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    Accessory spleen presenting as mass in the left upper abdomen
    (Coll Physicians & Surgeons Pakistan, 2008) Yagmur, Yusuf; Ozturk, Hayrettin
    An enlarged accessory spleen, 10 x 8 x 6 cm in diameter, adjoining the spleen appearing as a mass on CT and ultrasonography is reported herein. Accessory spleen is an ectopic mass of healthy splenic tissue separate from the main body of the spleen. It should be considered the differential diagnosis of an enlarged mass in the left upper quadrant.
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    A comprehensive analysis of 51 neonates with congenital intestinal atresia
    (Saudi Med J, 2007) Ozturk, Hayrettin; Ozturk, Hulya; Gedik, Senol; Duran, Hatun; Onen, Abdurrahman
    Objective: To determine contemporary patterns of presentation and trends in the management and outcome of 51 newborn infants with intestinal atresia. Methods: We retrospectively reviewed 51 cases of intestinal atresia between January 1983 and February 2003. Clinical data included antenatal history, age, gender, weight, presenting symptoms and signs, diagnostic procedures, location and type of atresia, associated abnormalities, surgical treatment, associated problems, morbidity, mortality and plans of treatment. Results: Twenty children had duodenal obstruction, 24 had jejunoileal atresia, and 7 had colonic atresia. Approximately one-fourth of patients associated with duodenal atresia. had preterm delivery and all patients with jejunoileal and colonic atresia were full term. Clinical features such as vomiting, abdominal distention, delayed meconium passage and jaundice were more frequent in jejunoileal atresia patients. Other associated organ anomalies particularly Down's syndrome were more frequent in duodenal atresia patients. A duodeno-duodenostomy was preferred in most of the patients with duodenal atresia and annular pancreas; duodenotomy and web excision for those with duodenal webs; and resection with end-to-end anastomosis for those with jejunoileal atresia. In all patients with colonic atresia, colostomy procedure was performed as the first step of surgery. Conclusion: Experienced neonatal care and prompt total parenteral. nutrition by placing central line during surgery may improve the outcome of such patients.
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    Continuous infusion of small-volume fluid resuscitation in the treatment of combined uncontrolled hemorrhagic shock and Head Injury
    (Coll Physicians & Surgeons Pakistan, 2007) Ozturk, Hayrettin; Yagmur, Yusuf; Tas, Askin; Topcu, Soykan; Orak, Murat
    Objective: To determine-the effect of continuous limited fluid resuscitation on the hemodynamic response and survival in rats in a model of uncontrolled hemorrhage shock due to Massive Splenic Injury (MSI) and Head Injury (HI). Design: An experimental study. Place and Duration of Study: Dicle University Animal Research Laboratory, Turkey, between January and February 2005. Subjects and Methods: Seventy Sprague-Dawley rats were used in this study. Group 1 rats (n=10) was sham-operated. In group 2 (n=10), only Massive Splenic Injury (MSI) was performed and untreated. In group 3 (n=10), only head injury (HI) was performed and untreated. In group 4 (n=10), HI and MSI were performed and were untreated. In group 5 (n=10), HI and MSI were performed and 15 minutes later treated with 7.5% NaCl. In group 6 (n=10), HI and MSI were performed, and rats were treated with Ringer's Lactate (RL) solution. In group 7 (n=10), HI and MSI were performed, rats were treated with 0.9% NaCl. In groups 2,4,5,6 and 7 midline incision was reopened and splenectomy was performed at 45 minutes. Results: In group 4 rats, Mean Arterial Pressure (MAP) was decreased from 104 +/- 6.1 mmHg to 75 +/- 19.5 mmHg at 15 minutes; heart rate decreased from 357 +/- 24.9 beats/min to 321 +/- 62.1 beats/min and hematocrit decreased from 46 +/- 1.3% to 43 +/- 2.5% (p<0.01). Similar early changes in MAP, heart rate and hematocrit were observed in groups 5, 6, and 7, at 15 minutes. At 45,60 and 120 minutes, in fluid resuscitated rats (group 5,6,7) MAP, heart rate and hematocrit values were measured higher than group 2 and 4 (p<0.01 for all). At 120 min. in group 6, hematocrit was higher than group 4, 5 and 7, in group 6, total blood loss after splenectomy was calculated at 20 +/- 2.4% of blood volume and was the best value compared to other fluid resuscitated group 5 and 7 (28% and 27% of blood volume) (p<0.01). Mortality was lower in all fluid resuscitated groups when compared to group 3 and 4 (p<0.05). The median survival time was again higher in fluid resuscitated groups. Conclusion: Continuous infusion of 7.5% NaCl, RL and 0.9% NaCl following uncontrolled hemorrhagic shock with massive splenic injury and combined head injury resulted in better survival and RL did not increase abdominal bleeding before splenectomy was performed.
