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lysyl oxidase

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https://www.readbyqxmd.com/read/27899976/low-extracellular-lysyl-oxidase-expression-is-associated-with-poor-prognosis-in-patients-with-prostate-cancer
#1
Wei Zheng, Xuejian Wang, Qiwei Chen, Kun Fang, Lina Wang, Feng Chen, Xiancheng Li, Ziyao Li, Jianbo Wang, Yingxi Liu, Deyong Yang, Xishuang Song
Remodeling of the extracellular matrix (ECM), which is induced by lysyl oxidase (LOX), has been demonstrated to accompany tumor progression; however, the association between LOX expression levels and the malignant behavior of prostate cancer (Pca) remains unclear. The present study aimed to analyze the tumor-associated expression profile of LOX in patients with Pca and to evaluate its potential prognostic value. In the form of a retrospective study, the expression patterns of LOX and collagen I were analyzed in patients with benign prostate hyperplasia and Pca by immunohistochemical examination...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27891585/novel-mutations-in-kars-cause-hypertrophic-cardiomyopathy-and-combined-mitochondrial-respiratory-chain-defect
#2
Daniela Verrigni, Daria Diodato, Michela Di Nottia, Alessandra Torraco, Emanuele Bellacchio, Teresa Rizza, Giulia Tozzi, Margherita Verardo, Fiorella Piemonte, Giorgio Tasca, Adele D'Amico, Enrico Bertini, Rosalba Carrozzo
Mutations in KARS, which encodes for both mitochondrial and cytoplasmic lysyl-tRNA synthethase, have been so far associated with three different phenotypes: the recessive form of Charcot Mary-Tooth polyneuropathy, the autosomal recessive non-syndromic hearing loss and the last recently described condition related to congenital visual impairment and progressive microcephaly. Here we report the case of a 14-years-old-girl with severe cardiomyopathy associated to mild psychomotor delay and mild myopathy; moreover, a diffuse reduction of cytochrome C oxidase (COX, complex IV) and a combined enzymatic defect of complex I (CI) and IV (CIV) was evident in muscle biopsy...
November 28, 2016: Clinical Genetics
https://www.readbyqxmd.com/read/27877081/p-selectin-mediated-lox-expression-promotes-insulinoma-growth-in-rip1-tag2-mice-by-increasing-tissue-stiffness
#3
Cuiling Qi, Jialin Li, Simei Guo, Mengshi Li, Yuanyuan Li, Jiangchao Li, Qianqian Zhang, Lingyun Zheng, Xiaodong He, Xiaoming Zheng, Yanli He, Lijing Wang, Bo Wei
P-selectin, a cell adhesion molecule, is an important member of the selectin family. Recent studies have shown that P-selectin deletion inhibits tumor growth in Rip1-Tag2 mice by suppressing platelet accumulation in tumor tissues. This study aimed to evaluate whether and how P-selectin affects tumor stiffness in Rip1-Tag2 mice. To explore the role of P-selectin in tissue stiffness, we demonstrated that tumor progression in Rip1-Tag2 mice was correlated with tissue stiffness using immunofluorescence and histological staining...
2016: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/27876853/collagen-cross-linking-insights-on-the-evolution-of-metazoan-extracellular-matrix
#4
Fernando Rodriguez-Pascual, David Anthony Slatter
Collagens constitute a large family of extracellular matrix (ECM) proteins that play a fundamental role in supporting the structure of various tissues in multicellular animals. The mechanical strength of fibrillar collagens is highly dependent on the formation of covalent cross-links between individual fibrils, a process initiated by the enzymatic action of members of the lysyl oxidase (LOX) family. Fibrillar collagens are present in a wide variety of animals, therefore often being associated with metazoan evolution, where the emergence of an ancestral collagen chain has been proposed to lead to the formation of different clades...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27860390/increased-lysyl-oxidase-like-2-associates-with-a-poor-prognosis-in-non-small-cell-lung-cancer
#5
Ping Zhan, Xiao-Jing Lv, Ya-Nan Ji, Haiyan Xie, Li-Ke Yu
BACKGROUND: Lysyl oxidase-like 2 (LOXL2) is a member of the lysyl oxidase family and is associated with invasiveness and metastasis in breast cancer. However, its relevance in non-small cell lung cancer (NSCLC) remained largely unknown. METHODS: LOXL2 protein levels in a cohort of NSCLC and adjacent normal lung tissues were evaluated and analyzed their clinicopathologic and prognostic significance. RESULTS: We found that cytoplasmic and nuclear LOXL2 levels were higher in lung adenocarcinoma (AD) and squamous cell carcinoma (SCC) tissues than in paired adjacent normal tissues...
