Publications by authors named "Kendal Yalcin"

Background & Aims: Until recently, pegylated interferon-alfa-2a (PEG-IFNa) therapy was the only treatment option for patients infected with hepatitis D virus (HDV). Treatment with PEG-IFNa with or without tenofovir disoproxil fumarate (TDF) for 96 weeks resulted in HDV RNA suppression in 44% of patients at the end of therapy but did not prevent short-term relapses within 24 weeks. The virological and clinical long-term effects after prolonged PEG-IFNa-based treatment of hepatitis D are unknown.

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Background & Aims: Infection with the hepatitis D virus (HDV) causes the most severe form of viral hepatitis with a high risk to develop clinical complications of liver disease. In addition, hepatitis delta has been shown to be associated with worse patient-reported outcomes. Until recently, only pegylated interferon alfa could be used to treat hepatitis delta.

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Article Synopsis
  • The study investigated the link between serum HBsAg levels and liver fibrosis in patients with chronic hepatitis delta virus (HDV) infection.
  • It included 98 patients (53 noncirrhotic, 45 cirrhotic) and found significant correlations between HBsAg levels, HDV RNA, and liver enzymes, especially in noncirrhotic individuals.
  • The researchers concluded that quantitative HBsAg levels could serve as useful indicators of viral activity and histological changes in noncirrhotic HDV patients, aiding in chronic infection management.
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Background And Aim: Several studies have suggested that treatment with direct-acting antivirals (DAAs) in patients with chronic hepatitis C virus (HCV) may be associated with an increased risk of developing hepatocellular carcinoma (HCC). We investigated the incidence and risk factors of HCC in HCV patients who achieved a sustained virologic response (SVR) following DAA therapies.

Materials And Methods: The medical data of patients who were diagnosed with HCV and received DAA therapy in two tertiary centers in Turkey were retrospectively collected.

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Brucellosis is a zoonotic infection that may involve the liver in a variety of ways, however, data on the histopathology of liver effects in brucellosis are limited. Brucellosis is generally characterized by a high fever, joint or back pain, and hepatosplenomegaly. This report illustrates a case of granulomatous hepatitis with granulomas in the liver and bone marrow in a patient who presented with non-specific symptoms, hepatomegaly, splenomegaly, digital clubbing, and laboratory signs of intrahepatic cholestasis.

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Article Synopsis
  • The study aimed to analyze the epidemiological and clinical characteristics of newly diagnosed hepatocellular carcinoma (HCC) patients in Turkey, focusing on potential risk and prognostic factors.
  • A total of 547 patients were examined, revealing that Hepatitis B virus (HBV) was the most common cause of HCC, with many patients presenting with large tumors and advanced stages of the disease.
  • The findings indicated that over half of the patients were diagnosed with moderate-to-advanced HCC, while those diagnosed during follow-up had smaller tumors and earlier stages of the disease.
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Background And Aim: In this study, we aimed to perform a comprehensive analysis of patients with acute hepatic flares observed during the course of chronic hepatitis B infection in order to provide early diagnosis, management, and best characterization of this unique group of hepatitis B patients.

Patients And Methods: The study was designed in a retrospective and prospective manner. Chronic hepatitis B patients with acute hepatic flares, admitted to the Department of Gastroenterology and Hepatology were enrolled in the study.

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Background/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) orombitasvir/paritaprevir/ritonavir±dasabuvir (PrOD)±RBV for 12 or 24 weeks.

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The role of low levels of HDV-RNA during and after interferon therapy of hepatitis D is unknown. We re-analysed HDV RNA in 372 samples collected in the HIDIT-2 trial (Wedemeyer et al, Lancet Infectious Diseases 2019) with the Robogene assay (RA; Jena Analytics). Data were compared with the previously reported in-house assay (IA).

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HBV-DNA levels are low or even undetectable in the majority HDV-infected patients. The impact of PEG-IFNα on HBV-DNA kinetics in HDV-infected patients has not been studied in detail. We analysed data of a prospective treatment trial where 120 HDV-RNA-positive patients were randomized to receive PEG-IFNα-2a plus tenofovir-disoproxil-fumarate (PEG-IFNα/TDF, n = 59) or placebo (PEG-IFNα/PBO; n = 61) for 96 weeks.

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Hepatitis delta virus (HDV) infection causes the most severe form of viral hepatitis. PEG-interferon alpha-2a (PEG-IFNα-2a) is the only effective treatment but its long-term clinical impact is unclear. The aim of this study was to investigate the long-term outcome after 48 weeks of pegylated interferon alpha-2a therapy.

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Introduction: Hepatocellular carcinoma is associated with several chronic inflammatory conditions. It is increasingly understood that the inflammation may be part of the carcinogenic process and prognostically important.