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    Differential Expression of CD34, S100, and c-Kit in Interstitial Cells of Cajal in Infantile Hypertrophic Pyloric Stenosis - Immunochemical Study
    (Wroclaw Medical Univ, 2009) Ozturk, Hulya; Ozturk, Hayrettin; Yilmaz, Fahri; Okur, Hanifi; Otcu, Selcuk; Dokucu, Ali Ihsan
    Background. The pathogenesis of infantile hypertrophic pyloric stenosis (IHPS) is poorly understood although many hypotheses have been proposed. Objectives. Assessment whether the differential expression of c-Kit, CD34, and S100 may be involved in the development of IHPS. Material and Methods. Specimens from 14 infants with IHPS and seven control subjects were immunohistochemically stained for c-Kit, CD34, and S100. The numbers of CD34(+), S100(+), and c-Kit(+) cells in five random fields per specimen were compared via light microscopy (x200). Results. In normal pyloric tissue, specific and intense c-Kit immunoreactivity was observed in the muscle layers and moderate staining was observed around the myenteric plexus. In IHPS patients, c-Kit+ cells were either absent or markedly reduced around the myenteric plexus. In control and IHPS patients, CD34(+) cells were not observed around the myenteric plexus. In the vascular endothelium, moderate CD34 staining was observed in specimens from control subjects, whereas intense staining was observed for IHPS patients. In normal pyloric tissue, moderate S100 immunoreactivity was observed in the muscle layers and intense staining was observed in the myenteric plexus. In IHPS patients, few S100(+) cells were observed in the pyloric muscle layers and S100 immunoreactivity decreased markedly around the myenteric plexus. Conclusions. These results suggest that the numbers of c-Kit(+) and S100(+) cells are markedly decreased in the pyloric muscle layers and around the myenteric plexus in IHPS patients. Thus a lack of c-Kit and S100, but not CD34, expression may be a critical factor in the pathogenesis of IHPS and may serve as a useful prognostic tool in the treatment of this disease (Adv Clin Exp Med 2009, 18, 1, 33-39).
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    Distal Ileal Perforation Secondary to Ingested Foreign Bodies
    (Coll Physicians & Surgeons Pakistan, 2009) Yagmur, Yusuf; Ozturk, Hayrettin; Ozturk, Hulya
    A 22-year-old man was admitted with abdominal pain, nausea and vomiting secondary to ingestion of multiple foreign bodies. He was found to be in increasing distress with an increase in abdominal pain and distention and no passage of foreign bodies. Patient underwent a laparotomy. Foreign bodies removed from perforated distal ileum included 8 big size (10 cm) plastic clothes pegs, a 10 cm pencil, couple of stones, a 10 cm wood nail, nail scissors and a small size battery. In case of foreign body ingestion, especially in mentally-ill patients, the patient should be carefully examined because of the potential risk of obstruction and bowel perforation, more so, if the foreign body is a battery which can puncture causing corrosive injury as well.
