Sağlık Bilimleri Fakültesi

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Citation - WoS: 26
Citation - Scopus: 28
1-(2-Hydroxyethyl)-2-imidazolidinone as corrosion inhibitor of mild steel in 0.5 M HCl solution: thermodynamic, electrochemical and theoretical studies
(Journal of Adhesion Science and Technology, 2019) Keleşoğlu, Ayşen; Yıldız, Reşit; Dehri, İlyas
The inhibition effect of 1-(2-Hydroxyethyl)-2-imidazolidinone (2-HEI) on mild steel (MS) corrosion in 0.5M HCl solution was investigated at different inhibitor concentration and temperature by electrochemical experiments, such as linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and quantum chemical calculations. The inhibitor adsorption process on mild steel in 0.5M HCl system was studied at different temperatures (20 C–50 C). Furthermore, the surface morphology of MS was also investigated with SEM in the absence and the presence of inhibitor. The adsorption of 1-(2-Hydroxyethyl)-2-imidazolidinone on MS surface is an exothermic process and this process obeys the Langmuir adsorption isotherm. The Quantum chemical findings are good agreed with the empirical data.
Citation - WoS: 59
Citation - Scopus: 63
Adsorption and inhibition effect of 2,4-diamino-6-hydroxypyrimidine for mild steel corrosion in HCl medium: experimental and theoretical investigation
(SPRINGER HEIDELBERG, 2019) Yildiz, Resit
2,4-Diamino-6-hydroxypyrimidine (2D6H) was examined as corrosion inhibitor of mild steel (MS) in 0.1M HCl using potentiodynamic measurements, linear polarization resistance (LPR), scanning electron microscopy, electrochemical experiments, and quantum chemical calculations. All measurements show that the corrosion inhibition effectiveness is forthright compared to the concentration of 2D6H ranging from 0.5 to 10.0mM. Adsorption of 2D6H on the MS surface in the presence of HCl is determined to obey Langmuir adsorption isotherm. The electronic features elucidated by quantum chemical calculations were associated with the experimental inhibition productivities. The mechanism of inhibition was revealed by E-pzc measurements.
Citation - WoS: 18
Citation - Scopus: 16
Alpha-lipoic acid may ameliorate testicular damage by targeting dox-induced altered antioxidant parameters, mitofusin-2 and apoptotic gene expression
(Andrologia, 2021) Güzel, Elif Erdem; Kaya Tektemur, Nalan; Tektemur, Ahmet
In the study, the ameliorating effects of alfa lipoic acid (ALA) against doxorubicin-induced testicular apoptosis, oxidative stress and disrupted mitochondrial fusion were investigated in male rats. Rats were divided into four groups as control, doxorubicin (DOX), DOX + ALA and ALA. A single dose of 15 mg/kg DOX was administered i.p to the DOX and DOX + ALA groups. 50 mg/kg ALA was given to the DOX + ALA and ALA groups by oral gavage every other day. After 28 days, rat testes and serum samples were collected and analysed. Administration of DOX alone caused a decrease in body and relative testicular weights, seminiferous tubule diameter and germinal epithelium thickness, Johnsen's score and serum testosterone levels. DOX treatment led to severe testicular damage such as tubular degeneration, and atrophic tubules. Also, the activities of superoxide dismutase and glutathione peroxidase were reduced, while the level of malondialdehyde was increased in the testis. The mRNA levels of apoptotic-related genes (CASP3, TP53, BAX, BCL2) and apoptotic index were increased, while mitofusin-2 decreased. DOX caused an increase in CASP3 and a decrease in mitofusin-2 immunoreactivities. Treatment with ALA markedly improved all of DOX-induced biochemical, histochemical and molecular alterations in rat testis. Consequently, ALA has a therapeutic role in ameliorating DOX-induced testicular damage in rats.
