Bulunan: 34 Adet 0.003 sn
Koleksiyon [13]
Tam Metin [2]
Yayın Türü [3]
Yazar [20]
Yayın Yılı [5]
Konu Başlıkları [20]
Yayın Dili [1]
Dergi Adı [16]
Evaluation of the protective effect of agmatine against cisplatin nephrotoxicity with 99mTc-DMSA renal scintigraphy and cystatin-C

Salihoglu Y.S. | Elri T. | Gulle K. | Can M. | Aras M. | Ozacmak H.S. | Cabuk M.

Article | 2016 | Renal Failure38 ( 9 ) , pp.1496 - 1502

Background: The aim of the current study was to investigate whether agmatine (AGM) has a protective effect against cisplatin-induced nephrotoxicity. Materials and methods: Thirty-two rats were randomly divided into four groups: (1) Saline (control); (2) Cisplatin (CDDP; 7.5 mg/kg intraperitoneally); (3) Agmatine (AGM; 10 mg/kg intraperitoneally); (4) Cisplatin plus agmatine (CDDP + AGM). Agmatine was given before and two consecutive days after cisplatin injection. All the animals underwent renal scintigraphy with 99mTc-DMSA. The levels of serum creatinine, cystatin C, and blood urea nitrogen (BUN) were measured in addition to examin . . .ation of the tissue samples with light microscopy. Acute renal injury was assessed with biochemical analyses, scintigraphic imaging, and histopathological evaluation. Results: In the cisplatin group, the levels of BUN, creatinine, and cystatin C were significantly higher than that of the controls. Histopathological examination showed remarkable damage of tubular and glomerular structures. Additionally, cisplatin caused markedly decreased renal 99mTc-DMSA uptake. AGM administration improved renal functions. Serum creatinine, BUN, and cystatin C levels had a tendency to normalize and, scintigraphic and histopathological findings showed significantly less evidence of renal toxicity than those observed in animals receiving cisplatin alone. Conclusions: Our data indicate that AGM has a protective effect against cisplatin-induced nephrotoxicity. Therefore, it may improve the therapeutic index of cisplatin. In addition, the early renal damage induced by cisplatin and protective effects of AGM against cisplatin nephrotoxicity was accurately demonstrated with 99mTc-DMSA renal scintigraphy. © 2016 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

Melatonin reverses depressive and anxiety like-behaviours induced by diabetes: involvement of oxidative stress, age, rage and S100B levels in the hippocampus and prefrontal cortex of rats

Ergenç, Meryem | Özaçmak-Sayan, Hale | Turan, İnci | Özaçmak, Veysel Haktan

Article | 2019 | Archives of Physiology and Biochemistry , pp.1496 - 1502

Diabetes is associated with depression and anxiety symptoms. The current investigation was designed to explore the effect of melatonin on depressive and anxiety like-behaviours, oxidative stress, levels of AGE, RAGE and S100B in streptozotocin-induced diabetic rats. The animals were divided into four groups: Normoglycemic; Normoglycemic + melatonin; diabetic; diabetic + melatonin (10 mg/kg, for 4 weeks). The malondialdehyde (MDA), reduced glutathione (GSH), AGE, RAGE and S100B were measured and the depressive and anxiety like-behaviours were assessed by forced swimming and elevated plus maze tests, respectively. Melatonin ameliorate . . .s depressive and anxiety like-behaviours. Concomitantly, melatonin reversed diabetes induced increase of MDA, AGE and decrease of GSH and S100B levels in the hippocampus and prefrontal cortex. In conclusion, our results showed that melatonin administration may exert antidepressant-like and anxiolytic effects in diabetic rats through normalising of AGE/RAGE, S100B and oxidative stress in the prefrontal cortex and hippocampus. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

Bioimpedance spectroscopy for the differential diagnosis of hyponatremia

Kose S.B. | Hur E. | Magden K. | Yildiz G. | Colak D. | Kucuk E. | Toka B.

