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Dive into the research topics where N. Cenk Sayin is active.

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Featured researches published by N. Cenk Sayin.


Fertility and Sterility | 2003

Maternal serum cytokine levels in women with hyperemesis gravidarum in the first trimester of pregnancy

Petek Balkanlı Kaplan; Fatih Gücer; N. Cenk Sayin; Mahmut Yüksel; M. Ali Yüce

OBJECTIVE To compare serum cytokine levels in patients with hyperemesis gravidarum with levels in healthy pregnant and nonpregnant women. DESIGN Case-control study. SETTING Clinical and academic research center. PATIENT(S) Thirty women with hyperemesis gravidarum, 30 healthy women in the first trimester of pregnancy, and 30 healthy nonpregnant women. MAIN OUTCOME MEASURE(S) Serum levels of interleukin-1beta, interleukin-2 receptor, interleukin-6, interleukin-8, and tumor necrosis factor (TNF)-alpha. RESULT(S) Median serum levels of interleukin-2 receptor and interleukin-8 did not differ significantly among the three groups. Serum levels of interleukin-1beta and interleukin-6 were significantly higher in healthy pregnant women than in healthy nonpregnant women. Median TNF-alpha levels were significantly higher in women with hyperemesis (25.8 pg/mL [range, 4.9-140 pg/mL]) than in healthy pregnant and nonpregnant women (10.85 pg/mL [range, 4.1-35.8 pg/mL] and 12 pg/mL [4.3-68.2 pg/mL], respectively). CONCLUSION(S) Levels of TNF-alpha were significantly higher in patients with hyperemesis gravidarum than in healthy pregnant and nonpregnant women. Thus, TNF-alpha may be involved in the etiology of hyperemesis gravidarum.


Gynecological Endocrinology | 2003

Insulin resistance and lipid profile in women with polycystic appearing ovaries: implications with regard to polycystic ovary syndrome

N. Cenk Sayin; Fatih Gücer; Petek Balkanlı-Kaplan; M. Ali Yüce

The aim of this study was to investigate carbohydrate and lipid profiles in women with polycystic appearing ovaries (PCO) on ultrasound examination who did not fulfill the criteria for polycystic ovary syndrome (PCOS). We sonographically evaluated and biochemically diagnosed 35 patients with PCO, 31 women with PCOS and 23 healthy controls. We performed oral glucose tolerance tests (OGTT) and calculated the quantitative insulin sensitivity check index (QUICKI) and the homeostatic model assessment (HOMAIR) scores. Serum fasting insulin levels, 1-h insulin response, HOMAIR and QUICKI scores were significantly higher in the PCO and PCOS groups than in the controls. However, serum fasting glucose levels, fasting insulin levels, HOMAIR and QUICKI scores were similar in women with PCO and PCOS. In women with PCO, high-density lipoprotein (HDL) levels were higher, and very-low-density lipoprotein (VLDL) and triglyceride levels were lower compared with women with PCOS. Furthermore, insulin responses to OGTT, HOMAIR and QUICKI scores and lipid values correlated with serum androgen levels and body mass index (BMI) in PCO patients. In conclusion, women with PCO who do not fulfill the criteria for PCOS have abnormal insulin sensitivity and insulin resistance. The finding of similar insulin abnormalities in women with PCO to those in women with PCOS confirms that women with PCO have similar metabolic characteristics to those with PCOS.


Fertility and Sterility | 2001

Maternal serum levels of tumor necrosis factor-α and interleukin-2 receptor in threatened abortion: a comparison with normal and pathologic pregnancies

