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https://www.readbyqxmd.com/read/27911382/a-simple-mechanical-procedure-to-create-limbal-stem-cell-deficiency-in-mouse
#1
Neda Afsharkhamseh, Elham Ghahari, Medi Eslani, Ali R Djalilian
Limbal stem cell deficiency (LSCD) is a state of malfunction or loss of limbal epithelial stem cells, after which the corneal epithelium is replaced with conjunctiva. Patients suffer from recurrent corneal defects, pain, inflammation, and loss of vision. Previously, a murine model of LSCD was described and compared to two other models. The goal was to produce a consistent mouse model of LSCD that both mimics the phenotype in humans and lasts long enough to make it possible to study the disease pathophysiology and to evaluate new treatments...
November 17, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27906681/sirna-mediated-suppression-of-collagen-type-iv-alpha-2-col4a2-mrna-inhibits-triple-negative-breast-cancer-cell-proliferation-and-migration
#2
He Jing Song, Guan Hong, Jianbo Yang, Zheng Duo, Fu Li, Chen Wei Cai, Luo Xue Ying, Mao You Sheng, Ou Yang YiWen, Pan Yue, Chang Zou
Triple-negative breast cancer (TNBC) is more aggressive than other breast cancer subtypes. Collagen type IV alpha 2 (COL4A2), a major component of the basement membrane, dynamically influences a wide range of biological processes, including cancer pathogenesis and progression. This study evaluated the effects of COL4A2 siRNA delivered by lentiviral vector to TNBC cells. COL4A2 siRNA lenti-viral vector was constructed and transfected into MDA-MB-231 and MDA-MB-468 cells. The COL4A2 mRNA levels were quantified by RT-PCR...
November 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/27904025/early-raas-blockade-exerts-renoprotective-effects-in-autosomal-recessive-alport-syndrome
#3
Nao Uchida, Naonori Kumagai, Kandai Nozu, Xue Jun Fu, Kazumoto Iijima, Yoshiaki Kondo, Shigeo Kure
Alport syndrome is a progressive renal disease caused by mutations in COL4A3, COL4A4, and COL4A5 genes that encode collagen type IV alpha 3, alpha 4, and alpha 5 chains, respectively. Because of abnormal collagen chain, glomerular basement membrane becomes fragile and most of the patients progress to end-stage renal disease in early adulthood. COL4A5 mutation causes X-linked form of Alport syndrome, and two mutations in either COL4A3 or COL4A4 causes an autosomal recessive Alport syndrome. Recently, renin-angiotensin-aldosterone system (RAAS) blockade has been shown to attenuate effectively disease progression in Alport syndrome...
2016: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27901020/structural-decoding-of-netrin-4-reveals-a-regulatory-function-towards-mature-basement-membranes
#4
Raphael Reuten, Trushar R Patel, Matthew McDougall, Nicolas Rama, Denise Nikodemus, Benjamin Gibert, Jean-Guy Delcros, Carina Prein, Markus Meier, Stéphanie Metzger, Zhigang Zhou, Jennifer Kaltenberg, Karen K McKee, Tobias Bald, Thomas Tüting, Paola Zigrino, Valentin Djonov, Wilhelm Bloch, Hauke Clausen-Schaumann, Ernst Poschl, Peter D Yurchenco, Martin Ehrbar, Patrick Mehlen, Jörg Stetefeld, Manuel Koch
Netrins, a family of laminin-related molecules, have been proposed to act as guidance cues either during nervous system development or the establishment of the vascular system. This was clearly demonstrated for netrin-1 via its interaction with the receptors DCC and UNC5s. However, mainly based on shared homologies with netrin-1, netrin-4 was also proposed to play a role in neuronal outgrowth and developmental/pathological angiogenesis via interactions with netrin-1 receptors. Here, we present the high-resolution structure of netrin-4, which shows unique features in comparison with netrin-1, and show that it does not bind directly to any of the known netrin-1 receptors...
November 30, 2016: Nature Communications
https://www.readbyqxmd.com/read/27899391/atypical-presentation-of-anti-gbm-nephritis-in-a-90-year-old-patient
#5
Julie Omolola Okiro, Chaudhry Adeel Ebad, Amjad Zaman Khan
A 90-year-old woman who had bloody diarrhoea, nausea, weakness and reduced urine output was found to have acute kidney injury. Her inflammatory markers were raised and her chest X-ray suggested an inflammatory process. She was initially suspected to have acute kidney injury secondary to dehydration and sepsis but when her autoimmune screen returned positive for antiglomerular basement membrane antibodies our diagnosis and management strategy was reconsidered. This is a case report of Goodpasture disease presenting in an elderly patient...
