Browsing by Author "Ozdemir, Fatma Nurhan"

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The Changing Trends of Peritoneal Dialysis Related Peritonitis and Novel Risk Factors
(2015) Ozisik, Lale; Ozdemir, Fatma Nurhan; Tanriover, Mine Durusu; 0000-0002-5682-0943; 0000-0002-3494-8997; 26042343; AAK-1697-2021
Aim: Continuous ambulatory peritoneal dialysis (PD) has become a treatment modality for end stage renal disease with a peak of its use in 1990s. The aim of this study was to examine the peritonitis rates, causative organisms and the risk factors of peritonitis in a large group of patients in our center. Methods: The study was conducted in the Nephrology Department of a University Hospital in Turkey. Patients in the PD programme between January 2000 and January 2006 were included. Cohort-specific and subject specific peritonitis incidence, and peritonitisfree survival were calculated. Causative organisms and risk factors were evaluated. Results: Totally 620 episodes of peritonitis occurred in 440 patients over the six years period. Peritonitis rates showed a decreasing trend through the years (0.79 episodes/patient-year 2000-2003 and 0.46 episodes/patient-year 2003-2006). Cohort-specific peritonitis incidence was 0.62 episodes/patient-years and median subject-specific peritonitis incidence was 0.44 episodes/patient-years. The median peritonitis-free survival was 15.25 months (% 95 CI, 9.45-21.06 months). The proportion of gram-negative organisms has increased from 9.8% to 17.3%. There was a significant difference in the percentage of culture negative peritonitis between the first three and the last three years (53.1% vs. 43.2%, respectively). Peritonitis incidence was higher in patients who had been transferred from HD, who had catheter related infection and who had HCV infection without cirrhosis. Conclusions: Our study showed significant trends in the peritonitis rates, causative organisms and antibiotic resistance. Prior HD therapy, catheter related infections and HCV infection were found to be risk factors for peritonitis.
Clinicopathologic Study of Kidney Biopsies in Patients Before or After Liver Transplant
(2014) Terzi, Aysen; Ozdemir, Binnaz Handan; Taslica, Firdevs Zeynep; Ozdemir, Fatma Nurhan; Kirnap, Mahir; Haberal, Mehmet; https://orcid.org/0000-0002-1225-1320; https://orcid.org/0000-0002-7528-3557; https://orcid.org/0000-0002-5682-0943; https://orcid.org/0000-0002-3462-7632; 24635810; F-7546-2013; X-8540-2019; AAK-1697-2021; AAH-9198-2019; AAJ-8097-2021
Objectives: The purpose of this study was to evaluate the causes of kidney impairment associated with liver transplant in patients who had kidney biopsy before or after liver transplant. Materials and Methods: In 408 patients who had liver transplant from January 1990 to December 2012, there were 10 patients who had kidney biopsy (total, 19 kidney biopsies) for evaluation of kidney dysfunction. A retrospective review of clinical records and kidney biopsies was performed. Results: There were 7 male and 3 female patients (median age at liver transplant, 43 y; range, 10 to 62 y). The most frequent reason for liver transplant were hepatitis B virus cirrhosis (4 patients). There were 3 patients who had a kidney transplant before or concurrent with liver transplant. Increased serum creatinine level was the most common clinical finding at the time of kidney biopsy. The median interval from liver transplant to kidney biopsy was 495 days (mean, 1025 d; range, 10-4980 d). The most common pathology in the kidney biopsies was immune complex glomerulonephritis (total, 7 patients: IgA nephropathy, 4 patients; lupus nephritis, 2 patients; membranoproliferative glomerulonephritis, 1 patient). There were 4 patients who had allergic tubulointerstitial nephritis, 2 patients who had chronic calcineurin inhibitor nephrotoxicity, and 1 patient who had karyomegalic nephropathy. There were 7 patients who died at mean 34 months (range, 1-70 mo) after liver transplant. The other 3 patients were alive at mean 128 months (range, 67-193 mo) after liver transplant and had a functioning liver graft and chronic kidney disease. Conclusions: Chronic kidney disease after liver transplant has a major effect on mortality. The frequency of immune complex glomerulonephritis associated with liver transplant may be greater than previously recognized.
