{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T17:19:05Z","timestamp":1773422345538,"version":"3.50.1"},"reference-count":17,"publisher":"American Diabetes Association","issue":"10","content-domain":{"domain":["diabetesjournals.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,10,1]]},"abstract":"<jats:p>Vascular reactivity to nitric oxide (NO) is mediated by NO-sensitive soluble guanylyl cyclase (sGC). Since a diminished activity of vascular sGC has been reported in an animal model of type 2 diabetes, the sGC activity was assayed in vitro in internal mammary artery specimens obtained during bypass surgery from patients with and without type 2 diabetes. The sensitivity of sGC to NO, which is dependent on Fe2+-containing heme, was measured in vitro using stimulation with diethylamine NONOate (DEA\/NO). In addition, the novel cyclic guanosine monophosphate\u2013elevating compound HMR-1766 was used to test the stimulation of the oxidized heme-Fe3+\u2013containing form of sGC. Basal activity of sGC and its sensitivity to stimulation by DEA\/NO and HMR-1766 were not different between control and type 2 diabetic patients: maximum stimulation by DEA\/NO amounted to 475 \u00b1 67 and 418 \u00b1 59 pmol \u00b7 mg\u22121 \u00b7 min\u22121 in control and type 2 diabetic patients, respectively. The maximum effects of HMR-1766 were 95 \u00b1 18 (control subjects) and 83 \u00b1 11 pmol \u00b7 mg\u22121 \u00b7 min\u22121 (type 2 diabetic patients). Hypertension, hyperlipidemia, drug treatment with statins, ACE inhibitors, or nitrates had no effect on sGC activity. In conclusion, the present findings do not support the hypothesis that desensitization of sGC contributes to the pathogenesis of diabetic vascular dysfunction in humans.<\/jats:p>","DOI":"10.2337\/diabetes.53.10.2640","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T19:04:22Z","timestamp":1173207862000},"page":"2640-2644","update-policy":"https:\/\/doi.org\/10.2337\/ada-journal-policies","source":"Crossref","is-referenced-by-count":12,"title":["Nitric Oxide\u2013Sensitive Soluble Guanylyl Cyclase Activity Is Preserved in Internal Mammary Artery of Type 2 Diabetic Patients"],"prefix":"10.2337","volume":"53","author":[{"given":"Klaus","family":"Witte","sequence":"first","affiliation":[{"name":"Faculty of Clinical Medicine Mannheim, Institute of Pharmacology and Toxicology, University of Heidelberg, Mannheim, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jochen","family":"Hachenberger","sequence":"additional","affiliation":[{"name":"Faculty of Clinical Medicine Mannheim, Institute of Pharmacology and Toxicology, University of Heidelberg, Mannheim, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria F.","family":"Castell","sequence":"additional","affiliation":[{"name":"Department of Thoracic Surgery, University of Heidelberg, Heidelberg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian F.","family":"Vahl","sequence":"additional","affiliation":[{"name":"Department of Thoracic Surgery, University of Heidelberg, Heidelberg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christlieb","family":"Haller","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine III, University of Heidelberg, Heidelberg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1167","reference":[{"key":"2022031207300286300_R1","doi-asserted-by":"crossref","unstructured":"Johnstone MT, Creager SJ, Scales KM, Cusco JA, Lee BK, Creager MA: Impaired endothelium-dependent vasodilation in patients with insulin-dependent diabetes mellitus. 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