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    Dose-related effects of dexamethasone on liver damage due to bile duct ligation in rats
    (Baishideng Publishing Group Inc, 2006) Eken, Halil; Ozturk, Hayrettin; Ozturk, Hulya; Buyukbayram, Huseyin
    AIM: To evaluate the effects of dexamethasone on liver damage in rats with bile duct ligation. METHODS: A total of 40 male Sprague-Dawley rats, weighing 165-205 g, were used in this study. Group 1 (sham-control, n = 10) rats underwent laparotomy alone and the bile duct,was just dissected from the surrounding tissue. Group 2 rats (untreated, n = 10) were subjected to bile duct ligation (BDL) and no drug was applied. Group 3 rats (low-dose dexa, n = 10) received a daily dose of dexamethasone by orogastric tube for 14 d after BDL. Group 4 rats (high-dose dexa, n = 10) received a daily dose of dexamethasone by orogastric tube for 14 d after BDL. At the end of the two-week period, biochemical and histological evaluations were processed. RESULTS: The mean serum bilirubin and liver enzyme levels significantly decreased, and superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) values were significantly increased in low-dose dexa and high-dose dexa groups when compared to the untreated group. The histopathological score was significantly less in the low-close and high-dose dexa groups compared to the untreated rats. In the low-dose dexa group, moderate liver damage was seen, while mild liver damage was observed in the high-dose dexa group. CONCLUSION: Corticosteroids reduced liver damage produced by bile duct obstruction. However, the histopathological score was not significantly lower in the high-dose corticosteroid group as compared to the low-dose group. Thus, low-dose corticosteroid provides a significant reduction of liver damage without increased side effects, while high dose is associated not with lower fibrosis but with increased side effects. (c) 2006 The WJG Press. All rights reserved.
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    Effect of a 50-Hz Sinusoidal Electromagnetic Field on the Integrity of Experimental Colonic Anastomoses Covered with Fibrin Glue
    (Wroclaw Medical Univ, 2009) Girgin, Sadullah; Ozturk, Hayrettin; Gedik, Ercan; Akpolat, Veysi; Kale, Ebru; Ozturk, Hulya
    Background. Low-frequency magnetic fields have been shown to affect biological processes. In this article the effects of 50-Hz sinusoidal magnetic field (MF) stimulation and application of fibrin glue on the healing of experimental colonic anastomoses were investigated. Material and Methods. Twenty-eight rats were divided into four groups. Group 1 underwent 2-cm left colonic resection and primary anastomosis. Group 2 underwent normal resection anastomosis and the area was covered with fibrin glue. Group 3 underwent normal resection anastomosis and the rats were exposed to a 50-Hz sinusoidal MF. Group 4 underwent normal resection anastomosis, the anastomosis area was covered with fibrin glue, and the rats were exposed to a 50-Hz sinusoidal MF. Investigations included bursting pressure measurement, hydroxyproline content, and histopathological changes. Results. Tissue hydroxyproline levels and anastomotic bursting pressures of groups 2, 3, and 4 were significantly higher than in group 1. Collagen deposition and fibroblast infiltration in groups 2, 3, and 4 had higher scores than in group 1. Furthermore, these results were significantly higher in group 4 rats than in the other groups. Histopathological examination of the anastomosis revealed significantly better healing patterns for group 4 than for groups 1, 2, and 3. Conclusions. A50-Hz sinusoidal MF stimulation and application of fibrin glue provided a significant gain in anastomotic healing in the large intestine. A combination of a 50-Hz sinusoidal MF and fibrin glue has significantly favorable effects on healing of experimental colon anastomosis (Adv Clin Exp Med 2009, 18, 1, 13-18).
