Transglutaminases catalyze the cross-linking and amine incorporation of proteins, and are implicated in various biological phenomena. Previously, we found a high molecular mass transglutaminase-inhibitory substance produced by Streptomyces lavendulae Y-200 that appeared to be a melanin substance. Here, we report that synthetic tyrosine melanin inhibited various types of transglutaminases. Tyros...

Transglutaminases are a class of enzymes capable of covalently cross-linking both intracellular and extracellular proteins. The activity of tissue transglutaminase is known to decrease precipitously following neoplastic transformation, and it has been hypothesized that transglutaminase may be involved in growth regulation. We have found that the differentiation promoter sodium butyrate is able ...

We have investigated the role of DNA methylation in the regulation of the expression of the human tissue transglutaminase gene. Studies on the methylation of the transglutaminase promoter in normal and neoplastic human cells demonstrated that the promoter is methylated in vivo and hypomethylation of the promoter is correlated with constitutive gene expression. Demethylation of the promoter in v...

  Background and Objective: Celiac disease is an autoimmune disorder, characterized by inflammation, villous atrophy, and crypt hyperplasia of the small bowel mucosa. In this study we considered and compared sensitivity and specificity of serological tests in patients with celiac disease. Materials and Methods: In this cross-sectional study we prospectively recruited children with suspected c...

Retinoic acid has been shown to induce large accumulations of tissue transglutaminase in cultured myeloid cells. Addition of retinoic acid to mouse resident peritoneal macrophages increased the level of tissue transglutaminase mRNA within 30-60 min. Retinoic acid also increased tissue transglutaminase mRNA levels in human promyelocytic leukemia (HL-60) cells. These studies show that retinoic ac...

Minor beta thalassemia is a common condition in children. The aim of the present study was the investigation of serum tissue transglutaminase IgA level as potential celiac disease in patients with thalassemia minor. This case control study was conducted on patients with beta thalassemia minor and healthy children in the years of 2014 to 2015. A total of 300 children were enrolled and IgA and ti...

Transglutaminase 4 has been shown to enhance various biological properties of prostate cancer cells, e.g., cell-matrix adhesion, invasiveness and the epithelial-mesenchymal transition. The objectives of this study were to investigate the associations between transglutaminase 4 expression and the established features and biochemical recurrence of prostate cancer. Transglutaminase 4 immunostainin...

BACKGROUND Coeliac disease is defined as a state of immune-mediated hyper-responsiveness to dietary gluten from wheat, barley, or rye in genetically predisposed individuals that results in tissue damage. The diagnosis is made by microscopic examination of a small intestinal biopsy, although serological testing for antibodies against tissue transglutaminase and deamidated gliadin peptide can be ...

BACKGROUND Tissue transglutaminase is now recognized as the autoantigen for antiendomysial antibodies. Antibodies to tissue transglutaminase have been proposed as a valuable test for coeliac disease. OBJECTIVE To determine the value of antibodies to tissue transglutaminase in the diagnosis of coeliac disease in our outpatient population. METHODS Patients who underwent serological tests for ...

celiac disease has been associated with other autoimmune disorders such as autoimmune hepatitis, moreover it is known that t cell mediated immune response to dietary gluten and released cytokines are important for the entheropathy seen in celiac disease. we investigated celiac autoantibodies in patients with autoimmune hepatitis (aih), and chronic hepatitis b (chb). sera from 84 patients with a...