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Immunology and hepatitis c

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https://www.readbyqxmd.com/read/27933174/a-case-of-hepatitis-c-associated-osteosclerosis-accelerated-bone-turnover-controlled-by-pulse-steroid-therapy
#1
Nobuhiro Miyamura, Shuhei Nishida, Mina Itasaka, Hirofumi Matsuda, Takeshi Ohtou, Yasuhiro Yamaguchi, Daisuke Inaba, Sadahiro Tamiya, Tetsuo Nakano
: Hepatitis C-associated osteosclerosis (HCAO), a very rare disorder in which an extremely rapid bone turnover occurs and results in osteosclerosis, was acknowledged in 1990s as a new clinical entity with the unique bone disorder and definite link to chronic type C hepatitis, although the pathogenesis still remains unknown. Affected patients suffer from excruciating deep bone pains. We report the 19th case of HCAO with diagnosis confirmed by bone biopsy, and treated initially with a bisphosphonate, next with corticosteroids and finally with direct acting antivirals (DAA: sofosbuvir and ribavirin) for HCV infection...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27928007/mice-expressing-minimally-humanized-cd81-and-occludin-genes-support-hepatitis-c-virus-uptake-in-vivo
#2
Qiang Ding, Markus von Schaewen, Gabriela Hrebikova, Brigitte Heller, Lisa Sandmann, Mario Plaas, Alexander Ploss
Hepatitis C virus (HCV) causes chronic infections in at least 150 million individuals world-wide. HCV has a narrow host range and robustly infects only humans and chimpanzees. The underlying mechanisms for this narrow host range are incompletely understood. At the level of entry differences in the amino acid sequences between the human and mouse orthologues of two essential host factors, the tetraspannin CD81 and the tight junction protein occludin (OCLN) explain at least in part HCV's limited ability to enter mouse hepatocytes...
December 7, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27916584/immunological-and-infectious-risk-factors-for-lung-cancer-in-us-veterans-with-hiv-a-longitudinal-cohort-study
#3
Keith Sigel, Juan Wisnivesky, Kristina Crothers, Kirsha Gordon, Sheldon T Brown, David Rimland, Maria C Rodriguez-Barradas, Cynthia Gibert, Matthew Bidwell Goetz, Roger Bedimo, Lesley S Park, Robert Dubrow
BACKGROUND: HIV infection is independently associated with risk of lung cancer, but few data exist for the relation between longitudinal measurements of immune function and lung-cancer risk in people living with HIV. METHODS: We followed up participants with HIV from the Veterans Aging Cohort Study for a minimum of 3 years between Jan 1, 1998, and Dec 31, 2012, and used cancer registry data to identify incident cases of lung cancer. The index date for each patient was the later of the date HIV care began or Jan 1, 1998...
December 1, 2016: Lancet HIV
https://www.readbyqxmd.com/read/27913223/hepatitis-e-virus-infection-beyond-the-liver
#4
REVIEW
S Pischke, J Hartl, S D Pas, A W Lohse, B C Jacobs, A A van der Eijk
Hepatitis E virus (HEV) infections are not limited to the liver but may also affect other organs. Several diseases, including Guillain-Barré syndrome, neuralgic amyotrophy, glomerulonephritis, cryoglobulinemia, pancreatitis, lymphoma, thrombopenia, meningitis, thyreoiditis and myocarditis have been observed in the context of hepatitis E. To date the definite pathophysiological links between HEV and extrahepatic manifestations are not yet established. However, it is suggested that HEV-infection might be causative based on serological studies, case series, in vitro data and animal models...
November 29, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27911488/hepatocellular-carcinoma-as-an-emerging-morbidity-in-the-thalassemia-syndromes-a-comprehensive-review
#5
REVIEW
Hassan M Moukhadder, Racha Halawi, Maria Domenica Cappellini, Ali T Taher
The incidence of hepatocellular carcinoma (HCC) in patients with thalassemia is on the rise. The 2 well recognized HCC risk factors in thalassemia are iron overload and chronic viral infection with hepatitis C. The carcinogenicity of iron is related to its induction of oxidative damage, which results in genotoxicity, and to immunologic dysregulation, which attenuates cancer immune surveillance. Chronic hepatitis B and C infections lead to necroinflammation, which can prompt progression to HCC, but an independent role of hepatitis B virus in hepatic carcinogenesis among patients with thalassemia has not been demonstrated...