Endothelial Nitric Oxide Synthase Polymorphism Influences Renal Allograft Outcome
(2014) Uyar, Murathan; Sezer, Siren; Ozdemir, Fatma Nurhan; Kulah, Eyup; Arat, Zubeyde; Atac, Fatma Belgin; Haberal, Mehmet; https://orcid.org/0000-0002-7326-8388; https://orcid.org/0000-0002-5682-0943; https://orcid.org/0000-0001-6041-4254; https://orcid.org/0000-0001-6868-2165; https://orcid.org/0000-0002-3462-7632; 24372826; AAK-5313-2021; JYQ-2550-2024; AAK-1697-2021; AAJ-5764-2021; ABG-9966-2020; AAJ-8097-2021
BackgroundAtherosclerotic lesions within the graft are considered to be a major cause of interstitial fibrosis/tubular atrophy (IF/TA). We evaluated the factors that influence the development of IF/TA and three- and five-yr graft survival including nitric oxide synthase (eNOS) and angiotensin II type 1 and type 2 receptor gene polymorphism. MethodsSeventy-one male and 35 female patients (age: 34.911.2yr) who underwent living-related renal transplantation were included. Angiotensin type 1 and type 2 receptor gene polymorphisms and eNOS intron 4 gene polymorphism were analyzed. The pre- and post-transplant laboratory data, patient characteristics, acute rejection episodes, and presence of IF/TA were evaluated. ResultsPatients with the bb allele of eNOS gene had a lower prevalence of post-transplant third year (12.6% and 38.5%, p=0.005) and fifth year IF/TA (46.6% and 82.3%, p=0.02) and a lower incidence of five-yr graft failure (35.4% and 55.6%, p<0.005). The eNOS gene polymorphism was independent and was the most prominent factor associated with third and fifth year IF/TA (p=0.01, RR: 29.72, and p=0.03, RR: 4.1, respectively). No significant relationship existed when angiotensin II gene polymorphisms were considered. ConclusionsWe concluded that recipient eNOS gene polymorphism can predict IF/TA, and the presence of the bb allele is associated with better graft outcome.
Free Triiodothyronine in Hemodialysis Patients Link With Malnutrition and Inflammation
(2014) Yavuz, Demet; Sezer, Siren; Yavuz, Rahman; Canoz, Mujdat Batur; Altinoglu, Alpaslan; Elsurer, Rengin; Arat, Zubeyde; Ozdemir, Fatma Nurhan; https://orcid.org/0000-0002-4082-6320; https://orcid.org/0000-0002-7326-8388; https://orcid.org/0000-0002-5682-0943; 24878944; ABG-9980-2021; JYQ-2550-2024; AAK-1697-2021
Introduction. Free triiodothyronine (FT3) is a marker of comorbidity in end-stage renal disease and in many acute and chronic diseases. There is lack of data about the link between FT3 levels and malnutrition and inflammation in hemodialysis patients. The objective of the present study was to investigate the link between FT3 and malnutrition and inflammation in hemodialysis patients. Materials and Methods. A total of 84 patients were included in the study (38 men and 46 women; mean age, 56.2 +/- 14.8 years; hemodialysis duration, 95.72 +/- 10.35 months). Serum FT3, free thyroxin, and thyroid-stimulating hormone concentrations were determined. Demographic data and laboratory values were evaluated. Patients' comorbidity status was determined using the Charlson Comorbidity Index (CCI), and malnutrition-inflammation status was determined by Malnutrition-Inflammation Score (MIS). Results. Serum FT3 concentration inversely correlated with age (r = -0.328, P =.002), CCI (r = -0.591, P < .001), C-reactive protein (r = -0.299, P =.01), and MIS (r = -0.671, P < .001), and positively correlated with serum albumin (r = 0.389, P < .001). In multivariate linear regression analysis, FT3 was independently associated with MIS (beta, -0.14; 95% confidence interval, -0.175 to 0.063, P = .003), adjusted for CCI, C-reactive protein level, serum albumin level, and MIS. Conclusions. The results of this study indicate that FT3 is negatively correlated with inflammatory markers, namely C-reactive protein, and it is independently related with MIS in hemodialysis patients. Therefore, we suggest that FT3 can be accepted as an inflammatory marker in hemodialysis patients.