Citation - WoS: 10
Citation - Scopus: 14
The antioxidant and anti-apoptotic potential of Pleurotus eryngii extract and its chitosan-loaded nanoparticles against doxorubicin-induced testicular toxicity in male rats
(Wiley, 2021) Erdem Güzel, Elif; Kaya Tektemur, Nalan; Tektemur, Ahmet; Acay, Hilal; Yıldırım, Ayfer
This study was conducted to evaluate the protective role of Pleurotus eryngii extract (PE) and Pleurotus eryngii extract-loaded chitosan nanoparticles (PE-CSNP) against doxorubicin (DOX)-induced testicular toxicity in rats. Male rats were divided into six groups: control (DMSO/ethanol), PE (200 mg/kg PE), PE-CSNP (30 mg/kg PECSNP), DOX (10 mg/kg DOX, a single dose, i.p), DOX+PE (10 mg/kg DOX+200 mg/ kg PE) and DOX+PE-CSNP (10 mg/kg DOX+30 mg/kg PE-CSNP). PE and PE-CSNP were administered by oral gavage every other day for 21 days. DOX-treated rats showed histopathological impairment compared with the control group. There was an increase in the apoptotic index, caspase 3 (CASP3), BCL2-associated X apoptosis regulator (BAX), dynamin-related protein 1 (DRP1) expression and total oxidative status (TOS) in the DOX group, while mitofusin-2 (MFN2), total antioxidative status (TAS) and serum testosterone levels of the DOX group reduced when compared with the other groups. PE and PE-CSNP treatments provided significant protection against DOX-induced oxidative stress by reducing TOS levels and increasing TAS levels. CASP3, BAX, apoptotic index and DRP1-MFN2 expressions were restored by PE and PE-CSNP. However, the PE-CSNP showed higher antioxidant and anti-apoptotic efficacy compared with PE. Thus, our results provide evidence that CSNP and PE could synergistically have a potent antioxidant and anti-apoptotic therapy against DOX-induced testicular damage in male rats.
Citation - WoS: 10
Citation - Scopus: 10
Awareness of risk factors and warning signs of stroke among caregivers of patient with and not with stroke: Results from questionnaire
(Journal of Pakistan Medical Association, 2019) Usta Yeşilbalkan, Öznur; Karadakovan, Ayfer; Vural Doğru, Birgül; Akman, Perihan; Özel, Ebru; Bozkurt, Yücel
Objective: To assess the awareness/knowledge of stroke risk factors and warning signs among caregivers of patients with or without stroke. Methods: The cross-sectional, descriptive and comparative study was conducted in the neurology clinic and polyclinic of a university hospital in Izmir, Turkey, from March to July 2014, and comprised primary caregivers of patients with stroke in group 1 and those of patients with no stroke in group 2. The subjects were screened and data was collected using the Participant Information Form and the Questionnaire Form About Stroke. Warning signs and symptoms of stroke were compared between the two sets of caregivers. SPSS 17was used for data analysis. Results: Of the 203 respondents, 105(52%) were in group 1 and 98(48%) in group 2. Group 1 had better awareness than group 2 (p<0.05). In group 1, weakness was the most commonly recognised warning sign 101(96.2%), whereas dyspnoea 41(39%), was the least commonly identified. There was no relationship of stroke knowledge with educational level and age (p>0.05 each). Conclusions: Caregivers had a moderate knowledge of some of the warning signs and risk factors about stroke.
Citation - WoS: 7
Citation - Scopus: 7
Biochemical components, enzyme inhibitory, antioxidant and antimicrobial activities in endemic plant Scilla mesopotamica speta
(Wiley, 2021) Aktepe, Necmettin; Keskin, Cumali; Baran, Ayşe; Atalar, Mehmet Nuri; Baran, Mehmet Fırat; Akmeşe, Şükrü
In this study, in vitro antioxidant, antimicrobial, anticholinesterase and phenolic profile of different solvent extracts of Scilla mesopotamica speta were determined in detail. In vitro antioxidant activities and total phenolic and flavonoid contents of plant extracts obtained with different solvents were tested in terms of 2.2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activities. The highest total phenolic and total flavonoid contents were determined in the ethyl acetate extract (62.24 mu g GAE/mg) and chloroform extract (87.72 mu g QE/mg) respectively. The highest DPPH radical scavenging activity was detected in ethyl acetate extracts. Antimicrobial and antifungal activities were investigated by MIC method. The inhibitory activities of the extracts on the acetyl cholinesterase enzyme were investigated. Liquid chromatography (LC) tandem mass spectrometry LC-MS/MS was used to determine the phenolic component content of extracts. Thirty-one different components were identified in the analyses and their amounts were measured. Practical applications Scilla mesopotamica speta is an endemic and medicinal plant. It was determined that the extracts of this plant had a very rich content in terms of phenolic compounds, especially caffeic and ferulic acids. However, this plant was remarkable for its antioxidant, anticholinesterase, and antimicrobial activities. Considering the strong antioxidant, antimicrobial, and enzyme inhibition activities of the Scilla mesopotamica speta it can be suggested as a source of anticancer, antimicrobial, and antiviral drugs.
