Browsing by Author "Ayhan, S"

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    Mesenteric fibromatosis: A case report
    Ayhan, S; Temiz, P; Kurt, K
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    Evaluation of the relation between interstitial cells of cajal (CD117) and serotonin receptor (5HT-3A) with postfundoplication dysphagia
    Ozcan, CU; Yilmaz, O; Gurer, DE; Ayhan, S; Taneli, C; Genc, A
    Objective: The aim of the present study is to investigate the effect of Nissen fundoplication to the pacemaker cells of an intestinal system and the serotonin receptors on an ICC membrane. Methods: Sixteen adult male rats were taken into study. Rats were divided in to the following two groups. Nissen fundoplication was performed to study group (Group 1) and no surgical procedures were applied to control group (group 2). The rats who were subjected to surgery and the rats without surgery were sacrificed on to postoperative 14 days. Specimens for the pathologic analysis were obtained from upper esophagus (group A) and esophagogastric junction (EGJ) (group B). Distribution of ICC and 5HT-3A were evaluated separately. Results: There was a significant difference (p = 0.01, p = 0.02, respectively) regarding number of cells stained with CD117 between the group 1B-2B and group 2A-2B. Also there was a significant difference between (p = 0.01, p = 0.01 respectively) number of cells stained with 5HT-3A in groups 1A-1B and 2A-2B. However, no correlation was detected between group 1B-2B for 5HT-3A. Conclusion: A reduction in the number of ICC was observed in esophagogastric junctions of the fundoplication group but 5HT-3A distribution did not show a significant difference. A decrease in the number of ICC may be effective at postfundoplication dysphagia. (C) 2014 Surgical Associates Ltd. Published by Elsevier Ltd. All rights reserved.
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    Retrospective Evaluation of Cases Diagnosed with Ulcerative Colitis
    Ünal, F; Sahin, G; Cebe, A; Ayhan, S; Eren, F; Kasirga, E
    Introduction: Inflammatory bowel disease (IBD) is a chronic inflammatory disease of the gastrointestinal canal characterised by remissions and exacerbations. This study aimed to make a retrospective evaluation of clinical and laboratory findings of patients being monitored with a diagnosis of IBD. Materials and Methods: Medical records of 18 patients with a diagnosis of IBD and 7 years of follow-up at our pediatric gastroenterology departments were investigated with respect to demographic data, complaints on presentation and accompanying diseases. Unusual findings from physical examination, endoscopic findings, histopathological findings and the applied treatments were examined. Results: The 18 patients (10 female, 8 male) included in this study had a mean age of 13.6 +/- 2.9 years and the mean time from onset of symptoms to diagnosis was 6.9 +/- 4.5 months. Seventeen patients were diagnosed with ulcerative colitis and 1 patient with intermediate colitis. There was a positive family history of the disease in 2 patients (11%). At the time of diagnosis, the most common complaints on presentation were found to be abdominal pain (100%), bloody diarrhea (94.5%) and tenesmus (44.4%). The most frequent laboratory findings were CRP positivity (89%), increased sedimentation rate (83.3%) and iron-deficient anaemia (77.7%). On colonoscopy, pancolitis involvement (66.6%) was most frequently encountered. Accompanying diseases to IBD were found to be familial Mediterranean fever (FMF) (11%), celiac disease (5.5%) and Heliobacter pylori gastritis (5.5%). One patient (5.5%) who did not respond to medical treatment for pancolitis involvement underwent a colectomy. Discussion: The number of diagnoses of IBD in childhood is gradually increasing. Nonetheless, it can be difficult to define diseases with non-specific symptoms and this may cause a delay in diagnosis. Because of the association of autoimmune diseases with IBD, despite appropriate therapy, diseases with no remission which lead to gastrointestinal inflammation, such as FMF, should be further investigated.
