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Collagen type I

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https://www.readbyqxmd.com/read/29793021/phosphoinositide-3-kinase-p110%C3%AE-negatively-regulates-thrombopoietin-mediated-platelet-activation-and-thrombus-formation
#1
T A Blair, S F Moore, T G Walsh, J L Hutchinson, T N Durrant, K E Anderson, A W Poole, I Hers
Phosphoinositide 3-kinase (PI3K) plays an important role in platelet function and contributes to platelet hyperreactivity induced by elevated levels of circulating peptide hormones, including thrombopoietin (TPO). Previous work established an important role for the PI3K isoform; p110β in platelet function, however the role of p110α is still largely unexplored. Here we sought to investigate the role of p110α in TPO-mediated hyperactivity by using a conditional p110α knockout (KO) murine model in conjunction with platelet functional assays...
May 21, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29793000/effect-of-a-bisphosphonate-and-selective-estrogen-receptor-modulator-on-bone-remodeling-in-streptozotocin-induced-diabetes-and-ovariectomized-rat-model
#2
Young-Seok Lee, Rishab Gupta, Jeong-Taik Kwon, Dae-Chul Cho, Ye Jin Seo, Sung Young Seu, Eui Kyun Park, Inbo Han, Chi-Heon Kim, Joo-Kyung Sung, Kyoung-Tae Kim
BACKGROUND CONTEXT: Diabetes and menopause can cause severe osteoporosis. In general, menopause and diabetes can lead to an imbalance in bone turnover, which results in secondary osteoporosis. However, the efficacy of antiresorptive drugs against this form of osteoporosis has not been extensively evaluated. OBJECTIVE: The aim of this study was to determine the changes in vertebral bone remodeling when postmenopausal osteoporosis is accompanied by diabetes and the efficacy of bisphosphonates and selective estrogen-receptor modulators (SERMs) against these outcomes...
May 21, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29792508/effects-of-tgf-%C3%AE-overexpression-via-raav-gene-transfer-on-the-early-repair-processes-in-an-osteochondral-defect-model-in-minipigs
#3
Magali Cucchiarini, Ann-Kathrin Asen, Lars Goebel, Jagadeesh K Venkatesan, Gertrud Schmitt, David Zurakowski, Michael D Menger, Matthias W Laschke, Henning Madry
BACKGROUND: Application of the chondrogenic transforming growth factor beta (TGF-β) is an attractive approach to enhance the intrinsic biological activities in damaged articular cartilage, especially when using direct gene transfer strategies based on the clinically relevant recombinant adeno-associated viral (rAAV) vectors. PURPOSE: To evaluate the ability of an rAAV-TGF-β construct to modulate the early repair processes in sites of focal cartilage injury in minipigs in vivo relative to control (reporter lacZ gene) vector treatment...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29791208/human-soluble-phospholipase-a-2-receptor-is-an-inhibitor-of-the-integrin-mediated-cell-migratory-response-to-collagen-i
#4
Kazunori Watanabe, Kazuhiro Watanabe, Yosuke Watanabe, Daisuke Fujioka, Takamitsu Nakamura, Kazuto Nakamura, Jun-Ei Obata, Kiyotaka Kugiyama
Murine membrane-bound phospholipase A2 receptor 1 (PLA2 R) is shed and released into plasma in a soluble form that retains all of the extracellular domains. Relatively little is known about human PLA2 R. This study examined whether human soluble PLA2 R may have biological functions and whether soluble PLA2 R may exist in human plasma. Here, we showed that human recombinant soluble PLA2 R (rsPLA2 R) bound to collagen-I and inhibited interaction of collagen-I with the extracellular domain of integrin β1 on the cell surface of HEK293 cells...
May 23, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29789348/gestational-low-protein-intake-enhances-whole-kidney-mir-192-and-mir-200-family-expression-and-epithelial-to-mesenchymal-transition-in-rat-adult-male-offspring
#5
Letícia B Sene, Victor Hugo Gonçalves Rizzi, José A R Gontijo, Patricia A Boer
Studies have shown that adult offspring of mothers fed a protein-restricted diet during pregnancy present a pronounced reduction of nephron number associated with decreased fractional urinary sodium excretion and arterial hypertension. Additionally, recent advances in our understanding of the molecular pathways that govern the association of gestational nutritional restriction, intrauterine growth retardation and inflammation with impaired nephrogenesis, nephron underdosing and kidney fibrosis point to the epithelial to mesenchymal transition (EMT) as a common factor...
