Morusin is a prenylated flavonoid isolated from the root bark of Morus alba. Many studies have shown the ability of flavonoids to act as anti-inflammatory agents. The aim of this study was to evaluate the effect of morusin on experimentally colitis induced by 2,4,6-trinitrobenzensulfonic acid in Wistar rats and to compare it with sulfasalazine, a drug conventionally used in the treatment of inflammatory bowel disease. Morusin was administered by gavage at doses of 12.5, 25, or 50 mg/kg/day for five days. The colonic tissue was evaluated macroscopically, histologically, and by performing immunodetection and zymographic analysis to determine the levels of antioxidant enzymes [superoxide dismutase (SOD) and catalase (CAT)], interleukin (IL)-1β, and transforming growth factor (TGF)-β1 and the activities of matrix metalloproteinases (MMP) 2 and 9. The tissue damage scores were significantly reduced with increasing dose of morusin, however efficacy was not demonstrated at the highest dose. At the dose of 12.5 mg/kg, morusin exerted therapeutic effectivity similar to that of sulfasalazine (50 mg/kg). This was associated with significant reduction of TGF-β1 levels and MMP2 and MMP9 activities, and slight reduction of IL-1β. Our results suggest that morusin possesses therapeutic potential for the treatment of chronic inflammatory diseases.
- MeSH
- flavonoidy farmakologie MeSH
- kolitida chemicky indukované enzymologie prevence a kontrola MeSH
- kolon účinky léků enzymologie patologie MeSH
- kyselina trinitrobenzensulfonová MeSH
- matrixová metaloproteinasa 2 metabolismus MeSH
- potkani Wistar MeSH
- prenylace MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Inflammatory bowel disease including ulcerative colitis are complex multifactorial diseases of unknown aetiology. Sulphate-reducing bacteria are often associated with the occurrence of the disease. The physiological properties of intestinal sulphate-reducing bacteria including kinetic characteristic of their growth have never been reported. The aim of this research was to evaluate the presence of sulphate-reducing bacteria isolated from the intestines of mice, study their growth, calculate and compare the kinetic growth properties on the model of dextran sulphate sodium induced ulcerative colitis in the mice. The number of viable intestinal sulphate-reducing bacteria from the bowel lumen of mice with ulcerative colitis was higher (P > 0.05) by 22% at 12 h of cultivation compared with cultures of sulphate-reducing bacteria from the bowel lumen of healthy mice. The sulphate-reducing bacteria from mice with colitis also had a slightly higher generation time (14.29 h) and exponential growth phase (22.24 h) compared with cultures from healthy mice. The time of lag-phase was 2 × shorter (P > 0.01) in the cultures of sulphate-reducing bacteria from mice with ulcerative colitis. The described research is new and important for the prediction of the sulphate-reducing bacteria number in the gut and their rate of dissimilatory sulphate reduction. The kinetic characteristic of their growth is important for further clarification of the mechanisms of sulphate reduction and accumulation of hydrogen sulphide, which is toxic for epithelial cells of the intestine and can cause bowel diseases both in humans and animals, in particular ulcerative colitis.
- MeSH
- mikrobiota MeSH
- myši MeSH
- střevní mikroflóra MeSH
- sulfan * metabolismus škodlivé účinky MeSH
- ulcerózní kolitida MeSH
- Check Tag
- myši MeSH
- Publikační typ
- práce podpořená grantem MeSH
Diplacone (1) and mimulone (2), two geranylated flavanones, have previously shown anti-inflammatory and antiradical activity in vitro. The present study aimed to evaluate their activity in vivo on a model of colitis induced in Wistar rats by an oral administration of dextran sulfate sodium (DSS). Diplacone (1) and mimulone (2) were administered at a bolus dose of 25mg/kg by gastric gavage 48 and 24h prior to the induction of colitis by DSS and every 24h on the following days of the experiment. The effect of the treatment was assessed by monitoring the disease activity index (DAI), histopathological examination, evaluation of the weight and length of the colon and by analysis of the levels and activities of cyclooxygenase-2 (COX-2), matrix metalloproteinase-2 (MMP2), superoxide dismutase-2 (SOD2), and catalase (CAT) in the inflamed tissue. Administration of the test compounds prior and after induction of colitis ameliorated the symptoms of colitis (diarrhea, presence of the blood in the stool) and delayed their onset. The ability of compounds 1 and 2 to reduce the levels of COX-2 and to increase the ratio of pro-MMP2/MMP2 activity correlates with the values of the DAI. The lowering of the levels of the antioxidant enzymes SOD2 and CAT reflects the ability of the test compounds to scavenge reactive oxygen species.
