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Monocrotaline

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https://www.readbyqxmd.com/read/28533073/the-impact-of-sevoflurane-on-coupling-of-the-left-ventricular-to-systemic-vasculature-in-rats-with-chronic-pulmonary-hypertension
#1
Lu Wang, Hui Luo, Gang Qin, Yanan Cao, Xiaowei Gao, Zhong Zhang, Zhi Ye, Junjie Zhang, Qulian Guo, E Wang
OBJECTIVES: The relationship between left ventricular function and afterload has not been investigated as much as the right ventricular function under chronic pulmonary hypertension (PH) during anesthesia. This study was designed to investigate effects of sevoflurane on the intrinsic coupling relationship between the left ventricle and systemic vasculature in the presence of PH. DESIGN: A randomized, controlled study. SETTING: University hospital...
February 13, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28521513/astragalus-polysaccharides-attenuate-monocrotaline-induced-pulmonary-arterial-hypertension-in-rats
#2
Lin-Bo Yuan, Chun-Yan Hua, Sheng Gao, Ya-Ling Yin, Mao Dai, Han-Yan Meng, Piao-Piao Li, Zhong-Xin Yang, Qing-Hua Hu
Astragalus polysaccharides (APS) have been shown to possess a variety of biological activities including anti-oxidant and anti-inflammation functions in a number of diseases. However, their function in pulmonary arterial hypertension (PAH) is still unknown. Rats received APS (200[Formula: see text]mg/kg once two days) for 2 weeks after being injected with monocrotaline (MCT; 60[Formula: see text]mg/kg). The pulmonary hemodynamic index, right ventricular hypertrophy, and lung morphological features of the rat models were examined, as well as the NO/eNOS ratio of wet lung and dry lung weight and MPO...
May 18, 2017: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/28496027/expression-profile-of-matricellular-proteins-in-hypertrophied-right-ventricle-of-monocrotaline-induced-pulmonary-hypertensive-rats
#3
Keisuke Imoto, Muneyoshi Okada, Hideyuki Yamawaki
Matricellular proteins, a non-structural extracellular matrix (ECM) component, bind to and modulate various molecules including growth factor, cytokine, protease, other ECM components and cell membrane receptors. While most matricellular proteins are hardly expressed in normal adult tissue, they are re-expressed in heart tissue during cardiac diseases. The present study aimed to clarify the mRNA expression profile of matricellular proteins [secreted protein acidic and rich in cysteine: SPARC, hevin, thrombospondin (TSP)-1, -2 and -4, CCN1 and 5, tenascin (Tn)C and N, periostin and osteopontin (OPN)] in hypertrophied right ventricle (RV) of monocrotaline (MCT)-induced pulmonary hypertensive rats...
May 11, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28474513/bone-marrow-endothelial-progenitor-cells-are-the-cellular-mediators-of-pulmonary-hypertension-in-the-murine-monocrotaline-injury-model
#4
Jason M Aliotta, Mandy Pereira, Sicheng Wen, Mark S Dooner, Michael Del Tatto, Elaine Papa, Yan Cheng, Laura Goldberg, Corey E Ventetuolo, Olin Liang, James R Klinger, Peter J Quesenberry
The role of bone marrow (BM) cells in modulating pulmonary hypertensive responses is not well understood. Determine if BM-derived endothelial progenitor cells (EPCs) induce pulmonary hypertension (PH) and if this is attenuated by mesenchymal stem cell (MSC)-derived extracellular vesicles (EVs). Three BM populations were studied: (a) BM from vehicle and monocrotaline (MCT)-treated mice (PH induction), (b) BM from vehicle-, MCT-treated mice that received MSC-EV infusion after vehicle, MCT treatment (PH reversal, in vivo), (c) BM from vehicle-, MCT-treated mice cultured with MSC-EVs (PH reversal, in vitro)...