Citation - WoS: 1
Citation - Scopus: 1
Black box in overactive bladder: Central sensitization and its relationship with urinary symptom severity and quality of life
(Wiley, 2024) Toprak Şelenay, Ceyda; Altay, Hafize; Bülbül, Saliha Beste; Oskay, Kemal
Aim: To examine central sensitization (CS), and to investigate the relationship between CS, and urinary symptom severity, and quality of life (QoL) in women with overactive bladder (OAB). Materials and methods: A total of 144 women with OAB included the study. CS with the Central Sensitization Inventory (CSI), urinary symptom with the Overactive Bladder Questionnaire-Version 8 (OAB-V8), bladder diary and Patients' Perception of Intensity of Urgency Scale (PPIUS) and QoL with the King's Health Questionnaire (KHQ) were assessed. Results: It was found that 47.9% (n = 69) of women with OAB had CS. It was observed that the CSI score was related to the OAB-V8 score (ρ = 0.327; p < 0.001) and the average number of voids/day (ρ = 0.291; p < 0.001). Additionally, urgency severity was higher in women with OAB with CS than in women with OAB without CS (p = 0.006). There was a relationship between the CSI score and KHQ-incontinence impact (ρ = 0.250; p = 0.012), KHQ-personal relationship (ρ = 0.253; p = 0.002), KHQ-sleep/energy (ρ = 0.180; p = 0.031), KHQ-emotional state (ρ = 0.310; p < 0.001) and KHQ-severity measurement scores (ρ = 0.391; p < 0.001). Conclusion: In this study, it was observed that the majority of women with OAB had CS. It was found that more severe symptoms of CS were associated with worse urinary symptom severity and QoL in these patients. It may be beneficial to evaluate CS in the management of OAB and to consider CS when determining treatment strategies.
Citation - WoS: 10
Citation - Scopus: 12
Carbamazepine-induced renal toxicity may be associated with oxidative stress and apoptosis in male rat
(Taylor & Francis Online, 2021) Erdem Güzel, Elif; Kaya Tektemur, Nalan; Tektemur, Ahmet; Etem Önalan, Ebru
Carbamazepine (CBZ) is the antiepileptic drug used in epilepsy and some psychiatric disorders. Besides its widely used, many adverse effects have been reported including hematotoxicity, hepatotoxicity, endocrine disorders, and testicular damages due to oxidative stress. However, the role of CBZ on renal toxicity is not fully known. In this study, we attempted to explain the connected mechanisms by focusing on the metabolism of CBZ-induced renal toxicity in rats. Twenty male Wistar-Albino rats were randomized into 2 groups (n = 10); control (1 mL/day distilled water, orally) and CBZ (25 mg/kg/day CBZ, orally) groups. After 60 days, TAS (total oxidant status) and TOS (total oxidant status) levels, histopathological features, some genes involved in apoptosis, 8-hydroxy-2-deoxyguanosine (8-OHdG) activity, and apoptotic cells were assessed of kidney tissue. The oxidative stress index (OSI) was measured from TAS and TOS levels. TOS levels and OSI significantly increased, while TAS levels decreased in the CBZ group relative to the control group. Histopathological observations, Caspase-3 (Casp3), Poly [ADP-ribose] polymerase-1 (PARP-1), 8-OHdG immunoreactivities, and apoptotic cells markedly raised in the CBZ group compared with the control group. Also, mRNA expression of Cytochrome c (Cytc) and CASP3 significantly increased in the CBZ group compared to the control group. In conclusion, long-term use of CBZ may promote renal damage in rats by inducing oxidative stress and apoptosis.
