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https://www.readbyqxmd.com/read/28329568/localized-cutaneous-argyria-report-of-two-patients-and-literature-review
#1
Bryce David Beutler, Robert A Lee, Philip R Cohen
BackgroundLocalized cutaneous argyria is a rare skin condition caused by direct contact with silver or silver particles. It presents as asymptomatic gray or blue-gray macules that appear similar to blue nevi. Histologic features include brown-colored or black-colored silver granules in the basement membrane and dermis, most commonly surrounding eccrine glands, elastic fibers, and collagen fibrils. The condition is most frequently observed in individuals who are regularly exposed to small silver particles, such as silversmiths and welders...
November 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28328100/smart-mechanosensing-machineries-enable-migration-of-vascular-smooth-muscle-cells-in-atherosclerosis-relevant-3d-matrices
#2
REVIEW
Qingjia Chi, Jieling Shan, Xiaorong Ding, Tieying Yin, Yazhou Wang, Dongyu Jia, Guixue Wang
At the early stage of atherosclerosis, neointima is formed due to the migration of vascular smooth muscle cells (VSMCs) from the media to the intima. VSMCs are surrounded by highly adhesive 3D matrices. They take specific strategies to cross various 3D matrices in the media, including heterogeneous collagen and mechanically-strong basement membrane. Migration of VSMCs is potentially caused by biomechanical mechanism. Most in vitro studies focus on cell migration on 2D substrates in response to biochemical factors...
March 22, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28326083/the-small-tellurium-compound-as101-ameliorates-rat-crescentic-glomerulonephritis-association-with-inhibition-of-macrophage-caspase-1-activity-via-very-late-antigen-4-inactivation
#3
Yafit Hachmo, Yona Kalechman, Itai Skornick, Uzi Gafter, Rachel R Caspi, Benjamin Sredni
Crescentic glomerulonephritis (CGN) is the most aggressive form of GN and, if untreated, patients can progress to end-stage renal failure within weeks of presentation. The α4β1 integrin very late antigen-4 (VLA-4) is an adhesion molecule of fundamental importance to the recruitment of leukocytes in inflammation. We addressed the role of VLA-4 in mediating progressive renal injury in a rat model of CGN using a small tellurium compound. AS101 [ammonium trichloro(dioxoethylene-o,o')tellurate]. This compound has been previously shown to uniquely inhibit VLA-4 activity by redox inactivation of adjacent thiols in the exofacial domain of VLA-4...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28325925/the-blood-labyrinthine-barrier-in-the-human-normal-and-meniere-s-disease-macula-utricle
#4
Gail Ishiyama, Ivan A Lopez, Paul Ishiyama, Harry V Vinters, Akira Ishiyama
The ultrastructural organization of the blood labyrinthine barrier (BLB) was investigated in the human vestibular endorgan, the utricular macula, using postmortem specimens from individuals with documented normal auditory and vestibular function and surgical specimens from patients with intractable Meniere's disease. Transmission electron microscopic analysis of capillaries located in the normal human utricular stroma showed vascular endothelial cells with few pinocytotic vesicles, covered by a smooth and uniform basement membrane surrounded by pericyte processes...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28324731/basement-membranes
#5
Ranjay Jayadev, David R Sherwood
Basement membranes (BMs) are thin, dense sheets of specialized, self-assembled extracellular matrix that surround most animal tissues (Figure 1, top). The emergence of BMs coincided with the origin of multicellularity in animals, suggesting that they were essential for the formation of tissues. Their sheet-like structure derives from two independent polymeric networks - one of laminin and one of type IV collagen (Figure 1, bottom). These independent collagen and laminin networks are thought to be linked by several additional extracellular matrix proteins, including nidogen and perlecan (Figure 1, bottom)...
