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Human herpesvirus 6

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https://www.readbyqxmd.com/read/28617304/human-herpesvirus-6-reactivation-in-dress-with-acute-liver-failure-a-missing-key-factor
#1
Vincent Descamps, Florence Brunet-Possenti
No abstract text is available yet for this article.
April 7, 2017: Transplantation
https://www.readbyqxmd.com/read/28601677/impact-of-stem-cell-graft-on-early-viral-infections-and-immune-reconstitution-after-allogeneic-transplantation-in-adults
#2
Marina Illiaquer, Berthe-Marie Imbert-Marcille, Thierry Guillaume, Lucie Planche, Marie Rimbert, Céline Bressollette-Bodin, Amandine Le Bourgeois, Pierre Peterlin, Alice Garnier, Claire Le Houerou, Philippe Moreau, Mohamad Mohty, Patrice Chevallier
BACKGROUND: Viral infections are well-known complications after allogeneic stem cell transplant (allo-SCT). OBJECTIVES: We compared prospectively incidences of DNAemia and active infections (AI) for five opportunistic viruses (Human Herpesvirus 6 (HHV-6), Epstein-Barr virus (EBV), BK polyomavirus (BKPyV), Cytomegalovirus (CMV) and Adenovirus (ADV)) and kinetics of immune reconstitution (IR) in adults receiving either double umbilical cord blood (dUCB group) or unrelated peripheral blood stem cell (uPBSC group) allo-SCT after a reduced-intensity conditioning (RIC) regimen...
May 31, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28598363/drug-reaction-with-eosinophilia-and-systemic-symptoms-dress-an-interplay-among-drugs-viruses-and-immune-system
#3
REVIEW
Yung-Tsu Cho, Che-Wen Yang, Chia-Yu Chu
Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a severe multiorgan hypersensitivity reaction mostly caused by a limited number of eliciting drugs in patients with a genetic predisposition. Patients with DRESS syndrome present with characteristic but variable clinical and pathological features. Reactivation of human herpesviruses (HHV), especially HHV-6, is the hallmark of the disease. Anti-viral immune responses intertwined with drug hypersensitivity make the disease more complicated and protracted...
June 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28596425/outcomes-of-hematopoietic-cell-transplantation-using-donors-or-recipients-with-inherited-chromosomally-integrated-hhv-6
#4
Joshua A Hill, Amalia S Magaret, Ruth Hall-Sedlak, Anna Mikhaylova, Meei-Li Huang, Brenda M Sandmaier, John A Hansen, Keith R Jerome, Danielle M Zerr, Michael Boeckh
Human herpesvirus 6 (HHV-6) species have a unique ability to integrate into chromosomal telomeres. Mendelian inheritance via gametocyte integration results in HHV-6 in every nucleated cell. The epidemiology and clinical impact of inherited chromosomally integrated (iciHHV-6) in hematopoietic cell transplant (HCT) recipients is unclear. We identified 4,319 HCT donor-recipient pairs (8,638 subjects) who received an allogeneic HCT and had archived pre-HCT peripheral blood mononuclear cell samples. We screened these samples for iciHHV-6 and compared characteristics of HCT recipients and donors with iciHHV-6 to recipients and donors without iciHHV-6, respectively...
June 8, 2017: Blood
https://www.readbyqxmd.com/read/28580733/case-report-of-a-primary-effusion-lymphoma-successfully-treated-with-oral-valganciclovir-after-failing-chemotherapy
#5
Juan Marquet, Kyra Velazquez-Kennedy, Sandra López, Amparo Benito, María-Jesús Blanchard, Jose Antonio Garcia-Vela
Primary effusion lymphoma is a rare non-Hodgkin lymphoma that presents with pleural effusions and lacking of tumour mass. It is universally associated with human herpesvirus 8 (HHV8) and is more frequent among immunosuppressed patients. There is no standard treatment, chemotherapy and anti-HIV therapy have been used with poor results, but there is still no strong evidence supporting the use of valganciclovir. We present the case of a HIV positive man that presented with pleural effusion compatible with primary effusion lymphoma and positivity for HHV8 DNA in blood...