May 5, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28468233/nanoparticle-mediated-drug-delivery-system-for-pulmonary-arterial-hypertension
#5
REVIEW
Kazufumi Nakamura, Hiromi Matsubara, Satoshi Akagi, Toshihiro Sarashina, Kentaro Ejiri, Norifumi Kawakita, Masashi Yoshida, Toru Miyoshi, Atsuyuki Watanabe, Nobuhiro Nishii, Hiroshi Ito
Nanoparticles have been used as a novel drug delivery system. Drug-incorporated nanoparticles for local delivery might optimize the efficacy and minimize the side effects of drugs. The efficacy and safety of intratracheal administration of prostacyclin analog (beraprost) -incorporated nanoparticles and imatinib (a PDGF-receptor tyrosine kinase inhibitor) -incorporated nanoparticles in Sugen-hypoxia-normoxia or monocrotaline rat models of pulmonary arterial hypertension (PAH) and in human PAH-pulmonary arterial smooth muscle cells have been reported...
April 29, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28450224/pinocembrin-ex-vivo-preconditioning-improves-the-therapeutic-efficacy-of-endothelial-progenitor-cells-in-monocrotaline-induced-pulmonary-hypertension-in-rats
#6
Lamiaa A Ahmed, Sherine M Rizk, Shohda A El-Maraghy
Pulmonary hypertension is still not curable and the available current therapies can only alleviate symptoms without hindering the progression of disease. The present study was directed to investigate the possible modulatory effect of pinocembrin on endothelial progenitor cells transplanted in monocrotaline-induced pulmonary hypertension in rats. Pulmonary hypertension was induced by a single subcutaneous injection of monocrotaline (60 mg/kg). Endothelial progenitor cells was in vitro preconditioned with pinocembrin (25 mg/L) for 30 min before being i...
April 24, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28431936/galectin-3-mediates-the-pulmonary-arterial-hypertension-induced-right-ventricular-remodeling-through-interacting-with-nadph-oxidase-4
#7
Jingni He, Xiaohui Li, Hui Luo, Tangzhiming Li, Lin Zhao, Qiangqiang Qi, Yuwei Liu, Zaixin Yu
Pulmonary arterial hypertension (PAH) is a progressive disorder that affects both pulmonary vasculature and the heart. The response of the right ventricle (RV) to the increased afterload is an important determinant of the PAH final outcome. Galectin-3 (Gal-3), a novel biomarker in left cardiac remodeling, takes part in multiple pathophysiological processes including the inflammation, fibrosis, immunity, and oxidative stress. The levels of Gal-3 are elevated in PAH patients, although the exact mechanisms underlie the PAH-induced right ventricular structural changes remain unclear...
March 27, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28417056/therapeutic-effect-of-prostaglandin-e1-in-monocrotaline-induced-pulmonary-arterial-hypertension-rats
#8
Jae Chul Lee
Pulmonary arterial hypertension (PAH) is a severe pulmonary vascular disease characterized by sustained increase in pulmonary arterial pressure and excessive thickening and remodeling of distal small pulmonary arteries. During disease progression, PAH include increase in mean pulmonary arterial pressure, right ventricular (RV) enlargement, increased pulmonary vascular resistance, and smooth muscle hypertrophy in pulmonary arterioles. Several anti-PAH therapies targeting various pathways involved in PAH progression have been approved by the Food and Drug Adminstration...
