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https://www.readbyqxmd.com/read/28101146/bone-health-in-hiv-and-hepatitis-b-or-c-infections
#1
REVIEW
Emmanuel Biver, Alexandra Calmy, René Rizzoli
Chronic infections with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) add to age-dependent bone loss and may contribute to lower bone strength in the elderly. In this review, we report recent highlights on the epidemiology of bone fragility in chronic viral infections with HIV, HCV and HBV, its physiopathology and discuss the interference of antiviral therapies with bone metabolism. Chronic infections influence bone through the interactions between risk factors for bone fragility and falls (which are highly prevalent in infected patients), virus activity and antiviral drugs...
January 2017: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28100410/comp-serum-levels-a-new-non-invasive-biomarker-of-liver-fibrosis-in-patients-with-chronic-viral-hepatitis
#2
Kalliopi Zachou, Stella Gabeta, Zakera Shums, Nikolaos K Gatselis, George K Koukoulis, Gary L Norman, George N Dalekos
BACKGROUND & AIMS: Recently we have shown that cartilage oligomeric matrix protein (COMP), a fibrillar collagen assembly regulator, is strongly associated with cirrhosis and hepatocellular carcinoma progression. Therefore, we assessed whether serum COMP levels can be used as a non-invasive fibrosis marker in patients with chronic viral hepatitis (CVH) and compared this marker with standard methods for disease stage assessment [histology, transient elastography (TE), APRI, FIB-4]. METHODS: Sera from 116 CVH patients, 66 HBV [24 female; median age 53(22-76)] and 50 HCV [21 female; median age 48...
January 15, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28099338/liver-steatosis-in-children-with-chronic-hepatitis-b-and-c-prevalence-predictors-and-impact-on-disease-progression
#3
Maria Pokorska-Śpiewak, Barbara Kowalik-Mikołajewska, Małgorzata Aniszewska, Magdalena Pluta, Bożena Walewska-Zielecka, Magdalena Marczyńska
Only scarce data on liver steatosis in children with chronic hepatitis B and C (CHB and CHC) are available. The objective of this study was to evaluate the prevalence, predictors, and impact of hepatic steatosis on children with CHB and CHC. A total of 78 patients aged 11.5 ± 3.4 years were included: 30 (38%) had CHB, and 48 (62%) had CHC. Steatosis was scored on a 5-point scale, as follows: absent; minimal (≤5% hepatocytes affected), mild (6-33%), moderate (34-66%), and severe (>66%). Stepwise logistic regression was used to determine the factors associated with steatosis and moderate-to-severe steatosis...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28099077/disease-complexity-in-a-declining-alaskan-muskox-ovibos-moschatus-population
#4
Josephine A Afema, Kimberlee B Beckmen, Stephen M Arthur, Kathy Burek Huntington, Jonna A K Mazet
The muskox ( Ovibos moschatus ) population inhabiting the eastern North Slope (ENS) of Alaska declined dramatically during 1999-2006, whereas populations in western Alaska (WA) were stable or increasing. To understand morbidity and mortality factors contributing to the decline, Alaska Department of Fish and Game conducted pathologic investigations of carcasses from 2005 until 2008. Additionally, archived sera from both ENS and WA muskoxen collected during 1984-1992, before the documented beginning of the ENS decline; sera collected during 2000, near the beginning of the decline; and contemporary sera (from live capture-release, adult females) collected during 2006, 2007, and 2008 were analyzed to determine whether prevalence of antibody to potential pathogens differed in the two areas or changed over time...