Article | 2015 | Renal Failure37 ( 6 ) , pp.947 - 950

Background: Hyponatremia is classified according to volume status with the help of physical examination, biochemical measures, urine and serum osmolalities, and echocardiography. Bioimpedance spectroscopy (BIS) has been getting popularity for revealing tissue compositions of various patient groups. The aim of this observational study was to investigate the role of BIS for the differential diagnosis of hyponatremia ( Identifier: NCT01838759). Patients and methods: Personal characteristics of age, sex, weight, height, and blood pressure were recorded. Body composition monitor (BCM) was used for hydration status for e . . .ach individual. Primary outcome was investigated by the accuracy of volume status measured by BIS. Statistics: Kappa statistic (K) is a measure of agreement between two sources, which is measured on a binary scale (i.e., condition present/absent). K statistic can take values between 0 and 1: poor agreement: K < 0.20, fair agreement: 0.2.0-0.3.9, moderate agreement: 0.40-0.59, substantial: 0.60-0.79, very good agreement: 0.80-1.00. Results: Fifty-eight hyponatremia-diagnosed patients, 32 (55.2%) of male with the mean age of 65.2 ± 11 (40-89) years were included. Kappa statistic (K) were very good (K = 0.925) for male (p < 0.00), substantial agreement (K = 0.601) for female (p < 0.002) with the use of BIS for the differential diagnosis of either hypo or hypervolemia in hyponatremic patients compared with gold standard tests which were the combination of echocardiography, serum, and urine osmolality biochemical tests, and physical examination. Conclusion: Bioimpedance spectroscopy is a practical and an inexpensive method. This is the first study in the literature showing the role of BIS for the determination of the volume status and differential diagnosis of hyponatremia when compared with echocardiography. © 2015 © 2015 Informa Healthcare USA, Inc. All rights reserved Daha fazlası Daha az

Peripapillary Choroidal Thickness and Retinal Nerve Fiber Layer in Untreated Patients with Obstructive Sleep Apnea-Hypopnea Syndrome: A Case–Control Study

Yazgan S. | Erboy F. | Celik H.U. | Ornek T. | Ugurbas S.H. | Kokturk F. | Ayar O.

Article | 2017 | Current Eye Research42 ( 11 ) , pp.1552 - 1560

Purpose: To evaluate peripapillary choroidal thickness (PPCT), central macular choroidal thickness (CMCT), and retinal nerve fiber layer (RNFL) thickness in untreated patients with obstructive sleep apnea-hypopnea syndrome (OSAHS). Methods: This prospective, randomized, and comparative study was conducted in a university ophthalmology clinic. 106 eyes of 106 patients with OSAHS and 44 eyes of 44 healthy individuals were evaluated in this study. Only right eyes were evaluated. The patients with OSAHS were divided into three groups as mild (group 1), moderate (group 2), and severe (group 3) according to apnea-hypopnea index. The PPCT, . . . CMCT, and RNFL measurements were performed by using spectral domain optical coherence tomography with enhanced depth imaging technique. The main parameters assessed were PPCT-Temporal, PPCT-Superior, PPCT-Nasal, PPCT-Inferior quadrants, CMCT, and RNFL thicknesses. Results: The PPCT of all quadrants was significantly thicker in the control group compared with the moderate and severe subgroups of OSAHS (p < 0.05). The PPCT-Superior and PPCT-Temporal were significantly thinner in the mild subgroup compared with the control group (p = 0.003 and p = 0.028, respectively). There was no difference between the control and mild groups regarding the RNFL thicknesses except nasal RNFL and inferotemporal RNFL which are thinner in the mild group. The RNFL thicknesses of all quadrants were significantly thicker in the control group compared with moderate and severe subgroups (p < 0.05). The CMCT was significantly thicker in the control group compared with all subgroups of OSAHS (p < 0.05). Conclusions: In OSAHS patients, PPCT, CMCT, and RNFL were significantly thinner compared with the control group. These results may explain why OSAHS patients are prone to normotensive glaucoma. © 2017 Taylor & Francis Group Daha fazlası Daha az

Accuracy of the 24-h urine protein excretion value in patients with preeclampsia: correlation with instant and 24-h urine protein/creatinine and albumin/creatinine ratios

Doğan S. | Sel G. | Arıkan İ.İ. | Harma M.İ. | Harma M. | Barut A. | Özmen Ü.

