5 documents found, page 1 of 1
Chitosan nanoparticles for enhanced immune response and delivery of multi-epito...
Amaral, Rita; Concha, Tomás; Vítor, Jorge; Almeida, António J.; Calado, Cecília; Diogo Gonçalves, Lídia MariaHelicobacter pylori is the leading cause of chronic gastritis, peptic ulcer, gastric adenocarcinoma, and mucosal-associated lymphoma. Due to the emerging problems with antibiotic treatment against H. pylori in clinical practice, H. pylori vaccination has gained more interest. Oral immunization is considered a promising approach for preventing initial colonization of this bacterium in the gastrointestinal tract,...
A prime-boost immunization strategy with vaccinia virus expressing novel gp120 ...
Calado, Rita; Duarte, Joana; Borrego, Pedro; Marcelino, José Maria; Bártolo, Inês; Martin, Francisco; Figueiredo, Inês; Almeida, Silvia; Luís, GraçaDevelopment of new immunogens eliciting broadly neutralizing antibodies (bNAbs) is a main priority for the HIV-1 vaccine field. Envelope glycoproteins from non-B-non-C HIV-1clades have not been fully explored as components of a vaccine. We produced Vaccinia viruses expressing a truncated version of gp120 (gp120t) from HIV-1 clades CRF02_AG, H, J, B, and C and examined their immunogenicity in mice and rabbits. M...
Proteome variability among Helicobacter pylori isolates clustered according to ...
Vitoriano, Inês; Vítor, Jorge; Oleastro, Mónica; Roxo-Rosa, Mónica; Vale, FilipaAims: To understand whether the variability found in the proteome of Helicobacter pylori relates to the genomic methylation, virulence and associated gastric disease. Methods and Results: We applied the Minimum-Common-Restriction- Modification (MCRM) algorithm to genomic methylation data of 30 Portuguese H. pylori strains, obtained by genome sensitivity to Type II restriction enzymes’ digestion. All the generat...
Screening of Prophage Sequences Among Helicobacter Pylori
Timóteo, Andreia; Breurec, S.; Oleastro, Mónica; Roxo-Rosa, Mónica; Vítor, Jorge; Lehours, Phillipe; Vale, FilipaUntil recently, Helicobacter pylori was considered a bacterium without prophages. The presence of an incomplete prophage sequence in strain B38 and a complete prophage sequence in strain B45 showed otherwise. Using a PCR strategy, based on degenerated primers designed after aligning bacteriophage integrase genes from H. pylori strains B38 and B45, and H. acinonychis prophage II, we found that integrase sequence...
Proteome analysis of clustered helicobacter pylori strains
Vitoriano, Inês; Vítor, Jorge; Oleastro, Mónica; Roxo-Rosa, Mónica; Vale, FilipaGenomic-methylation typing method, based on strains’ Restriction/Modification systems, confirmed the genetic variability of Helicobacter pylori. According to this, strains isolated from patients of the same family, or from the same geographic region, cluster together. The analysis of proteome’s variability of these clusters has been a missing topic. We applied the Minimum-Common-Restriction-Modification (MCRM) ...