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The biogenic amines putrescine and cadaverine show in vitro cytotoxicity at concentrations that can be found in foods.

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Putrescine and cadaverine are among the most common biogenic amines (BA) in foods, but it is advisable that their accumulation be avoided. Present knowledge about their toxicity is, however, limited; further research is needed if qualitative and quantitative risk assessments for foods are to be

Naphthoimidazoles promote different death phenotypes in Trypanosoma cruzi.

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CONCLUSIONS In a screening of 65 derivatives of natural quinones using bloodstream trypomastigotes of Trypanosoma cruzi, the 3 naphthoimidazoles derived from beta-lapachone - N1, N2 and N3--were selected as the most active. Investigation of their mode of action led to the characterization of

Detection of in situ activation of transglutaminase during apoptosis: correlation with the cell cycle phase by multiparameter flow and laser scanning cytometry.

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BACKGROUND One of the hallmarks of apoptosis is activation of tissue transglutaminase (Tgase; also called transglutaminase type 2 [TGase 2]). Its activation causes cross-linking of cytoplasmic proteins, making them insoluble and presumably less immunogenic. Several biochemical and cytochemical

Consumption effect of a synbiotic beverage made from soy and yacon extracts containing Bifidobacterium animalis ssp. lactis BB-12 on the intestinal polyamine concentrations in elderly individuals.

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This study aimed to investigate the effect of a synbiotic beverage made from soy and yacon (Smallanthus sonchifolius) extracts containing Bifidobacterium animalis ssp. lactis BB-12 on healthy elderly individuals' intestinal polyamine concentrations. A randomized, double-blinded, placebo-controlled

The mechanism of the inhibitory effect of polyamines on the induction of nitric oxide synthase: role of aldehyde metabolites.

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1. We have recently found that in the presence, but not in the absence, of foetal calf serum, spermine inhibits the production of nitric oxide (NO) in cultured J774.2 macrophages stimulated with bacterial endotoxin (lipopolysaccharide; LPS) or with gamma-interferon (IFN), showing that polyamines may

Inhibition of receptor internalization attenuates the TNFalpha-induced ROS generation in non-phagocytic cells.

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Reactive oxygen species (ROS) are important regulatory molecules implicated in the signaling cascade triggered by tumor necrosis factor (TNF)alpha, although the events through which TNFalpha induces ROS generation are not well characterized. Here, we report that TNFalpha-induced ROS production was

Transglutaminase participates in UVB-induced cell death pathways in human corneal epithelial cells.

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OBJECTIVE Ultraviolet light (UVB) is known to cause apoptosis in human corneal epithelial cells. This study evaluates the role of transglutaminase in regulating tumor necrosis factor (TNF) receptor clustering as well as caspase activation in UVB-induced apoptosis in human corneal epithelial

Does autophagy in the midgut epithelium of centipedes depend on the day/night cycle?

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The midgut epithelium of two centipedes, Lithobius forficatus and Scolopendra cingulata, is composed of digestive, secretory and regenerative cells. In L. forficatus, the autophagy occurred only in the cytoplasm of the digestive cells as a sporadic process, while in S. cingulata, it occurred

Mechanisms of Antimicrobial and Anti-Endotoxin Activities of a Triazine-Based Amphipathic Polymer

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TZP4 is a triazine-based amphipathic polymer designed to mimic the amphipathic structure found in antimicrobial peptides. TZP4 showed potent antimicrobial activity comparable to melittin against antibiotic-resistant bacteria, such as methicillin-resistant Staphylococcus aureus and

Programmed cell death of Mycobacterium avium serovar 4-infected human macrophages prevents the mycobacteria from spreading and induces mycobacterial growth inhibition by freshly added, uninfected macrophages.

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Mycobacterium avium, an opportunistic pathogen in AIDS patients, replicates in human macrophages (Mphi) and induces programmed cell death (PCD). In this study we examine the effect of freshly added, uninfected Mphi on M. avium growth in apoptotic Mphi cultures. Incubation of uninfected autologous

Regulated expression of tissue transglutaminase in Swiss 3T3 fibroblasts: effects on the processing of fibronectin, cell attachment, and cell death.

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Tissue transglutaminase (tTgase) catalyzes the posttranslational modification of proteins by forming Ca2(+)-dependent intermolecular epsilon (gamma-glutamyl) lysine crosslinks; however, its physiological function is unclear despite increasing evidence for its involvement in the extracellular

The Colonic Microbiome and Epithelial Transcriptome Are Altered in Rats Fed a High-Protein Diet Compared with a Normal-Protein Diet.

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BACKGROUND A high-protein diet (HPD) can produce hazardous compounds and reduce butyrate-producing bacteria in feces, which may be detrimental to gut health. However, information on whether HPD affects intestinal function is limited. OBJECTIVE The aim of this study was to determine the impact of an

One-pot synthesis of natural amine-modified biocompatible carbon quantum dots with antibacterial activity

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In the present study, the thermal decomposition of citric acid in the presence of biogenic amine was used to synthesize four different functionalized carbon quantum dots (CQDs), namely, histamine-(HCQDs), putrescine-(PCQDs), cadaverine-(CCQDs) and spermine-(SCQDs). The thermal decomposition of the

Low-protein diets supplemented with casein hydrolysate favor the microbiota and enhance the mucosal humoral immunity in the colon of pigs.

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High-protein diets can increase the colonic health risks. A moderate reduction of dietary crude-protein (CP) level can improve the colonic bacterial community and mucosal immunity of pigs. However, greatly reducing the dietary CP level, even supplemented with all amino acids (AAs),

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