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https://www.readbyqxmd.com/read/28070997/involvement-of-endothelial-progenitor-cells-in-the-formation-of-plexiform-lesions-in-broiler-chickens-possible-role-of-local-immune-inflammatory-response
#1
Xun Tan, Fan-Guo Juan, Ali Q Shah
Plexiform lesions (PLs), which are often accompanied by perivascular infiltrates of mononuclear cells, represent the hallmark lesions of pulmonary arteries in humans suffering from severe pulmonary arterial hypertension (PAH). Endothelial progenitor cells (EPCs) have been recently implicated in the formation of PLs in human patients. PLs rarely develop in rodent animal models of PAH but can develop spontaneously in broiler chickens. The aim of the present study was to confirm the presence of EPCs in the PLs in broilers...
2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28050756/endothelial-cell-mediated-promotion-of-ciliated-cell-differentiation-of-human-airway-basal-cells-via-insulin-and-insulin-like-growth-factor-1-receptor-mediated-signaling
#2
Kazunori Gomi, Yongjiang Tang, Vanessa Arbelaez, Ronald G Crystal, Matthew S Walters
Human airway basal cells (BC) function as stem/progenitor cells of the human airway epithelium, capable of differentiating into ciliated and secretory cells during turnover and repair. The positioning of BC along the basement membrane allows for potential paracrine signaling from non-epithelial cells in the mesenchyme to regulate BC function. Based on the knowledge that interaction between the airway epithelium and mesenchyme is critical for proper maintenance of both tissues, and that endothelial cells (EC) can regulate multiple functions of BC, the present study was designed to help understand the role of BC and EC cross-talk in regulating BC stem/progenitor function...
January 3, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28005423/cellular-senescence-and-lung-function-during-aging-yin-and-yang
#3
Judith Campisi
Cellular senescence is a cell fate decision and stress response that entails a permanent arrest of cell proliferation coupled to a complex secretory phenotype. Senescent cells increase in number with age in most, if not all, mammalian tissues, including the airways and lungs. They also increase at greater than expected numbers, compared with age-matched controls, at sites of age-related pathologies such as chronic obstructive pulmonary disorder and emphysema. The senescence response is a double-edged sword...
December 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28004124/attenuation-of-neointimal-formation-with-netrin-1-and-netrin-1-preconditioned-endothelial-progenitor-cells
#4
Norika Mengchia Liu, Kin Lung Siu, Ji Youn Youn, Hua Cai
: Restenosis after angioplasty is a serious clinical problem that can result in re-occlusion of the coronary artery. Although current drug-eluting stents have proved to be more effective in reducing restenosis, they have drawbacks of inhibiting reendothelialization to promote thrombosis. New treatment options are in urgent need. We have shown that netrin-1, an axon-guiding protein, promotes angiogenesis and cardioprotection via production of nitric oxide (NO). The present study examined whether and how netrin-1 attenuates neointimal formation in a femoral wire injury model...
December 21, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27997009/-genomics-of-lung-adenocarcinoma-pathogenetic-significance-and-clinical-applications
#5
Raffaele Palmirotta, Silvana Acquafredda, Antonella Argentiero, Claudia Carella, Laura Lanotte, Nicla Pappagallo, Davide Quaresmini, Franco Silvestris
Diagnostic and therapeutic approaches to non small cell lung cancer (NSCLC), especially adenocarcinoma, have recently undergone dramatic evolution according to the tremendous amount of molecular data collected on this cancer. In fact, the application of oncogenomics has identified novel molecular subtypes of NSCLC and led the way to diagnostic criteria based on the expression of specific genetic alterations that can provide prognostic and specific indications to the molecular targeted therapies. In NSCLC, several genes show "driver" molecular alterations that confer oncogenic potential to progenitor cells through the enrollment of metabolic pathways critical for cell proliferation and tumor development...
