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 downregulation of gp63 renders this parasite sensitive to complement-mediated lysis and less infective to mice, as indicated by a delay in lesion development and a significant reduction in lesion size and parasite loads at the site of inoculation and in the draining lymph nodes (DLNs). CD4+ cells at the site of inoculation decreased in number more rapidly and were 2-fold less numerous than those in controls by week 4. The number of IFN-gamma-positive cells was higher, while IL-10 positive cells were undetectable. In DLNs, CD4+ cells were higher in number, and the profile of cytokine-positive cells followed essentially the same patterns--found at the site of inoculation. These results suggest that the downregulation of gp63 increases extracellular lysis of the mutants by complement, in the in vivo environment, and reduces their infection of macrophages, resulting in a type 1 immune response seen at the site of inoculation and DLNs.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Thiakaki M,Kolli B,Chang KP,Soteriadou Kdoi
10.1016/j.micinf.2006.01.006subject
Has Abstractpub_date
2006-05-01 00:00:00pages
1455-63issue
6eissn
1286-4579issn
1769-714Xpii
S1286-4579(06)00074-8journal_volume
8pub_type
杂志文章abstract：:Flaviviruses enter their host cells by receptor-mediated endocytosis, a well-orchestrated process of receptor recognition, penetration and uncoating. Recent findings on these early steps in the life cycle of flaviviruses are the focus of this review. ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2010.09.005
更新日期：2011-01-01 00:00:00
abstract：:CCR5-tropic (R5) immunodeficiency virus type 1 (HIV-1) strains are highly transmissible during the early stage of infection in humans, whereas CXCR4-tropic (X4) strains are less transmissible. This study aimed to explore the basis for early phase R5 and X4 HIV-1 infection in vivo by using humanized mice dually challen...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.02.002
更新日期：2015-05-01 00:00:00
abstract：:The Escherichia coli NleH1 and NleH2 virulence proteins differentially regulate host transcription of innate immunity genes. The mouse pathogen Citrobacter rodentium encodes one NleH protein, which functions equivalently to E. coli NleH1. We examined the impact of host genetics and intestinal inflammation on the contr...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.02.003
更新日期：2014-05-01 00:00:00
abstract：:Lactobacilli are normal inhabitants of our microbiota and are known to protect against pathogens. Neisseria gonorrhoeae is a human specific pathogenic bacterium that colonises the urogenital tract where it causes gonorrhoea. In this study we analysed early interactions between lactobacilli and gonococci and investigat...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.07.032
更新日期：2008-10-01 00:00:00
abstract：:In this review, we give a summary of recent examples of hybridisation in fungi. Reports on hybridisation between pathogenic fungi infecting plants have increased during the last decade. Hybrids of plant pathogens may create devastating new diseases on both cultivated and wild plants; at the same time, hybridisation is...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(02)00005-9
更新日期：2002-11-01 00:00:00
abstract：:In developed countries, enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a leading cause of bloody diarrhea and renal failures in human. Understanding strategies employed by EHEC to colonize the intestine is of major importance since to date no cure exists to eradicate the pathogen. In this study, the adaptive res...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.09.008
更新日期：2015-01-01 00:00:00
abstract：:Helicobacter hepaticus strain 3B1 (H. hepaticus) contains a genomic island of approximately 71 kb, HHGI1, with some of the common features shared among known bacterial pathogenicity islands. In this study, we characterized the pathogenic potential of HHGI1 by infecting B6.129-IL10 tm1Cgn (IL10-/-) mice with an isogeni...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.03.011
更新日期：2008-06-01 00:00:00
abstract：:We investigated the roles of the regulatory molecules glucocorticoid-induced TNF receptor family-related protein (GITR) and cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) in murine infection with the nematode parasite Trichinella spiralis. Expression of GITR and CTLA-4 was rapidly upregulated on cells in the mes...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.08.013
更新日期：2006-10-01 00:00:00
abstract：:The early interferon-gamma (IFN-gamma) response after Salmonella infection was compared in resistant and susceptible congenic mice strains differing by the allele of Nramp1. IFN-gamma gene expression in vivo was studied by quantitative reverse transcription-PCR performed from the spleen of mice challenged by Salmonell...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(01)01419-8
更新日期：2001-07-01 00:00:00
abstract：:The intestine is inhabited by a diverse range of microorganisms, which requires the host to employ numerous barrier measures to prevent bacterial invasion. However, the intestinal microbiota additionally acts symbiotically with host cells to maintain epithelial barrier function, and perturbation to this interaction pl...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2020.10.009
更新日期：2020-11-12 00:00:00
abstract：:Amoebiasis is responsible for 50000-100000 deaths annually. Invasive amoebic disease begins with the attachment of Entamoeba histolytica trophozoites to colonic mucin, a process mediated by the amoebic Gal/GalNAc lectin. The non-pathogenic counterpart, E. dispar, is morphologically identical but genetically distinct. ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01330-7
更新日期：2000-11-01 00:00:00
abstract：:Japanese encephalitis virus (JEV) is an arbovirus belonging to the family Flaviviridae. It is maintained in a zoonotic cycle involving pigs, ardeid birds and Culex species of mosquitoes. Humans are accidental/dead end hosts of JEV infection because they cannot sustain high viral titers. Factors affecting the clinical ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2011.01.002
