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Biomedical subjects

R S van Binnendijk

Publications and source records attributed to R S van Binnendijk.

At least 19 recordsLinked to original sources
PubMed2006

[Two patients with mumps].

Two patients, men aged 17 and 19 years respectively, were admitted with parotitis epidemica and orchitis caused by mumps. The second patient also had meningitis. PCR analysis revealed that, in both cases, the causative agentwas a mumps virus that was genetically related to a wild-type virus responsible for an outbreak in Singapore. This viral strain was also responsible for a mumps outbreak at Hotel School The Hague in September 2004. Both patients were not fully vaccinated. Both patients were from regions in which clustering of patients with clinical signs of mumps has been seen. Interestingly, a number of patients with confirmed mumps had been fully vaccinated. Possible explanations for the increase in mumps cases include low vaccination and immunity levels, primary and secondary vaccine failure and the emergence of genetically disparate mumps viruses.

Adolescent↗
PubMed2005

[Rubella epidemic in the Netherlands, 2004/'05: awareness of congenital rubella syndrome required].

Rubella is a public health problem due to the teratogenic effects associated with primary rubella infection during pregnancy (congenital rubella syndrome). Following universal rubella vaccination of infants in the Netherlands, the incidence of rubella has declined dramatically. However, since September 2004, an outbreak has occurred among unvaccinated individuals, most of whom declined vaccination based on religious beliefs. In the period 1 September 2004-22 March 2005, 166 cases of rubella were reported, including 12 pregnant women. Monitoring for signs that the epidemic has spread to other populations in the Netherlands is important because this might indicate the need for additional interventions. Awareness among health-care workers of the possible occurrence of congenital rubella syndrome should be raised. The clinical manifestations of congenital rubella syndrome are diverse, can be transient or permanent, and may not present until adolescence or adulthood. All cases of laboratory-confirmed rubella infection and congenital rubella syndrome should be reported to municipal health authorities. There is a possibility that this outbreak will spread abroad. The WHO aims to reduce the incidence of congenital rubella syndrome to < 1/100,000 live births. Health-care workers in the Netherlands should be extra alert to detect and notify rubella in a timely manner.

Disease Outbreaks↗
PubMed2001

[Measles epidemic in the Netherlands, 1999-2000].

OBJECTIVE: Description of measles epidemic in the Netherlands, 1999-2000. DESIGN: Observational descriptive study. METHODS: Intensified surveillance of measles cases by means of a case register established at the 'Landelijke Coördinatiestructuur Infectieziektebestrijding (LCI)' [National Co-ordination Centre for Communicable Disease Outbreak Management]. RESULTS: There were 3,292 reported measles patients, most of whom came from areas with low vaccine coverage. Of these patients, 94% had not been vaccinated; in 85% of cases this was for religious reasons. Of the 158 (5%) vaccinated patients, 157 had not (yet) received a second dose of vaccine. The incidence of measles increased with decreasing vaccine coverage in a municipality, both for unvaccinated and vaccinated persons. Three of the reported patients died. The percentage of patients with one or more complications was 22% in the group < 15 months of age, 19% in the group 15 months-4 years, 16% in the group 5-9 years, 11% in the group 10-19 years, and 15% in the group > 19 years of age. CONCLUSION: Considering the complications observed, the epidemic described involved a serious disease. Vaccination was accompanied by effective protection against measles infection and its complications. Herd immunity outside the unvaccinated groups was sufficient to prevent an epidemic there. However, incidental spread to vaccinated children did occur; the greatest risk factor for acquiring measles for vaccinated children is a stay in an area with low vaccine coverage.

Adolescent↗
PubMed2001

Measles outbreak in a community with very low vaccine coverage, the Netherlands.

A 1999-2000 measles epidemic in the Netherlands started with an outbreak in an orthodox reformed elementary school with 7% vaccine coverage. The overall attack rate was 37%: 213 clinical cases among the 255 participating pupils (response 62%) and 327 household members. The attack rate ranged from 0% for the oldest groups of pupils to 88% for the youngest, who had not been exposed in previous measles epidemics. None of 25 vaccinated pupils had clinical symptoms. Among pupils with clinical symptoms, the self-reported complication rate was 25%. These data confirm that measles infection causes severe disease and that vaccination is the most effective means of preventing the disease and its complications. The data also show that clusters of persons refraining from vaccination interfere with measles elimination even in populations with very high overall vaccine coverage (96%).

Adolescent↗
PubMed2000

Transgenic mice expressing human HLA and CD8 molecules generate HLA-restricted measles virus cytotoxic T lymphocytes of the same specificity as humans with natural measles virus infection.

