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Transglutaminase 2

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https://www.readbyqxmd.com/read/28730262/crypt-hyperplastic-enteropathy-in-distal-duodenum-in-helicobacter-pylori-infection-report-of-two-cases-without-evidence-of-celiac-disease
#1
Mariana Jinga, Daniel Vasile Balaban, Ileana Peride, Andrei Niculae, Irina Monica DuŢescu, Florina Vasilescu, Markku Mäki, Alina Mihaela Popp
OBJECTIVES: Patients with Helicobacter pylori (HP) infection have been reported to have in addition to duodenitis architectural changes of the duodenal bulb mucosa including villous atrophy and crypt hyperplasia. We here for the first time present two cases of HP-infected adult patients with a crypt hyperplastic enteropathy also in the distal duodenum mimicking celiac disease (CD). METHODS: We evaluated separately the morphology of the anatomical bulb and distal duodenal mucosa using validated quantitative morphometric tools, i...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28728404/quality-of-steak-restructured-from-beef-trimmings-containing-microbial-transglutaminase-and-impacted-by-freezing-and-grading-by-fat-level
#2
Supaluk Sorapukdee, Pussadee Tangwatcharin
Objective: The objective of this research was to evaluate the physico-chemical, microbiological and sensorial qualities of restructured steaks processed from beef trimmings (grade I and II) and frozen beef (fresh beef as control and frozen beef). Method: Beef trimmings from commercial butcher were collected, designated into 4 treatments differed in beef trimmings grade and freezing, processed into restructured steaks with 1% microbial transglutaminase and then analyzed product quality...
July 17, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28723859/determinants-of-follow-up-care-for-patients-with-celiac-disease
#3
Margot E Cohen, Ariel Jaffe, Carolyn B Strauch, Suzanne K Lewis, Benjamin Lebwohl, Peter H R Green
GOALS: This study aimed to investigate follow-up patterns among celiac disease (CD) patients. BACKGROUND: Gender factors are important in CD with women diagnosed more frequently than men despite equal seropositivity in screening studies. To determine if gender influences postdiagnosis care, we performed a retrospective cohort study investigating the impact of gender and mode of presentation on follow-up patterns after diagnosis. STUDY: The study included adults with biopsy-proven CD presenting to a single tertiary care center between 2005 and 2014...
July 18, 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/28721692/left-ventricular-mechanics-are-affected-in-children-with-celiac-disease-a-study-based-on-two-dimensional-speckle-tracking-echocardiography
#4
Murat Deveci, Ayşen Uncuoğlu Aydoğan, Gürkan Altun, Özlem Kayabey, Okan Tuğral, Kadir Babaoğlu
BACKGROUND: An association between cardiomyopathy and celiac disease has been reported, but not frequently. We examined the effects on cardiac mechanics in children with celiac disease (CD) by two-dimensional speckle tracking echocardiography (2DSTE). METHODS: Eighty-one children with CD were compared with a control group comprising 51 healthy children by echocardiographic examination. Children with CD who had been on gluten-free diet for more than 6 months were divided into two different groups: group 1 was positive for serum antitissue transglutaminase antibody (n=48), and group 2 was negative for serum antitissue transglutaminase antibody (n=33)...
July 18, 2017: Echocardiography
https://www.readbyqxmd.com/read/28715877/prognostic-value-of-transglutaminase-2-in-non-small-cell-lung-cancer-patients
#5
Zhu Chihong, Ling Yutian, Wan Danying, Jiang Ruibin, Sheng Huaying, Gu Linhui, Feng Jianguo
Transglutaminase 2 (TG2) plays important roles in cell survival and cancer progression. In this study, we examined TG2 expression in specimen of 194 patients diagnosed with non-small cell lung cancer (NSCLC), and found that the TG2 gene expression was significantly higher in lung cancer tissues as compared to paired incisal marginal tissues or normal tissues. Our data revealed that patients with lower level of TG2 expression detected in cancer tissues had longer disease free survival and overall survival as compared to the patients with higher TG2 expression...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28711023/gingival-crevicular-fluid-and-plasma-oxidative-stress-markers-and-tgm-2-levels-in-chronic-periodontitis
#6
Sema Becerik, Veli Özgen Öztürk, Peter Celec, Natalia Kamodyova, Gül Atilla, Gülnur Emingil
OBJECTIVE: This study was aimed to evaluate the gingival crevicular fluid (GCF) and plasma transglutaminase-2 (TGM-2), total antioxidant capacity (TAC), total oxidant status (TOS), ferric reducing antioxidant power (FRAP) and thiobarbituric acid reactive substances (TBARS) in patients with chronic periodontal disease. MATERIALS AND METHODS: Twenty patients with chronic periodontitis (CP), 20 patients with gingivitis and 20 healthy subjects were enrolled in the study...