Fatih Gücer; Petek Balkanlı-Kaplan; Mahmut Yüksel; N. Cenk Sayin; M. Ali Yüce

OBJECTIVE We evaluated tumor necrosis factor-alpha (TNF-alpha) and interleukin-2 (IL-2) receptor levels in patients with threatened abortion and compared the levels with normal and pathologic pregnancies. DESIGN A prospective, nonrandomized, case-control study. SETTING Academic research setting. PATIENT(S) Twenty-two patients with threatened abortion, 18 patients with pathologic pregnancies, 20 healthy pregnant women, and 20 nonpregnant women. INTERVENTION(S) Maternal serum TNF-alpha and IL-2 receptor levels were measured with a solid-phase, two-site chemiluminescent enzyme immunometric assay method. MAIN OUTCOME MEASURE(S) TNF-alpha and IL-2 receptor levels. RESULT(S) The mean +/- SEM maternal serum IL-2 receptor level for patients with threatened abortion was 481.3 +/- 35.7 U/mL, compared with 426.5 +/- 22.4 U/mL in the normal pregnant group. There was no statistically significant difference in the mean +/- SEM serum TNF-alpha level between the patients with threatened abortion and those with normal pregnancies (16.1 +/- 2.7 pg/mL vs. 10.9 +/- 0.8 pg/mL). The mean +/- SEM maternal serum IL-2 receptor level was significantly higher in patients with pathologic pregnancies than in those with normal pregnancies (506.2 +/- 27.6 U/mL vs. 426.5 +/- 22.4 U/mL). The mean +/- SEM maternal serum TNF-alpha level was significantly higher in patients with pathologic pregnancies than in those with threatened abortion (39.2 +/- 9.5 pg/mL vs. 16.1 +/- 2.7 pg/mL) and normal pregnancies (39.2 +/- 9.5 pg/mL vs. 10.9 +/- 0.8 pg/mL). CONCLUSION(S) In comparison with normal pregnancies, maternal serum IL-2 receptor and TNF-alpha levels were not significantly increased in patients with threatened abortion with good outcome.


European Journal of Obstetrics & Gynecology and Reproductive Biology | 2010

The effects of ritodrine and magnesium sulfate on maternal and fetal Doppler blood flow patterns in women with preterm labor.

N. Cenk Sayin; Sezer Arda; Füsun Varol; Necdet Sut

OBJECTIVE To determine the effects of ritodrine and magnesium sulfate on maternal-fetal blood flows. STUDY DESIGN A total of 85 pregnant women between 26th and 36th weeks with preterm labor, and 83 healthy pregnant women were included. Patients in the study group were randomly assigned to receive either ritodrine (with the addition of verapamil) (n=46) or magnesium sulfate (n=39). Blood flow examinations on the umbilical artery (UA), middle cerebral artery (MCA), bilateral uterine arteries (Ut.A) and ductus venosus (DV) were performed before and 48 h after initiating therapy. RESULTS UA pulsatility index (PI) significantly differed in women receiving tocolysis compared to controls after 48 h. DV PI increased in women receiving MgSO(4), whereas it decreased in the ritodrine and control groups. Ut.A values did not significantly change after 48 h in the groups. In women between the 26th and 32nd weeks, UA, MCA and DV PI did not significantly change after 48 h in the three groups. However, in women between the 32nd and 36th weeks UA and MCA PI significantly differed in the treatment groups compared to controls after 48 h. DV PI increased in women receiving MgSO(4), whereas it decreased in the ritodrine and control groups. CONCLUSIONS MgSO(4) and ritodrine affect blood flow patterns after 48 h in some maternal-fetal vessels. These effects on blood flow are particularly significant in women between 32nd and 36th weeks. The effects of both drugs on fetal and maternal Doppler flows seem similar, except the increased resistance to flow in DV in women receiving MgSO(4).


Fertility and Sterility | 2003

Live birth of healthy twins after a heterotopic tubal and intrauterine twin pregnancy in a woman who was stimulated with clomiphene citrate.

N. Cenk Sayin

OBJECTIVE To report a heterotopic pregnancy with successful delivery of monochorionic-diamniotic twins after rupture of the tubal ectopic gestation. DESIGN Case report. University teaching hospital. PATIENT(S) A patient with heterotopic twin monochorionic-diamniotic pregnancy. INTERVENTION(S) Surgical removal of the ectopic pregnancy. MAIN OUTCOME MEASURE(S) Pregnancy course and outcome. The patient successfully delivered twins. CONCLUSION(S) Heterotopic pregnancy after clomiphene citrate administration may have a complicated course, but could end in successful live birth of twins.


Clinical Rheumatology | 2005

Splenic infarction in a pregnant woman with systemic lupus erythematosus

Mehmet Soy; N. Cenk Sayin; Ercüment Ünlü

Here we describe a 20-year-old pregnant woman with systemic lupus erythematosus who had high anticardiolipin antibodies and presented with splenic infarction.


Clinical and Applied Thrombosis-Hemostasis | 2009

Correlation Between Maternal Plasma Thrombomodulin and Infant Birth Weight in Hypertensive Disorders of Pregnancy