December 1, 2016: Cancer
https://www.readbyqxmd.com/read/27869441/immunology-update-primary-immunodeficiency-diseases
#6
S Paul Starr
There are 264 primary immunodeficiencies (PIDs), most of which are rare. They are caused by complement deficiencies, defects in phagocyte function, impaired T-cell function, and/or impaired B-cell function with antibody deficiencies. Most patients with PIDs will present, at varying ages, with frequent infections. These infections can be common respiratory tract infections such as otitis media or pneumonia, or they can be unusual bacterial, fungal, or parasitic infections. Neonatal screening for severe combined immunodeficiency syndrome, one of the most common and serious PIDs, is now performed in most US states, but many PIDs manifest and are detected after birth...
November 2016: FP Essentials
https://www.readbyqxmd.com/read/27862491/alarmins-and-central-nervous-system-inflammation-in-hiv-associated-neurological-disorders
#7
M-L Gougeon
In the era of highly active antiretroviral therapy (HAART), HIV-1-associated neurocognitive disorders (HAND) persist in infected individuals with adequate immunological and virological status. Risk factors for cognitive impairment include hepatitis C virus co-infection, host genetic factors predisposing to HAND, the early establishment of the virus in the CNS and its persistence under HAART; thus, the CNS is an important reservoir for HIV. Microglial cells are permissive to HIV-1, and NLRP3 inflammasome-associated genes were found expressed in brains of HIV-1-infected persons, contributing to brain disease...
November 16, 2016: Journal of Internal Medicine
https://www.readbyqxmd.com/read/27832587/the-liver-at-the-nexus-of-host-microbial-interactions
#8
REVIEW
Andrew J Macpherson, Mathias Heikenwalder, Stephanie C Ganal-Vonarburg
The liver receives blood from the intestine, from the spleen, and directly from the heart and holds a vital position in vertebrate physiology. It plays a role in intermediary metabolism, bile secretion, maintaining blood sterility, serum homeostasis, xenobiotic detoxification, and immunological activity. This article provides our perspective on the liver as a nexus in establishing and maintaining host microbial mutualism. We discuss the role of the liver not only in sanitizing the blood stream from penetrant live microbes, but also in metabolizing xenobiotics that are synthesized or modified by intestinal microbes, and how microbiota modify the signaling potential of bile acids...
November 9, 2016: Cell Host & Microbe
https://www.readbyqxmd.com/read/27824263/virologic-and-immunologic-outcomes-in-hiv-infected-patients-with-cancer
#9
David James Riedel, Kristen A Stafford, Aparna Vadlamani, Robert R Redfield
BACKGROUND: Achievement and maintenance of virologic suppression after cancer diagnosis has been associated with improved outcomes in HIV-infected patients, but few studies have analyzed the virologic and immunologic outcomes after a cancer diagnosis. METHODS: All HIV-infected patients with a diagnosis of cancer between 2000 and 2011 in an urban clinic population in Baltimore, MD were included for review. HIV-related outcomes (HIV-1 RNA viral load and CD4 cell count) were abstracted and compared for patients with NADCs and ADCs...
November 8, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/27800130/the-association-between-viral-infections-and-co-stimulatory-gene-polymorphisms-in-kidney-transplant-outcomes
#10
Ahmad Niknam, Mohammad Hossein Karimi, Ramin Yaghobi, Bita Geramizadeh, Jamshid Roozbeh, Mehdi Salehipour, Mahdiyar Iravani
BACKGROUND: The surveillance of kidney transplant patients depends on function of different immunologic markers like co-stimulatory molecules. These molecules may also be associated with post kidney transplant viral related outcomes. OBJECTIVES: The aim of this study was to investigate the possible associations between co-stimulatory molecule gene polymorphisms and viral infections in kidney transplant patients. PATIENTS AND METHODS: In total, 172 kidney transplant patients were included in this study...