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    The effect of L-arginine methyl ester on indices of free radical involvement in a rat model of experimental nephrocalcinosis
    (Springer, 2006) Ozturk, Hayrettin; Ozturk, Hulya; Yagmur, Yusuf; Buyukbayram, Huseyin
    The aim of this study was to test the effect of L-arginine methyl ester (L-Arg) on indices of free radical involvement in a rat model of experimental nephrocalcinosis. Twenty-eight Sprague-Dawley rats were randomized into four groups of seven. The first group (Gl), the sham-control group received pure distilled drinking water. The second group (G2) received drinking water containing 0.7% ethylene glycol (EG) in distilled water for 3 weeks. The third group (G3) received drinking water containing 0.7% EG in distilled water for 3 weeks and L-Arg was administered for 3 weeks. The fourth group (G4) received drinking water containing 0.7% EG in distilled water for 3 weeks and L-NAME was administered for 3 weeks. Urine and aortic blood was collected to determine some parameters. The kidneys were also removed for histological examination. The increase in blood urea nitrogen, serum creatinine, K(+), Mg(2+) and uric acid were mild in group 3 compared with the groups 2 and 4. The urinary concentrations of Na(+), K(+), Mg(2+) and uric acid were noticed to be similar among the groups. However, Ca(2+) and oxalate excretion were significantly higher in groups 2, 3 and 4 than in group 1. The mean values of SOD, CAT and GSH-Px values were significantly increased in group 3 when compared to groups 2 and 4. Presence of aggregated urinary crystals was clearer in experimental groups compared to group 1. The tubular dilatation, epithelial degeneration and lymphocytic infiltration were significantly found in groups 2 and 4. Mild tissue damage was observed in L-Arg-pretreated rats. Under polarized light microscope intense crystals in the cortex and medulla were observed in the kidney of group 2 and 4 and moderate crystals were noticed in group 3. In conclusion, L-Arg supplementation may decrease free radicals and tubulary membrane injury in nephrocalcinosis due to infiltrating leukocytes and decreased antioxidant enzyme activities in rats fed with EG diet.
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    Effects of Combined Pulse Electromagnetic Field Stimulation Plus Glutamine on the Healing of Colonic Anastomosis in Rats
    (Springer, 2009) Girgin, Sadullah; Gedik, Ercan; Ozturk, Hayrettin; Akbulut, Veysi; Kale, Ebru; Buyukbayram, Huseyin; Celik, Salih
    Purpose An experimental study was designed to investigate the effect of combined pulse electromagnetic field (PEMF) stimulation plus glutamine administration on colonic anastomosis. Methods Anastomosis of the left colon was performed in 28 rats, which were divided into four groups; Group 1: normal resection anastomosis plus oral 50 mg/kg/day glutamine; Group 2: normal resection anastomosis plus PEMF stimulation plus oral 50 mg/kg/day glutamine; Group 3: normal resection anastomosis plus PEMF stimulation; Group 4: normal resection anastomosis. On the seventh postoperative day, the animals were killed and the bursting pressure and tissue hydroxyproline concentration of the anastomosis were analyzed and compared. Results The mean anastomotic bursting pressure in Group 2 was significantly higher than in Groups 1 and 4. On the other hand, the mean anastomotic bursting pressure in Group 1 was significantly higher than in Group 4. The collagen deposition and the fibroblast infiltration were significantly increased on the seventh day in Group 3 compared the other groups. On the other hand, Groups 1 and 2 had higher scores for collagen deposition and fibroblast infiltration than Group 4. Conclusions In conclusion, burst pressures, hydroxyproline, and histologic features (fibroblast infiltration and collagen deposition) were improved in the PEMF group, and both PEMF and glutamine-enriched nutrition provide a significant gain in the strength of colonic anastomoses in rats.
