Browsing by Author "Karasu, Zeki"
Now showing 1 - 7 of 7
- Results Per Page
- Sort Options
Item Association of tnf-alpha-308 polymorphism with the outcome of hepatitis B virus infection in Turkey(Elsevier, 2008-01) Karasu, Zeki; Baştürk, Bilkay; Kılıç, Murat; Ulukaya, Sezgin; Boyacıoğlu, Ahmet Sedat; Oral, Haluk Barbaros; Uludağ Üniversitesi/Tıp Fakültesi/Mikrobiyoloji ve Enfeksiyon Hastalıkları Anabilim Dalı İmmünoloji Ünitesi.; 0000-0003-0463-6818; K-7285-2012; 7004498001Background and aim: Cytokines play important roles in the regulation of immune response. The aim of the study was to investigate the association of the cytokine gene polymorphisms with persistence of hepatitis B virus (HBV) infection and the development of end-stage liver disease (ESLD) due to HBV infection. Methods: The study involved 27 patients with end-stage liver disease due to HBV infection, 23 HBV carriers and 60 healthy controls. All genotyping (TNF-alpha, TGF-beta, IL-10, IFN-gamma) experiments were performed using sequence specific primers (PCR-SSP) by using commercial kit according to manufacturers' instructions. Results: The frequencies of TNF-alpha -308 G/G and TGF-beta 1 codon 10-25 T/C-G/G polymorphisms were significantly higher in HBV-infected individuals (patients + carriers) when compared with those of healthy controls (p: 0.02 and p: 0.004, respectively). The frequency of TNF-alpha -308 G/G polymorphism was significantly higher in the patients than those of the healthy controls (p: 0.02), whereas the frequency of TGF-beta 1 codon 10-25 T/T-G/G polymorphism was lower (p: 0.028). On the other hand, TNF-alpha -308 G/G and TGF-beta codon 10-25 T/C-G/G polymorphisms were significantly more common in HBV carriers than the control group (p: 0.017 andp: 0.018, respectively). In addition, TNF-alpha -308 G allele frequency was significantly more common in HBV-infected individuals (patients + carriers) than those of healthy controls (p: 0.0007). TNF-alpha -308 G allele frequency was also found to be higher in patients or carriers when compared with those of healthy controls (p: 0.01 and p: 0.01, respectively). Statistically significant differences were still kept after Bonferroni correction of the p-values for only TNF-alpha -308 G allele frequency in patients or carriers (Pc). Conclusion: Our study suggests that TNF-alpha gene polymorphism in patients infected with HBV would result in relatively inefficient inhibition of HBV and development of ESLD, and therefore, may be valuable predictor determinants for the development of ESLD in patients with chronic HBV infection.Publication Covid-19 in liver transplant recipients: A national cohort(Elsevier, 2021-07-01) Kabaçam, Gökhan; Turan, İlker; Kiyici, Murat; Ellik, Zeynep Melekoğlu; Dolu, Süleyman; Dayanğaç, Murat; Arı, Derya; Gökçe, Dilara Turan; Yıldırım, Abdullah Emre; Gençdal, Genco; Harputluoğlu, Murat; Kartal, Aysun; Demiray, Emine Kübra Dindar; Gündüz, Feyza; Ergenç, İlkay; Efe, Cumali; Sümer, Hale Gökcan; Kayhan, Meral Akdoğan; Gülşen, Murat Taner; Akyıldız, Murat; Arıkan, Çiğdem; Karademir, Sedat; Balcı, Deniz; Dündar, Ziya; Akarsu, Mesut; Günşar, Fulya; Karasu, Zeki; İdilman, Ramazan; KIYICI, MURAT; DÜNDAR, HALİT ZİYA; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji Anabilim Dalı.; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Genel Cerrahi Anabilim