November 18, 2016: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/27832315/bazedoxifene-ameliorates-homocysteine-induced-apoptosis-and-accumulation-of-advanced-glycation-end-products-by-reducing-oxidative-stress-in-mc3t3-e1-cells
#6
Ippei Kanazawa, Tsutomu Tomita, Shun Miyazaki, Eiji Ozawa, Luis A Yamamoto, Toshitsugu Sugimoto
Elevated plasma homocysteine (Hcy) level increases the risk of osteoporotic fracture by deteriorating bone quality. However, little is known about the effects of Hcy on osteoblast and collagen cross-links. This study aimed to investigate whether Hcy induces apoptosis of osteoblastic MC3T3-E1 cells as well as affects enzymatic and nonenzymatic collagen cross-links and to determine the effects of bazedoxifene, a selective estrogen receptor modulator, on the Hcy-induced apoptosis and deterioration of collagen cross-links in the cells...
November 10, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27829073/%C3%AE-aminopropionitrile-induced-reduction-in-enzymatic-crosslinking-causes-in-vitro-changes-in-collagen-morphology-and-molecular-composition
#7
Silvia P Canelón, Joseph M Wallace
Type I collagen morphology can be characterized using fibril D-spacing, a metric which describes the periodicity of repeating bands of gap and overlap regions of collagen molecules arranged into collagen fibrils. This fibrillar structure is stabilized by enzymatic crosslinks initiated by lysyl oxidase (LOX), a step which can be disrupted using β-aminopropionitrile (BAPN). Murine in vivo studies have confirmed effects of BAPN on collagen nanostructure and the objective of this study was to evaluate the mechanism of these effects in vitro by measuring D-spacing, evaluating the ratio of mature to immature crosslinks, and quantifying gene expression of type I collagen and LOX...
2016: PloS One
https://www.readbyqxmd.com/read/27826254/elastin-in-the-liver
#8
REVIEW
Jiří Kanta
A characteristic feature of liver cirrhosis is the accumulation of large amounts of connective tissue with the prevailing content of type I collagen. Elastin is a minor connective tissue component in normal liver but it is actively synthesized by hepatic stellate cells and portal fibroblasts in diseased liver. The accumulation of elastic fibers in later stages of liver fibrosis may contribute to the decreasing reversibility of the disease with advancing time. Elastin is formed by polymerization of tropoelastin monomers...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27824121/sequence-basis-of-barnacle-cement-nanostructure-is-defined-by-proteins-with-silk-homology
#9
Christopher R So, Kenan P Fears, Dagmar H Leary, Jenifer M Scancella, Zheng Wang, Jinny L Liu, Beatriz Orihuela, Dan Rittschof, Christopher M Spillmann, Kathryn J Wahl
Barnacles adhere by producing a mixture of cement proteins (CPs) that organize into a permanently bonded layer displayed as nanoscale fibers. These cement proteins share no homology with any other marine adhesives, and a common sequence-basis that defines how nanostructures function as adhesives remains undiscovered. Here we demonstrate that a significant unidentified portion of acorn barnacle cement is comprised of low complexity proteins; they are organized into repetitive sequence blocks and found to maintain homology to silk motifs...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27804215/simultaneously-targeting-myofibroblast-contractility-and-extracellular-matrix-cross-linking-as-a-therapeutic-concept-in-airway-fibrosis
#10
Y-C Lin, Y K Sung, X Jiang, M Peters-Golden, M R Nicolls
Fibrosis after solid organ transplantation is considered an irreversible process and remains the major cause of graft dysfunction and death with limited therapies. This remodeling is characterized by aberrant accumulation of contractile myofibroblasts that deposit excessive extracellular matrix (ECM) and increase tissue stiffness. Studies demonstrate, however, that a stiff ECM itself promotes fibroblast-to-myofibroblast differentiation, stimulating further ECM production. This creates a positive feedback loop that perpetuates fibrosis...
November 2, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27770022/lysyl-oxidase-like-2-crosslinks-collagen-iv-of-glomerular-basement-membrane
#11
Carolina Anazco, Alberto J Lopez-Jimenez, Mohamed Rafi, Lorenzo Vega-Montoto, Ming-Zhi Zhang, Billy G Hudson, Roberto M Vanacore
The 7S dodecamer is recognized as an important structural crosslinking domain of collagen IV networks that provide mechanical stability to basement membranes, a specialized form of extracellular matrix essential for the development and maintenance of tissue architecture. Although the 7S dodecamer is stabilized by covalent crosslinking, the molecular mechanism by which such crosslinks are formed has not been revealed. Here we aimed to identify the enzyme(s) that crosslinks the 7S dodecamer and characterize its expression in the kidney glomerulus...
