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https://www.readbyqxmd.com/read/28544348/galectin-1-promotes-an-m2-macrophage-response-to-polydioxanone-scaffolds
#1
Daniel Abebayehu, Andrew Spence, Barbara D Boyan, Zvi Schwartz, John J Ryan, Michael J McClure
Regulating soft tissue repair to prevent fibrosis and promote regeneration is central to creating a microenvironment conducive to soft tissue development. Macrophages play an important role in this process. Their response can be modulated using biomaterials, altering cytokine and growth factor secretion to promote regeneration. Electrospun polydioxanone (PDO) fiber scaffolds promoted an M2 phenotype when macrophages were cultured on large diameter, highly porous scaffolds, but an M1 phenotype on smaller diameter fibers...
May 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28540527/alignment-of-inducible-vascular-progenitor-cells-on-a-micro-bundle-scaffold-improves-cardiac-repair-following-myocardial-infarction
#2
Anurag Jamaiyar, Weiguo Wan, Vahagn Ohanyan, Molly Enrick, Danielle Janota, Devan Cumpston, Hokyung Song, Kelly Stevanov, Christopher L Kolz, Tatev Hakobyan, Feng Dong, Bi-Min Zhang Newby, William M Chilian, Liya Yin
Ischemic heart disease is still the leading cause of death even with the advancement of pharmaceutical therapies and surgical procedures. Early vascularization in the ischemic heart is critical for a better outcome. Although stem cell therapy has great potential for cardiovascular regeneration, the ideal cell type and delivery method of cells have not been resolved. We tested a new approach of stem cell therapy by delivery of induced vascular progenitor cells (iVPCs) grown on polymer micro-bundle scaffolds in a rat model of myocardial infarction...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28536085/interaction-between-the-effects-of-the-selective-estrogen-modulator-femarelle-and-a-vitamin-d-analog-in-human-umbilical-artery-vascular-smooth-muscle-cells
#3
Dalia Somjen, Esther Knoll, Orli Sharon, Ariel Many, Naftali Stern
To further investigate the interaction between vitamin D system and estrogen-mimetic compounds in the human vasculature we studied the effect of the "less- calcemic" analog of 1,25(OH)2D3 (1,25D); JK 1624F2-2 (JKF) in the presence of selective estrogen modulator femarelle (F), the phytoestrogen daidzein (D) and estradiol-17b (E2) on (3)[H] thymidine incorporation (DNA synthesis) and creatine kinase specific activity (CK) in human umbilical artery vascular smooth muscle cells (VSMC). F, D and E2, stimulated DNA synthesis at low concentrations, and inhibited it at high concentrations...
May 20, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28535533/malat1-modulates-tgf-%C3%AE-1-induced-endothelial-to-mesenchymal-transition-through-downregulation-of-mir-145
#4
Yin Xiang, Yachen Zhang, Yong Tang, Qianhui Li
BACKGROUND/AIMS: Endothelial-to-mesenchymal transition (EndMT) plays significant roles under various pathological conditions including cardiovascular diseases, fibrosis, and cancer. EndMT of endothelial progenitor cells (EPCs) contributes to neointimal hyperplasia following cell therapy Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is a long non-coding RNA (lncRNA) that promotes metastasis and cancer. MicroRNA-145 (miR-145) is a tumor suppressor that has been reported to inhibit SMAD3-mediated epithelial-to-mesenchymal transition (EMT) of cancer cells...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28534977/runx3-modulates-hypoxia-induced-endothelial-to-mesenchymal-transition-of-human-cardiac-microvascular-endothelial-cells
#5
Yanhua Liu, Jin Zou, Bingong Li, Yuqin Wang, Delong Wang, Yanqin Hao, Xuan Ke, Xingxing Li
Endothelial-mesenchymal transition (EndMT) is an essential mechanism in the cardiovascular system, for both cardiovascular development and cardiovascular diseases (CVDs). Recent studies indicate that runt-related transcription factor 3 (RUNX3) contributes to EndMT and endothelial cell dysfunction. However, the underlying molecular mechanism remains unknown. The present study was designed to investigate the role of RUNX3 in EndMT and endothelial cell function, and to elucidate the underlying molecular mechanism...
