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Myofibroblast

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https://www.readbyqxmd.com/read/28427343/loss-of-pericyte-smoothened-activity-in-mice-with-genetic-deficiency-of-leptin
#1
Guanhua Xie, Marzena Swiderska-Syn, Mark L Jewell, Mariana Verdelho Machado, Gregory A Michelotti, Richard T Premont, Anna Mae Diehl
BACKGROUND: Obesity is associated with multiple diseases, but it is unclear how obesity promotes progressive tissue damage. Recovery from injury requires repair, an energy-expensive process that is coupled to energy availability at the cellular level. The satiety factor, leptin, is a key component of the sensor that matches cellular energy utilization to available energy supplies. Leptin deficiency signals energy depletion, whereas activating the Hedgehog pathway drives energy-consuming activities...
April 20, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28426899/ultrasonographic-features-of-intravascular-fasciitis-case-report-and-review-of-the-literature
#2
K Takahashi, T Yanagi, K Imafuku, S Kitamura, Y Inamura-Takashima, Y Yamaguchi, H Hata, H Shimizu
Intravascular fasciitis (IF), a variant of nodular fasciitis (NF), is a reactive intravascular proliferation of myofibroblasts. IF is an indolent subcutaneous or intramuscular nodule that is most commonly found on the extremities, head and neck.(1, 2) This article is protected by copyright. All rights reserved.
April 20, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28424623/notch-signaling-in-ischemic-damage-and-fibrosis-evidence-and-clues-from-the-heart
#3
REVIEW
Silvia Nistri, Chiara Sassoli, Daniele Bani
Notch signaling is a major intercellular coordination mechanism highly conserved throughout evolution. In vertebrates, Notch signaling is physiologically involved in embryo development, including mesenchymal cell commitment, formation of heart tissues and angiogenesis. In post-natal life, Notch signaling is maintained as a key mechanism of cell-cell communication and its dysregulations have been found in pathological conditions such as ischemic and fibrotic diseases. In the heart, Notch takes part in the protective response to ischemia, being involved in pre- and post-conditioning, reduction of reperfusion-induced oxidative stress and myocardial damage, and cardiomyogenesis...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28422762/silencing-smoc2-ameliorates-kidney-fibrosis-by-inhibiting-fibroblast-to-myofibroblast-transformation
#4
Casimiro Gerarduzzi, Ramya K Kumar, Priyanka Trivedi, Amrendra K Ajay, Ashwin Iyer, Sarah Boswell, John N Hutchinson, Sushrut S Waikar, Vishal S Vaidya
Secreted modular calcium-binding protein 2 (SMOC2) belongs to the secreted protein acidic and rich in cysteine (SPARC) family of matricellular proteins whose members are known to modulate cell-matrix interactions. We report that SMOC2 is upregulated in the kidney tubular epithelial cells of mice and humans following fibrosis. Using genetically manipulated mice with SMOC2 overexpression or knockdown, we show that SMOC2 is critically involved in the progression of kidney fibrosis. Mechanistically, we found that SMOC2 activates a fibroblast-to-myofibroblast transition (FMT) to stimulate stress fiber formation, proliferation, migration, and extracellular matrix production...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28421197/ginsenoside-rg1-ameliorates-cigarette-smoke-induced-airway-fibrosis-by-suppressing-the-tgf-%C3%AE-1-smad-pathway-in-vivo-and-in-vitro
#5
Sibin Guan, Qian Liu, Fengfeng Han, Wen Gu, Lin Song, Yue Zhang, Xuejun Guo, Weiguo Xu
Small airway fibrosis is a key pathological process accompanying chronic obstructive pulmonary disease (COPD) and includes fibroblast/myofibroblast transdifferentiation and excessive extracellular matrix deposition. Ginsenoside Rg1, one of the main active ingredients of Panax ginseng, has been shown to exert an antifibrotic effect in many tissues. However, little is known about the underlying mechanism and whether ginsenoside Rg1 can exert an effect on small airway fibrosis. We investigated the anti-small airway fibrosis effects of ginsenoside Rg1 in human embryonic lung fibroblasts and in COPD rats...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28421003/acellular-gelatinous-material-of-human-umbilical-cord-enhances-wound-healing-a-candidate-remedy-for-deficient-wound-healing
#6
Nazihah Bakhtyar, Marc G Jeschke, Laurence Mainville, Elaine Herer, Saeid Amini-Nik
Impaired wound healing is a severe clinical challenge and research into finding effective wound healing strategies is underway as there is no ideal treatment. Gelatinous material from the umbilical cord called Wharton's jelly is a valuable source of mesenchymal stem cells which have been shown to aid wound healing. While the cellular component of Wharton's jelly has been the subject of extensive research during the last few years, little is known about the de-cellularized jelly material of the umbilical cord...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28420408/sialylation-regulates-myofibroblast-differentiation-of-human-skin-fibroblasts
#7
Norihiko Sasaki, Yoko Itakura, Masashi Toyoda
BACKGROUND: Fibroblasts are key players in maintaining skin homeostasis and in orchestrating physiological tissue repair and skin regeneration. Dysfunctions in fibroblasts that occur with aging and the senescent process lead to the delayed healing observed in elderly people. The molecular mechanisms leading to fibroblast dysfunction during aging and the senescent process have not yet been clarified. Previously, changes in patterns of glycosylation were observed in fibroblasts in aging and the senescent process, but the effect of these changes on the function of fibroblasts has not been well documented...