Füsun Varol; Levent Özgen; N. Cenk Sayin; Muzaffer Demir

Objective: To evaluate the association between maternal plasma thrombomodulin levels and infant birth weights in pregnancy-induced hypertension. Study design: Plasma thrombomodulin levels were measured in 80 pregnant women living in the Trakya region of Turkey. Of these patients, 30 were with severe preeclampsia, 10 with HELLP syndrome, 10 with eclampsia, and 30 were normotensive healthy pregnant women. Plasma thrombomodulin levels were determined by the enzyme-linked immunosorbent assay method. The correlation analysis between thrombomodulin and birth weight and placental weights was done using analysis of variance and Bonferroni test (significance at P < .05). Kruskal-Wallis statistical analysis was performed in comparison of the descriptive and laboratory data (significance at P < .05). Results: The plasma thrombomodulin values in hypertensive disorders in pregnancy were found to be highly correlated with the infant birth weights (P < .001). In HELLP syndrome, the highest thrombomodulin levels (94.69 + 10.41 ng/mL) were associated with the lowest infant birth weight (1509.70 + 187.55 g) in the study population. Thrombomodulin in eclampsia (81.37 + 3.59 ng/mL) showed an association with infant birth weight (2078 + 132.65 g). Although thrombomodulin levels in severe preeclampsia (67.15 + 3.72 ng/mL) were associated with the values (1748.20 + 132.62 g) in infant birth weight, thrombomodulin levels of the control group demonstrated the mean (48.06 + 2.45) with the highest infant birth weight (3228.85 + 84.83) in the total group. Conclusion: Elevated plasma thrombomodulin levels in hypertensive disorders of pregnancy were well correlated with related infant birth weights of these pathologies. Plasma thrombomodulin levels might point out placental vascular endothelial damage reflecting on infant birth weights.


Journal of Maternal-fetal & Neonatal Medicine | 2018

Use of prokineticin-1 (PROK1), pregnancy-associated plasma protein A (PAPP-A) and PROK1/PAPP-A ratio to predict adverse pregnancy outcomes in the first trimester: a prospective study

Cihan Inan; Füsun Varol; Selen Gursoy Erzincan; Isil Uzun; Havva Sutcu; N. Cenk Sayin

Abstract Introduction: To compare the predictive effectiveness levels of prokineticin-1 (PROK1), pregnancy-associated plasma protein A (PAPP-A) and the PROK1/PAPP-A ratio in the first trimester for preeclampsia (PE), foetal growth restriction (FGR), gestational diabetes mellitus (GDM) and spontaneous preterm birth (SPB). Materials and methods: A total of randomly selected 162 pregnant women were included. Peripheral blood samples were obtained between 110/7 and 136/7 gestational weeks (GWs). All women were followed throughout the pregnancy and classified into five groups as having PE, FGR, GDM, SPB and uncomplicated pregnancies. The cut-off levels of the markers were identified to predict adverse outcomes. Results: PROK1 predicted PE with 83.3% sensitivity, 85.7% specificity at a value of >293.4 pg/mL; at a value of >260.2 pg/mL, PROK1 predicted FGR with 85.7% sensitivity, 72.5% specificity in the first trimester. The area under receiver operating characteristic (ROC) curve of PAPP-A was lower than that of PROK1 and PROK1/PAPP-A in differentiating PE and FGR from the uncomplicated group (p < .001). PROK1 levels and the PROK1/PAPP-A ratios in the SPB and GDM groups were lower than in the uncomplicated group (p < .01). Conclusions: Elevated PROK1 in the first trimester is a more effective marker than PAPP-A in the prediction of PE and FGR. Lower PROK1 levels are associated with the development of SPB and GDM.


Placenta | 2018

Relationship between second-trimester amniotic fluid levels of Prokineticin-1 and Matrix Metalloproteinase-2 with adverse pregnancy outcome

Selen Gursoy Erzincan; Füsun Varol; Cihan Inan; N. Cenk Sayin

To investigate the levels of Prokineticin-1 (PROK1) and matrix metalloproteinase-2 (MMP-2) in second-trimester amniotic fluid (AF). AF samples were investigated in 81 patients. AF-PROK1 and AF-MMP-2 were not significantly associated with adverse pregnancy outcomes (preeclampsia, intrauterine growth retardation, spontaneous preterm birth, gestational diabetes, gestational hypertension). AF-PROK1 levels in patients with abnormal first-trimester screening were significantly higher than those who underwent amniocentesis due to abnormal second-trimester screening tests (p = .04). AF-PROK1 or AF-MMP-2 do not have a role in the prediction of adverse pregnancy outcomes.


International Journal of Gynecology & Obstetrics | 2018

Effects of betamethasone on fetoplacental and maternal hemodynamics in preterm pregnancies

Cihan Inan; N. Cenk Sayin; Zehra Nihal Dolgun; Selen Gursoy Erzincan; Isil Uzun; Havva Sutcu; Necdet Sut; Füsun Varol

To evaluate the possible effects of prenatal steroid administration on Doppler parameters of the umbilical artery, uterine artery, middle cerebral artery, and ductus venosus, the cerebroplacental ratio, and the amniotic fluid index in preterm fetuses.

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