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    Effects of Combined Pulse Electromagnetic Field Stimulation Plus Glutamine on the Healing of Colonic Anastomosis in Rats (vol 54, pg 745, 2009)
    (Springer, 2010) Girgin, Sadullah; Gedik, Ercan; Ozturk, Hayrettin; Akpolat, Veysi; Kale, Ebru; Buyukbayram, Huseyin; Celik, Salih
    [Abstract Not Available]
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    Effects of dexamethasone on small bowel and kidney oxidative stress and histological alterations in bile duct-ligated rats
    (Springer, 2006) Ozturk, Hayrettin; Eken, Halil; Ozturk, Hulya; Buyukbayram, Huseyin
    Oxidative stress plays an important role in the pathogenesis of toxic liver diseases and other hepatic alterations including obstruction of bile flow. It has been shown that the gastrointestinal tract and renal tissue is particularly affected during obstruction of bile flow. In this study, we aimed to evaluate the effects of dexamethasone on small bowel and kidney oxidative stress and histological alterations in bile duct-ligated (BDL) rats. A total of 40 male Sprague-Dawley rats weighing 200-240 g were used in this study. Group 1 (Sham-control, n = 10) rats underwent laparotomy and bile duct was dissected from the surrounding tissue. Group 2 (Dexa-control, n = 10) rats underwent laparotomy and bile duct was dissected from the surrounding tissue. The rats received daily dexamethasone. Group 3 (BDL/Untreated, n = 10) rats were subjected to bile duct ligation and no drug was applied. Group 4 (BDL/Dexa, n = 10) rats received daily dexamethasone by orogastric tube for 14 days after BDL. At the end of the 2-week period, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), and malondialdehyde (MDA) were measured and biochemical and histological evaluation were processed. The mean serum bilirubin, liver enzymes, MDA level, and histopathological score significantly decreased and SOD, CAT, and GSH-Px values were significantly increased in group 4 when compared to group 3. Group 3 presented a significant increase in caecal count of E. coli and in aerobe/anaerobe ratio. In group 4, liver was moderately damaged. Ileal biopsies from group 4 demonstrated a significant increase in villus height, total mucosal thickness, and villus density when compared to group 3. Glomerular injury scores (GIS) and arterial injury scores (AIS) in group 3 rats were increased in the juxtamedullary region. In contrast to group 4, tubulo-interstitial lesions were diffuse in group 3 animals. Dexamethasone reduced small bowel and kidney oxidative stress and histological alterations in bile duct-ligated rats with increasing SOD, CAT, and GSH-Px and decreasing MDA levels in rats with obstructed bile duct.
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    The effects of molsidomine on hypoxia inducible factor alpha and Sonic hedgehog in testicular ischemia/reperfusion injury in rats
    (Springer, 2009) Dokucu, Ali Ihsan; Ozturk, Hulya; Ozturk, Hayrettin; Tuncer, Mehmet Cudi; Yilmaz, Fahri
    This study was designed to determine the effect of molsidomine (MO), a precursor of nitric oxide (NO) donor, on hypoxia inducible factor alpha (HIF-1 alpha) and Sonic hedgehog (Shh) levels considered to be involved in the development of testes ischemia/reperfusion (I-R) injury. Torsions were created by rotating ipsilateral testes 720A degrees in a clockwise direction for 6 h and 1-h detorsion of the testis was performed. A sham operation was performed in group 1 (control, n = 7). In group 2 (I-R/Untreated, n = 7), following 6 h of unilateral testicular torsion, 1-h detorsion of the testis was performed. No drug was given. In group 3 (I-R/MO), after performing the same surgical procedure as in group 2, a NO donor MO was given at the starting time of reperfusion. In group 4 (I-R/L-NAME), after performing the same surgical procedure as in group 2, L-NAME was given at the starting time of reperfusion. Testes malondialdehyde (MDA) levels were determined as well as examining the testes histologically. Treatment of rats with MO produced a significant reduction in the levels of MDA and histopathological score compared to testes I-R groups. The Sonic hedgehog (Shh) expression in the basement membrane of the tubuli seminiferi, and sertoli and germinal cells in testicular tissue, were greatly increased in the I-R/MO group compared to groups 1, 2 and 4. Additionally, the HIF-1 alpha expression in the interstitial spaces in testicular tissue were greatly increased in the I-R/MO group. The results suggest that MO has a protective effect against ischemia/reperfusion injury in rat testes and may affect Shh and HIF-1 alpha signaling pathway.
