Yazar "Karaer, A." seçeneğine göre listele
Listeleniyor 1 - 13 / 13
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Acardiacus acephalus type twin pregnancy(Taylor & Francis Inc, 2011) Celik, O.; Karaer, A.; Cagiran, F. T.; Kaplan, S.[Abstract Not Available]Öğe The effect of vaginal microbiota on the outcome of assisted reproductive technologies(Oxford Univ Press, 2020) Karaer, A.; Dogan, B.; Tuncay, G.; Gunal, S.; Tecellioglus, A. N.[Abstract Not Available]Öğe Follicular fluid adenosine deamines (ADA), superoxide dismutase and nitric oxide levels in GnRH agonist and antagonist cycles(Oxford Univ Press, 2012) Celik, E.; Celik, O.; Kumbak, B.; Yilmaz, E.; Turkcuoglu, I.; Simsek, Y.; Karaer, A.[Abstract Not Available]Öğe Glutathione, malondialdehyde and nitric oxide levels in endometrium of patients with unexplained infertility during the implantation window(Oxford Univ Press, 2012) Karaer, A.; Celik, O.; Karabulut, A. Bay; Celik, E.; Kiran, T. R.; Simsek, O. Y.; Yilmaz, E.[Abstract Not Available]Öğe High-resolution 1H-NMR spectroscopy indicates variations in metabolomics profile of follicular fluid from women with advanced maternal age(Springer/Plenum Publishers, 2020) Dogan, B.; Karaer, A.; Tuncay, G.; Tecellioglu, N.; Mumcu, A.Aim To reveal whether there are differences in follicular fluid metabolomics profile of women with advanced maternal age (AMA). Method The group with advanced maternal age includes 23 patients above the age of 40, and the control group includes 31 patients aged between 25 and 35 years and AMH values above 1.1 ng/mL with no low ovarian response history. A single follicular fluid sample from a MII oocyte obtained during the oocyte pick-up procedure was analyzed with high-resolution H-1-NMR (nuclear magnetic resonance) spectroscopy. The results were evaluated using advanced bioinformatics analysis methods. Results Statistical analysis of the NMR spectroscopy data from two groups showed that alpha-glucose and beta-glucose levels of follicular fluid were decreased in the patients with AMA, while in contrast, lactate and trimethylamine N-oxide (TMAO) levels were increased in these patients compared with the controls. In addition to these, there was an increase in alanine levels and a decrease in acetoacetate levels in patients with AMA. However, these changes were not statistically significant. Conclusion Obtained results suggest that the follicular cell metabolism of patients with AMA is different from controls. These environmental changes could be associated with the low success rates of IVF treatment seen in these patients.Öğe Lipid features of polycystic ovary syndrome under different diagnostic criteria(Oxford Univ Press, 2013) Celik, E.; Turkcuoglu, I.; Ata, B.; Karaer, A.; Kirici, P.; Berker, B.[Abstract Not Available]Öğe Metabolomics analysis of seminal plasma in patients with idiopathic Oligoasthenoteratozoospermia using high-resolution NMR spectroscopy(Wiley, 2020) Mumcu, A.; Karaer, A.; Dogan, B.; Tuncay, G.Background Male infertility is a global health issue caused by a combination of different factors. Specialists generally rely on semen analysis to diagnose male infertility. However, it is known that diagnostic semen analysis fails to identify about 50% of male infertility disorders. Recently, metabolomics has been proven to be a powerful technique for the diagnosis of different diseases. Objective To determine whether metabolites could be used as potential biomarkers for the diagnosis of male factor infertility through comparing seminal plasma samples from infertile men with oligoasthenoteratozospermia (OAT) and samples from normozoospermic controls. Materials and methods This study utilized high-resolution H-1 NMR spectroscopy to reveal whether the metabolomic changes of seminal plasma obtained from 31 patients with oligoasthenoteratozospermia (OAT) are different from the ones obtained from 28 normozoospermic controls. Results Multivariate statistical analysis of NMR data concluded that the metabolomic profile of samples from patients with OAT exhibits statistically significant differences when compared to the controls. The differences were based on the metabolites lactate, citrate, lysine, arginine, valine, glutamine, creatinine, alpha-ketoglutaric acid, spermine, putrescine, and tyrosine. Except the tyrosine, levels of the above metabolites were significantly decreased in patients with OAT compared to the controls. The levels of citrate, choline, spermine, putrescine, alpha-ketoglutaric acid, valine, and tyrosine were significantly different (p < 5 x 10(-4)) between two groups. On the other hand, levels of lactate, creatinine, lysine, arginine, and glutamine were also statistically significant (0.001 p < 0.05). However, considering the p-values, the physiological relevance of these metabolites may be lower when compared to the others. A PLS-DA model built on the NMR data achieved 89.29% sensitivity and 93.55% specificity results in a leave-one-out cross-validation process. Discussion and conclusion H-1 NMR spectroscopy-based metabolomic analysis could be used as a diagnostic tool for the diagnosis of oligoasthenoteratozospermia.Öğe Prokineticin 1 leukemia inhibitory factor and Dickkopf 1 mRNA expression in the endometrium of women with unexplained infertility and idiopathic recurrent pregnancy loss(Oxford Univ Press, 2014) Karaer, A.; Cigremis, Y.; Celik, E.; Gonullu, R.