Transgenerational Diapause as an Avoidance Strategy against Bacterial Pathogens in Caenorhabditis elegans

…, C Gabaldon, B Pollak, J Ortíz-Severín, MA Varas… - MBio, 2017 - Am Soc Microbiol
The dynamic response of organisms exposed to environmental pathogens determines their
survival or demise, and the outcome of this interaction depends on the host’s susceptibility …

[HTML][HTML] Dysregulated immune responses in COVID-19 patients correlating with disease severity and invasive oxygen requirements

…, C Bastias, R Tordecilla, MA Varas… - Frontiers in …, 2021 - frontiersin.org
The prognosis of severe COVID-19 patients has motivated research communities to uncover
mechanisms of SARS-CoV-2 pathogenesis also on a regional level. In this work, we aimed …

The highly diverse Antarctic Peninsula soil microbiota as a source of novel resistance genes

AE Marcoleta, P Arros, MA Varas, J Costa… - Science of the Total …, 2022 - Elsevier
The rise of multiresistant bacterial pathogens is currently one of the most critical threats to
global health, encouraging a better understanding of the evolution and spread of antimicrobial …

[HTML][HTML] Exploiting zebrafish xenografts for testing the in vivo antitumorigenic activity of microcin E492 against human colorectal cancer cells

MA Varas, C Muñoz-Montecinos, V Kallens… - Frontiers in …, 2020 - frontiersin.org
One of the approaches to address cancer treatment is to develop new drugs not only to obtain
compounds with less side effects, but also to have a broader set of alternatives to tackle …

[HTML][HTML] Relevant genes linked to virulence are required for Salmonella Typhimurium to survive intracellularly in the social amoeba Dictyostelium discoideum

S Riquelme, M Varas, C Valenzuela, P Velozo… - Frontiers in …, 2016 - frontiersin.org
The social amoeba Dictyostelium discoideum has proven to be a useful model for studying
relevant aspects of the host-pathogen interaction. In this work, D. discoideum was used as a …

[HTML][HTML] In vivo Host-Pathogen Interaction as Revealed by Global Proteomic Profiling of Zebrafish Larvae

F Díaz-Pascual, J Ortíz-Severín, MA Varas… - Frontiers in Cellular …, 2017 - frontiersin.org
The outcome of a host-pathogen interaction is determined by the conditions of the host, the
pathogen, and the environment. Although numerous proteomic studies of in vitro-grown …

[HTML][HTML] Evaluating Different Virulence Traits of Klebsiella pneumoniae Using Dictyostelium discoideum and Zebrafish Larvae as Host Models

AE Marcoleta, MA Varas, J Ortiz-Severín… - Frontiers in Cellular …, 2018 - frontiersin.org
Multiresistant and invasive hypervirulent Klebsiella pneumoniae strains have become one
of the most urgent bacterial pathogen threats. Recent analyses revealed a high genomic …

[HTML][HTML] Multiple antibiotic susceptibility of polyphosphate kinase mutants (ppk1 and ppk2) from Pseudomonas aeruginosa PAO1 as revealed by global phenotypic …

J Ortiz-Severín, M Varas, C Bravo-Toncio, N Guiliani… - Biological Research, 2015 - Springer
Background Pseudomonas aeruginosa is known to be a multidrug resistant opportunistic
pathogen. Particularly, P. aeruginosa PAO1 polyphosphate kinase mutant (ppk1) is deficient in …

Dictyostelium discoideum as a surrogate host–microbe model for antivirulence screening in Pseudomonas aeruginosa PAO1

…, JA Álvarez, F Campos, J Ortíz-Severín, M Varas… - International journal of …, 2016 - Elsevier
The interest of the pharmaceutical industry in developing new antibiotics is decreasing, as
established screening systems which identify compounds that kill or inhibit the growth of …

[HTML][HTML] Inorganic Polyphosphate Is Essential for Salmonella Typhimurium Virulence and Survival in Dictyostelium discoideum

MA Varas, S Riquelme-Barrios… - Frontiers in cellular …, 2018 - frontiersin.org
Inorganic polyphosphate (polyP) deficiency in enteric bacterial pathogens reduces their ability
to invade and establish systemic infections in different hosts. For instance, inactivation of …