June 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28695286/the-roles-of-mhc-class-ii-genes-and-post-translational-modification-in-celiac-disease
#7
REVIEW
Ludvig M Sollid
Our increasing understanding of the etiology of celiac disease, previously considered a simple food hypersensitivity disorder caused by an immune response to cereal gluten proteins, challenges established concepts of autoimmunity. HLA is a chief genetic determinant, and certain HLA-DQ allotypes predispose to the disease by presenting posttranslationally modified (deamidated) gluten peptides to CD4(+) T cells. The deamidation of gluten peptides is mediated by transglutaminase 2. Strikingly, celiac disease patients generate highly disease-specific autoantibodies to the transglutaminase 2 enzyme...
July 10, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28687275/avoidance-of-cow-s-milk-based-formula-for-at-risk-infants-does-not-reduce-development-of-celiac-disease-a-randomized-controlled-trial
#8
Mila Hyytinen, Erkki Savilahti, Suvi M Virtanen, Taina Härkönen, Jorma Ilonen, Kristiina Luopajärvi, Raivo Uibo, Outi Vaarala, Hans K Åkerblom, Mikael Knip
BACKGROUND & AIMS: Feeding during first months of life might affect risk of celiac disease. Individuals with celiac disease or type 1 diabetes have been reported to have high titers of antibodies against cow´s milk proteins. Avoidance of cow's milk-based formula for infants with genetic susceptibility for type 1 diabetes reduced the cumulative incidence of diabetes-associated autoantibodies. We performed a randomized controlled trial, in the same population, to study whether weaning to an extensively hydrolyzed formula reduced the risk of celiac disease autoimmunity or celiac disease...
July 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28684792/fungus-derived-hydroxyl-radicals-kill-hepatic-cells-by-enhancing-nuclear-transglutaminase
#9
Ronak Shrestha, Rajan Shrestha, Xian-Yang Qin, Ting-Fang Kuo, Yugo Oshima, Shun Iwatani, Ryutaro Teraoka, Keisuke Fujii, Mitsuko Hara, Mengqian Li, Azusa Takahashi-Nakaguchi, Hiroji Chibana, Jun Lu, Muyi Cai, Susumu Kajiwara, Soichi Kojima
We previously reported the importance of induced nuclear transglutaminase (TG) 2 activity, which results in hepatic cell death, in ethanol-induced liver injury. Here, we show that co-incubation of either human hepatic cells or mouse primary hepatocytes derived from wild-type but not TG2(-/-) mice with pathogenic fungi Candida albicans and C. glabrata, but not baker's yeast Saccharomyces cerevisiae, induced cell death in host cells by enhancing cellular, particularly nuclear, TG activity. Further pharmacological and genetic approaches demonstrated that this phenomenon was mediated partly by the production of reactive oxygen species (ROS) such as hydroxyl radicals, as detected by a fluorescent probe and electron spin resonance...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28680807/calcium-dependent-activation-of-transglutaminase-2-by-nanosecond-pulsed-electric-fields
#10
Keiko Morotomi-Yano, Ken-Ichi Yano
Exposure of cultured human cells to nanosecond pulsed electric fields (nsPEFs) elicits various cellular events, including Ca(2+) influx and cell death. Recently, nsPEFs have been regarded as a novel physical treatment useful for biology and medicine, but the underlying mechanism of action remains to be fully elucidated. In this study, we investigated the effect of nsPEFs on transglutaminases (TGs), enzymes that catalyze covalent protein modifications such as protein-protein crosslinking. Cellular TG activity was monitored by conjugation of cellular proteins with biotin-cadaverine, a cell-permeable pseudosubstrate for TGs...
July 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28677093/structural-aspects-of-transglutaminase-2-functional-structural-and-regulatory-diversity
#11
REVIEW
Chang Sup Lee, Hyun Ho Park
Transglutaminase 2 (TG2) is a multi-functional protein that has both protein cross-linking and guanosine 5'-triphosphate (GTP) hydrolysis activities. The activities of this protein are controlled by many cellular factors, including calcium (Ca(2+)) and GTP, and have been implicated in several physiological activities, including apoptosis, angiogenesis, wound healing, cellular differentiation, neuronal regeneration, and bone development. TG2 is linked to many human diseases such as inflammatory disease, celiac disease, neurodegenerative disease, diabetes, tissue fibrosis, and various cancers and is one of the most dynamic enzymes in terms of its functions, structures, and regulatory mechanisms...
