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https://www.readbyqxmd.com/read/28651163/ex-vivo-assessment-of-valve-thickness-calcification-of-patients-with-calcific-aortic-stenosis-in-relation-to-in-vivo-clinical-outcomes
#1
Ching-Li Cheng, Hsiao-Huang Chang, Pei-Jung Huang, Wei-Chen Wang, Shan-Yang Lin
Calcific aortic stenosis (AS) plays a critical role in the risk of cardiovascular disease. This preliminary study examined the relationship between the ex vivo valve thickness/calcification and in vivo clinical outcomes of Chinese patients with calcific AS. Six Chinese patients (3 patients with tricuspid aortic valves (TAV)) and 3 patients with. bicuspid aortic valves (BAV) with calcific AS undergoing heart valve replacement were initially chosen for this study. In vivo medical imaging of these calcific AS patients was evaluated using computed tomography and echocardiography...
June 22, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28650600/clear-cell-neuroendocrine-tumor-of-the-pancreas-in-von-hippel-lindau-disease-a-case-report-and-literature-review
#2
(no author information available yet)
Clear cell neuroendocrine tumor (NET) of the pancreas is found in von Hippel-Lindau (VHL) disease, multiple endocrine neoplasia type I (MEN I), and sporadic form. Clear cell NETs are often misdiagnosed as metastatic renal cell carcinoma. A 47-year-old woman with VHL was found to have a mass in the pancreatic tail and two masses in the right kidney with two cysts. A distal pancreatectomy and right radical nephrectomy were performed. The pancreatic lesion was a well-circumscribed, golden-yellow solid mass, which was lobulated by septal fibrosis...
May 26, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28649632/three-dimensional-organotypic-co-culture-model-of-intestinal-epithelial-cells-and-macrophages-to-study-salmonella-enterica-colonization-patterns
#3
Jennifer Barrila, Jiseon Yang, Aurélie Crabbé, Shameema F Sarker, Yulong Liu, C Mark Ott, Mayra A Nelman-Gonzalez, Simon J Clemett, Seth D Nydam, Rebecca J Forsyth, Richard R Davis, Brian E Crucian, Heather Quiriarte, Kenneth L Roland, Karen Brenneman, Clarence Sams, Christine Loscher, Cheryl A Nickerson
Three-dimensional models of human intestinal epithelium mimic the differentiated form and function of parental tissues often not exhibited by two-dimensional monolayers and respond to Salmonella in key ways that reflect in vivo infections. To further enhance the physiological relevance of three-dimensional models to more closely approximate in vivo intestinal microenvironments encountered by Salmonella, we developed and validated a novel three-dimensional co-culture infection model of colonic epithelial cells and macrophages using the NASA Rotating Wall Vessel bioreactor...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28646903/human-adipose-tissue-mesenchymal-stromal-cells-and-their-extracellular-vesicles-act-differentially-on-lung-mechanics-and-inflammation-in-experimental-allergic-asthma
#4
Ligia Lins de Castro, Debora Gonçalves Xisto, Jamil Zola Kitoko, Fernanda Ferreira Cruz, Priscilla Christina Olsen, Patricia Albuquerque Garcia Redondo, Tatiana Paula Teixeira Ferreira, Daniel Jay Weiss, Marco Aurélio Martins, Marcelo Marcos Morales, Patricia Rieken Macedo Rocco
BACKGROUND: Asthma is a chronic inflammatory disease that can be difficult to treat due to its complex pathophysiology. Most current drugs focus on controlling the inflammatory process, but are unable to revert the changes of tissue remodeling. Human mesenchymal stromal cells (MSCs) are effective at reducing inflammation and tissue remodeling; nevertheless, no study has evaluated the therapeutic effects of extracellular vesicles (EVs) obtained from human adipose tissue-derived MSCs (AD-MSC) on established airway remodeling in experimental allergic asthma...
June 24, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28646872/role-of-p2x7r-in-the-development-and-progression-of-pulmonary-hypertension
#5
Jie Yin, Shuling You, Haopeng Liu, Li Chen, Chengdong Zhang, Hesheng Hu, Mei Xue, Wenjuan Cheng, Ye Wang, Xinran Li, Yugen Shi, Nannan Li, Suhua Yan, Xiaolu Li
BACKGROUND: Pulmonary arterial hypertension (PAH) is a devastating disease that lacks sufficient treatment. Studies have shown that the Nod-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome contributes to PAH pathogenesis, but the role of the upstream molecular P2X7 receptor (P2X7R) has remained unexplored. We investigated the role of P2X7R in the pathogenesis of PAH. METHODS AND RESULTS: PH was induced by a single subcutaneous injection of monocrotaline (MCT) (60 mg/kg) on left pneumonectomised Sprague-Dawley rats, as validated by significant increases in pulmonary artery pressure and vessel wall thickness...
