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Monocrotaline

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https://www.readbyqxmd.com/read/29151490/ppar%C3%AE-alleviates-right-ventricular-failure-secondary-to-pulmonary-arterial-hypertension-in-rats
#1
Ying Xu, Qin Gu, Ning Liu, Yan Yan, Xilan Yang, Yingying Hao, Chen Qu
Pulmonary arterial hypertension (PAH) is characterized by pulmonary vascular remodeling leading to right ventricular hypertrophy (RVH) and failure. Peroxisome proliferator-activated receptor γ (PPARγ), a member of nuclear receptors, has been proved to ameliorate PAH. However, its effect on PAH-induced right ventricular failure (RVF) remains unknown. Therefore, we investigated the therapeutic potential of PPARγ in preventing monocrotaline (MCT) -induced RV dysfunction. The PAH model was induced by MCT administration...
November 17, 2017: International Heart Journal
https://www.readbyqxmd.com/read/29151278/tetrahydrobiopterin-bh4-targeting-endothelial-nitric-oxide-synthase-as-a-potential-therapy-for-pulmonary-hypertension
#2
Bahaa N Francis, Maram Salameh, Rola Khamisy-Farah, Raymond Farah
PURPOSE: Pulmonary Hypertension (PH) is complex disease which is associated with endothelial and cardiac dysfunction. Tetrahydrobiopterin (BH4 ) regulates endothelial nitric oxide synthase (eNOS) to produce nitric oxide rather than superoxide which maintains normal endothelial and cardiac function. This study explores the therapeutic potential of BH4 in experimental PH. METHODS: Monocrotaline-induced PH in rats and Hph-1 deficiency in mice were used for animal experiments...
November 19, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/29146614/heart-rate-reduction-improves-biventricular-function-and-interactions-in-experimental-pulmonary-hypertension
#3
Olga Gomez, Kenichi Okumura, Osami Honjo, Mei Sun, Ryo Ishii, Bart Bijens, Mark K Friedberg
OBJECTIVES: To investigate mechanisms of heart rate (HR) reduction on biventricular function and interactions in experimental pulmonary arterial hypertension (PAH). METHODS: We compared cardiac-cycle mechanics and interventricular interactions in 15 sham, 8 monocrotaline-PAH, 9 PAH+carvedilol and 8 PAH+ivabradine rats. We used echocardiography to assess biventricular function, timing of cardiac- cycle events and septal position in PAH rats; and related HR reduction effect on biventricular function measured by echocardiography and conductance catheter...
November 16, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29146573/prostanoid-ep4-agonist-l-902-688-activates-ppar%C3%AE-and-attenuates-pulmonary-arterial-hypertension
#4
Hsin-Hsien Li, Hsao-Hsun Hsu, Gwo-Jyh Chang, I-Chen Chen, Wan-Jing Ho, Pei-Chen Hsu, Wei-Jan Chen, Jong-Hwei Su Pang, Chung-Chi Huang, Ying-Ju Lai
Prostacyclin agonists that bind the prostacyclin receptor (IP) to stimulate cyclic adenosine monophosphate (cAMP) synthesis are effective vasodilators for the treatment of idiopathic pulmonary arterial hypertension (IPAH) but this signaling may occur through nuclear peroxisome proliferator-activated receptor-gamma (PPARγ). There is evidence of scant IP and PPARγ expression but stable prostanoid EP4 receptor (EP4) expression in IPAH patients. Both IP and EP4 functionally couple with stimulatory G protein (Gs), which activate signal transduction...
November 16, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29146527/osthole-attenuates-right-ventricular-remodeling-via-decreased-myocardial-apoptosis-and-inflammation-in-monocrotaline-induced-rats
#5
Yeli Li, Yiqi Li, Fuguo Shi, Lina Wang, Lisheng Li, Danli Yang
Osthole (Ost) is a coumarin that exhibits wide pharmacological effects in the cardiovascular system. However, whether Ost can inhibit apoptosis and inflammation in right ventricle (RV) cardiomyocytes and prevent RV remodeling is not clear. This study was designed to investigate the effect of Ost on RV remodeling and the underlying mechanism. By applying a monocrotaline (MCT)-induced rat model, the effect of Ost on RV remodeling was investigated. Rats were given a single dose of MCT (50mg⁄kg) subcutaneously (s...