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    Effects of specific inhibition of cyclooxygenease-2 on kidney in bilateral adrenalectomized rats
    (Springer, 2007) Ozturk, Hulya; Ozturk, Hayrettin; Gedik, Senol; Uzunlar, Ali Kemal; Ketani, Aydin
    In the kidney, prostaglandins represent important physiological modulators of renal hemodynamics and salt and water homeostasis. In this experimental study of bilaterally adrenalectomized (ADX) rats, we aimed to investigate whether the administration of selective (celecoxib) inhibitor of COX-2 would alter the morphological and functional changes in rat kidney tissue. Twenty-one male Sprague-Dawley rats weighing 225-250 g were used. The animals were divided into three groups. Group 1 rats (Sham-control, n = 7) did not receive any treatment. In group 2 rats (ADX/Untreated, n = 7), bilateral ADX was performed via a single dorsal incision. In group 3 (ADX/COX-2) rats, the same operation was performed as described for group 2 and then the COX-2 inhibitor celecoxib was administered by gavage for a period of 7 days. On the 7th day of the study, renal function was assessed by measurements of blood urea nitrogen (BUN) and serum creatinine levels. Biopsies were obtained from the remaining left kidneys before killing the rats. There was no significant difference in the BUN and creatinine values between the groups. In ADX/Untreated group, capillary congestion in glomerule, inflammation, hemorrhage and congestion in intertubular area, and cytoplasmic vacuolation in renal tubules was observed. Mild damage was observed in the ADX/COX-2 group. The number of macrophages was significantly decreased in ADX/COX-2 group when compared to ADX/Untreated group (P < 0.0001). Our study indicates that celecoxib may be an important factor affecting renal morphological changes after the bilaterally ADX.
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    Exogenous human recombinant interleukin-10 protects the kidney against hypoxia-induced renal injury in immature rats
    (Wiley-Blackwell, 2006) Ozturk, Hayrettin; Onen, Abdurrahman; Ozturk, Hulya; Buyukbayram, Huseyin
    Aim: The purpose of this study was to determine the effects of exogenous human recombinant interleukin-10 (rhIL-10) on hypoxia-induced renal injury in immature rats. Method: The study was performed on 1-day-old Sprague-Dawley rat pups. Group 1 (n = 8) served as non-hypoxic controls. Group 2 (untreated, n = 8) rats were subjected to hypoxia-reoxygenation (H/O) and were then returned to their mothers. Group 3 (rhIL-10 treated, n = 8) rats were subjected to H/O, were returned to their mothers, and were treated with rhIL-10 (75 mu g/kg subcutaneously) for the next 3 days. All animals were killed on day 4 and renal specimens were obtained to determine the tissue level of malondialdehyde (MDA) and histological changes. Results: In the untreated group, moderate or severe renal tubular necrosis was observed However, the tubular necrosis score was significantly less in the rhIL-10 treated rats than in the untreated rats (P < 0.05). In the untreated group, MDA levels were significantly increased compared with the control and rhIL-10 groups (P < 0.001 and P < 0.05, respectively). In the rhIL-10 treated group, MDA levels were not significantly different compared with the control group. Conclusion: RhIL-10 has a protective effect against hypoxia-induced renal injury in immature rats by depression of tissue MDA level and renal tubular necrosis score.
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    Hydatid cysts in children: analysis of 49 cases
    (Aves, 2006) Ozturk, Hlya; Ozturk, Hayrettin; Otcu, Selcuk; Onen, Abdurrahman; Duran, Hatun
    Purpose: In this study, we aimed to analyze the diagnostic and therapeutic features, morbidity and mortality of patients with hydatid disease. Material and methods: 49 children (24 boys and 25 girls) infected by Echinococcus granulosus had surgery for hydatid disease. All patients were evaluated for age, sex, admission time, symptoms at admission, diagnostic techniques, locations of cysts, treatment modalities, morbidity and mortality rate. Ultrasonography, computed tomography, Casoni and Weinberg tests proved the diagnosis. Albendazole treatment was given to 27 of the patients in postoperative period. Results: Mean ages of the patients were 10.5 years. The most common symptom on admission was abdominal pain. The most common localization of the cyst was liver in 33 patients (% 67). Hydatid cysts were treated by conventional open surgery or percutaneous drainage. The form of surgical treatment was capitonnage and total excision of the cyst; and drainage of the cyst cavity in 47 patients (96%). Percutaneous treatment was performed in 2 patients (4%). There were no deaths. Recurrence rate was 4% during the follow-up period of 24 months (range, 8-60 months). Conclusion: Surgical treatment is successful in the hydatic cysts. Additionally, the study confirms the endemic state of the hydatic disease in our region.