Dalı.; FHW-0015-2022; JHK-0911-2023Item Cytokine gene polymorphism and early graft rejection in liver transplant recipients(Elsevier Science, 2004-11) Karasu, Zeki; Ulukaya, Sezgin; Ayanoǧlu, Hilmi Ömer; Akyıldız, Murat; Tokat, Yaman; Baştürk, Bilkay; Ulukaya, Engin; Uludağ Üniversitesi/Tıp Fakültesi/İmmunoloji Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Tıbbi Biyokimya Anabilim Dalı.; 0000-0002-8784-1974; AAD-6918-2021; K-5792-2018; 55910304400; 6602927353Cytokines, which play important roles in allograft rejection, show variable production among individuals. These variations may be related to genetic polymorphisms within the regulatory regions of the cytokine genes. We investigated the association between the role tumor necrosis factor alpha (TNF-α), transforming growth factor-beta (TGF-β), interferon gamma (IFN-γ), interleukin (IL)-10 and IL-6 gene polymorphisms and early graft rejection among liver transplant recipients. Forty-three liver transplant recipients enrolled in this study were divided into 2 groups based on events in the first 2 months posttransplantations, namely, those experiencing at least 1 rejection episode (n = 26) or those without any episode (n = 17). The allele or genotype frequencies of cytokine gene polymorphisms showed no difference between liver recipients with or without nonrejection. In conclusion, there was no significant correlation between early graft rejection and cytokine gene polymorphism of TNF-α, TGF-β, IL-10, IL-6, and IFN-γ in liver transplant recipients.Publication Low recurrence rate of hepatocellular carcinoma following ledipasvir and sofosbuvir treatment in a real-world chronic hepatitis C patients cohort(Wiley, 2019-06-01) İdilman, Ramazan; Demir, Mehmet; Aladağ, Murat; Erol, Cihan; Çavuş, Bilger; İliaz, Raim; Köklü, Hayrettin; Çakaloğlu, Yılmaz; Şahin, Memduh; Ersöz, Galip; Köksal, İftihar; Karasu, Zeki; Özgenel, Meriç; Turan, İlker; Gündüz, Feyza; Ataseven, Hüseyin; Akdoğan, Meral; Kıyıcı, Murat; Köksal, Aydın Şeref; Akhan, Sila; Günsar, Fülya; Tabak, Fehmi; Kaymakoglu, Sabahattin; Akarca, Ulus S.; Akarsu, Mesut; Alkim, Hüseyin; Araz, Filiz; Ateş, Fehmi; Aygen, Bilgehan; Balık, İsmail; Barut, Hüseyin S.; Baysal, Birol; Bolat, Aylin; Çelik, İlhami; Coşgun, Süleyman; Ensaroglu, Fatih; Gökcan, Hale; Gürel, Selim; Gürsoy, Şebnem; İnkaya, Ahmet Çağan; Kamilli, Cemil; Kav, Taylan; Kuruüzüm, Ziya; Önder, Fatih O.; Örmeci, Necati; Özbakır, Ömer; Özenirler, Seren; Özer, Birol; Özkan, Hasan; Poturoğlu, Şule; Senates, Ebubekir; Şimşek, Halis; Toka, Bilal; Ünal, Hakan; Yaras, Serkan; Yıldırım, Abdullah E.; Yıldırım, Beytullah; Yılmaz, Bülent; Yılmaz, Hasan; Yozgat, Ahmet; Yurdaydın, Cihan; Early Access Program EAP Study Grp; KIYICI, MURAT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji Anabilim Dalı; 0000-0002-3208-6211; AAI-4213-2021The aims of the present study were to evaluate the efficacy and tolerability of ledipasvir/sofosbuvir (LDV/SOF) with or without ribavirin in the treatment of chronic hepatitis C (CHC) in patients with advanced liver disease and to analyse whether the use of LDV/SOF treatment is associated with a new occurrence of hepatocellular carcinoma (HCC) during and after LDV/SOF treatment. The Turkish Early Access Program provided LDV/SOF treatment to a total of 200 eligible CHC patients with advanced liver disease. The median follow-up period was 22months. All