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https://www.readbyqxmd.com/read/28228595/hepatitis-c-virus-specific-t-cell-receptor-mrna-engineered-human-t-cells-impact-of-antigen-specificity-on-functional-properties
#1
Anangi Balasiddaiah, Haleh Davanian, Soo Aleman, Anna Pasetto, Lars Frelin, Matti Sällberg, Volker Lohmann, Sarene Koh, Antonio Bertoletti, Margaret Chen
Therapy with genetically modified autologous T cells has shown great promise in cancer therapy. For an efficient control of hepatitis C virus (HCV) infection, cytotoxic T cells (CTL) are pivotal but persistence of activated T cells may lead to liver toxicity. Here, anti-HCV T cell receptors (TCRs) recognising the HCV non-structural (NS) NS3 or NS5 viral peptide target were examined by mRNA transfection of human peripheral blood lymphocytes (PBL) derived from healthy donors as well as chronically infected HCV patients...
February 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28224470/three-patients-treated-with-sofosbuvir-plus-ledipasvir-for-recurrent-hepatitis-c-after-liver-transplantation
#2
Tomokazu Kawaoka, Michio Imamura, Kei Morio, Yuki Nakamura, Masataka Tsuge, Clair Nelson Hayes, Yoshiiku Kawakami, Hiroshi Aikata, Hidenori Ochi, Kouhei Ishiyama, Hideki Ohdan, Kazuaki Chayama
We previously reported results of interferon (IFN)-free daclatasvir and asunaprevir for the treatment of recurrent hepatitis C virus (HCV) genotype 1 infection after liver transplantation (LT). Here we report three patients who achieved viral response with no effect on the blood concentrations of immunosuppressive agents following sofosbuvir plus ledipasvir treatment. The first patient was a 68-year-old female with HCV-related liver cirrhosis who failed to respond to pegylated-IFN and ribavirin (PEG-IFN/RBV) after living donor LT...
February 21, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28222792/seroprevalence-of-hepatitis-b-hepatitis-c-human-immunodeficiency-virus-treponema-pallidum-and-co-infections-among-blood-donors-in-kyrgyzstan-a-retrospective-analysis-2013-2015
#3
Bakyt B Karabaev, Nurgul J Beisheeva, Aiganysh B Satybaldieva, Aikul D Ismailova, Frank Pessler, Manas K Akmatov
BACKGROUND: Post-Soviet Kyrgyzstan has experienced a major surge in blood-borne infections, but data from adequately powered, up-to-date studies are lacking. We thus examined a) the seroprevalences of hepatitis B virus surface antigen (HBsAg), HIV-1 p24 antigen and antibodies against hepatitis C virus (anti-HCV), human immunodeficiency viruses (anti-HIV-1/2, HIV-1 group O), and Treponema pallidum among blood donors in Kyrgyzstan and assess their distribution according to sex, age, and provinces of residence; b) trends in the respective seroprevalences; and c) co-infection rates among the pathogens studied...
February 21, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28208127/prevalence-of-occult-hepatitis-c-virus-infection-among-blood-donors-in-jiangsu-china
#4
Hong Lin, Xian Chen, Shaowen Zhu, Ping Mao, Shanshan Zhu, Yanchun Liu, Chengyin Huang, Jun Sun, Jin Zhu
OBJECTIVE: In 2010, only 1 donor blood sample was found to be anti-hepatitis C virus (HCV) negative and HCV RNA positive, as detected by nucleic acid testing. In occult HCV infection (OCI), HCV RNA is found in peripheral blood mononuclear cells (PBMCs). We investigated the prevalence of OCI among blood donors. METHODS: We collected 513 samples from 334 eligible and 179 deferred donors, including 55 anti-HCV-positive, 113 alanine aminotransferase (ALT)-elevated, and 11 hepatitis B virus surface antigen (HBsAg)-positive blood donors...
February 17, 2017: Intervirology
https://www.readbyqxmd.com/read/28191540/hepatitis-c-in-cameroon-what-is-the-progress-from-2001-to-2016
#5
Borris Rosnay Tietcheu Galani, Richard Njouom, Paul Fewou Moundipa
Chronic hepatitis C is a major public health problem in sub-Saharan countries and particularly in Cameroon where the prevalence rate is around 7.6% in the age group of 55-59 years. Recent investigations into this infection allowed defining a national seroprevalence, characterizing virological and biological profiles of infected patients and identifying medicinal plants of potential interest in hepatitis C therapy. However, in Cameroon, no existing report currently presents a good overview of hepatitis C research in relation to these parameters...