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    Iloprost, a prostacyclin (PGI2) analogue, reduces liver injury in hepatic ischemia-reperfusion in rats
    (Acta Cirurgica Brasileira, 2009) Gedik, Ercan; Girgin, Sadullah; Obay, Basra Deniz; Ozturk, Hayrettin; Ozturk, Hulya; Buyukbayram, Huseyin
    Purpose: To evaluate the effects of iloprost a prostacyclin analogue on the hepatic IR injury in rats. Methods: Forty male Sprague-Dawley rats (250-300 g) were divided into four groups each containing 10 rats; -(1) controls: data from unmanipulated animals; (2) sham group: rats subjected to the surgical procedure, except for liver I/R, and given saline; (3) I/R group: rats that underwent liver ischemia for 45 min followed by reperfusion for 45 min; (4) I-R/Iloprost group: rats pretreated with iloprost (10 mu g kg(-1), i.v). Liver tissues were taken to determine SOD, CAT, GSH, and MDA levels and for biochemical and histological evaluation. Results: The plasma ALT and AST levels were increased in group 3 than in group 4. MDA values and the liver injury score decreased, while the SOD, CAT, and GSH values increased in group 4 compared to group 3. In group 3, hepatocytes were swollen with marked vacuolization. In group 4, there were regular sinusoidal structures with normal morphology without any signs of congestion. Conclusion: We demonstrated hepatoprotective effects of iloprost against severe ischemia and reperfusion injury in rat liver.
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    An Infantile Splenic Hemangiopericytoma Case Treated with Partial Splenectomy
    (Taylor & Francis Inc, 2012) Uygun, Ibrahim; Okur, Hanifi; Firat, Ugur; Otcu, Selcuk; Ozturk, Hayrettin
    Splenic hemangiopericytoma is a very rare tumor. So far only 10 patients (9 adults, 1 child) have been reported in the literature and all of them were treated with total splenectomy. Herein, we report the first infant case of the splenic hemangiopericytoma in a 10-month-old girl and the first case that was treated with partial splenectomy for splenic hemangiopericytoma.
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    Interaction of L-Arginine-methyl ester and Sonic hedgehog in liver ischemia-reperfusion injury in the rats
    (Baishideng Publishing Group Inc, 2007) Tuncer, Mehmet Cudi; Ozturk, Hayrettin; Buyukbayram, Huseyin; Ozturk, Hulya
    AIM: To investigate the role of Sonic hedgehog (Shh) on the course of liver ischemia and reperfusion (I/R) in rats, and the interaction between treatment with nitric oxide donor L-Arginine-methyl ester (L-Arg) and up-regulation of Shh expression. METHODS: A total of 30 male Sprague-Dawley rats weighing 220-240 g were used in this study. Shamcontrol group (G1, n = 10): a sham operation was performed (except for liver I/R). I/R-untreated group (G2, n = 10): rats underwent liver ischemia for 1 h followed by reperfusion for 45 min. I/R-L-Arg group (G3, n = 10): after performing the same surgical procedure as in group 2, animals were treated with L-Arg. Liver tissues were taken for determination of malondialdehyde (MDA) levels, and biochemical and histological evaluations were made. RESULTS: Plasma alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH) and gamma-glutamyltranspeptidase (GGT) activities were higher in group 2 than in group 3. MDA values and the hepatic injury score decreased in the L-Arg treated group compared to the I/R-untreated group. In group 2, the hepatocytes were swollen with marked vacuolization. Group 3 rats showed well-preserved liver parenchyma, with hepatocytes extending from the central vein. The morphology of the hepatocytes and the sinusoidal structures was normal, without any signs of congestion. Mild Shh positive immunostaining was detected in group 2 animals. The expression of immunoreactive cells was increased markedly in liver tissue from I/R-L-Arg rats. CONCLUSION: Our findings suggest that Shh molecules are critical factors in the pathophysiology of inflammatory liver injury induced by I/R. In addition, NO plays an important role in the immunohistochemical expression of these molecules. (c) 2007 WJG. All rights reserved.