Control of primary measles virus (MV) infection in humans and continued maintenance of immune memory that protects against reinfection are mediated primarily through the anti-MV T cell response, as judged by observations of children with defects in antibody formation but competency in making T cells. Further, the failure of T cell responses in those infected with MV most often leads to overwhelming infection. To better define and manipulate the elements involved in human T cell responses to MV, we analyzed the generation of HLA-restricted cytotoxic T lymphocytes (CTL) in a small animal model. Transgenic mice expressing the human class I MHC antigen HLA-B27 in conjunction with human CD8 molecules produced vigorous HLA-restricted CTL responses to MV antigens, paralleling those in MV infection of humans. In addition, such humanized mice generated human CD8 coreceptor-dependent HLA-B27-restricted CTL with the same specificity for recognition of MV fusion (F) peptide RRYPDAVYL as reported for humans during natural MV infection. Neither murine beta(2)-microglobulin nor murine CD8 substituted adequately as coreceptors for the HLA-B27 heavy chain. By contrast, HLA-A2.1-restricted responses to measles could be generated in the absence of expression of human beta(2)-microglobulin or CD8(+) molecules in HLA-A2.1/K(b) transgenic mice. Thus a small animal model is now available for studying strategies for optimizing human CD8(+) T cell responses and for testing vaccines. This model offers the potential, when combined with the newly reported CD46 transgenic mouse model in which MV replicates in cells of the immune system, for uncoding the molecular mechanism of MV-induced immunosuppression.

Animals↗
PubMed2000

Protective immunity in macaques vaccinated with a modified vaccinia virus Ankara-based measles virus vaccine in the presence of passively acquired antibodies.

Recombinant modified vaccinia virus Ankara (MVA), encoding the measles virus (MV) fusion (F) and hemagglutinin (H) (MVA-FH) glycoproteins, was evaluated in an MV vaccination-challenge model with macaques. Animals were vaccinated twice in the absence or presence of passively transferred MV-neutralizing macaque antibodies and challenged 1 year later intratracheally with wild-type MV. After the second vaccination with MVA-FH, all the animals developed MV-neutralizing antibodies and MV-specific T-cell responses. Although MVA-FH was slightly less effective in inducing MV-neutralizing antibodies in the absence of passively transferred antibodies than the currently used live attenuated vaccine, it proved to be more effective in the presence of such antibodies. All vaccinated animals were effectively protected from the challenge infection. These data suggest that MVA-FH should be further tested as an alternative to the current vaccine for infants with maternally acquired MV-neutralizing antibodies and for adults with waning vaccine-induced immunity.

Animals↗
PubMed1999

Recycling MHC class I molecules and endosomal peptide loading.

MHC class I molecules usually present peptides derived from endogenous antigens that are bound in the endoplasmic reticulum. Loading of exogenous antigens on class I molecules, e.g., in cross-priming, sometimes occurs, but the intracellular location where interaction between the antigenic fragment and class I takes place is unclear. Here we show that measles virus F protein can be presented by class I in transporters associated with antigen processing-independent, NH(4)Cl-sensitive manner, suggesting that class I molecules are able to interact and bind antigen in acidic compartments, like class II molecules. Studies on intracellular transport of green fluorescent protein-tagged class I molecules in living cells confirmed that a small fraction of class I molecules indeed enters classical MHC class II compartments (MIICs) and is transported in MIICs back to the plasma membrane. Fractionation studies show that class I complexes in MIICs contain peptides. The pH in MIIC (around 5.0) is such that efficient peptide exchange can occur. We thus present evidence for a pathway for class I loading that is shared with class II molecules.

B-Lymphocytes↗
PubMed1998

Measles virus fusion protein- and hemagglutinin-transfected cell lines are a sensitive tool for the detection of specific antibodies by a FACS-measured immunofluorescence assay.

A FACS-measured immunofluorescence assay was developed for the detection of antibodies directed against the hemagglutinin (H) and fusion (F) glycoproteins of measles virus (MV). Human melanoma cell lines transfected with either the MV H or F genes, which showed a high surface expression of the respective proteins in their native conformation, were used as target cells. The cells were incubated with diluted plasma samples, and stained subsequently with FITC-conjugated secondary antibodies. The FACS-measured fluorescence signals correlated directly with the amount of specific immunoglobulins over a wide concentration range. The use of different conjugates enabled the separate detection of MV-specific IgG, IgM, IgA and IgG subclasses, with relatively low backgrounds. Hemagglutinin-specific IgG, IgM and IgA fluorescence signals were shown to correlate well with MV-specific IgG ELISA titers and MV-specific IgM or IgA capture ELISA OD450-values, respectively. The polyclonal conjugates with specificity for human immunoglobulins offered sufficient cross-reactivity to detect MV-specific IgG, IgM and IgA in plasma samples of cynomolgus macaques, making this technique a useful tool for studying serological responses in vaccination and challenge experiments in non-human primate models.

Animals↗
PubMed1998

Identification and characterization of herpes simplex virus-specific CD4+ T cells in corneas of herpetic stromal keratitis patients.

Herpetic stromal keratitis (HSK) is a corneal disease initiated by a herpes simplex virus (HSV) infection with a postulated T cell-mediated immunopathology. To study the antigen specificity of cornea-infiltrating T cells in HSK patients, T cells were isolated and expanded by mitogenic stimulation from corneas of 2 patients with HSV-1-mediated HSK. A substantial number of the T cell clones (TCCs) obtained from these T cell lines were HSV-specific. All HSV-specific TCCs were of the CD3+CD4+CD8- phenotype. These TCCs responded to autologous HSV-infected corneal keratocytes, which expressed HLA class II molecules following incubation with interferon-gamma. Upon HSV-specific stimulation, all TCCs secreted interleukin-4, interleukin-5, and interferon-gamma. The data presented suggest that HSV-specific CD4+ T cells play a role in the immunopathogenesis of HSK in humans and that corneal keratocytes may act as antigen-presenting cells in this local T cell response.

