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https://www.readbyqxmd.com/read/29035157/evaluation-of-serum-levels-of-c3-and-c4-complement-factors-in-patients-with-beta-thalassemia-major-in-khuzestan-province-southwest-iran
#1
Mehri Ghafourian, Mehrnosh Esmaeili, Alireza Sadeghi, Ali Malekei Naseri, Nader Dashti-Gerdabi
BACKGROUND AND OBJECTIVES: Thalassemia syndrome is the most common genetic disorder in the world and infection is the second cause of death in these patients. Measurement of serum C3 and C4 complement factors in serum was done in 60 patients with beta-thalassemia major in comparison with 30 healthy subjects as control group. MATERIALS AND METHODS: The serum level of C3 and C4 complement factors in 60 patients with beta-thalassemia major who were randomly selected from among the patients referred to Shafa Hospital of Ahvaz was evaluated and compared with 30 samples from healthy individuals with no history of recent infectious or autoimmune diseases...
October 16, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/29030134/a1at-polymorphisms-may-be-associated-with-clinical-characteristics-of-retrovirus-infections-in-a-mixed-ethnic-population-from-the-brazilian-amazon-region
#2
Thalita Camêlo da Silva Ferreira, Maria Alice Freitas Queiroz, Gustavo Adolfo Argañaraz, Ricardo Ishak, Antonio Carlos Rosário Vallinoto, Enrique Roberto Argañaraz
OBJECTIVES: The present study investigated the association of alpha-1-antrypsin deficiency (S and Z polymorphisms), with HIV-1 and HTLV-1 infection. METHODS: Blood samples from 201 HIV-1 and 115 HTLV-1 infected individuals were examined and compared with 300 healthy controls. Genotyping of A1AT (S and Z) and quantification of plasma viral load were performed using RT-PCR and TCD4+/CD8+ cell count was determined by flow cytometry. RESULTS: The wild-type MM genotype showed a higher frequency in the three groups investigated...
October 10, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29024167/imaging-spinal-cord-atrophy-in-progressive-myelopathies-htlv-i-associated-neurologic-disease-ham-tsp-and-multiple-sclerosis-ms
#3
Shila Azodi, Govind Nair, Yoshimi Enose-Akahata, Emily Charlip, Ashley Vellucci, Irene Cortese, Jennifer Dwyer, B Jeanne Billioux, Thomas Chevaz, Joan Ohayon, Daniel S Reich, Steven Jacobson
OBJECTIVE: Previous work measures spinal cord thinning in chronic progressive myelopathies, including 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 (HC), 17 asymptomatic carriers of HTLV-1 (AC), 47 HAM/TSP, 74 RRMS, 17 SPMS, and 40 PPMS) from C1 to T10...
October 10, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28993637/htlv-1-bzip-factor-suppresses-tdp1-expression-through-inhibition-of-nrf-1-in-adult-t-cell-leukemia
#4
Yoko Takiuchi, Masayuki Kobayashi, Kohei Tada, Fumie Iwai, Maki Sakurada, Shigeki Hirabayashi, Kayoko Nagata, Kotaro Shirakawa, Keisuke Shindo, Jun-Ichirou Yasunaga, Yasuhiro Murakawa, Vinodh Rajapakse, Yves Pommier, Masao Matsuoka, Akifumi Takaori-Kondo
Adult T-cell leukemia (ATL) is an aggressive T-cell malignancy caused by human T-cell leukemia virus type 1 (HTLV-1). We recently reported that abacavir, an anti-HIV-1 drug, potently and selectively kills ATL cells. This effect was attributed to the reduced expression of tyrosyl-DNA-phosphodiesterase 1 (TDP1), a DNA repair enzyme, in ATL cells. However, the molecular mechanism underlying the downregulation of TDP1 in ATL cells remains elusive. Here we identified the core promoter of the TDP1 gene, which contains a conserved nuclear respiratory factor 1 (NRF-1) binding site...
