scholarly journals 2,4,6-trinitrobenzenesulfonic acid-induced colitis in Rattus norgevicus: a categorization proposal

2021 ◽  
Author(s):  
Mariana FERREIRA-DUARTE ◽  
Tiago RODRIGUES-PINTO ◽  
Daniela MENEZES-PINTO ◽  
Marisa ESTEVES-MONTEIRO ◽  
Salomé GONÇALVES-MONTEIRO ◽  
...  
Keyword(s):  
Trinitrobenzenesulfonic Acid

Impact of titanium dioxide nanoparticles on intestinal community in the 2,4,6-Trinitrobenzenesulfonic acid (TNBS)-induced acute colitis mice and the intervention effect of vitamin E

Nanoscale ◽  
2020 ◽  
Author(s):  
Yanjun Gao ◽  
Tingyu Li ◽  
Shuming Duan ◽  
Lizhi Lv ◽  
Yuan Li ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Vitamin E ◽  
Titanium Dioxide Nanoparticles ◽  
Trinitrobenzenesulfonic Acid ◽  
Acute Colitis ◽  
Intervention Effect ◽  
Tio2 Nps

Titanium dioxide nanoparticles (TiO2-NPs) is widely applicated as additives in foods for its excellent whitening and brightening capability. Although the toxicity and antibacterial activity of TiO2-NPs has been extensively studied,...

scholarly journals Patchouli oil ameliorates acute colitis: A targeted metabolite analysis of 2,4,6-trinitrobenzenesulfonic acid-induced rats

2017 ◽  
Vol 14 (2) ◽  
pp. 1184-1192 ◽  
Author(s):  
Xiuting Yu ◽  
Guanghua Yang ◽  
Hua Jiang ◽  
Shuhai Lin ◽  
Yuhong Liu ◽  
...  
Keyword(s):  
Metabolite Analysis ◽  
Trinitrobenzenesulfonic Acid ◽  
Acute Colitis

scholarly journals Fecal Lipocalin-2 as a Sensitive and Noninvasive Biomarker in the TNBS Crohn’s Inflammatory Bowel Disease Model

2016 ◽  
Vol 44 (8) ◽  
pp. 1084-1094 ◽  
Author(s):  
Heidi Hsieh ◽  
Jeffrey Morin ◽  
Cyndi Filliettaz ◽  
Rao Varada ◽  
Shelby LaBarre ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Body Weight ◽  
Bowel Disease ◽  
Saline Water ◽  
Disease Model ◽  
Recovery Phase ◽  
Lipocalin 2 ◽  
Trinitrobenzenesulfonic Acid ◽  
Noninvasive Biomarker ◽  
Inflammatory Bowel

Colitis induced by 2,4,6-Trinitrobenzenesulfonic acid (TNBS) has been used as a model for Crohn’s disease (CD) of inflammatory bowel disease (IBD). Lipocalin-2 (Lcn-2) is an emerging and clinically relevant biomarker of IBD. We investigated the performance of serum and fecal Lcn-2 in the TNBS model of colitis. Female, 7-week-old, BALB/c mice were administered intrarectally phosphate-buffered saline/water or 30% ethanol (vehicle control groups) for 5 days or TNBS for 5 days followed by a 28-day recovery phase. Serum and fecal levels of Lcn-2 were quantified, and effects on body weight, clinical scores, colon weight and length, gross pathology, and histopathology were investigated. Increased serum Lcn-2 levels correlated only with marked to severe inflammation. A clear differentiation in Lcn-2 fecal levels between TNBS-treated and vehicle-treated control mice was most noticeable on days 2 and 3. There was a strong correlation between body weight change, histopathologic scores of inflammation, and/or fecal Lcn-2 levels on days 2 and 5. Both serum and fecal Lcn-2 levels declined over time as the colonic mucosa recovered. Fecal Lcn-2 was found to be a more sensitive biomarker (vs. serum Lcn-2) and was able to discriminate mild, moderate, and severe colonic inflammation.