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    Midede Dev Hiperplastik Polip
    Duman, FU; Ayhan, S; Isisag, A; Yaman, I
    Hyperplastic polyps, which account for nearly 75% of all gastric polyps, are generally small (< 1 cm), single, sessile, polyps and located in antrum. They are usually asymptomatic. A 77-year-old man was admitted to hospital due to severe fatigue as a consequence of iron-deficiency anemia. The upper gastrointestinal endoscopy which was done to discover an etiological factor revealed a papillomatous mass 6 cm in diameter that had a malignant endoscopic appearance. Numerous macroscopic sections were taken since larger gastric polyps (especially those greater than 2 cm in diameter) have a greater risk of malignancy development. No dysplasia was detected on histological and immunohistochemical evaluation and it was therefore diagnosed as a giant hyperplastic polyp in the stomach. The large size of the polyp in the presented case led us to emphasize the importance of searching for dysplasia in such cases.
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    Col IV and Fn distribution in prostatic adenocarcinoma and correlation of 67LR, MMP-9 and TIMP-1 expression with Gleason score
    Isisag, A; Nese, N; Ermete, M; Lekili, M; Ayhan, S; Kandiloglu, AR
    OBJECTIVE: To assess the immunoreactivity of 5 proteins related to basement membrane (BM) and extracellular matrix in order to investigate whether any of them correlates with differentiation of prostatic adenocarcinoma (PAc). Two of these markers are collagen type IV (Col IV), the collagenous component of basement membrane, andfibronectin (Fn), an adhesion protein in extracellular matrix. Others are matrix metalloproteinase-9 (MMP9), a type IV collagenase, tissue inhibitor of matrix metalloproteinase-1 (TIMP-1), which has a high affinity for A4MP-9, and 67-kd laminin receptor (67LR), which belongs to the non-integrin laminin binding receptor family. STUDY DESIGN: Forty-three PAc cases with Gleason scores ranging between 5 and 10 and 10 benign prostatic hyperplasia (BPH) cases, the control group, were included in the study. Formalin-fixed and paraffin-embedded tissue slides from each case were immunostained with the avidin-biotin-peroxidase method. Immunoreactivity was determined by means of a scoring system similar to the Gleason scoring system. RESULTS: Overexpression of Col IV, Fn, 67LR and MMP-9 was detected in PAc as compared with BPH, whereas no difference was determined in TIMP-1 expression. Among these, only 67LR correlated statistically with Gleason score. CONCLUSION: Expression of 67LR in tumor cells was significantly increased in parallel to tumor grade. This may be useful in microscopic evaluation of PAc.
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    Musinous cystic neoplasia mimicking hydatid cyst in the liver: Two rare cases
    Tekin, E; Taskin, T; Ayhan, S
    Mucinous cystic neoplasm of the liver (MCN-L) is a rare tumor which accounts for less than 5% of all liver cysts. Although they are considered to be benign cysts radiologically and clinically because of their slow growth, they are considered as premalignant. We present two radiologically misdiagnosed cases that operated in a short time range, in order to increase awareness for these rare tumors. A 47-year-old female patient who had no active complaints 58 x 40 mm cystic lesion was detected in the liver, which was diagnosed hydatid cyst radiologically. The pathological examination showed multiloculated cysts which was covered by low-grade mucinous epithelium and ovarian-type stroma on the cyst wall. A 50-year-old female patient presented with abdominal distention. The radiographical screening revealed a 204 x 140 mm cystic lesion that completely fills left lobe of liver which interpreted in favor of hydatid cyst. Histopathologically, the inner surface of the cyst was covered with low grade mucinous epithelium. Ovarian-type stroma was detectable only by immunohistochemistry due to significant bleeding and edema on the wall. The diagnosis of both of our cases was low grade MCN-L. Since cysts were not intact at the time of gross examination, we could not make any comment about surgical margins or total excision. MCN-L is a tumor that creates difficulty in presurgical differential diagnosis because of its rarity and lack of specific radiologic features. Although the prognosis is excellent as a result of total excision in the benign group, relapses have also been reported.
