{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T13:33:57Z","timestamp":1776260037619,"version":"3.50.1"},"reference-count":28,"publisher":"American Diabetes Association","issue":"2","content-domain":{"domain":["diabetesjournals.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,2,1]]},"abstract":"<jats:p>We have reported that insulin exerts two vascular actions in muscle; it both increases blood flow and recruits capillaries. In parallel hyperinsulinemic-euglycemic clamp studies, we compared the insulin dose response of muscle microvascular recruitment and femoral blood flow as well as hindleg glucose uptake in fed, hooded Wistar and fasted Sprague-Dawley rats. Using insulin doses between 0 and 30 mU\u22121 \u00b7 min\u22121 \u00b7 kg\u22121, we measured microvascular recruitment at 2 h by 1-methylxanthine (1-MX) metabolism or contrast-enhanced ultrasound (CEU), and muscle glucose uptake was measured by either arteriovenous differences or using 2-deoxyglucose. We also examined the time course for reversal of microvascular recruitment following cessation of a 3 mU \u00b7 min\u22121 \u00b7 kg\u22121 insulin infusion. In both groups, whether measured by 1-MX metabolism or CEU, microvascular recruitment was fully activated by physiologic hyperinsulinemia and occurred at lower insulin concentrations than those that stimulated glucose uptake or hindleg total blood flow. The latter processes were insulin dose dependent throughout the entire dose range studied. Upon stopping the insulin infusion, increases in microvascular volume persisted for 15\u201330 min after insulin concentrations returned to basal levels. We conclude that the precapillary arterioles that regulate microvascular recruitment are more insulin sensitive than resistance arterioles that regulate total flow.<\/jats:p>","DOI":"10.2337\/diabetes.53.2.447","type":"journal-article","created":{"date-parts":[[2007,3,6]],"date-time":"2007-03-06T19:04:22Z","timestamp":1173207862000},"page":"447-453","update-policy":"https:\/\/doi.org\/10.2337\/ada-journal-policies","source":"Crossref","is-referenced-by-count":137,"title":["Insulin Sensitivity of Muscle Capillary Recruitment In Vivo"],"prefix":"10.2337","volume":"53","author":[{"given":"Lei","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Biochemistry, University of Tasmania, Hobart, Tasmania, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michelle A.","family":"Vincent","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, University of Virginia, Charlottesville, Virginia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen M.","family":"Richards","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, University of Tasmania, Hobart, Tasmania, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lucy H.","family":"Clerk","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, University of Virginia, Charlottesville, Virginia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephen","family":"Rattigan","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, University of Tasmania, Hobart, Tasmania, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael G.","family":"Clark","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, University of Tasmania, Hobart, Tasmania, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eugene J.","family":"Barrett","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, University of Virginia, Charlottesville, Virginia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1167","reference":[{"key":"2022031207300245700_R1","doi-asserted-by":"crossref","unstructured":"Laasko M, Edelman SV, Brechtel G, Baron AD: Decreased effect of insulin to stimulate skeletal muscle blood flow in obese man. 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