229 research outputs found

    BANCASSURANCE – MAIN INSURANCE DISTRIBUTION AND SALE CHANNEL IN EUROPE

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    Before the emergence of the crisis, banks’ incomes were preponderantly oriented towards the lending activity, which activity is unsustainable in these circumstances. With the financial crisis, banks have diversified revenues and identified the benefits of sustainable partnerships with insurance institutions (the bancassurance), achieving convergence towards common platforms. The driving factor of the bancassurance system must also be sought in the common need of banks and insurance companies to optimize the structure and efficiency of the distribution channels. Thus, if credit institutions seek to obtain additional revenue by capitalizing the potential of regional networks, initially configured based on own marketing policies, insurance companies are interested in diversifying without significant capital investment, the traditional distribution methods, so that the products and services offered have access to a large number of potential customer

    Permissive and Restricted Virus Infection of Murine Embryonic Stem Cells

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    Recent RNA interference (RNAi) studies have identified many host proteins that modulate virus infection, but small interfering RNA 'off-target' effects and the use of transformed cell lines limit their conclusiveness. As murine embryonic stem (mES) cells can be genetically modified and resources exist where many and eventually all known mouse genes are insertionally inactivated, it was reasoned that mES cells would provide a useful alternative to RNAi screens. Beyond allowing investigation of host-pathogen interactions in vitro, mES cells have the potential to differentiate into other primary cell types, as well as being used to generate knockout mice for in vivo studies. However, mES cells are poorly characterized for virus infection. To investigate whether ES cells can be used to explore host-virus interactions, this study characterized the responses of mES cells following infection by herpes simplex virus type 1 (HSV-1) and influenza A virus. HSV-1 replicated lytically in mES cells, although mES cells were less permissive than most other cell types tested. Influenza virus was able to enter mES cells and express some viral proteins, but the replication cycle was incomplete and no infectious virus was produced. Knockdown of the host protein AHCYL1 in mES cells reduced HSV-1 replication, showing the potential for using mES cells to study host-virus interactions. Transcriptional profiling, however, indicated the lack of an efficient innate immune response in these cells. mES cells may thus be useful to identify host proteins that play a role in virus replication, but they are not suitable to determine factors that are involved in innate host defence

    Asymptomatic CMV infections in long-term renal transplant recipients are associated with the loss of FcRγ from LIR-1+ NK cells

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    While it is established that cytomegalovirus (CMV) disease affects NK-cell profiles, the functional consequences of asymptomatic CMV replication are unclear. Here, we characterize NK cells in clinically stable renal transplant recipients (RTRs; n = 48) >2 years after transplantation. RTRs and age-matched controls (n = 32) were stratified by their CMV serostatus and the presence of measurable CMV DNA. CMV antibody or CMV DNA influenced expression of NKG2C, LIR-1, NKp30, NKp46, and FcRγ, a signaling adaptor molecule, on CD56dim NK cells. Phenotypic changes ascribed to CMV were clearer in RTRs than in control subjects and affected NK-cell function as assessed by TNF-α and CD107a expression. The most active NK cells were FcRγ–LIR-1+NKG2C– and displayed high antibody-dependent cell cytotoxicity responses in the presence of immobilized CMV glycoprotein B reactive antibody. However, perforin levels in supernatants from RTRs with active CMV replication were low. Overall we demonstrate that CMV can be reactivated in symptom-free renal transplant recipients, affecting the phenotypic, and functional profiles of NK cells. Continuous exposure to CMV may maintain and expand NK cells that lack FcRγ but express LIR-1

