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Gelsolin

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https://www.readbyqxmd.com/read/28440466/mir-200a-targets-gelsolin-a-novel-mechanism-regulating-secretion-of-microvesicles-in-hepatocellular-carcinoma-cells
#1
Ya Xu, Yanfen Zhang, Lujing Wang, Ruiqi Zhao, Yu Qiao, Dong Han, Qian Sun, Nazhen Dong, Yicong Liu, Dantong Wu, Xuemei Zhang, Ning Huang, Ning Ma, Weiming Zhao, Yanhong Liu, Xu Gao
Microvesicle biogenesis is a highly regulated process. Aberrant release of microvesicles from cancer cells have been associated with their invasiveness and prognosis. However, the mechanism of aberrant release remains poorly understood. Herein, we found that hepatocellular carcinoma cells shed more microvesicles than normal hepatocytes and miR-200a were shown to inhibit the release of microvesicles in hepatocellular carcinoma cells. Then, we confirmed that miR-200a might target Gelsolin and change cytoskeleton to regulate microvesicles secretion...
May 2017: Oncology Reports
https://www.readbyqxmd.com/read/28431142/respiratory-chain-enzyme-deficiency-induces-mitochondrial-location-of-actin-binding-gelsolin-to-modulate-the-oligomerization-of-vdac-complexes-and-cell-survival
#2
Alberto García-Bartolomé, Ana Peñas, Lorena Marín-Buera, Teresa Lobo-Jarne, Rafael Pérez-Pérez, María Morán, Joaquín Arenas, Miguel A Martín, Cristina Ugalde
Despite considerable knowledge on the genetic basis of mitochondrial disorders, their pathophysiological consequences remain poorly understood. We previously used 2D-DIGE analyses to define a protein profile characteristic for respiratory chain complex III-deficiency that included a significant overexpression of cytosolic Gelsolin (GSN), a cytoskeletal protein that regulates the severing and capping of the actin filaments. Biochemical and immunofluorescence assays confirmed a specific increase of GSN levels in the mitochondria from patientś fibroblasts and from transmitochondrial cybrids with complex III assembly defects...
April 18, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28404947/identification-of-urine-biomarkers-associated-with-lung-adenocarcinoma
#3
Weiwei Wang, Shanshan Wang, Man Zhang
Lung adenocarcinoma (LAC) progression is accompanied by changes in protein levels that may be reflected in body fluids, such as urine. Urine collected from LAC patients (n=34) and healthy controls (n=36) was analyzed via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) combined with weak cationic exchange magnetic beads. The results revealed 76 urinary polypeptides significantly different between LAC patients and normal controls (P<0.05). Twenty-two of these peptides were up-regulated and 54 were down-regulated...
March 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28400331/four-paralog-gelsolin-genes-are-differentially-expressed-in-the-earthworm-lumbricus-terrestris
#4
Prasath Thiruketheeswaran, Paul Thomalla, Evelyn Krüger, Horst Hinssen, Jochen D'Haese
We have identified and characterized four distinct variants of the gelsolin-related protein (EWAM P1-P4) in the earthworm L. terrestris. All of these proteins biochemically qualify as gelsolins since they sever actin filaments in a calcium dependent manner. P1, P2 and P3 are present in the Lumbricus body wall muscle whereas in the gizzard muscle P3 and P4 were found. P1-P4 are encoded by four paralog genes and are differentially expressed in various muscle cell tissues. While the genes for P1 and P2 contain one intron, there was no intron in both P3 and P4 genes...
April 8, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28385809/free-actin-impairs-macrophage-bacterial-defenses-via-scavenger-receptor-marco-interaction-with-reversal-by-plasma-gelsolin
#5
Christine M Ordija, Terry Ting-Yu Chiou, Zhiping Yang, Glen M Deloid, Melina de Oliveira Valdo, Zhi Wang, Alice Bedugnis, Terry L Noah, Samuel Jones, Henry Koziel, Lester Kobzik
Lung injury can release intracellular actin into the alveolar milieu, and is also associated with increased susceptibility to secondary infections. We investigated the effect of free (extracellular) actin on lung macrophage host defense functions. Western blot analysis demonstrated free actin release into the lung lavage fluids of mouse models of ozone injury, influenza infection and secondary pneumococcal pneumonia, and in samples from patients following burn and inhalation injury. Using levels comparable to those observed in lung injury, we found that free actin markedly inhibited murine lung macrophage binding and uptake in vitro of S...
