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Öğe Alteration of saliva and blood ghrelin, obestatin, leptin and weight based on adjuvant chemotherapy treatment in early-stage operated breast cancer patients(2020) Yilmaz, Nimet; Karaoglu, Aziz; Ugur, Kader; Yardim, Meltem; Aydin, SuleymanAim: To evaluate the weight change and ghrelin, obestatin and leptin levels in operated early stage breast cancer patients receiving adjuvant chemotherapy. Material and Methods: This study was conducted with 22 operated breast cancer patients (examined before and after adjuvant chemotherapy) and 33 BMI-matched two different healthy controls (of 33 healthy controls, 17 BMI-matched control was used to compare before adjuvant chemotherapy, 16 BMI-matched control was used to compare after adjuvant chemotherapy). Age, anthropometric measurements (weight, BMI, waist circumference), and blood biochemistry were recorded. Blood and salivary total ghrelin, obestatin and leptin levels are measured by using ELISA.Results: The mean ± SD weight (67.2 ± 12.3 and 72.9 ± 11.8 kg., p0.001), BMI (27.3 ± 4.7 and 29.61 ± 4.4 kg/m2, p0.001) and waist circumference (88.6 ± 10.8 and after adjuvant chemotherapy, (93.4 ± 11.0 cm., p0.05) values increased significantly when compared to pre-treatment values. Acyl ghrelin (74.05 ± 50.85 and 186.47 ± 89.61 pg/ml., p0.001 and 59.28 ± 45.74 and 151.74 ± 94.88 pg/ml., p0.01) and des-acyl ghrelin (347.59 ± 241.95 and 936.76 ± 446.93 pg/ml., p0.001 and 295.40 ± 241.44 and 765.38 ± 471.74 pg/ml., p0.01) serum levels were significantly lower in breast cancer patients compared to the control group in both pre-treatment and post-treatment periods.Conclusion: In conclusion, our study confirms that adjuvant chemotherapy causes significant weight gain in early stage breast cancer patients but does not indicate a concomitant treatment related change in ghrelin, leptin or obestatin levels. The fact that serum ghrelin levels were lower in breast cancer patients compared to BMI-matched control group, independent from treatment, might indicate that ghrelin-specific weight or adjuvant chemotherapy may be a regulatory mechanism for cancer etiopathology in breast cancer patients.Öğe An appraisal of serum preptin levels in PCOS(Elsevier Science Inc, 2011) Celik, Onder; Celik, Nilufer; Hascalik, Seyma; Sahin, Ibrahim; Aydin, Suleyman; Ozerol, ElifPlasma preptin levels were higher in women with PCOS compared with the control group (mean +/- SD, 823.2 +/- 140.7 vs. 324.9 +/- 147.3 pg/mL). This article suggests a potential role of preptin in the pathogenesis of PCOS. (Fertil Steril (R) 2011; 95:314-6. (c) 2011 by American Society for Reproductive Medicine.)Öğe Association of low maternal levels of salusins with gestational diabetes mellitus and with small-for-gestational-age fetuses(Elsevier, 2013) Celik, Ebru; Celik, Onder; Yilmaz, Ercan; Turkcuoglu, Ilgin; Karaer, Abdullah; Turhan, Ugur; Aydin, SuleymanObjectives: To evaluate maternal and cord serum concentrations of salusin-alpha and salusin-beta in women with gestational diabetes mellitus (GDM) and with small-for-gestational age (SGA) fetuses. Study design: Pregnant women with GDM (n = 25), women with SGA (n = 20) and maternal age-matched normal healthy pregnant subjects (n = 25) participated in the study. Maternal serum and cord blood salusin-alpha and salusin-beta levels at the time of birth were measured using ELISA, and their relation with metabolic parameters was also assessed. Results: Mean concentrations of maternal and fetal serum salusin-alpha in the GDM and SGA groups were significantly lower than those of the controls (P < 0.001, P < 0.001, P < 0.001 and P < 0.001, respectively). Mean concentrations of maternal and cord blood salusin-beta also decreased in both the GDM and the SGA groups in comparison to the control group (P < 0.001, P < 0.001, P < 0.001 and P < 0.001, respectively). The concentrations of maternal serum salusin-alpha and salusin-beta were strongly positively correlated with the concentrations of cord blood salusin-alpha and salusin-beta (R = 0.92, P < 0.001 and R = 0.94, P < 0.001, respectively). Conclusions: The low levels of maternal serum salusin-alpha and salusin-beta may have negative impact on metabolic disorders and vascular dysfunction. (C) 2012 Elsevier Ireland Ltd. All rights reserved.