Citation - WoS: 4
Citation - Scopus: 6
The combination of N-acetylcysteine and cyclosporin A reduces acetaminophen-induced hepatotoxicity in mice
(Ultrastructural Pathology, 2021) Erdem Güzel, Elif; Kaya Tektemur, Nalan; Gül, Mehmet; Tektemur; Özcan Yıldırım, Sena; Kavak Balgetir, Merve; Ozan Kocamüftüoğlu, Gonca; Yalçın, Tuba; Ozan, & İbrahim Enver
Acetaminophen (APAP)-induced hepatotoxicity is the most common cause of acute liver failure in worldwide. N-acetyl cysteine (NAC) is used as the APAP antidote. Cyclosporin A (CsA) is suppressed mitochondrial damage by binding cyclophilin, a mitochondrial pore transport component. The study aimed to evaluate the effects of NAC, CsA, and NAC+CsA treatments on APAP-induced hepatotoxicity in mice. Mice were randomly divided into five groups (n = 6). 400 mg/kg/ip/single dose APAP, 1200 mg/kg/i.p/single dose NAC and 50 mg/kg/i.p/single dose CsA were performed. Light and electron microscopic alterations were investigated in liver samples. Levels of serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) and liver glutathione (GSH) were analyzed. 3-nitrotyrosine and cytochrome c immunoreactivities were evaluated in liver tissue. Here, we found that APAP leads to histopathological and ultrastructural changes in mice liver. Also, APAP increased cytochrome c and 3-nitrotyrosine immunopositive staining. Besides, a significant decrease in liver GSH and an increase in serum AST and ALT levels were detected in the APAP group. Interestingly, NAC+CsA treatment improved histological alterations, cytochrome c, and 3-nitrotyrosine immunoreactivities and liver GSH, serum AST/ALT levels caused by APAP. We suggest that the combination of NAC and CsA reduces acetaminophen-induced hepatotoxicity in mice.
Citation - WoS: 1
Citation - Scopus: 2
Comparative Study of Lipid and Fatty Acid Profile in Liver Tissues of Male and Female Silurus triostegus During the Catching Seasons
(2021) Kaçar, Semra; Başhan, Mehmet
In this study, seasonal variations of total fatty acid (FA), phospholipid (PL) and triacylglycerol (TAG) compositions in liver tissues of catfish (Silurus triostegus) were investigated. Samples of S. triostegus were obtained from Atatürk Dam Lake, Turkey, in two month periods during one year as from May. The major components were palmitic acid (16:0), stearic acid (18:0), oleic acid (18:1n-9), palmi toleic acid (16:1n-7), docosahexaenoic acid (DHA, 22:6n-3) and arachidonic acid (AA, 20:4n-6) in total lipid, 16:0, 18:0, 18:1n-9, eicosapentaenoic acid (EPA, 20:5n-3), DHA and AA in PL, 16:0, 16:1n7, 18:1n-9, linoleic acid (LA, 18:2n-6), AA, EPA, DHA and docosapentaenoic acid (22:5n-3) in TAG extracted from the liver of S. triostegus in all seasons. N-3/n-6 ratio was found 2.00-2.61 in females, 1.15-2.75 in males in total lipid. The highest lipid content was found in May (2.39%) in the females. In the males, the highest level was found in September (2.91%). In TAG fraction, the component with the lowest ratio in both sexes’ TAG is PUFA. In PL fraction, SFA, MUFA, and PUFA percentages were found at similar rates in both sexes in all months.
