Natalia Muñoz Wolf

Natalia Muñoz Wolf
Trinity College Dublin | TCD · Immunology

PhD in Chemistry

About

28
Publications
6,883
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978
Citations
Additional affiliations
October 2013 - present
Trinity College Dublin
Position
  • Research Associate

Publications

Publications (28)
Article
The dogma that immunological memory is an exclusive trait of adaptive immunity has been recently challenged by studies showing that priming of innate cells can also result in modified long-term responsiveness to secondary stimuli, once the cells have returned to a non-activated state. This phenomenon is known as ‘innate immune memory’, ‘trained imm...
Article
Chitosan is a cationic polysaccharide that has been evaluated as an adjuvant due to its biocompatible and biodegradable nature. The polysaccharide can enhance antibody responses and cell mediated immunity following vaccination by injection or mucosal routes. However, the optimal polymer characteristics for activation of dendritic cells (DCs) and in...
Article
Full-text available
Nutritional immunity is the sequestration of bioavailable trace metals such as iron, zinc and copper by the host to limit pathogenicity by invading microorganisms. As one of the most conserved activities of the innate immune system, limiting the availability of free trace metals by cells of the immune system serves not only to conceal these vital n...
Article
Full-text available
Uncoupling proteins (UCPs) are members of the mitochondrial anion carrier superfamily that can mediate the transfer of protons into the mitochondrial matrix from the intermembrane space. We have previously reported UCP3 expression in thymocytes, mitochondria of total splenocytes and splenic lymphocytes. Here, we demonstrate that Ucp3 is expressed i...
Article
Full-text available
Increased glycolytic metabolism recently emerged as an essential process driving host defense against Mycobacterium tuberculosis (Mtb), but little is known about how this process is regulated during infection. Here, we observe repression of host glycolysis in Mtb-infected macrophages, which is dependent on sustained upregulation of anti-inflammator...
Article
Despite being in the midst of a global pandemic of infections caused by the pathogen Chlamydia trachomatis, a vaccine capable of inducing protective immunity remains elusive. Given the C. trachomatis mucosal port of entry, a formulation compatible with mucosal administration and capable of eliciting potent genital tract immunity is highly desirable...
Article
Assembly of inflammasomes after infection or injury leads to the release of interleukin-1β (IL-1β) and to pyroptosis. After inflammasome activation, cells either pyroptose or enter a hyperactivated state defined by IL-1β secretion without cell death, but what controls these different outcomes is unknown. Here, we show that removal of the Toll-IL-1R...
Article
The cytokine IL-33 is a well-established inducer of Th2 responses. However, roles for IL-33 in promoting CD8, Th1, and T regulatory cell responses have also emerged. In this study, the role of IL-33 as a regulator of particulate vaccine adjuvant-induced Ag-specific cellular immunity was investigated. We found that polymeric nanoparticles surpassed...
Article
Full-text available
Growing awareness of the multiplicity of roles for the IL‐1 family in immune regulation has prompted research exploring these cytokines in the context of vaccine‐induced immunity. While tightly regulated, cytokines of the IL‐1 family are normally released in response to cellular stress and in combination with other danger/damage associated molecula...
Article
Full-text available
The effectiveness of many vaccines licensed for clinical use relates to the induction of neutralising antibodies, facilitated by the inclusion of vaccine adjuvants, particularly alum. However, the ability of alum to preferentially promote humoral rather than cellular, particularly Th1-type responses, is not well understood. We demonstrate that alum...
Chapter
Many adjuvants approved for human use and in clinical development activate multimeric protein scaffolds known as inflammasomes, which promote processing and secretion of the proinflammatory cytokines interleukin (IL)-1β and IL-18. The role of inflammasome-derived cytokines as orchestrators of innate responses is well documented, but their contribut...
Article
The Hippo pathway responds to environmental factors including nutrient availability, cell density and substrate stiffness to regulate organ size. This pathway is now shown to also regulate antiviral defence by modulating the TBK1-mediated control of interferon production.
Article
