In vitro and in vivo inhibitory activity of 6-amino-2,4,5-trimethylpyridin-3-ols against inflammatory bowel disease

2016 ◽  
Vol 26 (19) ◽  
pp. 4587-4591 ◽  
Author(s):  
Suhrid Banskota ◽  
Han-eol Kang ◽  
Dong-Guk Kim ◽  
Sang Won Park ◽  
Hyeonjin Jang ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Inhibitory Activity ◽  
Inflammatory Bowel

scholarly journals Deficiency in the anti-apoptotic protein DJ-1 promotes intestinal epithelial cell apoptosis and aggravates inflammatory bowel disease via p53

2020 ◽  
Vol 295 (13) ◽  
pp. 4237-4251 ◽  
Author(s):  
Jie Zhang ◽  
Min Xu ◽  
Weihua Zhou ◽  
Dejian Li ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Epithelial Cell ◽  
Bowel Disease ◽  
Intestinal Epithelial Cell ◽  
Intestinal Inflammation ◽  
Intestinal Epithelial ◽  
P53 Expression ◽  
Inflammatory Bowel

Parkinson disease autosomal recessive, early onset 7 (PARK7 or DJ-1) is involved in multiple physiological processes and exerts anti-apoptotic effects on multiple cell types. Increased intestinal epithelial cell (IEC) apoptosis and excessive activation of the p53 signaling pathway is a hallmark of inflammatory bowel disease (IBD), which includes ulcerative colitis (UC) and Crohn's disease (CD). However, whether DJ-1 plays a role in colitis is unclear. To determine whether DJ-1 deficiency is involved in the p53 activation that results in IEC apoptosis in colitis, here we performed immunostaining, real-time PCR, and immunoblotting analyses to assess DJ-1 expression in human UC and CD samples. In the inflamed intestines of individuals with IBD, DJ-1 expression was decreased and negatively correlated with p53 expression. DJ-1 deficiency significantly aggravated colitis, evidenced by increased intestinal inflammation and exacerbated IEC apoptosis. Moreover, DJ-1 directly interacted with p53, and reduced DJ-1 levels increased p53 levels both in vivo and in vitro and were associated with decreased p53 degradation via the lysosomal pathway. We also induced experimental colitis with dextran sulfate sodium in mice and found that compared with DJ-1−/− mice, DJ-1−/−p53−/− mice have reduced apoptosis and inflammation and increased epithelial barrier integrity. Furthermore, pharmacological inhibition of p53 relieved inflammation in the DJ-1−/− mice. In conclusion, reduced DJ-1 expression promotes inflammation and IEC apoptosis via p53 in colitis, suggesting that the modulation of DJ-1 expression may be a potential therapeutic strategy for managing colitis.

scholarly journals Inflammatory Bowel Disease–associated GP2 Autoantibodies Inhibit Mucosal Immune Response to Adherent-invasive Bacteria

2020 ◽  
Vol 26 (12) ◽  
pp. 1856-1868
Author(s):  
Stefanie Derer ◽  
Ann-Kathrin Brethack ◽  
Carlotta Pietsch ◽  
Sebastian T Jendrek ◽  
Thomas Nitzsche ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Intestinal Inflammation ◽  
Ex Vivo ◽  
Expression Patterns ◽  
Mucosal Immune Response ◽  
Disease Manifestation ◽  
Inflammatory Bowel

Abstract Adherent-invasive Escherichia coli have been suggested to play a pivotal role within the pathophysiology of inflammatory bowel disease (IBD). Autoantibodies against distinct splicing variants of glycoprotein 2 (GP2), an intestinal receptor of the bacterial adhesin FimH, frequently occur in IBD patients. Hence, we aimed to functionally characterize GP2-directed autoantibodies as a putative part of IBD’s pathophysiology. Ex vivo, GP2-splicing variant 4 (GP2#4) but not variant 2 was expressed on intestinal M or L cells with elevated expression patterns in IBD patients. The GP2#4 expression was induced in vitro by tumor necrosis factor (TNF)-α. The IBD-associated GP2 autoantibodies inhibited FimH binding to GP2#4 and were decreased in anti-TNFα-treated Crohn’s disease patients with ileocolonic disease manifestation. In vivo, mice immunized against GP2 before infection with adherent-invasive bacteria displayed exacerbated intestinal inflammation. In summary, autoimmunity against intestinal expressed GP2#4 results in enhanced attachment of flagellated bacteria to the intestinal epithelium and thereby may drive IBD’s pathophysiology.