October 21, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27769988/influencing-the-tumor-microenvironment-phase-2-study-of-copper-depletion-with-tetrathiomolybdate-in-high-risk-breast-cancer-and-preclinical-models-of-lung-metastases
#12
Nancy Chan, Amy Willis, Naomi Kornhauser, Maureen M Ward, Sharrell B Lee, Eleni Nackos, Bo Ri Seo, Ellen Chuang, Tessa Cigler, Anne Moore, Diana Donovan, Marta Vallee Cobham, Veronica Fitzpatrick, Sarah Schneider, Alysia Wiener, Jessica Guillaume-Abraham, Elnaz Anjom, Richard Zelkowitz, J David Warren, Maureen E Lane, Claudia Fischbach, Vivek Mittal, Linda Vahdat
PURPOSE: Bone marrow derived progenitor cells; including VEGFR2+ endothelial progenitor cells (EPCs) and copper-dependent pathways model the tumor microenvironment. We hypothesized that copper depletion (CD) using tetrathiomolybdate (TM) would reduce EPCs in high risk for relapse breast cancer (BC) patients (pts). We investigated the effect of TM on the tumor microenvironment in preclinical models. EXPERIMENTAL DESIGN: Stage 2 triple negative BC (TNBC), Stage 3 and stage 4 without any evidence of disease, (NED) BC pts, received oral TM to maintain ceruloplasmin (Cp) between 8-17mg/dL for 2 years or until relapse...
October 21, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27769742/all-trans-retinoic-acid-promotes-wound-healing-of-primary-amniocytes-through-the-induction-of-loxl4-a-member-of-the-lysyl-oxidase-family
#13
Marion Rouzaire, Aurélie Comptour, Corinne Belville, Damien Bouvier, Gaël Clairefond, Flora Ponelle, Vincent Sapin, Denis Gallot, Loïc Blanchon
Thirty percent of preterm births directly result from preterm premature rupture of fetal membranes (PPROM). Clinical management currently proposes using a collagen plug to mechanically stop loss of amniotic fluid. Vitamin A and its active metabolite (retinoic acid) have well-known pro-healing properties and could thus make good candidates as a proposable adjuvant to this mechanical approach. Here we investigate the molecular mechanisms involved in the pro-healing properties of all-trans retinoic acid (atRA) in fetal membranes via an approach using an in vitro primary amniocyte wound model and transcriptomics...
October 18, 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27761366/the-role-of-lysyl-oxidase-the-extracellular-matrix-and-the-pre-metastatic-niche-in-bone-metastasis
#14
Alison Gartland, Janine T Erler, Thomas R Cox
Most deaths from solid cancers occur as a result of secondary metastasis to distant sites. Bone is the most frequent metastatic site for many cancer types and can account for up to 80% of cancer-related deaths in certain tumours. The progression from a discrete solid primary tumour to devastating and painful bone metastases is a complex process involving multiple cell types and steps. There is increasing evidence that modulation of the extracellular matrix plays an important role in the lethal transition from a primary to disseminated metastatic bone tumour...
September 2016: Journal of Bone Oncology
https://www.readbyqxmd.com/read/27753755/association-of-lysyl-oxidase-like-1-gene-polymorphism-in-turkish-patients-with-pseudoexfoliation-syndrome-and-pseudoexfoliation-glaucoma
#15
Mahmut Asfuroglu, Busranur Cavdarli, Ozlem G Koz, Ahmet A Yarangumeli, Emine Y Ozdemir
PURPOSE: To investigate the genetic association of lysyl oxidase-like 1 (LOXL1) gene polymorphisms in patients with pseudoexfoliation (PEX) syndrome and PEX glaucoma of Turkish descent. METHODS: Three LOXL1 single nucleotide polymorphisms (SNPs) (rs1048661, rs3825942, and rs2165241) were analyzed in 109 Turkish patients (44 patients with PEX syndrome, 65 patients with PEX glaucoma) and 47 healthy subjects. RESULTS: "A" allele of SNP rs3825942 was underrepresented in control group compared with the glaucoma [odds ratio (OR)=4...
