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https://www.readbyqxmd.com/read/28936777/phytosphingosine-enhances-moisture-level-in-human-skin-barrier-through-stimulation-of-the-filaggrin-biosynthesis-and-degradation-leading-to-nmf-formation
#1
Hyun Kyung Choi, Young Hoon Cho, Eun Ok Lee, Jin Wook Kim, Chang Seo Park
Phytosphingosine (PHS) is a sphingoid that is a key component of phytoceramides NP, AP and EOP. PHS has been known to have anti-inflammation and antimicrobial activities and to stimulate epidermal differentiation. In addition, it is reported that PHS treatment notably increased phytoceramide content in keratinocytes. In this study, we tried to investigate whether PHS has any effect on the maturation of corneocytes such as formation of cornified envelope and natural moisturizing factor (NMF) that is also an essential event during the formation of skin barrier, stratum corneum...
September 21, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28934387/mutations-in-tgm6-induce-the-unfolded-protein-response-in-sca35
#2
Debasmita Tripathy, Beatrice Vignoli, Nandini Ramesh, Maria Jose Polanco, Marie Coutelier, Christopher D Stephen, Marco Canossa, Marie-Lorraine Monin, Pascale Aeschlimann, Shannon Turberville, Daniel Aeschlimann, Jeremy D Schmahmann, Marios Hadjivassiliou, Alexandra Durr, Udai B Pandey, Maria Pennuto, Manuela Basso
Spinocerebellar ataxia type 35 (SCA35) is a rare autosomal-dominant neurodegenerative disease caused by mutations in the TGM6 gene, which codes for transglutaminase 6 (TG6). Mutations in TG6 induce cerebellar degeneration by an unknown mechanism. We identified seven patients bearing new mutations in TGM6. To gain insights into the molecular basis of mutant TG6-induced neurotoxicity, we analyzed all the seven new TG6 mutants and the five TG6 mutants previously linked to SCA35. We found that the wild-type (TG6-WT) protein mainly localized to the nucleus and perinuclear area, whereas five TG6 mutations showed nuclear depletion, increased accumulation in the perinuclear area, insolubility and loss of enzymatic function...
October 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28934109/intestinal-production-of-anti-tissue-transglutaminase-2-antibodies-in-patients-with-diagnosis-other-than-celiac-disease
#3
Mariantonia Maglio, Fabiana Ziberna, Rosita Aitoro, Valentina Discepolo, Giuliana Lania, Virginia Bassi, Erasmo Miele, Tarcisio Not, Riccardo Troncone, Renata Auricchio
It has been hypothesized that gluten-dependent production of anti-tissue-transglutaminase 2 (anti-TG2) antibodies may occur only at an intestinal level. We have investigated intestinal production of anti-TG2 antibodies in 136 patients with normal serum levels of anti-TG2 antibodies and normal duodenal mucosa. Intestinal deposits of anti-TG2 antibodies were evaluated by immunofluorescence and anti-TG2 antibodies released in organ culture supernatants measured by ELISA. Intestinal antibody libraries were obtained from 10 subjects...
September 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28915550/transglutaminase-in-neurological-disease
#4
EDITORIAL
Guylaine Hoffner, Philippe Djian
No abstract text is available yet for this article.
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915348/activation-of-factor-xiii-is-accompanied-by-a-change-in-oligomerization-state
#5
Boris A Anokhin, Vilius Stribinskis, William L Dean, Muriel C Maurer
Factor XIII A (FXIIIA) is a member of the transglutaminase enzyme family that cross-links both intra- and extracellular protein substrates. To prevent undesired cross-linking, FXIIIA is expressed as an inactive zymogen and exists intracellularly as an A2 homodimer. In plasma, FXIII A2 is complexed with two protective factor XIII B subunits (A2 B2 ) that dissociate upon activation of the zymogen. Based on limited experimental data, activated FXIII was considered a dimer of two catalytically active A subunits...