December 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28164540/level-of-human-antibodies-targeting-hcv-e1-e2-peptides-and-spontaneous-clearance-of-hcv-in-blood-donors
#6
Ashraf A Tabll, Eman A Salem, Yasmine S El-Abd, Reem M El-Shenawy, Amr Saad, Sanaa O Abdallah, Reham M Dawood, Mostafa K El-Awady
BACKGROUND: Hepatitis C virus (HCV) is a major health problem worldwide particularly in Egypt. The humoral immune response has an important function in the control of HCV infection. The aim of this study was to investigate the role of neutralizing antibodies in Hepatitis C Virus (HCV) clearance in infected individuals. METHODS: This study was carried out on apparently healthy blood donors (n = 200). Detectable HCV antibodies were assessed by commercial ELISA and specific human immunoglobulins targeting peptides derived from HCV E1/E2 glycoproteins were measured in donors' blood using an in house optimized ELISA...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164313/the-characteristics-of-hepatitis%C3%A2-b-surface-antigen-hbsag-negative-hepatitis%C3%A2-b-virus-hbv-infection-in-chinese-blood-donors-a-follow-up-study-of-donors-tested-negative-for-hbsag-and-reactive-for-simultaneous-nucleic-acid-testing-of-hbv-hepatitis%C3%A2-c-virus-and
#7
Zhaofu Guo, Ping Fu, Yijin Yin, Funeng Wang, Yiqing Yin, Jingxing Wang, Yu Liu
BACKGROUND: The real infection status of hepatitis B virus (HBV) of hepatitis B surface antigen (HBsAg)-negative yet nucleic acid test (NAT)-positive blood donors is difficult to clarify. Detailed follow-up study is needed for analyzing the infectivity of these blood donors. STUDY DESIGN AND METHODS: Blood donors who screened negative for HBsAg and reactive for simultaneous NAT of HBV, hepatitis C virus (HCV), and human immunodeficiency virus (HIV) were included in a follow-up epidemiologic questionnaire survey and contributed follow-up samples for further testing...
February 5, 2017: Transfusion
https://www.readbyqxmd.com/read/28160727/high-seroprevalence-against-hepatitis-e-virus-in-patients-with-chronic-hepatitis-c-virus-infection
#8
Åsa Mellgren, Miriam Karlsson, Marie Karlsson, Martin Lagging, Rune Wejstål, Heléne Norder
BACKGROUND: Hepatitis E virus (HEV) genotype 3 is endemic in Europe. Superinfection with HEV in patients with underlying chronic liver disease can cause hepatic decompensation leading to increased morbidity and mortality. OBJECTIVES: The prevalence of anti-HEV antibodies was investigated in 204 patients with chronic hepatitis C virus (HCV) infection and different stages of fibrosis. STUDY DESIGN: Sera were analyzed for anti-HEV IgG, IgM and HEV RNA...
March 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28132048/-donation-and-some-problems-of-defect-of-donor-s-blood
#9
K Tashtemirov, S Imangazinov, O Tashtemirova, V Egoshin
There was analyzed the prevalence of transfusion-transmissible infections among blood donors and its components by examining the monitoring of donor withdrawal to donations, the absolute structure of defect in the Blood Center of Pavlodar region (BCPR) of the Republic of Kazakhstan. The results quality was ensured by the compliance of the rules and conditions of the analytical and post analytical stages of the internal quality control. It is shown that the need to improve the work of a single donor's information center (EDITS), because Only 11...
December 2016: Georgian Medical News
https://www.readbyqxmd.com/read/28125559/o-011-low-dose-il-2-administration-expands-human-regulatory-t-cells-in-patients-with-uc-and-humanized-mice-and-protects-against-experimental-colitis
#10
Jeremy Goettel, Daniel Kotlarz, David Illig, James Canavan, Jessica Allegretti, Matthew Hamilton, Ryan Kelly, Alexandra Griffith, Madeline Carellas, Anastasia Nelina, Athos Bousvaros, Joshua Korzenik, Scott Snapper
BACKGROUND: Treg dysfunction or deficiency results in unopposed immune activation and autoimmunity. Interleukin-2 (IL-2) is critical for the expansion, suppressive function, and maintenance of Tregs. Although conventional T cells and NK cells respond to IL-2, Tregs are more sensitive to lower concentrations of IL-2 due to constitutive expression of CD25, the high affinity IL-2 receptor. Low-dose IL-2 therapies have shown to preferentially expand Tregs and ameliorate manifestations of graft versus host disease (Koreth et al...
