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https://www.readbyqxmd.com/read/28925017/early-treatment-with-resolvin-e1-facilitates-myocardial-recovery-from-ischemia-in-mice
#1
Guizhu Liu, Qian Liu, Yujun Shen, Deping Kong, Yanjun Gong, Bo Tao, Guilin Chen, Shumin Guo, Juanjuan Li, Shengkai Zuo, Yu Yu, Huiyong Yin, Li Zhang, Bin Zhou, Colin D Funk, Jian Zhang, Ying Yu
BACKGROUND AND PURPOSE: An appropriate inflammatory response is necessary for cardiac healing after acute myocardial infarction (MI). Resolvin E1 (RvE1) is an anti-inflammatory and pro-resolution lipid mediator derived from eicosapentaenoic acid. The purpose of this study was to investigate the potential effects of RvE1 on cardiac function recovery after MI in mice. EXPERIMENTAL APPROACH: Acute MI was induced by surgical ligation of the left anterior descending artery (LAD) in mice...
September 19, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28920097/acute-cd47-blockade-during-ischemic-myocardial-reperfusion-enhances-phagocytosis-associated-cardiac-repair
#2
Shuang Zhang, Xin-Yi Yeap, Matthew DeBerge, Nivedita K Naresh, Kevin Wang, Zhengxin Jiang, Jane E Wilcox, Steven M White, John P Morrow, Paul W Burridge, Daniel Procissi, Evan A Scott, William Frazier, Edward B Thorp
Our data suggest that, after a myocardial infarction, integrin-associated protein CD47 on cardiac myocytes is elevated. In culture, increased CD47 on the surface of dying cardiomyocytes impairs phagocytic removal by immune cell macrophages. After myocardial ischemia and reperfusion, acute CD47 inhibition with blocking antibodies enhanced dead myocyte clearance by cardiac phagocytes and also improved the resolution of cardiac inflammation, reduced infarct size, and preserved cardiac contractile function. Early targeting of CD47 in the myocardium after reperfusion may be a new strategy to enhance wound repair in the ischemic heart...
August 2017: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/28913572/establishment-of-s100a8-transgenic-rats-to-understand-innate-property-of-s100a8-and-its-immunological-role
#3
Kohki Okada, Hiroshi Itoh, Yasuhiko Kamikubo, Souichi Adachi, Masaki Ikemoto
The innate properties of S100A8 as a regulator in acute inflammation have not yet been elucidated in detail. Our aims are to newly establish S100A8 transgenic rats (Tg-S100A8) and to elucidate the immunological functions of S100A8. Following the treatment with 5% dextran sulfate sodium for 1 week, the body weight in Tg-S100A8 weakly decreased after the start; however, that in Japanese Wistar rats (WT) significantly decreased in the end. The serum level of CRP in Tg-S100A8 was significantly lower than that in WT, although the concentration of CRP apparently increased in both Tg-S100A8 and WT...
September 14, 2017: Inflammation
https://www.readbyqxmd.com/read/28911177/deoxycorticosterone-salt-mediated-cardiac-inflammation-and-fibrosis-are-dependent-on-functional-clock-signaling-in-male-mice
#4
Elizabeth K Fletcher, James Morgan, David R Kennaway, Laura A Bienvenu, Amanda J Rickard, Lea M D Delbridge, Peter J Fuller, Colin D Clyne, Morag J Young
Activation of the mineralocorticoid receptor (MR) promotes inflammation, fibrosis, and hypertension. Clinical and experimental studies show that MR antagonists have significant therapeutic benefit for all-cause heart failure; however, blockade of renal MRs limits their widespread use. Identification of key downstream signaling mechanisms for the MR in the cardiovascular system may enable development of targeted MR antagonists with selectivity for pathological MR signaling and lower impact on physiological renal electrolyte handling...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28901019/isolation-and-characterization-of-pathogenic-vibrio-alginolyticus-from-sea-cage-cultured-cobia-rachycentron-canadum-linnaeus-1766-%C3%A2-in-india
#5
P Rameshkumar, A K A Nazar, M A Pradeep, C Kalidas, R Jayakumar, G Tamilmani, M Sakthivel, A K Samal, S Sirajudeen, V Venkatesan, B M Nazeera
Mass mortalities of cobia Rachycentron canadum sub-adults occurred during August 2013 in cage culture at the Gulf of Mannar, Mandapam Tamil Nadu, India. The epizootic of disease was started with typical classical clinical signs followed by the acute mortality. Grossly, severe haemorrhage and congestion was observed in the gastric mucosa. Abdomen was distended with peritoneal fluid. Heart revealed haemopericardium and fibrinous pericardium. Histologically, the gastric mucosa showed severe erosion and necrosis...
