2%BAb-and-mapk-signaling-pathway
#17
Yuan Zhang, Lei Zhang, Yi Zhang, Jin-Jin Xu, Li-Li Sun, Shuang-Zhan Li
Diabetic cardiomyopathy has been known as an important complication of diabetes and characterized by persistent diastolic dysfunction, resulting in myocardial fibrosis, which is associated inflammatory response and oxidative stress. Liquiritin is a major constituent of Glycyrrhiza Radix, possessing various pharmacological activities and exhibiting various positive biological effects, including anti-cancer, anti-oxidative and neuroprotective effects. Here, we investigated the anti-inflammatory properties and protective effects of lquiritin in high fructose-induced mice and cardiomyocytes to clarify the potential mechanism...
October 31, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27805735/carvedilol-and-antioxidant-proteins-in-a-type-i-diabetes-animal-model
#18
Cátia V Diogo, Cláudia M Deus, Magdalena Lebiedzinska-Arciszewska, Aleksandra Wojtala, Mariusz R Wieckowski, Paulo J Oliveira
BACKGROUND: Patients with diabetes are at a high risk of developing both micro- and macro-vascular disease. Hyperglycaemia seems to be the main factor in the pathogenesis of diabetic cardiomyopathy, often based on increased oxidative stress. Carvedilol, a β-adrenergic blocker has intrinsic antioxidant properties and was previously described to be effective in the protection of cardiac mitochondria against oxidative stress. The objective of this study was to evaluate the effect of Carvedilol on hyperglycaemia-induced oxidative damage and mitochondrial abnormalities in cardiac and skeletal muscle in streptozotocin-treated rats...
November 2, 2016: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27805244/takotsubo-cardiomyopathy-post-liver-transplantation
#19
Ahmed Vachiat, Keir McCutcheon, Adam Mahomed, Gunter Schleicher, Liezl Brand, Jean Botha, Martin Sussman, Pravin Manga
A patient with end-stage liver disease developed stress-induced Takotsubo cardiomyopathy post liver transplantation, with haemodynamic instability requiring a left ventricular assist device. We discuss the diagnosis and management of this condition.
October 23, 2016: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/27802903/dendrobium-officinale-kimura-et-migo-attenuates-diabetic-cardiomyopathy-through-inhibiting-oxidative-stress-inflammation-and-fibrosis-in-streptozotocin-induced-mice
#20
Zhihao Zhang, Duoduo Zhang, Mengmeng Dou, Zhubo Li, Jie Zhang, Xiaoyan Zhao
Dendrobium officinale Kimura et Migo (Dendrobium catenatum Lindley), a prized traditional Chinese Medicine, has been used in China and Southeast Asian countries for centuries. The present study was aimed to investigate the effects and the possible mechanisms of the Dendrobium officinale extracts (DOE) on diabetic cardiomyopathy in mice. The diabetic model was induced by intraperitoneal injection of streptozotocin at the dose of 50mg/kg body weight for 5 consecutive days. After 8 weeks treatment of DOE, mice were sacrificed, blood sample and heart tissues were collected...
October 29, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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