Abstract:
:Nonsense-mediated mRNA decay (NMD) is an essential and conserved cellular mRNA quality control mechanism. RNA signals to express viral genes from overlapping open reading frames potentially initiate NMD, nevertheless it is not clear whether viral RNAs are sensitive to NMD or if viruses have evolved mechanisms to evade NMD. Here we demonstrate that the genomic and full-length mRNAs of Human-T-cell Leukemia Virus type-I (HTLV-1), a retrovirus responsible for Adult T-cell Leukemia (ATL), are sensitive to NMD. They exhibit accelerated turnover in NMD-activated cells, while siRNA-mediated knockdown of NMD-master-regulator, UPF1, promotes enhanced stability of them. These effects on RNA stability were recapitulated by a reporter construct encoding the HTLV-1 translational frameshift signal of gag-pol. In agreement with the RNA stability, viral protein expression from the integrated provirus was inversely correlated with cellular NMD activity. We further demonstrated that the viral RNA-binding protein, Rex, approves the stability of viral RNA by inhibiting NMD. Significantly, Rex establishes a general block to NMD, as both NMD-responsive reporter transcripts and natural host-encoded NMD substrates were stabilized in the presence of Rex. Thus, we suggest that Rex not only stabilizes viral transcripts, but also perturbs cellular mRNA metabolism and host cell homeostasis via inhibition of NMD.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Nakano K,Ando T,Yamagishi M,Yokoyama K,Ishida T,Ohsugi T,Tanaka Y,Brighty DW,Watanabe Tdoi
10.1016/j.micinf.2013.03.006subject
Has Abstractpub_date
2013-06-01 00:00:00pages
491-505issue
6-7eissn
1286-4579issn
1769-714Xpii
S1286-4579(13)00064-6journal_volume
15pub_type
杂志文章abstract::Monoxenous trypanosomatids usually have an invertebrate as the only host in their life cycles, however, they have been found repeatedly in plants and/or mammals. To succeed in colonizing a vertebrate host, the parasite must quickly adapt to drastic changes in the environment (e.g. temperature), which reflect the condi...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2010.07.010
更新日期:2010-11-01 00:00:00
abstract::Twenty years ago we reported the first synthetic peptide-based anti-malarial vaccine named SPf66, which conferred limited protective efficacy in large-scale human field-trials. Our efforts towards a second vaccine generation based on the rational selection of conserved high activity binding peptides (HABPs) whose crit...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/j.micinf.2007.02.004
更新日期:2007-05-01 00:00:00
abstract::The Mycobacterium abscessus complex can cause fatal pulmonary disease, especially in cystic fibrosis patients. Diagnosing M. abscessus complex pulmonary disease is challenging. Immunologic assays specific for M. abscessus are not available. In this study seven clinical M. abscessus complex strains and the M. abscessus...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2018.10.006
更新日期:2019-01-01 00:00:00
abstract::Matrix metalloproteinases constitute a family of structurally related endopeptidases that are crucial for the normal turnover of the extracellular matrix. Elevated levels of MMP-9 have been demonstrated in synovial fluids of rheumatoid arthritis patients, and a correlation with the severity of the disease has been des...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2006.01.001
更新日期:2006-05-01 00:00:00
abstract::While the Vif protein of human immunodeficiency virus type 1 (HIV-1) is essential for viral replication in non-permissive cells, it is rapidly degraded intracellularly. We have previously suggested that the rapid turn-over of Vif is biologically meaningful to prevent detrimental effects of this protein at high express...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2004.04.011
更新日期:2004-07-01 00:00:00
abstract::In this study, the effect of Yersinia derivatives on nitric oxide (NO), hydrogen peroxide (H2O2) and tumor necrosis factor-alpha (TNF-alpha) production by murine peritoneal macrophages was investigated. Addition of lipopolysaccharide (LPS) to the macrophage culture resulted in NO production that was dose dependent. On...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2003.10.012
更新日期:2004-02-01 00:00:00
abstract::Genome sequences of 36 Rickettsia and Orientia were analyzed using Formal Order Analysis (FOA). This approach takes into account arrangement of nucleotides in each sequence. A numerical characteristic, the average distance (remoteness) - "g" was used to compare of genomes. Our results corroborated previous separation ...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2015.09.012
更新日期:2015-11-01 00:00:00