May 22, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29787588/angiogenic-and-pleiotropic-effects-of-vegf165-and-hgf-combined-gene-therapy-in-a-rat-model-of-myocardial-infarction
#6
Pavel I Makarevich, Konstantin V Dergilev, Zoya I Tsokolaeva, Maria A Boldyreva, Evgeniy K Shevchenko, Evgeny V Gluhanyuk, Julia O Gallinger, Mikhail Yu Menshikov, Yelena V Parfyonova
Since development of plasmid gene therapy for therapeutic angiogenesis by J. Isner this approach was an attractive option for ischemic diseases affecting large cohorts of patients. However, first placebo-controlled clinical trials showed its limited efficacy questioning further advance to practice. Thus, combined methods using delivery of several angiogenic factors got into spotlight as a way to improve outcomes. This study provides experimental proof of concept for a combined approach using simultaneous delivery of VEGF165 and HGF genes to alleviate consequences of myocardial infarction (MI)...
2018: PloS One
https://www.readbyqxmd.com/read/29783650/reproduction-of-characteristics-of-extracellular-matrices-in-specific-longitudinal-depth-zone-cartilage-within-spherical-organoids-in-response-to-changes-in-osmotic-pressure
#7
Eiichiro Takada, Shuichi Mizuno
Articular cartilage is compressed with joint-loading and weight-bearing stresses, followed by a bulging of the tissue during times of off-loading. This loading and off-loading causes changes in water content, and thus alterations in osmotic pressure. Another unique characteristic of articular cartilage is that it has longitudinal depth: surface, middle, and deep zones. Since each zone is composed of unique components of highly negative extracellular matrices, each zone has a different level of osmotic pressure...
May 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29783229/-morphological-characteristics-of-kidneys-connective-tissue-of-mature-fetuses-and-newborns-from-mothers-whose-pregnancy-was-complicated-by-preeclampsia-of-varying-degrees-of-severity
#8
Iryna V Sorokina, Mykhailo S Myroshnychenko, Nataliia V Kapustnyk, Tetyana O Khramova, Oksana V Dehtiarova, Svitlana I Danylchenko
OBJECTIVE: Introduction: The kidneys connective tissue condition in the antenatal period affects the formation of tissues and it changes with the development of various general pathological processes in this organ. The aim of the study was to identify the morphological features of kidneys connective tissue of fetuses and newborns from mothers whose pregnancy was complicated by preeclampsia of varying degrees of severity. PATIENTS AND METHODS: Materials and methods: The material of the study was the tissue of kidneys of mature fetuses and newborns from mothers with physiological pregnancy (28 cases), as well as from mothers whose pregnancy was complicated by preeclampsia of varying degrees of severity (78 cases)...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29782392/collagen-biomarkers-predict-new-onset-of-hypertension-in-normotensive-participants-the-multi-ethnic-study-of-atherosclerosis
#9
Daniel A Duprez, Myron D Gross, Joachim H Ix, Jorge R Kizer, Russell P Tracy, Steven Shea, David R Jacobs
OBJECTIVE: Vascular remodeling associated with increased extracellular matrix (ECM) may precede hypertension. Procollagen type III N-terminal propeptide (PIIINP) and collagen type I carboxy-terminal telopeptide (ICTP) reflect collagen turnover and are important in ECM remodeling. PIIINP and ICTP are increased in cardiovascular diseases (CVD). We hypothesized that PIIINP and ICTP among normotensives predict incident hypertension. METHODS: We included 1252 Multi-Ethnic Study of Atherosclerosis participants with mean age 58...
May 17, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29782306/urticarial-lesions-in-a-pregnant-woman
#10
Sergio Santos-Alarcón, Cesar Benavente-Villegas, Isabel García-Briz, Magdalena Moneva-Léniz, Celia Sanchis-Sánchez, Almudena Mateu-Puchades
Dear Editor, Gestational pemphigoid (GP) is a rare autoimmune bullous dermatosis in pregnancy. GP usually occurs during the second or third month of pregnancy. It clinically manifests as the development of either early-onset urticarial lesions or late-onset subepidermal blisters that may linger for weeks or even months. Herein we report the case of a 45-year-old woman with the distinctive clinical onset of GP. A forty-five-year-old woman, gravida I, para 0, at 27 weeks gestation, was referred for evaluation to our Department with an extensive pruritic eruption that had developed over the previous 7 days...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29782266/-the-association-of-gene-polymorphisms-of-matrix-metalloproteinases-9-12-and-20-and-collagen-type-i-degradation-products-with-the-remodeling-of-the-left-ventricle-in-patients-with-acute-myocardial-infarction
#11
N A Sokolova, M S Danshova, A V Govorin, D N Zaytsev, Y N Smolyakov
OBJECTIVE: to study associations of polymorphism of the genes MMP9 rs17576, MMP12 rs2276109, MMP20 rs2245803, COL1A1 rs1800012, COL1A1 rs1107946 with remodeling of the left ventricle in patients with acute myocardial infarction. MATERIALS AND METHODS: We examined 84 patients with myocardial infarction (MI). Type of early postinfarction left ventricular (LV) remodeling was determined by echocardiography on the third day of the disease. Concentration of matrix metalloproteinases (MMP) was measured by enzyme immunoassay using commercial kits; content of C-terminal telopeptide of collagen type I degradation products (ICTP) was measured by chemiluminescent immunoassay...
