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YAVUZ, MAHMUT

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YAVUZ

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MAHMUT

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    Publication
    Screening for fabry disease in patients who underwent renal biopsy and identification of a novel mutation
    (Aves, 2021-04-01) Oruç, Ayşegül; Yıldız, Abdulmecit; Akgür, Suat; Aydın, Mehmet Fethullah; Ersoy, Alparslan; Yavuz, Mahmut; Dilek, Kamil; Güllülü, Mustafa; ORUÇ, AYŞEGÜL; YILDIZ, ABDULMECİT; AKGÜR, SUAT; Aydın, Mehmet Fethullah; ERSOY, ALPARSLAN; YAVUZ, MAHMUT; DİLEK, KAMİL; GÜLLÜLÜ, MUSTAFA; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; 0000-0002-0342-9692; 0000-0002-5665-7402; AAJ-8220-2020; AAH-4002-2021; HIG-9032-2022; EJA-1761-2022; CPX-5894-2022; EHM-7377-2022; EUF-5229-2022; JGS-9425-2023
    Background: The X-linked Fabry disease (FD) with lysosomal storage of globotriaosylceramide (Gb3) due to alpha-galactosidase deficiency contributes to nephropathy consisting of proteinuria and renal failure eventually. Early initiation of the enzyme replacement therapy promises favorable renal outcomes. With the importance of early diagnosis, we screened FD among proteinuric patients in whom biopsy findings revealed Fabry nephropathy.Methods: Patients with light microscopic biopsy findings of vacuolated cells, focal and/or segmental glomerular sclerosis, tubular atrophy, and interstitial fibrosis were not associated with particular etiology, the presence of acro-paresthesia, angiokeratomas, and cornea verticillata, stroke history younger than 50 years, family history of renal failure with no cardiovascular risk factors were screened. Fifty-three of 308 consecutive adult patients (45.34 +/- 15.23 years old, 60.1% male) who underwent renal biopsy because of proteinuria were enrolled in the study. Screening for FD was performed by assessing alpha-Gal A activity in dried blood spots (DBS) for males and by genetic testing for females.Results: Fifty-three patients (39.94 +/- 11.97 years, 69.8% male) who underwent renal biopsy were screened. Laboratory findings revealed mean serum creatinine of 1.44 +/- 1.06 mg/dL, mean estimated glomerular filtration rate of 78.31 +/- 39.89 mL/min/1.73 m(2), and mean proteinuria of 4.32 +/- 3 g/day, whereas the females genetic screening was negative. Two of 37 males had low enzyme activity (<0.1 micmol/L/h) and confirmed FD by genetic analysis in whom one had a novel mutation of GLA gene (c.(1047G>A) p.(Trp349*)).Conclusion: It is worth noting that FD screening in patients with proteinuria, in whom vacuolated cells, mesangial expansion, glomerulosclerosis, interstitial fibrosis, and tubular atrophy of unknown etiology, are present in the renal biopsy either with or without a family history of kidney disease.
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    Retrospective evaluation of the factors affecting etiology and prognosis of adult acute kidney injury
    (Galenos Yayıncılık, 2020-06-01) Göçken, Abdulkadir; Ayar, Yavuz; Yavuz, Mahmut; Yabacı, Ayşegül; YAVUZ, MAHMUT; Yabacı, Ayşegül; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Biyoistatistik Bilim Dalı.; CAJ-5024-2022; EHM-7377-2022
    Aim: Acute kidney injury (AKI) is still an important cause of morbidity and mortality. Several factors are effective in its frequency, etiology, prognosis and mortality. In our study, we aimed to demonstrate the etiology and prognostic factors of AKI.Methods: A total of 272 patients diagnosed with AKI, who were hospitalized in the nephrology department between January 2011 and December 2015, were included in the study. In addition to the demographic characteristics of patients, clinical and laboratory findings were evaluated retrospectively.Results: Forty-seven point four percent of patients were female and 52.6% were male. The mean age of the patients was 61.6 years, the mean length of hospital stay was 13.3 days, the number of hemodialysis sessions was 1.24 and the mortality rate was 4.8%. The need and number of hemodialysis sessions were significantly higher in older patients (>65 years). The need and number of hemodialysis sessions were higher in the renal AKI group (48.7%, 1.9). The length of hospital-stay was longer and mortality rate was higher in patients with renal AKI compared to the other groups (16.4 days, 8.8%). Mortality rate, length of hospital-stay, and number of hemodialysis sessions were found to be increased significantly in patients with infection (42%).Conclusion: Etiology and accompanying infection in AKI are the most important factors affecting mortality. In addition, anemia and advanced age increase the length of hospital stay and the need for hemodialysis.
