Ahmet Zeki Nessar

Dr. Ahmet Zeki Nessar

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 December 2025 in Medicine
Verified
Journal Article
Open access
SKsebnem karagun
sebnem karagun
ANAhmet Zeki Nessar
Ahmet Zeki Nessar
YDYusuf Dal
Yusuf Dal
SKSefanur Karaca
Sefanur Karaca
Mürşide ÇEVİKOĞLU KILLIMürşide ÇEVİKOĞLU KILLI
Mürşide ÇEVİKOĞLU KILLI
ACAyhan Coşkun
Ayhan Coşkun
Preeclampsia (PE) is characterized by systemic inflammation and endothelial dysfunction, contributing to adverse maternal and neonatal outcomes. Antenatal corticosteroids (ACS) therapy is widely used to enhance fetal lung maturity in women at risk of preterm birth. However, little is known about the dynamic changes in maternal inflammatory markers after ACS administration in PE and their potential predictive value for perinatal outcomes. This retrospective cohort study included 206 pregnant women with PE who received ACS therapy due to preterm birth risk. Complete blood count (CBC) parameters and systemic inflammatory indices were recorded before and after ACS. Delta (Δ) values were calculated to reflect the percentage change between pre- and post-ACS measurements. Correlations between Δ inflammatory markers and perinatal outcomes were analyzed, and predictive performance was assessed using receiver operating characteristic (ROC) curve analysis. Following ACS administration, neutrophil-to-lymphocyte ratio (NLR), systemic immune-inflammation index (SII), and aspartate aminotransferase-to-platelet ratio (APRI) increased significantly, while lymphocyte-to-monocyte ratio (LMR) and platelet-to-lymphocyte ratio (PLR) decreased. Δ mean platelet volume (MPV), Δ aspartate aminotransferase (AST), Δ Lactate Dehydrogenase (LDH), ΔNLR, and ΔAPRI showed low-level positive correlations with umbilical cord blood pH. ROC analysis indicated that ΔMPV ≤ 1.81 (area under the curve (AUC) = 0.664) and ΔAPRI ≤ 1.81 (AUC = 0.605) moderately predicted neonatal intensive care unit (NICU) admission. Dynamic changes in maternal inflammatory markers occur after ACS therapy in preeclamptic pregnancies. ΔMPV and ΔAPRI demonstrated potential predictive value for NICU admission, highlighting their possible clinical utility in risk stratification. These findings provide novel insight into the maternal inflammatory response to ACS in PE and its implications for perinatal outcomes.

30 June 2025 in Hypertension in Pregnancy
Verified
Journal Article
Open access
SKsebnem karagun
sebnem karagun
HYHAMZA YILDIZ
HAMZA YILDIZ
YDYusuf Dal
Yusuf Dal
SKSefanur Karaca
Sefanur Karaca
ANAhmet Zeki Nessar
Ahmet Zeki Nessar
ACAyhan Coşkun
Ayhan Coşkun
Proteinuria is a widely used biomarker for risk stratification in hypertensive pregnancies, with potential predictive value for adverse maternal and perinatal outcomes. This study evaluated the predictive value of 24-hour urine protein levels for adverse maternal and perinatal outcomes in hypertensive pregnancies. A retrospective cohort of 213 pregnant women with hypertension was categorized into four groups based on proteinuria severity: 2000 mg (n = 19). Higher proteinuria levels were significantly associated with increased rates of oligohydramnios (p = 0.001) and fetal growth restriction (FGR; p = 0.005), particularly in the > 2000 mg group (44.0% and 68.4%, respectively). Gestational age at delivery decreased with worsening proteinuria (p < 0.001), with the lowest mean age (32.84 ± 3.82 weeks) in the > 2000 mg group. Postpartum hospital stays were prolonged in chronic hypertension (p = 0.002) and severe proteinuria groups (p = 0.007). ROC analysis identified a 24-hour urine protein cutoff of 135 mg (AUC: 0.635, p = 0.001) for predicting fetal distress. The > 2000 mg group had universal magnesium sulfate use, earlier deliveries, and higher FGR rates. Chronic hypertension correlated with longer postpartum stays (p = 0.002) and higher postpartum renal disease (p = 0.040). These findings underscore proteinuria as a prognostic marker for adverse outcomes, supporting its role in risk stratification for hypertensive pregnancies. Future research should validate thresholds and explore targeted interventions.

21 March 2025 in BMC Pregnancy and Childbirth
Verified
Journal Article
Open access
PDF file
FAFikriye Işıl Adıgüzel
Fikriye Işıl Adıgüzel
SASerhat Altınkaya
Serhat Altınkaya
SKSadık Kükrer
Sadık Kükrer
ANAhmet Zeki Nessar
Ahmet Zeki Nessar
GUGülsüm Uysal
Gülsüm Uysal
CACevdet Adıgüzel
Cevdet Adıgüzel
We conducted our study to investigate the relationships between hyperemesis gravidarum (HEG) and inflammatory markers such as the neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and monocyte-to-lymphocyte ratio (MLR). A total of 150 pregnant women diagnosed with HEG and 150 controls were included in our study. The data analysed included demographic variables, complete blood count results, and urinary ketonuria levels. We found that the NLR, PLR and MLR were significantly greater in HEG patients than in controls (p < 0.05), indicating a potential role of systemic inflammation in the pathophysiology of HEG. Receiver operating characteristic (ROC) analysis revealed that these markers had moderate discriminative power, suggesting their utility as adjunctive diagnostic tools in clinical settings. However, no correlation was found between inflammatory markers and the severity of ketonuria. The NLR, PLR and MLR can be used as indicators of HEG as a result of the inflammatory process in pregnant women with HEG.

27 August 2024 in Journal of Clinical Ultrasound
Verified
Journal Article
Closed access
YDYusuf Dal
Yusuf Dal
FAFatih Akkuş
Fatih Akkuş
SKsebnem karagun
sebnem karagun
ANAhmet Zeki Nessar
Ahmet Zeki Nessar
SKSefanur Karaca
Sefanur Karaca
ACAyhan Coşkun
Ayhan Coşkun


11 October 2025 in American Journal of Reproductive Immunology
Verified
Journal Article
Closed access
SKsebnem karagun
sebnem karagun
HYHAMZA YILDIZ
HAMZA YILDIZ
YDYusuf Dal
Yusuf Dal
ANAhmet Zeki Nessar
Ahmet Zeki Nessar
SKSefanur Karaca
Sefanur Karaca
ACAyhan Coşkun
Ayhan Coşkun