{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,2,29]],"date-time":"2024-02-29T22:40:18Z","timestamp":1709246418508},"reference-count":46,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2009,1,29]],"date-time":"2009-01-29T00:00:00Z","timestamp":1233187200000},"content-version":"vor","delay-in-days":59,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["bpspubs.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["British J Pharmacology"],"published-print":{"date-parts":[[2008,12]]},"abstract":"<jats:sec><jats:title>Background and purpose:<\/jats:title><jats:p>The renal artery (RA) has been extensively investigated for the assessment of renal vascular function\/dysfunction; however, few studies have focused on the intrarenal vasculature.<\/jats:p><\/jats:sec><jats:sec><jats:title>Experimental approach:<\/jats:title><jats:p>We devised a microvascular force measurement system, which allowed us to measure contractions of interlobar arteries (ILA), isolated from within the mouse kidney and prepared without endothelium.<\/jats:p><\/jats:sec><jats:sec><jats:title>Key results:<\/jats:title><jats:p>KCl (50\u2003m<jats:sc>M<\/jats:sc>) induced similar force development in the aorta and RA but responses in the ILA were about 50% lower. Treatment of RA with 10\u2003\u03bc<jats:sc>M<\/jats:sc>phenylephrine (PE), 10\u2003n<jats:sc>M<\/jats:sc>U46619 (thromboxane A<jats:sub>2<\/jats:sub>analogue) or 10\u2003\u03bc<jats:sc>M<\/jats:sc>prostaglandin F<jats:sub>2\u03b1<\/jats:sub>elicited a response greater than 150% of that induced by KCl. In ILA, 10\u2003n<jats:sc>M<\/jats:sc>U46619 elicited a response that was 130% of the KCl\u2010induced response; however, other agonists induced levels similar to that induced by KCl. High glucose conditions (22.2\u2003m<jats:sc>M<\/jats:sc>glucose) significantly enhanced responses in RA and ILA to PE or U46619 stimulation. This enhancement was suppressed by rottlerin, a calcium\u2010independent PKC inhibitor, indicating that glucose\u2010dependent, enhanced small vessel contractility in the kidney was linked to the activation of calcium\u2010independent PKC.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion and implications:<\/jats:title><jats:p>Extra\u2010 and intrarenal arteries exhibit different profiles of agonist\u2010induced contractions. In ILA, only U46619 enhanced small vessel contractility in the kidney, which might lead to renal dysfunction and nephropathy through reduced intrarenal blood flow rate. A model has been established, which will allow the assessment of contractile responses of intrarenal arteries from murine models of renal disease, including type 2 diabetes.<\/jats:p><jats:p><jats:italic>British Journal of Pharmacology<\/jats:italic>(2008)<jats:bold>155<\/jats:bold>, 1204\u20131213; doi:<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"doi\" xlink:href=\"10.1038\/bjp.2008.365\">10.1038\/bjp.2008.365<\/jats:ext-link>; published online 22 September 2008<\/jats:p><\/jats:sec>","DOI":"10.1038\/bjp.2008.365","type":"journal-article","created":{"date-parts":[[2008,9,22]],"date-time":"2008-09-22T09:49:40Z","timestamp":1222076980000},"page":"1204-1213","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Intra\u2010 and extrarenal arteries exhibit different profiles of contractile responses in high glucose 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