August 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27797900/viral-associated-gn-hepatitis-b-and-other-viral-infections
#11
Warren L Kupin
By definition, viral-associated GN indicates the direct pathogenic relationship between active viral replication and the development of acute GN. This definition is in sharp contrast to the semantic label and pathophysiologic foundation behind postinfectious GN that uniquely develops only during a period of resolved and absent active infection. The primary example of postinfectious GN are the glomerular lesions described after a pharyngeal or cutaneous streptococcal infection and do not represent the clinical or immunologic pattern seen with viral-associated GN...
October 18, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27789574/emerging-viral-stis-among-hiv-positive-men-who-have-sex-with-men-the-era-of-hepatitis-c-virus-and-human-papillomavirus
#12
REVIEW
Thijs Jw van de Laar, Olivier Richel
The number of infectious disease outbreaks and the number of unique pathogens responsible have significantly increased since the 1980s. HIV-positive men who have sex with men (MSM) are a vulnerable population with regards to the introduction, spread and clinical consequences of (newly introduced) STIs. After the introduction of combination antiretroviral treatment (cART), the incidence of sexually acquired hepatitis C virus (HCV) infection and human papillomavirus (HPV)-induced anal cancers have significantly increased among HIV-positive MSM...
October 27, 2016: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/27784963/tm6sf2-e167k-variant-predicts-severe-liver-fibrosis-for-human-immunodeficiency-hepatitis-c-virus-co-infected-patients-and-severe-steatosis-only-for-a-non-3-hepatitis-c-virus-genotype
#13
Caterina Sagnelli, Marco Merli, Caterina Uberti-Foppa, Hamid Hasson, Anna Grandone, Grazia Cirillo, Stefania Salpietro, Carmine Minichini, Mario Starace, Emanuela Messina, Patrizia Morelli, Emanuele Miraglia Del Giudice, Adriano Lazzarin, Nicola Coppola, Evangelista Sagnelli
AIM: To evaluate the impact of the Glu167Lys (E167K) transmembrane 6 superfamily member 2 (TM6SF2) variant on the biochemical and morphologic expression of liver lesions in human immunodeficiency virus (HIV)/hepatitis C virus (HCV) co-infected patients. METHODS: The study comprised 167 consecutive patients with HIV/HCV coinfection and biopsy-proven chronic hepatitis. A pathologist graded liver fibrosis and necroinflammation using the Ishak scoring system, and steatosis using Kleiner's scoring system...
October 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27774307/mapping-the-genomic-diversity-of-hcv-subtypes-1a-and-1b-implications-of-structural-and-immunological-constraints-for-vaccine-and-drug-development
#14
Lize Cuypers, Guangdi Li, Christoph Neumann-Haefelin, Supinya Piampongsant, Pieter Libin, Kristel Van Laethem, Anne-Mieke Vandamme, Kristof Theys
Despite significant progress in hepatitis C (HCV) treatment, global viral eradication remains a challenge. An in-depth map of its genome diversity within the context of structural and immunological constraints could contribute to the design of pan-genotypic antivirals and preventive vaccines. For such analyses, extensive information is only available for the highly prevalent HCV genotypes (GT) 1a and 1b. Using 647 GT1a and 408 GT1b full-genome sequences obtained from the Los Alamos database, we found that respectively 3 per cent and 82 per cent of all codon positions are under positive and negative selective pressure, suggesting variation mainly accumulates due to random genetic drift...
July 2016: Virus Evolution
https://www.readbyqxmd.com/read/27773912/study-on-evaluation-of-alanine-aminotransferase-alt-as-surrogate-marker-in-hepatitis-virus-test
#15
Daisuke Ikeda, Makiko Sugawa, Kazuo Kawahara
Nucleic acid amplification test (NAT), which was introduced by the Japanese Red Cross Society in October 1999, began to be performed for screening of blood transfusion formulations in Japan in August 2014. In this study, the precision of immunological screenings of hepatitis B (HBsAg, HBcAb, and HBsAb), hepatitis C (HCVAb), and human immunodeficiency (HIVAb) virus antigens in donated blood were evaluated. In addition, the sensitivity of the alanine aminotransferase (ALT) test for detection of the hepatitis B and C viruses was re-evaluated...