Oxidative stress and thromboxane-dependent platelet activation in inflammatory bowel disease: effects of anti-TNF-α treatment

2016 ◽  
Vol 116 (09) ◽  
pp. 486-495 ◽  
Author(s):  
Marco Guerci ◽  
Paola Simeone ◽  
Sandro Ardizzone ◽  
Alessandro Massari ◽  
Paolo Giuffrida ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Platelet Activation ◽  
Bowel Disease ◽  
Infliximab Treatment ◽  
Soluble Cd40 Ligand ◽  
Tnf Α ◽  
Inflammatory Bowel ◽  
Vitro Effect

SummaryPatients with inflammatory bowel disease (IBD) are at higher risk of venous thromboembolism and coronary artery disease despite having a lower burden of traditional risk factors. Platelets from IBD patients release more soluble CD40 ligand (CD40L), and this has been implicated in IBD platelet hyper-activation. We here measured the urinary F2-isoprostane 8-iso-prostaglandin (PG)2α (8-iso-PGF2α), urinary 11–dehydro–thromboxane (TX) B2 (11-dehydro–TXB2) and plasma CD40L in IBD patients, and explored the in vitro action of anti-tumour necrosis factor (TNF)–α antibody infliximab on IBD differentiating megakaryocytes. Urinary and blood samples were collected from 124 IBD patients and 37 healthy subjects. Thirteen IBD patients were also evaluated before and after 6–week infliximab treatment. The in vitro effect of infliximab on patient-derived megakaryocytes was evaluated by immunoflorescence microscopy and by flow cytometry. IBD patients had significantly (p<0.0001) higher urinary 8–iso–PGF2α and 11–dehydro–TXB2 as well as plasma CD40L levels than controls, with active IBD patients displaying higher urinary and plasma values when compared to inactive patients in remission. A 6-week treatment with infliximab was associated with a significant reduction of the urinary excretion of 8–iso–PGF2α and 11–dehydro–TXB2 (p=0.008) and plasma CD40L (p=0.001). Infliximab induced significantly rescued pro-platelet formation by megakaryocytes derived from IBD patients but not from healthy controls. Our findings provide evidence for enhanced in vivo TX–dependent platelet activation and lipid peroxidation in IBD patients. Anti-TNF–α therapy with infliximab down-regulates in vivo isoprostane generation and TX biosynthesis in responder IBD patients. Further studies are needed to clarify the implication of infliximab induced-proplatelet formation from IBD megakaryocytes.Supplementary Material to this article is available online at www.thrombosis-online.com.

Ultrasonographic evaluation of the bowel wall in inflammatory bowel disease: Comparison of in vivo and in vitro studies

1994 ◽  
Vol 19 (5) ◽  
pp. 395-399 ◽  
Author(s):  
J. Hata ◽  
K. Haruma ◽  
H. Yamanaka ◽  
J. Fujimura ◽  
M. Yoshihara ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Bowel Wall ◽  
In Vitro Studies ◽  
Inflammatory Bowel

Coated chitosan pellets containing rutin intended for the treatment of inflammatory bowel disease: In vitro characteristics and in vivo evaluation

2012 ◽  
Vol 422 (1-2) ◽  
pp. 151-159 ◽  
Author(s):  
Miloslava Rabišková ◽  
Tereza Bautzová ◽  
Jan Gajdziok ◽  
Kateřina Dvořáčková ◽  
Alf Lamprecht ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
In Vivo Evaluation ◽  
Inflammatory Bowel

scholarly journals Correction: Novel Synthetic Oxazines Target NF-κB in Colon Cancer In Vitro and Inflammatory Bowel Disease In Vivo

PLoS ONE ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. e0175659
Author(s):  
Anilkumar C. Nirvanappa ◽  
Chakrabhavi Dhananjaya Mohan ◽  
Shobith Rangappa ◽  
Hanumappa Ananda ◽  
Alexey Yu Sukhorukov ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Colon Cancer ◽  
Bowel Disease ◽  
Inflammatory Bowel
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