16 documents found, page 1 of 2
Alterations in mucosa branched N-glycans lead to dysbiosis and downregulation o...
Rodrigues, Cláudia S.; Gaifem, Joana; Pereira, Márcia S.; Alves, Maria Francisca; Silva, Mariana; Padrão, Nuno; Cavadas, BrunoThe perturbation of the symbiotic relationship between microbes and intestinal immune system contributes to gut inflammation and Inflammatory Bowel Disease (IBD) development. The host mucosa glycans (glycocalyx) creates a major biological interface between gut microorganisms and host immunity that remains ill-defined. Glycans are essential players in IBD immunopathogenesis, even years before disease onset. Howe...
Akkermansia muciniphila and Parabacteroides distasonis synergistically protect ...
Gaifem, Joana; Mendes-Frias, Ana; Wolter, Mathis; Steimle, Alex; Garzón, Maria Jose; Ubeda, Carles; Nobre, Clarisse; González, Abigail; Pinho, Salomé S.The contribution of the gut microbiome to the balance between homeostasis and inflammation is widely known. Nevertheless, the etiology of inflammatory bowel disease, which is known to be influenced by genetics, immune response, and environmental cues, remains unclear. Unlocking novel players involved in the dictation of a protective gut, namely, in the microbiota component, is therefore crucial to develop novel...
Cholesteryl hemiazelate identified in CVD patients causes in vitro and in vivo ...
Domingues, Neuza S.; Gaifem, Joana; Matthiesen, Rune; Saraiva, Diana P.; Bento, Luís; Marques, André R. A.; Soares, Maria I. L.; Sampaio, JulioOxidation of PUFAs in LDLs trapped in the arterial intima plays a critical role in atherosclerosis. Though there have been many studies on the atherogenicity of oxidized derivatives of PUFA-esters of cholesterol, the effects of cholesteryl hemiesters (ChEs), the oxidation end products of these esters, have not been studied. Through lipidomics analyses, we identified and quantified two ChE types in the plasma of...
SARS-CoV-2 Infection Drives a Glycan Switch of Peripheral T Cells at Diagnosis
Alves, Inês; Vicente, Manuel Machado; Gaifem, Joana; Fernandes, Ângela; Dias, Ana Mendes; Rodrigues, Cláudia Sousa; Oliveira, José Carlos; Seixas, NairCOVID-19 is a highly selective disease in which SARS-CoV-2 infection can result in different clinical manifestations ranging from asymptomatic/mild to severe disease that requires hospitalization. In this study, we demonstrated that SARS-CoV-2 infection results in a glycosylation reprogramming of circulating lymphocytes at diagnosis. We identified a specific glycosignature of T cells, defined upon SARS-CoV-2 in...
Mathematical modelling using predictive biomarkers for the outcome of canine Le...
Gonçalves, Rafaela de Sousa; Alves de Pinho, Flaviane; Dinis-Oliveira, Ricardo Jorge; Azevedo, Rui; Gaifem, Joana; Farias Larangeira, DanielaPrediction parameters of possible outcomes of canine leishmaniasis (CanL) therapy might help with therapeutic decisions and animal health care. Here, we aimed to develop a diagnostic method with predictive value by analyzing two groups of dogs with CanL, those that exhibited a decrease in parasite load upon antiparasitic treatment (group: responders) and those that maintained high parasite load despite the trea...
Phagosomal removal of fungal melanin reprograms macrophage metabolism to promot...
Gonçalves, Samuel M.; Duarte-Oliveira, Cláudio; Campos, Cláudia F.; Aimanianda, Vishukumar; ter Horst, Rob; Leite, Luis; Mercier, ToineIn response to infection, macrophages adapt their metabolism rapidly to enhance glycolysis and fuel specialized antimicrobial effector functions. Here we show that fungal melanin is an essential molecule required for the metabolic rewiring of macrophages during infection with the fungal pathogen Aspergillus fumigatus. Using pharmacological and genetic tools, we reveal a molecular link between calcium sequestrat...
Deciphering the microbiome and metabolic factors contributing to protection aga...
Gaifem, JoanaInflammatory bowel disease (IBD) is a complex set of inflammatory disorders from the gastrointestinal tract, comprising Crohn’s disease (CD) and ulcerative colitis (UC). Although the precise etiology of this disease remains unclear, the pathogenesis of IBD has been defined as an immune-mediated condition with a strong genetic predisposition, triggered by environmental factors that affect the mucosal barrier and...
Definition of the anti-inflammatory oligosaccharides derived from the galactosa...
Gressler, Markus; Heddergott, Christoph; N'Go, Inés C.; Renga, Giorgia; Oikonomou, Vasilis; Moretti, Silvia; Coddeville, Bernadette; Gaifem, JoanaGalactosaminogalactan (GAG) is an insoluble aminosugar polymer produced by Aspergillus fumigatus and has anti-inflammatory properties. Here, the minimum glycosidic sequences required for the induction of IL-1Ra by peripheral blood mononuclear cells (PBMCs) was investigated. Using chemical degradation of native GAG to isolate soluble oligomers, we have found that the de-N-acetylation of galactosamine residues an...
L-Threonine Supplementation During Colitis Onset Delays Disease Recovery
Gaifem, Joana; Gonçalves, Luís G.; Dinis-Oliveira, Ricardo J.; Cunha, Cristina; Carvalho, Agostinho; Torrado, EgídioDietary nutrients have emerged as potential therapeutic adjuncts for inflammatory bowel disease (IBD) given their impact on intestinal homeostasis through the modulation of immune response, gut microbiota composition and epithelial barrier stability. Several nutrients have already been associated with a protective phenotype. Yet, there is a lack of knowledge toward the most promising ones as well as the most ad...
The influence of surface modified poly(L-lactic acid) films on the differentiat...
Correia, Clara R.; Gaifem, Joana; Oliveira, Mariana Braga; Silvestre, Ricardo Jorge Leal; Mano, J. F.Macrophages play a crucial role in the biological performance of biomaterials, as key factors in defining the optimal inflammation-healing balance towards tissue regeneration and implant integration. Here, we investigate how different surface modifications performed on poly(L-lactic acid) (PLLA) films would influence the differentiation of human monocytes into macrophages. We tested PLLA films without modificat...