July 4, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28676444/the-expression-of-transglutaminase-2-tg-2-in-oral-squamous-cell-carcinoma-and-its-clinical-significance
#12
Elva Lim, Cheng-Hsien Wu, Sin-Hua Moi, Man-Tin Lui, Cheng-Hong Yang, Cheng-Chieh Yang
BACKGROUND: Glutamine has a very important role in the human body, including pH balance in an acidic environment, as well as supporting the TCA cycle in cancer cell growth. However, the expression of transglutaminase-2 (TG-2) in oral cancer growth related to renal function is unknown. Here we examined TG-2 and its expression as a prognostic tool. METHODS: Fifty-six oral squamous cell carcinoma (OSCC) tissues were collected with the inclusion of tumor in any region of oral area, and patients with creatinine (Cr) and blood urea nitrogen (BUN) results...
July 1, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28662476/effect-of-crosslinking-on-the-physical-and-chemical-properties-of-%C3%AE-lactoglobulin-blg-microgels
#13
Ryan W Murphy, Brian E Farkas, Owen G Jones
HYPOTHESIS: Microgels assembled from the protein β-lactoglobulin are colloidal structures with potential applications in food materials. Modifying the internal crosslinking within these microgels using enzymatic or chemical treatments should affect dissolution, swelling, and viscous attributes under strongly solvating conditions. EXPERIMENTS: Microgels were treated with citric acid, glutaraldehyde and transglutaminase to induce cross-linking or with tris(2-carboxyethyl)phosphine to reduce disulfide linkages...
June 23, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28655072/oral-administration-of-glycine-and-leucine-dipeptides-improves-skin-hydration-and-elasticity-in-uvb-irradiated-hairless-mice
#14
Jong Il Park, Ji Eun Lee, Hyun Jun Shin, Soonran Song, Won Kyung Lee, Jae Sung Hwang
Placenta is a special organ that contains many nutrients such as growth factors, minerals, and bioactive peptides. Dipeptides of glycine and leucine are major components of porcine placenta extracts (PPE) that has been used as an alternative of human placenta extracts. In this study, we investigated whether major peptides of PPE, Glycyl-L-Leucine (Gly-Leu), L-Leucyl-Glycine (Leu-Gly), and L-Leucyl-L-Leucine (Leu-Leu), affect skin hydration and elasticity in vitro and in vivo. We found that Gly-Leu and Leu-Gly dipeptides induced the expression of transglutaminase 1 in normal human epidermal keratinocytes (NHEKs) whereas Leu-Leu dipeptides did not...
June 27, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28644352/elevated-serum-tissue-transglutaminase-antibodies-in-children-with-eosinophilic-esophagitis
#15
Anna K Le Fevre, Marjorie M Walker, Amir Hadjiashrafy, Rani Bhatia, Joerg Mattes, Nicholas J Talley, Scott Nightingale
OBJECTIVES: This study compared the clinical and histopathological characteristics of children with eosinophilic esophagitis (EoE) and elevated anti-transglutaminase (TTG Ab) with those with EoE and normal TTG Ab titres. METHODS: Single-center chart and blinded histopathological review of patients diagnosed with EoE for a 4-year period, who had esophageal and duodenal biopsies taken at time of endoscopy, and TTG Ab measured within 6 months of biopsy. Patients with histology-proven CD were excluded...
July 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28638585/clinicopathological-study-of-seronegative-celiac-disease-in-adults-in-pakistan-a-pilot-study
#16
Mohammad Hanif Farina, Rajesh Kumar Mandhwani, Nasir Hassan Luck, Zaigham Abbas, Muhammed Mubarak, S Mudassir Laeeq, Abbas Ali Tasneem
BACKGROUND Celiac disease (CD) is usually missed, if the serology is negative. We aimed to evaluate the clinicopathological characteristics of seronegative CD (SNCD) and its response to gluten-free diet (GFD) in adult patients. METHODS This observational study was carried out at the Department of Hepatogastroenterology, Sindh Institute of Urology and Transplantation, Karachi, Pakistan from 2009 to 2015. All consecutive adult patients (≥17 years) with features of marked villous atrophy (Marsh class≥III) on duodenal biopsy, negative tissue transglutaminase IgA and IgG antibodies (anti-tTg IgA and IgG) and human leukocyte antigen (HLA) DQ2 or DQ8 serotypes were studied...