May 22, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28534511/stromal-derived-igf2-promotes-colon-cancer-progression-via-paracrine-and-autocrine-mechanisms
#6
C Unger, N Kramer, D Unterleuthner, M Scherzer, A Burian, A Rudisch, M Stadler, M Schlederer, D Lenhardt, A Riedl, S Walter, A Wernitznig, L Kenner, M Hengstschläger, J Schüler, W Sommergruber, H Dolznig
The insulin-like growth factor (IGF)2/IGF1 receptor (IGF1R) signaling axis has an important role in intestinal carcinogenesis and overexpression of IGF2 is an accepted risk factor for colorectal cancer (CRC) development. Genetic amplifications and loss of imprinting contribute to the upregulation of IGF2, but insufficiently explain the extent of IGF2 expression in a subset of patients. Here, we show that IGF2 was specifically induced in the tumor stroma of CRC and identified cancer-associated fibroblasts (CAFs) as the major source...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28532087/the-repairing-of-full-thickness-skin-deficiency-and-its-biological-mechanism-using-decellularized-human-amniotic-membrane-as-the-wound-dressing
#7
Mengsheng Song, Weiqing Wang, Qihua Ye, Shizhong Bu, Zhisen Shen, Yabin Zhu
Human amniotic membrane (HAM) was a biocompatible scaffold with advantages of anti-inflammatory, low antigen, feasibility, tolerance and low cost. In our previous work, HAM was treated to be decellularized using surfactant, lipase and DNAase methods and the efficacy as an implantable biological mesh was verified after decellularization treatment. In this work, we used the previous protocol to decellularize the fresh HAM, and applied it to repair full-thickness skin defects with Sprague-Dawley rats as the test animals...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529619/effects-of-prolonged-exposure-to-low-dose-metformin-in-thyroid-cancer-cell-lines
#8
Safar Kheder, Karen Sisley, Sirwan Hadad, Sabapathy P Balasubramanian
Background: Thyroid cancer is generally associated with an excellent prognosis, but there is significant long-term morbidity with standard treatment. Some sub-types however have a poor prognosis. Metformin, an oral anti-diabetic drug is shown to have anti-cancer effects in several types of cancer (breast, lung and ovarian cancer). The proposed mechanisms include activation of the Adenosine Mono-phosphate-activated Protein Kinase (AMPK) pathway and inhibition of the mTOR pathway (which promotes growth and proliferation)...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28526559/a-single-nucleotide-polymorphism-of-cyclin-dependent-kinase-inhibitor-1b-p27-kip1-associated-with-human-vein-graft-failure-affects-growth-of-human-venous-adventitial-cells-but-not-smooth-muscle-cells
#9
Richard D Kenagy, Shinsuke Kikuchi, Lihua Chen, Errol S Wijelath, Andrew B Stergachis, John Stamatoyannopoulos, Gale L Tang, Alexander W Clowes, Michael Sobel
BACKGROUND: Cyclin-dependent kinase inhibitor 1B (p27(Kip1)) is a cell-cycle inhibitor whose -838C>A single nucleotide polymorphism (rs36228499; hereafter called p27 SNP) has been associated with the clinical failure of peripheral vein grafts, but the functional effects of this SNP have not been demonstrated. METHODS: Human saphenous vein adventitial cells and intimal/medial smooth muscle cells (SMCs) were derived from explants obtained at the time of lower extremity bypass operations...
May 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28512246/tumor-associated-macrophages-promote-malignant-progression-of-breast-phyllodes-tumors-by-inducing-myofibroblast-differentiation
#10
Yan Nie, Jia-Ning Chen, Di Huang, Yandan Yao, Jiewen Chen, Lin Ding, Jiayi Zeng, Shicheng Su, Xue Chao, Fengxi Su, Herui Yao, Hai Hu, Erwei Song
Myofibroblast differentiation plays an important role in the malignant progression of phyllodes tumor (PT), a fast-growing neoplasm derived from periductal stromal cells of the breast. Macrophages are frequently found in close proximity with myofibroblasts, but it is uncertain whether they are involved in the myofibroblast differentiation during PT progression. Here we show that increased density of tumor associated macrophage (TAM) correlates with malignant progression of PT. We found that TAM stimulated myofibroblast differentiation and promoted the proliferation and invasion of PT cells...
