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https://www.readbyqxmd.com/read/28627820/performance-of-the-liaison%C3%A2-xl-murex-rechtlv-i-ii-immunoassay-in-the-detection-of-htlv-1-2-antibodies-in-serum
#1
Pierre Gantner, Aurelie Velay, Nicolas Guigue, Heidi Barth, Marie-Josee Wendling, Constance Delaugerre, Samira Fafi-Kremer
BACKGROUND: Human T-cell lymphotropic virus type 1 and 2 (HTLV-1/2) immunoassays are used for blood screen- ing from blood products, milk, and organ donors. METHODS: We assessed the performance of the DiaSorin Liaison® XL murex recHTLV-I/II immunoassay relative to the Abbott Architect® rHTLV-I/II immunoassay and with the Innogenetics immunoblot as confirmation. RESULTS: A panel of HTLV positive (n = 66) and negative (n = 30) sera was tested in both techniques within the same freeze/thaw cycle...
May 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28627735/genetic-alterations-in-adult-t-cell-leukemia-lymphoma
#2
REVIEW
Yasunori Kogure, Keisuke Kataoka
Adult T-cell leukemia/lymphoma (ATL) is a peripheral T-cell neoplasm with a dismal prognosis, caused by human T-cell leukemia virus type-1 (HTLV-1) retrovirus. A long latency period from HTLV-1 infection to ATL onset suggests that not only HTLV-1 proteins, such as Tax and HBZ, but also additional genetic and/or epigenetic events are required for ATL development. Although many studies have demonstrated the biological functions of viral genes, alterations of cellular genes associated with ATL have not been fully investigated...
June 19, 2017: Cancer Science
https://www.readbyqxmd.com/read/28615198/polymorphic-nature-of-htlv-1-particle-cores-as-revealed-through-characterization-of-a-chronically-infected-cell-line
#3
Morgan E Meissner, Luiza Mendonça, Wei Zhang, Louis M Mansky
Human T-cell leukemia virus type 1 (HTLV-1) is the etiological agent of adult T-cell leukemia (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). HTLV-1 cell-to-cell transmission is dependent on the release of infectious virus particles into the virological synapse. HTLV-1 particle structure is still poorly understood, and previous studies have analyzed viruses produced by transformed lymphocytic cell lines chronically infected with HTLV-1, particularly the MT-2 cell line, which harbors truncated proviruses and expresses aberrant forms of the Gag protein...
June 14, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28608127/downregulation-of-histone-methyltransferase-ehmt2-in-cd4-t-cells-may-protect-htlv-1-infected-individuals-against-ham-tsp-development
#4
Camila Schoueri Colaço, Adriano Reis de Matos, Martha Silva Estrêla, Maurício Cristiano Rocha-Júnior, Kátia Kaori Otaguiri, Evandra Strazza Rodrigues, Osvaldo Massaiti Takayanagui, Dimas Tadeu Covas, Simone Kashima, Fabio Pittella Silva, Rodrigo Haddad
Approximately 5% of human T-cell leukemia virus type 1 (HTLV-1)-infected individuals will develop one of the HTLV-1-related diseases, such as HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) or adult T-cell leukemia. However, the mechanisms responsible for the appearance of symptoms have not been fully clarified. It is believed that viral factors, host genetic and epigenetic mechanisms are implicated in this process. Studies have shown the involvement of histone methyltransferases in retrovirus infection, but no study observed their expression in HTLV-1-infected patients...
June 12, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28606185/non-malarial-infectious-diseases-of-antenatal-care-in-pregnant-women-in-franceville-gabon
#5
Irene Pegha Moukandja, Edgard Brice Ngoungou, Guy Joseph Lemamy, Ulrick Bisvigou, Antoine Gessain, Fousseyni S Toure Ndouo, Mirdad Kazanji, Jean Bernard Lekana-Douki
BACKGROUND: In sub-tropical countries, infectious diseases remain one of the main causes of mortality. Because of their lack of active immunity, pregnant women and their unborn children represent the most susceptible people. In Gabon, data on infectious diseases of pregnant women such as syphilis and rubella are either scarce or very old. Few studies have assessed T. gondii infection during pregnancy in the country. Here, we evaluate seroprevalence of HIV, HTVL-1, syphilis and T. gondii and rubella infection during antenatal care among women living in Franceville, Gabon...
June 12, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28603669/combining-multi-dimensional-data-to-identify-key-genes-and-pathways-in-gastric-cancer
#6
Wu Ren, Wei Li, Daguang Wang, Shuofeng Hu, Jian Suo, Xiaomin Ying
Gastric cancer is an aggressive cancer that is often diagnosed late. Early detection and treatment require a better understanding of the molecular pathology of the disease. The present study combined data on gene expression and regulatory levels (microRNA, methylation, copy number) with the aim of identifying key genes and pathways for gastric cancer. Data used in this study was retrieved from The Cancer Genomic Atlas. Differential analyses between gastric cancer and normal tissues were carried out using Limma...
