Protective effect of Bifidobacterium pseudocatenulatum CECT7765 against induced bacterial antigen translocation in experimental cirrhosis. (24th November 2013)

• Record Type: Journal Article
• Authors: Moratalla, Alba; Gómez‐Hurtado, Isabel; Santacruz, Arlette; Moya, Ángela; Peiró, Gloria; Zapater, Pedro; González‐Navajas, José M.; Giménez, Paula; Such, José; Sanz, Yolanda; Francés, Rubén
• Is Part Of: Liver international. Volume 34:Number 6(2014:Aug.)
• Page Start: 850
• Page End: 858
• Publication Date: 2013-11-24
• Subjects: Liver -- Periodicals; Liver -- Diseases -- Periodicals; 616.362
• DOI: 10.1111/liv.12380
• Languages: English
• ISSNs: 1478-3223

Abstract

<abstract abstract-type="main" id="liv12380-abs-0001"> <title>Abstract</title> <sec id="liv12380-sec-0001" sec-type="section"> <title>Background & Aims</title> <p>Intervention in the gut ecosystem is considered as a potential strategy to treat liver diseases and their complications. We have evaluated the effects of <italic>Bifidobacterium pseudocatenulatum </italic>CECT7765 on bacterial translocation and the liver status in experimental cirrhosis.</p> </sec> <sec id="liv12380-sec-0002" sec-type="section"> <title>Animals & Methods</title> <p>Liver damage was induced in Balb/c mice by weight‐controlled oral administration of carbon tetrachloride. Laparotomies were performed at week 12. One week prior to laparotomy, animals received <italic>B. pseudocatenulatum </italic>CECT7765 (10<sup>9</sup>cfu/daily) or placebo intragastrically. All animals received <italic>Escherichia coli</italic> (10<sup>7</sup>cfu/single dose) intragastrically 24 hours before laparotomy. A group of naïve non‐treated animals was included as control. Liver tissue specimens, mesenteric lymph nodes, intestinal content and blood were collected. Liver histology, profibrogenic genes expression, bacterial DNA translocation, serum endotoxaemia and liver cytokine levels were measured.</p> </sec> <sec id="liv12380-sec-0003" sec-type="section"> <title>Results</title> <p> <italic>Bifidobacterium pseudocatenulatum </italic>CECT7765 showed no significant effect on structural liver damage, as determined by histological evaluation, alpha‐smooth muscle actin distribution, profibrogenic gene expression levels, total hydroxyproline levels and malon dialdehyde production compared with mice receiving placebo. Interestingly, bacterial DNA translocation and serum endotoxin levels were significantly decreased in mice receiving the <italic>Bifidobacterium</italic> strain compared with placebo. Gut barrier integrity markers were up‐regulated in mice receiving <italic>B. pseudocatenulatum </italic>CECT7765 and quantitatively correlated with intestinal gene copy numbers of the bifidobacterial strain. Gene expression levels of several anti‐inflammatory mediators were also increased in mice receiving <italic>B. pseudocatenulatum </italic>CECT7765 compared with placebo.</p> </sec> <sec id="liv12380-sec-0004" sec-type="section"> <title>Conclusion</title> <p>Oral administration of <italic>B. pseudocatenulatum </italic>CECT7765 is associated with improved gut barrier integrity and shows a beneficial effect against induced bacterial antigen translocation in the CCl<sub>4</sub>‐model of cirrhosis.</p> </sec> </abstract>