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Öğe An alternative way to cover ventral penile skin defect in Mathieu technique(Hippokrates Verlag Gmbh, 2000) Koltuksuz, U; Gürsoy, MH; Aydinç, M; Mutus, M; Çetin, S; Karaman, AMathieu technique is used satisfactorily in distal penile hypospadias without chordee or with minimal chordee. After using this technique, a large defect may sometimes appear on the ventral surface of the penis. To cover the defect, a few techniques, including preputial island flap, Byar's flap and Ombredanne-Nesbit's flap, are used. We describe a new flap to cover the defect more cosmetically. Twenty-four patients ranging in age from one year to 14 years (median age 6.5 years) were operated on. In the patients for whom the defect could not be covered primarily, a longitudinal incision was made along the midline through the penile shaft skin from penile radix up to the border of preputial skin. The relaxed penile skin, which was incised on the dorsal surface, could be approached and sutured easily on the ventral surface without stretching. The new defect that developed on the dorsal surface was closed with the prepuce matching the defect. Nine patients, two with chordee and seven without chordee, underwent this technique. The cosmetic and functional results were excellent in all patients and none of the patient's parents complained about the cosmetic aspect. Only one fistula complication, which healed spontaneously, developed on the 20th postoperative day. Considering these results, we may conclude that excellent cosmetic results can be accomplished by the use of this flap technique.Öğe Caffeic acid phenethyl ester prevents intestinal reperfusion injury in rats(W B Saunders Co-Elsevier Inc, 1999) Koltuksuz, U; Özen, S; Uz, E; Aydinç, M; Karaman, A; Gültek, A; Akyol, ÖBackground/Purpose: Ischemia-reperfusion injury is encountered frequently in conditions that diminish intestinal blood flow. Caffeic acid phenethyl ester (CAPE), which is a specific component of the honeybee hive product propolis, exhibits potential antioxidant: properties. This experimental study was designed to determine the effect of CAFE on ischemia-reperfusion injury in rat intestine. Methods: Fifty rats were divided into 5 groups: sham (SH), saline ischemia (SI), saline reperfusion (SR), CARE ischemia (CI), and CARE reperfusion (CR). Either CAFE, 10 mu mol/kg, or saline was administered intraperitoneally 30 minutes before ischemia. Intestinal ischemia for 30 minutes and reperfusion for 60 minutes were applied. Ileum specimens were obtained to determine the tissue levels of malondialdehyde, superoxide dismutase, catalase, and histological changes. Results Malondialdehyde levels in the CR group did not increase after reperfusion when compared with the CI group. However, statistically significant differences were observed between the SR and SI groups. Additional mucosal injury in the CR group when compared with the CI group was not observed. Whereas, there was a statistically significant increase in mucosal injury in the SR group. Reperfusion did not cause further injuries through both biochemical and histological parameters in the CR group. Conclusions: Results of this study showed that prophylactic administration of CAFE in ischemic condition prevents reperfusion injuries by eliminating oxygen radicals and inhibiting polymorphonuclear leukocyte infiltration. CARE may be useful in combating the diseases of oxidative stress. J Pediatr Surg 34:1458-1462. Copyright (C) 1999 by W.B. Saunders Company.Öğe Delayed gastric emptying in gastroesophageal reflux disease(Springer, 2005) Demirbilek, S; Karaman, A; Gürünlüoglu, K; Akin, M; Tas, E; Aksoy, RT; Kekilli, EThe association between gastroesophageal reflux (GER) and intestinal malrotation (IM) has been well described. Delayed or impaired gastric emptying in IM is thought to be a contributing factor in the development of gastroesophageal reflux disease (GERD). The current study assessed the role of malrotation in delayed gastric emptying in children with GERD. We also evaluated the interactions between GERD, malrotation, gastric pH abnormalities, and gastric dysmotility. Sixty-seven patients between 1 and 5 years of age ( mean 3.08 +/- 1.2) and with symptoms of GER, such as