Objective: To evaluate the serum levels of three inflammation markers in relation to survival in HCC patients.

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Background: Hepatitis D is the most severe form of chronic viral hepatitis. Treatment guidelines recommend 1 year of peginterferon alfa, which is effective in 25-30% of patients only. Whether prolonged therapy with peginterferon alfa-2a for 96 weeks and combination therapy with tenofovir disoproxil fumarate (TDF) would increase hepatitis D virus (HDV) RNA suppression is unknown.

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Article Synopsis
  • Several markers of systemic inflammation, such as C-reactive protein (CRP), platelet lymphocyte ratio (PLR), and neutrophil lymphocyte ratio (NLR), have been identified as important indicators for prognosis in hepatocellular carcinoma (HCC).
  • The study examined how these markers relate to key tumour characteristics like maximum tumour diameter, multifocality, portal vein thrombosis, and alpha-fetoprotein levels through statistical analysis.
  • Results indicated that CRP and PLR showed significant relationships with various tumour parameters, suggesting that the prognostic value of CRP and PLR may indicate tumour growth and invasiveness, while NLR did not show such significance.
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The hepatocellular carcinoma (HCC) tumor marker alpha-fetoprotein (AFP) is only elevated in about half of the HCC patients, limiting its usefulness in following the effects of therapy or screening. New markers are needed. It has been previously noted that the inflammation markers C-reactive protein (CRP) and platelet-lymphocyte ratio (PLR) are prognostically important and may reflect HCC aggressiveness.

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Macroscopic portal vein invasion (PVT) by hepatocellular carcinoma (HCC) in the liver is one of the most important negative prognostic factors for HCC patients. The characteristics of a large cohort of such patients were examined. We found that the percent of patients with PVT significantly increased with increasing maximum tumor diameter (MTD), from 13.

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C-reactive protein (CRP) is a blood marker for inflammation and is an independent prognostic factor for many human cancers. Combined with albumin levels, it forms the basis of the Glasgow Index for cancer prognosis. We reviewed the literature on CRP and HCC and also evaluated blood CRP levels and combination CRP plus albumin levels in a large HCC cohort.

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A large database of 1773 HCC patients in Turkey was examined. 41.9% had alpha-fetoprotein (AFP) levels <20 IU/ml and an additional 16.

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Background: The effect of hepatitis B virus (HBV) infection on fatty liver disease is unclear.

Objectives: The aim of this study was to investigate the viral and host causes of fatty liver in chronic hepatitis B (CHB) patients. This study included 88 CHB patients of which 17 were not treated.

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Background & Aims: Interferon is the only effective treatment for chronic hepatitis D virus (HDV) infection. No rules have been set for stopping treatment based on viral kinetics. We analyzed data from an international study of hepatitis D treatment to identify factors associated with outcomes of pegylated interferon treatment, with and without adefovir.

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Fascioliasis is an infectious disease caused by the hepatic trematodes Fasciola hepatica and Fasciola gigantica. Here, we report the case of Fasciola gigantica presenting with biliary obstruction and abdominal pain that was diagnosed and treated by endoscopic retrograde cholangiography (ERCP). A 46-year-old woman presented with right upper quadrant abdominal pain and jaundice.

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Background: Hepatitis delta frequently leads to liver cirrhosis and hepatic decompensation. As treatment options are limited, there is a need for biomarkers to determine disease activity and to predict the risk of disease progression. We hypothesized that anti-HDV IgM could represent such a marker.

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Background & Aims: Aim of this study was to investigate whether a potential association exists between several single nucleotide polymorphisms (SNPs) of the IL-28B gene (rs12979860, rs1188122, rs8099917, rs8105790, rs12980275) and HBsAg persistence. Further, a potential effect on the development of HBeAg-negative CHB vs. inactive HBsAg carrier state was assessed in a genotype D HBV cohort.

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Background: Hepatitis delta virus (HDV) RNA viral load measurement is critical in diagnosis and monitoring the response to antiviral treatment.

Objectives: Our aim is to design a real time PCR method for accurate quantitation of HDV RNA in clinical specimens using an armored RNA as external standard, and an intrinsic internal control.

Study Design: A plasmid bearing delta antigen region of genotype I HDV genome was used to develop an armored RNA.

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Unlabelled: Interferon alpha is the only treatment option for hepatitis delta virus (HDV). Trials investigating the efficacy of pegylated interferon alpha (PEG-IFNa) showed HDV RNA negativity rates of 25-30% 24 weeks after therapy. However, the clinical and virological long-term outcome of HDV-infected patients treated with PEG-IFNa is unknown.

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