November 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29146157/angiotensin-converting-enzyme-2-activation-ameliorates-pulmonary-endothelial-dysfunction-in-rats-with-pulmonary-arterial-hypertension-through-mediating-phosphorylation-of-endothelial-nitric-oxide-synthase
#6
Gang Li, Han Zhang, Lei Zhao, Yaozhong Zhang, Daole Yan, Yinglong Liu
This study aims to investigate the effect of angiotensin-converting enzyme 2 (ACE2) activation on pulmonary endothelial function in the process of preventing pulmonary arterial hypertension (PAH) in rat models and to explore the underlying mechanisms. Specific pathogen free rats were randomly divided into five groups including control group, PAH group, PAH + Resorcinolnaphthalein (Res) group (ACE2 activation), PAH + Res + MLN4760 group (ACE2 inhibition), and PAH + Res + L-NAME group (endothelial nitric oxide synthase [eNOS] inhibition)...
October 28, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29133079/baicalein-attenuates-monocrotaline-induced-pulmonary-arterial-hypertension-by-inhibiting-vascular-remodeling-in-rats
#7
Ruizan Shi, Zehui Wei, Diying Zhu, Naijie Fu, Wang Chang, Sha Yin, Yueqin Liang, Jianfeng Xing, Xuening Wang, Yan Wang
BACKGROUND: Pulmonary arterial hypertension (PAH) is a devastating cardiopulmonary disorder characterized by elevated pulmonary arterial pressure (PAP) and right ventricular hypertrophy (RVH) driven by progressive vascular remodeling. Reversing adverse vascular remodeling is an important concept in the treatment of PAH. Endothelial injury, inflammation, and oxidative stress are three main contributors to pulmonary vascular remodeling. Baicalein is a natural flavonoid that has been shown to possess anti-proliferative, anti-inflammatory, anti-oxidative, and cardioprotective properties...
November 10, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29115380/combination-treatment-of-adipose-derived-stem-cells-and-adiponectin-attenuates-pulmonary-arterial-hypertension-in-rats-by-inhibiting-pulmonary-arterial-smooth-muscle-cell-proliferation-and-regulating-the-ampk-bmp-smad-pathway
#8
Li Luo, Wuhong Zheng, Guili Lian, Huaning Chen, Ling Li, Changsheng Xu, Liangdi Xie
The present study aimed to assess the effects of therapy with adiponectin (APN) gene-modified adipose-derived stem cells (ADSCs) on pulmonary arterial hypertension (PAH) in rats and the underlying cellular and molecular mechanisms. ADSCs were successfully isolated from the rats and characterized. ADSCs were effectively infected with the green fluorescent protein (GFP)-empty (ADSCs-V) or the APN-GFP (ADSCs-APN) lentivirus and the APN expression was evaluated by ELISA. Sprague-Dawley rats were administered monocrotaline (MCT) to develop PAH...
October 31, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29100963/reversal-effects-of-low-dose-imatinib-compared-with-sunitinib-on-monocrotaline-induced-pulmonary-and-right-ventricular-remodeling-in-rats
#9
Zi Ping Leong, Ayumi Okida, Masahi Higuchi, Yoshiaki Yamano, Yoshiaki Hikasa
High-dose imatinib reverses cardiopulmonary remodeling but adverse effects limit its clinical use. Efficacy of the multi-kinase inhibitor sunitinib remains questionable. We compared anti-remodeling effects of imatinib with sunitinib on monocrotaline-induced right ventricular (RV) hypertrophy and pulmonary arterial remodeling in rats, focusing on a lower dose. Fourteen days after monocrotaline injection, oral gavage of imatinib (5, 15, or 50mg/kg), sunitinib (0.3, 1, 3, or 10mg/kg), or water for 14days was started...
October 31, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/29097423/docosahexaenoic-acid-inhibits-monocrotaline-induced-pulmonary-hypertension-via-attenuating-endoplasmic-reticulum-stress-and-inflammation
#10
Rui Chen, Wei Zhong, Chen Shao, Peijing Liu, Cuiping Wang, Zhongqun Wang, Meiping Jiang, Yi Lu, Jinchuan Yan
Endoplasmic reticulum (ER) stress and inflammation contribute to pulmonary hypertension (PH) pathogenesis. Previously, we confirmed docosahexaenoic acid (DHA) could improve hypoxic-induced PH. However, little is known about the link between DHA and monocrotaline (MCT)-induced PH. Our aims were, therefore, to evaluate the effects and molecular mechanisms of DHA on MCT-induced PH in rat. Rat PH was induced by MCT. Rats were treated with DHA daily in prevention group (following MCT injection) and reversal group (after MCT injection for 2 weeks) by gavage...