June 4, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28570620/viral-etiologies-in-adult-patients-with-encephalitis-in-poland-a-prospective-single-center-study
#6
Marta Popiel, Karol Perlejewski, Agnieszka Bednarska, Tomasz Dzieciątkowski, Marcin Paciorek, Dariusz Lipowski, Monika Jabłonowska, Hanna Czeszko-Paprocka, Iwona Bukowska-Ośko, Kamila Caraballo Cortes, Agnieszka Pawełczyk, Maria Fic, Andrzej Horban, Marek Radkowski, Tomasz Laskus
Encephalitis is a severe neurological syndrome associated with high morbidity and mortality as well as long-term neurological sequelae. Despite being an important public health problem, very few extensive population-based studies were conducted so far in the world and none in Central Europe. Altogether 114 consecutive patients meeting the initial criteria for encephalitis were enrolled at the Warsaw Hospital for Infectious Diseases between June 2012 and July 2015. Eighteen patients were secondarily excluded from the analysis due to incomplete data or noinfectious cause...
2017: PloS One
https://www.readbyqxmd.com/read/28562350/u94-of-human-herpesvirus-6-down-modulates-src-promotes-a-partial-mesenchymal-to-epithelial-transition-and-inhibits-tumor-cell-growth-invasion-and-metastasis
#7
Francesca Caccuri, Roberto Ronca, Andrea S Laimbacher, Angiola Berenzi, Nathalie Steimberg, Federica Campilongo, Pietro Mazzuca, Arianna Giacomini, Giovanna Mazzoleni, Anna Benetti, Elisabetta Caselli, Marco Presta, Dario Di Luca, Cornel Fraefel, Arnaldo Caruso
U94, the latency gene of human herpesvirus 6, was found to inhibit migration, invasion and proliferation of vascular endothelial cells (ECs). Because of its potent anti-migratory activity on ECs, we tested the capability of U94 to interfere with the individual steps of the metastatic cascade. We examined the U94 biological activity on the human breast cancer cell line MDA-MB 231, as a model of highly aggressive cancer cell. Here we show that the expression of U94 delivered by an HSV-1-based amplicon promoted down-modulation of Src and downstream molecules linked to cell motility and proliferation...
May 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28543733/development-of-real-time-rt-pcr-assays-for-detection-of-three-classes-of-hhv-6a-gene-transcripts
#8
Masaru Ihira, Akiko Urashima, Hiroki Miura, Fumihiko Hattori, Yoshiki Kawamura, Ken Sugata, Tetsushi Yoshikawa
Human herpesvirus 6 (HHV-6), a member of the betaherpesvirus family, has two distinct species: HHV-6A and HHV-6B. HHV-6B real-time reverse transcription polymerase chain reaction (RT-PCR) has been used to distinguish between active and latent viral infection. In this study, we developed a real-time RT-PCR assay to detect HHV-6A-specific transcripts and evaluated its reliability for analysis of clinical samples. To develop HHV-6A-specific real-time RT-PCR assays, three different classes of gene transcripts (immediate early: U90; early: U12; and late: U100) were selected as targets...
May 23, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28542724/viruses-and-endogenous-retroviruses-in-multiple-sclerosis-from-correlation-to-causation
#9
REVIEW
A-F A Mentis, E Dardiotis, N Grigoriadis, E Petinaki, G M Hadjigeorgiou
Multiple sclerosis is an immune-mediated disease with an environmental component. According to a long-standing but unproven hypothesis dating to initial descriptions of multiple sclerosis (MS) at the end of the 19th century, viruses are either directly or indirectly implicated in MS pathogenesis. Whether viruses in MS are principally causal or simply contributory remains to be proven, but many viruses or viral elements-predominantly Epstein-Barr virus, human endogenous retroviruses (HERVs) and human herpesvirus 6 (HHV-6) but also less common viruses such as Saffold and measles viruses-are associated with MS...
May 23, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28531260/comparison-of-kaposi-sarcoma-risk-in-hiv-positive-adults-across-five-continents-a-multiregional-multicohort-study
#10
Julia Bohlius
Background: We compared Kaposi sarcoma (KS) risk in adults who initiated antiretroviral therapy (ART) across the Asia-Pacific, South Africa, Europe, Latin, and North America. Methods: We included cohort data of HIV-positive adults who initiated ART after 1995 within the framework of two large collaborations of observational HIV cohorts. We present incidence rates and adjusted hazard ratios (aHRs). Results: We included 208,140 patients from 57 countries...