March 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28323988/basement-membrane-laminin-%C3%AE-2-regulates-btb-dynamics-via-its-effects-on-f-actin-and-microtubule-mt-cytoskeletons-via-mtorc1-signaling
#6
Ying Gao, Haiqi Chen, Wing-Yee Lui, Will M Lee, C Yan Cheng
A local axis connects the apical ectoplasmic specialization (apical ES) at the Sertoli-spermatid interface, the basal ES at the blood-testis barrier (BTB), and the basement membrane across the seminiferous epithelium functionally in rat testes. As such, cellular events that take place across the epithelium such as spermiation and BTB remodeling that occur at the apical ES and the basal ES, respectively, at stage VIII of the cycle are coordinated. Herein, laminin α2, a structural component of the basement membrane, was found to regulate BTB dynamics...
January 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28317948/local-remodeling-of-synthetic-extracellular-matrix-microenvironments-by-co-cultured-endometrial-epithelial-and-stromal-cells-enables-long-term-dynamic-physiological-function
#7
Christi D Cook, Abby S Hill, Margaret Guo, Linda Stockdale, Julia P Papps, Keith B Isaacson, Douglas A Lauffenburger, Linda G Griffith
Mucosal barrier tissues, comprising a layer of tightly-bonded epithelial cells in intimate molecular communication with an underlying matrix-rich stroma containing fibroblasts and immune cells, are prominent targets for drugs against infection, chronic inflammation, and other disease processes. Although human in vitro models of such barriers are needed for mechanistic studies and drug development, differences in extracellular matrix (ECM) needs of epithelial and stromal cells hinder efforts to create such models...
March 20, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28314809/goodpasture-s-disease-with-late-presentation-of-renal-abnormality-and-anti-gbm-autoantibody
#8
Emily Ann Boardman, Sameira Sohail, Rajesh Yadavilli
Goodpasture's disease without circulating autoantibodies is a rare presentation of a rare diagnosis. We present the case of a man aged 17 years who had 3 hospital admissions over a 2-month period with haemoptysis and shortness of breath. Throughout his first 2 admissions, his renal function was normal and anti-glomerular basement membrane (GBM) antibodies were negative. CT pulmonary angiogram during his second admission revealed florid and diffuse alveolar infiltrates. However, high-resolution CT chest performed 4 weeks later showed complete resolution of these changes...
March 17, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28300888/vancomycin-associated-linear-iga-disease-mimicking-toxic-epidermal-necrolysis
#9
Amanda Regio Pereira, Luis Henrique Barbizan de Moura, Jhonatan Rafael Siqueira Pinheiro, Victor Pavan Pasin, Milvia Maria Simões E Silva Enokihara, Adriana Maria Porro
Linear IgA dermatosis is a rare subepidermal autoimmune blistering disease characterized by linear deposition of IgA along the basement membrane zone. In the last three decades, many different drugs have been associated with the drug-induced form of the disease, especially vancomycin. We report a case of vancomycin-induced linear IgA disease mimicking toxic epidermal necrolysis. The aim of this work is to emphasize the need to include this differential diagnosis in cases of epidermal detachment and to review the literature on the subject and this specific clinical presentation...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28300675/the-morphofunctional-changes-in-the-wall-of-varicose-veins
#10
Jeļena Birdina, Māra Pilmane, Artūrs Ligers
INTRODUCTION: Varicose vein (VV) disease is a frequently occurring pathology of the lower extremities. Although the pathogenesis of varicosity development is not clearly defined, the final common pathway leading to chronic venous insufficiency is the development of venous hypertension, which is associated with severe changes in the venous wall. The aim of this study was to clarify the histological and immunohistochemical changes in great saphenous veins in chronic venous insufficiency...
