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Splanchnic PGI2 release and "no reflow" following intestinal reperfusion. J Surg Res 1995 Jun;58(6):558-64

Date

06/01/1995

Pubmed ID

7791328

DOI

10.1006/jsre.1995.1088

Scopus ID

2-s2.0-0028989904   26 Citations

Abstract

This study examines the hypothesis that reduced splanchnic blood flow during intestinal reperfusion (IR) is associated with impaired release of the vasodilatory prostanoid PGI2. Sprague-Dawley rats underwent occlusion of the superior mesenteric artery (SMA) for 120 min and reperfusion for up to 60 min. SMA blood flow was measured by transonic flow probe and radiolabeled microspheres (141Ce and 103Ru). Sham-operated animals served as controls (SHAM). Splanchnic eicosanoid release was quantitated by measuring thromboxane B2 (TxB2, stable metabolite of TxA2), 6-keto-PGF1a (6-keto, stable metabolite of PGI2), and PGE2 within the portal vein (PV) and inferior vena cava (IVC) of animals sustaining IR and SHAM. SMA flow in IR animals was < 10% of baseline and 27% of SHAM when measured by transonic flow probe (8 +/- 2% and 29 +/- 3%, IR and SHAM, respectively, P < 0.05). Similar results were obtained when intestinal blood flow was measured with microspheres (0.33 +/- 0.12 vs 1.34 +/- 0.13 ml/min/g, IR vs SHAM, P < 0.05). The greatest change in IR-induced splanchnic eicosanoid release occurred with 6-keto. Following ischemia, 6-keto levels in the PV were twice those of SHAM (P < 0.05). Five minutes after reperfusion, PV 6-keto levels were 22 times those of controls (P < 0.05) and 4 times greater than those of the IVC (P < 0.05). By 60 min of reperfusion, levels of 6-keto were reduced to those in the IVC. These data support the hypothesis that splanchnic blood flow is critically reduced by severe IR.(ABSTRACT TRUNCATED AT 250 WORDS)

Author List

Turnage RH, Kadesky KM, Bartula L, Guice KS, Oldham KT, Myers SI

Author

Keith T. Oldham MD Professor in the Surgery department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Animals
Dinoprostone
Epoprostenol
Intestines
Male
Rats
Rats, Sprague-Dawley
Reperfusion Injury
Splanchnic Circulation
jenkins-FCD Prod-387 b0ced2662056320369de4e5cd5f21c218c03feb3