March 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28410199/chronic-intratracheal-application-of-the-soluble-guanylyl-cyclase-stimulator-bay-41-8543-ameliorates-experimental-pulmonary-hypertension
#9
Matthieu Amirjanians, Bakytbek Egemnazarov, Akylbek Sydykov, Baktybek Kojonazarov, Ralf Brandes, Himal Luitel, Kabita Pradhan, Johannes-Peter Stasch, Gorden Redlich, Norbert Weissmann, Friedrich Grimminger, Werner Seeger, Hossein Ghofrani, Ralph Schermuly
Dysfunction of the NO/sGC/cGMP signaling pathway has been implicated in the pathogenesis of pulmonary hypertension (PH). Therefore, agents stimulating cGMP synthesis via sGC are important therapeutic options for treatment of PH patients. An unwanted effect of this novel class of drugs is their systemic hypotensive effect. We tested the hypothesis that aerosolized intra-tracheal delivery of the sGC stimulator BAY41-8543 could diminish its systemic vasodilating effect.Pharmacodynamics and -kinetics of BAY41-8543 after single intra-tracheal delivery was tested in healthy rats...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28400261/involvement-of-astrocytic-cyp1a1-isoform-in-the-metabolism-and-toxicity-of-the-alkaloid-pyrrolizidine-monocrotaline
#10
Ravena P Nascimento, Joana L Oliveira, José Leilton C Carvalho, William A Santos, Thyago Rubens C Pires, Maria José M Batatinha, Ramon S El-Bachá, Victor Diógenes A Silva, Silvia L Costa
Monocrotaline (MCT) and its pyrrole derivative, dehydromonocrotaline (DHMC), interact with molecular targets in cells of the central nervous system. DHMC presents higher toxicity than MCT indicating that its metabolism of MCT is a critical step of this alkaloid toxicity. This study sought to elucidate the metabolism and the toxicity of MCT in C6 astrocyte cell line and primary cultures of rat astrocytes by investigating metabolic enzymatic mechanisms of the cytochrome P450 (CYP) system and conjugation with glutathione...
April 8, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28391867/ultrasensitive-immunoassay-for-monocrotaline-using-monoclonal-antibody-produced-by-n-n-carbonyldiimidazole-mediated-hapten-carrier-protein-conjugates
#11
Seiichi Sakamoto, Rika Nagamitsu, Gorawit Yusakul, Tomofumi Miyamoto, Hiroyuki Tanaka, Satoshi Morimoto
Monocrotaline (MCT) is a naturally occurring pyrrolizidine alkaloid mainly produced in plant genus Crotalaria (Fabaceae), in which various toxicities have been reported. Recently, demand of quantitative analysis for determination/detection of MCT has increased because MCT in plants can be transferred to human by food chain, leading to intoxication. In this study, monoclonal antibody (MAb) against MCT (MAb 4B8) was produced by unique one-pot conjugation between hydrolysate of MCT, retronecine (RN) and consecutive lysine residues of bovine-serum albumin (BSA) through N,N'-carbonyldiimidazole (CDI) mediated method...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28373627/effects-of-transplanted-human-cord-blood-mononuclear-cells-on-pulmonary-hypertension-in-immunodeficient-mice-and-their-distribution
#12
Mikio Sugano, Homare Yoshida, Hirotsugu Kurobe, Hiroki Arase, Hajime Kinoshita, Takashi Kitaichi, Noriko Sugasawa, Soichiro Nakayama, Kazuhisa Maeda, Minoru Irahara, Tetsuya Kitagawa
OBJECTIVES: To investigate the effects of human umbilical cord blood-derived mononuclear cell (hUCB-MNC) transplantation on pulmonary hypertension (PH) induced by monocrotaline (MCT) in immunodeficient mice and their distribution. METHODS: MCT was administered to BALB/c Slc-nu/nu mice, and PH was induced in mice 4 weeks later. Fresh hUCB-MNCs harvested from a human donor after her delivery were injected intravenously into those PH mice. The medial thickness of pulmonary arterioles, ratio of right ventricular to septum plus left ventricular weight (RV/S+LV), and ratio of acceleration time to ejection time of pulmonary blood flow waveform (AT/ET) were determined 4 weeks after hUCB-MNC transplantation...
2017: Journal of Medical Investigation: JMI
https://www.readbyqxmd.com/read/28363184/treatment-with-platelet-derived-growth-factor-pdgf-and-rock-inhibitors-is-related-to-declined-nerve-growth-factor-ngf-signaling-in-an-experimental-model-of-rat-pulmonary-hypertension
#13
Magdalena Jasińska-Stroschein, Katarzyna Oszajca, Weronika Świtlik, Justyna Ruchwa, Daria Orszulak-Michalak
BACKGROUND: Recent studies reveal that nerve growth factor (NGF) plays a critical role in the pathobiology of pulmonary hypertension (PH). The aim of the present study is to clarify the relationship between NGF signaling and treatment with PDGF or ROCK inhibitors in an animal model of PH. METHODS: Lung tissues were obtained from animals with monocrotaline (MCT)-challenged PH which had been administered long term imatinib, fasudil or statin. Reversal of disease was indicated by decreases in right ventricle pressure (RVP) and hypertrophy...