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    The relationship between visfatin and carotid atherosclerosis in patients with advanced chronic kidney disease
    (Oxford Univ Press, 2015-05-01) Ayar, Yavuz; Ersoy, Alparslan; Sayılar, Emel Işıktaş; Yıldız, Abdülmecit; Pektaş, Fatih; Tüysüz, Özlem; Yavuz, Mahmut; Topal, Naile Bolca; Dirican, Melahat; Arslan, Ismail; Ateş, Çiğdem Aksu Coşkun; Ayar, Yavuz; ERSOY, ALPARSLAN; Sayılar, Emel Işıktaş; YILDIZ, ABDULMECİT; Pektaş, Fatih; Tüysüz, Özlem; YAVUZ, MAHMUT; BOLCA TOPAL, NAİLE; Dirican, Melahat; Arslan, İsmail; Ateş, Çiğdem Aksu Coşkun; Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Tıbbi Biyokimya Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Dahili Tıp Anabilim Dalı.; 0000-0003-4607-9220; 0000-0002-1539-9216; HIG-9032-2022 ; O-9948-2015; AAI-2327-2021; W-2575-2017; GSE-0029-2022; AGF-0767-2022; AAH-5054-2021; JDU-0150-2023; ECR-6289-2022; EHM-7377-2022; ESK-6562-2022; JML-0742-2023; IIU-0465-2023
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    Arm circumference: Its importance for dialysis patients in the obesity era
    (Springer, 2013-08-01) Akpolat, Tekin; Kaya, Coskun; Utaş, Cengiz; Arınsoy, Turgay; Taskapan, Hulya; Erdem, Emre; Yılmaz, M. Emin; Ataman, Rezzan; Bozfakioglu, Semra; Özener, Cetin; Karayaylalı, İbrahim; Kazancıoğlu, Rumeyza; Camsarı, Taner; Ersoy, Fevzi; Duman, Soner; Ateş, Kenan; Yavuz, Mahmut; YAVUZ, MAHMUT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.
    The purposes of this study were to investigate the association between arm circumference and body mass index (BMI) and to discuss problems, mainly arm circumference and cuff size mismatch, that could affect the reliability of home blood pressure monitoring (HBPM) among peritoneal dialysis (PD) and hemodialysis (HD) patients.525 PD and 502 HD patients from 16 centers were included in the study. A two-part questionnaire was used to gather information from the participants. Arm circumferences were categorized into four groups according to the British Hypertension Society cuff size recommendations.Mean BMI and arm circumference of all participants were 25.0 kg/m(2) and 27.6 cm, respectively. There was a significant correlation between BMI and arm circumference. The mean BMI and arm circumference values were higher in PD patients than in HD patients. Requirement of a large-sized adult cuff was more common among PD patients compared to HD patients (14 % vs 8 %, p = 0.002).Since HBPM is a useful tool for clinicians to improve BP control, nephrologists should be aware of the problems related to HBPM in dialysis patients and take an active role to increase the reliability of HBPM.