abstract::In the present study, we compared the B cell response of BALB/c and C57Bl/6 mice during Cryptococcus neoformans infection. This response was investigated using virulent serotype D forms of mating types alpha and a (MAT alpha and MAT a). C57Bl/6 mice showed massive (mainly cerebral) infection by both types, while BALB/...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2004.09.009
更新日期:2005-01-01 00:00:00
abstract::BCG rectal administration to newborn and adult mice induced protective immune responses against tuberculosis. BCG reaches the sub-epithelial site and the draining mesenteric lymph nodes (MLNs), and dendritic cells (DC) could be recruited to these sites. Using polarized Caco-2 epithelial cells, we showed that BCG trans...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2006.03.022
更新日期:2006-08-01 00:00:00
abstract::Effective vaccines against infectious diseases and biological warfare agents remain an urgent public health priority. Studies have characterized the differentiation of effector and memory T cells and identified a subset of T cells capable of conferring enhanced protective immunity against pathogen challenge. We hypoth...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2007.07.009
更新日期:2007-10-01 00:00:00
abstract::To investigate the association of viral infections with chronic fatigue syndrome (CFS), we assayed 2', 5'-oligoadenylate synthetase (2-5AS) activities in peripheral blood mononuclear cells from CFS patients in Japan. These patients were diagnosed in two hospitals, H1 and H2, located in different areas of the country. ...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2003.07.002
更新日期:2003-10-01 00:00:00
abstract::Viral infections induce first a loss and then an increase in natural killer (NK) and CD8(+) T cells. NK cells expressing Ly49G2 were selectively expanded by several viruses and poly I:C. CD8(+) T cells expressing Ly49G2 were selectively expanded by poly I:C and participated in the antigen-specific response to lymphocy...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/s1286-4579(02)00031-x
更新日期:2002-12-01 00:00:00
abstract::Several glycoforms of CD43 are known to regulate cellular interactions in the immune system. One such glycoform, the CD43 that bears core 2 O-glycans, is also known to be expressed on T lymphocytes and natural killer cells, but only after their activation. Previous studies have also shown that when Caco-2 cells, which...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/s1286-4579(01)01431-9
更新日期:2001-07-01 00:00:00
abstract::Attenuated pre-erythrocytic stage malaria vaccines protect humans from sporozoite challenge. Current technology limits the feasibility of their commercial scale production and poses a significant risk of contamination with transmissible agents. Overcoming these barriers will be very challenging. In contrast, subunit v...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/j.micinf.2007.02.006
更新日期:2007-05-01 00:00:00
abstract::Although Pneumocystis carinii pneumonia is one of the leading causes of morbidity and mortality among patients with the acquired immunodeficiency syndrome, many questions about its epidemiology and transmission remain unanswered. Whereas traditional theory postulates that the disease results from reactivation of laten...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/s1286-4579(01)01514-3
更新日期:2002-01-01 00:00:00
abstract::Helicobacter pylori infection induces chronic inflammation in the gastric mucosa with a marked increase in the number of lymphoid follicles consisting of infiltrating B and T cells, neutrophils, dendritic cells (DC) and macrophages. It has been suggested that an accumulation of mature DC in the tissue, resulting from ...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.10.007
更新日期:2006-03-01 00:00:00
abstract::The bacterium Haemophilus ducreyi causes the sexually transmitted disease chancroid, which is characterized by the appearance of mucocutaneous, persistent ulcers on the external genitals. To identify carbohydrate receptors that mediate the attachment of this pathogen to host cells, we investigated the binding of 35S-m...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2006.05.009
更新日期:2006-08-01 00:00:00
abstract::Moraxella catarrhalis has again been recognized as a significant pathogen. The past decade has witnessed an increased amount of research and understanding of the pathogenesis of the organism. This review will summarize the research pertaining to the epidemiology and components of pathogenesis in M. catarrhalis. ...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/s1286-4579(00)00314-2
更新日期:2000-04-01 00:00:00
abstract::Lactobacillus colonisation was examined in 112 Swedish infants. Faecal samples obtained at 1, 2, 4 and 8 weeks and at 6, 12 and 18 months of age were cultivated quantitatively on Rogosa agar. Lactobacilli were speciated by PCR and typed to the strain level by randomly amplified polymorphic DNA (RAPD). Lactobacilli rea...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.04.011