April 18, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28420366/pirfenidone-attenuates-bleomycin-induced-pulmonary-fibrosis-in-mice-by-regulating-nrf2-bach1-equilibrium
#8
Yuan Liu, Fuai Lu, Lirong Kang, Zhihua Wang, Yongfu Wang
BACKGROUND: Oxidative stress is one of the important factors involved in the pathogenesis of idiopathic pulmonary fibrosis (IPF). The equilibrium of Nuclear factor-erythroid-related factor 2 (Nrf2)/[BTB (broad-complex, tramtrack and bric-a-brac) and CNC (cap'n'collar protein) homology 1, Bach1] determines the expression level of antioxidant factors, further regulating the function of oxidation/antioxidation capacity. Pirfenidone (PFD) is one of two currently for IPF therapy approved drugs...
April 18, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28418499/sphingosine-1-phosphate-s1p-related-response-of-human-conjunctival-fibroblasts-after-filtration-surgery-for-glaucoma
#9
Yuka Aoyama-Araki, Megumi Honjo, Takatoshi Uchida, Reiko Yamagishi, Kuniyuki Kano, Junken Aoki, Makoto Aihara
Purpose: To investigate levels of sphingosine-1-phosphate (S1P) in aqueous fluid samples taken before and after filtration surgery and S1P-induced human conjunctival fibroblast (HCF) responses. Methods: Levels of S1P and its related sphingophospholipids in aqueous fluid obtained immediately before and after filtration surgery were determined by liquid chromatography-tandem mass spectrometry. HCFs were used for all in vitro experiments. The expression of five S1P receptor subtypes in HCFs was examined by quantitative real-time PCR...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28416697/small-molecule-mediated-inhibition-of-myofibroblast-transdifferentiation-for-the-treatment-of-fibrosis
#10
Michael J Bollong, Baiyuan Yang, Naja Vergani, Brittney A Beyer, Emily N Chin, Claudio Zambaldo, Danling Wang, Arnab K Chatterjee, Luke L Lairson, Peter G Schultz
Fibrosis, a disease in which excessive amounts of connective tissue accumulate in response to physical damage and/or inflammatory insult, affects nearly every tissue in the body and can progress to a state of organ malfunction and death. A hallmark of fibrotic disease is the excessive accumulation of extracellular matrix-secreting activated myofibroblasts (MFBs) in place of functional parenchymal cells. As such, the identification of agents that selectively inhibit the transdifferentiation process leading to the formation of MFBs represents an attractive approach for the treatment of diverse fibrosis-related diseases...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28415158/clinicopathological-study-of-18-cases-of-inflammatory-myofibroblastic-tumors-with-reference-to-alk-1-expression-5-year-experience-in-a-tertiary-care-center
#11
Ramesh Babu Telugu, Anne Jennifer Prabhu, Nobin Babu Kalappurayil, John Mathai, Birla Roy Gnanamuthu, Marie Therese Manipadam
Background: Inflammatory myofibroblastic tumor is a histopathologically distinctive neoplasm of children and young adults. According to World Health Organization (WHO) classification, inflammatory myofibroblastic tumor is an intermediate-grade tumor, with potential for recurrence and rare metastasis. There are no definite histopathologic, molecular or cytogenetic features to predict malignant transformation, recurrence or metastasis. Materials and Methods: A 5-year retrospective study of histopathologically diagnosed inflammatory myofibroblastic tumors of various anatomic sites was conducted to correlate anaplastic lymphoma kinase-1 (ALK-1) expression with histological atypia, multicentric origin of tumor, recurrence and metastasis...