Article | 2019 | Journal of Obstetrics and Gynaecology39 ( 8 ) , pp.1075 - 1080

The aim of this study was to determine the accuracy of the 24-h urine collection in preeclamptic pregnant women. This study included 65 singletons with preeclampsia and 53 singleton patients in a control-matched group. The ratio of inaccurate 24-h urine collection was measured by calculating expected urine creatinine excretion according to the proportion of pre-pregnancy weight and the lean body mass (LBM) of the patients. Comparisons were made between the accurately-collected 24-h urine protein excretion rates and the instant and 24-h urine protein/creatinine (P/Cr) and albumin/creatinine (A/Cr) ratios. Twenty-four-hour urine colle . . .ction used to diagnose patients with preeclampsia was incorrectly collected 15–73.5% of the time among the patients and the control group. Instant and 24-h urine P/Cr and A/Cr ratios were correlated with total 24-h proteinuria among the patients in whom urine was collected correctly. Considering the 24-h urine P/Cr ratio, rather than the 24-h urine protein excretion value, is a better way to diagnose preeclampsia.IMPACT STATEMENTWhat is already known on this subject? Twenty-four-hour urine collection is considered as the gold standard of diagnosing proteinuria in preeclampsia, in case of the correctly collected. What do the results of this study add? Generally, in the literature the correctness of 24-h proteinuria is not questioned. However, it is actually quite important in daily practice to make the correct diagnosis of the proteinuria not to misdiagnose preeclampsia. What are the implications of these findings for clinical practice and/or further research? In this article, we aimed to show the importance of accurately collected 24-h urine in preeclampsia. We consider and advise to change the gold standard of this technique to 24-h protein/creatinine (P/Cr) ratio, in order to make correct diagnosis of the preeclampsia. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

Concanavaline A conjugated bacterial polyester-based PHBHHx nanoparticles loaded with curcumin for breast cancer therapy

Kılıçay, Ebru | Karahaliloğlu, Zeynep | Hazer, Baki | Tekin, İshak Özel | Denkbaş, Emir Baki

Article | 2016 | Journal of Microencapsulation33 ( 3 ) , pp.274 - 285

The aim of this study was to evaluate therapeutic potential of curcumin-loaded poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) PHBHHx nanoparticles (CUR-NPs) and concanavaline A conjugated curcumin-loaded NPs (ConA-CUR-NPs) for breast cancer treatment. The size and zeta potential of prepared NPs were about 228 ± 5 nm and -23.3 mV, respectively. The entrapment efficiencies of polymer/drug weight ratios, 1.25CUR-NPs, 2.5CUR-NPs, 5CUR-NPs, ConA-1.25CUR-NPs, ConA-2.5CUR-NPs and ConA-5CUR-NPs were found to be ?68, 55, 45, 70, 60 and 51%, respectively. Optimized NPs formulations in the freeze-dried form were assessed with their short-term s . . .tability for 30 days of storage at 4 °C and 25 °C. Anticancer activity of ConA-CUR-NPs was proved by MTT assay and reconfirmed by double staining and flow cytometry results. The anticancer activity of ConA-CUR-NPs was measured in human breast cancer cells (MDA-MB 231) in vitro, and the results revealed that the ConA-CUR-NPs had better tumor cells decline activity. © 2016 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

Designing siRNA-conjugated plant oil-based nanoparticles for gene silencing and cancer therapy

Anılmış, Nur Merve | Kara, Göknur | Kılıçay, Ebru | Hazer, Baki | Denkbaş, Emir Baki