patients were Caucasian, 84% were infected with genotype 1b, and 24% had a liver transplantation before treatment. The sustained virological response (SVR12) was 86.0% with ITT analysis. SVR12 was similar among patients with Child-Pugh classes A, B and C disease and transplant recipients. From baseline to SVR12, serum ALT level and MELD score were significantly improved (P<0.001). LDV/SOF treatment was generally well tolerated. Only one patient developed a new diagnosed HCC. Seventeen of the 35 patients, who had a history of previous HCC, developed HCC recurrence during the LDV/SOF treatment or by a median follow-up of 6months after treatment. HCC recurrence was less commonly observed in patients who received curative treatment for HCC compared with those patients who received noncurative treatment (P=0.007). In conclusion, LDV/SOF with or without ribavirin is an effective and tolerable treatment in CHC patients with advanced liver disease. Eradication is associated with improvements in liver function and a reduced risk of developing a new occurrence of HCC.Ledipasvir and sofosbuvir with or without ribavirin is an effective and tolerable treatment in hepatitis C virus-infected patients with advanced liver disease. Eradication is associated with improvements in liver function and reduces the risk of developing a new occurrence of hepatocellular carcinoma.Publication Real-world efficacy and safety of Ledipasvir plus Sofosbuvir and Ombitasvir/Paritaprevir/Ritonavir ± Dasabuvir combination therapies for chronic hepatitis C: A Turkish experience(Aves, 2020-10-09) Değertekin, Bülent; Demir, Mehmet; Akarca, Ulus S.; Kani, Haluk Tarık; Üçbilek, Enver; Yıldırım, Emre; Güzelbulut, Fatih; Balkan, Ayhan; Vatansever, Sezgin; Danış, Nilay; Demircan, Melek; Soylu, Aliye; Yaras, Serkan; Kartal, Aysun; Kefeli, Ayşe; Gündüz, Feyza; Yalçın, Kendal; Erarslan, Elife; Aladağ, Murat; Harputluoğlu, Murat; Özakyol, Ayşegül; Temel, Tuncer; Akarsu, Mesut; Sümer, Hale; Akın, Mete; Albayrak, Bülent; Şen, İlker; Alkim, Hüseyin; Uyanıkoğlu, Ahmet; Irak, Kader; Öztaşkın, Sinem; Uğurlu, Çağrı Burak; Güneş, Şevkican; Gürel, Selim; Nuriyev, Kenan; İnci, İsmail; Kaçar, Sabite; Dinçer, Dinç; Doğanay, Levent; Göktürk, Hüseyin Savaş; Mert, Ali; Coşar, Arif Mansur; Dursun, Hakan; Atalay, Roni; Akbulut, Sabiye; Balkan, Yasemin; Koklu, Hayrettin; Şimşek, Halis; Özdoğan, Osman; Çoban, Mehmet; Poturoğlu, Şule; Ayyıldız, Talat; Yapalı, Suna; Günşar, Fulya; Akdoğan, Meral; Özenirler, Seren; Akyıldız, Murat; Sezgin, Orhan; Özdoğan, Osman; Kaymakoğlu, Sabahattin; Besişik, Fatih; Karasu, Zeki; Idılman, Ramazan; GÜREL, SELİM; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji ve Hepatoloji Anabilim Dalı.; 0000-0002-7279-2161; HLH-8209-2023Background/Aims: This study aimed to evaluate the real-life efficacy and tolerability of direct-acting antiviral treatments for patients with chronic hepatitis C (CHC) with/without cirrhosis in the Turkish population.Material and Methods: A total of 4,352 patients with CHC from 36 different institutions in Turkey were enrolled. They received ledipasvir (LDV) and sofosbuvir (SOF)+/- ribavirin (RBV) ombitasvir/paritaprevir/ritonavir +/- dasabuvir (PrOD)+/- RBV for 12 or 24 weeks. Sustained virologic response (SVR) rates, factors affecting SVR, safety profile, and hepatocellular cancer (HCC) occurrence were analyzed.Results: SVR12 