January 18, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28098253/the-clinically-approved-antiviral-drug-sofosbuvir-inhibits-zika-virus-replication
#5
Carolina Q Sacramento, Gabrielle R de Melo, Caroline S de Freitas, Natasha Rocha, Lucas Villas Bôas Hoelz, Milene Miranda, Natalia Fintelman-Rodrigues, Andressa Marttorelli, André C Ferreira, Giselle Barbosa-Lima, Juliana L Abrantes, Yasmine Rangel Vieira, Mônica M Bastos, Eduardo de Mello Volotão, Estevão Portela Nunes, Diogo A Tschoeke, Luciana Leomil, Erick Correia Loiola, Pablo Trindade, Stevens K Rehen, Fernando A Bozza, Patrícia T Bozza, Nubia Boechat, Fabiano L Thompson, Ana M B de Filippis, Karin Brüning, Thiago Moreno L Souza
Zika virus (ZIKV) is a member of the Flaviviridae family, along with other agents of clinical significance such as dengue (DENV) and hepatitis C (HCV) viruses. Since ZIKV causes neurological disorders during fetal development and in adulthood, antiviral drugs are necessary. Sofosbuvir is clinically approved for use against HCV and targets the protein that is most conserved among the members of the Flaviviridae family, the viral RNA polymerase. Indeed, we found that sofosbuvir inhibits ZIKV RNA polymerase, targeting conserved amino acid residues...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097104/massive-hemolysis-causing-renal-failure-in-acute-hepatitis-e-infection
#6
Pragya Karki, Sarthak Malik, Bipadabhanjan Mallick, Vishal Sharma, Surinder S Rana
Acute viral hepatitis is usually a self-limiting illness. However, it can lead to complications that can be life-threatening, such as acute liver failure. Glucose 6 phosphate dehydrogenase (G6PD) deficiency in the setting of acute viral hepatitis can lead to a massive hemolysis, manifesting as acute kidney injury and markedly raised bilirubin levels; although cases are rare. Here, we report such a case. The patient had a viral hepatitis E infection and presented with kidney injury requiring dialysis. Examination showed very high mixed hyperbilirubinemia due to massive intravascular hemolysis...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28097103/efficacy-and-safety-of-daclatasvir-in-hepatitis-c-an-overview
#7
REVIEW
Nesrine Gamal, Stefano Gitto, Pietro Andreone
Hepatitis C virus (HCV) infection is a growing public health concern, with 184 million people infected worldwide. During the past decade, interferon has been the backbone of HCV treatment, even though it remains far from ideal. The latest development of the new direct antivirals has drastically changed the treatment approach for chronic hepatitis C (CHC). Inhibitors of the HCV NS5A region have garnered remarkable interest among treating physicians, due to their high potency and favourable safety profile. In particular, treatment with daclatasvir (DCV) has yielded high rates of vriologic response in patients infected with genotype (Gt) 1 and Gt 3, when used in combination with other antivirals of a different class, such as sofosbuvir...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28097102/mechanisms-of-accelerated-liver-fibrosis-progression-during-hiv-infection
#8
REVIEW
Jose D Debes, Paul R Bohjanen, Andre Boonstra
With the introduction of antiretroviral therapy (ART), a dramatic reduction in HIV-related morbidity and mortality has been observed. However, it is now becoming increasingly clear that liver-related complications, particularly rapid fibrosis development from ART as well as from the chronic HIV infection itself, are of serious concern to HIV patients. The pathophysiology of liver fibrosis in patients with HIV is a multifactorial process whereby persistent viral replication, and bacterial translocation lead to chronic immune activation and inflammation, which ART is unable to fully suppress, promoting production of fibrinogenic mediators and fibrosis...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28097101/novel-treatment-of-hepatitis-c-virus-infection-for-patients-with-renal-impairment
#9
REVIEW
Goki Suda, Koji Ogawa, Megumi Kimura, Masato Nakai, Takuya Sho, Kenichi Morikawa, Naoya Sakamoto
Prevalence of hepatitis C virus (HCV) infection is high in patients with end-stage renal dysfunction, including patients undergoing hemodialysis (HD). The HCV infection itself can cause glomerulonephritis and puts individuals at increased risk of developing end-stage renal disease; fortunately, successful HCV eradication sometimes restore HCV-related renal dysfunction. Moreover, the prognosis of dialysis patients infected with HCV is significantly worse and the renal allograft survival in HCV-infected patients is also worse than in dialysis patients without HCV infection...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28097097/mir-29a-promotes-lipid-droplet-and-triglyceride-formation-in-hcv-infection-by-inducing-expression-of-srebp-1c-and-cav1
#10
Mennatallah Mamdouh Mahdy, Nada Magdy El-Ekiaby, Rana Mahmoud Hashish, Radwa Ayman Salah, Rasha Sayed Hanafi, Hassan Mohamed El-Said Azzazy, Ahmed Ihab Abdelaziz
