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https://www.readbyqxmd.com/read/28228756/agonistic-anti-pdgf-receptor-autoantibodies-from-patients-with-systemic-sclerosis-impact-human-pulmonary-artery-smooth-muscle-cells-function-in-vitro
#1
Silvia Svegliati, Donatella Amico, Tatiana Spadoni, Colomba Fischetti, Doreen Finke, Gianluca Moroncini, Chiara Paolini, Cecilia Tonnini, Antonella Grieco, Marina Rovinelli, Armando Gabrielli
One of the earliest events in the pathogenesis of systemic sclerosis (SSc) is microvasculature damage with intimal hyperplasia and accumulation of cells expressing PDGF receptor. Stimulatory autoantibodies targeting PDGF receptor have been detected in SSc patients and demonstrated to induce fibrosis in vivo and convert in vitro normal fibroblasts into SSc-like cells. Since there is no evidence of the role of anti-PDGF receptor autoantibodies in the pathogenesis of SSc vascular lesions, we investigated the biologic effect of agonistic anti-PDGF receptor autoantibodies from SSc patients on human pulmonary artery smooth muscle cells and the signaling pathways involved...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28228629/involvement-of-the-calcium-sensing-receptor-in-mineral-trioxide-aggregateinduced-osteogenic-gene-expression-in-murine-mc3t3-e1-cells
#2
Takuya Yasukawa, Makoto Hayashi, Natsuko Tanabe, Hiromasa Tsuda, Yusuke Suzuki, Takayuki Kawato, Naoto Suzuki, Masao Maeno, Bunnai Ogiso
Mineral trioxide aggregate (MTA) has excellent biocompatibility as well as bioactivity, including an ability to induce osteoblast differentiation. We examined the effects of the calcium-sensing receptor (CaSR) on osteogenic gene expression induced by MTA. MC3T3-E1 cells were cultured with or without (control) MTA. The expression levels of Runx2, type I collagen, and CaSR genes were analyzed by real-time polymerase chain reaction and their products were measured using enzyme-linked immunosorbent assays. The levels were increased significantly in cells exposed to MTA compared with control...
February 22, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28225655/mnte-2-pyp-treatment-or-nox4-inhibition-protects-against-radiation-induced-damage-in-mouse-primary-prostate-fibroblasts-by-inhibiting-the-tgf-beta-1-signaling-pathway
#3
Arpita Chatterjee, Elizabeth A Kosmacek, Rebecca E Oberley-Deegan
Prostate cancer patients who undergo radiotherapy frequently suffer from side effects caused by radiation-induced damage to normal tissues adjacent to the tumor. Exposure of these normal cells during radiation treatment can result in tissue fibrosis and cellular senescence, which ultimately leads to postirradiation-related chronic complications including urinary urgency and frequency, erectile dysfunction, urethral stricture and incontinence. Radiation-induced reactive oxygen species (ROS) have been reported as the most potent causative factor for radiation damage to normal tissue...
February 22, 2017: Radiation Research
https://www.readbyqxmd.com/read/28222408/severe-osteoporosis-with-multiple-spontaneous-vertebral-fractures-in-a-young-male-carrying-triple-polymorphisms-in-the-vitamin-d-receptor-collagen-type-1-and-low-density-lipoprotein-receptor-related-peptide-5-genes
#4
Maria P Yavropoulou, Panagoulia Kollia, Dimitris Chatzidimitriou, Stavroula Samara, Lemonia Skoura, John G Yovos
: Osteoporosis is a common disease with a strong genetic component. Several studies have reported the vitamin D receptor (VDR), collagen type I (COL1A1), and LDL receptor-related protein 5 (LRP5) genes as the most likely candidates. However, most of the studies have been carried out in postmenopausal women and older men and show inconsistent results. CASE PRESENTATION: We report a case of a 26-year old male who presented with severe back pain of acute onset, unrelated to any kind of trauma, and diffuse myalgia...
October 2016: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28220032/pharmacologic-blockade-of-%C3%AE-v%C3%AE-1-integrin-ameliorates-renal-failure-and-fibrosis-in-vivo
#5
Yongen Chang, Wei Ling Lau, Hyunil Jo, Kazuyuki Tsujino, Leslie Gewin, Nilgun Isik Reed, Amha Atakilit, Ane Claudia Fernandes Nunes, William F DeGrado, Dean Sheppard
Activated fibroblasts are deemed the main executors of organ fibrosis. However, regulation of the pathologic functions of these cells in vivo is poorly understood. PDGF receptor β (PDGFRβ) is highly expressed in activated pericytes, a main source of fibroblasts. Studies using a PDGFRβ promoter-driven Cre system to delete αv integrins in activated fibroblasts identified these integrins as core regulators of fibroblast activity across solid organs, including the kidneys. Here, we used the same PDGFRβ-Cre line to isolate and study renal fibroblasts ex vivo We found that renal fibroblasts express three αv integrins, namely αvβ1, αvβ3, and αvβ5...