December 2016: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/27967234/alternative-progenitor-lineages-regenerate-the-adult-lung-depleted-of-type-ii-cells
#6
Min Yee, William Domm, Robert Gelein, Karen L de Mesy Bentley, R Matthew Kottmann, Patricia J Sime, B Paige Lawrence, Michael A O'Reilly
An aberrant oxygen environment at birth increases the severity of respiratory viral infections later in life through poorly understood mechanisms. Here we show that alveolar epithelial type II (AEC2) cells, a progenitor for AEC1 cells are depleted in adult mice exposed to neonatal hypoxia or hyperoxia. Airway cells expressing SP-C and ABCA3, alveolar pod cells expressing KRT5, and pulmonary fibrosis was observed when these mice were infected with a sublethal dose of HKx31, H3N2 influenza A virus (IAV). This was not seen in infected siblings birthed into room air...
December 14, 2016: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/27959618/mechanisms-of-organ-injury-and-repair-by-macrophages
#7
Kevin M Vannella, Thomas A Wynn
Macrophages regulate tissue regeneration following injury. They can worsen tissue injury by producing reactive oxygen species and other toxic mediators that disrupt cell metabolism, induce apoptosis, and exacerbate ischemic injury. However, they also produce a variety of growth factors, such as IGF-1, VEGF-α, TGF-β, and Wnt proteins that regulate epithelial and endothelial cell proliferation, myofibroblast activation, stem and tissue progenitor cell differentiation, and angiogenesis. Proresolving macrophages in turn restore tissue homeostasis by functioning as anti-inflammatory cells, and macrophage-derived matrix metalloproteinases regulate fibrin and collagen turnover...
December 7, 2016: Annual Review of Physiology
https://www.readbyqxmd.com/read/27957616/developmental-pathways-in-lung-regeneration
#8
REVIEW
Collin T Stabler, Edward E Morrisey
The key processes of lung development have been elucidated in the past several decades, helping to identify and characterize the resident progenitor cells that ultimately generate the mature organ. The adult lung is a complex organ consisting in scores of different cell lineages that are remarkably quiescent in the absence of injury. Despite low cellular turnover, the lung can respond quickly and dramatically to acute damage, with spatially restricted stem and progenitor cells re-entering the cell cycle and differentiating to promote repair...
December 13, 2016: Cell and Tissue Research
https://www.readbyqxmd.com/read/27941755/fibroblastic-foci-covered-with-alveolar-epithelia-exhibiting-epithelial-mesenchymal-transition-destroy-alveolar-septa-by-disrupting-blood-flow-in-idiopathic-pulmonary-fibrosis
#9
Miki Yamaguchi, Sachie Hirai, Yusuke Tanaka, Toshiyuki Sumi, Masahiro Miyajima, Taijiro Mishina, Gen Yamada, Mitsuo Otsuka, Tadashi Hasegawa, Takashi Kojima, Toshiro Niki, Atsushi Watanabe, Hiroki Takahashi, Yuji Sakuma
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive interstitial lung disease of unknown cause. IPF has a distinct histopathological pattern of usual interstitial pneumonia in which fibroblastic foci (FF) represent the leading edge of fibrotic destruction of the lung. Currently there are three major hypotheses for how FF are generated: (1) from resident fibroblasts, (2) from bone marrow-derived progenitors of fibroblasts, and (3) from alveolar epithelial cells that have undergone epithelial-mesenchymal transition (EMT)...
December 12, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27923370/the-cellular-kinetics-of-lung-alveolar-epithelial-cells-and-its-relationship-with-lung-tissue-repair-after-acute-lung-injury
#10
Ling Zeng, Xue-Tao Yang, Hai-Sheng Li, Yong Li, Ce Yang, Wei Gu, Yin-Han Zhou, Juan Du, Hai-Yan Wang, Jian-Hui Sun, Da-Lin Wen, Jian-Xin Jiang
BACKGROUND: Organ regeneration in mammals is hypothesized to require a functional pool of stem or progenitor cells, but the role of these cells in lung regeneration is unknown. METHODS: Based on the fact that postnatal regeneration of alveolar tissue has been attributed to alveolar epithelial cells, we established a hemorrhagic shock and Lipopolysaccharide (LPS) lung injury model. Using this model, we analyzed the cellular kinetics of lung alveolar epithelial cells...