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    Long-term outcomes of thymosin-α1 and interferon α-2b combination therapy in patients with hepatitis B e antigen (HBeAg) negative chronic hepatitis B
    Saruc, M; Ozden, N; Turkel, N; Ayhan, S; Hock, LM; Tuzcuoglu, I; Yuceyar, H
    Hepatitis B e antibody (HbeAb) and hepatitis B virus (HBV) DNA positive chronic hepatitis is a clinical entity, distinct from classical hepatitis B e antigen (HbeAg) positive chronic hepatitis B. Our aim was to evaluate the long-term therapeutic efficacy of the combination of interferon alpha-2b and thymosin-alpha1 compared with lamivudine plus interferon alpha-2b and interferon alpha-2b alone. Fifty-two patients with HbeAg-negative chronic hepatitis B were assigned to three different groups in a nonrandomized manner. Group 1 (n = 27) received thymosin-alpha1 [1.6 mg subcutaneously (sc), twice a week] and interferon alpha-2b (10 MIU sc, three times per week) for 26 weeks, subsequently followed by interferon alpha-2b monotherapy at the same dosage for an additional 26 weeks. Group 2 (n = 10) received interferon alpha-2b (10 MIU sc, three times per week) for 52 weeks. Group 3 (n = 15) received interferon a-2b (10 MIU sc, three times per week) and lamivudine [100 mg orally (po), q.d.] for, 62 weeks, followed by continuous lamivudine (100 mg po, q.d.) therapy. By the end of 78 weeks, a sustained response (SR-6 mo) was seen in 74% (20/27) of the patients within Group 1. On the contrary, Groups 2 and 3 had sustained response rates of 40 (4/10) and 53.3% (8/15), respectively (p = 0.13). At the end of 12 months post-treatment in Group 1, a virological and biochemical response rate was seen in 70.3% of patients (19/27); in contrast, Groups 2 and 3 had response rates of 20 (2/10) and 26.6% (4/15), respectively (p = 0036). At the end of the 18-month post-treatment follow-up period, 71.4% (19/27) of patients in Group 1, 10% of patients in Group 2 (1/10), and 20% of patients in Group 3(3/15) preserved their sustained response (p = 0.0003). Interferon alpha-2b and thymosin-alpha1 combination therapy results in significant virological and biochemical response rates compared with standard therapeutic regimens and is well tolerated.
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    Correlation Among Standard Endoscopy, Narrow Band Imaging, and Histopathological Findings in the Diagnosis of Nonerosive Reflux Disease
    Kasap, E; Zeybel, M; Asik, G; Ayhan, S; Yüceyar, H
    Background and Aims: Gastroesophageal reflux disease (GERD) is caused by the reflux of gastric contents into the esophagus. Narrow band imaging (NBI) facilitates mucosal surface evaluation and may improve the endoscopic diagnosis of GERD. The diagnosis of GERD is based on the combination of clinical symptoms, endoscopic findings, and histological changes. In this study we aimed to show the differences between standard white light endoscopy and the NBI technique in squamo-columnar junction evaluation. We also evaluated the patients with NERD, as determined by standard white light endoscopy, using the NBI technique and histopathological mucosa examination (inflammation or normal mucosa). Methods: A total of 60 subjects were recruited prospectively: 40 with nonerosive reflux disease (NERD) and 20 with erosive reflux disease (ERD). Patients were subjected to esophagogastroduodenoscopy and, in all of them, two biopsies were taken 2 cm above the esophagogastric junction. Results: NBI was more sensitive than standard white light endoscopy in distinguishing normal endoscopic findings. Histopathological findings were more prevalent than the mucosal changes diagnosed by the standard white light endoscopy and NBI. Conclusion: NBI is more sensitive than white light endoscopy in detecting inflammation in NERD patients. However, histopathological evaluation is the most sensitive, therefore taking a biopsy will remain useful.
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    Soft tissue osteoma: A case report
    Temiz, P; Bastürk, O; Ayhan, S; Yilmaz Ovali, G; Okçu, G
    Soft tissue osteomas are very rare and should be differentiate from other osseous lesions of soft tissue. We present two patients and discuss their clinical, radiologic and histopathological features with literatures. The first patient was 17-year-old boy, amateur football player. The other was a 43-year-old man had a firm, painless mass at his right knee. Their medical history had both trauma to their knees. Radiologically, heterogenous nodular calcification areas were observed near the proximal metaphysis of their tibias. Hardly lobulated lesions without bone attachment at the ligaments were excised. These lesions were gray-white coloured, well-circumscribed, firm masses. Microscopically, welldefined, lobulated lesions were involved mature lamellar bone trabeculae and enchondral ossification areas at peripherial portion. Both of our patients are survived healty for four years.
