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https://www.readbyqxmd.com/read/29677463/a-role-for-collagen-iv-in-cardiovascular-disease
#1
Lasse Bach Steffensen, Lars M Rasmussen
Over the past decade, studies have repeatedly found single nucleotide polymorphisms located in the COL4A1 and COL4A2 genes to be associated with cardiovascular disease (CVD), and the 13q34 locus harboring these genes is one of approximately 160 genome-wide significant risk loci for coronary artery disease. COL4A1 and COL4A2 encode the ⍺1- and ⍺2-chains of collagen IV, a major component of basement membranes in various tissues including arteries. In spite of the growing body of evidence indicating a role for collagen IV in CVD, remarkably few studies aim at directly investigating such a role...
April 20, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29677186/morphophysiological-changes-in-the-splenic-extracellular-matrix-of-leishmania-infantum-naturally-infected-dogs-is-associated-with-alterations-in-lymphoid-niches-and-the-cd4-t-cell-frequency-in-spleens
#2
Aurea Virginia Andrade da Silva, Fabiano Borges Figueiredo, Rodrigo Caldas Menezes, Arthur Augusto Mendes-Junior, Luisa Helena Monteiro de Miranda, Elisa Cupolillo, Renato Porrozzi, Fernanda Nazaré Morgado
The spleen is one of the main affected organs in canine visceral leishmaniasis (CVL). Disorganization of the splenic white pulp (SWP) has been associated with immunosuppression and disease progression. This study aims to assess structural and cellular changes in the splenic extracellular matrix of dogs with CVL, correlating these changes with the parasite load and clinical signs. Splenic fragments were collected from 41 naturally infected animals for parasite load quantification by quantitative PCR, histopathological analysis and immunohistochemistry for CD3+, CD4+, and CD8+ T cells; CD21+ B cells; Ki-67+, IFN-γ+, and IL-10+ cells; and the MMP-9 and ADAM-10 enzymes...
April 20, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29677166/in-vitro-identification-of-new-transcriptomic-and-mirnomic-profiles-associated-with-pulmonary-fibrosis-induced-by-high-doses-everolimus-looking-for-new-pathogenetic-markers-and-therapeutic-targets
#3
Simona Granata, Gloria Santoro, Valentina Masola, Paola Tomei, Fabio Sallustio, Paola Pontrelli, Matteo Accetturo, Nadia Antonucci, Pierluigi Carratù, Antonio Lupo, Gianluigi Zaza
The administration of Everolimus (EVE), a mTOR inhibitor used in transplantation and cancer, is often associated with adverse effects including pulmonary fibrosis. Although the underlying mechanism is not fully clarified, this condition could be in part caused by epithelial to mesenchymal transition (EMT) of airway cells. To improve our knowledge, primary bronchial epithelial cells (BE63/3) were treated with EVE (5 and 100 nM) for 24 h. EMT markers (α-SMA, vimentin, fibronectin) were measured by RT-PCR. Transepithelial resistance was measured by Millicell-ERS ohmmeter...
April 20, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29676198/blockade-of-at1-type-receptors-for-angiotensin-ii-prevents-cardiac-microvascular-fibrosis-induced-by-chronic-stress-in-sprague-dawley-rats
#4
Lília Taddeo Firoozmand, Andrea Sanches, Nilsa Regina Damaceno-Rodrigues, Juliana Dinéia Perez, Danielle Sanches Aragão, Rodolfo Mattar Rosa, Fernanda Klein Marcondes, Dulce Elena Casarini, Elia Garcia Caldini, Tatiana Sousa Cunha
To test the effects of chronic-stress on the cardiovascular system, the model of chronic mild unpredictable stress (CMS) has been widely used. The CMS protocol consists of the random, intermittent, and unpredictable exposure of laboratory animals to a variety of stressors, during 3 consecutive weeks. In this study, we tested the hypothesis that exposure to the CMS protocol leads to left ventricle microcirculatory remodeling that can be attenuated by angiotensin II receptor blockade. Male Sprague-Dawley rats were randomly assigned into four groups: Control, Stress, Control + losartan, and Stress + losartan (N = 6, each group, losartan: 20 mg/kg/day)...