March 11, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28299744/a-simple-adaptable-blood-brain-barrier-cell-model-for-screening-matrix-metalloproteinase-inhibitor-functionality
#11
Jennifer S Myers, Joan Hare, Qing-Xiang Amy Sang
The blood-brain barrier is a multicellular and basement membrane unit that regulates molecular transport between the blood and central nervous system. Many cerebral pathologies, such as acute stroke and chronic vascular dementia, result in a disrupted blood-brain barrier, increasing its permeability and allowing the entry of potentially neurotoxic molecules. The activation of matrix metalloproteinases mediates further blood-brain barrier damage. The inhibition of matrix metalloproteinases is a potential strategy for stroke therapy...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28298336/moonlighting-glycolytic-protein-glyceraldehyde-3-phosphate-dehydrogenase-gapdh-an-evolutionarily-conserved-plasminogen-receptor-on-mammalian-cells
#12
Anoop Singh Chauhan, Manoj Kumar, Surbhi Chaudhary, Anil Patidar, Asmita Dhiman, Navdeep Sheokand, Himanshu Malhotra, Chaaya Iyengar Raje, Manoj Raje
Prokaryotic pathogens establish infection in mammals by capturing the proteolytic enzyme plasminogen (Plg) onto their surface to digest host extracellular matrix (ECM). One of the bacterial surface Plg receptors is the multifunctional glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH). In a defensive response, the host mounts an inflammatory response, which involves infiltration of leukocytes to sites of inflammation. This requires macrophage exit from the blood and migration across basement membranes, a phenomenon dependent on proteolytic remodeling of the ECM utilizing Plg...
March 15, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28296059/the-pathogenicity-of-t-cell-epitopes-on-human-goodpasture-antigen-and-its-critical-amino-acid-motif
#13
Shui-Yi Hu, Qiu-Hua Gu, Jia Wang, Miao Wang, Xiao-Yu Jia, Zhao Cui, Ming-Hui Zhao
Goodpasture antigen, the non-collagenous domain of α3 chain of type IV collagen [α3(IV)NC1], is the target antigen of anti-glomerular basement membrane (GBM) antibodies. The pathogenicity of T cell epitopes is not elucidated clearly. In this study, we aim to define the nephritogenic T cell epitopes and its critical amino acid residues. Twenty-four overlapping linear peptides were synthesized covering the whole sequence of human α3(IV)NC1. Wistar-Kyoto rats were immunized with linear peptides, and experimental autoimmune glomerulonephritis was evaluated...
March 10, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28293634/secs-sinusoidal-endothelial-cells-liver-microenvironment-and-fibrosis
#14
REVIEW
Vaishaali Natarajan, Edward N Harris, Srivatsan Kidambi
Liver fibrosis is a wound-healing response to chronic liver injury such as alcoholic/nonalcoholic fatty liver disease and viral hepatitis with no FDA-approved treatments. Liver fibrosis results in a continual accumulation of extracellular matrix (ECM) proteins and paves the way for replacement of parenchyma with nonfunctional scar tissue. The fibrotic condition results in drastic changes in the local mechanical, chemical, and biological microenvironment of the tissue. Liver parenchyma is supported by an efficient network of vasculature lined by liver sinusoidal endothelial cells (LSECs)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28293414/galectin-3-an-early-predictive-biomarker-of-modulation-of-airway-remodeling-in-patients-with-severe-asthma-treated-with-omalizumab-for-36%C3%A2-months
#15
Anna Maria Riccio, Pierluigi Mauri, Laura De Ferrari, Rossana Rossi, Dario Di Silvestre, Louise Benazzi, Alessandra Chiappori, Roberto Walter Dal Negro, Claudio Micheletto, Giorgio Walter Canonica
BACKGROUND: Bronchial asthma is a heterogeneous disease characterized by three cardinal features: chronic inflammation, variable airflow obstruction, and airway hyperresponsiveness. Asthma has traditionally been defined using nonspecific clinical and physiologic variables that encompass multiple phenotypes and are treated with nonspecific anti-inflammatory therapies. Based on the modulation of airway remodeling after 12 months of anti-immunoglobulin E (IgE) treatment, we identified two phenotypes (omalizumab responder, OR; and non-omalizumab responder, NOR) and performed morphometric analysis of bronchial biopsy specimens...
2017: Clinical and Translational Allergy
https://www.readbyqxmd.com/read/28292386/histopathological-changes-in-arsenic-kushta-induced-nephrotoxicity-in-wistar-rats
#16
(no author information available yet)
OBJECTIVE: To determine the nephrotoxic effects of arsenic kushta (Kushta Sam-ul-Far) in Wistar rats. STUDY DESIGN: Experimental study. PLACE AND DURATION OF STUDY: Department of Morbid Anatomy and Histopathology, University of Health Sciences, Lahore from May to August 2014. METHODOLOGY: This experimental study was conducted on 48 healthy Wistar rats, each weighing 200 - 250 grams. The rats were randomly divided into 4 experimental groups each containing 12 rats...
