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https://www.readbyqxmd.com/read/29593659/how-to-control-htlv-1-associated-diseases-preventing-de-novo-cellular-infection-using-antiviral-therapy
#1
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
#2
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/29581472/proteomic-analysis-of-plasma-extracellular-vesicles-reveals-mitochondrial-stress-upon-htlv-1-infection
#3
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
https://www.readbyqxmd.com/read/29558516/low-genetic-diversity-of-the-human-t-cell-lymphotropic-virus-htlv-1-in-an-endemic-area-of-the-brazilian-amazon-basin
#4
Akim Felipe Santos Nobre, Danilo de Souza Almeida, Louise Canto Ferreira, Deimy Lima Ferreira, Edivaldo Costa Sousa Júnior, Maria de Nazaré do Socorro de Almeida Viana, Ingrid Christiane Silva, Bruna Teles Pinheiro, Stephen Francis Ferrari, Alexandre da Costa Linhares, Edna Aoba Ishikawa, Rita Catarina Medeiros Sousa, Maísa Silva de Sousa
The Human T-cell Lymphotropic Virus (HTLV-1) is a Deltaretrovírus that was first isolated in the 1970s, and associated with Adult T-cell Leucemia-Lymphoma (ATLL), and subsequently to Tropical Spastic Paraparesis-Myelopathy (TSP/HAM). The genetic diversity of the virus varies among geographic regions, although its mutation rate is very low (approximately 1% per thousand years) in comparison with other viruses. The present study determined the genetic diversity of HTLV-1 in the metropolitan region of Belém, in northern Brazil...
2018: PloS One
https://www.readbyqxmd.com/read/29554087/temporal-trends-in-human-t-lymphotropic-virus-1-htlv-1-associated-myelopathy-tropical-spastic-paraparesis-ham-tsp-incidence-in-martinique-over-25-years-1986-2010
#5
Stephane Olindo, Severine Jeannin, Martine Saint-Vil, Aissatou Signate, Mireille Edimonana-Kaptue, Julien Joux, Harold Merle, Pascale Richard, Samuel Granjeaud, Philippe Cabre, Didier Smadja, Raymond Cesaire, Agnes Lezin
BACKGROUND: Human T-lymphotropic virus type 1 (HTLV-1) has been discovered in 1980 and has been linked to tropical spastic paraparesis (HAM/TSP) in 1985 in Martinique. There is no data on HAM/TSP incidence trends. We report, in the present work, the temporal trends incidence of HAM/TSP in Martinique over 25 years. METHODS: Martinique is a Caribbean French West Indies island deserved by a unique Neurology Department involved in HAM/TSP diagnosis and management. A registry has been set up since 1986 and patients diagnosed for a HAM/TSP were prospectively registered...
March 19, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29515558/htlv-deregulation-of-the-nf-%C3%AE%C2%BAb-pathway-an-update-on-tax-and-antisense-proteins-role
#6
REVIEW
Stefania Fochi, Simona Mutascio, Umberto Bertazzoni, Donato Zipeto, Maria G Romanelli
Human T-cell lymphotropic virus type 1 (HTLV-1) is the causative agent of adult T-cell leukemia (ATL), an aggressive CD4+ /CD25+ T-cell malignancy and of a severe neurodegenerative disease, HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP). The chronic activation or deregulation of the canonical and non-canonical nuclear factor kappa B (NF-κB) pathways play a crucial role in tumorigenesis. The HTLV-1 Tax-1 oncoprotein is a potent activator of the NF-κB transcription factors and the NF-κB response is required for promoting the development of HTLV-1 transformed cell lines...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29499169/in-vitro-basal-t-cell-proliferation-among-asymptomatic-htlv-1-patients-co-infected-with-hepatitis-c-and-or-hiv-1
#7
Tatiane Assone, Tatiana M Kanashiro, Maira P M Baldassin, Arthur Paiva, Michel Haziot, Jerusa Smid, Augusto Penalva de Oliveira, Luiz Augusto M Fonseca, Philip J Norris, Jorge Casseb
BACKGROUND: Infection with HTLV-1 can be associated with myelopathy/tropical spastic paraparesis (HAM/TSP) and other inflammatory diseases. Lymphocytes from about half of HTLV-1-infected subjects spontaneously proliferate in vitro, and how this phenomenon relates to symptomatic disease and viral burden is poorly understood. OBJECTIVE: To evaluate T-cell proliferation in vitro among patients co-infected with HTLV-1/HCV/HIV-1. MATERIAL AND METHODS: From 610 HTLV-infected patients of the HTLV outpatient clinic from Institute of Infectious Diseases "Emilio Ribas" in São Paulo, 273 agreed to participate: 72 had HAM/TSP (excluded from this analysis) and 201 were asymptomatic, a classification performed during a regular neurological appointment...