October 6, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27742687/lysyl-oxidase-is-a-strong-determinant-of-tumor-cell-colonization-in-bone
#16
Caroline Reynaud, Laura Ferreras, Paola Di Mauro, Casina Kan, Martine Croset, Edith Bonnelye, Floriane Pez, Clémence Thomas, Géraldine Aimont, Antoine E Karnoub, Marie Brevet, Philippe Clezardin
Lysyl oxidase (LOX) is a secreted copper-dependent amine oxidase whose primary function is to drive collagen crosslinking and extracellular matrix stiffness. LOX in colorectal cancer (CRC) synergizes with hypoxia-inducible factor-1 (HIF-1alpha to promote tumor progression. Here we investigated whether LOX/HIF1 endows CRC cells with full competence for aggressive colonization in bone. We show that a high LOX expression in primary tumors from CRC patients was associated with poor clinical outcome, irrespective of HIF-1...
October 14, 2016: Cancer Research
https://www.readbyqxmd.com/read/27735137/lysyl-oxidase-like-2-loxl2-oxidizes-trimethylated-lysine-4-in-histone-h3
#17
Nicolás Herranz, Natàlia Dave, Alba Millanes-Romero, Laura Pascual-Reguant, Lluis Morey, Víctor M Díaz, Víctor Lórenz-Fonfría, Ricardo Gutierrez-Gallego, Celia Jerónimo, Ane Iturbide, Luciano Di Croce, Antonio García de Herreros, Sandra Peiró
: Methylation of histone H3 lysine 4 is linked to active transcription and can be removed by LSD1 or the JmjC domain-containing proteins by amino-oxidation or hydroxylation, respectively. Here we describe that its deamination can be catalyzed by lysyl oxidase-like 2 protein (LOXL2), presenting an unconventional chemical mechanism for H3K4 modification. Infrared spectroscopy and mass spectrometry analyses demonstrated that recombinant LOXL2 specifically deaminates trimethylated H3K4. Moreover, by regulating H3K4me3 deamination, LOXL2 activity is linked with the transcriptional control of the CDH1 gene...
December 2016: FEBS Journal
https://www.readbyqxmd.com/read/27732724/differential-molecular-expression-of-extracellular-matrix-and-inflammatory-genes-at-the-corneal-cone-apex-drives-focal-weakening-in-keratoconus
#18
Natasha Pahuja, Nimisha R Kumar, Rushad Shroff, Rohit Shetty, Rudy M M A Nuijts, Anuprita Ghosh, Abhijit Sinha-Roy, Shyam S Chaurasia, Rajiv R Mohan, Arkasubhra Ghosh
Purpose: In this study, we elucidated the differential expression of a set of local molecular factors in ectatic cone area of the cornea to uncover a functional cause for focal corneal weakening characteristic of the keratoconus (KC) disease. Methods: All human corneal samples were collected after approval of Institutional Ethics Committee and informed consent. Keratoconus patients were classified based on clinical parameters, topographical features, and structural deformity...
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27729337/divergent-functions-of-endotrophin-on-different-cell-populations-in-adipose-tissue
#19
Yueshui Zhao, Xue Gu, Ningyan Zhang, Mikhail G Kolonin, Zhiqiang An, Kai Sun
Endotrophin is a cleavage product of collagen 6 (Col6) in adipose tissue (AT). Previously, we demonstrated that endotrophin serves as a costimulator to trigger fibrosis and inflammation within the unhealthy AT milieu. However, how endotrophin affects lipid storage and breakdown in AT and how different cell types in AT respond to endotrophin stimulation remain unknown. In the current study, by using a doxycycline (Dox)-inducible mouse model, we observed significant upregulation of adipogenic genes in the WAT of endotrophin Tg mice...
October 11, 2016: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27720259/tgf-%C3%AE-1-promotes-linear-invadosome-formation-in-hepatocellular-carcinoma-cells-through-ddr1-up-regulation-and-collagen-i-cross-linking
#20
Zakaria Ezzoukhry, Elodie Henriet, Léo Piquet, Kevin Boyé, Paulette Bioulac-Sage, Charles Balabaud, Gabrielle Couchy, Jessica Zucman-Rossi, Violaine Moreau, Frédéric Saltel
Transforming growth factor-β1 (TGF-β1) is an important player in chronic liver diseases inducing fibrogenesis and hepatocellular carcinoma (HCC) development. TGF-β1 promotes pleiotropic modifications at the cellular and matrix microenvironment levels. TGF-β1 was described to enhance production of type I collagen and its associated cross-linking enzyme, the lysyl oxidase-like2 (LOXL2). In addition, TGF-β1 and type I collagen are potent inducers of invadosomes. Indeed, type I collagen fibers induce the formation of active linear invadosomes through the discoidin domain receptor 1 (DDR1)...
October 4, 2016: European Journal of Cell Biology
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