June 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28359821/rapamycin-nanoparticles-localize-in-diseased-lung-vasculature-and-prevent-pulmonary-arterial-hypertension
#14
Victor Segura-Ibarra, Javier Amione-Guerra, Ana S Cruz-Solbes, Francisca E Cara, David A Iruegas-Nunez, Suhong Wu, Keith A Youker, Arvind Bhimaraj, Guillermo Torre-Amione, Mauro Ferrari, Harry Karmouty-Quintana, Ashrith Guha, Elvin Blanco
Vascular remodeling resulting from pulmonary arterial hypertension (PAH) leads to endothelial fenestrations. This feature can be exploited by nanoparticles (NP), allowing them to extravasate from circulation and accumulate in remodeled pulmonary vessels. Hyperactivation of the mTOR pathway in PAH drives pulmonary arterial smooth muscle cell proliferation. We hypothesized that rapamycin (RAP)-loaded NPs, an mTOR inhibitor, would accumulate in diseased lungs, selectively targeting vascular mTOR and preventing PAH progression...
March 28, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28358421/extravasated-platelet-aggregation-in-the-livers-of-rats-with-drug%C3%A2-induced-hepatic-sinusoidal-obstruction-syndrome
#15
Miki Hirata, Hidehiro Tajima, Tomoharu Miyashita, Takashi Miyata, Shinichi Nakanuma, Isamu Makino, Hironori Hayashi, Katsunobu Oyama, Hiroyuki Takamura, Itasu Ninomiya, Sachio Fushida, Hiroki Nakata, Shoichi Iseki, Shinichi Harada, Tomohiko Wakayama, Tetsuo Ohta
Oxaliplatin-based chemotherapy plays an important role in the treatment of colorectal liver metastases. Oxaliplatin, however, causes sinusoidal obstruction syndrome (SOS), which is characterized by portal hypertension, splenomegaly, thrombocytopenia, and liver dysfunction. SOS is diagnosed histopathologically by disruption of the sinusoidal endothelium, collagen deposition, fibrosis especially around zone 3, dilatation of the sinusoidal space and congestion. This study assessed the characteristics of a rat model of SOS...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28351900/long-noncoding-rna-mantis-facilitates-endothelial-angiogenic-function
#16
Matthias S Leisegang, Christian Fork, Ivana Josipovic, Florian Richter, Jens Preussner, Jiong Hu, Matthew J Miller, Jeremy N Epah, Patrick Hofmann, Stefan Günther, Franziska Moll, Chanil Valasarajan, Juliana Heidler, Yuliya Ponomareva, Thomas M Freiman, Lars Maegdefessel, Karl H Plate, Michel Mittelbronn, Shizuka Uchida, Carsten Künne, Konstantinos Stellos, Ralph T Schermuly, Norbert Weissmann, Kavi Devraj, Ilka Wittig, Reinier A Boon, Stefanie Dimmeler, Soni S Pullamsetti, Mario Looso, Francis J Miller, Ralf P Brandes
Background -The angiogenic function of endothelial cells is regulated by numerous mechanisms but the impact of long noncoding RNAs (lncRNAs) has hardly been studied. We set out to identify novel and functionally important endothelial lncRNAs. Methods -Epigenetically controlled lncRNAs in human umbilical vein endothelial cells (HUVEC) were searched by exon-array analysis after knockdown of the histone demethylase JARID1B. Molecular mechanisms were investigated by RNA Pulldown and Immunoprecipitation, Mass spectrometry, Micro-array, several knockdown approaches, CRIPSR-Cas9, Assay for Transposase-Accessible Chromatin-Sequencing and chromatin immunoprecipitation in HUVEC...