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    Clinical significance of genetic in patients with C3 glomerulopathies
    (Oxford Univ Press, 2017-05-01) Oruç, Ayşegül; Yıldız, Abdulmecit; Berdeli, Afig; Yavuz, Mahmut; Dilek, Kamil; Güllülü, Mustafa; Ersoy, Alparslan; ORUÇ, AYŞEGÜL; YILDIZ, ABDULMECİT; YAVUZ, MAHMUT; DİLEK, KAMİL; GÜLLÜLÜ, MUSTAFA; ERSOY, ALPARSLAN; Uludağ Üniversitesi; 0000-0002-0342-9692; 0000-0002-4791-8367; 0000-0002-0710-0923; AAH-4002-2021; AAH-5054-2021; HIG-9032-2022; EHM-7377-2022; EUF-5229-2022; CTG-8811-2022; AAH-5054-2021
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    Modified histopathological classification with age-related glomerulosclerosis for predicting kidney survival in ANCA-associated glomerulonephritis
    (Springer, 2022-09-25) Aydın, Mehmet Fethullah; Yıldız, Abdülmecit; Oruç, Ayşegül; Vuruşkan, Berna Aytaç; Akgür, Suat; Ayar, Yavuz; Güllülü, Mustafa; Dilek, Kamil; Yavuz, Mahmut; Ortaç, Hatice; Ersoy, Alparslan; Aydın, Mehmet Fethullah; YILDIZ, ABDULMECİT; ORUÇ, AYŞEGÜL; AYTAÇ VURUŞKAN, BERNA; Ortaç, Hatice; GÜLLÜLÜ, MUSTAFA; DİLEK, KAMİL; ERSOY, ALPARSLAN; YAVUZ, MAHMUT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Patoloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Biyoistatistik Anabilim Dalı.; 0000-0002-0342-9692 ; 0000-0002-5665-7402 ; AAJ-8220-2020; HIG-9032-2022; AAH-4002-2021; EEJ-1452-2022; JGS-9425-2023; EUF-5229-2022; EHM-7377-2022; HJF-9598-2022; CPX-5894-2022
    Background The histopathological classification of ANCA-GN divides patients into four groups based on signs of glomerular injury. However, this classification did not consider age-related glomerulosclerosis. In this study, we aimed to compare the prediction of renal survival between Berden's ANCA-GN histopathological classification and ANCA-GN histopathological classification modified with age-related glomerulosclerosis. Methods Between January 2004 and December 2019, 65 patients diagnosed with ANCA-GN were enrolled. Demographic, laboratory, and histopathologic findings were retrospectively analyzed. Renal survival analyses were compared according to classical and modified ANCA-GN histopathological classifications. Multivariate Cox regression analysis for the factors affecting renal survival was performed. Results In Berden's ANCA-GN histopathological classification, 15 patients were in the focal group, 21 in the crescentic, 21 in the sclerotic, and 8 in the mixed group. The ANCA-GN histopathological classification model generated statistically significant predictions for renal survival (p = 0.022). When the histopathological classification was modified with age-related glomerulosclerosis, eight of the nine patients previously classified in the sclerotic group were classified in the mixed and one in the crescentic groups. Modification of histopathological classification with age-related glomerulosclerosis increases the statistical significance in renal survival analysis (p = 0.009). The multivariate Cox regression analysis showed that the disease-related global sclerotic glomeruli percentage and serum creatinine level were significant independent factors. Conclusion Modification of Berden's ANCA-GN histopathological classification model with age-related glomerulosclerosis may increase the statistical significance of the histopathological classification model.
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    The relationship between severity of interstitial fibrosis and anemia in patient with primary glomerulonephritis: The data from TSN-gold working group
    (Oxford Univ Press, 2020-06-01) Cebeci, Egemen; Turgutalp, Kenan; Öztürk, Savaş; Özlük, Yasemin; Bek, Sibel Gökçay; Şumnu, Abdullah; Seyahi, Nurhan; Yavuz, Mahmut; Pişkinpaşa, Serhan Vahit; Akçay, Ömer Faruk; Sakaci, Tamer; Şahin, Garip; Tokgöz, Bülent; Şahin, Gülizar Manga; Bozacı, Ilter; Dursun, Belda; Sipahi, Savaş; Kayalar, Arzu Özdemir; Süleymanlar, Gültekin; Ulu, Memnune Sena; Güzel, Fatma Betül; Kutlay, Sim; Parmaksız, Ergün; Koz, Süleyman; Kurultak, İlhan; Selçuk, Nedim Yılmaz; Yildırım, Yaşar; Gürsu, Meltem; Çavdar, Caner; Timuçin, Meryem; Aydın, Zeki; Oygar, Deren; Kahvecioğlu, Serdar; Kibar, Müge Uzerk; Torun, Dilek; Taymez, Dilek Güven; Küçük, Mehmet; Demir, Serap; Koç, Leyla; Sezer, Siren; Duranay, Murat; Bardak, Simge; Altintepe, Lüftullah; Koç, Mehmet; Azak, Alper; Odabaş, Ali Rıza; Yılmaz, Zülfikar; Paydaş, Saime; YAVUZ, MAHMUT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; EHM-7377-2022
