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Dive into the research topics where Ayhan Coskun is active.

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Featured researches published by Ayhan Coskun.


Hypertension in Pregnancy | 2009

Association of Maternal Serum CRP, IL-6, TNF-α, Homocysteine, Folic Acid and Vitamin B12 Levels with the Severity of Preeclampsia and Fetal Birth Weight

Melih A. Guven; Ayhan Coskun; Ibrahim Egemen Ertas; Murat Aral; Beyazıt Zencirci; Hafize Öksüz

Objective: To assess the levels and clinical significance of high sensitive(hs)-CRP (C‐reactive protein), IL-6(interleukin-6), TNF-α(tumor necrosis factor-α), homocysteine, folic acid and vitamin B12 in normotensive healthy pregnant women, mild and severe preeclamptic patients, and to evaluate the correlations between these markers and the severity of preeclampsia and fetal birth weight. Study design: Using a cross-sectional study design, hs-CRP, IL-6, TNF-α, homocysteine and vitamin B12 were measured in the third trimester of pregnancy from normotensive healthy women with uncomplicated pregnancies (n = 62), mild (n = 61) and severe (n = 60) preeclamptic patients. Results: There were statistically significant differences between three groups for hs-CRP (p = 0.012), TNF- α (p = 0.046), IL-6 (p = 0.015), homocysteine (p < 0.001) and fetal birth weight (p < 0.001). Fetal birth weights in mild (2477 ± 746) and severe (2435 ± 768) preeclamptic patients were significantly lower than controls (3485 ± 365) (p < 0.001). No significant difference was found between the three groups for folic acid (p = 0.066) and vitamin B12 (p = 0.286). Bonferroni adjusted multiple comparison test showed that the statistical differences with respect to TNF-α, IL-6 and homocysteine were mainly created by control and severe preeclampsia groups. Hs-CRP levels still remained higher in severe preeclampsia patients than mild preeclampsia and normotensive patients except for overweight patients in the previous two groups after Bonferroni post hoc adjustment test. Conclusion: Elevated maternal serum levels of hs-CRP, TNF- α, IL-6 and homocysteine in preeclamptic women correlate with fetal birth weight in the early third trimester.


Journal of Pediatric Surgery | 2010

Protective effect of tadalafil on ischemia/reperfusion injury of rat ovary.

Deniz Cemgil Arikan; Vedat Bakan; Ergul Belge Kurutas; Hamide Sayar; Ayhan Coskun

BACKGROUND/PURPOSE The aim of the study was to evaluate the effects of tadalafil (TDF) on ischemia/reperfusion (I/R) injury in rat ovaries. METHODS Thirty-five female Sprague-Dawley rats were randomly divided into 5 groups (n = 7): sham (S), I/R1, I/R2, TDF1, and TDF2. In the I/R1 and TDF1 groups, 3-hour ischemia was followed by 12-hour reperfusion; and in the I/R2 and TDF2 groups, 3-hour ischemia was followed by 24-hour reperfusion. In the TDF groups, 30 minutes before reperfusion, a single dose of 5 mg/kg TDF was administered intraperitoneally. The ovarian tissue levels of malondialdehyde and nitric oxide (NO), and the activities of superoxide dismutase and catalase were measured biochemically. Tissue damage to ovarian tissue was scored by histopathologic examination. RESULTS The tissue malondialdehyde levels were significantly higher and the catalase and superoxide dismutase activities were significantly lower in the I/R groups compared with the S and TDF groups (P < .05). The NO levels were significantly higher in the TDF1 group than the S and I/R1 groups (P < .05). Although the NO levels were increased in the TDF2 group compared with the I/R2 group, the difference was not significant. Ovarian tissue damage scores of the I/R groups were significantly higher than those of the S group (P < .05). Treatment with TDF significantly decreased the ovarian tissue damage scores in the TDF groups compared with the I/R groups (P < .05). CONCLUSIONS Tadalafil is effective in preventing tissue damage induced by I/R in rat ovaries.


Journal of Maternal-fetal & Neonatal Medicine | 2012

Plasma IL-4, IL-8, IL-12, interferon-γ and CRP levels in pregnant women with preeclampsia, and their relation with severity of disease and fetal birth weight