November 29, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27899041/electromagnetic-and-electrohydraulic-shock-wave-lithotripsy-induced-urothelial-damage-is-there-a-difference
#6
Mahmoud Mustafa, Honood Aburas, Fatema Helo, Laila Qarawi
PURPOSE: To evaluate and compare the acute effect of electromagnetic and electrohydraulic extracorporeal shock wave lithotripsy (SWL) on the urothelial layers of kidney and ureter. MATERIALS AND METHODS: Fifty patients (29 males (58%), 21 females (42%), with average age 51.68 years (range: 37-70) who underwent SWL application in two different centers were included. Twenty-eight patients (56%) were treated with electrohydraulic and 22 (44%) were treated with electromagnetic lithotripsy...
November 29, 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27896391/histological-aspects-of-the-fixed-particle-model-of-stone-formation-animal-studies
#7
REVIEW
Saeed R Khan
Crystallization by itself is not harmful as long as the crystals are not retained in the kidneys and are allowed to pass freely down the renal tubules to be excreted in the urine. A number of theories have been proposed, and studies performed, to determine the mechanisms involved in crystal retention within the kidneys. It has been suggested that urinary transit through the nephron is too fast for crystals to grow large enough to be retained. Thus, free particle mechanism alone cannot lead to stone formation, and there must be a mechanism for crystal fixation within the kidneys...
November 28, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27896299/basement-membrane-ultrastructure-and-component-localization-data-from-uterine-tissues-during-early-mouse-pregnancy
#8
Celestial R Jones-Paris, Sayan Paria, Taloa Berg, Juan Saus, Gautam Bhave, Bibhash C Paria, Billy G Hudson
Basement membranes (BMs) are specialized extracellular scaffolds that provide architecture and modulate cell behaviors in tissues, such as fat, muscle, endothelium, endometrium, and decidua. Properties of BMs are maintained in homeostasis for most adult tissues. However, BM ultrastructure, composition, and localization are rapidly altered in select uterine tissues that are reprogrammed during pregnancy to enable early maternal-embryo interactions. Here, our data exhibit both static and dynamic BMs that were tracked in mouse uterine tissues during pre-, peri-, and postimplantation periods of pregnancy...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27896222/67-kda-laminin-receptor-67lr-in-normal-and-neoplastic-hematopoietic-cells-is-its-targeting-a-feasible-approach
#9
Nunzia Montuori, Ada Pesapane, Valentina Giudice, Bianca Serio, Francesca W Rossi, Amato De Paulis, Carmine Selleri
The 67 kDa laminin receptor (67LR) is a non-integrin cell surface receptor for laminin (LM) that derives from a 37 kDa precursor (37LRP). 67LR expression is increased in neoplastic cells and correlates with an enhanced invasive and metastatic potentialin many human solid tumors, recommending this receptor as a new promising target for cancer therapy. This is supported by in vivo studies showing that 67LR downregulation reduces tumour cell proliferation and tumour formation by inducing apoptosis. 67LR association with the anti-apoptotic protein PED/PEA-15 activates a signal transduction pathway, leading to cell proliferation and resistance to apoptosis...
November 2016: Translational Medicine @ UniSa
https://www.readbyqxmd.com/read/27895300/thsd1-thrombospondin-type-1-domain-containing-protein-1-mutation-in-the-pathogenesis-of-intracranial-aneurysm-and-subarachnoid-hemorrhage
#10
Teresa Santiago-Sim, Xiaoqian Fang, Morgan L Hennessy, Stephen V Nalbach, Steven R DePalma, Ming Sum Lee, Steven C Greenway, Barbara McDonough, Georgene W Hergenroeder, Kyla J Patek, Sarah M Colosimo, Krista J Qualmann, John P Hagan, Dianna M Milewicz, Calum A MacRae, Susan M Dymecki, Christine E Seidman, J G Seidman, Dong H Kim
BACKGROUND AND PURPOSE: A ruptured intracranial aneurysm (IA) is the leading cause of a subarachnoid hemorrhage. This study seeks to define a specific gene whose mutation leads to disease. METHODS: More than 500 IA probands and 100 affected families were enrolled and clinically characterized. Whole exome sequencing was performed on a large family, revealing a segregating THSD1 (thrombospondin type 1 domain containing protein 1) mutation. THSD1 was sequenced in other probands and controls...