2016: Journal of Medical and Dental Sciences
https://www.readbyqxmd.com/read/27770558/expression-of-scavenger-receptor-ai-promotes-alternative-activation-of-murine-macrophages-to-limit-hepatic-inflammation-and-fibrosis
#16
Adam C Labonte, Sun-Sang J Sung, Lucas T Jennelle, Aditya P Dandekar, Young S Hahn
: The liver maintains an immunologically tolerant environment as a result of continuous exposure to food and bacterial constituents from the digestive tract. Hepatotropic pathogens can take advantage of this niche and establish lifelong chronic infections causing hepatic fibrosis and hepatocellular carcinoma. Macrophages (Mϕ) play a critical role in regulation of immune responses to hepatic infection and regeneration of tissue. However, the factors crucial for Mϕ in limiting hepatic inflammation or resolving liver damage have not been fully understood...
October 22, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27765123/-follow-up-study-on-efficacy-of-blocking-mother-to-infant-transmission-of-hbv-and-its-influence-factors-in-jiangsu-province-2010-2015
#17
J Jiang, S L Dai, J F Xu, Y Zou, L G Zhu, H Peng, F C Zhu, X J Zhai
Objective: To evaluate the effects of blocking transmission of HBV from mother to infant in Jiangsu, and discuss influencing factors related to development of chronic HBV infection in children of HBsAg positive mother. Methods: HBsAg positive mothers delivered during 2010-2015 in three counties of Jiangsu (Zhangjiagang, Danyang and Taixing) and their neonates were included in the study. The neonates were vaccinated with hepatitis B vaccine (10 μg) and hepatitis B immunoglobin (100 units) within 24 hours after birth...
October 10, 2016: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/27756788/results-from-an-integrated-safety-analysis-of-urelumab-an-agonist-anti-cd137-monoclonal-antibody
#18
Neil H Segal, Theodore F Logan, F Stephen Hodi, David F McDermott, Ignacio Melero, Omid Hamid, Henrik Schmidt, Caroline Robert, Vanna Chiarion-Sileni, Paolo A Ascierto, Michele Maio, Walter J Urba, Tara C Gangadhar, Satyendra Suryawanshi, Jaclyn Neely, Maria Jure-Kunkel, Suba Krishnan, Holbrook E Kohrt, Mario Sznol, Ronald Levy
PURPOSE: Urelumab is an agonist antibody to CD137 with potential application as an immuno-oncology therapeutic. Data were analyzed to assess safety, tolerability, and pharmacodynamic activity of urelumab, including the dose selected for ongoing development in patients with advanced solid tumors and lymphoma. PATIENTS AND METHODS: Three hundred and forty-six patients with advanced cancers who had progressed after standard treatment received at least one dose of urelumab in one of three dose-escalation, monotherapy studies...
October 18, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27738982/immunobiology-and-host-response-to-hev
#19
Yihua Zhou
Hepatitis E virus (HEV) causes acute self-limiting hepatitis in most cases and chronic infection in rare circumstances. It is believed to be noncytopathic, so immunologically mediated events should play important roles in its pathogenesis and infection outcomes. The anti-HEV antibody response was clarified when the major antigenic determinants on the ORF2 polypeptide were determined, which are located in its C-terminal portion. This subregion also forms the conformational neutralization epitopes. Robust anti-HEV immunoglobulin M (IgM) and IgG responses usually develop 3-4 weeks after infection in experimentally infected nonhuman primates...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27737830/non-specific-immunological-effects-of-selected-routine-childhood-immunisations-systematic-review
#20
Rama Kandasamy, Merryn Voysey, Fiona McQuaid, Karlijn de Nie, Rebecca Ryan, Olivia Orr, Ulrike Uhlig, Charles Sande, Daniel O'Connor, Andrew J Pollard
OBJECTIVE:  To identify and characterise non-specific immunological effects after routine childhood vaccines against BCG, measles, diphtheria, pertussis, and tetanus. DESIGN:  Systematic review of randomised controlled trials, cohort studies, and case-control studies. DATA SOURCES:  Embase, PubMed, Cochrane library, and Trip searched between 1947 and January 2014. Publications submitted by a panel of experts in the specialty were also included...
October 13, 2016: BMJ: British Medical Journal
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