emesis, reactive or recurrent lung disease, and/or growth retardation, were studied in 2001 - 2005. Upper and lower gastrointestinal contrast studies were performed for the diagnosis of malrotation. Gastric motility was evaluated with a liquid gastric emptying protocol. GER was documented by upper gastrointestinal studies, scintigraphy, and/or 24- h pH monitoring. In our series of 44 children with GERD, there was an unexpectedly high incidence of IM: 54.5% (24/44). IM has previously been known to occur in 25% of patients with GERD. GERD was found in 24 (82.7%) of 29 patients with IM. Mean nuclear gastric emptying (MNGE) was 51.6 +/- 8.04 min in patients with isolated GERD and 96.6 +/- 20.5 min in children with IM and GERD. There was a statistically significant difference in MNGE time ( p< 0.05) between children with primary GERD and in those with GERD and IM. Esophageal pH monitoring showed that mean fraction time below pH 4 was 7.06 +/- 1.1% in patients with isolated GERD and 14.7 +/- 4.1% in patients with IM and GERD. GERD is common in children between 1 and 5 years old. Using gastric emptying studies and esophageal pH monitoring, we have shown that gastric dysmotility and esophageal pH abnormalities are highly prevalent, especially in children with malrotation compared with children with isolated GERD. These findings suggest that malrotation is an important factor responsible for delayed gastric emptying in GERD. Hence, we recommend that all infants and children with GERD and delayed gastric emptying undergo careful evaluation for malrotation.Öğe Does pneumoperitoneum always require laparotomy?: Report of six cases and review of the literature(Springer, 2005) Karaman, A; Demirbilek, S; Akin, M; Gürünlüoglu, K; Irsi, CThe presence of intraperitoneal free air signals perforation of a hollow viscus in over 90% of the patients. Rarely, however, the presence of pneumoperitoneum may not indicate an intra-abdominal perforation and thus may not require laparotomy. This condition, which poses a dilemma to the surgeon faced with this problem, is termed nonsurgical, spontaneous or idiopathic pneumoperitoneum. Six cases of nonsurgical pneumoperitoneum admitted over a 2-year period to our institution are reported, and the etiological mechanisms and the pathophysiology of the appearance of intra-abdominal free gas are reviewed. Two of the six children with nonsurgical pneumoperitoneum underwent exploratory laparotomy when clinical examination suggested an acute abdomen; no intra-abdominal pathology was documented in one of these patients. In the other children, malrotation was found. Four patients, on ventilatory support, were managed conservatively after performing a diagnostic peritoneal lavage and/or contrast studies those were negative. An appreciation of the condition and its likely etiological factors should improve awareness and possibly reduce the imperative to perform emergency laparotomy on an otherwise well patient with an unexplained pneumoperitoneum.Öğe The effect of caffeic acid phenethyl ester on ischemia-reperfusion injury in comparison with ?-tocopherol in rat kidneys(Springer-Verlag, 2001) Irmak, MK; Koltuksuz, U; Kutlu, NO; Yagmurca, M; Özyurt, H; Karaman, A; Akyol, ÖOxygen-derived free radicals have been implicated in the pathogenesis of renal injury after ischemia-reperfusion. Caffeic acid phenethyl ester (CAPE), an active component of propolis extract, exhibits antioxidant and anti-inflammatory properties. To determine whether CAPE offers any advantage over alpha -tocopherol, we compared their effects on an in vivo model of renal ischemia-reperfusion injury in rats. CAFE at 10 mu mol/kg or alpha -tocopherol at 10 mg/kg was administered intraperitoneally before reperfusion. Acute administration of CAFE suppressed ischemia-reperfusion induced renal lipid peroxidation and tissue injury more than alpha -tocopherol. CAFE may therefore offer a therapeutic advantage in acute injury settings.