October 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28991665/spinal-cord-anteroposterior-atrophy-in-ham-tsp-magnetic-resonance-imaging-and-neuropathological-analyses
#5
Akitoshi Taniguchi, Hitoshi Mochizuki, Atsushi Yamashita, Kazutaka Shiomi, Yujiro Asada, Masamitsu Nakazato
To evaluate the spinal cord atrophy that occurs in HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), we conducted magnetic resonance imaging (MRI) and pathological analyses. In the MRI study, 15 patients with HAM/TSP and 20 age-matched normal control subjects were enrolled. Anteroposterior and transverse distances and cross-sectional areas were measured and calculated at the C2, C4, C6, T2, and T6 vertebral levels. In the pathological study, spinal cord autopsy specimens were compared between a HAM/TSP case and an adult T cell leukemia/lymphoma case...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28985098/retinal-nerve-fiber-layer-thickness-in-human-t-cell-lymphotropic-virus-type-1-patients
#6
Harold Merle, Rabih Hage, Séverine Jeannin, Philippe Cabre, Stéphane Olindo
PURPOSE: To determine whether there is an optic neuropathy (ON) in patients with human T-cell lymphotropic virus type 1 (HTLV-1) infection. METHODS: We included HTLV-1 asymptomatic carriers (a.c.HTLV-1) and tropical spastic paraparesis/HTLV-1 associated myelopathy (TSP/HAM) patients between January 1st, 2014 and March 31st, 2015. All patients had complete eye examination. The visual acuity (VA) and retinal nerve fiber layer (RNFL) thickness were measured and compared to age- and sex-matched control groups including patients seen in our refraction clinic with no previous medical or surgical history...
October 6, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28983187/viral-causes-of-lymphoma-the-history-of-epstein-barr-virus-and-human-t-lymphotropic-virus-1
#7
REVIEW
Daniel Esau
In 1964, Epstein, Barr, and Achong published a report outlining their discovery of viral particles in lymphoblasts isolated from a patient with Burkitt lymphoma. The Epstein-Barr virus (EBV) was the first human cancer virus to be described, and its discovery paved the way for further investigations into the oncogenic potential of viruses. In the decades following the discovery of EBV, multinational research efforts led to the discovery of further viral causes of various human cancers. Lymphomas are perhaps the cancer type that is most closely associated with oncogenic viruses: infection with EBV, human T-lymphotropic virus 1 (HTLV-1), human immunodeficiency virus (HIV), Kaposi sarcoma-associated herpesvirus/human herpesvirus 8, and hepatitis C virus have all been associated with lymphomagenesis...
2017: Virology: Research and Treatment
https://www.readbyqxmd.com/read/28981470/telomere-dynamics-in-immune-senescence-and-exhaustion-triggered-by-chronic-viral-infection
#8
REVIEW
Marcia Bellon, Christophe Nicot
The progressive loss of immunological memory during aging correlates with a reduced proliferative capacity and shortened telomeres of T cells. Growing evidence suggests that this phenotype is recapitulated during chronic viral infection. The antigenic volume imposed by persistent and latent viruses exposes the immune system to unique challenges that lead to host T-cell exhaustion, characterized by impaired T-cell functions. These dysfunctional memory T cells lack telomerase, the protein capable of extending and stabilizing chromosome ends, imposing constraints on telomere dynamics...
October 5, 2017: Viruses
https://www.readbyqxmd.com/read/28978843/current-status-of-atl-research-efforts-for-prevention-and-precision-medicine-for-atl
#9
Toshiki Watanabe
The introduction of new agents and hematopoietic stem cell transplantation into the treatment of ATL has activated its clinical research. However, the prognosis of ATL remains poor compared with those of other leukemias and lymphomas. Thus, seemingly we have to reconsider a new strategy of ATL therapy based on its unique characteristics. HTLV-1 infection of T cells results in clonal proliferation of infected cells that accumulate genetic and epigenetic abnormalities before the onset of ATL. Therefore, the treatment strategy should include the prevention of HTLV-1 infection and ATL development in addition to precision medicine based on the stratification of ATL cases by biomarkers that discriminate clinical stages of ATL...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28978842/molecular-pathogenesis-and-its-therapeutic-implication-for-atl
#10
Kenji Ishitsuka
Adult T-cell leukemia/lymphoma (ATL) is a peripheral T-cell malignancy caused by human T-lymphotropic virus type I (HTLV-1). HTLV-1 related proteins Tax and HTLV-1 bZIP factor induce immortalization and transformation of HTLV-1-infected T-lymphocytes and eventually induce clonal proliferation. One of the apparent molecular features in ATL cells is abundant genomic abnormalities targeting characteristic pathways, including T-cell receptor signaling and the NF-κB pathway, G-protein coupled-receptor, including CCR4, and transcriptional regulation...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28976997/transcription-analysis-of-the-responses-of-porcine-heart-to-erysipelothrix-rhusiopathiae
#11
Chao Kang, Qiang Zhang, Weifeng Zhu, Chengzhi Cai, Xiaomei Sun, Meilin Jin
Erysipelothrix rhusiopathiae (E. rhusiopathiae) is the causative agent of swine erysipelas. This microbe has caused great economic losses in China and in other countries. In this study, high-throughput cDNA microarray assays were employed to evaluate the host responses of porcine heart to E. rhusiopathiae and to gain additional insights into its pathogenesis. A total of 394 DE transcripts were detected in the active virulent E. rhusiopathiae infection group compared with the PBS group at 4 days post-infection...