April 20, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29676157/high-throughput-assay-for-collagen-secretion-suggests-an-unanticipated-role-for-hsp90-in-collagen-production
#5
Madeline Y Wong, Ngoc Duc Doan, Andrew S DiChiara, Louis J Papa, Jaime H Cheah, Christian K Soule, Nicki Watson, John D Hulleman, Matthew D Shoulders
Collagen overproduction is a feature of fibrosis and cancer, while insufficient deposition of functional collagen molecules and/or the secretion of malformed collagen are common in genetic disorders like osteogenesis imperfecta. Collagen secretion is an appealing therapeutic target in these and other diseases, as secretion directly connects intracellular biosynthesis to collagen deposition and biological function in the extracellular matrix. However, small molecule and biological methods to tune collagen secretion are severely lacking...
April 20, 2018: Biochemistry
https://www.readbyqxmd.com/read/29676068/trpv1-blocking-alleviates-airway-inflammation-and-remodeling-in-a-chronic-asthma-murine-model
#6
Joon Young Choi, Hwa Young Lee, Jung Hur, Kyung Hoon Kim, Ji Young Kang, Chin Kook Rhee, Sook Young Lee
PURPOSE: Asthma is a chronic inflammatory airway disease characterized by airway hyperresponsiveness (AHR), inflammation, and remodeling. There is emerging interest in the involvement of the transient receptor potential vanilloid 1 (TRPV1) channel in the pathophysiology of asthma. This study examined whether TRPV1 antagonism alleviates asthma features in a murine model of chronic asthma. METHODS: BALB/c mice were sensitized to and challenged by ovalbumin to develop chronic asthma...
May 2018: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/29675769/cellular-and-molecular-meniscal-changes-in-the-degenerative-knee-a-review
#7
REVIEW
Mariano López-Franco, Enrique Gómez-Barrena
BACKGROUND: The important role of knee menisci to maintain adequate knee function is frequently impaired since early stages of knee joint degeneration. A better understanding of meniscal impairment may help the orthopaedic surgeon to orient the treatment of the degenerative knee. This review focuses on changes in meniscal cells and matrix when degeneration is in progress. MAIN BODY: Differences in the meniscal structure and metabolism have been investigated in the degenerative knee, both in experimental animal models and in surgical specimens...
April 19, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29675330/multispectral-analog-mean-delay-fluorescence-lifetime-imaging-combined-with-optical-coherence-tomography
#8
Hyeong Soo Nam, Woo Jae Kang, Min Woo Lee, Joon Woo Song, Jin Won Kim, Wang-Yuhl Oh, Hongki Yoo
The pathophysiological progression of chronic diseases, including atherosclerosis and cancer, is closely related to compositional changes in biological tissues containing endogenous fluorophores such as collagen, elastin, and NADH, which exhibit strong autofluorescence under ultraviolet excitation. Fluorescence lifetime imaging (FLIm) provides robust detection of the compositional changes by measuring fluorescence lifetime, which is an inherent property of a fluorophore. In this paper, we present a dual-modality system combining a multispectral analog-mean-delay (AMD) FLIm and a high-speed swept-source optical coherence tomography (OCT) to simultaneously visualize the cross-sectional morphology and biochemical compositional information of a biological tissue...
April 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29673759/alport-syndrome-and-pierson-syndrome-diseases-of-the-glomerular-basement-membrane
#9
REVIEW
Steven D Funk, Meei-Hua Lin, Jeffrey H Miner
The glomerular basement membrane (GBM) is an important component of the kidney's glomerular filtration barrier. Like all basement membranes, the GBM contains type IV collagen, laminin, nidogen, and heparan sulfate proteoglycan. It is flanked by the podocytes and glomerular endothelial cells that both synthesize it and adhere to it. Mutations that affect the GBM's collagen α3α4α5(IV) components cause Alport syndrome (kidney disease with variable ear and eye defects) and its variants, including thin basement membrane nephropathy...
April 16, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29672883/assessment-of-advanced-liver-fibrosis-and-the-risk-for-hepatic-decompensation-in-patients-with-congestive-hepatopathy
#10
REVIEW
Alexander Lemmer, Lisa B Van-Wagner, Daniel Ganger
Congestive hepatopathy (CH) arises from chronically elevated right sided heart pressures transmitted to the liver by passive venous congestion. Over time CH can lead to hepatic bridging fibrosis, decompensated cirrhosis, and hepatocellular carcinoma. Currently there are no evidence-based guidelines to direct appropriate screening or management of patients with CH partly because of the inability of current clinical tools (serum tests, imaging studies, liver stiffness measurements, and liver biopsy) to accurately estimate hepatic fibrosis or the risk for hepatic decompensation...
