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    The intestinal immune response could play an important role in obesity-related comorbidities. We aim to study the profile of duodenal cytokines and chemokines in patients with morbid obesity (MO), its relation with insulin resistance (IR) and the intake of metformin, and with the evolution of MO after sleeve gastrectomy (SG). Duodenal levels of 24 cytokines and 9 chemokines were analyzed in 14 nonobese and in 54 MO who underwent SG: with lower IR (MO-lower-IR), with higher IR (MO-higher-IR), and with type 2 diabetes treated with metformin (MO-metf-T2DM). MO-lower-IR had higher levels of cytokines related to Th1, Th2, Th9, Th17, Th22, M1 macrophages, and chemokines involved in the recruitment of macrophages and T-lymphocytes (p < 0.05), and total (CD68 expression) and M1 macrophages (ITGAX expression) (p < 0.05) when compared with nonobese patients, but with a decrease in M2 macrophages (MRC1 expression) (p < 0.05). In MO-higher-IR, these chemokines and cytokines decreased and were similar to those found in nonobese patients. In MO-metf-T2DM, only IL-4 (Th2) and IL-22 (Th22) increased their levels with regard to MO-higher-IR (p < 0.05). In MO-higher-IR and MO-metf-T2DM, there was a decrease of CD68 expression (p < 0.05) while ITGAX and MRC1 were similar with regard to MO-lower-IR. We found an association between CXCL8, TNFβ and IL-2 with the evolution of body mass index (BMI) after SG (p < 0.05). There is an association between a higher IR and a lower duodenal immune response in MO, with a slight increase in those patients with metformin treatment. Intestinal immune response could be involved in the evolution of BMI after SG.

    Citation

    Ailec Ho-Plagaro, Concepción Santiago-Fernandez, Sara García-Serrano, Cristina Rodriguez, Lourdes Garrido-Sanchez, Alejandro Escamilla, Montserrat Gonzalo, Custodia Montiel-Casado, Guillermo Alcaín-Martínez, Beatriz Garcia-Muñoz, Natalia Ruiz-Santana, Luis Vázquez-Pedreño, Eduardo Garcia-Fuentes. A lower duodenal immune response is associated with an increase of insulin resistance in patients with morbid obesity. International journal of obesity (2005). 2020 Feb;44(2):340-352

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    PMID: 31554917

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