The presence of leucocyte migration inhibition factor (LIF) in supernatants from apparently antigen- and mitogen-free cultures of mononuclear cells (MNC) was studied. MNC were eluted from inflamed synovial tissue or isolated from blood. Untreated supernatants, supernatants in which any LIF had been inactivated, and culture medium were compared in their ability to affect the migration of homolog...

O antigen is part of the lipopolysaccharide present in the outer membrane of gram-negative bacteria. The surface-exposed O antigen is subject to selection by the host immune system, which may account for the maintenance of many different O-antigen forms. Characteristically, all genes specific to O-antigen synthesis are clustered in a region close to the his and gnd genes on the chromosome of Es...

In recent years there have been major efforts to develop glycoconjugate vaccines based on the Vi polysaccharide that will protect against Salmonella enterica Typhi infections, particularly typhoid fever, which remains a major public health concern in low-income countries. The design of glycoconjugate vaccines influences the immune responses they elicit. Here we systematically test the response ...

To increase the protective efficacy against influenza in pediatric populations, several attempts to modify the composition or the route of administration of an inactivated influenza vaccine have been made. Adjuvants have been added, vaccines with higher antigen content have been developed and intradermal administration of inactivated influenza vaccine with a variety of devices has been consider...

Abstract The COVID-19 pandemic is a global health crisis that poses great challenge to the public system of affected countries. Safe and effective vaccines are needed overcome this crisis. Here, we develop assess protective efficacy immunogenicity an inactivated SARS-CoV-2 vaccine in rhesus macaques. Twenty macaques were divided into four groups five animals each. One group was administered pla...

Formalin-inactivated Venezuelan equine encephalomyelitis vaccine was prepared from virus grown in rolling-bottle cultures of chicken embryo cells. Trinidad strain virus was propagated in these cultures with a maintenance medium consisting of serum-free medium 199 containing 0.25% human serum albumin (USP) and antibiotics. Manipulation of multiplicity of inoculum (0.06 to 0.00006) and maintenanc...

We used the recombination-promoting activity of the polyomavirus large T antigen (T-ag) to increase the frequency of gene targeting in rat fibroblasts. We constructed a cell line carrying a functional polyomavirus replication origin and a transformation-defective middle T-ag oncogene. The structure of the locus was such that homologous recombination with the targeting DNA reconstituted a functi...

Preconditioning the immune system with a tetanus/diphtheria toxoid significantly improved the effectiveness of dendritic cell immunotherapy and extended overall survival in a small, randomized study of patients with glioblastoma.

1. Diez-Delgado J, Dal-Ré R, Llorente M, González A, López J. Hepatitis B component does not interfere with the immune response to diphtheria, tetanus and whole-cell Bordetella pertussis components of a quadrivalent (DTPw-HB) vaccine: a controlled trial in healthy infants. Vaccine1997; 15: 1418-1422. 2. Shah R, Raghu MB, Shivanada A, Mangayarkarasi S, Rao I, Rao R, et al. Immunogenicity and saf...

PURPOSE The aim of this study was to investigate among adolescents in Antwerp their knowledge about vaccination and to describe their information sources, motives and barriers for vaccination. METHODS In March 2009, adolescents aged between 14 and 17 years from three schools with a mixed Belgian and immigrant population in Antwerp completed a written questionnaire concerning vaccination. The ...