Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

Browse

Filters

2014 - 20182

Settings

Author: search.filters.author.Akhan, Sila

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Comparison of Haematologic Side Effects of Different Pegylated Interferon-α Molecules Combined With Ribavirin
    (2014) Aydin, Mehtap; Aksoz, Elif; Korkut, Oguzhan; Akhan, Sila; https://orcid.org/0000-0003-4044-9366; HLX-0937-2023
    Objective: Treatment of chronic hepatitis C virus (HCV) infection with pegylated interferon (PegIFN) and ribavirin causes haematological side effects such as anemia, neutropenia and trombocytopenia. This study aimed to evaluate and compare the haematological side effects of PegIFN alpha-2a and PegIFN alpha-2b with ribavirin in the treatment of chronic HCV infection. Methods: 103 patients treated with PegIFN alpha-2b plus ribavirin and 70 patients treated with PegIFN alpha-2a plus ribavirin were included in this retrospective study. Patients' haematological parameters in first and third month's visits were compared with pretreatment test results. Results: In all patients, 21.2% had anemia (haemoglobin <10 g/dL), 3.8% had neutropenia (<750/mm(3)) and 6.2% had thrombocytopenia (<75x10(9)/L) at the end of the third month. When compared with initial levels, significant decreases in haemoglobin, neutrophil and thrombocyte counts were observed at first and third months in both groups. There wasn't a significant decrease in thrombocyte counts in the first month between two groups, however, a more significant decrease in thrombocyte counts were observed in patients who received PegIFN alpha-2a plus ribavirin than the patients receiving PegIFN alpha-2b plus ribavirin during the third month. Conclusions: PegIFN alpha-2b seems to have similar haematologic side effects, compared with PegIFN alpha-2a except the effects on the thrombocyte counts during the third month.
  • Thumbnail Image
    Item
    Molecular Characterization of Drug Resistance in Hepatitis B Viruses Isolated from Patients with Chronical Infection in Turkey
    (2018) Aydin, Mehtap; Asan, Ali; Sayan, Murat; Akhan, Sila; Koruk, Suda Tekin; Aygen, Bilgehan; Sirmatel, Fatma; Eraksoy, Haluk; Tuna, Nazan; Kose, Sukran; Kaya, Ali; Tulek, Necla Eren; Demir, Nazlim Aktug; Mistik, Resit; Ormen, Bahar; Korkmaz, Fatime; Yildirmak, Taner; Ural, Onur; Turgut, Huseyin; Gunal, Ozgur; Demirtuk, Nese
    Background: Hepatitis B virus (HBV) has a high mutation rate due to its unusual replication strategy leading to the production of a large number of virions with single and double mutations. The mutations, in turn, are associated with the development of drug resistance to nucleos(t)ide analogs (NUCs) in patients before and during NUCs therapy. Objectives: The current study aimed at investigating the molecular characterization of HBV in Turkish patients with chronic hepatitis B (CHB) infection. Methods: Polymerase chain reaction (PCR) amplification and direct sequencing procedures were used to analyze mutations. The detected drug resistance mutations were divided into the nucleos(t) ide analogs primary, partial, and compensatory resistance groups. The amino acid substitutions of hepatitis B surface antigen (HBsAg) were categorized into antiviral drug - associated potential vaccine-escape mutations (ADAPVEMs) and typical HBsAg amino acid substitutions, which included hepatitis B hyperimmunoglobulin (HBIg) - selected escape mutation, vaccine escape mutation, hepatitis B misdiagnosis, and immune - selected amino acid substitutions. Results: The number of patients included in the study was 528 out of which 271 (51.3%) were treatment - naive and 351 (66.3%) were hepatitis B e antigen (HBeAg) - negative. Moreover, 325 (61.6%) were males with a mean age of 38 years (range: 18 - 69). Primary, partial, and compensatory resistance to NUCs was reported in 174 (32.9%) patients. Six different ADAPVEM motifs were determined in both treatment - naive and treatment - experienced patients, namely, sF161L/rtI169X, sE164D/rtV173L, sL172L/rtA181T, sL173F/rtA181V, sS195M/rtM204V, and sS196L/rtM204I. The prevalence of ADAPVEMs and typical HBsAg escape mutations was 5.3% (n = 28) and 34.8% (n = 184), respectively. Conclusions: The analysis of drug resistance should constitute a fundamental part of the follow - up period of patients with CHB undergone treatment with NUCs. The surveillance of development of drug resistance mutations, while receiving treatment for hepatitis B is of paramount importance to monitor and control the emerging resistance.