Deniz Cemgil Arikan; Murat Aral; Ayhan Coskun; Ali Ozer

Objective: The aim of the present study was to evaluate the hypothesis that preeclampsia is associated with increased systemic inflammatory responses of Th1-type as well as decreased Th2-type responses compared with normal pregnancy. We also sought to determine whether there was a correlation between these markers with severity of preeclampsia and fetal birth weight. Methods: The study population consisted of maternal age, gestational age, and body mass index matched 138 pregnant women; 56 normotensive healthy pregnant women (group 1), 42 women with mild preeclampsia (group 2), 40 women with severe preeclampsia (group 3). Results: Plasma interleukin (IL)-8 and C-reactive protein (CRP) levels were significantly higher in group 3 than group 1 (p < 0.05). Plasma IL-4, IL-12, and interferon (IFN)-γ levels were similar in all groups. Although plasma IL-8 and CRP levels of mild preeclamptic group were higher than control group and lower than severe preeclamptic group, the differences were not statistically significant. There was a positive correlation between IL-12 and fetal birth weight in severe preeclamptic group (p < 0.05). Conclusions: Elevated maternal serum pro-inflammatory cytokine IL-8 and CRP in severe preeclamptic women compared with normal pregnant women supports the hypothesis that preeclampsia is associated with increased inflammatory responses.


Journal of Pediatric Surgery | 2012

Selenium has a protective effect on ischemia/reperfusion injury in a rat ovary model: biochemical and histopathologic evaluation ☆

Selim Bozkurt; Deniz Cemgil Arikan; Ergul Belge Kurutas; Hamide Sayar; Mehmet Okumus; Ayhan Coskun; Vedat Bakan

BACKGROUND/PURPOSE The aim of the study was to evaluate the effects of selenium (Se) on ischemia/reperfusion (I/R) injury in rat ovaries. METHODS Thirty-five female Sprague-Dawley rats were randomly divided into 5 groups (n = 7): sham (S), I/R1, I/R2, Se1, and Se2. In the I/R1 and Se1 groups, 4 hours of ischemia was followed by 6 hours of reperfusion, and in the I/R2 and Se2 groups, 4 hours of ischemia was followed by 12 hours of reperfusion. In the Se groups, 30 minutes before reperfusion, a single dose of 0.2 mg/kg Se was administered intraperitoneally. The ovarian tissue levels of malondialdehyde (MDA) and nitric oxide (NO), and the activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) were measured biochemically. Tissue damage to ovarian tissue was scored by histopathologic examination. RESULTS The I/R groups had significantly higher MDA levels and lower CAT, SOD, and GPx activities than the sham group (P < .05). Although NO levels were significantly higher in the I/R1 group than in the sham group (P < .05), the NO levels in the I/R2 and sham groups were similar. Selenium pretreatment significantly lowered tissue MDA and NO levels and increased tissue SOD and GPx activities in the Se groups, compared with those in the I/R groups (P < .05). Catalase activities were significantly higher in the Se2 group than in the I/R2 group (P < .05). Catalase activities were higher in the Se1 group than in the I/R1 group, but the difference was not statistically significant. Treatment with Se significantly decreased the ovarian tissue damage scores in the Se2 group compared with those in the I/R2 group (P < .05). CONCLUSION Selenium is effective in preventing tissue damage induced by I/R in rat ovaries.


Journal of Trace Elements in Medicine and Biology | 2010

Serum reference levels of selenium, zinc and copper in healthy pregnant women at a prenatal screening program in southeastern mediterranean region of Turkey

Metin Kilinc; Ayhan Coskun; Fidan Bilge; Secil Simsek Imrek; Yalcin Atli

PROJECT The aim of the study was to investigate the serum reference range for Selenium (Se), Zinc (Zn) and Copper (Cu) levels in women of 10-14 (group I) and 16-20 (group II) weeks of gestation and compare them with those in non-pregnant healthy women and healthy men. PROCEDURE This cross-sectional study was performed in 351 pregnant women [group I (n: 177) and group II (n: 174)], 30 non-pregnant women and 30 men as controls. The levels of Se, Zn and Cu levels were determined on flame and furnace atomic absorption spectrophotometer using Zeeman background correction. RESULTS In the 10-14 weeks of gestation Se, Zn and Cu serum levels were 44.85+/-9.23, 81.30+/-31.94 and 132.33+/-38.24 microg/dl, in 16-20 weeks of gestation were 47.18+/-10.92, 74.25+/-22.47 and 164.86+/-39.69 microg/dl, in non-pregnant women were 55.38+/-8.81, 121.41+/-29.22 and 104.75+/-39.14 microg/dl also in men 72.24+/-9.28, 134.85+/-15.95 and 78.29+/-20.90 microg/dl, respectively. CONCLUSION A significant low level of serum Se, Zn and a high level of Cu in the pregnant women in the 10-14 and 16-20 weeks of gestation were detected when compared with that of non-pregnant women and men.


