Abstract：
:Most pandemic influenza virus strains undergo adaptation or reassortment before they acquire the ability to cause fatal infections in a new host species. The pathologic changes and tissue tropism during virus adaptation are not fully understood. Here we investigated pathologic changes and tissue tropism by serial lung-to-lung passaging of human influenza virus strain A/Aichi/2/68 (H3N2) in a BALB/c mouse model. Enhanced pulmonary lesions and systemic virus infection were observed during adaptation. Late passage 10 (P10) virus caused extra-pulmonary spread with necrotic and inflammatory lesions in the brain, heart, spleen and intestine of infected animals, in contrast to infection with earlier passage viruses which were restricted to lungs. Non-conservative mutations in the hemagglutinin (Gly218Glu) and non-structural 1 (Asp125Gly) proteins were identified in P10 virus which exhibited high virulence. Virus growth kinetics showed enhanced replication ability of P10 virus in different cell lines. P10 virus also exhibited the ability to bind to erythrocytes of different host species. These results demonstrate extra-pulmonary spread of influenza virus during adaptation with enhanced replication ability in a new host. This mouse adaptation model may provide a basis for understanding cross-species adaptability corresponding to increased virulence of the influenza A virus, a phenomenon of relevance to the emergence of future highly pathogenic strains.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Narasaraju T,Sim MK,Ng HH,Phoon MC,Shanker N,Lal SK,Chow VTdoi
10.1016/j.micinf.2008.09.013subject
Has Abstractpub_date
2009-01-01 00:00:00pages
2-11issue
1eissn
1286-4579issn
1769-714Xpii
S1286-4579(08)00280-3journal_volume
11pub_type
杂志文章abstract：:Two strains of mice selected according to extreme phenotypes of susceptibility and resistance to oral tolerance (TS and TR mice, respectively) were infected with 1 x 10(7) Leishmania amazonensis promastigotes and studied comparatively. TS mice developed a minor pathology while permitting parasite growth with the prese...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.09.018
更新日期：2006-04-01 00:00:00
abstract：:Grain feeding seems to promote the growth and acid resistance of Escherichia coli in fattening beef cattle, and acid-resistant E. coli are more likely to survive the human gastric stomach. When cattle were fed hay for only five days, the number and acid resistance of E. coli decreased dramatically. ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)00286-0
更新日期：2000-01-01 00:00:00
abstract：:Human histocompatibility leukocyte antigen (HLA)-G is an antigen-presenting molecule. This review discusses the possibility that this might not be its primary function. HLA-G indeed modulates innate immunity by interacting with immunoglobulin-like receptors and by regulating HLA-E expression and its subsequent interac...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(01)01386-7
更新日期：2001-04-01 00:00:00
abstract：:Humans and animals are colonized by members of the genus Staphylococcus, however only some of these species evolved to cause invasive disease. The genetic basis for conversion of commensal staphylococci into pathogens is not known. We hypothesized that Staphylococcus aureus genes for coagulation and agglutination in v...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2016.12.002
更新日期：2017-02-01 00:00:00
abstract：:Evaluation of vector control is crucial for improving malaria containment and, according to World Health Organization, new complementary indicators would be very valuable. In this study the IgG response to the Anopheles-specific cE5 salivary protein was tested as a tool to evaluate the efficacy of insecticide-treated ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.01.002
更新日期：2015-06-01 00:00:00
abstract：:The immune response, both in innate and adaptive immunity, is controlled at several levels, including signaling from the central nervous system. Neuropeptides released within the lymphoid organs modulate the immune response, either as stimulators or inhibitors. The subject of this review is the description of macropha...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01361-7
更新日期：2001-02-01 00:00:00
abstract：:Orientia tsutsugamushi, an obligate intracellular bacterium, was isolated for the first time in 1930. Infections by virulent strains are characterized by fever, rash, eschar, pneumonia, myocarditis, and disseminated intravascular coagulation. Here we review the general aspects of O. tsutsugamushi and immune responses ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01352-6
更新日期：2001-01-01 00:00:00
abstract：:Coxiella burnetii is an intracellular bacterium that causes acute and chronic Q fever. This unique pathogen has been historically challenging to study due to obstacles in genetically manipulating the organism and the inability of small animal models to fully mimic human Q fever. Here, we review the current state of C....