June 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28646507/influences-of-placental-growth-factor-on-mouse-retinal-vascular-development
#6
Vanessa R Kay, Chandrakant Tayade, Peter Carmeliet, B Anne Croy
BACKGROUND: Placental Growth Factor (PGF) is important for wound-healing and vascular collaterogenesis. PGF deficiency is associated with preeclampsia, a hypertensive disease of human pregnancy. Offspring born to preeclamptic mothers display cognitive impairments and brain vascular and neurostructural deviations. Low PGF production during development may contribute to alterations in offspring cerebrovascular beds. Retina is a readily accessible part of the central nervous system with a well-described pattern of vascular development in mice...
June 24, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28646444/engineering-3d-models-of-tumors-and-bone-to-understand-tumor-induced-bone-disease-and-improve-treatments
#7
REVIEW
Kristin A Kwakwa, Joseph P Vanderburgh, Scott A Guelcher, Julie A Sterling
PURPOSE OF REVIEW: Bone is a structurally unique microenvironment that presents many challenges for the development of 3D models for studying bone physiology and diseases, including cancer. As researchers continue to investigate the interactions within the bone microenvironment, the development of 3D models of bone has become critical. RECENT FINDINGS: 3D models have been developed that replicate some properties of bone, but have not fully reproduced the complex structural and cellular composition of the bone microenvironment...
June 23, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28645189/the-potential-role-of-retinoic-acid-receptor-%C3%AE-on-glomerulosclerosis-in-rats-and-podocytes-injury-is-associated-with-the-induction-of-mmp2-and-mmp9
#8
Xiuping Chen, Yuanhan Qin, Tianbiao Zhou, Ling Jiang, Fengying Lei, He Qin, Lei Zhang, Zhiqiang Zhou
Retinoic acid receptor α (RARα) plays a crucial role in kidney disease. However, the underlying mechanisms in glomerulosclerosis (GS) is still not clear. The roles of RARα in an adriamycin (ADR)-induced GS rat model and in ADR-induced podocyte injury in vitro were investigated. RARα was over-expressed in GS rats, and serum, urine and kidney samples were collected to detect the induction of the expression of the receptor. RARα expression was inhibited and/or over-expressed in cultured podocytes following injury, as demonstrated by morphometric assays, cell toxicity, and matrix metalloproteinase (MMP) enzymatic activity...
June 22, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28645103/colxv-promotes-adipocyte-differentiation-via-inhibiting-dna-methylation-and-camp-pka-pathway-in-mice
#9
Guannv Liu, Meihang Li, Yatao Xu, Song Wu, Muhammad Saeed, Chao Sun
Extracellular matrix (ECM), as an essential component of adipose tissue, not only provides mechanical support for adipocyte growth, but also participates in ECM-adipocyte communication via various secreted proteins, including highly enriched collagens. Collagen XV (ColXV) is a secreted non-fibrillar collagen within ECM Basement Membrane (BM) zones and well recognized as a tumor suppressor. However, the role of ColXV in adipose tissue is still unknown. In this study, high fat diet (HFD) fed mice were used as obese model, in which we deeply investigated the interaction between ColXV and adipocyte differentiation or adipose metabolism...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28645009/case-report-of-robotic-dor-fundoplication-for-scleroderma-esophagus-with-aperistalsis-on-manometry
#10
Alonso Andrade, Matthew K Folstein, Brian R Davis
Scleroderma is a systemic disease of collagen deposition resulting in fibrosis of small arteries and arterioles. It commonly affects the skin, lungs, and gastrointestinal tract. The most common site of GI tract involvement is the esophagus. We present the case report of a 44year old female with scleroderma esophagus and severe reflux which was successfully treated with robotic dor fundoplication. Because of the wide variety of symptoms with which this problem can present, a tailored approach taking into consideration the patient's symptomatology and findings during diagnostic work-up was implemented with good results...