European Journal of Obstetrics & Gynecology and Reproductive Biology | 2013

Plasma selenium levels in Turkish women with polycystic ovary syndrome

Ayhan Coskun; Tugba Atilan Arikan; Metin Kilinc; Deniz Cemgil Arikan; Hasan Cetin Ekerbicer

OBJECTIVE(S) To evaluate selenium (Se) levels in serum and their relation with hyperandrogenism and insulin resistance (IR) in women with polycystic ovary syndrome (PCOS) and in control subjects. STUDY DESIGN Women with any gynecological problem who presented to the Kahramanmaras Sutcuimam University Medical Faculty Gynecology and Obstetric Outpatient Clinic were invited to participate. Group 1 consisted of 36 cases with a diagnosis of PCOS according to the 2003 Rotterdam Consensus Criteria, and Group 2 (control group) consisted of 33 age- and BMI-matched healthy women. In all cases, serum total testosterone (tT), dihydroepiandrostenedione-sulfate (DHEAS), follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), insulin, glucose (mg/dL), total cholesterol (TC) (mg/dL), high density lipoprotein-cholesterol (HDL-C) (mg/dL), low density lipoprotein-cholesterol (LDL-C) (mg/dL), triglyceride (TG) (mg/dL) and Se levels were measured. RESULTS The level of FSH was significantly lower, and the levels of LH, E2, tT, and DHEAS were significantly higher in group 1 than in group 2 (p<0.05). The hirsutism score was significantly higher among PCOS women compared to the control group (p<0.05). Although insulin levels and HOMA-IR were markedly increased in the PCOS group compared to the control group, the differences were not significant (p>0.05). The plasma Se level was significantly lower in PCOS women compared to the control group (p<0.05). When we combined the all women in two groups, regarding them as one group (combined group, n=69), a negative correlation between Se and LH and tT was present (p<0.05). CONCLUSION(S) Our results show decreased plasma concentrations of Se and a negative correlation between Se and LH, tT in women with PCOS. These results indicate that Se may play a role in the pathogenesis of PCOS related with hyperandrogenism.


Biological Trace Element Research | 2011

Plasma Selenium, Zinc, Copper and Lipid Levels in Postmenopausal Turkish Women and Their Relation with Osteoporosis

Deniz Cemgil Arikan; Ayhan Coskun; Ali Ozer; Metin Kilinc; Filiz Atalay; Tugba Atilan Arikan

It has been shown that the trace elements and lipids play role in the growth, development and maintenance of bones. We aimed to investigate serum selenium (Se), zinc (Zn), copper (Cu) and lipid (total cholesterol, triglyceride (TG), high density lipoprotein-cholesterol, low-density lipoprotein–cholesterol) levels in postmenopausal women with osteoporosis, osteopenia and in healthy controls, and to determine the relationship between Se, Zn, Cu and lipid parameters and bone mineral density (BMD). The study included 107 postmenopausal women; 35 healthy (group 1), 37 osteopenic (group 2) and 35 osteoporotic (group 3). The women in all three groups were carefully matched for body mass index (BMI). Serum concentrations of Se, Zn and Cu were measured by atomic absorption spectrophotometry. Plasma Se, Cu, Zn and lipid levels were similar in all groups (p > 0.05). When we combined the women in each of the three groups, and considered them as one group (n = 107) we found a positive correlation between BMI and lumbar vertebra BMD, femur neck BMD, femur total BMD; a positive correlation between TG and femur neck BMD, femur total BMD; a positive correlation between Zn and lumbar vertebra BMD (total T score) (p < 0.05). There was no correlation between Se, Cu, Zn, P and lipid parameters (p > 0.05). Although BMI has a positive effect on BMD, trace elements and lipids, except Zn and TG, did not directly and correlatively influence BMD. Further studies are needed to clarify the role and relationship of trace elements and lipid parameters in postmenopausal osteoporosis.


Fertility and Sterility | 2008

Uterus didelphys with an obstructed unilateral vagina by a transverse vaginal septum associated with ipsilateral renal agenesis, duplication of inferior vena cava, high-riding aortic bifurcation, and intestinal malrotation: a case report

Ayhan Coskun; Nazan Okur; Ozdemir O; Gurkan Kiran; Deniz Cemgil Arýkan

OBJECTIVE To present a case of müllerian defects associated with other anomalies, including ipsilateral renal agenesia, duplication of inferior vena cava, high-riding aortic bifurcation, and intestinal malrotation. DESIGN Case study. SETTING Academic medical center. PATIENT(S) A 16-year-old woman with müllerian defects associated with vascular and intestinal anomalies. INTERVENTION(S) Excision of vaginal septum. MAIN OUTCOME MEASURE(S) Improvement of symptoms caused by obstructed müllerian defect. RESULT(S) After an incision on the vaginal septum, a large amount of chocolate-colored fluid was drained, and the dimensions of the right uterus were diminished. Then the vaginal septum was excised completely; we saw a second distinct cervical portion. CONCLUSION(S) Uterus didelphys with obstructed hemivagina is almost always associated with renal agenesis ipsilateral to the obstruction. Inferior vena cava duplication associated with müllerian anomalies is an extremely rare condition. In addition, the presented case also had a high-riding aortic bifurcation and intestinal malrotation. To the best of our knowledge, this is the first case to include all of these anomalies.