May 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28501929/hyponatremia-associated-with-human-herpesvirus-6-hhv-6-encephalitis-after-allogeneic-hematopoietic-stem-cell-transplantation-a-presentation-different-from-hhv-6-myelitis
#11
Koichi Murakami, Sumiko Kohashi, Masatoshi Sakurai, Jun Kato, Takaaki Toyama, Yuya Koda, Yusuke Yamane, Risa Hashida, Ryohei Abe, Rie Yamazaki, Taku Kikuchi, Takayuki Shimizu, Shigeaki Suzuki, Naoki Hasegawa, Shinichiro Okamoto, Takehiko Mori
Human herpesvirus-6 (HHV-6) encephalitis and myelitis following allogeneic hematopoietic stem cell transplantation (HSCT) is frequently life-threatening. We retrospectively evaluated the clinical significance of hyponatremia in cases of HHV-6 encephalitis/myelitis. Using an institutional database and medical records, we identified and retrospectively analyzed 16 cases of HHV-6 encephalitis and/or myelitis after allogeneic HSCT. HHV-6 encephalitis and myelitis were defined as the symptoms/signs with HHV-6-DNA in the cerebrospinal fluid...
May 13, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28501028/multicentric-castleman-disease-of-hyaline-vascular-variant-presenting-with-unusual-systemic-manifestations-a-case-report
#12
B M D B Basnayake, A W M Wazil, T Kannangara, N V I Ratnatunga, S Hewamana, A M Ameer
BACKGROUND: Castleman disease is a rare lymphoproliferative disorder presenting with localized or disseminated lymphadenopathy and systemic manifestations. It can be categorized in numerous ways, such as unicentric versus multicentric, histopathological variants (hyaline-vascular, plasma cell, and mixed), or subtypes based on causative viral infections (human immunodeficiency virus, human herpesvirus-8, or Kaposi sarcoma herpesvirus). Presentation ranges from asymptomatic to symptoms involving multiple organs...
May 14, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28478829/the-use-of-heparin-in-infertility-and-recurrent-pregnancy-loss-are-its-antiviral-properties-at-play
#13
Eva Eliassen, Roberto Marci, Dario Di Luca, Roberta Rizzo
Recently, human herpesvirus 6 (HHV-6) has been implicated in cases of poor pregnancy outcomes. The ability of HHV-6 to disrupt endothelial cell functioning may inhibit the creation of an appropriate uterine environment for implantation and fetal development, resulting in infertility and pregnancy loss, among other complications. Heparin has been used to treat pregnant women who are predisposed to thrombosis, and it has also been used in some women with infertility or recurrent pregnancy loss without associated thrombotic events...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28476346/comparative-evaluation-of-a-laboratory-developed-real-time-pcr-assay-and-the-realstar-%C3%A2-hhv-6-pcr-kit-for-quantitative-detection-of-human-herpesvirus-6
#14
Cyril C Y Yip, Siddharth Sridhar, Andrew K W Cheng, Ami M Y Fung, Vincent C C Cheng, Kwok-Hung Chan, Kwok-Yung Yuen
BACKGROUND: HHV-6 reactivation in immunocompromised patients is common and may be associated with serious morbidity and mortality; therefore, early detection and initiation of therapy might be of benefit. Real-time PCR assays allow for early identification of HHV-6 reactivation to assist in providing a timely response. Thus, we compared the performance of an in-house developed HHV-6 quantitative PCR assay with a commercially available kit, the RealStar(®) HHV-6 PCR Kit. METHOD: The analytical sensitivity, analytical specificity, linearity, precision and accuracy of the in-house developed HHV-6 qPCR assay were evaluated...
May 2, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28472480/characterizing-the-cellular-immune-response-to-parainfluenza-virus-3
#15
Paibel I Aguayo-Hiraldo, Reuben J Arasaratnam, Ifigeneia Tzannou, Manik Kuvalekar, Premal Lulla, Swati Naik, Caridad A Martinez, Pedro A Piedra, Juan F Vera, Ann M Leen
Parainfluenza virus (PIV) 3 infections are a major cause of morbidity and mortality in immunocompromised individuals with no approved therapies. Our group has demonstrated the safety and efficacy of adoptively transferred virus-specific T cells for the prevention and treatment of a broad range of viral infections including BK virus, cytomegalovirus, adenovirus, human herpesvirus 6 and Epstein-Barr virus. However, this approach is restricted to well-characterized viruses with known immunogenic/protective T cell target antigens, precluding extension to PIV-3...