February 27, 2018: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29473309/efficacy-of-mirabegron-for-overactive-bladder-with-human-t-cell-lymphotropic-virus-1-associated-myelopathy
#8
Tomohiro Matsuo, Yasuyoshi Miyata, Tatsufumi Nakamura, Katsuya Satoh, Hideki Sakai
OBJECTIVE: Mirabegron is widely considered as an effective and safe drug for patients with overactive bladder (OAB). However, there is no evidence regarding the efficacy of mirabegron in human T cell lymphotropic virus-1 (HTLV-1)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) patients with OAB symptoms. The aim of the present study was to clarify the efficacy of mirabegron in HAM/TSP patients with OAB symptoms. METHODS: The present study evaluated the efficacy of mirabegron treatment (50 mg, once daily) in nineteen HAM/TSP patients with OAB symptoms by assessing subjective symptoms using the overactive bladder symptom score (OABSS) and International Prostate Symptom Score (IPSS) before and 12 weeks after administration...
February 22, 2018: Lower Urinary Tract Symptoms
https://www.readbyqxmd.com/read/29462596/onabotulinumtoxin-type-a-improves-lower-urinary-tract-symptoms-and-quality-of-life-in-patients-with-human-t-cell-lymphotropic-virus-type-1-associated-overactive-bladder
#9
Jose Abraão Carneiro Neto, Silvane Braga Santos, Gloria Orge Orge, Davi Tanajura, Lucia Passos, Cassius José Oliveira, Rosana Andrade, Cláudio Galeno de Melo, Ubirajara Barroso, Edgar M Carvalho
AIM: To evaluate the efficacy of the onabotulinum toxin type A in the treatment of HTLV-1 associated overactive bladder and its impact on QoL. METHODS: Case series with 10 patients with overactive bladder refractory to conservative treatment with anticholinergic or physical therapy. They received 200Ui of onabotulinumtoxin type A intravesically and were evaluated by overactive bladder symptoms score (OABSS) and King's Health Questionnaire. RESULTS: The mean (SD) of the age was 52+14...
February 17, 2018: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29414279/mogamulizumab-anti-ccr4-in-htlv-1-associated-myelopathy
#10
Tomoo Sato, Ariella L G Coler-Reilly, Naoko Yagishita, Natsumi Araya, Eisuke Inoue, Rie Furuta, Toshiki Watanabe, Kaoru Uchimaru, Masao Matsuoka, Naoki Matsumoto, Yasuhiro Hasegawa, Yoshihisa Yamano
BACKGROUND: Human T-lymphotropic virus type 1 (HTLV-1) causes the debilitating neuroinflammatory disease HTLV-1-associated myelopathy-tropical spastic paraparesis (HAM-TSP) as well as adult T-cell leukemia-lymphoma (ATLL). In patients with HAM-TSP, HTLV-1 infects mainly CCR4+ T cells and induces functional changes, ultimately causing chronic spinal cord inflammation. We evaluated mogamulizumab, a humanized anti-CCR4 monoclonal antibody that targets infected cells, in patients with HAM-TSP...
February 8, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29408825/ligand-activated-peroxisome-proliferator-activated-receptor-%C3%AE-attenuates-vascular-oxidative-stress-by-inhibiting-thrombospondin-1-expression
#11
Min Young Ahn, Sun Ah Ham, Taesik Yoo, Won Jin Lee, Jung Seok Hwang, Kyung Shin Paek, Dae-Seog Lim, Sung Gu Han, Chi-Ho Lee, Han Geuk Seo
Thrombospondin-1 (TSP-1) is implicated in vascular diseases associated with oxidative stress, such as abdominal aortic aneurysms, ischemia-reperfusion injury, and atherosclerosis. However, the regulatory mechanisms underlying TSP-1 expression are not fully elucidated. In this study, we found that peroxisome proliferator-activated receptor δ (PPARδ) inhibited oxidative stress-induced TSP-1 expression and migration in vascular smooth muscle cells (VSMCs). Activation of PPARδ by GW501516, a specific ligand for PPARδ, significantly attenuated hydrogen peroxide (H2O2)-induced expression of TSP-1 in VSMCs...