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    The Role of pRB, p16 and Cyclin D1 in Colonic Carcinogenesis
    Ayhan, S; Isisag, A; Saruc, M; Nese, N; Demir, MA; Kucukmetin, NT
    Background/ Aims: This study is aimed to investigate abnormal expression of the Rb protein (pRb), p16(INK4n) (p16) and cyclin D1 in colorectal adenomas and adenocarcinomas and to assess the possible alterations in Rb pathway in colorectal carcinogenesis. METHODOLOGY: 44 cases of colorectal adenoma and 44 cases of colorectal adenocarcinoma were examined histopathologically and immunohistochemically using monoclonal antibodies to identify abnormalities of pRb, p16, and cyclin D1 expression. Staining degree of above-mentioned markers was assessed by using a semi-quantitative method in all cases in order to determine any staining differences. RESULTS: In 70.5% of the adenomas and 97.7% of the adenocarcinomas, an overexpression of pRb was found. There was a statistically significant relationship between the immunoreactivity of pRb and villous/ tubulovillous types of adenomas (p<0.05). There was a loss of p16 expression in 84.1% of adenomas and 61.4% of adenocarcinomas. Statistically significantly, the p16 overexpression was not seen in any of tubular adenomas (p<0.001). Overexpression of cyclin D1 was found in only 9.1% of adenomas, while 31.8% of adenocarcinomas overexpressed this protein. Loss of expression of cyclin D1 was similar in adenomas and adenocarcinomas (27.3% and 25%, respectively). Staining degrees of all three cell cycle proteins were shown to be statistically different in adenomas and adenocarcinomas, for pRb (p=0.001), for p16 (p=0.045), and cyclin D1 (p=0.05). Also, there was only a mild agreement with respect to p16 and cyclin D1 relationship between for adenomas (k=+0,28 p=0,051) and for adenocarcinomas (k=+0,35 p=0,017). Besides, there was no correlation between the expression of pRb, p16, and cyclin D1 and clinicopathological tumor characteristics and prognostic data such as stage or lymph node/liver metastasis. CONCLUSIONS: pRb, p16 and cyclin D1 are shown to be aberrantly expressed in both colorectal adenomas and adenocarcinomas. It can be claimed that disturbances in Rb pathway take part in colonic carcinogenesis and pRb, p16 and cyclin D1 play an ever increasing role in the further stages of adenoma-carcinoma sequence.
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    Immunohistochemical analysis of Ki-67, p53 and Bcl-2 expression related to histological features in gastroesophageal reflux disease
    Ayhan, S; Nalbant, OA; Isisag, A; Küçükmentin, NT; Temiz, P
    Background/aims: The endoscopic and histologic findings of gastroesophageal reflux disease are usually indistinct. The current study was designed to define accurately the histology in gastroesophageal reflux disease and to develop a hypothesis that reflux produces immunohistochemical changes. Methods: The study was based on the examination of endoscopic esophageal biopsy specimens obtained from 20 patients with evidence of reflux with 24-hour pH-meter monitoring and from 20 control subjects without clinical or endoscopic reflux. The pathogenesis of reflux esophagitis was discussed by comparing the histopathologic changes with determined Ki-67, p53 and Bcl-2 immunoreactivity. Results: In this study, the presence of esophagitis was determined endoscopically in only 55% of the patients with gastroesophageal reflux disease, while microscopic esophagitis was detected in 60% of them. No correlation was found between presence of endoscopic esophagitis and microscopic esophagitis in the patients with gastroesophageal reflux disease. There was a significant difference between control cases and the patients according to histological parameters, which included basal activity (p=0.006), height of papillae (p=0.006), intraepithelial neutrophils (p=0.000), intraepithelial eosinophils (p=0.006), congestion (p=0.001), and dilated intercellular spaces (p=0.006). Immunohistochemically, there was a significant difference in the expression of p53 and Ki-67 between the three study groups (patients with I without microscopic esophagitis, controls) (p<0.05). However, there was no difference in Bcl-2 between the patients with reflux and control cases. Conclusions: In this study, we considered that microscopic esophagitis does not always accompany reflux, and the lack of reliable diagnostic histologic criteria is still a serious problem for pathologists. Immunohistochemically, an increase in cell proliferative activity and p53 protein accumulation to repair oxidative DNA damage related to reflux were observed. However, the close Bcl-2 immunoreactivity in all groups that was indicated by a weak positivity suggests that the inhibition of apoptosis may not be involved in reflux esophagitis.