Aims: To examine the regulation of SREBP-1c and CAV1 by microRNA-29a (miR-29a) in cells infected with hepatitis C virus (HCV) in an attempt to control HCV-induced non-alcoholic fatty liver disease. Methods: In order to examine the manipulation of SREBP-1c and CAV1 by miR-29a, oleic acid (OA)-treated JFH-I-infected Huh-7 cells were used. OA was added 24 h post-transfection and gene expression was investigated by qRT-PCR at 48 h post treatment. The functional impact of the observed alteration in SREBP-1c and CAV1 expression was analyzed by examining lipid droplet (LD) and triglyceride (TG) content at 72 h post-OA treatment using light microscopy and spectrophotometry, respectively...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28096847/transfusion-transmitted-malaria-in-iran-a-narrative-review-article
#11
REVIEW
Ahmad Mardani, Hossein Keshavarz, Ali Akbar Pourfathollah, Mahtab Maghsudlu
BACKGROUND: Malaria is the most important transfusion-transmitted infection (TTI) in worldwide after viral hepatitis and human immunodeficiency virus (HIV) infection. The main objective of the present study was to review and evaluate the transmission of malaria via blood transfusion in Iran. METHODS: A literature search was done without time limitation in the electronic databases as follows: PubMed, Scopus, Google Scholar, Web of Science, Science Direct, scientific information database (SID), Magiran, IranMedex and Irandoc...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28096411/hepatitis-e-virus-orf3-is-a-functional-ion-channel-required-for-release-of-infectious-particles
#12
Qiang Ding, Brigitte Heller, Juan M V Capuccino, Bokai Song, Ila Nimgaonkar, Gabriela Hrebikova, Jorge E Contreras, Alexander Ploss
Hepatitis E virus (HEV) is the leading cause of enterically transmitted viral hepatitis globally. Of HEV's three ORFs, the function of ORF3 has remained elusive. Here, we demonstrate that via homophilic interactions ORF3 forms multimeric complexes associated with intracellular endoplasmic reticulum (ER)-derived membranes. HEV ORF3 shares several structural features with class I viroporins, and the function of HEV ORF3 can be maintained by replacing it with the well-characterized viroporin influenza A virus (IAV) matrix-2 protein...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096363/an-rna-based-signature-enables-high-specificity-detection-of-circulating-tumor-cells-in-hepatocellular-carcinoma
#13
Mark Kalinich, Irun Bhan, Tanya T Kwan, David T Miyamoto, Sarah Javaid, Joseph A LiCausi, John D Milner, Xin Hong, Lipika Goyal, Srinjoy Sil, Melissa Choz, Uyen Ho, Ravi Kapur, Alona Muzikansky, Huidan Zhang, David A Weitz, Lecia V Sequist, David P Ryan, Raymond T Chung, Andrew X Zhu, Kurt J Isselbacher, David T Ting, Mehmet Toner, Shyamala Maheswaran, Daniel A Haber
Circulating tumor cells (CTCs) are shed into the bloodstream by invasive cancers, but the difficulty inherent in identifying these rare cells by microscopy has precluded their routine use in monitoring or screening for cancer. We recently described a high-throughput microfluidic CTC-iChip, which efficiently depletes hematopoietic cells from blood specimens and enriches for CTCs with well-preserved RNA. Application of RNA-based digital PCR to detect CTC-derived signatures may thus enable highly accurate tissue lineage-based cancer detection in blood specimens...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095508/the-smc5-6-complex-restricts-hbv-when-localized-to-nd10-without-inducing-an-innate-immune-response-and-is-counteracted-by-the-hbv-x-protein-shortly-after-infection
#14
Congrong Niu, Christine M Livingston, Li Li, Rudolf K Beran, Stephane Daffis, Dhivya Ramakrishnan, Dara Burdette, Leanne Peiser, Eduardo Salas, Hilario Ramos, Mei Yu, Guofeng Cheng, Michel Strubin, William E Delaney Iv, Simon P Fletcher
The structural maintenance of chromosome 5/6 complex (Smc5/6) is a restriction factor that represses hepatitis B virus (HBV) transcription. HBV counters this restriction by expressing HBV X protein (HBx), which targets Smc5/6 for degradation. However, the mechanism by which Smc5/6 suppresses HBV transcription and how HBx is initially expressed is not known. In this study we characterized viral kinetics and the host response during HBV infection of primary human hepatocytes (PHH) to address these unresolved questions...
2017: PloS One
https://www.readbyqxmd.com/read/28093994/viral-infection-and-obesity-current-status-and-future-prospective
#15
Sayed Sartaj Sohrab, Mohammad Amjad Kamal, Richard L Atkinson, Maha M Alawi, Esam I Azhar
The association of pathogenic viruses with obesity has now been well-known in both human and animals. Globally, human obesity has become a serious problem leading to the emergence of multiple life-threatening diseases. Adenoviruses contribute a significant role in the induction of obesity by affecting various pathways. Due to impaired immunity, obese individuals are more prone to nosocomial infections leading to complications of obesity. In contrast, several other important factors contributing to human obesity are known...
