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  • 1.
    Björkqvist, Olle
    et al.
    Örebro University, School of Medical Sciences.
    Repsilber, Dirk
    Örebro University, School of Medical Sciences.
    Seifert, M.
    Microbiol Tumor & Cell Biol, Karolinska Inst, Stockholm, Sweden.
    Engstrand, L.
    Microbiol Tumor & Cell Biol, Karolinska Inst, Stockholm, Sweden.
    Rangel, Ignacio
    Örebro University, School of Medical Sciences.
    Halfvarson, Jonas
    Örebro University, School of Medical Sciences.
    Increasing abundance of faecalibacterium prausnitzii is associated with decreased intestinal inflammation in Crohn's disease: A longitudinal study2018In: Journal of Crohn's & Colitis, ISSN 1873-9946, E-ISSN 1876-4479, Vol. 12, no Suppl. 1, p. S468-S469Article in journal (Other academic)
  • 2.
    Björkqvist, Olle
    et al.
    Örebro University, School of Medical Sciences.
    Repsilber, Dirk
    Orebro Univ, Sch Med Sci, Orebro, Sweden..
    Seifert, Maike
    Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
    Brislawn, Colin
    Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland WA, USA.
    Jansson, Janet
    Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland WA, USA.
    Engstrand, Lars
    Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
    Rangel, Ignacio
    Örebro University, School of Medical Sciences.
    Halfvarson, Jonas
    Örebro University, School of Medical Sciences. Department of Gastroenterology.
    Alterations in the relative abundance of Faecalibacterium prausnitzii correlate with changes in fecal calprotectin in patients with ileal Crohn's disease: a longitudinal study2019In: Scandinavian Journal of Gastroenterology, ISSN 0036-5521, E-ISSN 1502-7708, Vol. 54, no 4, p. 577-585Article in journal (Refereed)
    Abstract [en]

    Objectives: Crohn's disease is characterized by a gut dysbiosis with decreased abundance of butyrate producers such as Faecalibacterium prausnitzii. Although F. prausnitzii secretes anti-inflammatory molecules, few studies have addressed the importance of F. prausnitzii in a longitudinal setting. We aimed to examine the relationship between temporal profiles of F. prausnitzii, the C. leptum group, overall butyrate production, and inflammatory activity.

    Material and methods: Fecal samples (n = 59) were collected every third month from nine patients with ileal Crohn's disease. The abundance of F. prausnitzii and C. leptum was quantified relative to the total amount of bacteria using quantitative-PCR. To assess butyrate production of gut microbiota, gene copy numbers of the butyryl-CoA:acetate-CoA transferase (BCoAT) gene were quantified by qPCR. The inflammatory activity was defined by fecal (f)-calprotectin.

    Results: No correlation between the relative abundance of F. prausnitzii, the C. leptum group, or copy numbers of the BCoAT gene, and f-calprotectin was observed in the total sample set. By analyzing alterations between consecutive samples, a negative correlation between changes in the relative abundance of F. prausnitzii and f-calprotectin was observed (R = -0.39; p = .009). Changes in C. leptum (R = -0.18, p = .23) and number of copies of the BCoAT gene (R = -0.12; p = .42) did not correlate with f-calprotectin.

    Conclusions: There was an inverse correlation between temporal changes in the relative abundance of F. prausnitzii, but not overall butyrate producing capacity, and changes in inflammatory activity in ileal Crohn's disease. These findings indicate that F. prausnitzii may play a role in gut homeostasis, even though causality is still to be demonstrated.

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