更新日期：2011-04-01 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：:We previously showed the possibility that Gag A146P, which is an escape mutant from HLA-B∗57-restricted CTLs, was selected by HLA-B∗48:01-restricted Gag138-147(LI10)-specific CTLs in a Japanese cohort in which HLA-B∗57 individuals were not detected. We herein demonstrated Gag140-147(GI8) to be the optimal epitope rath...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.03.009
更新日期：2011-08-01 00:00:00
abstract：:A non-toxigenic tox gene-bearing (NTTB) Corynebacterium ulcerans was grown from the wound of a 61-year-old gardener and in a nasal specimen from the patient's asymptomatic dog. The two isolates were similar in terms of antibiogram, multilocus sequence typing (ST341), virulence genes, and only three SNPs were found to ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2015.07.004
更新日期：2015-10-01 00:00:00
abstract：:About the relationship between retroviral genome packaging and translation, three possible modes (random-, trans-, and cis-) of packaging process could be assumed. In this report, we developed an assay system based on the RT-qPCR to measure the packaging efficiency of primate lentiviruses. With this system, we analyze...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2018.09.002
更新日期：2019-03-01 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：:Patients with paracoccidioidomycosis (PCM) present marked involvement of the lungs during the course of the mycosis. The purpose of this work was to obtain bronchoalveolar lavage (BAL) fluid from these patients to study the cytopathology, TNF levels and the oxidative and fungicidal response of alveolar macrophages (AM...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2003.05.001
更新日期：2003-12-01 00:00:00
abstract：:This study examined the impact of concurrent parasite infections (amoebiasis, filariasis, necatoriasis) and the effect of anti-parasite treatment on cytokine and chemokine responses in singly and poly-parasitized patients. Cellular reactivity and parasite-specific Th1- and Th2-type cytokine and chemokine profiles were...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.06.019
更新日期：2006-01-01 00:00:00
abstract：:Secreted phospholipase B (PLB1), which contains three enzyme activities in the one protein, is necessary for the initiation of pulmonary infection by Cryptococcus neoformans and for dissemination from the lung via the lymphatics and blood. Adhesion to lung epithelium is the first step in this process, therefore we inv...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.10.018
更新日期：2006-04-01 00:00:00
abstract：:Trypanosoma cruzi the cause of Chagas disease persists in tissues of infected experimental animals and humans. Here we demonstrate the persistence of the parasite in adipose tissue from of three of 10 elderly seropositive patients with chronic chagasic heart disease. Nine control patients had no parasites in the fat. ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.06.002
更新日期：2011-11-01 00:00:00
abstract：:Enterovirus 71 (EV71) is a neurotropic pathogen that can cause severe neural diseases and complications on infected patients. Clinical observations showed that EV71-induced immune responses may be associated with virus induced neurogenic pulmonary edema. Here reviewed studies that discovered several host molecules as ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2010.03.006
更新日期：2010-07-01 00:00:00
abstract：:Infection with Trypanosoma cruzi, the etiologic agent in Chagas disease, may result in heart disease. Over the last decades, Chagas disease endemic areas in Latin America have seen a dietary transition from the traditional regional diet to a Western style, fat rich diet. Previously, we demonstrated that during acute i...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2018.07.001
更新日期：2019-01-01 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：:Two-component regulatory systems play an important role in bacterial virulence. We report that mutation of a Pseudomonas aeruginosa gene designated retS (previously designated fimK; accession number PA4856) encoding a putative hybrid two-component regulator, attenuates multiple virulence mechanisms. The retS mutant wa...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.04.017
更新日期：2005-10-01 00:00:00
abstract：:This article explores one of a citation classics in medical literature-Koch's postulates. It analyses their creation in the nineteenth century and their popularity in the twentieth century. As a genre of historiography, references to the postulates are anecdotes. In referring to a historical event that never happened,...
journal_title：Microbes and infection
pub_type： 历史文章,杂志文章,评审
doi：10.1016/j.micinf.2014.08.012
更新日期：2014-11-01 00:00:00
abstract：:The mechanisms and molecular effectors of pathogen recognition systems in diverse hosts are highly conserved. Both plant and animal recognition of pathogens relies on sensing of Pathogen-Associated Molecular Patterns (PAMPs) by Pattern Recognition Molecules (PRMs). To detect bacteria, these sensor molecules can recogn...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2009.03.004
更新日期：2009-05-01 00:00:00
abstract：:The 3'-5'-cyclic guanosine monophosphate (cGMP)-dependent protein kinase (PKG) is the main mediator of cGMP signalling in the malaria parasite. This article reviews the role of PKG in Plasmodium falciparum during gametogenesis and blood stage schizont rupture, as well as the role of the Plasmodium berghei orthologue i...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2012.04.011
更新日期：2012-08-01 00:00:00
abstract：:Previously, we established HEp2 cell lines which express the US3 protein kinase of herpes simplex virus type 2 upon induction with IPTG. Using these cells, we examined whether expression of US3 is sufficient to protect cells from apoptotic cell death induced by sorbitol. Cells expressing US3 showed significantly reduc...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(02)01590-3
更新日期：2002-06-01 00:00:00
abstract：:A psittacosis epidemic linked to fulmar hunting occurred on the Faroe Islands in the 1930s. This study investigates a plausible explanation to the 20% human mortality in this outbreak. Phylogenetic analysis showed that Chlamydia psittaci isolated from fulmars were closely related to the highly virulent 6BC strains fro...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2020.02.007
更新日期：2020-09-01 00:00:00