Impact of Vitamin D3 on Cytoskeletal Reorganization and Regulation of Adherens Junctions of Tubule Cells: Epithelial to Mesenchymal Transition and Development of Interstitial Fibrosis in Renal Allografts
(2018) Ozdemir, B. Handan; Ozdemir, Fatma Nurhan; Ayva, Ebru Sebnem; Akcay, Eda Yilmaz; Soy, Ebru H. Ayvazoglu; Ozdemir, Gokce; Polat, Aysegul Yucel; Haberal, Mehmet; 0000-0002-7528-3557; 0000-0002-5682-0943; 0000-0002-2280-8778; 0000-0002-0993-9917; 0000-0003-2545-0078; 0000-0002-3462-7632; X-8540-2019; AAK-1697-2021; AAK-1967-2021; AAC-5566-2019; AAL-4282-2020; AAJ-8097-2021
Rearrangement of the Endothelial Cell Cytoskeleton in Glomerular and Peritubular Capillaries after Antibody-Mediated Rejection: Significance in the Development of Transplant Glomerulopathy and Interstitial Fibrosis
(2018) Ozdemir, B. Handan; Ozdemir, Fatma Nurhan; Ayva, Ebru Sebnem; Akcay, Eda Yilmaz; Soy, Ebru H. Ayvazoglu; Haberal, Mehmet; 0000-0002-7528-3557; 0000-0002-5682-0943; 0000-0002-2280-8778; 0000-0001-6831-9585; 0000-0002-0993-9917; 0000-0002-3462-7632; X-8540-2019; AAK-1697-2021; AAK-1960-2021; AAK-1967-2021; AAJ-8097-2021
Relationship Between Inflammation, Sex Hormone Profile and Sexual Dysfunction in Female Patients Receiving Different Types of Renal Replacement Therapy
(2014) Altunoglu, Alpaslan; Yavuz, Demet; Canoz, Mujdat Batur; Yavuz, Rahman; Karakas, Latife Atasoy; Bayraktar, Nilufer; Colak, Turan; Sezer, Siren; Ozdemir, Fatma Nurhan; Haberal, Mehmet; https://orcid.org/0000-0002-4082-6320; https://orcid.org/0000-0001-7369-5470; https://orcid.org/0000-0002-7886-3688; https://orcid.org/0000-0002-8372-7840; https://orcid.org/0000-0002-7326-8388; https://orcid.org/0000-0002-5682-0943; https://orcid.org/0000-0002-3462-7632; ABG-9980-2021; AEY-5060-2022; Y-8758-2018; AAJ-8554-2021; JYQ-2550-2024; AAK-1697-2021; AAJ-8097-2021
Sensitization Status of Patients on the Deceased Donor Kidney Transplant Waiting List: A Single-Center Experience
(2022) Erdogmus, Siyar; Celebi, Zeynep Kendi; Turgut, Didem; Sayin, Burak; Ozdemir, Fatma Nurhan; Colak, Turan; Haberal, Mehmet; 0000-0002-3462-7632; AAJ-8097-2021
Objectives: This study aimed to analyze the features of patients on the deceased donor kidney transplant waiting list and risk factors associated with sensitization that affect panel reactive antibody status in our center. Methods: Patients' data were collected retrospectively. Panel reactive antibody screening and definition tests were studied for class I (A, B, and C) and class II (DR, DP, DQ) antigens with Luminex every 6 months. Patients with panel reactive antibody >5% and antibody strength >1000 median fluorescence intensity were considered panel reactive antibody-positive. Based on the panel reactive antibody status, the patients were divided into 2 groups: the panel reactive antibody-positive group and -negative group. Results: A total of 338 patients (60% male, mean age: 52.6 +/- 14.6 years) were included in the analysis. Panel reactive antibody positivity was detected in 117 (34.6) patients on the waiting list. Compared with the panel reactive antibody-negative patient group, the panel reactive antibody-positive patient group had higher rate of women and lower age (P <.001 and P <.001, respectively). The patients in the panel reactive antibody-positive group also had longer dialysis vintage (P =.027), higher rate of blood transfusion history (P <.001), organ transplant (P <.001), and higher number of blood transfusion (P <.001). Female gender (odd ratio:4.094, 95% CI:2.275-7.368, P <.001), history of blood transfusion (odds ratio:2.027, 95% CI:1.131-3.633, P =.018), and organ transplant (odds ratio:16.894, 95% CI:7.212-39.578, P <.001) were independent risk factors associated with panel reactive antibody positivity. Conclusion: Updates of the organ allocation system to consider sensitized patients and new strategies to expand the donor pool and donation rates are needed in Turkiye.