May 16, 2017: Cancer Research
https://www.readbyqxmd.com/read/28510617/mir-146a-5p-acts-as-a-negative-regulator-of-tgf-%C3%AE-signaling-in-skeletal-muscle-after-acute-contusion
#11
Yaying Sun, Yan Li, Hui Wang, Hongyun Li, Shaohua Liu, Jiwu Chen, Hao Ying
Growing evidence suggests the importance of microRNAs (miRNAs) in stress signaling pathways. Transforming growth factor-β (TGF-β) is a potent cytokine that promotes the development of skeletal muscle fibrosis after acute contusion. However, how miRNAs are involved in TGF-β signaling and confer the robustness of TGF-β-induced fibrotic response remains to be fully elucidated. Here, we demonstrated that miR-146a-5p (miR-146) levels were reduced in a fibrotic mouse model after acute muscle contusion. It was also found that TGF-β treatment decreased the expression of miR-146 in vitro in a dose- and time-dependent manner...
May 16, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28504717/fibulin-3-promotes-muscle-invasive-bladder-cancer
#12
A L Han, B A Veeneman, L El-Sawy, K C Day, M L Day, S A Tomlins, E T Keller
Urothelial carcinoma is the most common type of bladder cancer and can be categorized as either non-muscle-invasive (Ta-T1) or muscle-invasive (⩾T2). The majority of bladder cancers are non-muscle-invasive at presentation; however, the recurrence rate for these tumors is high and a subset can progress to T2. In this study, we aimed to identify genes differentially expressed between T1 vs T2 bladder cancer to identify key regulators of bladder cancer progression and/or invasion. We performed RNA-Seq on T1 and T2 bladder cancer tissues and used publicly available bladder cancer profiling studies to prioritize differentially expressed genes for validation and functional assessment...
May 15, 2017: Oncogene
https://www.readbyqxmd.com/read/28499840/antimicrobial-peptide-ksl-w-promotes-gingival-fibroblast-healing-properties-in-vitro
#13
Hyun-Jin Park, Mabrouka Salem, Abdelhabib Semlali, Kai P Leung, Mahmoud Rouabhia
We investigated the effect of synthetic antimicrobial decapeptide KSL-W (KKVVFWVKFK) on normal human gingival fibroblast growth, migration, collagen gel contraction, and α-smooth muscle actin protein expression. Results show that in addition to promoting fibroblast adhesion by increasing F-actin production, peptide KSL-W promoted cell growth by increasing the S and G2/M cell cycle phases, and enhanced the secretion of metalloproteinase (MMP)-1 and MMP-2 by upregulating MMP inhibitors, such as tissue inhibitors of metalloproteinase (TIMP)-1 and TIMP-2 in fibroblasts...
May 9, 2017: Peptides
https://www.readbyqxmd.com/read/28494385/l-leucine-dietary-supplementation-modulates-muscle-protein-degradation-and-increases-pro-inflammatory-cytokines-in-tumour-bearing-rats
#14
Bread Cruz, André Oliveira, Maria Cristina Cintra Gomes-Marcondes
Cancer cachexia is characterised by involuntary weight loss associated with systemic inflammation and metabolic changes. Studies aimed at maintaining lean body mass in cachectic tumour-bearing hosts have made important contributions reducing the number of deaths and improving the quality of life. In recent years, leucine has demonstrated effective action in maintaining lean body mass by decreasing muscle protein degradation. Currently, there is a growing need to understand how leucine stimulates protein synthesis and acts protectively in a cachectic organism...
May 8, 2017: Cytokine
https://www.readbyqxmd.com/read/28490449/enhanced-insulin-secretion-and-insulin-sensitivity-in-young-lambs-with-placental-insufficiency-induced-intrauterine-growth-restriction
#15
Leticia E Camacho, Xiaochuan Chen, William W Hay, Sean W Limesand
Intrauterine growth restriction (IUGR) is associated with persistent metabolic complications, but information is limited for IUGR infants. We determined glucose-stimulated insulin secretion (GSIS) and insulin sensitivity in young lambs with placental insufficiency-induced IUGR. Lambs with hyperthermia-induced IUGR (n=7) were compared to control lambs (n=8). GSIS was measured at 8±1 days of age, and at 15±1 days body weight-specific glucose utilization rates were measured with radiolabeled D-glucose during a hyperinsulinemic-euglycemic clamp (HEC)...