[Abstract Not Available]Öğe Role of endometrial concentrations of heavy metals (cadmium, lead, mercury and arsenic) in the aetiology of unexplained infertility(Elsevier, 2014) Tanrikut, E.; Karaer, A.; Celik, O.; Celik, E.; Otlu, B.; Yilmaz, E.; Ozgul, O.Objective: To determine the role of endometrial concentrations of heavy metals (cadmium, lead, mercury and arsenic) in the aetiology of unexplained infertility. Study design: Thirty-three women with unexplained infertility and 32 fertile women were recruited. Endometrial biopsies were collected during the putative window of implantation (cycle days 20-24). The concentrations of cadmium, lead, mercury and arsenic were measured in endometrial biopsy specimens using atomic absorption spectrometry. Results: Cadmium was detected in 91% (30/33) of women with unexplained infertility, compared with 34% (11/32) of fertile women. The median endometrial cadmium concentration was 19.58 (interquartile range 1.46-30.23) mu g/l in women with unexplained infertility, compared with 0.00 (interquartile range 0.00-0.40) mu g/l in fertile women. Lead was detected in 15% (5/33) of women with unexplained infertility and 3% (1/32) of fertile women. Mercury and arsenic were not detected in any endometrial samples from either group. Conclusion: A significant difference in endometrial cadmium concentration was found between women with unexplained infertility and fertile women. This suggests that cadmium may be a contributing factor in the aetiology of unexplained infertility. (C) 2014 Elsevier Ireland Ltd. All rights reserved.Öğe Therapeutic efficiency of atosiban, an oxytocin receptor antagonist in the treatment of experimental endometriosis(Oxford Univ Press, 2011) Simsek, Y.; Celik, O.; Yilmaz, E.; Karaer, A.; Koc, O.; Aydin, N. E.[Abstract Not Available]Öğe The vaginal microbiota composition of women undergoing assisted reproduction: a prospective cohort study(Wiley, 2021) Karaer, A.; Dogan, B.; Gunal, S.; Tuncay, G.; Duz, S. Arda; Unver, T.; Tecellioglu, N.Objective To evaluate the impact of vaginal microbiota on pregnancy outcomes in women undergoing assisted reproduction. Design A prospective cohort study. Setting A university-based assisted reproductive technology (ART) centre. Population 223 women undergoing ART treatment. Methods Prior to embryo transfer, vaginal samples were collected from the posterior fornix. Vaginal microbiota identification was carried out using next-generation sequencing and categorised according to the V3-V4 hypervariable region in the 16S rRNA gene region. Main outcome measures ART clinical outcomes (implantation, clinical pregnancy rates and live birth rates). Results The live birth rate in women with community state type (CST)-I (39%) was higher than that in women with CST-III (21.5%) but the difference was not statistically significant (P = 0.052). The relative abundance of Lactobacillus was lower in women who failed to become pregnant (NP group) (67.71%) than in women who became pregnant (PR group) (79.72%). However, this difference was not statistically significant (P = 0.06). In the NP group, the relative abundance of Streptococcus (7.81%) and Gardnerella (9.40%) was higher than that in the PR group (relative abundance of Streptococcus and Gardnerella was 2.28% and 5.56%, respectively). The abundance of Streptococcus was found to be statistically significantly different between the two study groups (P = 0.014). Linear discriminant analysis (LDA) further validated that Streptococcus had the highest contribution (LDA score >4.0) to the difference between these two groups. Conclusions Streptococcus has the highest contribution to the distinction between the PR and NP groups. Tweetable abstract A relatively high abundance of Streptococcus in the vaginal microbiota may be associated with a lower ART success rate.Öğe XPD and XRCC1 gene polymorphism in patients with normal and abnormal cervical cytology by pap smear(Verduci Publisher, 2012) Yilmaz, E.; Celik, O.; Celik, E.; Turkcuoglu, I.; Simsek, Y.; Karaer, A.; Otlu, B.AIM: The purpose of the present study was to identify the role of abnormalities in DNA repair pathways by measuring the XPD and XRCC1 gene polymorphisms. MATERIALS AND METHODS: Thirty-five patients with abnormal cervical cytology (study group) and 10 women with normal cytology (control group) were included in the study. The polymorphisms of XRCC1 Arg194Trp, XRCC1 Arg399Gln and XPD Lys751Gln genes were investigated from the blood samples. RESULTS: There was no statistically significant difference in allele frequencies of XPD gene among the groups (p = 0.097), while XRCC1R399Q gene polymorphism was strikingly more frequent in the study group than that of control cases (p = 0.029). The prevalence of XRCC1R194W gene polymorphism on the other hand, was similar between the groups (p = 0.579). CONCLUSIONS: Patients with abnormal and normal cervical cytology have similar XPD gene polymorphism. However, the frequency of gene polymorphism in XRCC1 Arg 399 Gln codon was significantly higher in abnormal cervical cytology group.Öğe XPD and XRCC1 gene polymorphism in patients with normal and abnormal cervical cytology by pap smear(European Review for Medical and Pharmacological Sciences, 2012) Yılmaz, E.; Çelik, Ö.; Türkçüoğlu, I.; Şimşek, Y.; Karaer, A.; Otlu, Barış; Gülbay, G.; Yeşilada, E.The purpose of the present study was to identify the role of abnormalities in DNA repair pathways by measuring the XPD and XRCC1 gene polymorphisms. MATERIALS AND METHODS: Thirty-five patients with abnormal cervical cytology (study group) and 10 women with normal cytology (control group) were included in the study. The polymorphisms of XRCC1 Arg194Trp, XRCC1 Arg399Gln and XPD Lys751Gln genes were investigated from the blood samples. RESULTS: There was no statistically significant difference in allele frequencies of XPD gene among the groups (p = 0.097), while XRCC1R399Q gene polymorphism was strikingly more frequent in the study group than that of control cases (p = 0.029). The prevalence of XRCC1R194W gene polymorphism on the other hand, was similar between the groups (p = 0.579). CONCLUSIONS: Patients with abnormal and normal cervical cytology have similar XPD gene polymorphism. However, the frequency of gene polymorphism in XRCC1 Arg 399 Gln codon was significantly higher in abnormal cervical cytology group.