November 2, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29078260/dihydromyricetin-prevents-monocrotaline-induced-pulmonary-arterial-hypertension-in-rats
#11
Qinghai Li, Jun Wang, Xianying Zhu, Zhilin Zeng, Xiaomei Wu, Yongjian Xu, Jungang Xie, Jun Yu
Pulmonary artery hypertension (PAH) is a chronic and deadly disease, for which effective medical treatments are lacking. Here, we investigated whether 2R,3R-dihydromyricetin (DHM) could prevent monocrotaline (MCT)-induced PAH in rats. The MCT-injected rats were treated with normal saline or DHM (100mg/kg body weight/d) for 4 weeks, followed by measurements of right ventricular systolic pressure (RVSP), right ventricular hypertrophy index (RVHI), pulmonary arterial remodeling (PAR), and expression levels of IL-6, TNF-α, and IL-10...
October 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29061062/clinical-and-histopathological-relationship-of-sildenafil-and-bosentan-treatments-in-rats-with-monocrotaline-induced-pulmonary-hypertension
#12
D Karpuz, O Hallioglu, B Buyukakilli, S Gurgul, E Balli, M Ozeren, B Tasdelen
BACKGROUND: Pulmonary arterial hypertension (PAH) is a challenging disorder characterized by increasing pulmonary artery pressure, which is hard to treat. OBJECTIVE: This study was aimed to investigate the effects of bosentan, sildenafil and their combination. METHODS: Saline or MCT were applied to Wistar rats. By the development of PAH (4th week), MCT-given rats were treated orally with bosentan, sildenafil and combination of sildenafil and bosentan or placebo...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29050921/the-phenomena-of-mechanical-interaction-of-segments-of-hypertrophied-myocardium
#13
REVIEW
Alexander Balakin, Daniil Kuznetsov, Yuri Protsenko
The main aims of adaptation mechanisms of heart contractility are to regulate the stroke volume and optimize the global heart function. These mechanisms manifest themselves in hearts of healthy animals and in hearts with severe hypertrophy in different ways. Severe right ventricle hypertrophy was induced by single treatment with monocrotaline. Young rats of both sexes were used to prevent influences of sex hormones on the development of right ventricular hypertrophy. Serial duplex method is used as a model of interaction of two ventricular wall segments...
October 16, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/29043105/retraction-notice-to-therapeutic-effect-of-prostaglandin-e1-in-monocrotaline-induced-pulmonary-arterial-hypertension-rats-by-lee-jc-anat-cell-biol-2017-50-60-8
#14
Jae Chul Lee
[This retracts the article on p. 60 in vol. 50, PMID: 28417056.].
September 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29039598/expression-of-key-enzymes-in-the-mevalonate-pathway-are-altered-in-monocrotaline-induced-pulmonary-arterial-hypertension-in-rats
#15
Dongmei Jiang, Yu Chen, Yuxiang Zhu, Guosheng Fu, Shiming Xu
Pulmonary arterial hypertension (PAH) is a serious pulmonary vascular disease. The changes in the structure, function and metabolism of endothelial cells are some of the important features of PAH. Previous studies have demonstrated that the mevalonate pathway is important in cardiovascular remodeling. However, whether the mevalonate pathway is involved in the development of PAH remains to be elucidated. The present study aimed to investigate the expression pattern of mevalonate pathway-related enzymes in monocrotaline (MCT)-induced PAH...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29016733/endothelial-to-haematopoietic-transition-contributes-to-pulmonary-arterial-hypertension
#16
Olin D Liang, Eui-Young So, Pamela C Egan, Laura R Goldberg, Jason M Aliotta, Keith Q Wu, Patrycja M Dubielecka, Corey E Ventetuolo, Anthony M Reginato, Peter J Quesenberry, James R Klinger
Aims: The pathogenic mechanisms of pulmonary arterial hypertension (PAH) remain unclear, but involve dysfunctional endothelial cells (ECs), dysregulated immunity and inflammation in the lung. We hypothesize that a developmental process called endothelial to haematopoietic transition (EHT) contributes to the pathogenesis of pulmonary hypertension (PH). We sought to determine the role of EHT in mouse models of PH, to characterize specific cell types involved in this process, and to identify potential therapeutic targets to prevent disease progression...
