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https://www.readbyqxmd.com/read/29673190/the-role-of-mirnas-in-virus-mediated-oncogenesis
#1
REVIEW
Zuzana Vojtechova, Ruth Tachezy
To date, viruses are reported to be responsible for more than 15% of all tumors worldwide. The oncogenesis could be influenced directly by the activity of viral oncoproteins or by the chronic infection or inflammation. The group of human oncoviruses includes Epstein–Barr virus (EBV), human papillomavirus (HPV), hepatitis B virus (HBV), hepatitis C virus (HCV), human herpesvirus 8 (HHV-8) or polyomaviruses, and transregulating retroviruses such as HIV or HTLV-1. Most of these viruses express short noncoding RNAs called miRNAs to regulate their own gene expression or to influence host gene expression and thus contribute to the carcinogenic processes...
April 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29668132/-shtlv-i-ii-seroprevalence-in-blood-donors-of-hospital-pablo-tob%C3%A3-n-uribe-blood-bank-during-the-period-2014-2015
#2
Manuela Muñoz, Santiago Carvalho, Jorge Hernando Donado, Gloria Eugenia Barco, Sergio Jaramillo
INTRODUCTION: The human-T cell lymphotropic virus is a retrovirus with various types known so far. HTLV-I and HTLV-II are of clinically importance as they cause different diseases such as adult T-cell leukemia/lymphoma, tropical spastic paraparesis, and human T-lymphotropic virus type I-associated myelopathy (HAM). OBJECTIVE: To estimate the prevalence of presumptive and confirmatory reactivity to HTLV-I/II in blood donors of Hospital Pablo Tobón Uribe Blood Bank between 2014 and 2015...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29665857/the-htlv-1-oncoprotein-tax-is-modified-by-the-ubiquitin-related-modifier-1-urm1
#3
Rita Hleihel, Behzad Khoshnood, Ingrid Dacklin, Hayssam Omran, Carine Mouawad, Zeina Dassouki, Marwan El-Sabban, Margret Shirinian, Caroline Grabbe, Ali Bazarbachi
BACKGROUND: Adult T-cell leukemia/lymphoma (ATL) is an aggressive malignancy secondary to chronic human T-cell lymphotropic virus 1 infection, triggered by the virally encoded oncoprotein Tax. The transforming activity and subcellular localization of Tax is strongly influenced by posttranslational modifications, among which ubiquitylation and SUMOylation have been identified as key regulators of the nuclear/cytoplasmic shuttling of Tax, as well as its ability to activate NF-κB signaling...
April 17, 2018: Retrovirology
https://www.readbyqxmd.com/read/29663494/phylogenetic-analysis-of-htlv-1-in-iranian-blood-donors-hiv-1-positive-patients-and-patients-with-beta-thalassemia
#4
Leila Pirayeshfard, Zohreh Sharifi, Sedigheh Amini-Kafiabad, Nasrin Haghnazari Sadaghiani
BACKGROUND: Human T-cell leukemia virus (HTLV) has been associated with various disease types. Since the discovery of the virus in 1980, seven subtypes of the virus have been identified. HTLV is widespread and endemic in some regions, such as Japan, Africa, South America, and northeast Iran. This study aimed to identify HTLV-1 genotype and also to analyze the nucleotide sequence of the LTR region in three groups, including blood donors, HIV-1+ patients, and β-thalassemia patients. MATERIALS AND METHODS: In this cross-sectional study, 2200 samples were collected from blood donors in Tehran (2000 samples), HIV-1+ patients (100 samples) and β-thalassemia patients (100 samples)...
April 16, 2018: Journal of Medical Virology
https://www.readbyqxmd.com/read/29661476/cutaneous-presentation-of-adult-t-cell-leukemia-lymphoma-atll-single-center-study-on-37-patients-in-metropolitan-france-between-1996-and-2016
#5
C Hurabielle, M Battistella, C Ram-Wolff, C Fite, V Meignin, J Rivet, M-D Vignon-Pennamen, T de Risi-Pugliese, E Raffoux, B Arnulf, E Oksenhendler, F Sicre de Fontbrune, R Peffault de Latour, G Socié, J-D Bouaziz, C Lebbé, A Bensussan, M Bagot
INTRODUCTION: Adult T-cell leukemia/lymphoma (ATLL) is a hematological malignancy associated with chronic HTLV-1 infection. AIM: To describe skin lesions in ATLL. METHODS: A descriptive, retrospective study between 1996 and 2016, including all patients diagnosed with ATLL at Saint-Louis Hospital (Paris, France). RESULTS: Thirty-seven ATLL patients were included. Fifteen patients (41%) had a cutaneous localization of the disease, which was present from the beginning of the disease for two thirds of them...