April 2017: Middle East Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28624578/accuracy-in-diagnosis-of-celiac-disease-without-biopsies-in-clinical-practice
#17
K J Werkstetter, I R Korponay-Szabó, A Popp, V Villanacci, M Salemme, G Heilig, S T Lillevang, M L Mearin, C Ribes-Koninckx, A Thomas, R Troncone, B Filipiak, M Mäki, J Gyimesi, M Najafi, J Dolinšek, S Dydensborg Sander, R Auricchio, A Papadopoulou, A Vécsei, P Szitanyi, E Donat, R Nenna, Ph Alliet, F Penagini, H Garnier-Lengliné, G Castillejo, K Kurppa, R Shamir, A C Hauer, F Smets, S Corujeira, M van Winckel, S Buderus, S Chong, S Husby, S Koletzko, Piotr Socha, Bozena Cukrowska, Hania Szajewska, Jan Wyhowski, Nailah Brown, Gauri Batra, Zrinjka Misak, Sven Seiwerth, Yulia Dmitrieva, Dmitry Abramov, Yvan Vandenplas, Annieta Goossens, Maaike W Schaart, V T H B M Smit, Nicolas Kalach, Pierre Gosset, Judit B Kovács, Anikó Nagy, Ilona Lellei, Rita Kőbányai, Katayoun Khatami, Maryam Monajemzadeh, Konstantina Dimakou, Amalia Patereli, Tine Plato Hansen, Rajko Kavalar, Miguel Bolonio, Hubert Kogler, Gabriele Amann, Roberta Kosova, Mariantonia Maglio, Elke Janssens, Ruth Achten, Pavel Frűhauf, Helena Skálová, Thomas Kirchner, Laura Petrarca, Fabio Massimo Magliocca, Francesc Martínez, Vanesa Morente, Sonja Thanner-Lechner, Manfred Ratschek, Marco Gasparetto, Liz Hook, Danielle Canioni, Catherine Wanty, Anne Mourin, Kaija Laurila, Martine Vornane, Vered Nachmias Friedler, Sara L Morgenstern, Jorge Amil Dias, Fátima Carneiro, Stephanie Van Biervliet, Saskia Vande Velde, Hany Banoub, Steve Sampson, Annette M Müller, Adina Ene, Mandana Rafeey, Iran Amir Taher Eftekhar Sadat
BACKGROUND & AIMS: The guidelines of the European Society of Pediatric Gastroenterology, Hepatology, and Nutrition allow for diagnosis of celiac disease without biopsies in children with symptoms and levels of immunoglobulin A against tissue-transglutaminase (TGA-IgA) 10-fold or more the upper limit of normal (ULN), confirmed by detection of endomysium antibodies (EMA) and positivity for HLA-DQ2/DQ8. We performed a large, international prospective study to validate this approach. METHODS: We collected data from consecutive pediatric patients (18 years or younger) on a gluten-containing diet who tested positive for TGA-IgA from November 2011 through May 2014, seen at 33 pediatric gastroenterology units in 21 countries...
June 15, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28606713/rhabdomyolysis-and-coeliac-disease-a-causal-or-casual-association-a-case-report-and-review-of-literature
#18
Claudia Mandato, Alessandro Rossi, Mariano Caldore, Marta Lamba, Michele Rocco, Renata Auricchio, Pietro Vajro, Paolo Siani
BACKGROUND: Rhabdomyolysis is a rare, potentially life-threatening condition, caused by multiple disorders. The association with Coeliac Disease (CD) has been rarely reported and in these cases muscular damage was imputed to hypokalemia. Herein we describe a new case of severe rhabdomyolysis in a child subsequently diagnosed as affected by CD, and review previous reports. CASE PRESENTATION: A 3-year-old boy was referred for diarrhea, brown urine, muscular pain/weakness, and no history of muscular trauma...
June 9, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28600290/high-throughput-single-cell-analysis-of-b-cell-receptor-usage-among-autoantigen-specific-plasma-cells-in-celiac-disease
#19
Bishnudeo Roy, Ralf S Neumann, Omri Snir, Rasmus Iversen, Geir Kjetil Sandve, Knut E A Lundin, Ludvig M Sollid
Characterization of Ag-specific BCR repertoires is essential for understanding disease mechanisms involving humoral immunity. This is optimally done by interrogation of paired H chain V region (VH) and L chain V region (VL) sequences of individual and Ag-specific B cells. By applying single-cell high-throughput sequencing on gut lesion plasma cells (PCs), we have analyzed the transglutaminase 2 (TG2)-specific VH:VL autoantibody repertoire of celiac disease (CD) patients. Autoantibodies against TG2 are a hallmark of CD, and anti-TG2 IgA-producing gut PCs accumulate in patients upon gluten ingestion...
June 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28576718/effect-of-altered-haemodynamics-on-the-developing-mitral-valve-in-chick-embryonic-heart
#20
Kar Lai Pang, Matthew Parnall, Siobhan Loughna
Intracardiac haemodynamics is crucial for normal cardiogenesis, with recent evidence showing valvulogenesis is haemodynamically dependent and inextricably linked with shear stress. Although valve anomalies have been associated with genetic mutations, often the cause is unknown. However, altered haemodynamics have been suggested as a pathogenic contributor to bicuspid aortic valve disease. Conversely, how abnormal haemodynamics impacts mitral valve development is still poorly understood. In order to analyse altered blood flow, the outflow tract of the chick heart was constricted using a ligature to increase cardiac pressure overload...
May 30, 2017: Journal of Molecular and Cellular Cardiology
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