December 7, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27922848/lung-regeneration-steps-toward-clinical-implementation-and-use
#11
Elizabeth A Calle, Katherine L Leiby, MichaSam B Raredon, Laura E Niklason
PURPOSE OF REVIEW: Whole lung tissue engineering is a relatively new area of investigation. In a short time, however, the field has advanced quickly beyond proof of concept studies in rodents and now stands on the cusp of wide-spread scale up to large animal studies. Therefore, this technology is ever closer to being directly clinically relevant. RECENT FINDINGS: The main themes in the literature include refinement of the fundamental components of whole lung engineering and increasing effort to direct induced pluripotent stem cells and lung progenitor cells toward use in lung regeneration...
February 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/27900108/high-dose-chemotherapy-with-autologous-peripheral-blood-stem-cell-transplantation-for-choriocarcinoma-a-case-report-and-literature-review
#12
Eiko Yamamoto, Kaoru Niimi, Kayo Fujikake, Tetsuya Nishida, Makoto Murata, Ayako Mitsuma, Yuichi Ando, Fumitaka Kikkawa
Choriocarcinoma is a malignant gestational trophoblastic neoplasia (GTN) and one of the curable types of gynecological cancer. However, 10% of choriocarcinoma patients have a poor prognosis, particularly when they have metastasis, apart from pulmonary metastasis, or do not go into remission by the second chemotherapeutic regimen. We herein present the case of a 36-year-old patient who had choriocarcinoma with metastases to the lungs, liver and kidneys. The 5th and 6th regimens with cisplatin for choriocarcinoma failed and the patient developed brain metastases...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27899395/functional-definition-of-progenitors-versus-mature-endothelial-cells-reveals-key-soxf-dependent-differentiation-process
#13
Jatin Patel, Elke J Seppanen, Mathieu P Rodero, Ho Yi Wong, Prudence Donovan, Zoltan Neufeld, Nicholas M Fisk, Mathias François, Kiarash Khosrotehrani
BACKGROUND: -During adult life, blood vessel formation is thought to occur via angiogenic processes involving branching from existing vessels. An alternate proposal suggests that neo-vessels form from endothelial progenitors able to assemble the intimal layers. We here aimed to define vessel-resident endothelial progenitors in vivo in a variety of tissues in physiological and pathological situations such as normal aorta, lungs, as well as wound healing, tumors and placenta. METHODS: -Based on protein expression levels of common endothelial markers using flow cytometry, three sub-populations of endothelial cells could be identified among VE-Cadherin+ and CD45- cells...
November 29, 2016: Circulation
https://www.readbyqxmd.com/read/27894293/lung-bioengineering-physical-stimuli-and-stem-progenitor-cell-biology-interplay-towards-biofabricating-a-functional-organ
#14
REVIEW
Paula N Nonaka, Juan J Uriarte, Noelia Campillo, Vinicius R Oliveira, Daniel Navajas, Ramon Farré
A current approach to obtain bioengineered lungs as a future alternative for transplantation is based on seeding stem cells on decellularized lung scaffolds. A fundamental question to be solved in this approach is how to drive stem cell differentiation onto the different lung cell phenotypes. Whereas the use of soluble factors as agents to modulate the fate of stem cells was established from an early stage of the research with this type of cells, it took longer to recognize that the physical microenvironment locally sensed by stem cells (e...
November 28, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27887617/increased-expression-of-trop2-in-airway-basal-cells-potentially-contributes-to-airway-remodeling-in-chronic-obstructive-pulmonary-disease
#15
Qixiao Liu, Haijun Li, Qin Wang, Yuke Zhang, Wei Wang, Shuang Dou, Wei Xiao
BACKGROUND: The airway epithelium of chronic obstructive pulmonary disease (COPD) patients undergoes aberrant repair and remodeling after repetitive injury following exposure to environmental factors. Abnormal airway regeneration observed in COPD is thought to originate in the stem/progenitor cells of the airway epithelium, the basal cells (BCs). However, the molecular mechanisms underlying these changes remain unknown. Here, trophoblast cell surface antigen 2 (TROP2), a protein implicated in the regulation of stem cell activity, was examined in lung tissue samples from COPD patients...