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    The Association of the Epidermal Growth Factor Receptor (EGFR) Immunoexpression With Prognostic Parameters in Adenocarcinoma Patients Receiving Neoadjuvant Treatment
    Demir, D; Parvizi, M; Pehlivanoglu, B; Ergin, E; Ayhan, S; Doganavsargil, B
    The epidermal growth factor receptor (EGFR) expression is considered to play an essential role in the pathogenesis of colorectal adenocarcinoma. This study assessed the expression and predictive/prognostic value of EGFR expression in pre -op biopsy and post -op resection specimens in patients receiving neoadjuvant radiotherapy/neoadjuvant chemoradiotherapy (NRT/NCRT). Thirty-four consecutive patients were included in this study. The association between the prognostic features and EGFR immunohistochemical expression was analyzed in pre- (n=34) and post -treatment (n=22) tissue samples in cases with available tissue blocks. Of 34, 23 (67.6%) were men. The median age was 60.50 +/- 10.69 (range, 31-84) years. EGFR expression was detected in 88.2% of biopsy specimens and in 91.2% of surgical specimens. There was only slight agreement between pre -op and post -op EGFR expression scores (kappa value 0.11). There was no significant correlation between pre -op and post -op EGFR expression scores (p>0.05). Although pre -op EGFR positivity and higher pre -op EGFR scores seemed to indicate a worse prognosis, this association between pre -op EGFR expression and overall survival (OS) or disease -specific survival (DSS) did not reach statistical significance (p>0.05). The only case with a post -op EGFR score of three who died of the disease experienced local recurrence and had distant metastasis. In conclusion, EGFR positivity in pre -op biopsy samples seems to be associated with shorter survival, and increased EGFR expression in post -treatment resection specimens predicts aggressive behavior in patients with rectal adenocarcinoma who received NRT/NCRT. However, due to the molecular heterogeneity, EGFR expression status should be evaluated in resection specimens rather than in pre -op biopsy samples for optimal prognosis prediction.
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    Olive Leaf Extract Improves the Atherogenic Lipid Profile in Rats Fed a High Cholesterol Diet
    Olmez, E; Vural, K; Gok, S; Ozturk, Z; Kayalar, H; Ayhan, S; Var, A
    Coronary heart disease because of atherosclerosis is still the most common cause of mortality. Elevated levels of low-density lipoprotein and total cholesterol are major risk factors for atherosclerotic cardiovascular disease. The aim of this study was to evaluate the effects of the olive leaf extract on serum lipid profile, early changes of atherosclerosis and endothelium-dependent relaxations in cholesterol-fed rats. For this purpose, rats were fed by 2% cholesterol-enriched or standard chow for 8weeks. Some rats in each group were also fed orally by olive leaf extract at doses of 50 or 100mg/kg/day. Atorvastatin at dose of 20mg/kg of body weight daily was also given as positive control. After 8weeks, lipid profiles of rat serums were analyzed. Antioxidant enzyme activities (superoxide dismutase and glutathione peroxidase) and degree of lipid peroxidation (malondialdehyde levels) were also measured in the hearts isolated from rats. In addition, expression of adhesion molecules and endothelium-dependent relaxations of isolated thoracic aortas of rats were evaluated. Total cholesterol and LDL-cholesterol levels were found to be increased in cholesterol-fed rats, and both doses of olive leaf extract and atorvastatin significantly decreased those levels. In conclusion, because the olive leaf extract attenuates the increased cholesterol levels, it may have beneficial effects on atherosclerosis. Copyright (c) 2015 John Wiley & Sons, Ltd.