Article | 2019 | Journal of Microencapsulation36 ( 7 ) , pp.635 - 648

In this study, the anticancer activities of two siRNA carriers were compared using a human lung adenocarcinoma epithelial cell line (A549). Firstly, poly(styrene)-graft-poly(linoleic acid) (PS-g-PLina) and poly(styrene)-graft-poly(linoleic acid)-graft-poly(ethylene glycol) (PS-g-PLina-g-PEG) graft copolymers were synthesized by free-radical polymerization. PS-PLina and PS-PLina-PEG nanoparticles (NPs) were prepared by solvent evaporation method and were then characterized. The size was found as 150 ± 10 nm for PS-PLina and 184 ± 6 nm for PS-PLina-PEG NPs. The NPs were functionalized with poly(l-lysine) (PLL) for c-myc siRNA conjugat . . .ion. siRNA entrapment efficiencies were found in the range of 4–63% for PS-PLina-PLL and 6–42% for PS-PLina-PEG-PLL NPs. The short-term stability test was realised for 1 month. siRNA release profiles were also investigated. In vitro anticancer activity of siRNA-NPs was determined by MTT, flow cytometry, and fluorescence microscopy analyses. Obtained findings showed that both NPs systems were promising as siRNA delivery tool for lung cancer therapy. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

Is Change in Hemoglobin Level a Predictive Biomarker of Tyrosine Kinase Efficacy in Metastatic Renal Cell Carcinoma? A Turkish Oncology Group Study

Bilir C. | Yıldız İ. | Bilici A. | Ucar M. | Berk V. | Yıldız Y. | Yazıcı O.

Article | 2017 | Cancer Investigation35 ( 4 ) , pp.248 - 255

Background: There are insufficient predictive markers for renal cell carcinoma (RCC). Methods: A total of 308 metastatic RCC patients were analyzed retrospectively. Results: The increased hemoglobin (Hb) group had significantly higher progression-free survival and overall survival (OS) compared with the decreased Hb group at 11.5 versus 6.35 months (p

Increased Serum Levels of IL-28 and IL-29 and the Protective Effect of IL28B rs8099917 Polymorphism in Patients with Hashimoto’s Thyroiditis

Arpaci D. | Karakas Celik S. | Can M. | Cakmak Genc G. | Kuzu F. | Unal M. | Bayraktaroglu T.

Article | 2016 | Immunological Investigations45 ( 7 ) , pp.668 - 678

Hashimoto’s thyroiditis (HT) is thought to result from decreased T helper type 2 (Th2) responses, leading to the progressive destruction of thyrocytes. IFN-?1, -?2, and -?3 (also known as IL-29, IL-28A, and IL-28B, respectively) are recently described members of the IFN-? family and have been shown to decrease the production of Th2 cytokines in vitro. However, the role and mechanism of IFN-?1 in HT remain unknown. The purpose of this study was to examine whether IL29 and IL28B gene polymorphisms are susceptibility genes for the development of HT. Also, we investigated the effects of IL-29 and IL-28 serum levels in the pathogenesis o . . .f HT. Using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method, single-nucleotide polymorphisms (SNPs) of IL28B rs8099917 (IL28 G/T) and IL29 rs30461 (IL29 T/C) were studied in 99 patients with HT and 100 healthy controls. Considering the allelic distribution of the IL28 G/T polymorphism, a higher frequency of the G allele was observed in the control group versus the HT group. Thus, it was suggested that the G allele may be protective against HT pathogenesis (OR = 0.388, 95% CI = 0.217–0.693; p = 0.001). Our findings also demonstrated that there was a statistically significant difference in serum IL-28 and IL-29 levels between case and control groups (p < 0.001). Increased serum levels of IL-28 and IL-29 were found in patients with HT. However, we did not find a relationship between the IL29 gene polymorphism and HT. In conclusion, the IL28B gene polymorphism and serum IL-28 and IL-29 levels seem to play a role in the pathogenesis of HT. © 2016 Taylor & Francis Daha fazlası Daha az

In Situ Blood Coagulum versus Sutures for Autograft Fixation after Pterygium Excision

Celik T.