April 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28377587/overexpression-of-gsn-could-decrease-inflammation-and-apoptosis-in-eae-and-may-enhance-vitamin-d-therapy-on-eae-ms
#6
Jifang Gao, Zhaoyu Qin, Xinyuan Guan, Juanjuan Guo, Huaqing Wang, Shilian Liu
The decrease of gelsolin (GSN) in the blood has been reported in multiple sclerosis (MS) patients and experimental allergic encephalomyelitis (EAE) animals, but the protective effect of GSN on EAE/MS lacks of evidence. In our study, we increased the GSN level in EAE by injecting GSN-overexpress lentivirus (LV-GSN) into the lateral ventricle and caudal vein and found that GSN administration can delay the onset and decrease the severity of EAE. Vitamin D is proven to have a therapeutic effect on MS/EAE; however, we previously found that vitamin D caused a downregulation of GSN, which might limit vitamin D efficacy...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28365030/serum-gelsolin-levels-in-aneurismal-subarachnoid-hemorrhage-preliminary-results
#7
A Rodríguez-Rodríguez, J J Egea-Guerrero, Z Ruiz de Azúa-López, G Rivera-Rubiales, Á Vilches-Arenas, F Murillo-Cabezas
No abstract text is available yet for this article.
March 29, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28357579/epithelial-cell-types-and-their-proposed-roles-in-maintaining-the-mucosal-barrier-in-human-chagasic-megacolonic-mucosa
#8
Christian Koch, Alexandre B M da Silveira, Enio C de Oliveira, Karl Quint, Winfried Neuhuber, Axel Brehmer, Samir Jabari
Patients suffering from chagasic megacolon must have an intact mucosal barrier as they survive this chronic disease for decades. A key structure of the mucosal barrier are epithelial cells. Vasoactive-intestinal-peptide (VIP)-positive nerve fibres are involved in influencing, e.g., epithelial cell proliferation, mucus secretion (e.g., mucin 2 and trefoil factor 3 of goblet cells) and inflammation or autoimmunity, all putative and/or known factors altered in chagasic megacolon. We analyzed qualitatively and quantitatively goblet cells, their specific markers, such as mucin 2 (MUC2) and trefoil factor 3 (TFF3) and enterocytes, the relation of VIP-immunoreactive nerve fibres to the epithelia, the distribution of gelsolin, a protein involved in chronic inflammation processes in the epithelia, and the proliferation rate of epithelial cells by combined 4',6-diamidino-2-phenylindole (DAPI) and phosphohistone-H3 (PHH3) staining...
March 29, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28349924/structural-basis-for-ph-mediated-regulation-of-f-actin-severing-by-gelsolin-domain-1
#9
Jing-Song Fan, Honzhen Goh, Ke Ding, Bo Xue, Robert C Robinson, Daiwen Yang
Six-domain gelsolin regulates actin structural dynamics through its abilities to sever, cap and uncap F-actin. These activities are modulated by various cellular parameters like Ca(2+) and pH. Until now, only the molecular activation mechanism of gelsolin by Ca(2+) has been understood relatively well. The fragment comprising the first domain and six residues from the linker region into the second domain has been shown to be similar to the full-length protein in F-actin severing activity in the absence of Ca(2+) at pH 5...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344658/flightless-i-governs-cell-fate-by-recruiting-the-sumo-isopeptidase-senp3-to-distinct-hox-genes
#10
Arnab Nayak, Anja Reck, Christian Morsczeck, Stefan Müller
BACKGROUND: Despite recent studies on the role of ubiquitin-related SUMO modifier in cell fate decisions, our understanding on precise molecular mechanisms of these processes is limited. Previously, we established that the SUMO isopeptidase SENP3 regulates chromatin assembly of the MLL1/2 histone methyltransferase complex at distinct HOX genes, including the osteogenic master regulator DLX3. A comprehensive mechanism that regulates SENP3 transcriptional function was not understood. RESULTS: Here, we identified flightless-I homolog (FLII), a member of the gelsolin family of actin-remodeling proteins, as a novel regulator of SENP3...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28343311/mechanistic-insight-of-platelet-apoptosis-leading-to-non-surgical-bleeding-among-heart-failure-patients-supported-by-continuous-flow-left-ventricular-assist-devices
#11
Nandan K Mondal, Tielou Li, Zengsheng Chen, Hegang H Chen, Erik N Sorensen, Si M Pham, Michael A Sobieski, Steven C Koenig, Mark S Slaughter, Bartley P Griffith, Zhongjun J Wu
Non-surgical bleeding (NSB) is the most common clinical complication in heart failure (HF) patients supported by continuous-flow left ventricular assist devices (CF-LVADs). In this study, oxidative stress and alteration of signal pathways leading to platelet apoptosis were investigated. Thirty-one HF patients supported by CF-LVADs were divided into bleeder (n = 12) and non-bleeder (n = 19) groups. Multiple blood samples were collected at pre-implant (baseline) and weekly up to 1-month post-implant. A single blood sample was collected from healthy subjects (reference)...