Öğe Effects of caffeic acid phenethyl ester and epidermal growth factor on the development of caustic esophageal stricture in rats(W B Saunders Co, 2001) Koltuksuz, U; Mutus, HM; Kutlu, R; Özyurt, H; Çetin, S; Karaman, A; Gürbüz, NBackground/Purpose: An experimental study was performed to modify the healing response in caustic esophageal burns to prevent stricture development. Two different agents with different modes of actions, caffeic acid phenethyl ester (CAPE) and epidermal growth factor (EGF), were studied. CAPE has antiinflammatory, immunomodulatory, antioxidant, and antimitotic properties. EGF has known properties in supporting wound healing and in protecting esophagus from injuries. Methods: The model described by Gehanno and its modification by Liu was used to create standard esophageal burns with 50% NaOH. The study was performed with 76 rats in 4 main groups (sham, CAPE, EGF, and control) and 2 subgroups in each for 5 and 28 days of observation. Efficacy of treatment was assessed in 28-day subgroups by measuring weight gain, contrast esophagograms on day 27, histologic evaluation by measuring stenosis index (wall thickness/lumen diameter), and collagen deposition, and biochemically by determining tissue hydroxy proline (OHP) content. Results: In the end of the study, increase rates of mean body weights of the animals in the 28-day subgroups were as follows: sham, 30%; CAPE, 23%; EGF, 22%; and control, 14%. Although all the animals in subgroups significantly gained weight, the mean weight gain was significantly low in controls when compared with sham, CAPE, and EGF groups (P < .05). Contrast esophagograms on day 27 showed no stenosis in the sham, mild stenosis in CAPE and EGF, and severe stenosis with proximal dilatation in controls. Stenosis indices of the subgroups were as follows: sham, 0.29; CAPE, 0.41; EGF, 0.41; control, 0.84. Index was significantly higher in controls (P < .05). Collagen accumulation scores in the esophageal wall were as follows: Sham, 0.0; CAPE, 0.87; EGF, 0.30; control, 2.70. Scores also were significantly higher in controls (P < .05). Tissue (OHP) levels were as follows (mg/g dry tissue): Sham, 1.48; CAPE, 1.53; EGF, 1.90; control, 4.01. Production of OHP was significantly higher in controls. Conclusions: The results of the parameters in the study indicate that administration of CAPE and EGF has beneficial effects in the prevention of caustic esophageal strictures. Those effects of CAPE may occur through its antiinflammatory, immunomodulatory, and antioxidant properties, and EGF may occur through its induced proliferative properties on the esophagus. Copyright (C) 2001 by WB. Saunders Company.Öğe The effects of methylene blue on lung injury in septic rats(Karger, 2006) Demirbilek, S; Sizanli, E; Karadag, N; Karaman, A; Bayraktar, N; Turkmen, E; Ersoy, MOPurpose: We aimed to investigate the effects of methylene blue (MB) on NO production, myeloperoxidase (MPO) activity, antioxidant status and lipid peroxidation in lung injury during different stages of sepsis in rats. Material and Methods: Rats were randomly divided into 4 groups (n = 20): group C, sham operated; group CMB, sham operated and receiving MB (25 mg/kg, i.p.); group S, sepsis; group SMB, sepsis and receiving MB (25 mg/ kg, i.p.). Sepsis was induced by cecal ligation and puncture (CLP). The MB dose was administered after CLP. Each group was subdivided into two subgroups (n = 10) which were sacrificed at 9 or 18 h after the surgical procedure. The levels of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-PX) and MPO activity, total nitrite/nitrate and malondialdehyde (MDA) in the lung tissue were measured. Lung injury was graded from 1 (injury to 25% of the field) to 4 (diffuse injury) by the pathologist. Results: In group SMB, while SOD and CAT increased in both early and late sepsis periods, GSH-PX increased significantly only in the early sepsis period when compared with group S. Increase in lung MPO activity after CLP-induced sepsis was prevented by MB administration. MB significantly decreased to nitrite/nitrate and MDA levels both in early and late sepsis periods when compared with group S (p < 0.05). Group S showed a marked increase in neutrophil infiltration into the interstitial space and thickening of the alveolar septa, whereas the alveolar damage score was lower in the SMB group (p < 0.05). Conclusion: MB reduced the MPO activity and lipid peroxidation by both decreasing oxidative stress and NO overproduction in the lungs, which resulted in the attenuation of lung injury after CLP-induced sepsis in rats. Copyright (c) 2006 S. Karger AG, Basel.