Abstract
This work analyzes the impact of two conditions, intermittent hypoxia exposure and high-fat diet in rats as models of sleep apnea. We studied the autonomic activity and histological structure of the rat jejunum and whether the overlapping of both conditions, as often observed in patients, induces more deleterious effects on the intestinal barrier. We found alterations in jejunum wall histology, predominantly in HF rats, based on increased crypt depth and submucosal thickness, as well as decreased muscularis propria thickness. These alterations were maintained with the IH and HF overlap. An increase in the number and size of goblet cells in the villi and crypts and the infiltration of eosinophils and lymphocytes in the lamina propria suggest an inflammatory status, confirmed by the increase in plasma CRP levels in all experimental groups. Regarding the CAs analysis, IH, alone or combined with HF, causes a preferential accumulation of NE in the catecholaminergic nerve fibers of the jejunum. In contrast, serotonin increases in all three experimental conditions, with the highest level in the HF group. It remains to be elucidated whether the alterations found in the present work could affect the permeability of the intestinal barrier, promoting sleep apnea-induced morbidities.
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We thank Mª de los Llanos Bravo and A. Gordillo for their technical assistance.
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Valverde-Pérez, E., Olea, E., Obeso, A., Prieto-Lloret, J., Rocher, A., Gonzalez-Obeso, E. (2023). Intermittent Hypoxia and Diet-Induced Obesity on the Intestinal Wall Morphology in a Murine Model of Sleep Apnea. In: Conde, S.V., Iturriaga, R., del Rio, R., Gauda, E., Monteiro, E.C. (eds) Arterial Chemoreceptors. ISAC XXI 2022. Advances in Experimental Medicine and Biology, vol 1427. Springer, Cham. https://doi.org/10.1007/978-3-031-32371-3_10
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