Öğe Biological rhythm of saliva ghrelin in humans(Taylor & Francis Ltd, 2006) Aydin, Suleyman; Ozercan, H. Ibrahim; Aydin, Suna; Ozkan, Yusuf; Dagli, Ferda; Oguzoncul, Ferdane; Geckil, HikmetBackground: We previously reported that ghrelin in saliva, orexigenic hormone that induces NPY release, was produced and released by salivary glands in humans. The purpose of this study was to investigate a possible circadian rhythm in saliva ghrelin concentration in human subjects as a function of time and meal. Saliva samples were collected at three-hour intervals throughout a 24-h period in 12 healthy volunteer males and ten healthy volunteer females who were provided with meals on a fixed schedule, and saliva collections were made within 15 minutes after each meal. Saliva ghrelin levels were measured by using a commercial radioimmuno assay (RIA) kit that uses I-125-labeled bioactive ghrelin as a tracer and a rabbit polyclonal antibody raised against full-length octanoylated human ghrelin. Immunohistochemical analysis of salivary glands was also performed. The results of this investigation indicated the following. (1) The saliva ghrelin level was slightly higher in female subjects in comparison with male subjects. (2) Saliva ghrelin levels were elevated before each meal and fell to trough levels after eating. (3) Saliva ghrelin levels showed a circadian rhythm that rose throughout the day to a zenith at 0300, then dropped at 0600-0900. (4) Saliva ghrelin also weakly correlated with BMI. (5) Immunohistochemical analysis showed that ghrelin was localized in the striated and excretory ducts of salivary glands of human. The present work is the first report of the circadian rhythm of saliva ghrelin level in human subjects as a function of time and meal. Meal plays an important role in lowering saliva ghrelin concentration in humans. However, present data did not exclude whether the circadian changes in saliva ghrelin expression were regulated by the biological clock or by food intake.Öğe EFFECTS OF SODIUM OCTANOATE, ACYLATED GHRELIN, AND DESACYLATED GHRELIN ON THE GROWTH OF GENETICALLY ENGINEERED ESCHERICHIA COLI(Versita, 2011) Aydin, Suleyman; Erenler, Sebnem; Kendir, YalcinAcylated ghrelin is a 28-amino acid peptide hormone bearing a fatty acid group based on octanoic acid (caprylic acid) at the serine which is located at position 3 and at the N-terminus. If this fatty acid is cleaved from acylated ghrelin, the remaining peptide is referred to as desacylated ghrelin. Free fatty acids (FFAs) can kill or inhibit the growth of bacteria. The purpose of this study was to test this ability using acylated ghrelin, desacylated ghrelin, and sodium octanoate (caprylic acid) as carbon sources for the genetically engineered Escherichia coli strains MK79 and MK57. For this experimental work, minimal medium was modified by replacing glucose with equal concentrations of acylated ghrelin, desacylated ghrelin, or sodium octanoate. Bacterial optical density, viability, alpha-amylase production, plasmid stability and pH of the growth medium were measured during these experiments. The media that allo wed most growth, based on viable cell counts and the OD600 of MK79, was minimal medium, followed by the medium containing desacylated ghrelin or acylated ghrelin, and finally the medium containing sodium octanoate. The same order was observed for MK57. Neither of the strains lost plasmids during the entire course of each experiment. There was also little change in the pH of any of the media used for both strains. These results suggest that sodium octanoate, acylated ghrelin, and desacylated ghrelin, when compared with minimal medium, inhibit Escherichia coli growth. Proliferation was lowest when sodium octanoate was used as the carbon source, followed by acylated ghrelin and desacylated ghrelin. Therefore, the acylated ghrelin found previously in human saliva might help to inhibit pathogenic micro organisms, and acylated ghrelin levels below a critical concentration in saliva could result in an increased risk of oral infection.