March 25, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28334940/aav9-delivered-bispecific-nanobody-attenuates-amyloid-burden-in-the-gelsolin-amyloidosis-mouse-model
#12
Adriaan Verhelle, Nisha Nair, Inge Everaert, Wouter Van Overbeke, Lynn Supply, Olivier Zwaenepoel, Cindy Peleman, Jo Van Dorpe, Tony Lahoutte, Nick Devoogdt, Wim Derave, Marinee K Chuah, Thierry Vanden Driessche, Jan Gettemans
Gelsolin amyloidosis is a dominantly inherited, incurable type of amyloidosis. A single point mutation in the gelsolin gene (G654A is most common) results in the loss of a Ca2+  binding site in the second gelsolin domain. Consequently, this domain partly unfolds and exposes an otherwise buried furin cleavage site at the surface. During secretion of mutant plasma gelsolin consecutive cleavage by furin and MT1-MMP results in the production of 8 and 5 kDa amyloidogenic peptides. Nanobodies that are able to (partly) inhibit furin or MT1-MMP proteolysis have previously been reported...
April 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28331304/does-urinary-peptide-content-differ-between-copd-patients-with-and-without-inherited-alpha-1-antitrypsin-deficiency
#13
Alfonso Carleo, Joanna Chorostowska-Wynimko, Thomas Koeck, Harald Mischak, Małgorzata Czajkowska-Malinowska, Adriana Rozy, Tobias Welte, Sabina Janciauskiene
Differentiating between chronic obstructive pulmonary disease (COPD) patients with normal (PiMM) or deficient (PiZZ) genetic variants of alpha-1 antitrypsin (A1AT) is important not only for understanding the pathobiology of disease progression but also for improving personalized therapies. This pilot study aimed to investigate whether urinary peptides reflect the A1AT-related phenotypes of COPD. Urine samples from 19 clinically stable COPD cases (7 PiMM and 12 PiZZ A1AT) were analyzed by capillary electrophoresis coupled to mass spectrometry...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28255017/cdk6-contributes-to-cytoskeletal-stability-in-erythroid-cells
#14
Iris Z Uras, Ruth M Scheicher, Karoline Kollmann, Martin Glösmann, Michaela Prchal-Murphy, Anca S Tigan, Daniela A Fux, Sandro Altamura, Joana Neves, Martina Muckenthaler, Keiryn L Bennett, Stefan Kubicek, Philip W Hinds, Marieke von Lindern, Veronika Sexl
Mice lacking Cdk6 kinase activity suffer from mild anemia accompanied by elevated numbers of Ter119+ cells in the bone marrow. The animals show hardly any alterations in erythroid development, indicating that Cdk6 is not required for proliferation and maturation of erythroid cells. There is also no difference in stress erythropoiesis following hemolysis in vivo. However, Cdk6-/- erythrocytes have a shortened lifespan and are more sensitive to mechanical stress in vitro, suggesting differences in the cytoskeletal architecture...
March 2, 2017: Haematologica
https://www.readbyqxmd.com/read/28250773/meretoja-s-syndrome-lattice-corneal-dystrophy-gelsolin-type
#15
I Casal, S Monteiro, C Abreu, M Neves, L Oliveira, M Beirão
Lattice corneal dystrophy gelsolin type was first described in 1969 by Jouko Meretoja, a Finnish ophthalmologist. It is caused by an autosomal dominant mutation in gelsolin gene resulting in unstable protein fragments and amyloid deposition in various organs. The age of onset is usually after the third decade of life and typical diagnostic triad includes progressive bilateral facial paralysis, loose skin, and lattice corneal dystrophy. We report a case of a 53-year-old female patient referred to our Department of Ophthalmology by severe dry eye and incomplete eyelid closure...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28242648/identification-of-novel-chondroprotective-mediators-in-resolving-inflammatory-exudates
#16
Magdalena K Kaneva, Karin V Greco, Sarah E Headland, Trinidad Montero-Melendez, Prashant Mori, Kevin Greenslade, Costantino Pitzalis, Adrian Moore, Mauro Perretti
We hypothesized that exudates collected at the beginning of the resolution phase of inflammation might be enriched for tissue protective molecules; thus an integrated cellular and molecular approach was applied to identify novel chondroprotective bioactions. Exudates were collected 6 h (inflammatory) and 24 h (resolving) following carrageenan-induced pleurisy in rats. The resolving exudate was subjected to gel filtration chromatography followed by proteomics, identifying 61 proteins. Fractions were added to C28/I2 chondrocytes, grown in micromasses, ions with or without IL-1β or osteoarthritic synovial fluids for 48 h...
