n = 6. 20. 2 mg/dL vs . 227. 7 8. a few mg/dL, p < 0. 05) or those resuscitated with lactated Ringers answer (116. 0 20. 2 mg/dL vs . 359. 0 79. 5 mg/dL, p < 0. 05). RSV supplementation was associated with significantly decreased plasma insulin levels (1. 0 0. 4 ng/mL vs . 6. 5 3. 7 ng/mL, p < 0. 05), increased total GLP-1 levels (385. 8 56. 6 ng/mL vs . 187. 3 11. 1 ng/mL, p < 0. 05), and a lower natural Log Homeostatic Model AssessmentInsulin Resistance index (1. 30 0. 42 vs . 4. 18 0. 68, p < 0. 05) but had minimal effect on plasma corticosterone, glucagon, or cytokine levels. == SUMMARY == Resuscitation with Rabbit Polyclonal to FPRL2 RSV restores mitochondrial function and decreases insulin resistance but may be associated with increased hypoglycemia. The observed antiglycemic effects of RSV may be mediated by decreased mitochondrial ROS and increased GLP-1 secretion. Keywords: Resveratrol, hemorrhagic shock, mitochondria, blood glucose, rats Hemorrhagic shock remains a common cause of death in severely injured patients, with a significant number of deaths occurring as the result of multiple organ failure days to weeks after the initial injury. 1, 2While the etiology of multiple organ failure following trauma is likely multifactorial, increasing data suggest that persistent mitochondrial dysfunction may play a significant role. a few, 4Because mitochondria rely on oxygen to synthesize the majority of cellular adenosine triphosphate (ATP), impaired perfusion results in decreased energy stores and direct cellular damage. 5Moreover, with reperfusion, injured mitochondria cannot effectively transfer electrons, resulting in a deluge of reactive oxygen species (ROS) that further damage tissues and trigger apoptosis. 6Improving mitochondrial function, therefore , is an important step in mitigating hemorrhage-induced organ damage. Mitochondrial dysfunction also contributes to the phenomenon of postinjury hyperglycemia. In addition to directly damaging mitochondrial proteins and impairing function, ROS can activate various serine kinases that regulate insulin signaling. 7, 8Moreover, postinjury insulin resistance and hyperglycemia can be minimized by blocking the production of ROS. 9Because hyperglycemia is an independent risk element for undesirable outcomes, including death in trauma patients, 10resuscitation strategies that either mitigate oxidative stress or improve glycemic control could prove beneficial. Resveratrol (RSV), a naturally occurring polyphenol found in red wine, has been shown to promote mitochondrial function and regulate glucose in a variety of disease says. 11, 12In models of obesity and diabetes, RSV supplementation has been shown to promote mitochondrial biogenesis, increase insulin sensitivity, improve glucose tolerance, and suppress inflammation and oxidative stress. 11, 13When used in models of hemorrhagic shock, RSV has been shown to improve cardiac contractility, decrease hepatic dysfunction, and reduce tissue inflammation. 1417There is, however , limited information regarding the impact of RSV on mitochondrial function and glucose regulation following trauma and hemorrhagic shock. We hypothesized 3-O-(2-Aminoethyl)-25-hydroxyvitamin D3 that RSV during resuscitation would ameliorate shock-induced mitochondrial dysfunction and improve hyperglycemia following acute blood loss. == MATERIALS AND METHODS == == Experimental Protocol == All animal procedures were approved by the Institutional Animal Treatment and Use Committee from the University of Pennsylvania and in accordance with National Institutes of Health guidelines. Male Long-Evans rats (250300 g) were housed using a 12-hour light-dark cycle with constant temperature and humidity. Animals were allowed to acclimate at least 2 days before surgery and given access to food and water ad libitum. Using a well-validated decompensated hemorrhagic shock model, 18animals were anesthetized (isoflurane, 24%) and femoral 3-O-(2-Aminoethyl)-25-hydroxyvitamin D3 vascular catheters (PE50, Braintree Scientific, Inc., Braintree, MA) were placed. A 5-cm midline laparotomy was performed to simulate soft tissue trauma. 18Surgical sites were bathed in 1% lidocaine and closed in layers. Animals received 0. 25% buprenorphine (0. 05 mg/kg) and were allowed to emerge from anesthesia. Mean arterial pressure (MAP) and heart rate (HR) were continuously monitored and recorded throughout the experiment (Digi-Med Signal Analyzers, Louisville, KY). After full reversal of anesthesia and 30 minutes of hemodynamic stability, animals were passively bled via the femoral artery and maintained at a MAP of 40 mm Hg. When the blood pressure could no longer 3-O-(2-Aminoethyl)-25-hydroxyvitamin D3 be maintained without fluid infusion, a MAP of 40 mm Hg was sustained by incrementally infusing 0. 2-mL boluses of lactated Ringers (LR) answer (Baxter Corporation, Toronto, Canada). Animals were considered to be in severe shock when 40% of the shed volume had been returned in the form of LR boluses. Animals were then resuscitated with four times the shed volume in LR solution.