2017: PloS One
https://www.readbyqxmd.com/read/28965728/glucose-metabolism-and-oxygen-availability-govern-reactivation-of-the-latent-human-retrovirus-htlv-1
#12
Anurag Kulkarni, Manuel Mateus, Cyrille C Thinnes, James S McCullagh, Christopher J Schofield, Graham P Taylor, Charles R M Bangham
The human retrovirus HTLV-1 causes a hematological malignancy or neuroinflammatory disease in ∼10% of infected individuals. HTLV-1 primarily infects CD4(+) T lymphocytes and persists as a provirus integrated in their genome. HTLV-1 appears transcriptionally latent in freshly isolated cells; however, the chronically active anti-HTLV-1 cytotoxic T cell response observed in infected individuals indicates frequent proviral expression in vivo. The kinetics and regulation of HTLV-1 proviral expression in vivo are poorly understood...
September 6, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28960337/reconsideration-of-blood-donation-testing-strategy-for-human-t-cell-lymphotropic-virus-in-australia
#13
C E Styles, C R Seed, V C Hoad, S Gaudieri, A J Keller
BACKGROUND AND OBJECTIVES: Universal testing of blood donations for human T-cell lymphotropic virus (HTLV) in Australia may no longer be appropriate given the low prevalence of HTLV infection and the mitigating effect of universal leucodepletion for cellular components. This study aimed to determine the most appropriate HTLV testing strategy using the Risk-Based Decision-Making Framework for Blood Safety. MATERIALS AND METHODS: The risk of HTLV transfusion-transmission using three testing strategies (universal, new-donor and no testing) and cost-effectiveness of the first two strategies were assessed using adaptations of published mathematical models...
September 27, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28959124/higher-expression-of-activation-induced-cytidine-deaminase-is-significantly-associated-with-merkel-cell-polyomavirus-negative-merkel-cell-carcinomas
#14
Michiko Matsushita, Takeshi Iwasaki, Daisuke Nonaka, Satoshi Kuwamoto, Keiko Nagata, Masako Kato, Yukisato Kitamura, Kazuhiko Hayashi
BACKGROUND: Merkel cell carcinomas (MCCs), clinically aggressive neuroendocrine skin cancers, are divided into Merkel cell polyomavirus (MCPyV)-positive and -negative tumors, which show different clinicopathological features and may develop through different mechanisms of carcinogenesis. Aberrant expression of activation-induced cytidine deaminase (AID) as a genomic modulator was demonstrated through pathogen-related NF-κB signal in Helicobacter pylori-associated gastric cancer, adult T cell leukemia/lymphoma (HTLV-1), hepatoma (HCV), and Burkitt lymphoma (EBV)...
September 2017: Yonago Acta Medica
https://www.readbyqxmd.com/read/28955936/is-unphosphorylated-rex-as-multifunctional-protein-of-htlv-1-a-fully-intrinsically-disordered-protein-an-in-silico-study
#15
Mitra Kheirabadi, Majid Taghdir
Intracellularlocation of a viral unspliced mRNA in host cell is a crucial factor for normal life of the virus. Rex is a neucleo-cytoplasmic shuffling protein of Human T-cell Leukemia Virus-1(HTLV-1)which has important role in active transport of cargo-containing RNA from nucleus to cytoplasm. Therefore, it plays a crucial role in the disease development by the virus. In spite of its importance, the 3d-structurephosphorylated and unphosphorylated of this protein has not been determined. In this study, first we predicted whether Rex protein is an ordered or disordered protein...