Citation - WoS: 3
Citation - Scopus: 4
Determination of Chemical Composition and Antioxidant, Cytotoxic, Antimicrobial, and Enzyme Inhibition Activities of Rumex Acetosella L. Plant Extract
(Springer int Publ AG, 2024) Kandemir, Sevgi Irtegun; Aktepe, Necmettin; Baran, Ayse; Baran, Mehmet Firat; Atalar, Mehmet Nuri; Keskin, Cumali; Khalilov, Rovshan
Purpose The phenolic composition, antioxidant, antimicrobial activity, enzyme inhibition activity, and cytotoxic activity potentials of the plant Rumex acetosella L. (R. acetosella) were examined in this study. Materials and Methods: The chemical composition of R. acetosella methanol extract was identified by the LC-MS/MS method. The antioxidant activity was tested using beta-carotene/linoleic acid, DPPH free radical scavenging, ABTS cation radical scavenging, CUPRAC reducing power, and metal chelating activity methods. The cytotoxic activity was determined by the MTT assay using human ovarian adenocarcinoma (Skov-3), glioblastoma (U87), human dermal fibroblasts (HDF), and human colorectal adenocarcinoma (CaCo-2) cell lines. The antimicrobial activity of methanolic extracts was tested on gram-negative (Escherichia coli and Pseudomonas aeuriginosa) and gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) using the in vitro minimum inhibition concentration method (MIC). Enzyme inhibition activity of R. acetosella methanol extract was measured spectrophotometrically against acetylcholinesterase (AChE) and glutathione S-transferase (GST) enzymes. Results: The findings showed that the major components of the methanol extract content were luteolin-7-O-glucoside (1.599 m/L), polydatin (91,024 m/L), and shikimic acid (0.773 m/L). It was determined that the extract and standard antioxidant (a-tocopherol) results in DPPH center dot, and ABTS center dot + tests performed to determine the antioxidant activity were close to each other, and this value was more effective than the standard antioxidant (alpha-tocopherol) in the CUPRAC test. These results suggested that the plant's antioxidant potential was higher when compared with reference antioxidant compounds. It was determined that the methanol extract of R. acetosella had a weaker effect on the growth of the tested microorganisms than the antibiotics used as standard. The activity of the GST and AChE enzymes was found to be severely inhibited by the methanol extract of R. acetosella. Conclusion: Based on these findings, R. acetosella L. is a medicinal and commercially beneficial plant that warrants further investigation.
Citation - WoS: 2
Citation - Scopus: 3
Effect of Auricular Acupressure in Management of Constipation in Palliative Care Patients
(Sage Journals Home, 2023) Bıçak Ayık, Derya; Can, Gülbeyaz
Objectives: This experimental randomized-controlled study was performed to define the efficacy of auricular acupressure (AA) in the management of constipation developing in palliative care patients. Methods: According to the pre-prepared randomization list, 44 patients were included in the experimental group and 46 patients were included in the control group. Routine clinical treatment and care implementation were maintained in the patients in both groups. AA was performed for 4 weeks in patients in the experimental group. During the study, to determine the complaints of the patients regarding constipation, the information in the daily patient chart was examined at least 5 times by interviewing with the patient/patient's relative in the clinic and/or via phone call, and the results were recorded in the patient chart and data collection forms. The independent variable of the study is AA application, and the dependent variables are constipation and quality of life. Results: It was determined that there was no statistically significant difference between the daily defecation frequency of the 2 groups during the first 11 days. However, after the 12th day, the daily stool frequency of the experimental group was higher compared to the control group and this difference obtained between the 2 groups was statistically significantly different. AA was effective in decreasing laxative use. Conclusion: This intervention increased stool frequency, reduced physical and psychosocial symptoms, anxieties, and improved stool satisfaction and it was an effective approach to improving the quality of life. It is recommended that the daily use of AA should be evaluated. The healthcare providers including nurses, patients, and patient relatives should be trained regarding AA.
Citation - WoS: 1
Citation - Scopus: 1
The Effect of Frailty Levels of Older Individuals on Their Mental Well-Being and Depression Levels
(Wiley, 2024) Isik, Kevser; Ayik, Derya Bicak; Cengiz, Zeliha
Background: Frailty has become an important public health issue. This study was conducted to determine the effect of frailty levels of older individuals on their mental well-being and depression levels. Methods: This descriptive cross-sectional study was conducted with a total of 325 older individuals aged 60 years and over. A demographic questionnaire form, the FRAIL Frailty Scale, the Warwick-Edinburgh Mental Well-Being Scale, and the Geriatric Depression Scale-Short Form were used to collect data. Data were evaluated using the SPSS 25.0 package program. Number, percentage, mean, standard deviation, Chi-square, correlation, and multiple regression analyses were used. Results: The mean age of the older individuals was 69.56 +/- 7.75 years, and the variables of age, education level, income status, the person they were living with, regular medication use, forgetting to take medication, urinary incontinence, hospitalisation, and accidents were found to affect both frailty and depression (P < 0.05). There was a positive correlation between frailty and depression (r: 0.460, P < 0.001) and a negative correlation between mental frailty and well-being (r: -0.391, P < 0.001). Socio-demographic variables, depression, and mental well-being had a 40% effect on frailty (P < 0.001). Conclusion: Depression status and mental well-being level are related to frailty, so negativity in one of them negatively affects the other. In line with these results, it is recommended to determine the level of depression and mental well-being of older individuals with high risk of frailty, and according to the results of the research, to provide care and support regarding the predictors affecting frailty.