Vitamin D/VDR signaling inhibits colitis by suppressing HIF-1α activation in colonic epithelial cells

2021 ◽  
Author(s):  
Gang Xue ◽  
Ruifang Gao ◽  
Zhuanzhuan Liu ◽  
Na Xu ◽  
Yong Cao ◽  
...  
Keyword(s):  
Vitamin D ◽  
Animal Models ◽  
Epithelial Cells ◽  
Dextran Sulfate ◽  
Hypoxia Inducible Factor ◽  
Dependent Manner ◽  
Trinitrobenzenesulfonic Acid ◽  
Colonic Epithelial Cells ◽  
Bowel Diseases ◽  
Inflammatory Bowel

Vitamin D/vitamin D receptor (VDR) signaling is reported to have a protective effect on the onset or progression of inflammatory bowel diseases (IBD) and hypoxia-inducible factor 1α (HIF-1α) activation is demonstrated to be closely associated with chemical-induced colitis. However, the association between vitamin D/VDR signaling and HIF-1α on IBD development remains a mystery. Here, we showed that HIF-1α expression was largely increased in the colonic epithelial cells of diseased tissues from ulcerative colitis (UC) patients. Consistently, HIF-1α activation was also improved in colonic epithelial cells upon TNFα treatment in a NF-κB pathway-dependent manner. HIF-1α inhibitors treatments ameliorated 2,4,6-trinitrobenzenesulfonic acid (TNBS)- or dextran sulfate sodium (DSS)-induced colitis in animal models. In cell or colitis animal models, vitamin D/VDR signaling suppressed HIF-1α overexpression in colonic epithelial cells via regulating NF-κB pathway, resulting in the inhibition of IFNγ and IL-1β overproductions in these cells. Collectively, these data suggest that vitamin D/VDR signaling relieves colitis development in animal models, at least in part, by suppressing HIF-1α expression in colonic epithelial cells.

scholarly journals Novel Bifunctional Inhibitor of Xylanase and Aspartic Protease: Implications for Inhibition of Fungal Growth

2001 ◽  
Vol 45 (7) ◽  
pp. 2008-2017 ◽  
Author(s):  
Chandravanu Dash ◽  
Absar Ahmad ◽  
Devyani Nath ◽  
Mala Rao
Keyword(s):  
Growth Inhibition ◽  
Fungal Growth ◽  
Phytopathogenic Fungi ◽  
Aspartic Protease ◽  
Cellular Growth ◽  
Alternative Mechanism ◽  
Trinitrobenzenesulfonic Acid ◽  
Woodward’S Reagent K ◽  
Bifunctional Inhibitor ◽  
Fungal Growth Inhibition

ABSTRACT A novel bifunctional inhibitor (ATBI) from an extremophilicBacillus sp. exhibiting an activity against phytopathogenic fungi, including Alternaria, Aspergillus, Curvularia, Colletotricum, Fusarium, and Phomopsis species, and the saprophytic fungus Trichoderma sp. has been investigated. The 50% inhibitory concentrations of ATBI ranged from 0.30 to 5.9 μg/ml, whereas the MIC varied from 0.60 to 3.5 μg/ml for the fungal growth inhibition. The negative charge and the absence of periodic secondary structure in ATBI suggested an alternative mechanism for fungal growth inhibition. Rescue of fungal growth inhibition by the hydrolytic products of xylanase and aspartic protease indicated the involvement of these enzymes in cellular growth. The chemical modification of Asp or Glu or Lys residues of ATBI by 2,4,6-trinitrobenzenesulfonic acid and Woodward's reagent K, respectively, abolished its antifungal activity. In addition, ATBI also inhibited xylanase and aspartic protease competitively, withKi values 1.75 and 3.25 μM, respectively. Our discovery led us to envisage a paradigm shift in the concept of fungal growth inhibition for the role of antixylanolytic activity. Here we report for the first time a novel class of antifungal peptide, exhibiting bifunctional inhibitory activity.