April 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28224917/regulation-of-the-wheat-map-kinase-phosphatase-1-by-14-3-3-proteins
#17
Mouna Ghorbel, Valérie Cotelle, Chantal Ebel, Ikram Zaidi, Mélanie Ormancey, Jean-Philippe Galaud, Moez Hanin
Plant MAP kinase phosphatases (MKPs) are major regulators of MAPK signaling pathways and play crucial roles in controlling growth, development and stress responses. The presence of several functional domains in plant MKPs such as a dual specificity phosphatase catalytic domain, gelsolin, calmodulin-binding and serine-rich domains, suggests that MKPs can interact with distinct cellular partners, others than MAPKs. In this report, we identified a canonical mode I 14-3-3-binding motif (574KLPSLP579) located at the carboxy-terminal region of the wheat MKP, TMKP1...
April 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28208683/plasma-gelsolin-induced-glomerular-fibrosis-via-the-tgf-%C3%AE-1-smads-signal-transduction-pathway-in-iga-nephropathy
#18
Lei Zhang, Changsong Han, Fei Ye, Yan He, Yinji Jin, Tianzhen Wang, Yiqi Wu, Yang Jiang, Fengmin Zhang, Xiaoming Jin
Glomerular fibrosis has been shown to be closely related to the progression and prognosis of IgA nephropathy (IgAN). However, mechanism underlying IgAN glomerular fibrosis remains unclear. Recently, our study showed that plasma gelsolin (pGSN) was decreased in the serum of an IgAN mouse model and that pGSN deposition was found in the glomeruli. Another cytokine, TGF-β1, which is closely related to glomerular fibrosis, was also found to be highly expressed in the glomeruli. In the present study, we report that pGSN induces glomerular fibrosis through the TGF-β1/Smads signal transduction pathway...
February 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28193690/lingo-1-regulates-oligodendrocyte-differentiation-through-the-cytoplasmic-gelsolin-signaling-pathway
#19
Zhaohui Shao, Xinhua Lee, Guanrong Huang, Guoqing Sheng, Christopher E Henderson, Daniel Louvard, Jiho Sohn, Blake Pepinsky, Sha Mi
Differentiation and maturation of oligodendrocyte progenitor cells (OPCs) involve the assembly and disassembly of actin microfilaments. How actin dynamics is regulated during this process remains poorly understood. Leucine rich repeat and Immunoglobulin-like domain-containing Nogo receptor interacting protein 1(LINGO-1) is a negative regulator of OPC differentiation. We discovered that anti-LINGO-1 antibody promoted OPC differentiation was accompanied by upregulation of cytoplasmic gelsolin (cGSN), an abundant actin-severing protein involved in the depolymerization of actin filaments...
February 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28139293/clinical-biopsy-and-mass-spectrometry-findings-of-renal-gelsolin-amyloidosis
#20
Sanjeev Sethi, Surendra Dasari, Md Shahrier Amin, Julie A Vrana, Jason D Theis, Mariam P Alexander, Paul J Kurtin
Gelsolin amyloidosis is a rare type of amyloidosis typically involving the cranial and peripheral nerves, but rarely the kidney. Here we report the clinical, kidney biopsy, and mass spectrometry findings in 12 cases of renal gelsolin amyloidosis. Of the 12 patients, five were men and seven were women with mean age at diagnosis of 63.8 years. Gelsolin amyloidosis was most common in Caucasians (six patients) and Asians (four patients), and included one each African-American and Hispanic patients. Nephrotic syndrome was the most common cause of biopsy, although most patients also had progressive loss of kidney function...
January 27, 2017: Kidney International
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