April 13, 2018: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29660338/different-molecular-mechanisms-of-htlv-1-and-hiv-ltr-activation-by-tpa
#6
Azhar Jabareen, Manal Salman, Aya Abu-Jaafar, Mahmoud Huleihel
HTLV-1 and HIV-1 are retroviruses involved in different human diseases. However, following infection, these viruses inter into a latent state. Tax and Tat are regarded as trans-activators of HTLV-1 and HIV-1 respectively. As it known, during the latent state the infected cells contain low Tax and Tat protein levels, so the activation of these viruses must be independent of these proteins. Here we focus on exploring the mechanism of activation of these viruses by 12-O-tetradecanoylphorbol-13-acetate (TPA), which is a potent activator of protein kinase C (PKC) and considered as a stress-inducing agent...
April 13, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29643841/mouse-models-that-enhanced-our-understanding-of-adult-t-cell-leukemia
#7
REVIEW
Sara Moodad, Abdou Akkouche, Rita Hleihel, Nadine Darwiche, Marwan El-Sabban, Ali Bazarbachi, Hiba El Hajj
Adult T cell Leukemia (ATL) is an aggressive lymphoproliferative malignancy secondary to infection by the human T-cell leukemia virus type I (HTLV-I) and is associated with a dismal prognosis. ATL leukemogenesis remains enigmatic. In the era of precision medicine in oncology, mouse models offer one of the most efficient in vivo tools for the understanding of the disease biology and developing novel targeted therapies. This review provides an up-to-date and comprehensive account of mouse models developed in the context of ATL and HTLV-I infection...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29625252/the-deep-lymphatic-anatomy-of-the-hand
#8
Chuan-Xiang Ma, Wei-Ren Pan, Zhi-An Liu, Fan-Qiang Zeng, Zhi-Qiang Qiu
BACKGROUND: the deep lymphatic anatomy of the hand still remains the least described in medical literature. METHODS: eight hands were harvested from four nonembalmed human cadavers amputated above the wrist. A small amount of 6% hydrogen peroxide was employed to detect the lymphatic vessels around the superficial and deep palmar vascular arches, in webs from the index to little fingers, the thenar and hypothenar areas. A 30-gauge needle was inserted into the vessels and injected with a barium sulphate compound...
April 3, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29625021/hepatitis-c-viral-load-in-hcv-monoinfected-and-hcv-hiv-1-hcv-htlv-1-2-and-hcv-hiv-htlv-1-2-co-infected-patients-from-s%C3%A3-o-paulo-brazil
#9
Fabiana Aparecida Alves, Karoline Rodrigues Campos, Marcílio Figueiredo Lemos, Regina Célia Moreira, Adele Caterino-de-Araujo
Co-infections of hepatitis C virus (HCV) and either human immunodeficiency virus type 1 (HIV-1), human T-cell lymphotropic virus type 1 (HTLV-1) or type 2 (HTLV-2) have been described as having an impact on HCV viremia and subsequent disease progression. HCV load in serum samples from 622 patients (343 males, 279 females; median age 50.8 years) from São Paulo/southeast Brazil was analyzed using the Abbott Real Time HCV assay (Abbott Molecular Inc., IL, USA). Samples were obtained from HCV-monoinfected (n=548), HCV/HIV-1- (n=41), HCV/HTLV-1- (n=16), HCV/HTLV-2- (n=8), HCV/HIV/HTLV-1- (n=4), and HCV/HIV/HTLV-2-co-infected (n=5) patients, and results were compared among the groups and according to sex...
April 3, 2018: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29624497/pseudotyping-of-hiv-1-with-human-t-lymphotropic-virus-1-htlv-1-envelope-glycoprotein-during-hiv-1-htlv-1-coinfection-facilitates-direct-hiv-1-infection-of-female-genital-epithelial-cells-implications-for-sexual-transmission-of-hiv-1
#10
Yuyang Tang, Alvin M George, Oksana Petrechko, Franklin J Nouvet, Stephanie D Sweet, Yuetsu Tanaka, Brian S Imbiakha, Guochun Jiang, Wei Gao, Kathryn Anastos, James E K Hildreth
Female genital epithelial cells cover the genital tract and provide the first line of protection against infection with sexually transmitted pathogenic viruses. These cells normally are impervious to HIV-1. We report that coinfection of cells by HIV-1 and another sexually transmitted virus, human T-lymphotropic virus 1 (HTLV-1), led to production of HIV-1 that had expanded cell tropism and was able to directly infect primary vaginal and cervical epithelial cells. HIV-1 infection of epithelial cells was blocked by neutralizing antibodies against the HTLV-1 envelope (Env) protein, indicating that the infection was mediated through HTLV-1 Env pseudotyping of HIV-1...