Lactobacillus acidophilus and Clostridium butyricum ameliorate colitis in murine by strengthening the gut barrier function and decreasing inflammatory factors

2018 ◽  
Vol 9 (5) ◽  
pp. 775-787 ◽  
Author(s):  
Y. Wang ◽  
Y. Gu ◽  
K. Fang ◽  
K. Mao ◽  
J. Dou ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Lactobacillus Acidophilus ◽  
Barrier Function ◽  
Clostridium Butyricum ◽  
In Vivo Studies ◽  
Inflammatory Factors ◽  
Sprague Dawley ◽  
Trinitrobenzenesulfonic Acid ◽  
Gut Barrier Function ◽  
Anti Inflammatory

Ulcerative colitis is a type of chronic inflammation present in the intestines for which the aetiology is not yet clear. The current therapies for ulcerative colitis cannot be considered to be long-term management strategies due to their significant side effects. Therefore, it is essential to identify an alternative therapeutic strategy for ulcerative colitis. The present study focused on the evaluation of the anti-inflammatory activities of Lactobacillus acidophilus CGMCC 7282 and Clostridium butyricum CGMCC 7281. The roles of both single and combination of L. acidophilus CGMCC 7282 and C. butyricum CGMCC 7281 in ulcerative colitis were investigated in 2,4,6-trinitrobenzenesulfonic acid-induced acute colitis (Th1-type colitis) in Sprague-Dawley rats and oxazolone-induced chronic colitis (Th2-type colitis) in BALB/c mice. The in vivo studies showed that the administration of L. acidophilus CGMCC 7282, C. butyricum CGMCC 7281 and L. acidophilus CGMCC 7282 plus C. butyricum CGMCC 7281 could reduce the Th1-type colitis as well as the Th2-type colitis, and the combination of the two strains exhibited the most notable effects, as indicated by the reduced mortality rates, the suppressed disease activity indices, the improved body weights, the reduced colon weight/colon length and colon weight/body weight ratios, and the improved gross anatomic characteristics and histological features (ameliorations of neutrophil infiltration and ulceration in the colon). It was found that the alterations of the gut microbiome, the barrier function changing and the selected inflammation-related cytokines are observed in the ulcerative colitis rats/mice treated with L. acidophilus CGMCC 7282 and C. butyricum CGMCC 7281. The combination of L. acidophilus CGMCC 7282 plus C. butyricum CGMCC 7281 also exerted a stronger anti-inflammatory effect than either of the single strains alone in vitro. These findings provide evidence that the administration of L. acidophilus CGMCC 7282 plus C. butyricum CGMCC 7281 may be a promising therapy for ulcerative colitis.

Perturbational actions of barbiturate analogues on erythrocyte and synaptosomal membranes

1985 ◽  
Vol 63 (8) ◽  
pp. 937-943 ◽  
Author(s):  
David V. Godin ◽  
Peter McGinn
Keyword(s):  
Membrane Proteins ◽  
Local Anaesthetics ◽  
Erythrocyte Membranes ◽  
Synaptosomal Membranes ◽  
Structural Components ◽  
Chemical Probes ◽  
Trinitrobenzenesulfonic Acid ◽  
Specific Chemical ◽  
Nitrobenzoic Acid ◽  
Acid Incorporation

The membrane perturbational actions of pentobarbital, methohexital, and phenobarbital were analyzed in terms of their effects on the incorporation of group-specific chemical probes into protein and phospholipid structural components and on the activity of various functionally distinct ATPases in erythrocyte and brain synaptosomal membranes. When compared at concentrations producing similar degrees of antihemolysis in red cells, the three analogues differed most markedly in the nature and degree of the structural and functional alterations induced in membrane proteins, with the most highly lipophilic agent, methohexital, being frequently, although not invariably, the most potent. Comparison of the effects of pentobarbital on characteristics of trinitrobenzenesulfonic acid and 5,5′-dithiobis-(2-nitrobenzoic acid) incorporation into erythrocyte membranes with results previously obtained using other anaesthetics at concentrations producing 50% antihemolysis showed that pentobarbital behaves similarly to neutral general anaesthetics but differently from cationic local anaesthetics. Our findings suggest that the membrane perturbational characteristics of barbiturates may contribute to their diverse and complex actions on excitable tissues.

Transplantation of a bacterial consortium ameliorates trinitrobenzenesulfonic acid-induced colitis and intestinal dysbiosis in rats

2016 ◽  
Vol 11 (7) ◽  
pp. 887-902 ◽  
Author(s):  
Ming Li ◽  
Zhenzhen Li ◽  
Shu Wen ◽  
Yinhui Liu ◽  
Ying Wang ◽  
...  
Keyword(s):  
Bacterial Consortium ◽  
Trinitrobenzenesulfonic Acid ◽  
Intestinal Dysbiosis
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