March 2018: Kardiologiia
https://www.readbyqxmd.com/read/29781507/effect-of-estradiol-on-fibroblasts-from-postmenopausal-idiopathic-carpal-tunnel-syndrome-patients
#12
Yoshiaki Yamanaka, Kunitaka Menuki, Takafumi Tajima, Yasuaki Okada, Kenji Kosugi, Yukichi Zenke, Akinori Sakai
Fibrosis of the subsynovial connective tissue (SSCT) is a characteristic finding in patients with idiopathic carpal tunnel syndrome (CTS). Idiopathic CTS frequently occurs in postmenopausal women; therefore, female steroid hormones, especially estrogens, may be involved in its development. In this study, we evaluated the effect of the estradiol on the expression of genes and proteins related to fibrosis of SSCT fibroblasts from patients with idiopathic CTS. This study included 10 postmenopausal women (mean age 76 years)...
May 21, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29781361/erythromycin-combined-with-corticosteroid-reduced-inflammation-and-modified-trauma-induced-tracheal-stenosis-in-a-rabbit-model
#13
Qin Enyuan, Xu Mingpeng, Gan Luoman, Gan Jinghua, Li Yu, Li Wentao, Hou Changchun, Li Lihua, Meng Xiaoyan, Zhou Lei, Liu Guangnan
BACKGROUND: Patients with endotracheal intubation or tracheostomy are subject to benign tracheal stenosis (TS), for which current therapies are unsatisfactory. We conducted a preliminary investigation of drugs and drug combinations for the prevention and treatment of TS in a rabbit model. METHODS: Fifty-four rabbits were apportioned into nine groups according to treatment: sham-operated control; untreated TS model; amikacin; budesonide; erythromycin; penicillin; amikacin + budesonide; erythromycin + budesonide; and penicillin + budesonide...
January 2018: Therapeutic Advances in Respiratory Disease
https://www.readbyqxmd.com/read/29780950/extreme-descemet-s-membrane-rupture-with-hydrops-in-keratoconus-clinical-and-histological-manifestations
#14
I-Ping Loh, Jennifer C Fan Gaskin, Trevor Sherwin, Charles N J McGhee
Purpose: To study the clinical and histological manifestations of an extreme Descemet's membrane rupture as a result of keratoconus. Observations: Using Periodic acid-Schiff assay to study a keratoconic cornea with an extreme rupture showed that the ruptured Descemet's membrane had retracted and folded into scrolls and ridges. The dimensions of the rupture were estimated to be 3.7mm2 , and the central cornea was extremely thinned with a thickness of only 260μm...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29777737/type-i-collagen-induces-mesenchymal-cell-differentiation-into-myofibroblasts-through-yap-induced-tgf-%C3%AE-1-activation
#15
Xiaoling Liu, Xinyu Long, Weiwei Liu, Yeli Zhao, Toshihiko Hayashi, Masayuki Yamato, Kazunori Mizuno, Hitomi Fujisaki, Shunji Hattori, Shin-Ichi Tashiro, Takaaki Ogura, Yuji Atsuzawa, Takashi Ikejima
In organ fibrosis, mechanical stress and transforming growth factor beta-1 (TGF-β1) promote differentiation into myofibroblast from mesenchymal cells, leading to extracellular matrix (ECM) remodeling or active synthesis, deposition or degradation of ECM components. A major component of ECM, type I collagen (col I) triple helical molecules assemble into fibrils or are denatured to gelatin without triple-helicity in remodeling. However, whether changes of ECM components in remodeling have influence on mesenchymal cell differentiation remains elusive...
