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Human herpesvirus 6

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https://www.readbyqxmd.com/read/28531260/comparison-of-kaposi-sarcoma-risk-in-hiv-positive-adults-across-five-continents-a-multiregional-multicohort-study
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28452096/kidney-transplant-after-hematopoietic-cell-transplant-in-pediatrics-infectious-and-immunosuppressive-considerations
#12
Christen L Ebens, Angela R Smith, Priya S Verghese
Pediatric patients requiring kidney transplant after hematopoietic cell transplant receive multiple courses of immunosuppression placing them at risk for infection. To elucidate potential risk factors for infection, we compared the immunosuppressive regimens and infectious complications of pediatric kidney transplant recipients at a single institution who had previously undergone hematopoietic cell transplant from different donors to similar patients reported in the literature. Among the initial four post-hematopoietic cell transplant kidney transplant patients reviewed, viremia episodes were universal, including BK virus, Epstein-Barr virus, and human herpesvirus-6, with one death from presumed BK virus encephalitis...
April 27, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28398495/a-histological-study-of-fulminant-type-1-diabetes-mellitus-related-to-human-cytomegalovirus-reactivation
#13
Sho Yoneda, Akihisa Imagawa, Kenji Fukui, Sae Uno, Junji Kozawa, Makoto Sakai, Toshiki Yumioka, Hiromi Iwahashi, Iichiro Shimomura
Context: Fulminant type 1 diabetes mellitus (T1DM) is thought to be partly caused by virus infection. Objective: This study investigated the mechanism of β cell destruction in fulminant T1DM after drug-induced hypersensitivity syndrome (DIHS). Methods: We determined the localization of viruses of human cytomegalovirus (HCMV), human herpesvirus 6 (HHV-6) and Epstein-Barr virus (EBV), and the expression of interferon regulatory factor 3 (IRF3) and viral receptors of Z DNA binding protein 1 (ZBP1) and retinoic acid-inducible gene I (RIG-I), together with inflammatory cells by immunohistochemistry of pancreas from an autopsy fulminant T1DM patient with DIHS or seven subjects with normal glucose tolerance who underwent pancreatectomy...
April 10, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28392330/viral-reactivations-and-associated-outcomes-in-context-of-immune-reconstitution-after-pediatric-hematopoietic-cell-transplantation
#14
Rick Admiraal, Coco de Koning, Caroline A Lindemans, Marc B Bierings, Annemarie M J Wensing, A Birgitta Versluys, Tom F W Wolfs, Stefan Nierkens, Jaap Jan Boelens
BACKGROUND: Viral reactivations (VR) following hematopoietic cell transplantation (HCT) contribute to significant morbidity and mortality. Timely immune reconstitution (IR) is suggested to prevent VR. OBJECTIVES: We studied the relation between IR (as a continuous over-time-predictor) and VR (as time-varying-predictor), and the relation between VR and other clinical outcomes. METHODS: In this retrospective analysis, all patients receiving a first HCT between January-2004 and September-2014 were included...
April 6, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28367948/human-herpesvirus-6-encephalitis-followed-by-acute-disseminated-encephalomyelitis-in-an-immunocompetent-adult
#15
Junichi Horie, Keisuke Suzuki, Toshiki Nakamura, Madoka Okamura, Akio Iwasaki, Koichi Hirata
A 26-year-old, otherwise healthy man presented with visual abnormality followed by loss of consciousness and convulsion. The patient then developed headache and fever 14 days later. Brain MRI showed hyperintensities in the left cingulate cortex. The cerrebrospinal fluid examinations showed mononuclear pleocytosis and positive PCR results for human herpesvirus 6 (HHV-6). A diagnosis of HHV-6 encephalitis and symptomatic epilepsy was made. The patient's clinical symptoms improved promptly following acyclovir treatment...