May 2, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28469695/molecular-diagnosis-of-central-nervous-system-opportunistic-infections-and-mortality-in-hiv-infected-adults-in-central-china
#16
Rongrong Yang, Hong Zhang, Yong Xiong, Xien Gui, Yongxi Zhang, Liping Deng, Shicheng Gao, Mingqi Luo, Wei Hou, Deyin Guo
BACKGROUND: CSF PCR is the standard diagnostic technique used in resource-rich settings to detect pathogens of the CNS infection. However, it is not currently used for routine CSF testing in China. Knowledge of CNS opportunistic infections among people living with HIV in China is limited. METHODS: Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral and fungal etiologies. Pathogen-specific primers were used to detect DNA from cytomegalovirus (CMV), herpes simplex virus (HSV), varicella-zoster virus (VZV), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6) and John Cunningham virus (JCV) via real-time polymerase chain reaction (PCR)...
2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28468887/stabilization-of-telomere-g-quadruplexes-interferes-with-human-herpesvirus-6a-chromosomal-integration
#17
Shella Gilbert-Girard, Annie Gravel, Sara Artusi, Sara N Richter, Nina Wallaschek, Benedikt B Kaufer, Louis Flamand
Human herpesvirus 6A and 6B (HHV-6A/B) can integrate their genomes into the telomeres of human chromosomes using a mechanism that remains poorly understood. To achieve a better understanding of the HHV-6 integration mechanism, we made use of BRACO-19, a compound that stabilizes G-quadruplex secondary structures and prevent telomere elongation by the telomerase complex. First, we analyzed the folding of telomeric sequences into G-quadruplex structures and their binding to BRACO-19 using G-quadruplex specific antibodies and surface plasmon resonance...
May 3, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28468878/cell-culture-systems-to-study-human-herpesvirus-6a-b-chromosomal-integration
#18
Annie Gravel, Isabelle Dubuc, Nina Wallaschek, Shella Gilbert-Girard, Vanessa Collin, Ruth Hall-Sedlak, Keith R Jerome, Yasuko Mori, Julie Carbonneau, Guy Boivin, Benedikt B Kaufer, Louis Flamand
Human herpesviruses 6A/B (HHV-6A/B) can integrate their viral genomes in the telomeres of human chromosomes. The viral and cellular factors contributing to HHV-6A/B integration remain largely unknown, mostly due to the lack of efficient and reproducible cell culture models to study HHV-6A/B integration. In this study, we characterized the HHV-6A/B integration efficiencies in several human cell lines using two different approaches. First, after a short-term infection (5h) cells were processed to single-cell cloning and analyzed for chromosomally-integrated HHV-6A/B (ciHHV-6A/B)...
May 3, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28464834/molecular-diagnosis-of-central-nervous-system-opportunistic-infections-and-mortality-in-hiv-infected-adults-in-central-china
#19
Rongrong Yang, Hong Zhang, Yong Xiong, Xien Gui, Yongxi Zhang, Liping Deng, Shicheng Gao, Mingqi Luo, Wei Hou, Deyin Guo
BACKGROUND: CSF PCR is the standard diagnostic technique used in resource-rich settings to detect pathogens of the CNS infection. However, it is not currently used for routine CSF testing in China. Knowledge of CNS opportunistic infections among people living with HIV in China is limited. METHODS: Intensive cerebrospiral fluid (CSF) testing was performed to evaluate for bacterial, viral and fungal etiologies. Pathogen-specific primers were used to detect DNA from cytomegalovirus (CMV), herpes simplex virus (HSV), varicella-zoster virus (VZV), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6) and John Cunningham virus (JCV) via real-time polymerase chain reaction (PCR)...
May 2, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28456604/herpesviruses-hijack-host-exosomes-for-viral-pathogenesis
#20
REVIEW
Sara Sadeghipour, Rommel A Mathias
Herpesviruses are remarkable pathogens possessing elaborate mechanisms to seize various host cellular components for immune evasion, replication, and virion egress. As viruses are dependent upon their hosts, investigating this intricate interplay has revealed that the exosome pathway is utilised by alpha (Herpes Simplex Virus 1), beta (Human Cytomegalovirus, and Human Herpesvirus 6) and gamma (Epstein-Barr Virus, and Kaposi Sarcoma-associated Herpesvirus) herpesviruses. Virions and exosomes share similar properties and functions...
April 26, 2017: Seminars in Cell & Developmental Biology
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