Taiwanese Journal of Obstetrics & Gynecology | 2011

Serologic and stool antigen assay of Helicobacter pylori infection in hyperemesis gravidarum: Which test is useful during early pregnancy?

Melih A. Guven; Ibrahim Egemen Ertas; Ayhan Coskun; Pinar Ciragil

OBJECTIVE To investigate the relationship between Helicobacter pylori infection and hyperemesis gravidarum (HG) during early pregnancy by using serologic and stool antigen tests in developing South Anatolia region of Turkey. MATERIALS AND METHODS A prospective cross-sectional study was performed on 40 pregnant women with HG and 40 asymptomatic controls without gastric problems at 7-12 weeks of gestation. The sociodemographic characteristics were recorded. The presence of H pylori was analyzed in the sera of the study-group patients by serology-specific IgG test in serum and by a stool antigen test in fecal samples. RESULTS The rates of serology-specific H pylori IgG positivity were 80% (32 of 40) in patients with HG and 35% (14 of 40) in control group. The difference between the two groups was significant [odds ratio: 6.9 (confidence interval: 2.2-22.1); p<0.01]. The rates of H pylori stool antigen test positivity were 87.5% (35 of 40) in patients with HG and 62.5% (25 of 40) in control groups. The difference between the two groups was significant (odds ratio: 4.5, confidence interval: 1.09-18.5); p=0.028. CONCLUSION Both serology-specific IgG and stool antigen tests seem to be good screening methods to identify H pylori in our pregnant patient population with HG during early pregnancy.


European Journal of Obstetrics & Gynecology and Reproductive Biology | 2011

Modified Ferriman–Gallwey hirsutism score and androgen levels in Turkish women

Ayhan Coskun; Önder Ercan; Deniz Cemgil Arikan; Ali Ozer; Metin Kilinc; Gurkan Kiran; Bülent Köstü

OBJECTIVE(S) To evaluate a modified Ferriman-Gallwey (mFG) scoring system and serum total testosterone (tT) and dehydroepiandrosterone sulfate (DHEAS) levels, in women with polycystic ovary syndrome (PCOS) and in control subjects. STUDY DESIGN Women with any gynecological problem who presented to the Kahramanmaras Sutcuimam University Medical Faculty Gynecology and Obstetric Outpatient Clinic in the Mediterranean region of Turkey were assessed prospectively. Oligo-anovulation, clinical and biochemical hyperandrogenism, and PCO appearance on ultrasound that met the 2003 Rotterdam Consensus Criteria were used for PCOS diagnosis. Group 1 consisted of 43 cases with a diagnosis of PCOS and group 2 (control group) consisted of 75 age and BMI matched control subjects without PCOS. RESULTS In groups 1 and 2, clinical hyperandrogenism (hirsutism) appearance ratio was 86.0% (37/43) and 18.0% (15/75) (p < 0.001); while biochemical hyperandrogenism (high serum tT or DHEAS level) was 65.1% (28/43) and 36% (27/75) (p < 0.05), respectively. In groups 1 and 2, mean serum tT levels were 115.2 and 73.4 ng/dL (p < 0.001), mean serum DHEAS levels were 256.1 and 177.7 ng/dL (p < 0.001), and mean hirsutism scores were 11.2 and 5.5 (p < 0.001), respectively. Serum mean tT, DHEAS and hirsutism scores for group 1 were significantly higher than those of group 2 (<0.001). No correlation was observed between BMI and the hirsutism scores or the biochemical hyperandrogenism in both groups. CONCLUSION(S) In our study, mean serum androgen levels and hirsutism ratio in the PCOS group were higher than the control group. These values were also substantially higher than those previously published in the literature.

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Dive into the Ayhan Coskun's collaboration.

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Deniz Cemgil Arikan

Kahramanmaraş Sütçü İmam University

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Gurkan Kiran

Kahramanmaraş Sütçü İmam University

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Melih A. Guven

Kahramanmaraş Sütçü İmam University

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Metin Kilinc

Kahramanmaraş Sütçü İmam University

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Ozdemir O

Kahramanmaraş Sütçü İmam University

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Hakan Kiran

Kahramanmaraş Sütçü İmam University

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Bülent Köstü

Kahramanmaraş Sütçü İmam University

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Hamide Sayar

Kahramanmaraş Sütçü İmam University

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Hasan Cetin Ekerbicer

Kahramanmaraş Sütçü İmam University

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