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    Gamma scintigraphy and biodistribution of 99mTc-cefotaxime sodium in preclinical models of bacterial infection and sterile inflammation
    Ilem-Ozdemir, D; Asikoglu, M; Ozkilic, H; Yilmaz, F; Hosgor-Limoncu, M; Ayhan, S
    Tc-99m-cefotaxime sodium (Tc-99m-CEF) was developed and standardized under varying conditions of reducing and antioxidant agent concentration, pH, radioactivity dose, and reducing agent type. Labeling studies were performed by changing the selected parameters one by one, and optimum labeling conditions were determined. After observing the conditions for maximum labeling efficiency and stability, lyophilized freeze dry kits were prepared accordingly. Simple method for radiolabeling of CEF with Tc-99m has been developed and standardized. Labeling efficiency of Tc-99m-CEF was assessed by both radio thin-layer chromatography and radio high-performance liquid chromatography and found higher than 90%. The labeled compound was found to be stable in saline and human serum up to 24h. Two different freeze dry kits were developed and evaluated. Based on the data obtained from this study, both products were stable for 6months with high labeling efficiency. The prepared cold kit was found sterile and pyrogen free. The bacterial infection and sterile inflammation imaging capacity of Tc-99m-CEF was evaluated. Based on the in vivo studies, Tc-99m-CEF has higher uptake in infected and inflamed thigh muscle than healthy thigh muscle.
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    99mTc-Doxycycline hyclate: a new radiolabeled antibiotic for bacterial infection imaging
    Ilem-Özdemir, D; Asikoglu, M; Ozkilic, H; Yilmaz, F; Hosgor-Limoncu, M; Ayhan, S
    Radiolabeled antibiotics are promising radiopharmaceuticals for the precise diagnosis and detection of infectious lesions. Doxycycline Hyclate (DOX) was chosen to investigate new Tc-99m-labeled antibacterial agent. Ready to use freeze dry kits were formulated with optimum labeling conditions. Human serum stability, sterility, and pyrogenicity of kits were estimated, and gamma scintigraphy, in vivo biodistribution, and histopathological studies with bacterial infected rats were performed. DOX were successfully labeled by Tc-99m with high radiochemical purity, and the labeled compound was stable in human serum. Kits were sterile, pyrogen-free, and stable up to 6months. Static images depicted rapid distribution throughout the body and high uptake in bacterial infected thigh muscle. The uptake ratios of radiopharmaceuticals in infected thigh muscle were found above 2 up to 5h. Five hours after injection, the rats were sacrificed, and biodistribution was determined. Samples of bacterial infected muscle, healthy muscle, blood, liver, spleen, lung, kidney, stomach, intestine, urine and heart were weighed, and the radioactivity was measured by using a gamma counter. The %ID/g of Tc-99m-DOX was found 0.230.06 for infected thigh muscle. According to the imaging, biodistribution, and histopathological studies, the promising characteristics of Tc-99m-DOX make the new radiopharmaceutical valuable to examine for future studies. Copyright (c) 2013 John Wiley & Sons, Ltd.
