Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/11727/4809
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Item Peri-Implant Crevicular Fluid And Serum Levels Of Soluble ST2 In Peri-Implant Diseases: A Pilot Study(2023) Ozgur, Engin; Topcu, Deniz Ilhan; Bayraktar, Nilufer; Alptekin, Nilgun Ozlem; https://orcid.org/0000-0002-7911-198X; https://orcid.org/0000-0002-1219-6368; https://orcid.org/0000-0002-7886-3688; https://orcid.org/0000-0003-4104-6462; 36504319; E-3717-2019; Y-8758-2018; G-1816-2014Background and ObjectiveSoluble ST2 (sST2) is a current biomarker of cardiovascular disease. It is used to predict susceptibility to cardiovascular diseases and to analyze their prognosis. Serum sST2 level increases in inflammatory diseases such as periodontitis. However, the level of sST2 in peri-implant diseases and crevicular fluid has not been investigated yet. Thus, the aim of this cross-sectional study is to analyze the level of sST2 in peri-implant health and diseases. MethodsSixty-nine participants were divided into 3 groups as peri-implant health (PH), peri-implant mucositis (PM), and peri-implantitis (P-I). Peri-implant crevicular fluid (PICF) and serum samples were collected from each participant. The levels of sST2 and IL-6 in PICF and sST2, IL-6, and CRP in serum were compared between the groups. Pocket depth (PD), modified bleeding index (mBI), modified plaque index (mPI), keratinized mucosa index (KTW), and gingival/mucosal recession (REC) were recorded as clinical parameters. Biomarkers in the serum and PICF were analyzed by ELISA kit. ResultsSixty-nine patients were included in the study. The differences in the following parameters were statistically significant between groups: age (p = .009), implant function time (p = .027), PD (p < .001), mBI (p < .001), mPI (p < .001), and KTW (p = .043). The PICF volume of P-I and PM groups were statistically higher than PH (p < .001). The amount of sST2 in P-I and PM groups were higher than PH (p = .043). Serum CRP was higher in the P-I group than in other groups (p = .034). There were no significant differences in serum sST2 (p = .247) and IL-6 (p = .110) levels between groups. ConclusionThe PICF levels of sST2 were significantly higher in PM and P-I groups compared to the healthy group. However, no significant difference was observed between the groups in terms of serum sST2 level.Item Evaluation of Dynapenia and Sarcopenia and Their Associations With Serum Insulin-Like Growth Factor-1 Levels in Renal Transplant Recipients(2022) Yildirim, Saliha; Colak, Turan; Bayraktar, Nilufer; Sezer, Siren; https://orcid.org/0000-0002-2693-1167; https://orcid.org/0000-0002-8372-7840; https://orcid.org/0000-0002-7886-3688; https://orcid.org/0000-0002-7326-8388; 34716090; AAJ-8554-2021; Y-8758-2018Objectives: Dynapenia and sarcopenia are related to increased morbidity and mortality in the general population. Chronic kidney disease (CKD) causes sarcopenia and dynapenia with different mechanisms. The aim of this study is to compare the muscle parameters in renal transplant recipients to CKD patients and patients without kidney disease and assess their associations with serum insulin-like growth factor-1 (IGF-1) levels. Method: In total, 120 renal transplant recipients (mean age: 40.4 +/- 10.5 years), 60 CKD patients (mean age: 41.9 +/- 11.4 years), and 60 control subjects with normal kidney function (mean age: 38.8 +/- 9.9 years) were enrolled. Body mass index, hand grip strength, bioelectrical impedance analysis, 6-minute walking test, and serum IGF-1 level were measured and compared between groups. Muscle parameters were evaluated according to The Foundation for the National Institutes of Health Biomarkers Consortium Sarcopenia Project criteria. Results: IGF-1 levels were highest in the renal transplantation group and lowest in the control group (P = .029). In total, 12.5% of patients in the renal transplantation group (13.3% overweight, 20% obese), 11.6% in the CKD group, and 1.6% in the control group had dynapenia (P = .015). In addition, 8.3% of patients in the CKD group, 3.3% in the renal transplantation group (50% overweight), and none of the patients in the control group had sarcopenia (P = .054). In multivariate analyses, muscle strength was associated with IGF-1 levels in renal transplant recipients (beta = 2.314, t = 3.456, P = .001). Conclusions: Serum IGF-1 is closely associated with muscle strength in renal transplant recipients. The negative effects of CKD on muscle system cannot be completely resolved with renal transplantation. Sarcopenic obesity and dynapenic obesity need special attention and therefore body mass index cannot be used as the only parameter to evaluate frailty in renal transplant recipients. (C) 2021 by the National Kidney Foundation, Inc. All rights reserved.Item Protective Effects of Oral Lactobacillus rhamnosus on Liver Steatosis in Rats on High-Fat Diet(2021) Ozbek, Sevan Cetin; Saka, Mendane; Turhan, Nesrin; Istar, Elven Hortac; Mirza, Cenk; Bayraktar, Nilufer; Ok, Mehtap AkcilThe purpose of this study was to investigate the effect of probiotic on fatty liver and metabolic endotoxemia in rats on high-fat diet. The rats were divided into three groups