April 19, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29672662/fibrostenotic-phenotype-of-myofibroblasts-in-crohn-s-disease-is-dependent-on-tissue-stiffness-and-reversed-by-lox-inhibition
#11
Jessica R de Bruyn, Gijs R van den Brink, Jessica Steenkamer, Christianne J Buskens, Willem A Bemelman, Sander Meisner, Vanesa Muncan, Anje A Te Velde, Geert R D'Haens, Manon E Wildenberg
Background and Aims: Crohn's disease is a chronic inflammatory disorder of the intestine and often leads to fibrosis, characterized by excess extracellular matrix [ECM] deposition, increased tissue stiffness, and stricture formation. Here we evaluated the contribution of myofibroblast-ECM interactions to the development of intestinal fibrosis in Crohn's disease. Methods: Matched primary human myofibroblasts were isolated from stenotic, inflamed and normal-appearing small intestine within the same Crohn's disease patient [n = 10]...
April 16, 2018: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/29672438/alterations-of-inflammatory-and-matrix-production-indices-in-celiac-disease-with-low-bone-mass-on-long-term-gluten-free-diet
#12
Michele Di Stefano, Manuela Bergonzi, Irene Benedetti, Mara De Amici, Cristina Torre, Natascia Brondino, Emanuela Miceli, Elisabetta Pagani, Gian L Marseglia, Gino R Corazza, Antonio Di Sabatino
BACKGROUND: A clinically meaningful impairment of bone mass secondary to malabsorption is frequent in untreated celiac disease. In adult patients, a rigorous gluten-free diet (GFD) significantly improves, but does not always normalize, bone mineral density (BMD). The reason for this marginal response is unclear. Accordingly, we evaluated the role of both local and systemic factors for bone loss in celiac patients on long-term GFD. STUDY: In a prospective cohort, 22 patients with low lumbar and/or femoral BMD and 22 with normal BMD underwent bone and mineral metabolism evaluation: we tested calcium, phosphate, parathyroid hormone, and vitamin D; telopeptide of type I collagen, a bone resorption index; propeptide of type I procollagen, a bone neoformation index; receptor antagonist of NF-kB ligand, an osteoclast-stimulating factor; osteoprotegerin (OPG), a decoy receptor for RANKL...
April 18, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29671778/high-contrast-imaging-of-cholesterol-crystals-in-rabbit-arteries-ex-vivo-using-led-based-polarization-microscopy
#13
Seonghee Cho, Kyungmin Kim, Taehoon Kim, Hyoeun Park, Jin-Moo Kim, SeungHoon Lee, YeonSu Kang, Kiyuk Chang, Chulhong Kim
Detection of cholesterol crystals (Chcs) in atherosclerosis disease is important for understanding the pathophysiology of atherosclerosis. Polarization microscopy (PM) has been in use traditionally for detecting Chcs, but they have difficulty in distinguishing Chcs with other crystalline materials in tissue, such as collagens. Thus, most studies using PM have been limited to studying cell-level samples. Although various methods have been proposed to detect Chcs with high specificity, most of them have low signal-to-noise ratios, a high system construction cost, and are difficult to operate due to a complex protocol...
April 19, 2018: Sensors
https://www.readbyqxmd.com/read/29671258/atrial-overexpression-of-microrna-27b-attenuates-angiotensin-ii-induced-atrial-fibrosis-and-fibrillation-by-targeting-alk5
#14
Yanshan Wang, Heng Cai, Hongmei Li, Zhisheng Gao, Kunqing Song
Atrial fibrosis influences atrial fibrillation (AF) development by transforming growth factor beta 1 (TGF-β1)/Smad pathway. Although microRNAs are implicated in the pathogenesis of various diseases, information regarding the functional role of microRNAs in atrial dysfunction is limited. In the present study, we found that microRNA-27b (miR-27b) was the dominant member of miR-27 family expressed in left atrium. Moreover, the expression of miR-27b was significantly reduced after angiotensin II (AngII) infusion...