September 15, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28914468/the-toxic-alpha-gliadin-peptide-31-43-enters-cells-without-a-surface-membrane-receptor
#6
Paolella Gaetana, Lepretti Marilena, Martucciello Stefania, Nanayakkara Merlin, Auricchio Salvatore, Esposito Carla, Barone Maria Vittoria, Caputo Ivana
Alpha-gliadin peptide 31-43 is considered to be the main peptide responsible for the innate immune response in celiac disease patients. Recent evidence indicates that peptide 31-43 rapidly enters cells and interacts with the early endocytic vesicular compartment. However, the mechanism of its uptake is not completely understood. Our aim is to characterize, isolate and identify possible cell surface proteins involved in peptide 31-43 internalization by Caco-2 cells. In this study, we used a chemical cross-linker to block peptide 31-43 on cell surface proteins, and pulled-down peptide-proteins complexes using antibodies raised against peptide 31-43...
September 15, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28913337/new-insights-into-the-pathogenesis-of-celiac-disease
#7
REVIEW
Valli De Re, Raffaella Magris, Renato Cannizzaro
Celiac disease (CD) is an autoimmune and multisystem gluten-related disorder that causes symptoms involving the gastrointestinal tract and other organs. Pathogenesis of CD is only partially known. It had been established that ingestion of gluten proteins present in wheat and other cereals are necessary for the disease and develops in individuals genetically predisposed carrying the DQ2 or DQ8 human leukocyte antigen haplotypes. In this review, we had pay specific attention on the last discoveries regarding the three cellular components mainly involved in the development and maintenance of CD: T-cells, B-cells, and microbioma...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28899816/enzyme-crosslinked-gene-activated-matrix-for-the-induction-of-mesenchymal-stem-cells-in-osteochondral-tissue-regeneration
#8
Yi-Hsuan Lee, Hsi-Chin Wu, Chia-Wei Yeh, Chen-Hsiang Kuan, Han-Tsung Liao, Horng-Chaung Hsu, Jui-Che Tsai, Jui-Sheng Sun, Tzu-Wei Wang
The development of osteochondral tissue engineering is an important issue for the treatment of traumatic injury or aging associated joint disease. However, the different compositions and mechanical properties of cartilage and subchondral bone show the complexity of this tissue interface, making it challenging for the design and fabrication of osteochondral graft substitute. In this study, a bilayer scaffold is developed to promote the regeneration of osteochondral tissue within a single integrated construct...
September 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28898047/transglutaminase-catalyzed-bioconjugation-using-one-pot-metal-free-bioorthogonal-chemistry
#9
Natalie M Rachel, Jacynthe L Toulouse, Joelle N Pelletier
General approaches for controlled protein modification are increasingly sought-after in the arena of chemical biology. Here, using bioorthogonal reactions, we present combinatorial chemoenzymatic strategies to effectuate protein labeling. Three metal-free conjugations were simultaneously or sequentially incorporated in a one-pot format with microbial transglutaminase (MTG) to effectuate protein labeling. MTG offers the particularity of conjugating residues with-in a protein sequence, rather than at its extremities, providing a route to labeling the native protein...
September 12, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28894523/correlation-between-cut-off-level-of-tissue-transglutaminase-antibody-and-marsh-classification
#10
Sumeet Kaur, Seema Gupta, Bela Goyal, Jasbinder Kaur
No abstract text is available yet for this article.
July 2017: Middle East Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28889146/celiac-disease-in-saudi-children-evaluation-of-clinical-features-and-diagnosis
#11
Anjum Saeed, Asaad Assiri, Hebah Assiri, Anhar Ullah, Mohsin Rashid
 Objectives: To characterize the clinical presentations and diagnosis including serological tests and histopathological findings in children with celiac disease. Methods: All children (less than 18 years) with confirmed celiac disease diagnosed over a 6 year period at a private tertiary care health care center in Riyadh,  Saudi Arabia were studied retrospectively. Information collected included demographics, clinical presentation and diagnostic modalities with serology and small intestinal histology reported by Marsh grading...