January 16, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28093538/prevalence-and-determinants-of-cryptosporidium-infection-in-an-underdeveloped-rural-region-of-southwestern-china
#16
Ya Yang, Yibiao Zhou, Wanting Cheng, Xiang Pan, Penglei Xiao, Yan Shi, Jianchuan Gao, Xiuxia Song, Yue Chen, Qingwu Jiang
Few studies have focused on the epidemiology of Cryptosporidium in resource-challenged settings in China. We report a community-based cross-sectional study to investigate the prevalence of Cryptosporidium infection and its risk factors and associations with hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) infections. The prevalence of Cryptosporidium infection was 12.6% (95% confidence interval = 11.0-14.3). Individuals living in households with ≥ 5 family members and raising domestic pigs tended to have a greater risk of Cryptosporidium infection...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093535/hepatitis-e-in-singapore-a-case-series-and-viral-phylodynamics-study
#17
Esmeralda Chi-Yuan Teo, Boon-Huan Tan, Michael A Purdy, Pui-San Wong, Pei-Jun Ting, Pik-Eu Jason Chang, Lynette Lin-Ean Oon, Amanda Sue, Chong-Gee Teo, Chee-Kiat Tan
The incidence of hepatitis E in Singapore appears to be increasing. A retrospective case-series study of patients diagnosed with hepatitis E in a tertiary hospital from 2009 to 2013 was conducted. Of 16 cases, eight (50%) were solid-organ transplant recipients (SOTRs), and 14 (88%) were found infected by genotype 3 hepatitis E virus (HEV-3). Bayesian inferences based on HEV subgenomic sequences from seven cases suggest that HEV-3 strains were introduced to Singapore as two principal lineages. Within limitations of the study, it can be inferred that one lineage, in the 3efg clade, emerged about 83 years ago, probably originating from Japan, whereas the other, in the 3abchij clade, emerged about 40 years ago, from the United States...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093337/nk-cell-phenotypic-and-functional-shifts-coincide-with-specific-clinical-phases-in-the-natural-history-of-chronic-hbv-infection
#18
Rik A de Groen, Jun Hou, Gertine W van Oord, Zwier M A Groothuismink, Marieke van der Heide, Robert J de Knegt, André Boonstra
BACKGROUND: Chronic HBV infection can be divided into 4 distinct clinical phases: immune tolerant, immune active, inactive carrier, and HBeAg-negative hepatitis. Using a systems biology approach, we recently identified innate immune response components, specifically NK cells as a distinctive factor of specific HBV clinical phases. To expand on this study and identify the underlying immunological mechanisms, we performed a comprehensive profiling of NK cells in chronic HBV infection. METHODS: Peripheral blood from untreated chronic HBV patients was used to analyze phenotypic markers, as well as cytokine production and cytoxicity of NK cells...
January 13, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28092420/immune-modulation-by-the-hepatitis-c-virus-core-protein
#19
Cecilia Fernández-Ponce, Juan Pedro Muñoz-Miranda, Mikel M Arbulo-Echevarria, Rocío Litrán, Enrique Aguado, Francisco García-Cozar
Hepatitis C virus (HCV) infection is currently the most important cause of chronic viral hepatitis in the world and one of the most frequent indications for liver transplantation. HCV uses different strategies to evade the innate and adaptive immune response, and this evasion plays a key role in determining viral persistence. Several HCV viral proteins have been described as immune modulators. In this review, we will focus on the effect of HCV nucleocapsid core protein in the function of immune cells and its correlation with the findings observed in HCV chronically infected patients...
January 16, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28092412/population-dynamics-of-hcv-subtypes-in-injecting-drug-users-on-methadone-maintenance-treatment-in-china-associated-with-economic-and-health-reform
#20
Sheng Zhou, Eleonora Cella, Wang Zhou, Wen-Hua Kong, Man-Qing Liu, Pu-Lin Liu, Massimo Ciccozzi, Marco Salemi, Xin-Guang Chen
The extensive genetic heterogeneity of hepatitis C virus (HCV) requires in-depth understanding of the population dynamics of different viral subtypes for more effective control of epidemic outbreaks. We analyzed HCV sequences data from 125 participants in Wuhan, China. These participants were newly infected by subtype 1b (n=13), 3a (n=15), 3b (n=50), and 6a (n=39) while on methadone maintenance treatment (MMT). Bayesian phylogenies and demographic histories were inferred for these subtypes. Participants infected with HCV-1b and 3a were clustered in well-supported monophyletic clades, indicating local sub-epidemics...
January 16, 2017: Journal of Viral Hepatitis
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