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    Intestinal Ischemia, Bacterial Translocation, and Oxygen Free-Radical Production in Abdominal Compartment Syndrome
    (Wroclaw Medical Univ, 2009) Yagmur, Yusuf; Ozturk, Hayrettin; Guloglu, Cafer; Geyik, Mehmet Faruk; Ozturk, Hulya; Mete, Fatih
    Objectives. The aim of this experimental study was to evaluate the consequences of increased intra-abdominal pressure on the small bowel and whether this pressure creates intestinal ischemia leading to oxygen free-radical production and bacterial translocation. Material and Methods. Twenty Sprague-Dawley rats weighing 275-300 g were used. Group 1 rats (n = 10) were subjected to 20-mm Hg pneumoperitoneum pressure for 60 minutes. In group 2 rats (n = 10, controls) the intra-abdominal pressure was not increased. In all rats the following parameters were investigated: mean arterial pressure after carotid catheterization, histopathological examination of the intestinal mucosa evaluated with a scoring system, malondialdehyde production in the liver and small bowel, and bacterial translocation towards the mesenteric lymph nodes, liver, and spleen 24 hours after pneumoperitoneum deflation. Results. The mean arterial pressure exhibited no alterations. Histological analysis mainly showed extensive epithelial separations from the lamina propria down the sides of the villi and ulceration at the villus tips in the rats with increased intra-abdominal pressure. Bacterial translocation occurred to the mesenteric lymph nodes, spleen, and liver after 60 minutes of increased intra-abdominal pressure of 20 mm Hg (p < 0.05). Malondialdehyde increased in the liver and small bowel mucosa (p < 0.05 for both). Conclusions. Increased intra-abdominal pressure in rats leads to intestinal ischemia and mild histological changes in the small bowel and to oxygen free-radical production and bacterial translocation (Adv Clin Exp Med 2009, 18, 2, 115-120).
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    Magnetic compression gastrostomy in the rat
    (Springer, 2012) Uygun, Ibrahim; Okur, Mehmet Hanifi; Cimen, Hasan; Keles, Aysenur; Yalcin, Ozben; Ozturk, Hayrettin; Otcu, Selcuk
    Magnetic compression anastomosis is used for gastrointestinal, biliary, and urinary anastomoses. We have developed a simple magnetic compression gastrostomy technique in rats. Animals were randomized into two groups (n = 12 each): magnetic gastrostomy (MG) and surgical gastrostomy (SG) (control). In the MG group, a magnetic insertion catheter was coupled with the first magnetic ball and introduced transorally into the stomach. A second magnetic ball was placed subcutaneously into the left upper quadrant. The two magnetic balls (4 mm) were strongly coupled together. On postoperative day (PD) 20 (MG group) and PD10 (SG group), rats were killed, gastrostomies were evaluated macroscopically and histopathologically, and mechanical burst testing was performed. Two animals died due to suspected leaks. Macroscopic evaluation indicated no gastrostomy canal in one rat in each group. Mild adhesion was observed in two rats in the MG group. Moderate adhesion was observed in all rats in the SG group. No significant differences were observed in burst pressure between the two groups (means: MG group, 143 mmHg, n = 9; SG group, 159 mmHg, n = 8). Magnetic compression gastrostomy can be performed easily in rats, and may be developed in future as a simple alternative to some gastrostomy procedures in humans.