April 17, 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28413672/whole-body-magnetic-resonance-imaging-in-the-diagnosis-and-follow-up-of-multicentric-infantile-myofibromatosis-a-case-report
#12
Sergio Salerno, Maria Chiara Terranova, Mario Rossello, Maria Piccione, Ottavio Ziino, Giuseppe Lo Re
Myofibromatosis is an uncommon disorder of infancy, characterized by proliferation of myofibroblasts in solitary or multiple nodules. The clinical characteristics depend on the involved sites: Myofibromatosis may develop as a musculoskeletal form, with non-painful swellings and eventual mass effect symptoms, or as a generalized form with visceral involvement and organ failure. Prognosis and therapy vary between the abovementioned patterns. When there is no visceral involvement, the tumors may regress spontaneously; however, the visceral form may represent a lifethreatening condition with poor outcome and it requires aggressive management...
April 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28409351/inflammation-and-fibrosis-in-polycystic-kidney-disease
#13
Cheng Jack Song, Kurt A Zimmerman, Scott J Henke, Bradley K Yoder
Polycystic kidney disease (PKD) is a commonly inherited disorder characterized by cyst formation and fibrosis (Wilson, N Engl J Med 350:151-164, 2004) and is caused by mutations in cilia or cilia-related proteins, such as polycystin 1 or 2 (Oh and Katsanis, Development 139:443-448, 2012; Kotsis et al., Nephrol Dial Transplant 28:518-526, 2013). A major pathological feature of PKD is the development of interstitial inflammation and fibrosis with an associated accumulation of inflammatory cells (Grantham, N Engl J Med 359:1477-1485, 2008; Zeier et al...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/28409069/efficiency-of-crizotinib-on-an-alk-positive-inflammatory-myofibroblastic-tumor-of-the-central-nervous-system-a-case-report
#14
Anas Chennouf, Elizabeth Arslanian, David Roberge, France Berthelet, Michel Bojanowski, Jean-Paul Bahary, Laura Masucci, Karl Belanger, Marie Florescu, Philip Wong
Inflammatory myofibroblastic tumors (IMT) of the central nervous system (CNS) are rare entities that have a predilection for local recurrences. Approximately half of the inflammatory myofibroblastic tumors contain translocations that result in the over-expression of the anaplastic lymphoma kinase (ALK) gene. We hereby present the case of a patient diagnosed with a left parieto-occipital IMT that recurred after multiple surgeries and radiotherapy. Immuno-histochemical examination of the tumor demonstrated ALK overexpression and the presence of an ALK rearrangement observed in lung cancers...
March 2, 2017: Curēus
https://www.readbyqxmd.com/read/28408888/prevention-of-bleomycin-induced-pulmonary-inflammation-and-fibrosis-in-mice-by-paeonol
#15
Meng-Han Liu, An-Hsuan Lin, Hsin-Kuo Ko, Diahn-Warng Perng, Tzong-Shyuan Lee, Yu Ru Kou
Pulmonary fibrosis is a severe and progressive disease that is characterized by an abnormal deposition of extracellular matrix, such as collagens. The pathogenesis of this disease may be initiated by oxidative damage of lung epithelial cells by fibrogenic stimuli, leading to lung inflammation, which in turn promotes various lung fibrotic responses. The profibrogenic effect of transforming growth factor-β1 (TGF-β1) on lung fibroblasts is crucial for the pathogenesis of this disease. Paeonol, the main phenolic compound present in the Chinese herb Paeonia suffruticosa, has antioxidant and anti-inflammatory properties...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28408205/temporal-spatial-and-phenotypical-changes-of-pdgfr%C3%AE-expressing-fibroblasts-during-late-lung-development
#16
Mehari Endale, Shawn Ahlfeld, Erik Bao, Xiaoting Chen, Jenna Green, Zach Bess, Matthew T Weirauch, Yan Xu, Anne Karina Perl
Many studies have investigated the source and role of epithelial progenitors during lung development; such information is limited for fibroblast populations and their complex role in the developing lung. In this study, we characterized the spatial location, mRNA expression and Immunophenotyping of PDGFRα(+) fibroblasts during sacculation and alveolarization. Confocal microscopy identified spatial association of PDGFRα expressing fibroblasts with proximal epithelial cells of the branching bronchioles and the dilating acinar tubules at E16...