February 6, 2018: Journal of Vascular Research
https://www.readbyqxmd.com/read/29400072/role-of-integrin-signaling-activation-on-the-development-of-human-t-cell-leukemia-virus-1-htlv-1-associated-myelopathy-tropical-spastic-paraparesis-its-relationship-to-htlv-1-infected-cd4-t-cell-transmigrating-activity-into-the-tissues
#12
Tatsufumi Nakamura, Katsuya Satoh, Hideki Nakamura, Naomi Fukushima, Yoshihiro Nishiura, Takafumi Furuya, Katsuhiro Ichinose
The main clinical feature of human T-cell leukemia virus-1 (HTLV-1)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) is slowly progressive spastic paraparesis with bladder dysfunction. HAM/TSP is induced by chronic inflammation in the spinal cord, mainly the lower thoracic cord. A long-standing bystander mechanism, such as the destruction of surrounding tissues by the interaction between infiltrated Th1-like, HTLV-1-infected CD4+ T cells and HTLV-1-specific CD8+ cytotoxic T cells (CTL), is probably critical for the induction of chronic inflammation...
February 5, 2018: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29318453/sensory-neuronopathy-heralding-human-t-cell-lymphotropic-virus-type-i-myelopathy
#13
Alberto R M Martinez, Raphael F Casseb, Carlos R Martins, Anamarli Nucci, Marcondes C França
Neurological phenotypes of human T cell lymphotropic virus type I (HTLV-1) are numerous and rarely may not manifest the classic HTLV-associated myelopathy/tropical spastic paraparesis (HAM/TSP). We report a case of HTLV-1-related sensory neuronopathy heralding the classic HAM/TSP.
January 9, 2018: Journal of Neurovirology
https://www.readbyqxmd.com/read/29227540/human-t-lymphotropic-virus-1-htlv-1-pathogenesis-a-systems-virology-study
#14
Sayed-Hamidreza Mozhgani, Mohadeseh Zarei-Ghobadi, Majid Teymoori-Rad, Talat Mokhtari-Azad, Mehdi Mirzaie, Mohsen Sheikhi, Seyed-Mohammad Jazayeri, Ramin Shahbahrami, Hedayatollah Ghourchian, Mohieddin Jafari, Seyed-Abdolrahim Rezaee, Mehdi Norouzi
The main mechanisms of interaction between Human T-lymphotropic virus type 1 (HTLV-1) and its hosts in the manifestation of the related disease including HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP) and Adult T-cell leukemia/lymphoma (ATLL) are yet to be determined. It is pivotal to find out the changes in the genes expression toward an asymptomatic or symptomatic states. To this end, the systems virology analysis was performed. Firstly, the differentially expressed genes (DEGs) were taken pairwise among the four sample sets of Normal, Asymptomatic Carriers (ACs), ATLL, and HAM/TSP...
December 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29212212/adamts1-mediated-targeting-of-tsp-1-by-ppar%C3%AE-suppresses-migration-and-invasion-of-breast-cancer-cells
#15
Sun Ah Ham, Taesik Yoo, Won Jin Lee, Jung Seok Hwang, Jinwoo Hur, Kyung Shin Paek, Dae-Seog Lim, Sung Gu Han, Chi-Ho Lee, Han Geuk Seo
Migration and invasion of cancer cells into surrounding tissue is a key stage of cancer metastasis. Here, we show that peroxisome proliferator-activated receptor (PPAR) δ regulates migration and invasion of human breast cancer cells via thrombospondin-1 (TSP-1) and its degrading protease, a disintegrin and metalloprotease domains with thrombospondin motifs 1 (ADAMTS1). Activation of PPARδ by GW501516, a specific ligand for PPARδ, led to marked inhibition in the cell migration and TSP-1 expression of breast cancer...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29202792/the-cc-chemokine-ligand-ccl-1-upregulated-by-the-viral-transactivator-tax-can-be-downregulated-by-minocycline-possible-implications-for-long-term-treatment-of-htlv-1-associated-myelopathy-tropical-spastic-paraparesis
#16
Mineki Saito, Hiroe Sejima, Tadasuke Naito, Hiroshi Ushirogawa, Toshio Matsuzaki, Eiji Matsuura, Yuetsu Tanaka, Tatsufumi Nakamura, Hiroshi Takashima
BACKGROUND: Chemokine (C-C motif) ligand 1 (CCL1) is produced by activated monocytes/ macrophages and T-lymphocytes, and acts as a potent attractant for Th2 cells and a subset of T-regulatory (Treg) cells. Previous reports have indicated that CCL1 is overexpressed in adult T-cell leukemia cells, mediating an autocrine anti-apoptotic loop. Because CCL1 is also known as a potent chemoattractant that plays a major role in inflammatory processes, we investigated the role of CCL1 in the pathogenesis of human T-cell leukemia virus type 1 (HTLV-1)-associated myelopathy/tropical spastic paraparesis (HAM/TSP)...