Öğe Effects of Vitamin D on adropine and apoptosis in kidney tissue(2019) Onalan, Erhan; Demircan, Selcuk; Aydin, Suleyman; Kuloglu, Tuncay; Yalcin, Mehmet Hanifi; Gozel, Nevzat; Donder, EmirAim: This study aims to investigate the effects of vitamin D on adropin and apoptosis in rat kidney tissue in the context of the experimental diabetes model created using streptozotocin (STZ).Material and Methods: 41 male Wistar-albino breed rats of 8-10 weeks were distributed into 5 groups, which consisted of 3 groups with 7 animals each and 2 groups with 10 animals each. No treatments were applied to the control group. The Buffer group was administered with single-dose 0.1 M sodium buffer intraperitoneally (ip). The Vitamin D group was orally administered 200 IU/day vitamin D. The Diabetes group was injected ip with single-dose 50 mg/kg STZ by dissolving the material in 0.1 M sodium buffer.Results: The biochemical and histological investigations revealed similar serum TOS and TAS levels, and TUNEL positivity and Adropin immunoreactivity for the Control, Buffer, and Vitamin D groups. While TOS levels and TUNEL positivity were significantly higher in the Diabetes group compared to the Control group, TAS levels and Adropin immunoreactivity were significantly lower. The TOS levels and TUNEL positivity were significantly reduced in the Diabetes+Vitamin D group compared to the diabetic group, and TAS levels, adropin immunoreactivity were significantly higher. Conclusion: In conclusion; it was determined that experimental diabetes increased TOS and apoptotic cells and decreased TAS and adropin levels in the kidney tissue in experimental diabetes, and that Vitamin D administered as treatment decreased TOS and apoptotic cells and increased TAS and Adropin levels. It was concluded that in order to uncover the role of diabetes in the pathophysiology of its effect on kidney tissue, future studies that consider various experimental diabetes times were necessary.Öğe Lipocalin 2 as a clinical significance in rheumatoid arthritis(Termedia Publishing House Ltd, 2017) Gulkesen, Arif; Akgol, Gurkan; Poyraz, Ahmet K.; Aydin, Suleyman; Denk, Affan; Yildirim, Tulay; Kaya, ArzuAim of the study: In this study, serum lipokalin 2 (LCN-2) levels and its clinical and radiological significance in patients with rheumatoid arthritis was evaluated. Material and methods: The study enrolled 37 patients with RA and 34 healthy controls. Serum LCN-2 level was measured using ELISA method. Patients with DAS 28 scores <= 3.2, and > 3.2 were allocated into lower and high/moderate disease activity groups, respectively. Additionally patients were divided into 2 groups as early RA (disease duration <= 2 years) and established RA (duration of the disease >= 2 years). Functional disability was evaluated using Health Assessment Questionnaire (HAQ). Radiographs were scored using the modified Larsen score. Results: Serum LCN-2 (p = 0.029) levels were significantly higher in patients with RA than in the controls. Serum LCN-2 level did not correlate with laboratory and clinical parameters of disease activity like erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), DAS 28, Health Assessment Questionnaire Score (HAQ) and Nottingham Health Profile (NHP). Similarly, any correlation could not be found between structural joint damage and serum LCN2 levels. Conclusions: These results indicate that serum LCN-2 levels may be used as an indicator for structural damage like erosions in the early stage of the disease but do not able to be used to monitor disease activity.Öğe Regulatory neuropeptides (ghrelin, obestatin and nesfatin-1) levels in serum and reproductive tissues of female and male rats with fructose-induced metabolic syndrome(Churchill Livingstone, 2014) Catak, Zekiye; Aydin, Suleyman; Sahin, Ibrahim; Kuloglu, Tuncay; Aksoy, Aziz; Dagli, Adile FerdaAlthough, the exact mechanisms underlying the development of the metabolic syndrome (MetS) are not still completely understood, obesity, circulated peptide hormone levels and their interaction with genetic factors are considered largely responsible. The purpose of this study is to explore how the levels of ghrelin, obestatin (OBS) and NUCB2/nesfatin-1 (NES)/NUCB2 change in serum and the reproductive tissues of female and male rats with fructose-induced metabolic syndrome, and whether the levels of each hormone