Citation - WoS: 2
Citation - Scopus: 1
Effects of Ketamine on Penile Tissues in an Experimental Priapism Model in Rats
(Turkish Assoc Trauma Emergency Surgery, 2024) Gevrek, Fikret; Fırat, Fatih; Unsal, Velid; Tapar, Hakan; Karaman, Tugba; Karaman, Serkan; Yalçın, Kenan
BACKGROUND: This study aimed to evaluate the histopathological and biochemical effects of ketamine on penile tissues following ischemia-reperfusion injury induced by priapism. METHODS: Twenty-four male rats were randomized into three groups. Group 1 served as the control group. Group 2 underwent the priapism model to induce ischemia-reperfusion injury. Group 3, the treatment group, experienced a similar ischemia-reperfusion model as Group 2; additionally, 50 mg/kg of ketamine was administered intraperitoneally just before reperfusion. Blood biochemical analyses and penile histopathological evaluations were performed. RESULTS: In Group 3, significant improvements were observed in all histopathological scores, including desquamation, edema, inflammation, and vasocongestion compared to Group 2 (p<0.001). Blood biochemical analyses showed that the malondialdehyde (MDA) levels were recorded as 10 in Group 2, with a significant decrease in Group 3 (p=0.013). Similarly, proinflammatory cytokine levels, including interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α), were found to be suppressed in Group 3 compared to Group 2 (p=0.003, p=0.022, and p=0.028, respectively). Antioxidant enzyme activities, such as glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), were higher in Group 3 compared to Group 2 (p=0.016 and p=0.024, respec- tively). CONCLUSION: Ketamine is an effective anesthetic agent in alleviating the effects of penile ischemia-reperfusion injury.
Effects of Maternal Tobacco Smoke or Alpha Lipoic Acid on Puberty Onset, Estrous Cycle and Gonadotropin Levels in Female Rats
(KARGER, 2018) Ülker, Nazife; Yardimcı, Ahmet; Kaya, Nihat; Tektemur, Ahmet; Akkoç, Ramazan Fazıl; Erdem Güzel, Elif; Canpolat, Sinan; Ozan, Enver
Various environmental factors are known to affect puberty onset. However, there are few studies in literature about how maternal tobacco smoke (ts) or alpha lipoic acid (ala) affect the hypothalamus-pituitary-gonadal axis at peripheral or central levels in rats. This study aimed to investigate effects of maternal tobacco smoke or alpha lipoic acid on puberty onset, estrous cycle and serum gonadotropin levels in female rats. Adult female spraque-dawley rats were used. All animals were randomly divided into 4 groups (control, ts, ts+ala and ala) and each group consisted of 7 rats. All ts rats were exposed to ts (20 gram\day, for one hour twice a day) and all ala rats received daily oral ala (20 mg/kg) during 8 week. Afterwards all rats were impregnated, ts or ala treatments continued during pregnancy. All treatments ended with birth and later newborn female rats were selected for each group (n=7). Puberty onset was monitored by examination of vaginal opening in female rat pups. Subsequently, estrous cycle was conducted daily for 15 days and determined by examination of the vaginal smear cytology. Also, serum fsh and lh levels were measured using elisa method at the end of the experiment. There was significantly advanced on puberty onset day for ts group (p<0.05). There was a significantly increase in pubertal weight in ala group compared to control group (p<0.001). The mean total number of estrous cycles and average duration of metestrus, diestrus, proestrus or estrus phases were not significantly different in all treatments groups compared to control group. There was no any significant change in serum fsh levels, but serum lh levels were significantly increased in all treatment groups compared to control group (p<0.05). Present study showed that maternal tobacco smoke or alpha lipoic acid may affect hypothalamus-pituitary-gonadal axis differently in rats.