May 16, 2018: Biochimie
https://www.readbyqxmd.com/read/29777019/cellular-origin-and-functional-relevance-of-collagen-i-production-in-the-kidney
#16
Simone Buchtler, Alexandra Grill, Stefanie Hofmarksrichter, Petra Stöckert, Gabriela Schiechl-Brachner, Manuel Rodriguez Gomez, Sophia Neumayer, Kathrin Schmidbauer, Yvonne Talke, Barbara M Klinkhammer, Peter Boor, Alexander Medvinsky, Kerstin Renner, Hayo Castrop, Matthias Mack
Background Interstitial fibrosis is associated with chronic renal failure. In addition to fibroblasts, bone marrow-derived cells and tubular epithelial cells have the capacity to produce collagen. However, the amount of collagen produced by each of these cell types and the relevance of fibrosis to renal function are unclear. Methods We generated conditional cell type-specific collagen I knockout mice and used (reversible) unilateral ureteral obstruction and adenine-induced nephropathy to study renal fibrosis and function...
May 18, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29775998/high-pressure-raman-study-of-type-i-collagen
#17
Amalia Maria Paschou, Maria Katsikini, Dimitrios Christofilos, John Arvanitidis, Sotirios Ves
The high pressure response of type-I collagen from bovine Achilles tendon is investigated with micro-Raman spectroscopy. Fluorinert™ and methanol-ethanol mixtures were used as pressure transmitting media (PTM) in a diamond anvil cell. The Raman spectrum of collagen is dominated by three bands centred at approximately 1450, 1660 and 2930 cm-1 , attributed to C-H deformation, C=O stretching of the peptide bond (amide-I band) and C-H stretching modes, respectively. Upon pressure increase, using Fluorinert™ as PTM, a shift towards higher frequencies of the C-H stretching and deformation peaks is observed...
May 18, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29775761/the-bone-anabolic-effects-of-irisin-are-through-preferential-stimulation-of-aerobic-glycolysis
#18
Dingdong Zhang, ChuHyun Bae, Junghak Lee, Jiho Lee, Zeyu Jin, Myeongmo Kang, Young Suk Cho, Jeong-Han Kim, Weontae Lee, Sung-Kil Lim
Irisin, a recently identified hormone secreted by skeletal muscle in response to exercise, exhibits anabolic effects on the skeleton primarily through the stimulation of bone formation. However, the mechanism underlying the irisin-stimulated anabolic response remains largely unknown. To uncover the underlying mechanism, we biosynthesized recombinant irisin (r-irisin) using an Escherichia coli expression system and used it to treat several osteoblast cell types. Our synthesized r-irisin could promote proliferation and differentiation of osteoblasts as evidenced by enhanced expression of osteoblast-specific transcriptional factors, including Runt-related transcription factor-2 (Runx2), Oster (Osx), as well as early osteoblastic differentiation markers such as alkaline phosphatase (Alp) and collagen type I alpha 1 (Col1a1)...
May 15, 2018: Bone
https://www.readbyqxmd.com/read/29774570/high-mobility-group-box-1-drives-fibrosis-progression-signaling-via-the-receptor-for-advanced-glycation-end-products-in-mice
#19
Xiaodong Ge, Elena Arriazu, Fernando Magdaleno, Daniel J Antoine, Rouchelle Dela Cruz, Neil Theise, Natalia Nieto
BACKGROUND & RATIONALE: High-mobility group box-1 (HMGB1) is a damage-associated molecular pattern (DAMP) increased in response to liver injury. Since HMGB1 is a ligand for the receptor for advanced glycation end-products (RAGE), we hypothesized that induction of HMGB1 could participate in the pathogenesis of liver fibrosis via RAGE cell-specific signaling mechanisms. RESULTS: liver HMGB1 protein expression correlated with fibrosis stage in patients with chronic Hepatitis C virus (HCV) infection, primary biliary cirrhosis (PBC) and alcoholic steatohepatitis (ASH)...
May 18, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29774455/semaphorin-3a-promotes-osteogenic-differentiation-of-bmsc-from-type-2-diabetes-mellitus-rats
#20
Qiao Qiao, Xiaoru Xu, Yingliang Song, Shuang Song, Wenzhong Zhu, Fenglan Li
Bone regeneration is impaired in patients with type 2 diabetes mellitus (T2DM), which leads to non-healing after bone loss. The decreased osteogenic capacity of bone mesenchymal stem cells (BMSCs) might be a main reason. Sema3A, as a powerful protein promoting osteocyte differentiation, shows potential for bone regeneration treatment. BMSCs may be a therapeutic solution. In this study, we divided BMSCs from T2DM rats (BMSCs-D) and normal rats (BMSCs-N), identified their ability to differentiate into different cell types...
May 17, 2018: Journal of Molecular Histology
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