May 10, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28473774/lncrna-six1-encodes-a-micropeptide-to-activate-six1-in-cis-and-is-involved-in-cell-proliferation-and-muscle-growth
#16
Bolin Cai, Zhenhui Li, Manting Ma, Zhijun Wang, Peigong Han, Bahareldin A Abdalla, Qinghua Nie, Xiquan Zhang
Long non-coding RNAs (lncRNAs) play important roles in epigenetic regulation of skeletal muscle development. In our previous RNA-seq study (accession number GSE58755), we found that lncRNA-Six1 is an lncRNA that is differentially expressed between White Recessive Rock (WRR) and Xinghua (XH) chicken. In this study, we have further demonstrated that lncRNA-Six1 is located 432 bp upstream of the gene encoding the protein Six homeobox 1 (Six1). A dual-luciferase reporter assay identified that lncRNA-Six1 overlaps the Six1 proximal promoter...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28473445/estrogen-receptor-control-of-atherosclerotic-calcification-and-smooth-muscle-cell-osteogenic-differentiation
#17
Lucinda S McRobb, Kristine C Y McGrath, Tania Tsatralis, Eleanore C Liong, Joanne T M Tan, Gillian Hughes, David J Handelsman, Alison K Heather
OBJECTIVE: Vascular calcification is associated with increased risk of myocardial infarction and stroke. The objective of this work was to examine the ability of 17β-estradiol (E2) to stimulate calcification of vascular smooth muscle cells (VSMC) in vivo, using aged apolipoprotein E-null mice with advanced atherosclerotic lesions, and subsequently to explore underlying mechanisms in vitro. APPROACH AND RESULTS: Silastic E2 capsules were implanted into male and female apolipoprotein E-null mice aged 34 weeks...
May 4, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28473442/janus-kinase-3-a-novel-regulator-for-smooth-muscle-proliferation-and-vascular-remodeling
#18
Yung-Chun Wang, Xiao-Bing Cui, Ya-Hui Chuang, Shi-You Chen
OBJECTIVE: Vascular remodeling because of smooth muscle cell (SMC) proliferation is a common process occurring in several vascular diseases, such as atherosclerosis, aortic aneurysm, post-transplant vasculopathy, restenosis after angioplasty, etc. The molecular mechanism underlying SMC proliferation, however, is not completely understood. The objective of this study is to determine the role and mechanism of Janus kinase 3 (JAK3) in vascular remodeling and SMC proliferation. APPROACH AND RESULTS: Platelet-derived growth factor-BB, an SMC mitogen, induces JAK3 expression and phosphorylation while stimulating SMC proliferation...
May 4, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28473062/coffee-consumption-prevents-fibrosis-in-a-rat-model-that-mimics-secondary-biliary-cirrhosis-in-humans
#19
Jonathan Arauz, Natanael Zarco, Erika Hernández-Aquino, Marina Galicia-Moreno, Liliana Favari, José Segovia, Pablo Muriel
Investigations demonstrated that oxidative stress plays an important role in injury promotion in cholestatic liver disease. We hypothesized that coffee attenuates cholestasis-induced hepatic necrosis and fibrosis via its antioxidant, anti-inflammatory, and antifibrotic properties. The major aim of this study was to evaluate the hepatoprotective properties of coffee and caffeine in a model of chronic bile duct ligation (BDL) in male Wistar rats. Liver injury was induced by 28-day BDL, and conventional coffee, decaffeinated coffee, or caffeine was administered daily...
April 2017: Nutrition Research
https://www.readbyqxmd.com/read/28471324/the-structure-function-relationships-of-insulin-like-growth-factor-1-ec-in-c2c12-cells
#20
Qian Yi, Jianguo Feng, Ling He, Rongxue Wan, Hui Zeng, Li Yang, Shiyong Wu, Liling Tang
Insulin-like growth factor 1 (IGF1) is a crucial growth factor, that regulates skeletal muscles development during cell growth and repair. Recently, its alternative splicing variant, named IGF1Ec, also named mechano-growth factor (MGF), has gained attentions as a new damage repair factor. However, the structure-function relationships of IGF1Ec have not been fully clarified due to contradictory reports. In this study, we systematically investigated physiologic responses of C2C12 muscle cells to IGF1Ec, IGF1 and MGF E peptide...
May 4, 2017: Cell Adhesion & Migration
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