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    An enflammatory marker in chronic renal failure patients: Visfatin
    (Galenos Yayıncılık, 2015-09-01) Ayar, Yavuz; Sayılar, Emel Işıktaş; Yavuz, Mahmut; Arslan, İsmail; Aksu, Çiğdem; Ateş, Coşkun; Pektaş, Fatih; Tüysüz, Özlem; Topal, Naile Bolca; Dirican, Melahat; Ayar, Yavuz; Sayılar, Emel Işıktaş; YAVUZ, MAHMUT; Arslan, İsmail; Aksu, Çiğdem; ATEŞ, COŞKUN; Pektas, Fatih; Tüysüz, Özlem; BOLCA TOPAL, NAİLE; Dirican, Melahat; Uludağ Üniversitesi/Tıp Fakültesi/Nefroloji Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/İç Hastalıkları Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Tıbbi Biokimya Anabilim Dalı.; 0000-0003-4607-9220; 0000-0002-1539-9216; 0000-0003-4565-9848; AGF-0767-2022; W-2575-2017; EHM-7377-2022; JML-0742-2023; HPQ-6488-2023; CDO-0747-2022; JDU-0150-2023; ECR-6289-2022; AAI-2327-2021; ESK-6562-2022
    Aim: Visfatin is a cytokine released from adipose tissue, especially in enflammation. In our study, we tried to show the relationship of visfatin levels with chronic renal failure (CRF) as an enflammatory marker.Methods: We included 50 CRF patients (28 male, 22 female) who attended Uludag University Nephrology Clinic and 31 healthy volunteers (13 male, 18 female). Visfatin levels and biochemical parameters, such as parathyroid hormone (PTH), lipid parameters, albumin, C-reactive protein (CRP), creatinine, urea, immunoglobulins, etc. were examined.Results: In CRF patients, visfatin levels were found to be significantly increased (p<0.001) and albumin, hemoglobin, body mass index (BMI) and high density lipoprotein (HDL) cholesterol levels were decreased (p<0.001). Triglycerides (p=0.003), CPR (p=0.005), procalcitonin (p<0.001), IgG3 (p=0.003), and ferritin (p<0.001) levels were significantly higher in patient group than in control group as an enflammatory marker.Conclusion: CRF is an independent enflammatory process. Visfatin levels in patients with chronic renal failure patients are determined to be high as an indicator of enflammation.
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    Relationship between fetuin-a level and cardiovascular risk factors in peritoneal dialysis patients
    (Türk Nefroloji Diyaliz Transplantasyon Dergisi, 2013-01-01) Çubukçuoğlu, Tarık; Rasschaert, Nele; Kaçan, Turgut; Gül, Cuma Bülent; Yavuz, Mahmut; Çubukçuoğlu, Tarık; GÜL, CUMA BÜLENT; YAVUZ, MAHMUT; Uludağ Üniversitesi/Tıp Fakültesi/İç Hastalıkları Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/İç Hastalıkları Anabilim Dalı/Nefroloji Bilim Dalı.; 0000-0003-2467-9356; A-7063-2018; ESA-7356-2022; EHM-7377-2022
    OBJECTIVE: Vascular calcifications and chronic inflammation are the main reasons of the decreased life span and prevalent morbidity for patients on renal replacement therapy due to chronic renal failure. Scoring systems used to determine the chance of cardiovascular (CV) risk and traditional CV risk factors frequently fail to identify the risk in these patients. New markers to predict the risk of CV disease continues to be investigated. One of the most studied marker in recent years is a serum glycoprotein fetuin-A, which is major calcification inhibitor. We aimed to study the relation between fetuin-A subclinical inflammation and cardiovascular risk factors in Peritoneal Dialysis (PD) patients and healthy volunteers.MATERIAL and METHODS: Forty-eight PD patients and 27 healthy volunteers were included in the study. Fetuin-A levels, body weight, body mass index, blood pressure, markers of inflammation (sedimentation, C-reactive protein, ferritin) and lipid profile tests were performed. The relationship between these parameters was compared with fetuin-A.RESULTS : CRP and sedimentation levels were significantly higher in the group of PD patients. Fetuin-A levels were significantly lower in PD patients than the control group. There was a negative correlation between serum fetuin-A levels, average arterial blood pressure and CRP.CONCLUSION: Fetuin-A can be used to predict subclinic inflammation, and cardiovascular mortality risk in PD patients.