Citation - WoS: 3
Citation - Scopus: 2
The effects of oxytocin on penile tissues in experimental priapism model in rats
(SPRINGER, 2019) Kolukçu, Engin; Kılıç, Şahin; Parlaktaş, Bekir Süha; Erdemir, Fikret; Ünsal, Velid; Atılgan, Doğan; Uluocak, Nihat
PurposeThis study aimed to demonstrate the effects of oxytocin on penile tissues in ischemia-reperfusion injury developed after priapism.MethodsForty Wistar Albino strain male rats were divided into four groups. The control group (n=10) was not intervened. In Group 2, a rat model of priapism was constructed and maintained for 1 h. In Group 3, reperfusion was ensured for 30min following priapism. Rats in Group 4 rats were given oxytocin 30min before the induction of reperfusion following priapism. All rats were penectomized, and adequate amounts of blood sample were drawn. Inflammation, vasocongestion, desquamation, and edema in penile tissue were scored between 0 and 3 points (0: normal, 1: mild, 2: moderate, 3: severe) to evaluate the severity of tissue damage. The activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and the levels of malondialdehyde (MDA), and nitric oxide (NO) in blood samples were determined spectrophotometrically.ResultsIn histopathological examination, statistically significant positive changes were detected in vasocongestion, inflammation, desquamation, and edema scores in Group 4 than in Group 2 and Group 3 (p<0.001). Biochemical test results revealed that NO levels were significantly lower in Group 4 than in Group 3 (p<0.001). Serum GSH-Px activities in Group 4 significantly increased when compared with the other groups 2 and 3 (p=0.002, p=0.001, respectively). There was no statistical difference among the groups regarding SOD activities and MDA levels (p>0.05).ConclusionsOxytocin protected against priapism-induced ischemia-reperfusion injury developed in cavernosal tissue as observed based on histopathological and biochemical evidence. Although this is an experimental study, oxytocin can be thought as an alternative drug in the treatment of priapism.
Citation - WoS: 2
Citation - Scopus: 2
Effects of spinal stabilization exercises focusing on the pelvic floor in women with overactive bladder
(Springer, 2023) Toprak Şelenay, Ceyda; Korkut, Zehra; Bülbül, Saliha Beste; Altay, Hafize; Oskay, Kemal
Introduction and hypothesis: The objective was to investigate the effects of spinal stabilization exercises (SSEs) focusing on the pelvic floor with regard to urinary symptoms, pelvic floor muscle strength (PFMS), core stability, quality of life (QoL), and perception of subjective improvement (PSI) in women with overactive bladder (OAB). Methods: Patients were randomly divided into SSE (n=23) and control (n=24) groups. The SSE group received SSEs focusing on the pelvic floor for 3 days a week for 8 weeks and recommendation. The control group received only recommendation. Before (BT) and after treatment (AT), urinary symptoms were evaluated with Overactive Bladder Questionnaire-Version 8 (OAB-V8) and bladder diary. PFMS, core stability, and QoL were assessed using the Modified Oxford Scale (MOS), Sharman test, and King's Health Questionnaire (KHQ) respectively. AT, PSI with a Likert-type scale, and compliance with recommendations using a visual analog scale were assessed. Results: The OAB-V8 and the KHQ scores, the number of voids per day and voids per night decreased and the MOS and the Sharman scores increased in the SSE group (p<0.05). In the control group, the OAB-V8 and incontinence effect, social limitations, emotional state, and sleep sub-dimension scores related to KHQ decreased (p<0.05). The OAB-V8, role and physical limitations, emotional state, and sleep sub-dimension scores decreased more, and the MOS, the Sharman, the PSI, and the compliance with recommendations scores increased more in the SSE group than in the control group (p<0.05). Conclusions: The SSEs focusing on the pelvic floor improved urinary symptoms, PFMS, core stability, QoL, and PSI. This exercise approach may be beneficial in the management of OAB.
