{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T15:43:31Z","timestamp":1791474211400,"version":"4.3.4"},"reference-count":35,"publisher":"European Respiratory Society (ERS)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur Respir J"],"accepted":{"date-parts":[[2004,6,9]]},"published-print":{"date-parts":[[2004,10]]},"abstract":"<jats:p>Hormones play a modulating role in allergic inflammation. An inverse relationship between atopy and diabetes mellitus was reported. The mechanisms regulating this interaction are not completely understood. This study examined whether insulin influences mast cell activation following antigen challenge in rats.<\/jats:p><jats:p>The experimental design included alloxan-induced diabetic rats and matching controls. Experiments were performed 30 days after alloxan injection. The animals were sensitised by<jats:italic>s.c.<\/jats:italic>injection of ovalbumin (OA) and aluminium hydroxide. OA-induced airway contraction, morphometric analysis of airway mast cells and tissue histamine quantification were evaluated in the isolated main bronchus and intrapulmonary bronchus upon exposure to antigen<jats:italic>in vitro<\/jats:italic>.<\/jats:p><jats:p>Relative to controls, a reduced contraction to OA was observed in bronchial segments isolated from diabetic rats. This was accompanied by a 50% reduction in the number of degranulated mast cells and in histamine release. A complete recovery of the impaired responses was observed under the influence of insulin.<\/jats:p><jats:p>In conclusion, the data suggested that insulin might modulate the controlling of mast cell degranulation; therefore, the early-phase response to antigen provocation, which represents a new insight into a better understanding of the mechanisms, accounted for the decreased risk of asthma among type-1 diabetic patients.<\/jats:p>","DOI":"10.1183\/09031936.04.00130803","type":"journal-article","created":{"date-parts":[[2004,9,30]],"date-time":"2004-09-30T21:28:32Z","timestamp":1096579712000},"page":"552-558","source":"Crossref","is-referenced-by-count":51,"title":["Down-regulation of mast cell activation and airway reactivity in diabetic rats: role of insulin"],"prefix":"10.1183","volume":"24","author":[{"given":"S.C.","family":"Cavalher-Machado","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"W. 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