April 11, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28407433/spatiotemporal-evolution-of-the-wound-repairing-process-in-a-3d-human-dermis-equivalent
#17
Bernadette Lombardi, Costantino Casale, Giorgia Imparato, Francesco Urciuolo, Paolo Antonio Netti
Several skin equivalent models have been developed to investigate in vitro the re-epithelialization process occurring during wound healing. Although these models recapitulate closure dynamics of epithelial cells, they fail to capture how a wounded connective tissue rebuilds its 3D architecture until the evolution in a scar. Here, the in vitro tissue repair dynamics of a connective tissue is replicated by using a 3D human dermis equivalent (3D-HDE) model composed of fibroblasts embedded in their own extracellular matrix (ECM)...
April 13, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28404615/myeloperoxidase-mediates-postischemic-arrhythmogenic-ventricular-remodeling
#18
Martin Mollenhauer, Kai Friedrichs, Max Lange, Jan Gesenberg, Lisa Remane, Christina Kerkenpaß, Jenny Krause, Johanna Schneider, Thorben Ravekes, Martina Maass, Marcel Halbach, Gabriel Peinkofer, Tomo Saric, Dennis Mehrkens, Matti Adam, Florian G Deuschl, Denise Lau, Birgit Geertz, Kashish Manchanda, Thomas Eschenhagen, Lukas Kubala, Tanja K Rudolph, Yuping Wu, Wh W Tang, Stanley L Hazen, Stephan Baldus, Anna Klinke, Volker Rudolph
Rationale: Ventricular arrhythmias remain the leading cause of death in patients suffering myocardial ischemia. Myeloperoxidase (MPO), a heme-enzyme released by polymorphonuclear neutrophils, accumulates within ischemic myocardium and has been linked to adverse left ventricular remodeling. Objective: To reveal the role of MPO for the development of ventricular arrhythmias. Methods and Results: In different murine models of myocardial ischemia MPO deficiency profoundly decreased vulnerability for ventricular tachycardia (VT) upon programmed right ventricular and burst stimulation and spontaneously as assessed by ECG telemetry following isoproterenol injection...
April 12, 2017: Circulation Research
https://www.readbyqxmd.com/read/28397850/interaction-of-src-and-alpha-v-integrin-regulates-fibroblast-migration-and-modulates-lung-fibrosis-in-a-preclinical-model-of-lung-fibrosis
#19
Yin-Ying Lu, Xue-Ke Zhao, Lei Yu, Fei Qi, Bing Zhai, Chang-Qing Gao, Qiang Ding
Src kinase is known to regulate fibroblast migration. However, the contribution of integrin and Src kinase interaction to lung fibrosis has not been mechanistically investigated. Our data demonstrate that integrin alpha v (αV) recruited Src kinase and that leads to subsequent Src activation in fibroblasts plated on fibrotic matrix, osteopontin. Src interaction with integrin αV is required for integrin αV-mediated Src activation, and the subsequent fibroblast migration. The study identified that β5 and β3 are the major integrins for this effect on osteopontin...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28396722/laparoscopic-retrosternal-gastric-pull-up-for-fistulized-mediastinal-mass
#20
Benedetto Mungo, Arianna Barbetta, Anne O Lidor, Miloslawa Stem, Daniela Molena
We describe the case of a patient successfully reconstructed with laparoscopic retrosternal gastric pull-up after esophagectomy for unresectable posterior mediastinal inflammatory myofibroblastic tumor, eroding into the esophagus and compressing the airways. A partial esophagectomy with esophagostomy was performed for treatment of esophageal pleural fistula and empyema, while the airways were managed with the placement of an endobronchial stent. Gastrointestinal reconstruction was performed using a laparoscopic approach to create a retrosternal tunnel for gastric conduit pull-up and cervical anastomosis...
March 27, 2017: World Journal of Gastrointestinal Surgery
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