2017: PeerJ
https://www.readbyqxmd.com/read/28599462/detection-of-tax-specific-ctls-in-lymph-nodes-of-adult-t-cell-leukemia-lymphoma-patients-and-its-association-with-foxp3-positivity-of-regulatory-t-cell-function
#7
Ayako Ichikawa, Hiroaki Miyoshi, Fumiko Arakawa, Junichi Kiyasu, Kensaku Sato, Daisuke Niino, Yoshizo Kimura, Maki Yoshida, Riko Kawano, Hiroko Muta, Yasuo Sugita, Koichi Ohshima
Human T-cell lymphotropic virus type (HTLV)-1 Tax is a viral protein that has been reported to be important in the proliferation of adult T-cell leukemia/lymphoma (ATLL) cells and to be a target of HTLV-1-specific cytotoxic T lymphocytes (CTLs). However, it is not clear how Tax-specific CTLs behave in lymph nodes of ATLL patients. The present study analyzed the immunostaining of Tax-specific CTLs. Furthermore, ATLL tumor cells are known to be positive for forkhead box P3 (Foxp3)and to have a regulatory T (Treg)-cell-like function...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28596939/undifferentiated-pleomorphic-sarcoma-and-the-importance-of-considering-the-oncogenic-and-immune-suppressant-role-of-the-human-t-cell-lymphotropic-virus-type-1-a-case-report
#8
Sergio Lupo, Carolina Berini, Camila Cánepa, Eduardo Santini Araujo, Mirna Biglione
INTRODUCTION: Soft-tissue sarcomas account for 0.7% of all malignant tumors, with an incidence rate of 3 per 100,000 persons/year. The undifferentiated pleomorphic sarcoma (UPS) with giant cells, a high grade tumor of soft tissue, is very unusual, especially in young adults before the age of 40. Human T-cell lymphotropic virus type 1 (HTLV-1) is a human retrovirus, classified as group 1 human carcinogens by The International Agency for Research on Cancer, that causes an aggressive malignancy known as adult T-cell lymphoma/leukemia and a progressive chronic inflammatory neurological disease named HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP)...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28594273/effect-of-tpa-and-htlv-1-tax-on-brca1-and-ere-controlled-genes-expression
#9
Azhar Jabareen, Aya Abu-Jaafar, Ammar Abou-Kandil, Mahmoud Huleihel
Interference with the expression and/or functions of the multifunctional tumor suppressor BRCA1 leads to a high risk of breast and ovarian cancers. BRCA1 expression is usually activated by the estrogen (E2) liganded ERα receptor. Activated ERα is considered as a potent transcription factor which activates various genes expression by two pathways. A classical pathway, ERα binds directly to E2-responsive elements (EREs) in the promoters of the responsive genes and a non-classical pathway where ERα indirectly binds with the appropriate gene promoter...
June 8, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28592745/clinicopathological-features-of-cryptococcal-lymphadenitis-and-a-review-of-literature
#10
Keisuke Kawamoto, Hiroaki Miyoshi, Takaharu Suzuki, Reiji Muto, Kyohei Yamada, Eriko Yanagida, Mayuko Koshino, Yuya Sasaki, Jun Takizawa, Hirohito Sone, Yasuo Sugita, Masao Seto, Koichi Ohshima
Cryptococcosis is an invasive fungal infection in immunocompromised patients. The clinicopathological characteristics of cryptococcal lymphadenitis are not well known. We analyzed three cases of cryptococcal lymphadenitis and compared their characteristics with those in previous reports. Two patients were human immunodeficiency virus (HIV) carriers, and one patient was a human T-cell leukemia virus type-1 (HTLV-1) carrier. The age of the HTLV-1 carrier with cryptococcosis was much higher than that of the HIV-1 carriers...
June 8, 2017: Journal of Clinical and Experimental Hematopathology: JCEH
https://www.readbyqxmd.com/read/28586006/butein-inhibits-nf-%C3%AE%C2%BAb-ap-1-and-akt-activation-in-adult-t-cell-leukemia-lymphoma
#11
Chie Ishikawa, Masachika Senba, Naoki Mori
Human T-cell leukemia virus type 1 (HTLV-1) is the causative agent of adult T-cell leukemia/lymphoma (ATLL) but there is no effective treatment for HTLV-1-associated diseases. Herein, we determined the effect of butein, a bioactive plant polyphenol, on cell growth, apoptosis and signaling pathways in HTLV-1-infected T-cell lines and on tumor growth in SCID mice. Treatment with butein caused a decrease in viability of HTLV-1-infected T-cell lines. T cells cultured with butein showed obvious apoptosis morphology, and cleavage of poly(ADP-ribose) polymerase with activation of caspase-3, -8 and -9...