Antigen Presentation↗
PubMed1997

Protective immunity in macaques vaccinated with live attenuated, recombinant, and subunit measles vaccines in the presence of passively acquired antibodies.

The presence of maternal antibodies is one of the main causes of measles vaccine failure. To evaluate the interference of passively acquired antibodies with vaccine efficacy, macaques (n = 16) were vaccinated with live attenuated measles vaccine in the presence or absence of passively acquired measles virus-specific monkey serum antibodies. As little as 0.1 IU of virus-neutralizing antibody/mL of serum abrogated the induction of specific serum IgM, IgG, and virus-neutralizing antibodies. This effect was also demonstrated in monkeys vaccinated with live recombinant vaccinia virus expressing the hemagglutinin and fusion proteins of measles virus but not in monkeys vaccinated with the same proteins incorporated into immune-stimulating complexes. All of the monkeys vaccinated in the presence of virus-neutralizing antibodies (n = 9) were still largely protected from intratracheal challenge with wild type virus. This protection is probably mediated by the observed specific T lymphocyte responses.

Animals↗
PubMed1994

[A measles epidemic in an adequately vaccinated middle school population].

OBJECTIVE: To assess the extent of a measles epidemic in a secondary school. DESIGN: Retrospective and questionnaire investigation. SETTING: Secondary school, Bilthoven. METHOD: Questionnaire followed by laboratory testing for measles and other infectious diseases with exanthema. RESULTS: The response rate was 99% (935/949 pupils, aged 12-21 years, vaccination rate 92%). Seventy-seven students underwent laboratory investigations. Measles virus was isolated in 2 suspected patients. Thirty-three of 37 patients with clinical or laboratory criteria of measles had been vaccinated. Complications of measles were not detected. Infection was also detected in patients with relatively few or atypical symptoms. The protective efficacy of measles vaccine could be determined because the attack rate of the school population was less than 5%. CONCLUSION: Primary failure of the measles vaccine might be the cause of the minor epidemic but the results do not cast doubt on the efficacy of the current measles vaccination programme.

Adolescent↗
PubMed1994

Viral replication and development of specific immunity in macaques after infection with different measles virus strains.

Cynomolgus monkeys (Macaca fascicularis) were experimentally infected with a wild type measles virus (MV) strain (MV-BIL). Following intratracheal inoculation with different infectious doses, the virus could be isolated from peripheral blood mononuclear cells (PBMC), lung lavage cells, and pharyngeal cells. The kinetics of the cell-associated viremia was similar in all infected animals. They developed specific serum IgM, IgG, and neutralizing antibody responses as well as MV-specific T cell-mediated immunity. Monkeys infected intratracheally or intramuscularly with the wild type MV-Edmonston or the attenuated MV-Schwartz strain showed a lower level of PBMC-associated viremia and less pronounced specific IgM responses. Nine months after infection with MV strains, all of the monkeys were protected from intratracheal reinfection with MV-BIL. This monkey model is suitable for study of new generations of vaccines and vaccination strategies for measles.

Animals↗
PubMed1994

Measles vaccines: novel generations and new strategies.

Although the introduction of live attenuated measles vaccines in industrialized countries in the 1960s has largely contributed to the control of measles, the disease remains a major cause of serious disease and mortality in many developing countries. This is largely because of low vaccine coverage and interference by maternally derived antibodies. To overcome these problems, new vaccination strategies and novel generations of vaccines should be developed. Among the approaches presently considered are the use of different routes of application of new attenuated measles and recombinant viruses and of viral subunits presented with new adjuvant systems. To evaluate the potential of these new approaches in terms of protective mechanisms, efficacy, and safety, a recently evaluated macaque model of measles virus infection may be expected to be a potent tool.

Animals↗
PubMed1993

Human HLA class I- and HLA class II-restricted cloned cytotoxic T lymphocytes identify a cluster of epitopes on the measles virus fusion protein.

The transmembrane fusion (F) glycoprotein of measles virus is an important target antigen of human HLA class I- and class II-restricted cytotoxic T lymphocytes (CTL). Genetically engineered F proteins and nested sets of synthetic peptides spanning the F protein were used to determine sequences of F recognized by a number of F-specific CTL clones. Combined N- and C-terminal deletions of the respective peptides revealed that human HLA class I and HLA class II-restricted CTL efficiently recognize nonapeptides or decapeptides representing epitopes of F. Three distinct sequences recognized by three different HLA class II (DQw1, DR2, and DR4/w53)-restricted CTL clones appear to cluster between amino acids 379 and 466 of F, thus defining an important T-cell epitope area of F. Within this same region, a nonamer peptide of F was found to be recognized by an HLA-B27-restricted CTL clone, as expected on the basis of the structural homology between this peptide and other known HLA-B27 binding peptides.

Amino Acid Sequence↗