February 20, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28217782/receptor-for-hyaluronan-mediated-motility-rhamm-hmmr-is-a-novel-target-for-promoting-subcutaneous-adipogenesis
#6
S B Bahrami, C Tolg, T Peart, C Symonette, M Veiseh, J U Umoh, D W Holdsworth, J B McCarthy, L G Luyt, M J Bissell, A Yazdani, E A Turley
Hyaluronan, CD44 and the Receptor for Hyaluronan-Mediated Motility (RHAMM, gene name HMMR) regulate stem cell differentiation including mesenchymal progenitor differentiation. Here, we show that CD44 expression is required for subcutaneous adipogenesis, whereas RHAMM expression suppresses this process. We designed RHAMM function blocking peptides to promote subcutaneous adipogenesis as a clinical and tissue engineering tool. Adipogenic RHAMM peptides were identified by screening for their ability to promote adipogenesis in culture assays using rat bone marrow mesenchymal stem cells, mouse pre-adipocyte cell lines and primary human subcutaneous pre-adipocytes...
February 20, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28216055/human-eosinophils-constitutively-express-a-unique-serine-protease-prss33
#7
Sumika Toyama, Naoko Okada, Akio Matsuda, Hideaki Morita, Hirohisa Saito, Takao Fujisawa, Susumu Nakae, Hajime Karasuyama, Kenji Matsumoto
BACKGROUND: Eosinophils play important roles in asthma, especially airway remodeling, by producing various granule proteins, chemical mediators, cytokines, chemokines and proteases. However, protease production by eosinophils is not fully understood. In the present study, we investigated the production of eosinophil-specific proteases/proteinases by transcriptome analysis. METHODS: Human eosinophils and other cells were purified from peripheral blood by density gradient sedimentation and negative/positive selections using immunomagnetic beads...
February 16, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28215986/the-%C3%AE-4galt1-affects-the-fibroblast-like-synoviocytes-invasion-in-rheumatoid-arthritis-by-modifying-n-linked-glycosylation-of-cxcr3
#8
Chi Sun, Xinhui Zhu, Tao Tao, Dongmei Zhang, Yi Wang, Hua Xu, Yunli Ren, Youhua Wang
OBJECTIVE: The level of β-1,4-galactosyltransferase 1 (β4GalT1) is up-regulated in collagen-induced arthritis (CIA) mice. It is reported that CXC chemokine receptor 3 (CXCR3) can enhance the invasiveness of fibroblast-like synoviocytes (FLS) in rheumatoid arthritis (RA). This study aims to investigate the specific mechanism of β4GalT1 and relationship between β4GalT1 and CXCR3 in RA. METHODS: The model of CIA mice was established to explore the role of β4GalT1...
February 10, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28214842/inhibition-of-methylglyoxal-induced-ages-rage-expression-contributes-to-dermal-protection-by-n-acetyl-l-cysteine
#9
Chun-Tao Yang, Fu-Hui Meng, Li Chen, Xiang Li, Lai-Jian Cen, Yu-Hua Wen, Cai-Chen Li, Hui Zhang
BACKGROUND/AIM: Accumulation of advanced glycation end products (AGEs) is a major cause of diabetes mellitus (DM) skin complications. Methylglyoxal (MGO), a reactive dicarbonyl compound, is a crucial intermediate of AGEs generation. N-acetyl-L-cysteine (NAC), an active ingredient of some medicines, can induce endogenous GSH and hydrogen sulfide generation, and set off a condensation reaction with MGO. However, there is rare evidence to show NAC can alleviate DM-induced skin injury through inhibition of AGEs generation or toxicity...
13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214531/the-skeletal-developmental-toxicity-of-chlormequat-chloride-and-its-underlying-mechanisms
#10
Dan Huang, Shuang Wu, Xiaohong Hou, Lixia Jia, Qinghe Meng, Hongqian Chu, Jianjun Jiang, Lanqin Shang, Weidong Hao
Chlormequat Chloride (CCC), a widely used plant growth regulator, could decrease body weight in animals; however, the mechanism has not been well studied. This study was designed to evaluate the skeletal development toxicity of CCC on pubertal male Sprague-Dawley (SD) rats and to investigate whether CCC impacts the development of chondrocyte, osteoblast and osteoclast through growth hormone (GH) and insulin like growth factor 1 (IGF-I). Rats from 23 to 70 on postnatal days were exposed to CCC daily by gavage at doses of 0, 75, 150, and 300mg/kg bw/d...