    The Role of Nitric Oxide in Mycobacterial Infections

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    Although tuberculosis poses a significant health threat to the global population, it is a challenge to develop new and effective therapeutic strategies. Nitric oxide (NO) and inducible NO synthase (iNOS) are important in innate immune responses to various intracellular bacterial infections, including mycobacterial infections. It is generally recognized that reactive nitrogen intermediates play an effective role in host defense mechanisms against tuberculosis. In a murine model of tuberculosis, NO plays a crucial role in antimycobacterial activity; however, it is controversial whether NO is critically involved in host defense against Mycobacterium tuberculosis in humans. Here, we review the roles of NO in host defense against murine and human tuberculosis. We also discuss the specific roles of NO in the central nervous system and lung epithelial cells during mycobacterial infection. A greater understanding of these defense mechanisms in human tuberculosis will aid in the development of new strategies for the treatment of disease

    Human cytomegalovirus elicits fetal γδ T cell responses in utero

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    The fetus and infant are highly susceptible to viral infections. Several viruses, including human cytomegalovirus (CMV), cause more severe disease in early life compared with later life. It is generally accepted that this is a result of the immaturity of the immune system. γδ T cells are unconventional T cells that can react rapidly upon activation and show major histocompatibility complex–unrestricted activity. We show that upon CMV infection in utero, fetal γδ T cells expand and become differentiated. The expansion was restricted to Vγ9-negative γδ T cells, irrespective of their Vδ chain expression. Differentiated γδ T cells expressed high levels of IFN-γ, transcription factors T-bet and eomes, natural killer receptors, and cytotoxic mediators. CMV infection induced a striking enrichment of a public Vγ8Vδ1-TCR, containing the germline-encoded complementary-determining-region-3 (CDR3) δ1–CALGELGDDKLIF/CDR3γ8–CATWDTTGWFKIF. Public Vγ8Vδ1-TCR–expressing cell clones produced IFN-γ upon coincubation with CMV-infected target cells in a TCR/CD3-dependent manner and showed antiviral activity. Differentiated γδ T cells and public Vγ8Vδ1-TCR were detected as early as after 21 wk of gestation. Our results indicate that functional fetal γδ T cell responses can be generated during development in utero and suggest that this T cell subset could participate in antiviral defense in early life

    A Herpesvirus Encoded Deubiquitinase Is a Novel Neuroinvasive Determinant

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    The neuroinvasive property of several alpha-herpesviruses underlies an uncommon infectious process that includes the establishment of life-long latent infections in sensory neurons of the peripheral nervous system. Several herpesvirus proteins are required for replication and dissemination within the nervous system, indicating that exploiting the nervous system as a niche for productive infection requires a specialized set of functions encoded by the virus. Whether initial entry into the nervous system from peripheral tissues also requires specialized viral functions is not known. Here we show that a conserved deubiquitinase domain embedded within a pseudorabies virus structural protein, pUL36, is essential for initial neural invasion, but is subsequently dispensable for transmission within and between neurons of the mammalian nervous system. These findings indicate that the deubiquitinase contributes to neurovirulence by participating in a previously unrecognized initial step in neuroinvasion

    The impact of World War I on the family in Transylvania

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    The impact of World War I on the family in Transylvania. - In: Families in Europe between the 19th and the 21st centuries : from the traditional model to contemporary PACS : papers of the international conference, Cluj-Napoca, October 8th-11th 2009, p. 611-628. Biobliogr

    Demographic phenomena and behaviour in Transylvania during World War I

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    Demographic phenomena and behaviour in Transylvania during World War I. - In: Romanian journal of population studies, an 2007, vol. 1, nr. 1-2, p. 164-180. Bibliog

    Contributions regarding Transylvania’s ethnic and religious structure in the 20th century

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    Contributions regarding Transylvania's ethnic and religious structure in the 20th century. - In: Transylvanian review, an 1994, vol. III, nr. 3, p. 80-96

    From tradition to modernisation : the Romanian family in Transylvania in the Modern Era (1850-1918)

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    From tradition to modernisation : the Romanian family in Transylvania in the Modern Era (1850-1918). - In: Transylvanian review, an 2009, vol. XVIII, nr. Supplement 1, p. 147-158
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