February 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28121005/seroepidemiology-of-hepatitis-b-and-c-virus-infections-among-blood-donors-in-ethiopia
#11
Gadissa Bedada Hundie, V Stalin Raj, Daniel Gebre Michael, Bart L Haagmans
This study was conducted to investigate the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) infections among blood donors in different regions in Ethiopia. A total of 56,885 sera were tested for HBsAg and anti-HCV antibodies. Of these, 3.9% were found HBsAg-positive, 0.52% anti-HCV-positive and 0.054% dual positive. HBV prevalence was relatively higher in Adama (5.91%) than Gondar (4.05%), Jimma (3.87%), Addis Ababa (3.75%), and Tigray (3.7%); and in males (4.64%) than females (2.1%). Overall, HBV and HCV prevalence increased with age...
January 25, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28118096/hepatitis-c-virus-and-interferon-free-antiviral-therapeutics-revolution-implications-for-pakistan
#12
Muhammad Sohail Afzal
Hepatitis C virus (HCV) is a major health concern worldwide as a leading cause of liver-related mortalities and morbidities. Pakistan ranks second among countries with endemic HCV infection; ∼11 million cases are reported so far. HCV burden is continuously rising in Pakistan, mainly because of unsafe blood transfusions, surgical procedures, dental procedures, untrained clinicians, reuse of syringes, barbers, and ear/nose piercing tools. Lack of awareness about HCV transmission routes among the general and high-risk population is a major hurdle in disease management...
January 24, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28114346/hepatitis-c-virus-induces-mdscs-like-monocytes-through-tlr2-pi3k-akt-stat3-signaling
#13
Naicui Zhai, Haijun Li, Hongxiao Song, Yang Yang, An Cui, Tianyang Li, Junqi Niu, Ian Nicholas Crispe, Lishan Su, Zhengkun Tu
BACKGROUND AND AIMS: Recent studies reveal the accumulation of myeloid derived suppressor cells (MDSCs) in human peripheral blood mononuclear cells (PBMCs) following HCV infection, which may facilitate and maintain HCV persistent infection. The mechanisms by which HCV induces MDSCs are poorly understood. In the present study, we investigated the mechanisms by which HCV induces MDSCs that lead to suppression of T cell proliferation and expansion of CD4+Foxp3+ regulatory T cells. METHODS: Purified monocytes from healthy donors were cultured with HCV core protein (HCVc) or cell culture-derived HCV virions (HCVcc), and characterized the phenotype and function of these monocytes by flow cytometry, quantitative PCR, ELISA and western blot assays...
2017: PloS One
https://www.readbyqxmd.com/read/28070197/a-survey-on-the-prevalence-of-depression-in-blood-donors-with-hepatitis-c-in-shiraz
#14
Leila Kasraian, Neda Negarestani, Mohammad Hossein Karimi, Sahar Dehbidi
BACKGROUND: Depression is the most common psychiatric disorder associated with hepatitis C. OBJECTIVES: This study aimed to survey the prevalence rate of depression in patients with Hepatitis C Virus (HCV) before they were aware of their HCV test result. METHODS: This cross-sectional study was conducted on all blood donors with confirmed positive HCV test results who donated blood between March 21, 2012 to March 21, 2013 at Fars blood transfusion center in Iran as case group and age- and sex-matched blood donors with negative screening test results as control group...
November 2016: Hepatitis Monthly
https://www.readbyqxmd.com/read/28041821/nat-positivity-in-seronegative-voluntary-blood-donors-from-western-india
#15
Kanchan K Mishra, Apeksha Trivedi, Sheetal Sosa, Krima Patel, Kanjaksha Ghosh
BACKGROUND AND OBJECTIVES: Prevalence and composition of Hepatitis B, Hepatitis C and HIV-1, NAT positive but seronegative voluntary blood donors from western part of India is yet to be documented. MATERIAL AND METHODS: Over last 2 1/2 years all the seronegative voluntary blood donors were tested using 10 minipools on a semiautomated NAT testing platform. The positively tested donors were followed up for at least five months for development of seropositivity. RESULTS: 79532 seronegative donations were tested by 10 minipool (MP) NAT leading to 51 positive sample (44 Hep B, 5 HIV 1 and Hep C positive)...