is correlated with the hormones involved with fertility. Experiments were conducted on 5-week-old Sprague-Dawley male and female rats assigned to either a control group or a MetS group. Controls were fed standard rat food and water ad libitum, while the MetS group was fed standard food with 10% (v/v) fructose solution added to their drinking water for 12 weeks with a 12/12 h photoperiod circle. Then, all animals were sacrificed after a one night fast. Peptides levels in the serum and reproductive tissues of rats were studied using the ELISA method while the immunoreactivity of reproductive system peptide hormones were shown by immunohistochemical staining method. Furthermore, the other biochemical parameters were measured using Konelab-60 equipment and infertility hormones were measured with Immulite2000. Fasting serum insulin, glucose, triglyceride, alanine aminotransferase (ALT), gamma glutamyl transpeptidase (GGT), low-density lipoprotein cholesterol (LDL-C), and total cholesterol (TC) levels were statistically significantly higher, and the amount of high density lipoprotein cholesterol (HDL-C) was significantly lower, in the MetS groups. Serum and tissue supernatant NES levels were significantly higher in the rats with MetS than the control group. Ghrelin, OBS and NES were expressed in the cytoplasm, concentrated around the apical parts of the epithelial cells in the reproductive tissues of the rats. The amounts of ghrelin were lower in the reproductive tissues of the animals with MetS, while NES levels in the same tissues increased. Obestatin also decreased, though not in the seminal glands. (C) 2014 Elsevier Ltd. All rights reserved.Öğe Serum and salivary obestatin concentrations in the diagnosis of polycystic ovary syndrome(2021) Yavuz, Adem; Aydin, Suleyman; Gurates, BilginAim: : To measure obestatin levels in the blood and saliva samples of normal-weight patients with polycystic ovary syndrome (PCOS) in comparison with normal-weight healthy controls, and to determine whether there were relationships between blood and/or salivary obestatin levels and other measured parameters.Materials and Methods: Fifteen healthy women and 15 patients with PCOS, all of which had normal weight, were included in the study. Participants’ age, height, weight, menstrual characteristics, hormone levels, body mass index, waist/hip ratio, and modified Ferriman-Gallwey (FG) scores were recorded. Obestatin levels were measured in both fasting blood and saliva samples. Homeostasis Model Assessment (HOMA-IR) was used to predict insulin resistance.Results: In the PCOS group, menstrual cycle duration and FG scores were significantly higher (P-value, 0.001, 0.001, respectively). The levels of luteinizing hormone, total testosterone and androstenedione were significantly higher in the PCOS group than in the control group (P-value, 0.001, 0.009, 0.004, respectively). In the PCOS group, blood obestatin level was 1265.2 ± 221.9 pg/ml, salivary obestatin level was 3095.33 ± 310.2 pg/ml; whereas the control group demonstrated lower levels of 939.66 ± 72.3 pg/ml and 2611.20 ± 217.1 pg/mL, respectively. However, no statistically significant difference was found between the PCOS and control groups when comparing obestatin levels in blood or saliva (P-value, 0.218, 0.369, respectively). No correlation was found between blood and salivary obestatin levels in either group. Finally, obestatin levels were not associated with any of the other measured parameters.Conclusion: Our results suggest that increased levels of obestatin, albeit in a small amount that would not be statistically significant in normal weight patients with PCOS, may have significant effects on weight control in these patients. In addition, our findings show that saliva sample can be used as an alternative to blood sample in the measurement of obestatin level in patients with PCOS.