September 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28886934/transglutaminase-6-antibodies-in-gluten-neuropathy
#12
Panagiotis Zis, Dasappaiah Ganesh Rao, Ptolemaios Georgios Sarrigiannis, Pascale Aeschlimann, Daniel P Aeschlimann, David Sanders, Richard A Grünewald, Marios Hadjivassiliou
BACKGROUND: TG6 antibodies have been shown to be a marker of gluten ataxia but their presence in the context of other neurological manifestations of gluten sensitivity has not been explored. We investigated the presence of TG6 antibodies in gluten neuropathy (GN), defined as as an otherwise idiopathic peripheral neuropathy associated with serological markers of gluten sensitivity (one or more of antigliadin IgG and/or IgA, endomysial and transglutaminase-2 antibodies). METHODS: This was a cross-sectional study conducted at the Sheffield Institute of Gluten Related Diseases, Royal Hallamshire Hospital, Sheffield, UK...
August 10, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28880274/the-functional-relationship-between-transglutaminase-2-and-transforming-growth-factor-%C3%AE-1-in-the-regulation-of-angiogenesis-and-endothelial-mesenchymal-transition
#13
Zhuo Wang, Mileidys Perez, Eun-Seo Lee, Soichi Kojima, Martin Griffin
The importance of transglutaminase 2 (TG2) in angiogenesis has been highlighted in recent studies, but other roles of this multi-functional enzyme in endothelial cell (EC) function still remains to be fully elucidated. We previously showed that the extracellular TG2 is involved in maintaining tubule formation in ECs by a mechanism involving matrix-bound vascular endothelial growth factor (VEGF) signalling. Here, by using the ECs and fibroblast co-culture and ECs 3D culture models, we demonstrate a further role for TG2 in both endothelial tubule formation and in tubule loss, which involves its role in the regulation of transforming growth factor β1 (TGFβ1) and Smad signalling...
September 7, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28878266/transglutaminase-2-regulates-osteoclast-differentiation-via-a-blimp1-dependent-pathway
#14
Woo-Shin Kim, Haemin Kim, Eui Man Jeong, Hyung Joon Kim, Zang Hee Lee, In-Gyu Kim, Hong-Hee Kim
Transglutaminase 2 (TG2) performs multiple reactions, including transamidation, and also plays a role in signal transduction as a GTP-binding protein. In this study, we reveal that TG2 controls osteoclast differentiation and bone homeostasis in mice. Osteoclasts specifically expressed the TG2 isoform among eight TG family members. Suppression in TG2 expression with siRNA led to increased osteoclast formation from primary mouse precursor cells in response to receptor activator of nuclear factor kappaB ligand (RANKL)...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28878138/stereotyped-antibody-responses-target-posttranslationally-modified-gluten-in-celiac-disease
#15
Omri Snir, Xi Chen, Moriah Gidoni, M Fleur du Pré, Yuguang Zhao, Øyvind Steinsbø, Knut Ea Lundin, Gur Yaari, Ludvig M Sollid
The role of B cells and posttranslational modifications in pathogenesis of organ-specific immune diseases is increasingly envisioned but remains poorly understood, particularly in human disorders. In celiac disease, transglutaminase 2-modified (TG2-modified; deamidated) gluten peptides drive disease-specific T cell and B cell responses, and antibodies to deamidated gluten peptides are excellent diagnostic markers. Here, we substantiate by high-throughput sequencing of IGHV genes that antibodies to a disease-specific, deamidated, and immunodominant B cell epitope of gluten (PLQPEQPFP) have biased and stereotyped usage of IGHV3-23 and IGHV3-15 gene segments with modest somatic mutations...