February 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28289267/dual-role-of-pericyte-%C3%AE-6%C3%AE-1-integrin-in-tumour-blood-vessels
#17
Louise E Reynolds, Gabriela D'Amico, Tanguy Lechertier, Alexandros Papachristodoulou, José M Muñoz-Félix, Adèle De Arcangelis, Marianne Baker, Bryan Serrels, Kairbaan M Hodivala-Dilke
The integrin α6β1 is a major laminin receptor, and formation of a laminin-rich basement membrane is a key feature in tumour blood vessel stabilisation and pericyte recruitment; processes that are important in the growth and maturation of tumour blood vessels. However, the role of pericyte α6β1-integrin in angiogenesis is largely unknown. We developed mice where the α6-integrin subunit is deleted in pericytes and examined tumour angiogenesis and growth. These mice had: i) reduced pericyte coverage of tumour blood vessels; ii) reduced tumour blood vessel stability; iii) increased blood vessel diameter; iv) enhanced leakiness and, v) abnormal blood vessel basement membrane architecture...
March 13, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28288898/oral-administration-of-corticosterone-at-stress-like-levels-drives-microglial-but-not-vascular-disturbances-post-stroke
#18
Katarzyna Zalewska, Lin Kooi Ong, Sarah J Johnson, Michael Nilsson, Frederick R Walker
Exposure to chronic stress following stroke has been shown, both clinically and pre-clinically, to impact negatively on the recovery process. While this phenomenon is well established, the specific mechanisms involved have remained largely unexplored. One obvious signalling pathway through which chronic stress may impact on the recovery process is via corticosterone, and its effects on microglial activity and vascular remodelling. In the current study, we were interested in examining how orally delivered corticosterone at stress-like concentration impacted on microglial activity and vascular remodelling after stroke...
March 10, 2017: Neuroscience
https://www.readbyqxmd.com/read/28288037/xp11-translocation-renal-cell-carcinomas-rccs-with-rbm10-tfe3-gene-fusion-demonstrating-melanotic-features-and-overlapping-morphology-with-t-6-11-rcc-interest-and-diagnostic-pitfall-in-detecting-a-paracentric-inversion-of-tfe3
#19
Qiu-Yuan Xia, Xiao-Tong Wang, Xue-Mei Zhan, Xiao Tan, Hao Chen, Yi Liu, Shan-Shan Shi, Xuan Wang, Xue Wei, Sheng-Bing Ye, Rui Li, Heng-Hui Ma, Zhen-Feng Lu, Xiao-Jun Zhou, Qiu Rao
Xp11 translocation renal cell carcinomas (RCC) are characterized by several different translocations involving the TFE3 gene. Tumors with different specific gene fusions may have different clinicopathologic manifestations. Only 3 RBM10-TFE3 RCCs have been reported to date. Here, we added 4 cases of this rare type of tumors with clinicopathologic, immunohistochemical, molecular, and ultrastructural analyses. Most tumors had similar patterns with mixed architectures as follows: acinar, tubular and papillary patterns of epithelioid cells combined with sheets of small cells with "pseudorosette-like" architectures, mimicking the typical morphology of t(6;11) RCC...
March 10, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28287550/forskolin-induced-swelling-in-intestinal-organoids-an-in-vitro-assay-for-assessing-drug-response-in-cystic-fibrosis-patients
#20
Sylvia F Boj, Annelotte M Vonk, Marvin Statia, Jinyi Su, Robert R G Vries, Jeffrey M Beekman, Hans Clevers
Recently-developed cystic fibrosis transmembrane conductance regulator (CFTR)-modulating drugs correct surface expression and/or function of the mutant CFTR channel in subjects with cystic fibrosis (CF). Identification of subjects that may benefit from these drugs is challenging because of the extensive heterogeneity of CFTR mutations, as well as other unknown factors that contribute to individual drug efficacy. Here, we describe a simple and relatively rapid assay for measuring individual CFTR function and response to CFTR modulators in vitro...
February 11, 2017: Journal of Visualized Experiments: JoVE
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