Biomedical subjects

Marjo Renko

Publications and source records attributed to Marjo Renko.

4 recordsLinked to original sources

PubMed2002

Association between surfactant protein A gene locus and severe respiratory syncytial virus infection in infants.

Respiratory syncytial virus (RSV) causes seasonal epidemics of bronchiolitis among susceptible infants. Surfactant protein A (SP-A), a lung C-type lectin involved in innate host defense, opsonizes RSV and enhances phagocytosis. The candidate gene approach was used to investigate association of SP-A polymorphism with susceptibility to severe RSV infection. Genotype analysis was done for 86 infants with severe RSV infection and 95 matched control subjects. A significant difference in the frequency of SP-A2 was observed. The SP-A2 allele 1A(3) was overrepresented in RSV-infected infants, compared with control subjects (5% vs. 0.5%; P =.006), whereas allele 1A was underrepresented (1% vs. 6%; P =.011). The allele pool in which lysine was amino acid 223 was overrepresented in infants with severe RSV infection (28% vs. 18%; P =.023), whereas the allele pool in which proline was amino acid 99 was underrepresented (5% vs. 16%; P =.001). These results indicate that a genetic association exists between SP-A gene locus and severe RSV infection.

Alleles↗

PubMed2002

Peer consultation as a method for promoting problem-based learning during a paediatrics course.

In problem-based learning (PBL) there are problems during tutorial group sessions, for example lack of participation, interaction and cohesion, and withdrawing. The authors evaluated whether these problems could be avoided with a peer consultation model. Peer consultation takes advantage of cooperation between students by encouraging them to accept more responsibility for learning from their peers. Forty-nine fifth-year students participated in three group sessions where they solved a paediatric case problem. The students were working in small groups, assuming the following roles in turn: presenters, facilitators and observers. The students reported that this consultative method forced one to actually define the problem, helped to develop communication skills and to identify problematic issues from different viewpoints and offered the possibility to evaluate personal problem-solving strategies. The method also gave an opportunity for students to learn in practice how to utilize new technology in data searching. These experiences suggest that the model of peer consultation adds new flavour, increasing enthusiasm in problem-based learning.

Cooperative Behavior↗

PubMed2002

Surfactant protein D gene polymorphism associated with severe respiratory syncytial virus infection.

Respiratory syncytial virus (RSV) is the major respiratory tract pathogen in infancy. Host-related differences in susceptibility to severe RSV infection suggest that genetic factors may play a role. In this study, a candidate-gene approach was used to study whether the surfactant protein D (SP-D) gene polymorphism associates with severe RSV infection. DNA samples from 84 infants hospitalized for the treatment of RSV bronchiolitis and 93 healthy controls were analyzed. The controls were matched with the cases on the basis of sex, hospital district, date of birth (+/-2 wk) and gestational age at birth (+/-2 wk). Three biallelic SP-D gene polymorphisms were genotyped. Significant differences were observed in the SP-D allele frequencies for amino acid 11 between the RSV infants and their matched controls. The frequency of the allele coding for Met 11 (p = 0.033) was increased in the severe RSV group. The frequency of the homozygous genotype Met/Met for amino acid 11 was increased in the RSV group relative to the controls, whereas the heterozygous genotype tended to be less frequent among the RSV cases than in the matched controls. Conditional logistic regression analysis was used to study whether the confounders, i.e. smoking and number of children in the family, influence the association between the homozygous SP-D genotype for methionine 11 and the risk of RSV bronchiolitis. The results further confirmed this association (p = 0.028). To our knowledge, the present report provides the first evidence of a specific gene associated with susceptibility to severe RSV infection.

Female↗

PubMed2002

Xylitol administered only during respiratory infections failed to prevent acute otitis media.

OBJECTIVE: As regular administration of xylitol had been effective in preventing acute otitis media (AOM) in children, we tested whether xylitol administered only at times of acute respiratory infection (ARI) reduces the occurrence of AOM. METHODS: Healthy children (N = 1277) were recruited from child care centers and randomized after screening with tympanometry to receive either control mixture (n = 212), xylitol mixture (n = 212), control chewing gum (n = 280), xylitol chewing gum (n = 286), or xylitol lozenges (n = 287) during an ARI. The trial was randomized and double blinded within the mixture and chewing gum groups. The parents began administering the products to their children at the onset of symptoms of ARI. The follow-up lasted until resolution of the symptoms or up to 3 weeks. RESULTS: A total of 1253 of the 1277 randomized children were eligible for the analysis. Altogether, 980 (78%) of 1253 children had at least 1 episode of ARI during the 4 months that the trial lasted. The occurrence of AOM during this episode was 34 (20.5%) of 166 in the xylitol mixture group, as compared with 32 (20.4%) of 157 among the children who received the control mixture. Among the older children who received control chewing gum, xylitol chewing gum, or xylitol lozenges, AOM was experienced by 24 (11.0%) of 218, 31 (14.1%) of 220, and 34 (15.5%) of 219, respectively. None of the differences between the groups was statistically significant. CONCLUSIONS: Xylitol administered only during an ARI was ineffective in preventing AOM.

Acute Disease↗