and fed one of the three diets (standard or control diet, high-fat diet, or high-fat + probiotic diet) for 16 weeks. At the end of this period, blood samples of the rats were taken and the liver tissue was removed for histopathology. There was an increase in the activities of both aspartate aminotransferase and alanine aminotransferase in the livers of rats on high-fat diet. However, only the rise in aspartate aminotransferase was blunted by incorporation of probiotics to the high-fat diet. Histopathological examination revealed 62.5% hepatosteatosis in high fat diet group and 12.5% in high-fat + probiotic diet group. In conclusion, the protective effect of probiotic supplement on liver steatosis caused by high-fat diet was histopathologically demonstrated; however, its effect on liver enzymes, inflammatory markers, and metabolic endotoxin was not observed. There is a need for further studies in terms of both dose and strain to recommend the use of probiotics in nonalcoholic fatty liver disease.Item Differences in Antibody Responses Between an Inactivated SARS-CoV-2 Vaccine and the BNT162b2 mRNA Vaccine in Solid-Organ Transplant Recipients(2021) Erol, Cigdem; Yalcin, Tugba Yanik; Sari, Nuran; Bayraktar, Nilufer; Soy, Ebru Ayvazoglu; Colak, Meric Yavuz; Azap, Ozlem; Arslan, Hande; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0002-2535-2534; 0000-0002-0993-9917; 0000-0002-5708-7915; 0000-0001-5996-8639; 0000-0002-3165-4520; 34951350; AAJ-1219-2021; AAC-5566-2019; AAJ-8097-2021; ABG-7034-2021; AAA-4708-2022Objectives: Vaccination against SARS-CoV-2 may reduce COVID-19 mortality and complications in solidorgan transplant recipients, and we evaluated the associated antibody responses and adverse effects in this high-risk population. Materials and Methods: This prospective observational study (April-June 2021) included 10 liver and 38 kidney transplant recipients who received 2 vaccine doses (Sinovac, n = 31; or BioNTech, n = 17) and 56 healthy adults (Sinovac), all of whom provided 3 blood samples (prevaccination, 4 weeks after first dose, and 4-6 weeks after second dose) for quantitative tests (Abbott Quant assay for immunoglobulin G antibodies against SARS-CoV-2 spike protein). Type I error was alpha = .05 in all statistical analyses (SPSS, version 25). Results: We analyzed demographic data, antibody responses, and adverse events after 2 doses of SARS-CoV-2 vaccine, compared immune responses from solidorgan transplant recipients (median age, 36.5 years) versus healthy patients (median age, 37.5 years), and observed significantly higher seropositivity in healthy versus transplant patients after Sinovac vaccination (100% vs 67.5%; P = .001). However, we observed no significant seropositive differences for Sinovac versus BioNTech second doses in transplant recipients. Median SARS-CoV-2 immunoglobulin G level after second dose was significantly higher in BioNTech (1388.6 AU/mL) versus Sinovac patients (136.6 AU/mL) (P = .012). The seropositivity difference between the 2 vaccines was significant in participants 24 to 44 years old (P = .040). The rate of at least 1 side effect was 82.4% (n = 14) for BioNTech vaccine and 32.3% (n = 10) for Sinovac vaccine, and the difference was statistically significant. The most common side effect was arm pain (significantly higher in BioNTech group). Conclusions: Solid-organ transplant recipients demonstrated inadequate vaccine responses (higher risk of complications and mortality) versus healthy patients. Furthermore, immune responses may differ between vaccines. Therefore, additional vaccine doses and strict control measures remain crucial.Item Efficacy of Acupuncture on Pain Mechanisms, Inflammatory Responses, and Wound Healing in the Acute Phase of Major Burns: An Experimental Study on Rats(2021) Abali, Ayse Ebru; Cabioglu, Tugrul; Bayraktar, Nilufer; Ozdemir, Binnaz Handan; Moray, Gokhan; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0002-1298-7944; 34309681; AAJ-8097-2021; AAE-8704-2021We investigated acupuncture, a potential contributor for burn care, on physiological and pathological pain mechanisms and systemic and local inflammatory responses in a rat experimental burn model. Forty male Sprague-Dawley rats were divided into two groups. One-hour groups (five rats/group) were observed for 1 hour and included Sh1 (sham/observation), ShA1 (sham + acupuncture/observation), Brn1 (burn/observation), and BrnA1 (burn + acupuncture/ observation). Seven-day groups (five rats/group) were observed for 7 days and included Sh7 (sham/observation), ShA7 (sham + acupuncture/observation), Brn7 (burn/observation), and BrnA7 (burn + acupuncture/observation). "Pain-distress scores" were noted daily, and acupuncture was repeated within every wound-dressing change on alternate days. After observation periods, blood samples for interleukin 6 and beta-endorphin and skin biopsies for inflammatory changes and immunohistochemical staining of interleukin 6 were collected for analysis(P <.05). In 1-hour groups, interleukin 6 accumulation in burn wounds of BrnA1 was less than Brn1, with Brn1 having the highest mean blood level (P <.05). Mean beta-endorphin levels were higher in ShA1, Brn1, and BrnA1 than in Sh1 (P <.05). In all 7-day groups, the agonizing period was 48 to 72 hours after burn, with Brn7 most affected (P <.05). Microvessels were multiplied in the Brn7 group, with significantly higher numbers in burn wounds of BrnA7 (P<.05). Burn wounds of BrnA7 had less accumulation of interleukin 6 than Brn7 with the Brn7 group having the highest mean blood level and Sh7, ShA7, and BrnA7 having similarly low levels (P>.05). Beta-endorphin levels in ShA7, Brn7, and BrnA7 were lower than in Sh7 (P <.05). Acupuncture contributed to the management of physiological and pathological pain, modulation of inflammatory responses, and associated enhancement of angiogenesis in the acute phase of burn injury in rats.Item Maternal and cord blood homocysteine, vitamin B12, folate, and B-type natriuretic peptide levels at term for predicting congenital heart disease of the neonate: A case-control study(2019) Sahin-Uysal, Nihal; GUlumser, Cagri; Kocaman, Eda; Varan, Birgul; Bayraktar, Nilufer; Yanik, Filiz; 0000-0001-5385-5502; 0000-0002-7886-3688; 0000-0002-1741-7035; 0000-0002-4066-9038; 31256695; AAA-9475-2020; Y-8758-2018; C-6543-2018Objective: To investigate the effectiveness of the metabolic markers homocysteine, vitamin B12, folate, and B-type natriuretic peptide in maternal and cord blood for detecting congenital heart disease. Methods: Homocysteine, vitamin B12, folate, and B-type natriuretic peptide concentrations in maternal and cord blood samples at term were measured in the case (n = 42) and control (n = 43) groups with and without fetal congenital heart disease, respectively. Additionally, newborns with congenital heart disease were divided into two subgroups: those with (n = 30) and without (n = 8) 6-month infant survival. The case and control groups and case subgroups were compared with each other with respect to maternal age, gravidity, parity, gestational age at delivery, birth weight, maternal and cord blood levels of homocysteine, vitamin B12, folate, and B-type natriuretic peptide, and arterial cord blood pH and base excess values. Statistical analyses were performed using SPSS for Windows, version 22.0. The Student's t-test, the Mann-Whitney U test, and the chi(2) test were used where appropriate. A p value of < .05 was considered statistically significant. Results: Mean maternal age, birth weight and median gravidity, parity and gestational age at delivery were not significantly different between the case and control groups, as well as between the case subgroups (all p > .05). Concentrations of metabolic markers in maternal blood were not significantly different between the two groups (p > .05). Homocysteine and B-type natriuretic peptide levels in cord blood samples were significantly higher, whereas folate levels were significantly lower in the case group compared with the control group (all p < .05). Cord blood B-type natriuretic peptide levels were significantly higher (p < .05) and arterial cord blood pH values were significantly lower (p < .05) in the case subgroup without 6-month infant survival compared with the case subgroup with 6-month infant survival. Conclusion: High cord blood B-type natriuretic peptide and homocysteine levels and low cord blood folate levels at term may be useful for predicting congenital heart disease in the neonate. Neonates with congenital heart disease who have high cord blood B-type natriuretic peptide and low pH values may have adverse outcomes.Item Effect of weight loss diets on biochemical parameters and anthropometric measurements in prolactinoma patients(2019) Yesil, Esen; Kiziltan, Gul; Anil, Cuneyd; Ok, Mehtap Akcil; Bayraktar, Nilufer; AAZ-8170-2020Background: The aims of this study were to determine the effect of weight loss on biochemical parameters and anthropometric measurements in prolactinoma patients and to evaluate the effectiveness of weight loss diet along with medical treatment. Methods: Twenty-two patients with prolactinoma were divided into two groups and one of the groups was applied weight loss diet (diet group) while the other group was diet free (control group). Each participant was interviewed using a structured questionnaire. The biochemical parameters (fasting plasma glucose, fasting plasma insulin, prolactin, leptin, TSH, T4, cortisol, HbA1c, AST, ALT and blood lipids) of participants were analyzed and anthropometric measurements were taken. Results: There was a significant change in mean BMI after treatment in diet group (p=0.000). The mean level of serum prolactin decreased from 45.1 +/- 31.63 ng/dL at baseline to 12.6 +/- 8.19 ng/dL after three months in diet group (p=0.006). Despite there being no statistically significant difference between diet and control group in terms of baseline level of prolactin measurement (p=0.800), statistically significant difference between the two groups in terms of final level of prolactin measurement (p=0.027) was observed. There was a significant change in mean level of leptin after treatment in diet group (p=0.001). Conclusions: In addition to medical treatment, weight loss diets sped up the healing process for hyperprolactinemia and the reduction in body weight had positive effects on the metabolic profiles of prolactinoma patients.