June 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28582585/early-onset-of-htlv-1-associated-myelopathy-tropical-spastic-paraparesis-ham-tsp-and-adult-t-cell-leukemia-lymphoma-atl-systematic-search-and-review
#12
Pedro D Oliveira, Amanda C Kachimarek, Achiléa L Bittencourt
Human T-cell lymphotropic virus type 1 (HTLV-1) is endemic in some regions and its vertical transmission occurs mainly through breastfeeding. About 10% of carriers develop associated diseases including HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP), adult T-cell leukemia/lymphoma (ATL) and infectious dermatitis associated with HTLV-1 (IDH). We searched for available case reports of early-onset HAM/TSP and ATL to evaluate demographic and disease aspects in infantile-juvenile patients. In the reviewed literature, 27 HAM/TSP and 31 ATL cases were found...
June 5, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28559645/comorbidity-between-htlv-1-associated-adult-t-cell-lymphoma-leukemia-and-verrucous-carcinoma-a-case-report
#13
Miller Valencia, Luis Moreno
BACKGROUND: Adult T-cell Leukemia/Lymphoma (ATLL) is classified as a peripheral CD4+ T-cell neoplasm caused by the human T-cell lymphotropic virus type 1 (HTLV-1). Typical symptoms are associated with leukemic infiltration; however, atypical and exaggerated manifestations of verrucous carcinoma have also been described. CASE REPORT: We present here the case of a patient with multiple skin lesions, ischemic necrosis in the hallux and lymphadenopathies. Biopsies were taken, which showed verrucous epidermal carcinoma and cutaneous lymphoma...
March 30, 2017: Colombia Médica: CM
https://www.readbyqxmd.com/read/28540757/association-of-tuberculosis-status-with-neurologic-disease-and-immune-response-in-htlv-1-infection
#14
Anselmo Souza, Natália Carvalho, Yuri Neves, Silvane Braga Santos, Maria de Lourdes Bastos, Sergio Arruda, Eduardo Martins Netto, Marshall Glesby, Edgar Carvalho
The human T-cell lymphotropic virus type 1 (HTLV-1) is the etiologic agent of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). HTLV-1 infected individuals have increased susceptibility to Mycobacterium tuberculosis infection but the influence of tuberculosis on the course of HTLV-1 infection is unknown. The aim of this study was to evaluate the influence of tuberculosis on immunological, virologic, and neurologic features of HTLV-1 infection. This is a retrospective analysis of individuals enrolled in a cohort study from an HTLV-1 clinic who were evaluated for past or latent tuberculosis and classified clinically as HTLV-1 carriers, probable HAM/TSP and definite HAM/TSP...
May 25, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28536850/effectiveness-of-daily-prednisolone-to-slow-progression-of-human-t-lymphotropic-virus-type-1-associated-myelopathy-tropical-spastic-paraparesis-a-multicenter-retrospective-cohort-study
#15
Ariella L G Coler-Reilly, Tomoo Sato, Toshio Matsuzaki, Masanori Nakagawa, Masaaki Niino, Masahiro Nagai, Tatsufumi Nakamura, Norihiro Takenouchi, Natsumi Araya, Naoko Yagishita, Eisuke Inoue, Yoshihisa Yamano
Millions of people are infected with human T-lymphotropic virus type 1 (HTLV-1) worldwide; notable endemic areas include Brazil, the Caribbean islands, Iran, and Japan. A small number of those infected develop the progressive neurodegenerative disease HTLV-1-associated myelopathy (HAM), also known as tropical spastic paraparesis (TSP), which is characterized by chronic spinal cord inflammation and accompanying myelopathic symptoms. The corticosteroid prednisolone (PSL) is a classic treatment for HAM/TSP, yet its effectiveness remains controversial owing to insufficient and conflicting studies...