November 25, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27878717/antitumor-effects-of-sorbus-aucuparia-l-extract-highly-saturated-with-anthocyans-and-their-mechanisms
#16
T G Razina, E P Zueva, A V Ulrich, O Yu Rybalkina, A V Chaikovskii, N V Isaikina, G I Kalinkina, V V Zhdanov, G N Zyuz'kov
The effects of Fructus Sorbi aucupariae extract, originally saturated with anthocyans, on the development of Lewis lung carcinoma and B-16 melanoma in C57Bl/6 mice and the efficiency of cyclophosphamide treatment were studied. Antitumor activity of the extract and potentiation of the antimetastatic activity of the cytostatic were demonstrated. Studies on melanoma B-16 model revealed an increase in the counts of stromal progenitor cells in the tumor node and their accelerated maturation after treatment with the extract...
November 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27866540/-the-study-of-the-eosinophil-cd34-progenitor-cells-differentiation-mechanism-of-model-rats-with-occupational-asthma-and-the-intervention-of-warm-and-tonifying-kidney-yang-decoction
#17
Z Y Hu, Y M Jia, S J Wang, J Y Han, T Yu
Objective: To investigate the mechanism of CD34(+) progenitor cell differentiation in rat by observing the change relations between the eosinophils (EOS) and the content of Eotaxin and IL-5 in blood and the CD34(+)/CCR3(+), CD34(+)/IL-5Rα+ in bone marrow after occupational asthma (OA) model rats are simulated, and to observe the effect of WTKYD Trraitional Chinese Medicine intervention. Methods: A total of 40 healthy male SD model rats (200~250 g weight) were randomly divided into model contrast Group, prednisone acetate intervention Group, WTKYD+1/2 prednisone acetate intervention Group and WTKYD intervention Group, 10 in each group, and set a Group for blank contrast...
September 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/27864284/region-specific-role-for-pten-in-maintenance-of-epithelial-phenotype-and-integrity
#18
Per Flodby, Janice Marie Liebler, Mitsuhiro Sunohara, Dan Ran, Alicia M McConnell, Manda Sai Krishnaveni, Agnes Banfalvi, Min Li, Barry R Stripp, Beiyun Zhou, Edward D Crandall, Parviz Minoo, Zea Borok
Previous studies have demonstrated resistance to naphthalene-induced injury in proximal airways of mice with lung epithelial-specific deletion of the tumor-suppressor gene Pten, attributed to increased proliferation of airway progenitors. We tested effects of Pten loss following bleomycin injury, a model typically used to study distal lung epithelial injury, in conditional PtenSFTPC-cre knockout mice. Pten-deficient airway epithelium exhibited marked hyperplasia, particularly in small bronchioles and at bronchoalveolar duct junctions, with reduced E-cadherin and β-catenin expression between cells towards the luminal aspect of the hyperplastic epithelium...
November 18, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27860185/sildenafil-attenuates-hypoxic-pulmonary-remodelling-by-inhibiting-bone-marrow-progenitor-cells
#19
Shirley Favre, Elisa Gambini, Patrizia Nigro, Alessandro Scopece, Paola Bianciardi, Anna Caretti, Giulio Pompilio, Antonio F Corno, Giuseppe Vassalli, Ludwig K von Segesser, Michele Samaja, Giuseppina Milano
The recruitment of bone marrow (BM)-derived progenitor cells to the lung is related to pulmonary remodelling and the pathogenesis of pulmonary hypertension (PH). Although sildenafil is a known target in PH treatment, the underlying molecular mechanism is still elusive. To test the hypothesis that the therapeutic effect of sildenafil is linked to the reduced recruitment of BM-derived progenitor cells, we induced pulmonary remodelling in rats by two-week exposure to chronic hypoxia (CH, 10% oxygen), a trigger of BM-derived progenitor cells...
November 18, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27822340/stem-progenitor-cells-and-obstructive-sleep-apnea-syndrome-new-insights-for-clinical-applications
#20
REVIEW
Miruna Mihaela Micheu, Ana-Maria Rosca, Oana-Claudia Deleanu
Obstructive sleep apnea syndrome (OSAS) is a widespread disorder, characterized by recurrent upper airway obstruction during sleep, mostly as a result of complete or partial pharyngeal obstruction. Due to the occurrence of frequent and regular hypoxic events, patients with OSAS are at increased risk of cardiovascular disease, stroke, metabolic disorders, occupational errors, motor vehicle accidents and even death. Thus, OSAS has severe consequences and represents a significant economic burden. However, some of the consequences, as well as their costs can be reduced with appropriate detection and treatment...
October 26, 2016: World Journal of Stem Cells
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