Öğe Effects of polyenylphosphatidylcholine on cytokines, nitrite/nitrate levels, antioxidant activity and lipid peroxidation in rats with sepsis(Springer, 2004) Demirbilek, S; Ersoy, MÖ; Demirbilek, S; Karaman, A; Bayraktar, M; Bayraktar, NObjectives: To determine the effect of pretreatment with polyenylphosphatidylcholine ( lecithin, PPC) on plasma levels of tumor necrosis factor ( TNF)-alpha, interleukin (IL)-6, IL-10, total nitrite/nitrate (NOx), and tissue levels of superoxide dismutase ( SOD) and malondialdehyde (MDA) in septic rats. Design: Prospective, randomized, controlled animal study. Setting: University laboratory. Subjects: Forty-five Spraque-Dawley rats were divided into three groups: group C, sham-operated; group S, sepsis; and group P, sepsis pretreated with PPC. Interventions: Rats were made septic by cecal ligation and puncture (CLP). Group P rats were treated with PPC ( 100 mg/day orally) for 10 days before sepsis. Twenty-four hours later CLP, plasma concentrations of TNFalpha, IL-6 and IL-10 and plasma levels of NOx were measured. SOD and MDA were determined in liver, lung and heart homogenates. Measurements and main results: All rats in group P survived during the 24-h observation time after CLP, whereas survival rate in group S was 66.7% (10/15; P< 0.05). PPC significantly reduced plasma levels of TNF-alpha (P= 0.006), IL-6 ( P= 0.007), IL-10 ( P= 0.016), NOx ( P< 0.001), and tissue levels of MDA ( P< 0.001) in group P with respect to in group S. Tissue levels of SOD significantly increased in group P when compared with group S ( P< 0.001). Conclusions: These results show that PPC pretreatment exerts cumulative effects in decreasing the levels of cytokines, NOx, and tissue MDA concentrations, with a concomitant increase in survival in septic rats. Lecithin therapy may be a useful adjuvant therapy in controlling of the excessive production of the inflammatory cytokines in patients with severe sepsis. Descriptor: SIRS/sepsis, experimental studies.Öğe Glial cell line-derived neurotrophic factor and synaptophysin expression in pelviureteral junction obstruction(Elsevier Science Inc, 2006) Demirbilek, S; Edali, MN; Gürünlüoglu, K; Türkmen, E; Tas, E; Karaman, A; Akin, MObjectives. To examine the expression of neuronal markers in congenital pelviureteral junction (PUJ) obstruction as a causative factor. The findings from some investigations have suggested that defective neuronal innervation may play an important role in the pathogenesis of PUJ obstruction. Methods. Using specific antibodies, we studied the neuronal markers of specimens from 12 cases of PUJ obstruction and 10 normal PUJs by immunohistochemistry using glial cell line-derived neurotrophic factor (GDNF), synaptophysin, S-100, and neurofilament. Results. In the PUJ obstruction specimens, staining with hematoxylin-eosin and Masson's trichrome revealed muscular hypertrophy and an increase in collagen tissue and fibrosis in the lamina propria and tunica muscularis. The most striking finding on immunohistochemistry was the marked nuclear staining of cells with synaptophysin in all layers of the PUJ obstruction specimens that was totally absent in the normal PUJ specimens. In addition, significantly less intense staining for GDNF was found in the PUJ obstruction specimens compared with the normal PUJ specimens. The underexpression of GDNF in PUJ obstruction specimens was localized in the muscular layer especially. Immunohistochemical staining for S-100 and neurofilament showed no differences in the expression level of these neuronal markers in normal and PUJ obstruction specimens. Conclusions. Because GDNF is a survival factor for central and peripheral neurons, defective expression of GDNF could play an important role in the defective neuronal innervation of PUJ obstruction. Intense nuclear expression of synaptophysin in all layers of obstructed PUJ specimens suggested that obstructed PUJs have a serious structural abnormality.