- MeSH
- cyklooxygenasa 2 metabolismus MeSH
- flavanony farmakologie MeSH
- katalasa metabolismus MeSH
- kolitida chemicky indukované farmakoterapie MeSH
- kolon účinky léků patofyziologie MeSH
- matrixová metaloproteinasa 2 metabolismus MeSH
- modely nemocí na zvířatech MeSH
- molekulární struktura MeSH
- potkani Wistar MeSH
- síran dextranu škodlivé účinky MeSH
- superoxiddismutasa metabolismus MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Léčivé rostliny slouží již několik tisíc let jako prostředky v léčbě různých onemocnění. Přestože se jejich obliba v průběhu historie měnila, zájem o rostliny a jejich obsahové látky dnes opět vzrůstá. Výzkum se nyní zaměřuje na určení obsahových látek zodpovědných za účinek a na objasnění jejich mechanizmu působení. Rostliny mají své místo i v doplňkové terapii chronických zánětlivých onemocnění. Chronické střevní záněty, jako jsou Crohnova choroba a ulcerózní kolitida, jsou chronická onemocnění gastrointestinálního traktu. Jejich incidence v posledních letech neustále narůstá a onemocnění má těžko předvídatelný průběh. Vzhledem k nejasné etiologii střevních zánětů není dosavadní terapie zcela úspěšná. Z důvodů častých nežádoucích účinků a nedostatečného efektu standardní léčby je použití komplementární a alternativní medicíny u pacientů velmi rozšířené. Rostlinné produkty tak mohou nemocným poskytnout alternativní nebo doplňkovou možnost léčby. Toto review přináší přehled rostlin a případně jejich obsahových látek používaných v doplňkové terapii chronických střevních zánětů s ohledem na jejich hodnocení v klinických studiích.
Medicinal plants have been used to treat various diseases for thousands of years. Although their popularity has changed in the course of history, the interest in plants and in their active compounds is currently increasing. Today's research focuses on determining the active substances responsible for the effect and their mechanism of action. Plants have also their place in complementary therapy of chronic inflammatory diseases. Inflammatory bowel disease (IBD), such as Crohn's disease and ulcerative colitis, are chronic diseases of the gastrointestinal tract. Their incidence has been increasing in recent years and it is difficult to predict the progression of the disease. Due to the unclear aetiology of inflammatory bowel disease, current therapy is not completely successful. Complementary and alternative medicine is widely used by patients because of frequent side effects and lack of effectiveness of the standard therapy. Plant products may provide an alternative or supplementary treatment option to patients. This review brings a survey of plants and their content compounds used in complementary therapy of inflammatory bowel disease with special relevance to clinical studies. Key words: experimental animal models – phytotherapy – inflammatory bowel disease – clinical trials The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE „uniform requirements“ for biomedical papers. Submitted: 5. 2. 2014 Accepted: 31. 3. 2014
- MeSH
- Aloe MeSH
- Angelica sinensis MeSH
- Boswellia MeSH
- Crohnova nemoc * farmakoterapie imunologie MeSH
- dvojitá slepá metoda MeSH
- fytoterapie * využití MeSH
- idiopatické střevní záněty farmakoterapie imunologie MeSH
- indukce remise MeSH
- ječmen (rod) MeSH
- klinické zkoušky jako téma MeSH
- kurkumin MeSH
- léčivé rostliny * chemie imunologie klasifikace MeSH
- lidé MeSH
- mesalamin MeSH
- modely nemocí na zvířatech MeSH
- Pistacia MeSH
- placeba MeSH
- pšenice MeSH
- randomizované kontrolované studie jako téma MeSH
- rostlinné pryskyřice MeSH
- sulfasalazin MeSH
- Tripterygium MeSH
- ulcerózní kolitida * farmakoterapie imunologie MeSH
- Vaccinium myrtillus MeSH
- výsledek terapie MeSH
- výzkum MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