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    The role of heme in hemolysis-induced acute pancreatitis
    Saruç, M; Yuceyar, H; Turkel, N; Ozutemiz, O; Tuzcuoglu, I; Ayhan, S; Yuce, G; Coker, I; Huseyinov, A
    Background: The aim was to reveal the mechanism of hemolysis-induced acute pancreatitis and to evaluate the role of heme and heme oxygenase activity in inducing pancreatic inflammation in an experimental hemolysis model. Material/Methods: Hemolytic anemia was induced in rats by intraperitoneal injection of 60 mg/kg acetylphenylhydrazine (APH). To evaluate the toxic effect of free heme after hemolysis, heme oxygenase inhibitor (HOI) was used to inhibit the enzyme which decreases the free heme concentration after hemolysis. One hundred and fifty rats were divided into two treatment and three control groups. Rats in the hemolysis group were given APH intraperitoneally. Rats in the HOI+hemolysis group were given Cr(III)mesoporphyrin IX chloride as HOI and then APH intraperitoneally. Serum amylase and lipase levels as well as pancreatic tissue cytokine content were determined and histological examination performed. Results: No hemolysis or pancreatitis was seen in the control groups. Massive hemolysis was seen in 22 of the 30 rats of the hemolysis group and 20 of the 30 rats of the HOI+hemolysis group. The total pancreatitis rates were 60% and 76.6% in the hemolysis and HOI+hemolysis groups, respectively (p<0.05). Pancreatic cytokine levels were significantly higher in the HOI+hemolysis and hemolysis groups than in all control groups. The highest ICAM-1 and MCP-1 levels were in the HOI+hemolysis group. Histological signs of acute pancreatitis were also more severe in this group. Conclusions: Acute massive hemolysis can induce acute pancreatitis. Excess of free vascular heme seems to be an inducer of inflammation by modulating ICAM-1 and MCP-1.
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    Is Melatonin Protective in Contrast Material Related Renal Failure?
    Tuncyurek, O; Gunay, O; Taneli, F; Ayhan, S; Nese, N; Pabuscu, Y
    Aim: The aim of the study was to investigate the effect of melatonin on the renal injury resulting from radiocontrast media and myoglobinuria in male Wistar albino rats. Material and Method: 50% glycerol at equal amounts was intramuscularly administered to both hind legs of all animals under ether anesthesia at the dose of 10 mg/kg. Three hours later, the groups were administered the following: Group I (number: 7): Iopromide(Ultravist -300 (R)) at the dose of 2 ml/kg (intracardiac); Group II (number: 7): Iopromide(Ultravist -300 (R)) and intraperitoneally administered Melatonin at the dose of 10 mg/kg (Melatonin was dissolved in 7.5% absolute ethanol and further dilutions were made in saline.); and Group III (number: 7): 2 ml/kg of sterile physiologic saline (Control group). The levels of Uurea, Ccreatinine and Ccystatin C were studied on the blood samples collected. The renal samples were evaluated by 2two distinct pathologists who did not know the protocol. Results: There was no difference in the values of Creatinine and cystatin c between Groups 2 and 3 (p=0.9; 0.2). Discussion: In conclusion, we evaluated the possible prevention of contrast-induced oxidative stress in the kidney with using melatonin. However, additional clinical studies are needed to evaluate the role of preventive melatonin treatment in humans.
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    Functional dyspepsia
    Saruc, M; Ozden, N; Turkel, N; Ayhan, S; Demir, MA; Tuzcuoglu, I; Akarca, US; Yuceyar, H
    The etiology of functional dyspepsia is not known. The objective of the present study was to determine the characteristics of functional dyspepsia in Western Turkey. We divided 900 patients with functional dyspepsia into three subgroups according to symptoms: ulcer-like (UL), 321 (35.6%), motility disorder-like (ML), 281 (31.2%), and the combination (C) of these symptoms, 298 (33.1%). All patients were submitted to endoscopic evaluation, with two biopsies taken from the cardia and corpus, and four from the antrum of the stomach. All biopsy samples were studied for Helicobacter pylori (Hp) density, chronic inflammation, activity, intestinal metaplasia, atrophy, and the presence of lymphoid aggregates by histological examination. One antral biopsy was used for the rapid urease test. Tissue cagA status was determined by PCR from an antral biopsy specimen by a random sampling method. We also determined the serum levels of tumor necrosis factor-alpha (TNF-alpha) and gastrin by the same method. Data were analyzed statistically by the Kolmogorov-Smimov test and by analysis of variance. Hp and cagA positivity was significantly higher in the UL subgroup than in the others. The patients in the ML subgroup had the lowest Hp and cagA positivity and Hp density. The ML subgroup also showed the lowest level of Hp-induced inflammation among all subgroups. The serum levels of TNF-alpha and gastrin did not reveal any difference between groups. Our findings show a poor association of Hp with the ML subgroup of functional dyspepsia, but a stronger association with the UL and C subgroups.