February 15, 2017: Toxicology
https://www.readbyqxmd.com/read/28213819/conditional-knockout-of-activin-like-kinase-1-alk-1-leads-to-heart-failure-without-maladaptive-remodeling
#11
Kevin J Morine, Xiaoying Qiao, Vikram Paruchuri, Mark J Aronovitz, Emily E Mackey, Lyanne Buiten, Jonathan Levine, Keshan Ughreja, Prerna Nepali, Robert M Blanton, Richard H Karas, S Paul Oh, Navin K Kapur
Activin like kinase-1 (AlK-1) mediates signaling via the transforming growth factor beta (TGFβ) family of ligands. AlK-1 activity promotes endothelial proliferation and migration. Reduced AlK-1 activity is associated with arteriovenous malformations. No studies have examined the effect of global AlK-1 deletion on indices of cardiac remodeling. We hypothesized that reduced levels of AlK-1 promote maladaptive cardiac remodeling. To test this hypothesis, we employed AlK-1 conditional knockout mice (cKO) harboring the ROSA26-CreER knock-in allele, whereby a single dose of intraperitoneal tamoxifen triggered ubiquitous Cre recombinase-mediated excision of floxed AlK-1 alleles...
February 17, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28213554/hypoxia-selectively-enhances-integrin-receptor-expression-to-promote-metastasis
#12
Julia A Ju, Ines Godet, I Chae Ye, Jungmin Byun, Hasini Jayatilaka, Sun Joo Lee, Lisha Xiang, Debangshu Samanta, Meng Horng Lee, Pei-Hsun Wu, Denis Wirtz, Gregg L Semenza, Daniele M Gilkes
: Metastasis is the leading cause of breast cancer (BCa)mortality. Previous studies have implicated hypoxia-induced changes in the composition and stiffness of the extracellular matrix (ECM) in the metastatic process. Therefore, the contribution of potential ECM binding receptors in this process was explored. Using a bioinformatics approach the expression of all integrin receptor subunits, in two independent BCa patient data sets, were analyzed to determine if integrin status correlates with a validated hypoxiainducible gene signature...
February 17, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28212783/role-of-topical-dehydroepiandrosterone-in-ameliorating-isotretinoin-induced-meibomian-gland-dysfunction-in-adult-male-albino-rat
#13
Marwa A A Ibrahim, Walaa M Elwan
Isotretinoin broad effectiveness is limited by its detrimental effect on the Meibomian glands. Androgens have been reported to regulate the Meibomian gland function. Dehydroepiandrosterone (DHEA) is an androgen precursor considered as an efficient and physiological anti-ageing skin agent. This study aimed to investigate the role of the topical DHEA in ameliorating Meibomian gland dysfunction caused by isotretinoin employing different histological and immunohistochemical techniques. Twenty-four adult male albino rats were divided into four equal groups; control group, DHEA-treated group (1% twice daily for 3 months), isotretinoin-treated group (0...
February 14, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28209773/mannan-binding-lectin-a-serum-collectin-suppresses-t-cell-proliferation-via-direct-interaction-with-cell-surface-calreticulin-and-inhibition-of-proximal-t-cell-receptor-signaling
#14
Na Zhao, Jie Wu, Simin Xiong, Liyun Zhang, Xiao Lu, Shangliang Chen, Qifeng Wu, Hailan Wang, Ying Liu, Zhengliang Chen, Daming Zuo
Mannan binding lectin (MBL), initially described to activate the complement pathway, is also known to be involved in the pathogenesis of autoimmune diseases. We report a thus far unknown function of MBL as a suppressor of T-cell activation. MBL markedly inhibited T-cell proliferation induced by anti-CD3 and anti-CD28 antibodies. Moreover, the presence of MBL during T-cell priming interfered with proximal T-cell receptor signaling by decreasing phosphorylation of Lck, ZAP-70, and LAT. MBL bound to T cells through interaction between the collagen-like region of MBL and calreticulin (CRT) expressed on the T-cell surface...