April 28, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28360414/chromosomal-integration-of-hhv-6a-during-non-productive-viral-infection
#16
Nitish Gulve, Celina Frank, Maximilian Klepsch, Bhupesh K Prusty
Human herpesvirus 6A (HHV-6A) and 6B (HHV-6B) are two different species of betaherpesviruses that integrate into sub-telomeric ends of human chromosomes, for which different prevalence rates of integration have been reported. It has been demonstrated that integrated viral genome is stable and is fully retained. However, study of chromosomally integrated viral genome in individuals carrying inherited HHV-6 (iciHHV-6) showed unexpected number of viral DR copies. Hence, we created an in vitro infection model and studied retention of full or partial viral genome over a period of time...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344765/new-insights-on-thyroid-hormone-mediated-regulation-of-herpesvirus-infections
#17
REVIEW
Robert W Figliozzi, Feng Chen, S Victor Hsia
Thyroid hormone (T3) has been suggested to participate in the regulation of herpesvirus replication during reactivation. Clinical observations and in vivo experiments suggest that T3 are involved in the suppression of herpes virus replication. In vitro, differentiated LNCaP cells, a human neuron-like cells, further resisted HSV-1 replication upon addition of T3. Previous studies indicate that T3 controlled the expression of several key viral genes via its nuclear receptors in differentiated LNCaP cells. Additional observation showed that differentiated LNCaP cells have active PI3K signaling and inhibitor LY294002 can reverse T3-mediated repression of viral replication...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28340807/prevalence-of-human-herpesvirus-8-and-bk-polyoma-virus-infections-in-end-stage-renal-disease-and-the-influence-of-renal-transplantation
#18
A Turkmen, O Guven, S Mese, A Agacfidan, B Yelken, M Onel, Y Caliskan, G Celik, S Turkoglu, B Kocak
Viral infections lead to significant morbidity and mortality in kidney transplant recipients. We evaluated 49 kidney transplant recipients for human herpesvirus 8 (HHV-8) and BK polyomavirus infections in conjunction with data obtained from 43 donors. The seroprevalence of HHV-8 was 6.9% in donors and 12.2% in recipients. HHV-8 DNA was detected below the limit of quantification (<5000 copies/mL) in a recipient with HHV-8 seropositivity at the pretransplant period and was undetectable at month 3 after transplantation...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28328962/the-blood-dna-virome-in-8-000-humans
#19
Ahmed Moustafa, Chao Xie, Ewen Kirkness, William Biggs, Emily Wong, Yaron Turpaz, Kenneth Bloom, Eric Delwart, Karen E Nelson, J Craig Venter, Amalio Telenti
The characterization of the blood virome is important for the safety of blood-derived transfusion products, and for the identification of emerging pathogens. We explored non-human sequence data from whole-genome sequencing of blood from 8,240 individuals, none of whom were ascertained for any infectious disease. Viral sequences were extracted from the pool of sequence reads that did not map to the human reference genome. Analyses sifted through close to 1 Petabyte of sequence data and performed 0.5 trillion similarity searches...
March 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28303641/myalgic-encephalomyelitis-chronic-fatigue-syndrome-and-gulf-war-illness-patients-exhibit-increased-humoral-responses-to-the-herpesviruses-encoded-dutpase-implications-in-disease-pathophysiology
#20
Peter Halpin, Marshall Vance Williams, Nancy G Klimas, Mary Ann Fletcher, Zachary Barnes, Maria Eugenia Ariza
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) and Gulf War Illness (GWI) are debilitating diseases with overlapping symptomology and there are currently no validated tests for definitive diagnosis of either syndrome. While there is evidence supporting the premise that some herpesviruses may act as possible triggers of ME/CFS, the involvement of herpesviruses in the pathophysiology of GWI has not been studied in spite of a higher prevalence of ME/CFS in these patients. We have previously demonstrated that the deoxyuridine triphosphate nucleotidohydrolases (dUTPase) encoded by Epstein-Barr virus (EBV), human herpesvirus-6 (HHV-6), and varicella-zoster virus (VZV) possess novel functions in innate and adaptive immunity...
March 17, 2017: Journal of Medical Virology
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