Öğe Plasma superoxide dismutase activity and malondialdehyde level correlate with the extent of acute appendicitis(Springer-Verlag, 2000) Koltuksuz, U; Uz, E; Özen, S; Aydinc, M; Karaman, A; Akyol, ÖAlthough the mechanism of acute appendicitis (AA) is partly understood, the progression following the onset of inflammation has not yet been clarified. To determine oxidative activities in the plasma of patients with AA, superoxide dismutase (SOD) activities and malondialdehyde (MDA) levels were measured in samples from 31 patients diagnosed as having AA and 10 otherwise healthy children with inguinal pathologies. The patients with AA were divided into three subgroups: acute focal (AFA) (n = 8), acute suppurative (ASA) (n = 9), and acute perforated appendicitis (APA) (n = 14), according to the intraoperative findings and histopathologic examination.. SOD and MDA were compared statistically between these subgroups and between them and the control group. Additionally, mean leukocyte counts of each group were determined and the differences between the groups were evaluated. Both SOD and MDA were significantly higher in the ASA and APA groups compared to controls and AFA group. The mean leukocyte numbers of the ASA and APA groups were significantly higher compared to the AFA group. Based to these results, it may be speculated that oxygen free radicals (OFR) may play an important role in the extent of AA. To prevent the hazardous effects of OFR, the organism may increase SOD and other antioxidant enzyme levels and/or activities.Öğe Polyenylphosphatidylcholine pretreatment protects rat liver from ischemia/reperfusion injury(Elsevier Ireland Ltd, 2006) Demirbilek, S; Karaman, A; Gürünlüoglu, K; Tas, E; Akin, M; Aksoy, RT; Türkinen, EBackground: Hepatic injury induced by ischemia/reperfusion following surgery, transplantation, or circulatory shock combined with resuscitation is a major clinical problem. Polyenylphosphatidylcholine (PPC) has strong antioxidant, cytoprotective and anti-inflammatory effects. Aim: In this study, the influence of PPC pretreatment on ischemia-reperfusion (I/R) injury of the liver was examined in rats. Methods: The animals were divided into three groups: control (n = 10), I/R (n = 15) and IIR + PPC (n = 15). PPC was given 100 mg/day for 7 days before experiment. Several parameters of hepatic damage, oxidative stress, neutrophil infiltration and nuclear factor kappa beta (NF-kappa B) expression were measured as well as microscopic examination. Results: We observed that a significant reduction in AST and ALT values in the PPC treated group when compared with the ischemic group. The increases in hepatic total NO2 + NO3 and MDA, and decreases in SOD and GSH levels after reperfusion were partially, but significantly, inhibited by PPC pretreatment. I/R induced increase in hepatic myeloperoxidase content and NF-kappa B expression were also lowered by PPC pretreatment. Animals pretreated with PPC presented minimal hemorrhage and reduced signs of liver injury. Conclusion: PPC pretretament provided significant protection againts I/R injury to the liver. This treatment could be therapeutic in liver transplantation and other conditions associated with I/R injury. (c) 2005 Elsevier Ireland Ltd. All rights reserved.Öğe Protective effect of polyunsaturated phosphatidylcholine on liver damage induced by biliary obstruction in rats(W B Saunders Co-Elsevier Inc, 2003) Karaman, A; Demirbilek, S; Sezgin, N; Gürbüz, N; Gürses, IBackground/Purpose: Persistent inflammatory response secondary to congenital or acquired biliary choleastasis plays an important role in the pathophysiology of hepatic tissue damage. The polyunsaturated fatty acids (PUFA) have been shown to suppress the inflammatory reactions in vivo and in vitro. PUFA has been shown also to protect againts various types of experimental liver damage in animal models and isolated hepatocytes. Therefore, the aim of this study was to investigate the protective effect of PUFA administration on liver damage using the rat chronic biliary obstruction model. Methods: Swiss albino rats of either sex were divided into 4 groups as follows: control group (group 1, 10 rats); rats with sham operation and treated with saline group 2, 10 rats); rats with biliary obstruction (group 3, 15 rats); and polyunsaturated phophatidylcholine (PPC)-treated rats with biliary obstruction (Group 4, 15 rats). Biliary obstruction was induced by double ligation and division of the common bile duct. PUFA treatment was started 2 weeks later from biliary obstruction in doses