Citation - WoS: 16
Citation - Scopus: 19
Evaluation and characterization of Pleurotus eryngii extract-loaded chitosan nanoparticles as antimicrobial agents against some human pathogens
(Taylor & Francis Online, 2020) Acay, Hilal; Yıldırım, Ayfer; Erdem Güzel, Elif; Kaya, Nalan; Baran, Mehmet Fırat
With the increase of antibiotic resistance, which is present at a worrying rate, research on the use of newly developed nanoparticles as an antimicrobial agent with green biotechnology has intensified. The study aimed to investigate the antimicrobial effects of chitosan nanoparticles (CSNP) synthesized using Pleurotus eryngii extract (PE). Characterization of P. eryngii-loaded chitosan nanoparticles (PE-CSNPs) was performed with Fourier transform infrared spectrophotometer, X-ray diffraction, Field-emission scanning electron microscopy, Brunauer-Emmett-Teller, Differential scanning calorimetry, and zeta potential techniques. The FE-SEM images showed that the surface morphology of nanoparticles is similar to CS, but has more porosity network and smaller dimensions structure. The average particle size of spherical PE-CSNPs was obtained as 330.1 nm. The specific surface area and average pore diameter of the synthesized nanoparticles were found as 3.99 m2g-1 and 2.25 nm, respectively. X-ray diffraction determines the presence of an amorphous peak at 2θ = 21.2° results from CS and PE. PE-CSNPs synthesized using P. eryngii extract showed strong antimicrobial activity against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Candida albicans as 0.0156, 0.0625, 0.0625 and 0.0312 mg ml-1, respectively. Thus, it was determined that chitosan nanoparticles formed by the green synthesis of P. eryngii extract showed strong anti-microbial properties.
Citation - WoS: 3
Citation - Scopus: 5
Evaluation inflammatory markers of hemogram parameters in primary ovarian insufficiency
(Turkish journal of obstetrics and gynecology, 2020) Demir, Bülent; Sarıdaş Demir, Süreyya; Özkan Karacaer, Kübra; Paşa, Semir; Sılan, Fatma
Objective: In most of primary ovarian insufficiency (POI) cases, etiologic factors have not been fully elucidated. Recent studies have revealed that inflammatory agents play an important role in the etiopathogenesis of POI. Therefore, the aim of this study was to investigate the role of inflammatory markers of hemogram parameters in POI. Materials and Methods: The study compared 47 healthy women and 47 women diagnosed as having POI retrospectively by scanning electronic and written recording systems. Complete blood counts, day-3 hormone profiles levels of all subjects were analyzed. The neutrophil-lymphocyte ratio (NLR), red cell distribution width (RDW), platelet ratio (RPR), platelet lymphocyte ratio (PLR), and mean platelet volume (MPV) mean platelet lymphocyte ratio (MPLR) were calculated from the complete blood count parameters. Results: White blood cell and MPV values, platelet, and lymphocyte counts were significantly higher in the POI patients (p<0.001, p=0.042, p=0.038, p=0.049, respectively), RPR was significantly lower than the control group (p=0.011), but there were no significant differences in hemoglobin, RDW, NLR, PLR, and MPLR (p=0.454, p=0.057, p=0.635, p=0.780, p=0.126, respectively). The neutrophil count of the study group was higher than in the control group (p=0.057). Bivariate correlation analyses showed no correlations between blood parameters and hormone levels. The area under the receiver operating characteristic curve for RPR in POI was 0.652, with a threshold value 0.053, sensitivity=63% and specificity=63. Conclusion: Inflammatory markers of hemogram detected higher in patients with POI then control subjects.
Experimental and theoretical study on hydrogen production by using Ag nanoparticle‐decorated graphite/Ni cathode
(2021) Yıldız, Reşit; Doğru, Mert, Başak; KARAZEHİR, TOLGA; GÜRDAL DURĞUN, YELİZ; Toprak Döşlü, Serap
In this study, graphite (G) electrode was coated with nickel and decorated with silver nanoparticles (G/Ni/Ag) with the help of galvanostatic method, and electrodes were used as a cathode in alkaline water electrolysis system. The characterization was achieved using X-ray diffraction and field emission scanning electron microscopy. Hydrogen evolution performance of electrodes was investigated via cyclic voltammetry, chronoamperometry, cathodic polarization curves, and electrochemical impedance measurements. Electrochemical results showed that hydrogen production efficiency significantly increased and charge transfer resistance decreased via G/Ni/Ag. The electrochemical water splitting performance of G/Ni/Ag, was established in a joint experimental and computational effort. Water and proton adsorption on Ag-decorated Ni surface were investigated using density functional theory. Electronic structure calculations identified the role of Ag adatom and Ni surface on water and proton adsorptions. From the computational studies, O in water was more reliable to adsorb at the bridge position of the Ag and Ni atoms, leading improved orbital overlap between H and Ni atoms and maximized chemical and physical interactions between the H2O molecules. Therefore, the Ag-decorated Ni(111) surface provides preferable adsorption site for the O atom in water and direct interactions between water Hs and available surface Ni atoms promote water dissociation.

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