December 2016: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28954352/-hsp90-inhibitor-17-aag-plays-an-important-role-in-jak3-stat5-signaling-pathways-in-htlv-1-infection-cell-line-hut-102
#16
Q Q Yang, H Tan, Z P Fu, Q Ma, J L Song
Objective: To analyze whether heat-shock protein 90 (HSP90) be involved in a permanently abnormal activated JAK/STAT signaling in ATL cells in vitro. Methods: The effect of 17-AAG on proliferation of ATL cell lines HUT-102 was assessed using CCK8 at different time points. Cell apoptosis was measured by flow cytometry. The specific proteins HSP90, STAT5, p-STAT5 and JAK3 were detected by Western blotting. Results: Overexpression of HSP90 in HUT-102 cell lines was disclosed (P<0.05) , and constitutive activation of JAK3/STAT5 signaling was observed in HTLV-1-infected T-cell lines but not in normal PBMCs; Treatment of ATL cell lines with 17-AAG led to reduced cell proliferation, but there was no significant change in terms of cell proliferation when the concentration of 17-AAG between 2 000-8 000 nmol/L (P>0...
August 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28954118/case-for-diagnosis-infective-dermatitis-associated-with-htlv-1-differential-diagnosis-of-atopic-dermatitis
#17
Lorena Maria Lima de Oliveira, Marcos Vilela de Souza, Antonio Carlos Martins Guedes, Marcelo Grossi Araújo
Infective dermatitis associated with HTLV-1 (IDH) is the main cutaneous marker of HTLV-1 infection. This disease occurs primarily in children and should be differentiated from other eczemas, especially from atopic dermatitis. The largest series of IDH are from Jamaica and Brazil. There are an estimated 15 to 20 million infected people in the world, and Brazil is one of the endemic regions. Studies suggest that IDH in children may be a marker for the development of T-cell leukemia/lymphoma (ATL) or myelopathy associated with HTLV-1/tropical spastic paraparesis (HAM / TSP) in adulthood...
July 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28939495/seroprevalence-of-strongyloides-stercoralis-infection-among-htlv-i-infected-blood-donors-in-barcelona-spain-a-cross-sectional-study
#18
Fernando Salvador, Elena Sulleiro, Maria Piron, Adrián Sánchez-Montalvá, Silvia Sauleda, Israel Molina
Strongyloides stercoralis infection in patients with HTLV-I infection may lead to severe clinical manifestations. The aim of the present study is to determine the seroprevalence of S. stercoralis infection among blood donors who tested positive for HTLV-I infection. A cross-sectional study was performed at the Vall d'Hebron University Hospital (Barcelona, Spain) in 2016. Serum samples from HTLV-I positive patients diagnosed from 2008 to 2015 were retrieved from the Blood Bank, and S. stercoralis serology was performed...
December 2017: Acta Tropica
https://www.readbyqxmd.com/read/28920078/notch1-activation-depletes-the-pool-of-side-population-stem-cells-in-atl
#19
Xue Tao Bai, Chien-Hung Yeh, Christophe Nicot
BACKGROUND: HTLV-I infection is associated with the development of adult T-cell leukemia (ATL), a malignancy characterized by a high rate of disease relapse and poor survival. Previous studies reported the existence of side population (SP) cells in HTLV-I Tax transgenic mouse models. These studies showed that these ATL-like derived SP cells have both self-renewal and leukemia renewal capacity and represent Cancer Stem Cells (CSC)/Leukemia-Initiating Cells (LIC). Since CSC/LIC are resistant to conventional therapies, a better characterization is needed...
June 2017: Journal of Cancer Sciences
https://www.readbyqxmd.com/read/28910419/il-10-mediated-signals-act-as-a-switch-for-lymphoproliferation-in-human-t-cell-leukemia-virus-type-1-infection-by-activating-the-stat3-and-irf4-pathways
#20
Leila Sawada, Yoshiko Nagano, Atsuhiko Hasegawa, Hikari Kanai, Kai Nogami, Sayaka Ito, Tomoo Sato, Yoshihisa Yamano, Yuetsu Tanaka, Takao Masuda, Mari Kannagi
Human T-cell leukemia virus type-1 (HTLV-1) causes two distinct diseases, adult T-cell leukemia/lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Since there are no disease-specific differences among HTLV-1 strains, the etiological mechanisms separating these respective lymphoproliferative and inflammatory diseases are not well understood. In this study, by using IL-2-dependent HTLV-1-infected T-cell lines (ILTs) established from patients with ATL and HAM/TSP, we demonstrate that the anti-inflammatory cytokine IL-10 and its downstream signals potentially act as a switch for proliferation in HTLV-1-infected cells...
September 2017: PLoS Pathogens
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