April 25, 2018: MSphere
https://www.readbyqxmd.com/read/29618693/-long-term-remission-with-mogamulizumab-monotherapy-in-a-patient-with-refractory-adult-t-cell-leukemia-lymphoma
#11
Yosuke Nakaya, Minako Tsutsumi, Hoyuri Fuseya, Mirei Horiuchi, Takuro Yoshimura, Yoshiki Hayashi, Hiroshi Kanashima, Takafumi Nakao, Takahisa Yamane
A 73-year-old female with malaise, anorexia, and hydrodipsia was referred to our department. Peripheral blood tests revealed leukocytosis with 51% blast cells exhibiting flower-shaped nuclei. Flow-cytometry to detect tumor cells in peripheral blood indicated CD3+, CD4+, CD8-, and CD25- expression, but those in the lymph nodes expressed CD25+. Southern blots revealed clonal HTLV-1 provirus in the tumor cells, consistent with adult T-cell leukemia-lymphoma. Cytotoxic chemotherapy was ineffective, but eight cycles of mogamulizumab induced complete remission (CR)...
2018: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29616088/retrospective-screening-of-microarray-data-to-identify-candidate-ifn-inducible-genes-in-a-htlv-1-transformed-model
#12
Alaa Refaat, Mohamed Owis, Sherif Abdelhamed, Ikuo Saiki, Hiroaki Sakurai
HuT-102 cells are considered one of the most representable human T-lymphotropic virus 1 (HTLV-1)-infected cell lines for studying adult T-cell lymphoma (ATL). In our previous studies, genome-wide screening was performed using the GeneChip system with Human Genome Array U133 Plus 2.0 for transforming growth factor-β-activated kinase 1 (TAK1)-, interferon regulatory factor 3 (IRF3)- and IRF4-regulated genes to demonstrate the effects of interferon-inducible genes in HuT-102 cells. Our previous findings demonstrated that TAK1 induced interferon inducible genes via an IRF3-dependent pathway and that IRF4 has a counteracting effect...
April 2018: Oncology Letters
https://www.readbyqxmd.com/read/29615995/htlv-1-alters-t-cells-for-viral-persistence-and-transmission
#13
REVIEW
Azusa Tanaka, Masao Matsuoka
Human T-cell leukemia virus type 1 (HTLV-1) was the first retrovirus to be discovered as a causative agent of adult T-cell leukemia-lymphoma (ATL) and chronic inflammatory diseases. Two viral factors, Tax and HTLV-1 bZIP factor (HBZ), are thought to be involved in the leukemogenesis of ATL. Tax expression is frequently lost due to DNA methylation in the promoter region, genetic changes to the tax gene, and deletion of the 5' long terminal repeat (LTR) in approximately half of all ATL cases. On the other hand, HBZ is expressed in all ATL cases...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29615991/htlv-1-regulating-the-balance-between-proviral-latency-and-reactivation
#14
REVIEW
Anurag Kulkarni, Charles R M Bangham
HTLV-1 plus-strand transcription begins with the production of doubly-spliced tax/rex transcripts, the levels of which are usually undetectable in freshly isolated peripheral blood mononuclear cells (PBMCs) from HTLV-1-infected individuals. However, the presence of a sustained chronically active cytotoxic T-cell response to HTLV-1 antigens in virtually all HTLV-1-infected individuals, regardless of their proviral load, argues against complete latency of the virus in vivo . There is an immediate burst of plus-strand transcription when blood from infected individuals is cultured ex vivo ...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29600938/detection-of-human-t-lymphotropic-virus-type-i-bzip-factor-and-tax-in-the-salivary-glands-of-sj%C3%A3-gren-s-syndrome-patients
#15
Hideki Nakamura, Hiroo Hasegawa, Daisuke Sasaki, Ayuko Takatani, Toshimasa Shimizu, Shota Kurushima, Yoshiro Horai, Yoshikazu Nakashima, Tatsufumi Nakamura, Junya Fukuoka, Atsushi Kawakami
OBJECTIVES: To detect HTLV-I bZIP factor (HBZ), tax and relevant molecules in labial salivary glands (LSGs) from patients with Sjögren's syndrome (SS). METHODS: The expressions of HBZ and tax in T cell lines and LSGs were analysed by in situ hybridization (ISH) or real time PCR. The expressions of forkhead box P3 (Foxp3) and p65 in immunohistochemistry were quantified. RESULTS: After specificity of ISH probes was determined in 5 T cell lines, in LSGs from an adult T-cell leukemia (ATL) patient and 3 HTLV-I-associated myelopathy (HAM)-SS patients, both HBZ and tax signals were detected in infiltrating mononuclear cells (MNCs) and ducts, and HBZ and tax were dominantly expressed in MNCs of ATL and HAM-SS, respectively...