April 18, 2018: Human Cell
https://www.readbyqxmd.com/read/29670900/t-614-promotes-osteoblastic-cell-differentiation-by-increasing-dlx5-expression-and-regulating-the-activation-of-p38-and-nf-%C3%AE%C2%BA-b
#15
Jinglue Song, Hongli Liu, Qi Zhu, Yutong Miao, Feiyan Wang, Fan Yang, Wenjing Cheng, Yebin Xi, Xiaoyin Niu, Dongyi He, Guangjie Chen
Rheumatoid arthritis (RA) is an autoimmune inflammatory disease characterized by bone loss. Degree of inflammation has been identified as an important initiator of skeletal damage in RA. Iguratimod (T-614) is an anti-inflammatory agent which has been reported to show the inhibitory effect of bone destruction in RA. However, the role of T-614 in osteoblast differentiation is still not clear. In this study, we intended to find the effect of T-614 on the osteogenesis process. We detected osteogenesis markers and transcription factors associated with osteoblastic lineage and bone formation in the culture of mesenchymal stem cells which differentiate osteoblast...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29670724/oral-bilateral-collagenous-fibroma-a-previously-unreported-case-and-literature-review
#16
Ana-Carolina Vasconcelos, Ana-Paula Gomes, Sandra Tarquinio, Eduardo Abduch-Rodrigues, Ricardo Mesquita, Karine Silva
Collagenous fibroma, also known as desmoplastic fibroblastoma, is a rare benign slow growing tumor particularly uncommon in the oral cavity. The aim of this study was to analyze the clinical and histopathological features of an oral collagenous fibroma as well as to compare this data with those reported in an English-literature review. The thirteenth case of collagenous fibroma in the oral cavity and the first to present clinically as a bilateral mass was described. A 48-years-old female patient was referred to a School of Dentistry, complaining about an asymptomatic swelling on the hard palate, lasting around ten years...
January 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29670408/acute-hepatitis-e-in-a-renal-transplantation-recipient-a-case-report
#17
Mitsutoshi Shindo, Hiroaki Takemae, Takafumi Kubo, Masatsugu Soeno, Tetsuo Ando, Yoshiyuki Morishita
Hepatitis E is caused by infection with the hepatitis E virus (HEV). HEV is transmitted orally via HEV-contaminated food or drink. Hepatitis E usually shows mild symptoms and is self-limiting in the general population; however, it may progress to chronic hepatitis in immunosuppressed patients such as recipients of organ transplantation. However, a few cases of acute hepatitis E have been reported in organ transplantation recipients. We herein report a case of acute hepatitis E in a 31-year-old male renal transplant recipient...
2018: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/29670183/anticoagulant-mechanism-pharmacological-activity-and-assessment-of-preclinical-safety-of-a-novel-fibrin-ogen-olytic-serine-protease-from-leaves-of-leucas-indica
#18
Debananda Gogoi, Neha Arora, Bhargab Kalita, Rahul Sarma, Taufikul Islam, Sidhhartha S Ghosh, Rajlakshmi Devi, Ashis K Mukherjee
The harnessing of medicinal plants containing a plethora of bioactive molecules may lead to the discovery of novel, potent and safe therapeutic agents to treat thrombosis-associated cardiovascular diseases. A 35 kDa (m/z 34747.5230) serine protease (lunathrombase) showing fibrin(ogen)olytic activity and devoid of N- and O- linked oligosaccharides was purified from an extract of aqueous leaves from L. indica. The LC-MS/MS analysis, de novo sequencing, secondary structure, and amino acid composition determination suggested the enzyme's novel characteristic...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29669946/pravastatin-therapy-during-preeclampsia-prevents-long-term-adverse-health-effects-in-mice
#19
Nicola Garrett, Joaquim Pombo, Michelle Umpierrez, James E Clark, Mark Simmons, Guillermina Girardi
Preeclampsia (PE), associates with long-term increased risk for cardiovascular disease in women, suggesting that PE is not an isolated disease of pregnancy. It is not known if increased risk for long-term diseases is due to PE-specific factors or to prepregnancy renal and cardiovascular risk factors. We used a mouse model in which a WT female with normal prepregnancy health develops PE to investigate if preeclampsia causes long-term cardiovascular consequences after pregnancy for mothers and offspring. Mothers exhibited endothelial dysfunction and hypertension after PE and had glomerular injury that not only persisted but deteriorated, leading to fibrosis...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29669386/the-essential-ectoenzyme-smnpp5-from-the-human-intravascular-parasite-schistosoma-mansoni-is-an-adpase-and-a-potent-inhibitor-of-platelet-aggregation
#20
Manal Elzoheiry, Akram A Da'dara, Armelle M deLaforcade, Samar N El-Beshbishi, Patrick J Skelly
Schistosomes are intravascular parasitic platyhelminthes infecting > 200 million people globally and causing a debilitating disease, schistosomiasis. Despite the relatively large size of the adult worms and their disruption of blood flow, surprisingly, they do not appear to provoke thrombus formation around them in vivo. We hypothesize that proteins expressed at the host-parasite interface are key to this ability. Here, we functionally express an ectonucleotide pyrophosphatase/phosphodiesterase homologue, SmNPP5, that is expressed at the tegumental surface of intravascular Schistosoma mansoni ...
April 18, 2018: Thrombosis and Haemostasis
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