of 50 mg/d per rat and continued for 2 weeks. All animals were killed after 4 weeks of common bile duct ligation or sham operation. Liver damage and cholestasis were determined by biochemical and histologic examinations. Results: The data showed a decrease in plasma bilirubin level (both conjugated and unconjugated) and liver enzyme levels (AST, ALT, AP, GGT, 5'-NT) in group 4, when compared with group 3 (P < .05). Tissue levels of malondialdehyde (MDA) in group 4 was 20.00 +/- 2.93 compared with that in group 3, 27.12 +/- 2.96 (P < .05). Administration of PUFA to the biliary obstructed rats resulted in inhibition of collagen accumulation (P < .05) and ductal proliferation (P < .05). Conclusions: PUFA reduced liver damage, ductular proliferation, and fibrosis in biliary obstructed rats. These effects suggest that it might be a useful agent to preserve liver function in patients with biliary obstruction such as biliary atresia. (C) 2003 Elsevier Inc. All rights reserved.Öğe Protective effect of polyunsaturated phosphatidylcholine pretreatment on stress ulcer formation in rats(W B Saunders Co-Elsevier Inc, 2004) Demirbilek, S; Gürses, I; Sezgin, N; Karaman, A; Gürbüz, NPurpose: The aim of this study was to investigate whether polyunsaturated phosphatidylcholine. (PPC) pretreatment has any protective effect on gastric mucosal damage induced by cold-restraint stress (CRS) in rats. Methods: Forty swiss albino rats were divided into 3 groups. Group 1 (n = 10) was control, group 2 (n = 15) was stress ulcer, and group 3 (n = 15) was PPC-treated rats with stress ulcer. Stress ulcer was induced by the cold-restraint method for 4 hours at 4degreesC after a starvation period of 72 hours. In the group 3 rats, PPC treatment was started 10 days before stress at a dose of 100 mg/d by oral route. Rats were terminated, stomachs were excised. Macroscopic ulcer index (UI), gastric tissue malondialdehyde (MDA) and superoxide dismutase (SOD) activities, plasma total nitrite, and erythrocyte catalase (CAT) concentrations were assayed. Results: Histopathologic examination showed a stress ulcer index of 0.12 +/- 0.19 mm in the treatment group and 23.6 +/- 8.97 mm in the stress ulcer group (P < .001). Tissue MDA and SOD concentrations were higher in the stress ulcer group than in the treatment group, the differences were statistically significant (P < .001). Plasma NO3- + NO2- levels were higher (P < .005) and CAT levels were lower (P < .001) in the nontreatment group. There were no significant differences with respect to UI, MDA, and SOD levels among the control and treatment groups (P > .05). Conclusions: These results suggest that pretreating rats with PPC inhibits cold-restraint stress-induced gastric mucosal injury and might be useful in preventing stress-induced stomach ulcers. (C) 2004 Elsevier Inc. All rights reserved.Öğe Protective effects of leflunomide against ischemia-reperfusion injury of the rat liver(Springer, 2006) Karaman, A; Fadillioglu, E; Turkmen, E; Tas, E; Yilmaz, ZHepatic ischemia-reperfusion (I/R) injury may be developed in some conditions, such as trauma, major hepatic resection, hemorrhagic shock or liver transplantation. I/R injury of the liver causes hepatocellular damage that may lead to hepatic failure. A considerable body of evidence indicates that reactive oxygen species (ROS) and inflammation may contribute to hepatocellular injury in liver I/R. Leflunomide is an isoxazole derivative, and a unique immunomodulatory agent. In the present study, we examined the effects of leflunomide on the neutrophil activation with oxidative stress and some antioxidant enzymes in the reperfusion following I/R in the rat liver. Thirty-two rats divided into four groups: group 1 (control); was given leflunomide 10 mg/kg, i.g.; group 2 (SHAM), animals were only laparotomized; group 3 (liver I/R), and group 4 (liver I/R + Leflunomide). In group 4, rats were pretreated with leflunomide (10 mg/kg, i.g.) two doses prior to experiment. In groups 3 and 4, occluding the hepatic pedicel for 60 min induced ischemia and reperfusion was allowed thereafter for 60 min. At the end of the reperfusion period, rats were sacrificed. superoxide dismutase, catalase, nitric oxide, xanthine oxidase, malondialdehyde, protein carbonyl and