May 23, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28534499/cis-perturbation-of-cancer-drivers-by-the-htlv-1-blv-proviruses-is-an-early-determinant-of-leukemogenesis
#16
Nicolas Rosewick, Keith Durkin, Maria Artesi, Ambroise Marçais, Vincent Hahaut, Philip Griebel, Natasa Arsic, Véronique Avettand-Fenoel, Arsène Burny, Carole Charlier, Olivier Hermine, Michel Georges, Anne Van den Broeke
Human T-cell leukaemia virus type-1 (HTLV-1) and bovine leukaemia virus (BLV) infect T- and B-lymphocytes, respectively, provoking a polyclonal expansion that will evolve into an aggressive monoclonal leukaemia in ∼5% of individuals following a protracted latency period. It is generally assumed that early oncogenic changes are largely dependent on virus-encoded products, especially TAX and HBZ, while progression to acute leukaemia/lymphoma involves somatic mutations, yet that both are independent of proviral integration site that has been found to be very variable between tumours...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28514743/htlv-1-tax-upregulates-early-growth-response-protein-1-through-nuclear-factor-%C3%AE%C2%BAb-signaling
#17
Qingsong Huang, Zhiguo Niu, Jingxian Han, Xihong Liu, Zhuangwei Lv, Huanhuan Li, Lixiang Yuan, Xiangping Li, Shuming Sun, Hui Wang, Xinxiang Huang
Human T cell leukemia virus type 1 (HTLV-1) is a complex retrovirus that causes adult T cell leukemia (ATL) in susceptible individuals. The HTLV-1-encoded oncoprotein Tax induces persistent activation of the nuclear factor-κB (NF-κB) pathway. Early growth response protein 1 (EGR1) is overexpressed in HTLV-1-infected T cell lines and ATL cells. Here, we showed that both Tax expression and HTLV-1 infection promoted EGR1 overexpression. Loss of the NF-κB binding site in the EGR1 promotor or inhibition of NF-κB activation reduced Tax-induced EGR1 upregulation...
May 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28484158/adult-t-cell-leukemia-lymphoma-complicated-by-takotsubo-cardiomyopathy-and-htlv-1-associated-myelopathy-after-treatment-with-the-anti-ccr4-antibody-mogamulizumab
#18
Satoshi Yamanaka, Kazutaka Nakayama, Hayato Tamai, Masanori Sakamaki, Koiti Inokuchi
Adult T-cell leukemia-lymphoma (ATL) caused by human T-lymphotropic virus type 1 (HTLV-1) is generally associated with poor prognosis. The anti-CCR4 antibody mogamulizumab is one of the options for refractory or relapsed ATL. Mogamulizumab is intravenously administered as a single agent at a dose of 1.0 mg/kg once a week for 8 weeks. The overall response rate is reported to be 50%. Reported common adverse events after administration of mogamulizumab are leukocytopenia, infusion reaction, and skin rash. Although rare, mogamulizumab-associated cardiomyopathy has also been reported...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28466382/assessment-of-htlv-1-proviral-load-lat-bim-c-fos-and-rad51-gene-expression-in-adult-t-cell-leukemia-lymphoma
#19
Samaneh Ramezani, Abbas Shirdel, Houshang Rafatpanah, Mohammad Mehdi Akbarin, Hanieh Tarokhian, Hossein Rahimi, Alireza Bari, Hamid Reza Jahantigh, Seyed Abdolrahim Rezaee
Adult T cell leukemia/lymphoma (ATLL) is a life-threatening malignancy of HTLV-1 infected Th lymphocytes. In the present study host-virus interactions were investigated by assessment of HTLV-1 proviral load (PVL) and host gene expression. A cross-sectional study was carried out on 18 ATLL, 10 HAM/TSP patients and 18 HTLV-1 asymptomatic carriers (ACs). DNA and mRNA of the peripheral blood mononuclear cells were extracted for PVL and LAT, BIM, c-FOS and RAD51 gene expression measurement using qRT-PCR. The mean PVL in ATLL patients was 11,430 ± 3770 copies/10(4) which was statistically higher than ACs, 530 ± 119 copies/10(4), (p < 0...
May 2, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28463883/htlv-1-infection-and-disease-in-spain
#20
Carmen de Mendoza, Estrella Caballero, Antonio Aguilera, Silvia Requena, Raúl Ortiz de Lejarazu, María Pirón, Rocío González, Ana Jiménez, Lourdes Roc, Ana Treviño, Rafael Benito, Miriam Fernández-Alonso, Aitziber Aguinaga, Carmen Rodríguez, Juan García-Costa, Lidia Blanco, José M Ramos, Enrique Calderón, José M Eirós, Silvia Sauleda, Pablo Barreiro, Vicente Soriano
: Human T-lymphotropic virus type 1 (HTLV-1) infection is a neglected disease despite roughly 15 million people are chronically infected worldwide. Lifelong less than 10% of carriers develop life-threatening diseases, mostly a subacute myelopathy known as tropical spastic paraparesis (TSP) and a lymphoproliferative disorder named adult T-cell leukemia (ATL). HTLV-1 is efficiently transmitted perinatally (breastfeeding), sexually (more from male to female) and parenterally (transfusions, injection drug use and transplants)...
May 1, 2017: AIDS
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