Article | 2018 | Current Eye Research43 ( 8 ) , pp.977 - 980

Purpose: To compare the outcomes of autograft fixation using patient’s own blood coagulum and using sutures after pterygium excision. Methods: In this prospective clinical study, 30 eyes of 30 patients with primary pterygium were randomly assigned into two groups: Group 1 (15 eyes) underwent autograft fixation with 10/0 nylon sutures and Group 2 (15 eyes) underwent autograft fixation by using in situ blood coagulum following pterygium excision. Primary outcome measure of this study was graft failure and displacement. Recurrence, the duration of surgery and patient discomfort were also evaluated. The patients were examined at day 1, . . .day 7, month 1, month 6, and month 12. Results: Mean duration of surgery was significantly less in Group 2 (mean duration 14 ± 2 minutes) compared with Group 1 (mean duration 48 ± 2 minutes). Graft failure and displacement were more common in Group 2 (13.3%) compared with Group 1 (6.7%). Recurrence was reported equally in both groups. Patient discomfort was found significantly more in Group 1 (foreign body sensation due to sutures.) Conclusions: Autograft fixation by using in situ blood coagulum after pterygium excision is an effective technique with less patient discomfort and shorter operation time. © 2018, © 2018 Taylor & Francis Group, LLC Daha fazlası Daha az

Management of cervical cancer during pregnancy

Gungorduk K. | Sahbaz A. | Ozdemir A. | Gokcu M. | Sanci M. | Köse M.F.

Review | 2016 | Journal of Obstetrics and Gynaecology36 ( 3 ) , pp.366 - 371

Cervical cancer (CC) is the most common gynaecological cancer during pregnancy. The rarity of the disease and lack of randomised control studies have prevented the establishment of treatment guidelines. The management of CC mainly follows the guidelines for the non-pregnant disease state, expert opinions and limited case reports. Although the management of CC diagnosed during pregnancy appears to be a significant dilemma for the patients and specialists, the prognosis of CC is not influenced by pregnancy. The treatment decision should be made collaboratively with a multidisciplinary team consisting of an obstetrician, gynaecologist, . . . oncologist and paediatrician. The concerns of the patient should be taken into account. © 2015 Taylor & Francis Group, LLC Daha fazlası Daha az

Effect of multiple thrombophilic gene mutations on uterine artery blood flow in nonpregnant recurrent pregnancy loss patients: are we searching enough?

Akdemir Y. | Ayvaci H. | Uludogan M.

Article | 2019 | Journal of Maternal-Fetal and Neonatal Medicine , pp.366 - 371

Objective: To investigate whether multiple thrombophilic mutations had a significant effect on uterine artery blood flow of nonpregnant recurrent pregnancy loss (RPL) patients. Materials and methods: Among 71 RPL patients, FV Leiden (FV), prothrombin G20210A (PTGM) and MTHFR mutations, deficiency of protein S, protein C and antithrombin III (AT3), association of Val34Leu polymorphism of the FXIII (FXIII), 4G/5G polymorphism of plasminogen activator inhibitor (PAI), -455-G/A polymorphism of ß-fibrinogen (fibrinogen), and HPA-1 a/b L33P polymorphism of GPIIIa (GPIIIa) genes were investigated. Doppler flow measurements of RPL patients . . .and healthy controls were performed at mid-luteal phase. Results: Twenty-two patients who had no thrombophilic gene mutations were grouped as unexplained RPL. Also, while 25 patients had multiple mutations, 24 patients had single mutation. In the multiple mutation RPL group, the most frequent mutations were PAI (22%), MTHFR C677T (20%), MTHFR A1298C (19%), and fibrinogen (11%). Only in the multiple mutation RPL group, mean PI and dominant PI values were significantly higher than the control group. Conclusions: Our data showed negative effects of multiple thrombophilic gene mutations on uterine artery blood flow and clarified the different effects of single and multiple thrombophilic factors on uterine artery vasculature. It is concluded that investigating more thrombophilic mutations could ameliorate prognostic factors of RPL and interactions to improve uterine artery blood flow could bring benefit to obstetric outcome. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

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