June 16, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28644870/effects-of-nicotine-on-corneal-wound-healing-following-acute-alkali-burn
#11
Jong Won Kim, Chae Woong Lim, Bumseok Kim
Epidemiological studies have indicated that smoking is a pivotal risk factor for the progression of several chronic diseases. Nicotine, the addictive component of cigarettes, has powerful pathophysiological properties in the body. Although the effects of cigarette smoking on corneal re-epithelialization have been studied, the effects of nicotine on corneal wound healing-related neovascularization and fibrosis have not been fully demonstrated. The aim of this study was to evaluate the effects of chronic administration of nicotine on corneal wound healing following acute insult induced by an alkali burn...
2017: PloS One
https://www.readbyqxmd.com/read/28644862/high-intensity-corneal-collagen-crosslinking-with-riboflavin-and-uva-in-rat-cornea
#12
Yirui Zhu, Peter S Reinach, Hanlei Zhu, Qiufan Tan, Qinxiang Zheng, Jia Qu, Wei Chen
Corneal collagen cross-linking (CXL) halts human corneal ectasias progression by increasing stromal mechanical stiffness. Although some reports describe that this procedure is effective in dealing with some infectious and immunologic corneal thinning diseases, there is a need for more animal models whose corneal thickness more closely resemble those occurring in these patients. To meet this need, we describe here high-intensity protocols that are safe and effective for obtaining CXL in rat corneas. Initially, a range of potentially effective UVA doses were evaluated based on their effectiveness in increasing tissue enzymatic resistance to dissolution...
2017: PloS One
https://www.readbyqxmd.com/read/28644845/lipo-pge1-suppresses-collagen-production-in-human-dermal-fibroblasts-via-the-erk-ets-1-signaling-pathway
#13
Yoolhee Yang, Hee Jung Kim, Kyong-Je Woo, Daeho Cho, Sa Ik Bang
Dysregulation of collagen production contributes to various pathological processes, including tissue fibrosis as well as impaired wound healing. Lipo-prostaglandin E1 (Lipo-PGE1), a lipid microsphere-incorporated prostaglandin E1, is used as a vasodilator for the treatment of peripheral vascular diseases. Lipo-PGE1 was recently shown to enhance human dermal fibroblast (HDF) migration and in vivo wound healing. No published study has characterized the role of Lipo-PGE1 in collagen regulation in HDFs. Here, we investigated the cellular signaling mechanism by which Lipo-PGE1 regulates collagen in HDFs...
2017: PloS One
https://www.readbyqxmd.com/read/28642994/cardiovascular-magnetic-resonance-imaging-to-assess-myocardial-fibrosis-in-valvular-heart-disease
#14
Tomaz Podlesnikar, Victoria Delgado, Jeroen J Bax
The left ventricular (LV) remodeling process associated with significant valvular heart disease (VHD) is characterized by an increase of myocardial interstitial space with deposition of collagen and loss of myofibers. These changes occur before LV systolic function deteriorates or the patient develops symptoms. Cardiovascular magnetic resonance (CMR) permits assessment of reactive fibrosis, with the use of T1 mapping techniques, and replacement fibrosis, with the use of late gadolinium contrast enhancement...
June 22, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28642975/association-of-bone-metabolism-markers-with-coronary-atherosclerosis-and-coronary-artery-disease-in-postmenopausal-women
#15
Yan Ling, Zhen Wang, Bingjie Wu, Xin Gao
This study aimed to evaluate the association of bone metabolism markers with coronary atherosclerosis and coronary artery disease (CAD) in postmenopausal women. Based on the findings of coronary angiography, 111 women with CAD and 116 women without CAD were recruited. Serum calcium, phosphate, parathyroid hormone (PTH), 25-hydroxyvitamin D (25OHD), osteocalcin, N-terminal propeptide of type I procollagen (P1NP) and C-terminal cross-linked telopeptide of type I collagen (CTX) were measured. The Gensini score was used to assess the severity of coronary atherosclerosis...
June 22, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28642245/a-reporter-mouse-model-for-in-vivo-tracing-and-in-vitro-molecular-studies-of-melanocytic-lineage-cells-and-their-diseases
#16
Melissa Crawford, Valerie Leclerc, Lina Dagnino
Alterations in melanocytic lineage cells give rise to a plethora of distinct human diseases, including neurocristopathies, cutaneous pigmentation disorders, loss of vision and hearing, as well as melanoma. Understanding the ontogeny and biology of melanocytic cells, as well as how they interact with their surrounding environment, are key steps in the development of therapies for diseases that involve this cell lineage. Efforts to culture and characterize primary melanocytes from normal or genetically engineered mouse models have at times yielded contrasting observations...