February 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28208029/l1-peptide-conjugated-fibrin-hydrogels-promote-salivary-gland-regeneration
#15
K Nam, C-S Wang, C L M Maruyama, P Lei, S T Andreadis, O J Baker
Hyposalivation contributes to dental caries, periodontitis, and microbial infections. Additionally, it impairs activities of daily living (e.g., speaking, chewing, and swallowing). Treatments for hyposalivation are currently limited to medications (e.g., the muscarinic receptor agonists pilocarpine and cevimeline) that induce saliva secretion from residual acinar cells and the use of saliva substitutes. However, given that these therapies provide only temporary relief, the development of alternative treatments to restore gland function is essential...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28207927/attenuated-airway-hyperresponsiveness-and-mucus-secretion-in-hdm-exposed-igf1r-deficient-mice
#16
S Piñeiro-Hermida, J A Gregory, I P López, R Torrens, C Ruíz-Martínez, M Adner, J G Pichel
BACKGROUND: Asthma is a common chronic lung disease characterized by airflow obstruction, airway hyperresponsiveness (AHR) and inflammation. IGFs have been reported to play a role in asthma but little is known about how the Insulin-like Growth Factor 1 Receptor (IGF1R) affects asthma pathobiology. METHODS: Female Igf1r-deficient and control mice were intranasally challenged with house dust mite (HDM) extract or PBS five days per week for four weeks. Lung function measurements, and bronchioalveolar lavage fluid (BALF), serum and lungs were collected on day 28 for further cellular, histological and molecular analysis...
February 16, 2017: Allergy
https://www.readbyqxmd.com/read/28207883/application-of-an-optimized-flow-cytometry-based-quantification-of-platelet-activation-pact-monitoring-platelet-activation-in-platelet-concentrates
#17
Cécile H Kicken, Mark Roest, Yvonne M C Henskens, Bas de Laat, Dana Huskens
BACKGROUND: Previous studies have shown that flow cytometry is a reliable test to quantify platelet function in stored platelet concentrates (PC). It is thought that flow cytometry is laborious and hence expensive. We have optimized the flow cytometry-based quantification of agonist induced platelet activation (PACT) to a labor, time and more cost-efficient test. Currently the quality of PCs is only monitored by visual inspection, because available assays are unreliable or too laborious for use in a clinical transfusion laboratory...
2017: PloS One
https://www.readbyqxmd.com/read/28199848/discoidin-domain-receptor-1-mediates-myosin-dependent-collagen-contraction
#18
Nuno M Coelho, Pamma D Arora, Sander van Putten, Stellar Boo, Petar Petrovic, Alyna Xue Lin, Boris Hinz, Christopher A McCulloch
Discoidin domain receptor 1 (DDR1) is a tyrosine kinase collagen adhesion receptor that mediates cell migration through association with non-muscle myosin IIA (NMIIA). Because DDR1 is implicated in cancer fibrosis, we hypothesized that DDR1 interacts with NMIIA to enable collagen compaction by traction forces. Mechanical splinting of rat dermal wounds increased DDR1 expression and collagen alignment. In periodontal ligament of DDR1 knockout mice, collagen mechanical reorganization was reduced >30%. Similarly, cultured cells with DDR1 knockdown or expressing kinase-deficient DDR1d showed 50% reduction of aligned collagen...
February 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28198034/human-th17-migration-in-three-dimensional-collagen-involves-p38-mapk
#19
Maleck Kadiri, Mohamed-Amine El Azreq, Sofiane Berrazouane, Marc Boisvert, Fawzi Aoudjit
T cell migration across extracellular matrix (ECM) is an important step of the adaptive immune response but is also involved in the development of inflammatory autoimmune diseases. Currently, the molecular mechanisms regulating the motility of effector T cells in ECM are not fully understood. Activation of p38 MAPK has been implicated in T cell activation and is critical to the development of immune and inflammatory responses. In this study, we examined the implication of p38 MAPK in regulating the migration of human Th17 cells through collagen...
February 15, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28194023/interleukin-33-drives-hepatic-fibrosis-through-activation-of-hepatic-stellate-cells
#20
Zhongming Tan, Qianghui Liu, Runqiu Jiang, Long Lv, Siamak S Shoto, Isabelle Maillet, Valerie Quesniaux, Junwei Tang, Wenjie Zhang, Beicheng Sun, Bernhard Ryffel
Liver fibrosis is a consequence of chronic liver disease, causing morbidity and mortality. Interleukin-33 (IL-33) is a critical mediator of inflammation, which may be involved in the development of liver fibrosis. Here, we investigated the role of IL-33 in human patients and experimental bile-duct ligation (BDL)-induced fibrosis in mice. We report increased hepatic IL-33 expression in the murine BDL model of fibrosis and in surgical samples obtained from patients with liver fibrosis. Liver injury, inflammatory cell infiltration and fibrosis were reduced in the absence of the IL-33/ST2 receptor, and the activation of hepatic stellate cells (HSCs) was decreased in ST2-deficient mice...
February 13, 2017: Cellular & Molecular Immunology
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