myeloperoxidase levels were determined in hepatic tissue as well as histological examination with H and E staining. Group 3 animals demonstrated severe deterioration of liver morphology and a significant liver oxidative stress. Pretreatment of animals with leflunomide markedly attenuated morphological alterations and neutrophil activation, reduced elevated oxidative stress products levels and restored the depleted hepatic antioxidant enzyme. The findings imply that ROS play a causal role in I/R-induced hepatic injury, and leflunomide exerts hepatoprotective effects probably by the anti-inflammatory effect with radical scavenging and antioxidant activities.Öğe Small-dose capsaicin reduces systemic inflammatory responses in septic rats(Lippincott Williams & Wilkins, 2004) Demirbilek, S; Ersoy, MO; Demirbilek, S; Karaman, A; Gürbüz, N; Bayraktar, N; Bayraktar, MWe investigated the influence of small- and large-dose capsaicin in modulating systemic inflammatory responses during different stages of sepsis in rats. Rats were divided into six groups: group C, control; group S, sepsis; group CLC, small dose of capsaicin (1 mg/kg subcutaneously); group SLC, small dose of capsaicin plus sepsis; group CHC, large dose of capsaicin (150 mg/kg subcutaneously); group SHC, large dose of capsaicin plus sepsis. Rats were made septic by cecal ligation and puncture (CLP). Each group was subdivided into two subgroups. The animals were killed at 9 or 18 h after CLP. Plasma concentrations of calcitonin gene-related peptide (CGRP), tumor necrosis factor (TNF)-alpha, interleukin (IL)-6, IL-10, and total nitrite/nitrate (NOx) were measured. Superoxide dismutase and malondialdehyde (MDA) were determined in liver, lung, and heart tissues. CGRP was increased in groups S, CLC, and SLC when compared with the other groups. In the SLC group, plasma concentrations of TNF-alpha, IL-6, NOx, and tissue MDA levels were reduced and IL-10 level was increased when compared with groups S and SHC 18 h after CLP (P < 0.05). Small-dose capsaicin treatment increased antiinflammatory IL-10 levels and attenuated the increases in proinflammatory cytokines, NOx, and tissue MDA in septic rats.Öğe Testicular nitric oxide levels after unilateral testicular torsion/detorsion in rats pretreated with caffeic acid phenethyl ester(Springer-Verlag, 2000) Koltuksuz, U; Irmak, MK; Karaman, A; Uz, E; Var, A; Özyurt, H; Akyol, ÖNitric oxide (NO) plays an important role in modulating blood flow in normal and in several pathological conditions, and its levels seem to change with ischemia-reperfusion injuries. Caffeic acid phenethyl ester (CAPE), an active component of propolis, exhibits antioxidant properties. This experimental study was designed to determine the changes in NO levels and the effect of CAPE on NO levels after testicular torsion/ detorsion in rats. Thirty-five adult male albino rats were divided into four groups: sham operation (n = 8), torsion (n = 9), saline/detorsion (n = 9), and CAPE/detorsion (n = 9). Rats in the sham operation group were killed after the testes were handled without torsion. Rats in the torsion group were killed after 720 degrees clockwise testicular torsion for 2 h. CAPE was administered 30 min before detorsion in the CAPE/detorsion group and saline was administered in the saline/detorsion group. After 4 h of testicular detorsion in both of these groups, the rats were killed and bilateral orchiectomy was performed to determine the tissue levels of NO. The level of NO in the torsion group (113.77 +/- 33.18 nmol/g protein) was significantly higher than that of the sham operation group (64.53 +/- 29.64 nmol/g protein). In the saline/detorsion group, the NO level (31.26 +/- 12.58 nmol/g protein) was significantly lower than in the torsion and sham operation groups. CAPE administration in the CAPE/detorsion group seemed to raise the NO level (72.63 +/- 23.87 nmol/g protein) above the level of the sham operation group. Contralateral testes were not affected by the torsion/detorsion processes performed on the ipsilateral testes. These results show that NO levels increase with torsion and decrease with detorsion. CAPE administration seems to increase tissue NO levels and this may be important for protecting the testes from torsion/detorsion injuries.