September 12, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28877089/the-maturation-of-a-neural-hematopoietic-inflammatory-axis-in-cardiovascular-disease
#6
Lotte C A Stiekema, Johan G Schnitzler, Matthias Nahrendorf, Erik S G Stroes
PURPOSE OF REVIEW: Atherogenesis is the result of a complex interplay between lipids and innate immune cells, which are descendants of upstream progenitors residing in hematopoietic organs. In this review, we will discuss recent advances in the connection between hematopoiesis and atherogenesis. RECENT FINDINGS: The relevance of a neural-hematopoietic axis was recently supported by the demonstration of a correlation between metabolic activity in the amygdala and the bone marrow...
September 4, 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28871936/xanthoma-like-skin-changes-in-an-elderly-woman-with-a-normal-lipid-profile
#7
Piotr Nockowski, Zdzisław Woźniak, Adam Reich, Joanna Maj
Dear Editor, An 83-year-old woman developed yellow-brownish infiltrates, nodules, and tumors mimicking xanthomas, mostly involving the periorbital and chest area within three months (Figure 1). She had no abnormalities in serum cholesterol or triglycerides levels. A detailed laboratory analysis revealed the presence of mild monoclonal gammopathy with a presence of immunoglobulin G (IgG) kappa light chains; however, according to hematologist consultation, it did not require medical intervention. Imaging assessment and ultrasound examination did not show any specific involvement of internal organs...
July 2017: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28862949/high-perforin-positive-cardiac-cell-infiltration-and-male-sex-predict-adverse-long-term-mortality-in-patients-with-inflammatory-cardiomyopathy
#8
Felicitas Escher, Uwe Kühl, Dirk Lassner, Andrea Stroux, Ulrich Gross, Dirk Westermann, Burkert Pieske, Wolfgang Poller, Heinz-Peter Schultheiss
BACKGROUND: The authors analyzed the effects of perforin-dependent infiltration on long-term mortality in patients with inflammatory cardiomyopathy (CMi). We previously demonstrated that left ventricular function deteriorates and progresses to substantial cardiac dysfunction in patients with perforin-positive cardiac cell infiltration. METHODS AND RESULTS: Between 2003 and 2013, 2389 consecutive patients with clinically suspected CMi who underwent endomyocardial biopsies were enrolled...
August 18, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28858401/histopathology-of-middle-east-respiratory-syndrome-coronovirus-mers-cov-infection-clinicopathological-and-ultrastructural-study
#9
Khaled O Alsaad, Ali H Hajeer, Mohammed Al Balwi, Mohammed Al Moaiqel, Nourah Al Oudah, Abdulaziz Al Ajlan, Sameera AlJohani, Sami Alsolamy, Giamal E Gmati, Hanan Balkhy, Hamdan H Al-Jahdali, Salim A Baharoon, Yaseen M Arabi
AIMS: The pathogenesis, viral localization and histopathological features of Middle East Respiratory Syndrome - Coronavirus (MERS-CoV) in human are not sufficiently described. The aims of this study were to explore and define the spectrum of histological and ultrastructural pathological changes affecting various organs in a patient with MERS-CoV infection and represent a base of MERS-CoV histopathology. METHODS AND RESULTS: We analyzed the postmortem histopathological findings and investigated viral particles localization in the pulmonary and extra-pulmonary tissue by transmission electron microscopic examination in a 33-year-old male patient of T-cell lymphoma, who acquired MERS-CoV infection...
August 31, 2017: Histopathology
https://www.readbyqxmd.com/read/28857429/tenascin-c-renders-a-proangiogenic-phenotype-in-macrophage-via-annexin-ii
#10
Zhiyang Wang, Qi Wei, Liang Han, Keqing Cao, Tianfeng Lan, Zhenjie Xu, Yingjuan Wang, Yuan Gao, Jing Xue, Fei Shan, Jun Feng, Xin Xie
Tenascin-c is an extracellular matrix glycoprotein, the expression of which relates to the progression of atherosclerosis, myocardial infarction and heart failure. Annexin II acts as a cell surface receptor of tenascin-c. This study aimed to delineate the role of tenascin-c and annexin II in macrophages presented in atherosclerotic plaque. Animal models with atherosclerotic lesions were established using ApoE-KO mice fed with high-cholesterol diet. The expression of tenascin-c and annexin II in atherosclerotic lesions was determined by qRT-PCR, Western blot and immunohistochemistry analysis...