was achieved in 92.8% of the patients (4,040/4,352) according to intention-to-treat and in 98.3% of the patients (4,040/4,108) according to per-protocol analysis. The SVR12 rates were similar between the treatment regimens (97.2%-100%) and genotypes (95.6%-100%). Patients achieving SVR showed a significant decrease in the mean serum alanine transaminase (ALT) levels (50.90 +/- 54.60 U/L to 17.00 +/- 14.50 U/L) and model for end-stage liver disease (MELD) scores (7.51 +/- 4.54 to 7.32 +/- 3.40) (p<0.05). Of the patients, 2 were diagnosed with HCC during the treatment and 14 were diagnosed with HCC 37.0 +/- 16.0 weeks post-treatment. Higher initial MELD score (odds ratio [OR]: 1.92, 95% confidence interval [CI]: 1.22-2.38; p=0.023]), higher hepatitis C virus (HCV) RNA levels (OR: 1.44, 95% CI: 1.31-2.28; p=0.038), and higher serum ALT levels (OR: 1.38, 95% CI: 1.21-1.83; p=0.042) were associated with poor SVR12. The most common adverse events were fatigue (12.6%), pruritis (7.3%), increased serum ALT (4.7%) and bilirubin (3.8%) levels, and anemia (3.1%).Conclusion: LDV/SOF or PrOD +/- RBV were effective and tolerable treatments for patients with CHC and with or without advanced liver disease before and after liver transplantation. Although HCV eradication improves the liver function, there is a risk of developing HCC.Publication Recommendations for hepatitis B immunoglobulin and antiviral prophylaxis against hepatitis B recurrence after liver transplantation(Aves, 2021-08-31) Akarsu, Mesut; Önem, Soner; Turan, İlker; Adalı, Gupse; Akdoğan, Meral; Akyıldız, Murat; Aladağ, Murat; Balaban, Yasemin; Danış, Nilay; Dayangaç, Murat; Gençdal, Genco; Gökcan, Hale; Sertesen, Elif; Gürakar, Merve; Harputluoğlu, Murat; Kabacam, Gökhan; Karademir, Sedat; Kıyıcı, Murat; Idılman, Ramazan; Karasu, Zeki; KIYICI, MURAT; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji Anabilim Dalı.; 0000-0002-3208-6211; FHW-0015-2022The combination of hepatitis B immunoglobulin and potent nucleos(t)ide analogs after liver transplantation is considered as the standard of care for prophylaxis against hepatitis B virus recurrence. However, the recommended doses, route of administration, and duration of HBIG administration remain unclear. Moreover, hepatitis B immunoglobulin-free prophylaxis with potent nucleos(t)ide analogs has shown promising disease outcomes in preventing hepatitis B virus recurrence. The current recommendations, produced by the Turkish Association for the Study of the Liver, Acute Liver Failure and Liver Transplantation Special Interest Group, suggest a reduced need for hepatitis B immunoglobulin administration with effective long-term suppression of hepatitis B virus replication using potent nucleos(t)ide analogs after liver transplantation.Item Recurrence and occurrence of hepatocellular carcinoma following ledipasvir and sofosbuvir treatment for chronic hepatitis C in patients with advanced liver disease: Turkish multi-center early access program(Elsevier, 2018-04) İdilman, Ramazan; Demir, Mehmet; Aladağ, Murat; Kaymakoğlu, Sabahattin; Erol, Cihan; Çavuş, Bilger; İliaz, Raim; Akarca, Ulus S.; Köklü, Seyfettin; Çakaloğlu, Yılmaz; Şahin, M.; Köksal, I.; Özgenel, Meriç; Toka, Bilal; Karasu, Zeki; Ersöz, Galip; Akdoğan, Meral; Kıyıcı, Murat; Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji Anabilim Dalı.; AAI-4213-2021