2010
DOI: 10.1002/ibd.21052
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Mycobacterium avium subsp. Paratuberculosis (MAP) as a modifying factor in Crohnʼs disease

Abstract: Increased proliferation of T cells and an altered cytokine response suggest that prior exposure to MAP and engagement of the immune system is common in patients with CD. This does not imply causation but does support further examination of this bacterium as an environmental modifying factor.

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Cited by 43 publications
(26 citation statements)
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“…1 We note with great interest ''Mycobacterium avium subsp. paratuberculosis (MAP) as a Modifying Factor in Crohn's Disease'' by Sibartie et al 2 The authors examined the influence of MAP on T-cell proliferation and cytokine response in patients with inflammatory bowel disease (IBD). As a result, coincubation of peripheral blood mononuclear cells (PBMCs) with MAP induced significantly more T-cell proliferation in PBMCs isolated from CD patients compared to those with ulcerative colitis (UC) or healthy volunteers.…”
Section: Involvement Ofmentioning
confidence: 99%
“…1 We note with great interest ''Mycobacterium avium subsp. paratuberculosis (MAP) as a Modifying Factor in Crohn's Disease'' by Sibartie et al 2 The authors examined the influence of MAP on T-cell proliferation and cytokine response in patients with inflammatory bowel disease (IBD). As a result, coincubation of peripheral blood mononuclear cells (PBMCs) with MAP induced significantly more T-cell proliferation in PBMCs isolated from CD patients compared to those with ulcerative colitis (UC) or healthy volunteers.…”
Section: Involvement Ofmentioning
confidence: 99%
“…3. Pese a que varios agentes biológicos podrían estar involucrados en la etiología de EC, MAP se distingue por la generación de una enfermedad crónica mediante la inducción y mantención de una infl amación basada en la respuesta inmune celular, en un rango de distintos tipos histológicos y en diferentes hospederos, incluyendo a los primates 25,27,29 .…”
Section: La Asociación Map-ecunclassified
“…Sumado a lo anterior, las células linfoides de pacientes con EC secretan citoquinas de respuesta tanto celular como humoral frente a la estimulación con MAP, lo que sugiere un papel modifi cador más que causal de la bacteria. De esta manera, MAP promovería una activación inespecífi ca de la respuesta inmune que puede afectar las terapias con anticuerpos anti-TNF utilizadas en pacientes con EC pero que no son concluyentes respecto de la asociación entre este agente y la enfermedad en las personas 29 . Además, el uso de antibióticos con acción sobre MAP ha resultado controversial, siendo exitoso sólo en algunos casos 35,36 .…”
Section: La Asociación Map-ecunclassified
“…It is also difficult to reconcile the concept of the role of MAP in CD with the beneficial effects of host immunosuppression, and lack of good clinical effectiveness of antibiotics acting against MAP in patients with CD. MAP could however be a cofactor for inflammation [22]. A virulent adherent-invasive E. coli pathovar that has been isolated from the ileal mucosa of patients with CD [23] can invade epithelial cells and replicate in the host cell cytoplasm [23,24].…”
Section: Bacteria and Inflammatory Bowel Diseasementioning
confidence: 99%