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2019.09.001
更新日期：2020-04-01 00:00:00
abstract：:In vitro cell culture models used to study how Salmonella initiates disease at the intestinal epithelium would benefit from the recognition that organs and tissues function in a three-dimensional (3-D) environment and that this spatial context is necessary for development of cultures that more realistically resemble i...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.02.020
更新日期：2006-06-01 00:00:00
abstract：:The treatment of HEp-2 cells with sorbitol induced massive apoptosis rapidly. This method for inducing apoptosis is very useful to detect antiapoptotic activity of viruses as well as viral genes. Commitment to death occurred immediately upon incubation with sorbitol, even in the presence of pancaspase inhibitor, Z-VAD...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(00)00366-x
更新日期：2000-05-01 00:00:00
abstract：:Streptococcus pneumoniae is a major pathogen causing potentially life-threatening community-acquired diseases in both the developed and developing world. Since 1967, there has been a dramatic increase in the incidence of penicillin-resistant and multiply antibiotic-resistant pneumococci worldwide. Prevention of access...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01345-9
更新日期：2000-12-01 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：:Shigella and Salmonella kill host cells and trigger inflammatory responses by mechanisms that are not fully understood. The goal of this review is to reevaluate key observations reported over the past 15 years and, whenever possible, to provide a chronological perspective as to how our understanding of the pathways by...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2005.08.002
更新日期：2006-02-01 00:00:00
abstract：:We have previously reported that mice immunized with the mycobacterial 27-kDa lipoprotein were more susceptible to Mycobacterium tuberculosis (Mtb) challenge. We also showed that 27-kDa lipoprotein abrogated the protection afforded by the BCG vaccine when administrated together, suggesting that the 27-kDa lipoprotein ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.02.011
更新日期：2006-06-01 00:00:00
abstract：:The virulence of Paracoccidioides brasiliensis can be attenuated or lost after long periods of repeated subculturing and reestablished after animal inoculation. Only one adhesin (gp43) has been described until now, among the various identified components of P. brasiliensis, and gp43 shows adhesion to laminin. Thus, th...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.02.005
更新日期：2005-05-01 00:00:00
abstract：:Parachlamydia acanthamoebae is an obligate intracellular bacterium naturally infecting free-living amoebae. The role of this bacterium as an agent of pneumonia is suggested by sero-epidemiological studies and molecular surveys. Furthermore, P. acanthamoebae may escape macrophages microbicidal effectors. Recently, we d...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.08.007
更新日期：2015-11-01 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：:This review considers whether the products of schistosomes in the mammalian host can be considered as virulence factors. These include: the cercarial secretions used in infection, those of the migrating schistosomulum, surface-exposed proteins of adult worms in the portal system and their gut vomitus in the context of...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2012.09.001
更新日期：2012-12-01 00:00:00
abstract：:Toxin B, an exotoxin produced by the anaerobic Gram-positive bacteria Clostridium difficile, is responsible for pseudomembranous colitis in humans. It deeply modifies morphology of cultured cells and enhances their membrane surface area, which suggests a possible alteration of membrane receptor distribution. Since tox...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(99)00247-6
更新日期：1999-12-01 00:00:00
abstract：:The occurrence of Bacillus thuringiensis bacteremia in a neutropenic patient suffering from severe pulmonary disease addressed the question of whether the aggressive behavior of B. thuringiensis depended on the host status and/or on the membrane-damaging toxins the isolate produced. After intratracheal injection, BALB...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2007.02.001
更新日期：2007-04-01 00:00:00
abstract：:Our previous study demonstrated the anti-apoptosis function of the human immunodeficiency virus type 1 (HIV-1) vpu gene product in normal CD4+ T lymphocytes. In this study, using sequences obtained from the HIV sequence database, we compared vpu sequences from 184 preparations of various subtypes of HIV-1 from diverse...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2004.09.017
更新日期：2005-02-01 00:00:00
abstract：:Episomal expression of the major surface glycoprotein (gp63) sense and antisense mRNAs in Leishmania amazonensis was found previously to modulate the expression of this molecule as well as its infection of macrophages in vitro. Here, we evaluated the in vivo infectivity of these transfectants in BALB/c mice. Antisense...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.01.006
更新日期：2006-05-01 00:00:00
abstract：:Cell-mediated immunity, leading to Mycobacterium tuberculosis (Mtb)-constraining granuloma formation, is the major component of host defense against tuberculosis and is regulated by the balance of cytokines secreted mostly by mononuclear phagocytes and lymphocytes. To better understand the role of monocytes in the reg...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2003.10.007
更新日期：2004-01-01 00:00:00
abstract：:Lipoarabinomannans (LAMs) from mycobacteria were investigated concerning their effect on human neutrophils. Two types of LAM, the mannose-capped ManLAM from the virulent Mycobacterium tuberculosis H37Rv and the mannose-lacking AraLAM from a rapidly growing mycobacterial strain were used. Neither AraLAM nor ManLAM indu...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(01)01470-8
更新日期：2001-11-01 00:00:00
abstract：:Francisella tularensis causes the zoonosis tularemia in humans, and inhaled F. tularensis ssp. novicida induces lethal murine tularemia. Transcription of virulence factors in F. novicida is regulated by macrophage growth locus A (mglA), a global regulator required for bacterial replication in macrophages in vitro. We ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.04.008
更新日期：2008-06-01 00:00:00
abstract：:Several observations suggest that inhibition of the host complement alternative pathway by Ixodes tick saliva is crucial to achieve blood feeding. We recently described two paralogous anti-complement proteins called Ixodes ricinus anti-complement (IRAC) proteins I and II co-expressed in I. ricinus salivary glands. Phy...
journal_title：Microbes and infection
pub_type： 信件
doi：10.1016/j.micinf.2006.10.020
更新日期：2007-02-01 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：:The strategies that allow Brucella abortus to persist for years inside macrophages subverting host immune responses are not completely understood. Immunity against this bacterium relies on the capacity of IFN-γ to activate macrophages, endowing them with the ability to destroy intracellular bacteria. We report here th...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2010.10.020
更新日期：2011-03-01 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：:Many viruses regulate a crucial point in the apoptotic pathway by expressing viral Bcl-2 homologues, which have become useful tools to investigate the mechanisms behind the control of the mitochondrial checkpoint of apoptosis. Concurrently, a number of viral inhibitors of innate immune signalling have been instrumenta...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2009.08.012
更新日期：2009-11-01 00:00:00