December 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27894405/inhibition-of-matrix-metalloproteins-9-attenuated-candida-albicans-induced-inflammation-in-mouse-cornea
#11
C Dong, M G Yang
Since the severe corneal ulceration of mouse cornea is known to occur with inflammation. As one of imperative matrix metalloproteinase, the potential roles of matrix metalloproteins 9 (MMP9) in corneal ulceration and keratitis are still unveiled caused by fungal invasion. In this study, Candida albicans (CA) inoculated wild-type KM mice cornea was used as a model pathogen in corneal inflammation.  CA invasion significantly stimulated the expression of collagen IV and MMP9 detected by RT-PCR, Real-time PCR and Immunofluorescent staining in mouse cornea as soon as 6 hours post infection, and relatively decreased at 1 day post infection...
October 31, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27889928/elucidating-the-role-of-cyclooxygenase-2-in-the-pathogenesis-of-oral-lichen-planus-an-immunohistochemical-study-with-supportive-histochemical-analysis
#12
Pratyush Singh, Jasleen Grover, Aditi Amit Byatnal, Vasudeva Guddattu, Raghu Radhakrishnan, Monica Charlotte Solomon
OBJECTIVE: Oral lichen planus (OLP) is a chronic, inflammatory disorder that affects the oral mucous membrane. During an inflammatory response, several chemokines and cytokines are released by the cells of the immune system. Activation of MMPs, along with mast cell-derived chymase and tryptase, degrades the basement membrane structural proteins, resulting in basement membrane breaks. AIM: To investigate the association between the COX-2 expressions, presence of intact or degranulating mast cells within the connective tissue and the extent of basement membrane discontinuity in OLP cases...
November 7, 2016: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/27886553/mechanical-stress-regulates-transport-in-a-compliant-3d-model-of-the-blood-brain-barrier
#13
Paul P Partyka, George A Godsey, John R Galie, Mary C Kosciuk, Nimish K Acharya, Robert G Nagele, Peter A Galie
Transport of fluid and solutes is tightly controlled within the brain, where vasculature exhibits a blood-brain barrier and there is no organized lymphatic network facilitating waste transport from the interstitial space. Here, using a compliant, three-dimensional co-culture model of the blood-brain barrier, we show that mechanical stimuli exerted by blood flow mediate both the permeability of the endothelial barrier and waste transport along the basement membrane. Application of both shear stress and cyclic strain facilitates tight junction formation in the endothelial monolayer, with and without the presence of astrocyte endfeet in the surrounding matrix...
November 17, 2016: Biomaterials
https://www.readbyqxmd.com/read/27884116/kidney-disease-in-the-elderly-biopsy-based-data-from-14-renal-centers-in-poland
#14
Agnieszka Perkowska-Ptasinska, Dominika Deborska-Materkowska, Artur Bartczak, Tomasz Stompor, Tomasz Liberek, Barbara Bullo-Piontecka, Anna Wasinska, Agnieszka Serwacka, Marian Klinger, Jolanta Chyl, Michal Kuriga, Robert Malecki, Krzysztof Marczewski, Bogdan Hryniewicz, Tadeusz Gregorczyk, Monika Wieliczko, Stanislaw Niemczyk, Olga Rostkowska, Leszek Paczek, Magdalena Durlik
BACKGROUND: Longer life expectancy is associated with an increasing prevalence of kidney disease. Aging itself may cause renal damage, but the spectrum of kidney disorders that affect elderly patients is diverse. Few studies, mostly form US, Asia and West Europe found differences in the prevalence of some types of kidney diseases between elderly and younger patients based on renal biopsy findings, with varied proportion between glomerulopathies and arterionephrosclerosis as a dominant injury found...
November 25, 2016: BMC Nephrology
https://www.readbyqxmd.com/read/27882813/dietary-zinc-modifies-diabetic-induced-renal-pathology-in-rats
#15
Wael M Elsaed, Hazem Abdelhamid Mohamed
This study was conducted to investigate how far dietary zinc (Zn) modifies the histomorphological alterations induced by diabetes in rat kidneys. The animals were divided into negative control group (10 rats). Diabetes was induced in thirty animals by streptozotocin. After confirming diabetes, the animals were divided into three groups (n = 10). Group II served as the positive control group (fed on standard diet), group III was fed on Zn deficient diet, and group IV was fed on Zn supplemented diet. Caspase-3 immune staining was used to estimate the caspase activity...