December 4, 2017: Virology Journal
https://www.readbyqxmd.com/read/29186194/human-t-cell-leukemia-virus-type-1-infects-multiple-lineage-hematopoietic-cells-in-vivo
#17
Rie Furuta, Jun-Ichirou Yasunaga, Michi Miura, Kenji Sugata, Akatsuki Saito, Hirofumi Akari, Takaharu Ueno, Norihiro Takenouchi, Jun-Ichi Fujisawa, Ki-Ryang Koh, Yusuke Higuchi, Mohamed Mahgoub, Masakazu Shimizu, Fumihiko Matsuda, Anat Melamed, Charles R Bangham, Masao Matsuoka
Human T-cell leukemia virus type 1 (HTLV-1) infects mainly CD4+CCR4+ effector/memory T cells in vivo. However, it remains unknown whether HTLV-1 preferentially infects these T cells or this virus converts infected precursor cells to specialized T cells. Expression of viral genes in vivo is critical to study viral replication and proliferation of infected cells. Therefore, we first analyzed viral gene expression in non-human primates naturally infected with simian T-cell leukemia virus type 1 (STLV-1), whose virological attributes closely resemble those of HTLV-1...
November 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29129607/polymorphisms-in-hla-c-and-kir-alleles-are-not-associated-with-ham-tsp-risk-in-htlv-1-infected-subjects
#18
Tatiane Assone, Fernanda M Malta, Sonia Bakkour, Leilani Montalvo, Arthur M Paiva, Jerusa Smid, Augusto César Penalva de Oliveira, Fernanda de Toledo Gonçalves, Olinda do Carmo Luiz, Luiz Augusto M Fonseca, Philip J Norris, Jorge Casseb
INTRODUCTION: Several genetic polymorphisms may be related to susceptibility or resistance to viral disease outcomes. Immunological or genetic factors may act as major triggers of the immune pathogenesis of HAM/TSP. This study investigated the association of immune related genetic polymorphisms with viral and immunological markers. METHODS: 247 HTLV-1-infected volunteers, drawn from a larger group of HTLV-infected subjects followed at the Institute of Infectious Diseases "Emilio Ribas" (IIER) for up to 19 years, participated in this study, which ran from June 2011 to July 2016...
January 15, 2018: Virus Research
https://www.readbyqxmd.com/read/29095831/ct-chest-and-pulmonary-functional-changes-in-patients-with-htlv-associated-myelopathy-in-the-eastern-brazilian-amazon
#19
Luiz Fábio Magno Falcão, Aline Semblano Carreira Falcão, Rita Catarina Medeiros Sousa, Waldônio de Brito Vieira, Robson Tadachi Moraes de Oliveira, Valéria Marques Ferreira Normando, George Alberto da Silva Dias, Marcio Clementino de Souza Santos, Rodrigo Santiago Barbosa Rocha, Gilberto Toshimitsu Yoshikawa, Roberta Vilela Lopes Koyama, Satomi Fujihara, Víctor Augusto Cavaleiro Corrêa, Hellen Thais Fuzii, Juarez Antônio Simões Quaresma
The aim of this study was to compare computed tomography (CT) scans of chest and lung function among patients with Human T-Lymphotropic Virus Type 1 (HTLV) with and without HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP). In this cross-sectional study performed between January 2013 and June 2016, we included 48 patients with HAM/TSP (19 women and 11 men) and without HAM/TSP (12 women and 6 men). We compared CT findings and lung functions of these groups. Patients who had HAM/TSP had abnormal CT findings (P = 0...
2017: PloS One
https://www.readbyqxmd.com/read/29024167/imaging-spinal-cord-atrophy-in-progressive-myelopathies-htlv-i-associated-neurological-disease-ham-tsp-and-multiple-sclerosis-ms
#20
Shila Azodi, Govind Nair, Yoshimi Enose-Akahata, Emily Charlip, Ashley Vellucci, Irene Cortese, Jenifer Dwyer, B Jeanne Billioux, Chevaz Thomas, Joan Ohayon, Daniel S Reich, Steven Jacobson
OBJECTIVE: Previous work measures spinal cord thinning in chronic progressive myelopathies, including human T-lymphotropic virus 1 (HTLV-1)-associated myelopathy/tropical spastic paraparesis (HAM/TSP) and multiple sclerosis (MS). Quantitative measurements of spinal cord atrophy are important in fully characterizing these and other spinal cord diseases. We aimed to investigate patterns of spinal cord atrophy and correlations with clinical markers. METHODS: Spinal cord cross-sectional area was measured in individuals (24 healthy controls [HCs], 17 asymptomatic carriers of HTLV-1 (AC), 47 HAM/TSP, 74 relapsing-remitting MS [RRMS], 17 secondary progressive MS [SPMS], and 40 primary progressive MS [PPMS]) from C1 to T10...
November 2017: Annals of Neurology
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