November 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29016730/microrna-424-322-as-a-new-marker-of-disease-progression-in-pulmonary-arterial-hypertension-and-its-role-in-right-ventricular-hypertrophy-by-targeting-smurf1
#17
Rui Baptista, Carla Marques, Steve Catarino, Francisco J Enguita, Marina C Costa, Paulo Matafome, Mónica Zuzarte, Graça Castro, Abílio Reis, Pedro Monteiro, Mariano Pêgo, Paulo Pereira, Henrique Girão
MicroRNAs (miRNAs) have been implicated in the pathogenesis of pulmonary hypertension (PH), a multifactorial and progressive condition associated with an increased afterload of the right ventricle leading to heart failure and death. The main aim of this study was to correlate the levels of miR-424(322) with the severity and prognosis of PH and with right ventricle hypertrophy progression. Additionally, we intended to evaluate the mechanisms and signaling pathways whereby miR-424(322) secreted by pulmonary endothelial cells (PAECs) impacts cardiomyocytes...
September 12, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28987376/pyrrolizidine-alkaloid-derived-dna-adducts-are-common-toxicological-biomarkers-of-pyrrolizidine-alkaloid-n-oxides
#18
Xiaobo He, Qingsu Xia, Kellie Woodling, Ge Lin, Peter P Fu
There are 660 pyrrolizidine alkaloids (PAs) and PA N-oxides present in the plants, with approximately half being possible carcinogens. We previously reported that a set of four PA-derived DNA adducts is formed in the liver of rats administered a series of hepatocarcinogenic PAs and a PA N-oxide. Based on our findings, we hypothesized that this set of DNA adducts is a common biological biomarker of PA-induced liver tumor formation. In this study, we determined that rat liver microsomal metabolism of five hepatocarcinogenic PAs (lasiocarpine, retrorsine, riddelliine, monocrotaline, and heliotrine) and their corresponding PA N-oxides produced the same set of DNA adducts...
October 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28974347/fatty-acid-synthase-modulates-proliferation-metabolic-functions-and-angiogenesis-in-hypoxic-pulmonary-artery-endothelial-cells
#19
Neetu Singh, Himalaya Singh, Kumaravelu Jagavelu, M Wahajuddin, Kashif Hanif
Endothelial dysfunction plays an important role in structural remodeling occurring in the pulmonary vasculature during pulmonary hypertension (PH). Endothelial injury causes apoptosis and activation of endothelial cells. However, some endothelial cells show apoptosis-resistance and later proliferate extensively leading to vascular oculopathy and formation of plexiform lesions in PH. Studies have shown that rapidly proliferating cells exhibit increased expression of Fatty acid synthase (FAS), a regulatory enzyme responsible for the production of fatty acids...
September 30, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28974252/mesenchymal-stromal-cell-therapy-reduces-lung-inflammation-and-vascular-remodeling-and-improves-hemodynamics-in-experimental-pulmonary-arterial-hypertension
#20
Lucas de Mendonça, Nathane S Felix, Natália G Blanco, Jaqueline S Da Silva, Tatiana P Ferreira, Soraia C Abreu, Fernanda F Cruz, Nazareth Rocha, Patrícia M Silva, Vanessa Martins, Vera L Capelozzi, Gizele Zapata-Sudo, Patricia R M Rocco, Pedro L Silva
BACKGROUND: Experimental research has reported beneficial effects of mesenchymal stromal cell (MSC) therapy in pulmonary arterial hypertension (PAH). However, these studies either were based on prophylactic protocols or assessed basic remodeling features without evaluating possible mechanisms. We analyzed the effects of MSC therapy on lung vascular remodeling and hemodynamics and its possible mechanisms of action in monocrotaline (MCT)-induced PAH. METHODS: Twenty-eight Wistar rats were randomly divided into two groups...
October 3, 2017: Stem Cell Research & Therapy
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