Signaling through toll-like receptors (TLRs), the main receptors in innate immunity, is essential for the defense of mucosal surfaces. It was previously shown that systemic TLR5 stimulation by bacterial flagellin induces an immediate, transient interleukin-22 (IL-22)-dependent antimicrobial response to bacterial or viral infections of the mucosa. T...
Article
Full-text available
Aim: To evaluate efficacy of sublingual flagellin to treat acute pneumonia. Materials & methods: Mice were treated sublingually with flagellin and challenged intranasally with a lethal dose of pneumococcus. Flagellins lacking TLR5 or NLRC4 activation domains were used to assess their contribution to protection. Results: Sublingual flagellin pr...
Chapter
For many years innate immunity was regarded as a relatively nonspecific set of mechanisms serving as a first line of defence to contain infections while the more refined adaptive immune response was developing. The discovery of pattern recognition receptors (PRRs) revolutionised the prevailing view of innate immunity, revealing its intimate connect...
Article
The cationic polysaccharide chitosan is an attractive candidate adjuvant capable of driving potent cell-mediated immunity, but the mechanism by which it acts is not clear. We show that chitosan promotes dendritic cell maturation by inducing type I interferons (IFNs) and enhances antigen-specific T helper 1 (Th1) responses in a type I IFN receptor-d...
Article
Full-text available
Humans that are heterozygous for the common S180L polymorphism in the Toll-like receptor (TLR) adaptor Mal (encoded by TIRAP) are protected from a number of infectious diseases, including tuberculosis (TB), whereas those homozygous for the allele are at increased risk. The reason for this difference in susceptibility is not clear. We report that Ma...
Article
Full-text available
Prophylactic intranasal administration of toll-like receptor 5 (TLR5) agonist flagellin protects mice against respiratory pathogenic bacteria. We hypothesized that TLR5-mediated stimulation of lung immunity might improve the therapeutic index of antibiotics in the treatment of Streptococcus pneumoniae respiratory infections in mice. Intranasal admi...
Article
Full-text available
Sublingual route has been widely used to deliver small molecules into the bloodstream and to modulate the immune response at different sites. It has been shown to effectively induce humoral and cellular responses at systemic and mucosal sites, namely the lungs and urogenital tract. Sublingual vaccination can promote protection against infections at...
Article
Despite the efficacy of current immune-chemotherapy for treatment of B-cell non-Hodgkin lymphoma, substantial proportion of patients relapse, highlighting the need for new therapeutic modalities.The use of live micro-organisms to develop anti-tumoral therapies has evolved since Coley′s toxin and is now receiving renewed attention. Salmonella Typhim...
Article
Full-text available
Nonunion bone defects occur frequently with local pain, functional limitations, muscular atrophy, and fistulas due to osteomyelitis. The application of mesenchymal stem cells (MSCs) could improve regeneration of bone following bone defects. The objective of the present study was to evaluate the treatment of a nonunion defect due to chronic osteomye...
Article
Full-text available
Exogenous activation of pulmonary invariant natural killer T (iNKT) cells, a population of lipid-reactive αβ T lymphocytes, with use of mucosal α-galactosylceramide (α-GalCer) administration, is a promising approach to control respiratory bacterial infections. We undertook the present study to characterize mechanisms leading to α-GalCer-mediated pr...
Article
Full-text available
Infection by larval Echinococcus granulosus is usually characterized by tight inflammatory control. However, various degrees of chronic granulomatous inflammation are also observed, reaching a high point in infection of cattle by the most prevalent parasite strain worldwide, which is not well adapted to this host species. In this context, epithelio...
Article
Acute pneumonia caused by Streptococcus pneumoniae is a major cause of child mortality. Antibodies are considered the main effectors of protection in this clinical presentation of pneumococcal invasive disease. To get new insights into the mechanisms involved in the protective immunity, we established a murine experimental model of protection again...
Article
Full-text available
Streptococcus pneumoniae is a major cause of pneumonia in infants and the elderly. Innate defenses are essential to the control of pneumococcal infections, and deficient responses can trigger disease in susceptible individuals. Here we showed that flagellin can locally activate innate immunity and thereby increase the resistance to acute pneumonia....

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