September 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/28877470/strong-clonal-relatedness-between-serum-and-gut-iga-despite-different-plasma-cell-origins
#16
Rasmus Iversen, Omri Snir, Maria Stensland, José E Kroll, Øyvind Steinsbø, Ilma R Korponay-Szabó, Knut E A Lundin, Gustavo A de Souza, Ludvig M Sollid
Mucosal antigens induce generation of lamina propria plasma cells (PCs) that secrete dimeric immunoglobulin A (IgA) destined for transport across the epithelium. In addition, blood contains monomeric IgA. To study the relationship between mucosal and systemic antibody responses, we took advantage of celiac disease patient samples for isolation of gut PCs as well as serum IgA and IgG reactive with a gluten-derived peptide or the autoantigen transglutaminase 2. Proteomic analysis of serum IgA revealed antigen-specific V-gene preferences, which matched those found in gut PCs...
September 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28876922/rheological-enhancement-of-pork-myofibrillar-protein-lipid-emulsion-composite-gels-via-glucose-oxidase-oxidation-transglutaminase-cross-linking-pathway
#17
Xu Wang, Youling L Xiong, Hiroaki Sato
Porcine myofibrillar protein (MP) was modified with glucose oxidase (GluOx)-iron that produces hydroxyl radicals then subjected to microbial transglutaminase (TGase) cross-linking in 0.6 M NaCl at 4 °C. The resulting aggregation and gel formation of MP were examined. The GluOx-mediated oxidation promoted the formation of both soluble and insoluble protein aggregates via disulfide bonds and occlusions of hydrophobic groups. The subsequent TGase treatment converted protein aggregates into highly cross-linked polymers...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28866981/carpal-spasm-in-a-girl-as-initial-presentation-of-celiac-disease-a-case-report
#18
Atifete Ramosaj-Morina, A Keka-Sylaj, V Hasbahta, A Baloku-Zejnullahu, M Azemi, R Zunec
BACKGROUND: Celiac disease is an immune-mediated disorder elicited by ingestion of gluten in genetically susceptible persons. This disorder is characterized by specific histological changes of the small intestine mucosa resulting in malabsorption. This case was written up as it was an unusual and dramatic presentation of celiac disease. CASE PRESENTATION: We report the case of a 3-year-old Albanian girl who presented at our clinic with carpal spasms and hand paresthesia...
September 4, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28865110/the-effect-of-photodamage-on-the-female-caucasian-facial-stratum-corneum-corneome-using-mass-spectrometry-based-proteomics
#19
Rainer Voegeli, Jean-Marc Monneuse, Rotraut Schoop, Beverley Summers, Anthony V Rawlings
BACKGROUND: The effect of photodamage on facial stratum corneum (SC) is still poorly understood. OBJECTIVE: To describe the SC proteome from tape strippings of Caucasian SC from photoexposed cheek and photoprotected post auricular (PA) site a global analysis of photodamage on the skin will be developed leading to a better understanding of keratinocyte signalling pathways and identification of new molecular targets for the treatment of photoaged skin. METHODS: Female Caucasian subjects had 9 consecutive tape strippings taken from their cheeks and PA site...
September 2, 2017: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/28858494/structure-activity-relationships-of-potent-targeted-covalent-inhibitors-that-abolish-both-the-transamidation-and-gtp-binding-activities-of-human-tissue-transglutaminase
#20
Abdullah Akbar, Nicole M R McNeil, Marie R Albert, Viviane Ta, Gautam Adhikary, Karine Bourgeois, Richard L Eckert, Jeffrey W Keillor
Human tissue transglutaminase (hTG2) is a multifunctional enzyme. It is primarily known for its calcium-dependent transamidation activity that leads to formation of an isopeptide bond between glutamine and lysine residues found on the surface of proteins, but it is also a GTP binding protein. Overexpression and unregulated hTG2 activity have been associated with numerous human diseases, including cancer stem cell survival and metastatic phenotype. Herein, we present a series of targeted covalent inhibitors (TCIs) based on our previously reported Cbz-Lys scaffold...
September 14, 2017: Journal of Medicinal Chemistry
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