June 22, 2017: Biology Open
https://www.readbyqxmd.com/read/28642243/anti-inflammatory-and-anti-osteoarthritis-effects-of-tectorigenin
#17
Cheng-Long Wang, De Li, Chuan-Dong Wang, Fei Xiao, Jun-Feng Zhu, Chao Shen, Bin Zuo, Yi-Min Cui, Hui Wang, Yuan Gao, Guo-Li Hu, Xiao-Ling Zhang, Xiao-Dong Chen
Osteoarthritis (OA) is a common and dynamic joint disease, including the articular cartilage, underlying bones, and synovium. In particular, OA is considered as the degeneration of the cartilage. Tectorigenin (Tec) can affect many biological processes. However, its effect on articular chondrocytes remains unclear. This study aimed to assess the role of Tec in articular cartilage. In vitro, Tec inhibited the expression levels of type X collagen, cyclooxigenase-2, matrix metalloproteinase (MMP)-3, and MMP-13 gene but enhanced those of Runx1, type II collagen, and aggrecan in the presence of IL-1β...
June 22, 2017: Biology Open
https://www.readbyqxmd.com/read/28642198/treatment-of-intestinal-fibrosis-in-experimental-inflammatory-bowel-disease-by-the-pleiotropic-actions-of-a-local-rho-kinase-inhibitor
#18
Tom Holvoet, Sarah Devriese, Karolien Castermans, Sandro Boland, Dirk Leysen, Yves-Paul Vandewynckel, Lindsey Devisscher, Lien Van den Bossche, Sophie Van Welden, Melissa Dullaers, Roosmarijn E Vandenbroucke, Riet De Rycke, Karel Geboes, Arnaud Bourin, Olivier Defert, Pieter Hindryckx, Martine De Vos, Debby Laukens
BACKGROUND: Intestinal fibrosis resulting in (sub)obstruction is a common complication of Crohn's disease (CD). Rho kinases (ROCKs) play multiple roles in TGFβ1-induced myofibroblast activation that could be therapeutic targets. Because systemic ROCK inhibition causes cardiovascular side-effects, we evaluated the effects of a locally acting ROCK inhibitor (AMA0825) on intestinal fibrosis. METHODS: Fibrosis was assessed in mouse models using dextran sulfate sodium and adoptive T cell transfer...
June 19, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28642129/fucoxanthin-inhibits-profibrotic-protein-expression-in-vitro-and-attenuates-bleomycin-induced-lung-fibrosis-in-vivo
#19
Sun Young Ma, Won Sun Park, Dae-Sung Lee, Grace Choi, Mi-Jin Yim, Jeong Min Lee, Won-Kyo Jung, Sae Gwang Park, Su-Kil Seo, Sung Jae Park, Il Yong Han, Yung Hyun Choi, Il-Whan Choi
Pulmonary fibrosis, a potentially fatal disease, results from acute and chronic interstitial lung diseases. Fucoxanthin (Fx), a carotenoid found in brown seaweed, shows a wide range of pharmacological activities. In this study, we investigated the antifibrotic effects of fucoxanthin and their underlying molecular mechanisms in transforming growth factor-beta1 (TGF-β1)-stimulated human pulmonary fibroblasts (HPFs). Thus, the effects of Fx on TGF-β1-induced expression of fibrotic factors, such as alpha-smooth muscle actin (α-SMA), type 1 collagen, fibronectin, and interleukin-6 (IL-6), in HPFs were investigated...
June 19, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28642013/identifying-mechanisms-driving-formation-of-granuloma-associated-fibrosis-during-mycobacterium-tuberculosis-infection
#20
Hayley C Warsinske, Robert M DiFazio, Jennifer J Linderman, JoAnne L Flynn, Denise E Kirschner
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), is a pulmonary pathogen of major global concern. A key feature of Mtb infection in primates is the formation of granulomas, dense cellular structures surrounding infected lung tissue. These structures serve as the main site of host-pathogen interaction in TB, and thus to effectively treat TB we must clarify mechanisms of granuloma formation and their function in disease. Fibrotic granulomas are associated with both good and bad disease outcomes...
June 19, 2017: Journal of Theoretical Biology
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