Öğe Serum levels of apelin, salusin-alpha and salusin-beta in normal pregnancy and preeclampsia(Taylor & Francis Ltd, 2012) Simsek, Yavuz; Celik, Onder; Yilmaz, Ercan; Karaer, Abdullah; Dogan, Cagdas; Aydin, Suleyman; Ozer, AliObjective: The purpose of this study was to investigate the relationship between the serum apelin, salusin-alpha and salusin-beta levels and preeclampsia. Method: Twenty-one healthy pregnant women (control group) and 48 patients with preeclampsia (study group) were included in the study between August 2010 and February 2011. Serum apelin, salusin-alpha and salusin-beta levels of the groups were compared. Results: The patients in the study group were divided into two categories: mild preeclampsia and severe preeclampsia. The mild preeclampsia group consisted of 31 patients, and the severe preeclampsia group consisted of 17 patients. Serum salusin-alpha and salusin-beta levels of the control and study groups were not significantly different (p > 0.05). Apelin levels were statistically significantly higher in the study group. No statistically significant difference was detected between the mild and severe preeclampsia groups in terms of the mean serum apelin levels. Conclusion: The serum levels of apelin were higher in the pregnant women with preeclampsia; however, there was no positive relationship between serum salusin-alpha and salusin-beta levels and the disease. Larger prospective studies are needed to validate our findings.Öğe Serum salusins levels are increased and correlated positively with cyst size in ovarian endometrioma(Taylor & Francis Ltd, 2015) Sahin, Levent; Bozkurt, Murat; Celik, Onder; Celik, Nilufer; Aydin, Suleyman; Gencdal, ServetObjectives: The objective of this study is to evaluate plasma concentrations of salusin-alpha and salusin-beta levels in women with endometrioma and non-endometriotic benign ovarian cysts. Method: Endometrioma patients (n = 14), non-endometriotic ovarian cysts (n = 14), and age-matched normal healthy fertile subjects (n = 14) participated in this study. Plasma salusin-alpha and salusin-beta levels at the time of mid-luteal phase before and 3 months after L/S cystectomy were measured using ELISA and EIA tests, and their relation with demographic parameters was also assessed. Results: The mean salusin-alpha and salusin-beta levels were significantly higher in women with endometrioma before the removal of cyst compared with cases with non-endometriotic cyst and fertile cases. Surgical removal of the endometrioma decreased the mean salusin-alpha and salusin-beta levels to the level of those with non-endometriotic cyst before and after the cystectomy and fertile women, in both unilateral and bilateral endometrioma cases. Plasma salusin-beta concentrations were found to be positively correlated with age, size of cyst, bilaterality, and salusin-alpha levels. Salusin-beta values showed no correlations to BMI and size of the ovarian cysts. Conclusions: Plasma salusin-alpha and salusin-beta levels are increased in endometrioma patients and positively correlated with endometrioma size. Laparoscopic removal of the endometrioma by stripping technique decreases the salusin levels to a similar level of fertile women.Öğe Simultaneous quantification of acylated and desacylated ghrelin in biological fluids(Wiley, 2008) Aydin, Suleyman; Karatas, Fikret; Geckil, HikmetThis study reports simultaneous quantification of both acylated and desacylated forms of ghrelin in biological samples, utilizing a reverse-phase high-performance liquid chromatography (HPLC) system. The HPLC assay was also compared with RIA assays in use. Biological samples (serum, saliva, urine, milk) known for the presence of ghrelin were collected from a total of eight post-partum women and eight male volunteers. Analysis of ghrelin with HPLC was also validated for linearity, precision, detection limit and accuracy. An elution time of 6 min was observed for pure (commercial) desacylated human ghrelin and for the same form of the hormone from all body fluids studied. The elution time for acylated pure human ghrelin and that in body fluids, however, was around 16 min. The mean recovery rate was over 90% for both forms with no significant interference. The lowest detectable levels for acylated and desacylated ghrelin with the method used here were 11 (+/- 2) and 14 (+/- 3) pg mL(-1), respectively. Given its simplicity, accuracy, time and cost-effectiveness, the HPLC method described here for determination of two forms of ghrelin (active and inactive) might prove useful for certain diagnostic purposes. Copyright (C) 2008 John Wiley & Sons, Ltd.