March 20, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29594126/emerging-infectious-agents-and-blood-safety-in-latin-america
#16
José Eduardo Levi
Historically, emerging infectious agents have been an important driving force toward the enhancement of blood safety, illustrated by the sharp reduction in the transmission of infectious agents by blood transfusion after human immunodeficiency virus (HIV) epidemics. In general, Latin American (LATAM) countries have introduced screening for microorganisms with proven blood transmission with some delay in comparison to developed countries, but, nowadays, all LATAM countries comply with a minimum standard of screening which includes Hepatitis B, C, HIV, Treponema pallidum , and Trypanosoma cruzi ...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29593659/how-to-control-htlv-1-associated-diseases-preventing-de-novo-cellular-infection-using-antiviral-therapy
#17
Amandine Pasquier, Sandrine Alais, Loic Roux, Maria-Isabel Thoulouze, Karine Alvarez, Chloé Journo, Hélène Dutartre, Renaud Mahieux
Five to ten million individuals are infected by Human T-cell Leukemia Virus type 1 (HTLV-1). HTLV-1 is transmitted through prolonged breast-feeding, by sexual contacts and by transmission of infected T lymphocytes through blood transfusion. One to ten percent of infected carriers will develop a severe HTLV-1-associated disease: Adult-T-cell leukemia/lymphoma (ATLL), or a neurological disorder named Tropical Spastic Paraparesis/HTLV-1 Associated Myelopathy (TSP/HAM). In vivo , HTLV-1 is mostly detected in CD4+ T-cells, and to a lesser extent in CD8+ T cells and dendritic cells...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29589290/htlv-1-proviral-load-in-cerebrospinal-fluid-may-not-be-a-good-marker-to-differentiate-asymptomatic-carriers-with-high-proviral-load-in-blood-from-ham-tsp-patients
#18
Marina Lobato Martins, Anna Bárbara de Freitas Carneiro-Proietti, Rodrigo Nicolato, Débora Marques de Miranda, Luiz Cláudio Ferreira Romanelli
An elevated human T cell leukemia virus type 1 (HTLV-1) proviral load (PVL) is an important risk factor for HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), although there is a considerable frequency of asymptomatic carriers (AC) with high PVL in blood. Our objective was to evaluate whether PVL quantified in cerebrospinal fluid (CSF) is helpful to distinguish AC from HAM when AC have high PVL in blood (ACH ). ACH (n = 7) were characterized to have high PVL in blood by quantification of samples collected over time (mean 7 years)...
March 27, 2018: Journal of Neurovirology
https://www.readbyqxmd.com/read/29588208/application-of-htlv-1-tax-transgenic-mice-for-therapeutic-intervention
#19
REVIEW
Hideki Hasegawa, Kaori Sano, Akira Ainai, Tadaki Suzuki
Adult T-cell leukemia-lymphoma (ATL) is a refractory T-cell malignancy caused by infection of human T-cell leukemia virus type I (HTLV-I). Although the pathogenesis of ATL remains unclear, HTLV-1 oncoprotein Tax plays an important role in pathogenesis (Matsuoka, 2003; Jeang et al., 2004). Chemotherapy resistance of ATL leads the poor prognosis of this disease. In order to understand the pathogenesis and establish an animal model useful for therapy attempts, we have generated HTLV-1 Tax transgenic mice using the Lck proximal promoter to restrict the Tax expression in T-cells...
February 13, 2018: Advances in Biological Regulation
https://www.readbyqxmd.com/read/29581472/proteomic-analysis-of-plasma-extracellular-vesicles-reveals-mitochondrial-stress-upon-htlv-1-infection
#20
Patricia Jeannin, Thibault Chaze, Quentin Giai Gianetto, Mariette Matondo, Olivier Gout, Antoine Gessain, Philippe V Afonso
Extracellular vesicles (EVs) can participate in intercellular communication and pathogenesis. EVs contain many cargos, including proteins, and the composition of EVs differs between cell-types and activation levels. Thus, plasma EVs can be used as a biomarker of systemic response to infection and/or disease progression. In this study, we aimed at describing alterations in the protein content of plasma EVs upon infection with the human T-lymphotropic retrovirus type 1 (HTLV-1). HTLV-1 is the etiological agent of a lymphoproliferative disease (ATL) and a series of inflammatory diseases, including a neurodegenerative inflammatory disease (HAM/TSP)...
March 26, 2018: Scientific Reports
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