更新日期:2005-08-01 00:00:00
abstract::Few human pathogens possess the ability exhibited by Candida albicans to colonize and cause symptomatic infections at different body sites. The host immune system is the major factor determining whether this opportunistic yeast behaves as a commensal or as a pathogen, since C. albicans strains appear capable of expres...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.09.016
更新日期:2006-03-01 00:00:00
abstract::Since it was first described as having the ability to inhibit macrophage activation, transforming growth factor-beta (TGF-beta) has been analyzed for its role in regulating immune responses to a variety of pathogens, including viruses, bacteria, yeast, and protozoa. Most of the studies have involved organisms that inf...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/s1286-4579(99)00252-x
更新日期:1999-12-01 00:00:00
abstract::African trypanosomes (prototype: Trypanosoma brucei) are flagellated protozoan parasites that infect a wide variety of mammals, causing nagana in cattle and sleeping sickness in humans. These organisms can cause prolonged chronic infections due to their ability to successively expose different antigenic variants of th...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.10.002
更新日期:2006-03-01 00:00:00
abstract::Recombinant BCG strain that secretes the chimaeric protein of Ag85B and ESAT-6 has been demonstrated to augment Th1 immune response in C57BL/6 mice. In this paper, we studied the immunostimulatory activity of the recombinant BCG strains in vitro and found out that rBCG-A(N)-E-A(C) activated THP-1 cells and induced hig...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2010.04.002
更新日期:2010-08-01 00:00:00
abstract::Phagocytosis is important in immune defense and development in vertebrates and invertebrates. It leads to swift ingestion of microorganisms and dying cells by phagocytes. How particles are recognized is not well understood. Studies in insects, and Drosophila in particular, argue that these are powerful model systems t...
journal_title:Microbes and infection
pub_type: 杂志文章,评审
doi:10.1016/s1286-4579(00)00304-x
更新日期:2000-03-01 00:00:00
abstract::We previously reported prolonged HIV-1 transcriptional gene silencing by an RNA duplex targeting a sequence located within the NF-kappaB binding motif of the HIV-1 promoter in a susceptible HeLa cell line. Here we report extremely prolonged suppression of productive HIV-1 infection in a T-cell line (Molt-4) by a retro...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2009.02.003
更新日期:2009-04-01 00:00:00
abstract::In experimental Trypanosoma cruzi infections, severe thymic atrophy leads to release of activated CD4(+)CD8(+) double-positive (DP) T cells to the periphery. In humans, activated DP T cells are found in the blood in association with severe cardiac forms of human chronic Chagas disease. The mechanisms underlying the pr...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2013.02.003
更新日期:2013-05-01 00:00:00
abstract::Theiler's murine encephalomyelitis virus (TMEV) infects macrophages and causes demyelinating disease (DD) in certain mouse strains. IL-23 p19/p40 and IFN-beta, which are both expressed by macrophages in response to TMEV, could contribute to or prevent DD. Because TMEV may induce macrophages' cytokines through TLR3 and...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2007.07.001
更新日期:2007-09-01 00:00:00
abstract::Infection with Brucella abortus induces a pro-inflammatory response that drives T cell responses toward a Th1 profile. The mechanism by which this bacterium triggers this response is unknown. Dendritic cells (DC) are crucial mediators at the host-pathogen interface and are potent Th1-inducing antigen-presenting cells....
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2008.07.035
更新日期:2008-10-01 00:00:00
abstract::Immunity induced by Plasmodium vivax infection leads to memory T cell recruitment activated during "relapse" or "re-infection". This study aims to characterise memory T cells in patients with acute or convalescent P. vivax infection. Lymphocytes were collected from patients infected by P. vivax, immune controls and na...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2005.09.003
更新日期:2006-03-01 00:00:00
abstract::Paracoccidioidomycosis is a systemic mycosis endemic to Latin America. The infection is initiated by inhalation of conidia into the lung and may develop as localized or disseminated disease depending on the depression of cellular immunity. In the present study, we observed that intratracheal infection with Paracoccidi...
journal_title:Microbes and infection
pub_type: 杂志文章
doi:10.1016/j.micinf.2016.08.001
更新日期:2016-12-01 00:00:00