December 13, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28031027/prevalence-of-anelloviruses-ttv-ttmdv-and-ttmv-in-healthy-blood-donors-and-in-patients-infected-with-hbv-or-hcv-in-qatar
#16
Ahmed A Al-Qahtani, Enas S Alabsi, Raed AbuOdeh, Lukman Thalib, Gheyath K Nasrallah
BACKGROUND: Anelloviruses (TTV, TTMV, and TTMDV) have been associated with non A-G hepatitis. The goal of the current study was to estimate the prevalence of these anelloviruses in Qatar. METHODS: A total of 607 blood samples (500 healthy donors, and 53 HBV-and 54 HCV-positive patients) representing different nationalities were tested for the presence of TTV, TTMV, and TTMDV DNA by nested PCR. RESULTS: Prevalence rates for the three viruses were high in all studied groups, and exceeding 95% in the HBV group (for TTV and TTMDV)...
December 28, 2016: Virology Journal
https://www.readbyqxmd.com/read/28028295/current-trends-of-seroprevalence-of-transfusion-transmitted-infections-in-pakistani-%C3%AE-thalassaemic-patients
#17
S Sultan, S M Irfan, M Siddiqui, S M H Zaidi
BACKGROUND: Though regular blood transfusion improves the survival, it carries the unavoidable risk of transfusion transmitted infections (TTI) in β-thalassaemic patients. Owing to the lack of uniformity in blood screening practices in Pakistan, TTI is still a major challenge. OBJECTIVES: To study the current trends of TTI in regularly transfused β-thalassaemics and their correlation with age, number of transfusions, hematological and biochemical markers. METHODS: We carried out a prospective case-control study...
December 2016: Malaysian Journal of Pathology
https://www.readbyqxmd.com/read/28018760/early-results-of-pilot-study-using-hepatitis-c-virus-hcv-positive-kidneys-to-transplant-hcv-infected-patients-with-end-stage-renal-disease-allowing-for-successful-interferon-free-direct-acting-antiviral-therapy-after-transplantation
#18
Juan F Gallegos-Orozco, Robin Kim, Heather F Thiesset, Jenny Hatch, Keisa Lynch, Thomas Chaly, Fuad Shihab, Faris Ahmed, Isaac Hall, Jeffrey Campsen
INTRODUCTION: Hepatitis C virus (HCV) infection in kidney transplant (KTX) patients reduces long-term patient and graft survival. Direct-acting antivirals (DAA) are > 90% effective in achieving sustained viral response (SVR); however, DAAs are not routinely available to patients with end-stage renal disease (ESRD). The University of Utah Transplant Program developed a protocol to allow HCV-positive potential KTX recipients to accept HCV-positive donors' kidneys. Three months after successful KTX, they were eligible for DAA therapy...
November 22, 2016: Curēus
https://www.readbyqxmd.com/read/28009328/seroprevalence-and-diagnosis-of-hiv-hbv-hcv-and-syphilis-infections-among-blood-donors
#19
Tadesse Bekele Tafesse, Addis Adera Gebru, Semgne Gobalee, Gosaye Degu Belay, Molla Teferi Belew, Demelash Ataro, Belay Ali Ebrahim, Getachew Mekonnon Shebeshi, Yonas Yimam
BACKGROUND: Blood transfusion is one of the most important therapeutic options of life-saving intervention for recipients who are in diseased or non-diseased conditions with severe blood loss. However, it is associated with certain risks which can lead to adverse consequences that may cause acute or delayed complications and bring the risk of transfusion-transmissible infections including HIV, Hepatitis B & C and Syphilis. So, there might be a fatal risk instead of life saving. This paper aims to provide a comprehensive and reliable tabulation of available data on seroprevalence and diagnosis of HIV, HBV, HCV and Syphilis infections among blood donors...
2017: Human Antibodies
https://www.readbyqxmd.com/read/27996693/assessment-of-semi-automated-nucleic-acid-testing-programme-in-a-regional-blood-transfusion-centre
#20
Kanjaksha Ghosh, Kanchan Kumar Mishra, Apeksha Trivedi, Sheetal Sosa, Krima Patel
BACKGROUND: Detection of human immunodeficiency virus type-1 (HIV-1), hepatitis-C (HCV) and hepatitis-B virus (HBV) in the blood donors is crucial. An efficient form of detection is nucleic acid testing (NAT) in blood screening. We assessed the suitability of commercial NAT testing in a developing country, focusing on the Altona RealStar assay and the method of Sacace Biotechnologies. METHODS: We have standardised and validated commercially available NAT kits with a semi-automated system for detection of HBV, HCV and HIV-1 in blood donations...
December 20, 2016: British Journal of Biomedical Science
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