March 28, 2017: Circulation
https://www.readbyqxmd.com/read/28344760/severe-pulmonary-hypertension-in-aging-female-apolipoprotein-e-deficient-mice-is-rescued-by-estrogen-replacement-therapy
#17
Soban Umar, Rod Partow-Navid, Gregoire Ruffenach, Andrea Iorga, Shayan Moazeni, Mansoureh Eghbali
BACKGROUND: Apolipoprotein E (ApoE) is a multifunctional protein, and its deficiency leads to the development of atherosclerosis in mice. Patients with pulmonary hypertension (PH) have reduced expression of ApoE in lung tissue. ApoE is known to inhibit endothelial and smooth muscle cell proliferation and has anti-inflammatory and anti-platelet aggregation properties. Young ApoE-deficient mice have been shown to develop PH on high fat diet. The combined role of female sex and aging in the development of PH has not been investigated before...
2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28340591/altered-mtor-and-beclin-1-mediated-autophagic-activation-during-right-ventricular-remodeling-in-monocrotaline-induced-pulmonary-hypertension
#18
Yan Deng, Weifeng Wu, Shenglan Guo, Yuming Chen, Chang Liu, Xingcui Gao, Bin Wei
BACKGROUND: Right ventricular structure and function is a major predictor of outcomes in pulmonary hypertension (PH), yet the underlying mechanisms remain poorly understood. Growing evidence suggests the importance of autophagy in cardiac remodeling; however, its dynamics in the process of right ventricle(RV) remodeling in PH has not been fully explored. We sought to study the time course of cardiomyocyte autophagy in the RV in PH and determine whether mammalian target of rapamycin (mTOR) and Beclin-1 hypoxia-related pro-autophagic pathways are underlying mechanisms...
March 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28337251/pentaerythritol-tetranitrate-in-vivo-treatment-improves-oxidative-stress-and-vascular-dysfunction-by-suppression-of-endothelin-1-signaling-in-monocrotaline-induced-pulmonary-hypertension
#19
Sebastian Steven, Matthias Oelze, Moritz Brandt, Elisabeth Ullmann, Swenja Kröller-Schön, Tjebo Heeren, Lan P Tran, Steffen Daub, Mobin Dib, Dirk Stalleicken, Philip Wenzel, Thomas Münzel, Andreas Daiber
Objective. Oxidative stress and endothelial dysfunction contribute to pulmonary arterial hypertension (PAH). The role of the nitrovasodilator pentaerythritol tetranitrate (PETN) on endothelial function and oxidative stress in PAH has not yet been defined. Methods and Results. PAH was induced by monocrotaline (MCT, i.v.) in Wistar rats. Low (30 mg/kg; MCT30), middle (40 mg/kg; MCT40), or high (60 mg/kg; MCT60) dose of MCT for 14, 28, and 42 d was used. MCT induced endothelial dysfunction, pulmonary vascular wall thickening, and fibrosis, as well as protein tyrosine nitration...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28332747/ultra-performance-liquid-chromatography-hyphenated-with-quadrupole-orbitrap-mass-spectrometry-for-simultaneous-determination-of-necine-core-structure-pyrrolizidine-alkaloids-in-crotalaria-sessiliflora-l-without-all-corresponding-standards
#20
Wei Zhang, Wenbei Huai, Yi Zhang, Jincan Shen, Xunyou Tang, Xiujuan Xie, Ke Wang, Huajun Fan
INTRODUCTION: Crotalaria sessiliflora L. is a Chinese traditional herb for treatment of cutaneum carcinoma and cervical carcinoma. In addition to monocrotaline, coexisting pyrrolizidine alkaloids (PAs) also require further quantification for quality control and pharmaceutical uses of the herb. OBJECTIVE: To establish a UPLC-Q-Orbitrap/MS method of simultaneous determination of coexisting PAs with same parent structure for quality control and comprehensive researches of Crotalaria sessiliflora L...
March 23, 2017: Phytochemical Analysis: PCA
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