August 30, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28855632/resolution-agonist-15-epi-lipoxin-a4-programs-early-activation-of-resolving-phase-in-post-myocardial-infarction-healing
#11
Vasundhara Kain, Fei Liu, Veronika Kozlovskaya, Kevin A Ingle, Subhashini Bolisetty, Anupam Agarwal, Santosh Khedkar, Sumanth D Prabhu, Eugenia Kharlampieva, Ganesh V Halade
Following myocardial infarction (MI), overactive inflammation remodels the left ventricle (LV) leading to heart failure coinciding with reduced levels of 15-epi-Lipoxin A4 (15-epi LXA4). However, the role of 15-epi LXA4 in post-MI acute inflammatory response and resolving phase is unclear. We hypothesize that liposomal fusion of 15-epi-LXA4 (Lipo-15-epi-LXA4) or free 15-epi-LXA4 will expedite the resolving phase in post-MI inflammation. 8 to 12-week-old male C57BL/6 mice were subjected to permanent coronary artery ligation...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28851937/serelaxin-improves-cardiac-and-renal-function-in-doca-salt-hypertensive-rats
#12
Dong Wang, Yuhuan Luo, Komuraiah Myakala, David J Orlicky, Evgenia Dobrinskikh, Xiaoxin Wang, Moshe Levi
Serelaxin, a recombinant form of the naturally occurring peptide hormone relaxin-2, is a pleiotropic vasodilating hormone that has been studied in patients with acute heart failure. In this study, the effects of serelaxin on cardiac and renal function, fibrosis, inflammation and lipid accumulation were studied in DOCA-salt treated rats. Uninephrectomized rats were assigned to two groups: controls provided with normal drinking water and DOCA provided with DOCA pellets and sodium chloride drinking water. After 4 weeks, the DOCA-salt rats were randomly selected and implanted with osmotic minipumps delivering vehicle or serelaxin for another 4 weeks...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28851810/mertk-cleavage-on-resident-cardiac-macrophages-compromises-repair-after-myocardial-ischemia-reperfusion-injury
#13
Matthew DeBerge, Xin-Yi Yeap, Shirley Dehn, Shuang Zhang, Lubov S Grigoryeva, Sol Misener, Daniele Procissi, Xin Zhou, Daniel C Lee, William A Muller, Xunrong Luo, Carla Rothlin, Ira Tabas, Edward B Thorp
Rationale: Clinical benefits of reperfusion after myocardial infarction (MI) are offset by maladaptive innate immune cell function and therapeutic interventions are lacking. Objective: We sought to test the significance of phagocytic clearance by resident and recruited phagocytes after myocardial ischemia reperfusion (I/R). Methods and Results: In humans, we discovered that clinical reperfusion after MI led to significant elevation of the soluble form of MerTK (i.e. solMER), a critical biomarker of compromised phagocytosis by innate macrophages...
August 29, 2017: Circulation Research
https://www.readbyqxmd.com/read/28842629/bone-marrow-derived-cells-and-their-conditioned-medium-induce-microvascular-repair-in-uremic-rats-by-stimulation-of-endogenous-repair-mechanisms
#14
Lina Golle, Hans U Gerth, Katrin Beul, Barbara Heitplatz, Peter Barth, Manfred Fobker, Hermann Pavenstädt, Giovana S Di Marco, Marcus Brand
The reduced number of circulating stem/progenitor cells that is found in chronic kidney disease (CKD) patients may contribute to impaired angiogenic repair and decreased capillary density in the heart. Cell therapy with bone marrow-derived cells (BMDCs) has been shown to induce positive effects on the microvasculature and cardiac function, most likely due to secretion of growth factors and cytokines, all of which are present in the conditioned medium (CM); however, this is controversial. Here we showed that treatment with BMDC or CM restored vascular density and decreased the extent of fibrosis in a rat model of CKD, the 5/6 nephrectomy...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28835616/leukocytic-toll-like-receptor-2-deficiency-preserves-cardiac-function-and-reduces-fibrosis-in-sustained-pressure-overload
#15
Jiong-Wei Wang, Magda S C Fontes, Xiaoyuan Wang, Suet Yen Chong, Elise L Kessler, Ya-Nan Zhang, Judith J de Haan, Fatih Arslan, Saskia C A de Jager, Leo Timmers, Toon A B van Veen, Carolyn S P Lam, Dominique P V de Kleijn
An involement of Toll-like receptor 2 (TLR2) has been established in cardiac dysfunction after acute myocardial infarction; however, its role in chronic pressure overload is unclear. We sought to evaluate the role of TLR2 in cardiac hypertrophy, fibrosis and dysfunction in sustained pressure overload. We induced pressure overload via transverse aortic constriction (TAC) in TLR2(-/-) and wild type (WT) mice, and followed temporal changes over 8 weeks. Despite similar increases in heart weight, left ventricular (LV) ejection fraction (EF) and diastolic function (mitral E/A ratio) were preserved in TLR2(-/-) mice but impaired in WT mice following TAC...