November 24, 2016: Renal Failure
https://www.readbyqxmd.com/read/27880891/a-novel-3d-in%C3%A2-vitro-metastasis-model-elucidates-differential-invasive-strategies-during-and-after-breaching-basement-membrane
#16
Asja Guzman, Víctor Sánchez Alemany, Yen Nguyen, Catherine Ruiqi Zhang, Laura J Kaufman
Invasive breast cancer and other tumors of epithelial origin must breach a layer of basement membrane (BM) that surrounds the primary tumor before invading into the adjacent extracellular matrix. To analyze invasive strategies of breast cancer cells during BM breaching and subsequent invasion into a collagen I-rich extracellular matrix (ECM), we developed a physiologically relevant 3D in vitro model that recreates the architecture of a solid tumor with an intact, degradable, cell-assembled BM layer embedded in a collagen I environment...
November 15, 2016: Biomaterials
https://www.readbyqxmd.com/read/27878870/epidermolysis-bullosa-simplex-in-sibling-eurasier-dogs-is-caused-by-a-plec-non-sense-variant
#17
Elizabeth A Mauldin, Ping Wang, Thierry Olivry, Paula S Henthorn, Margret L Casal
BACKGROUND: Plectin, a large linker protein found in many tissues, acts to connect components of the cytoskeleton to each other. In the epidermis, plectin binds keratin intermediate filaments to hemidesmosomes. A deficiency of plectin in the skin leads to blister formation in the basal layer and the disease epidermolysis bullosa simplex (EBS). HYPOTHESIS/OBJECTIVES: To describe a novel blistering disease that arose spontaneously in a litter of puppies. ANIMALS: Two female and one male 20-day-old Eurasier puppies, from a litter of six, were presented for evaluation of failure to thrive and then euthanized due to poor prognosis...
November 7, 2016: Veterinary Dermatology
https://www.readbyqxmd.com/read/27878477/paraneoplastic-pemphigus-and-autoimmune-blistering-diseases-associated-with-neoplasm-characteristics-diagnosis-associated-neoplasms-proposed-pathogenesis-treatment
#18
REVIEW
Saritha Kartan, Vivian Y Shi, Ashley K Clark, Lawrence S Chan
Autoimmune paraneoplastic and neoplasm-associated skin syndromes are characterized by autoimmune-mediated cutaneous lesions in the presence of a neoplasm. The identification of these syndromes provides information about the underlying tumor, systemic symptoms, and debilitating complications. The recognition of these syndromes is particularly helpful in cases of skin lesions presenting as the first sign of the malignancy, and the underlying malignancy can be treated in a timely manner. Autoimmune paraneoplastic and neoplasm-associated bullous skin syndromes are characterized by blister formation due to an autoimmune response to components of the epidermis or basement membrane in the context of a neoplasm...
November 22, 2016: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/27874879/bullous-pemphigoid-associated-with-a-lymphoepithelial-cyst-of-the-pancreas
#19
Preston W Chadwick, Francis R Spitz, Daniel M Kwa, Waine C Johnson, Warren R Heymann
Bullous pemphigoid (BP) is an acquired, autoimmune, subepidermal blistering disorder. A possible paraneoplastic association has been suggested; however, debate remains regarding the precise relationship of these neoplasms with BP. We present a case of recalcitrant BP in a 67-year-old man with a pancreatic neoplasm that was found to be a lymphoepithelial cyst. Immunoperoxidase staining of the cyst demonstrated C3d along the basement membrane of the stratified squamous epithelium, suggesting that the BP may have involved the lymphoepithelial cyst itself...
October 2016: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/27872767/diffuse-alveolar-hemorrhage-associated-with-edoxaban-therapy
#20
Kenichi Nitta, Hiroshi Imamura, Akihiro Yashio, Satoko Kashima, Katsunori Mochizuki
Introduction. The main adverse effect of anticoagulant therapy is bleeding, and major bleeding, including intracranial, gastrointestinal, and retroperitoneal bleeding, has been reported as an adverse effect of edoxaban, a direct oral anticoagulant (DOAC). Bleeding during systemic anticoagulation with edoxaban presents a therapeutic conundrum, because there is currently no safe or efficacious reversal agent to stop major bleeding. Case Report. A 51-year-old woman had multiple traumatic injuries, including lower limb fractures...
2016: Case Reports in Critical Care
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