August 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28832763/methotrexate-associated-to-lipid-core-nanoparticles-improves-cardiac-allograft-vasculopathy-and-the-inflammatory-profile-in-a-rabbit-heart-graft-model
#16
A I Fiorelli, D D Lourenço-Filho, E R Tavares, P O Carvalho, A F Marques, P S Gutierrez, R C Maranhão, N A G Stolf
Coronary allograft vasculopathy is an inflammatory-proliferative process that compromises the long-term success of heart transplantation and has no effective treatment. A lipid nanoemulsion (LDE) can carry chemotherapeutic agents in the circulation and concentrates them in the heart graft. The aim of the study was to investigate the effects of methotrexate (MTX) associated to LDE. Rabbits fed a 0.5% cholesterol diet and submitted to heterotopic heart transplantation were treated with cyclosporine A (10 mg·kg-1·day-1 orally) and allocated to treatment with intravenous LDE-MTX (4 mg/kg, weekly, n=10) or with weekly intravenous saline solution (control group, n=10), beginning on the day of surgery...
August 17, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28826664/aicar-treatment-reduces-interstitial-fibrosis-in-aging-mice-suppression-of-the-inflammatory-fibroblast
#17
Katarzyna A Cieslik, JoAnn Trial, Mark L Entman
In 2030, elderly people will represent 20% of the United States population. Even now, chronic cardiac diseases, especially heart failure with preserved systolic function (HFpEF), are the most expensive DRGs for Medicare. Progressive interstitial fibrosis in the aging heart is well recognized as an important component of HFpEF. Our recent studies suggested an important pathophysiologic role for reduced TGF-β receptor 1 (TGFβR1) signaling in mesenchymal stem cells (MSCs) and their mesenchymal fibroblast progeny in the development of interstitial fibrosis...
October 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28822966/inhibitory-actions-of-the-nrg-1-erbb4-pathway-in-macrophages-during-tissue-fibrosis-in-heart-skin-and-lung
#18
Zarha Vermeulen, Anne-Sophie Hervent, Lindsey Dugaucquier, Leni Vandekerckhove, Miche Rombouts, Matthias Beyens, Dorien M Schrijvers, Guido R Y De Meyer, Stuart Maudsley, Gilles W De Keulenaer, Vincent Fm Segers
The neuregulin-1 (NRG-1)/ErbB system is an endothelium-controlled paracrine system modulating cardiac performance and adaptation. Recent studies indicate that NRG-1 has anti-fibrotic effects in the left ventricle (LV), which were explained by direct actions on cardiac fibroblasts. However, the NRG-1/ErbB system also regulates the function of macrophages. In this study, we hypothesized that the anti-fibrotic effect of NRG-1 in the heart is at least partially mediated through inhibitory effects on macrophages...
August 19, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28821329/cardiac-progenitor-cell-recruitment-drives-fetal-cardiac-regeneration-by-enhanced-angiogenesis
#19
Carlos Zgheib, Maggie M Hodges, Myron W Allukian, Junwang Xu, Kara L Spiller, Joseph H Gorman, Robert C Gorman, Kenneth W Liechty
BACKGROUND: In contrast to adults, the fetal response to myocardial infarction (MI) is regenerative, requiring the recruitment of cardiac progenitor cells to replace infarcted myocardium. Macrophage contribution to tissue repair depends on their phenotype: M1 are proinflammatory and initiate angiogenesis; M2a are profibrotic and contribute to blood vessels maturation; and M2c are proremodeling and proangiogenesis. The goal of the present study was to expand on this work by examining cardiac progenitor cells recruitment, and the role of macrophages in promoting angiogenesis and cardiac regeneration in the fetal heart after MI...
August 16, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28820283/n-3-pufas-induce-inflammatory-tolerance-by-formation-of-keap1-containing-sqstm1-p62-bodies-and-activation-of-nfe2l2
#20
Jennifer Mildenberger, Ida Johansson, Ismail Sergin, Eli Kjøbli, Jan Kristian Damås, Babak Razani, Trude Helen Flo, Geir Bjørkøy
Inflammation is crucial in the defense against infections but must be tightly controlled to limit detrimental hyperactivation. Our diet influences inflammatory processes and omega-3 polyunsaturated fatty acids (n-3 PUFAs) have known anti-inflammatory effects. The balance of pro- and anti-inflammatory processes is coordinated by macrophages and macroautophagy/autophagy has recently emerged as a cellular process that dampens inflammation. Here we report that the n-3 PUFA docosahexaenoic acid (DHA) transiently induces cytosolic speckles of the autophagic receptor SQSTM1/p62 (sequestosome 1) (described as SQSTM1/p62-bodies) in macrophages...
August 18, 2017: Autophagy
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