13 research outputs found
NOD2/CARD15, ATG16L1 and IL23R gene polymorphisms and childhood-onset of Crohn’s disease
AIM: To assess whether the polymorphisms of NOD2/CARD15, autophagy-related 16-like 1 (ATG16L1), and interleukin-23 receptor (IL23R) genes play a more critical role in the susceptibility of childhood-onset than in adult-onset Crohn’s disease (CD)
Dental Caries and Periodontal Disease in Children and Adolescents with Inflammatory Bowel Disease: A Case-Control Study
Background:Previous reports have demonstrated a higher prevalence of
dental caries and periodontal disease in adults with inflammatory bowel
disease (IBD), but similar data in children and adolescents do not
exist. The aim of the study was to evaluate the status of dental caries,
oral hygiene, gingival status and periodontal treatment needs of
children with IBD.Methods:In this case-control study, 55 children on
remission from a single outpatient IBD clinic, aged 4 to 18 years (12.27
3.67 yr) and 55 matched systemically healthy controls of a dental
practice were assessed prospectively. The evaluation included medical
history, dental questionnaire in both groups, and previous and current
medical therapy of children with IBD. Additionally, the decayed,
missing, and filled tooth (dmf-t or DMF-T), simplified gingival, plaque
control record and community periodontal treatment needs indices were
evaluated.Results:Children with IBD compared with controls had a
statistically significant (P < 0.001) higher dmf-t (2.95 versus 0.91) or
DMF-T (5.81 versus 2.04) index and a higher gingival inflammation
(simplified gingival, 40% versus 24%) although the respectively dental
plaque index showed no significant difference (plaque control record,
42% versus 41%). Also, the community periodontal treatment needs was
significantly higher compared with controls (P < 0.001); most of the
patients with IBD needed treatment of gingivitis (47% versus 4%), and
none of them had healthy periodontium (0% versus 69%).Conclusions:The
results of this case-control study demonstrate a higher frequency of
dental caries, more clinical signs of gingival inflammation, and
increased periodontal treatment needs in children and adolescents with
IBD despite similar oral hygiene status
Helicobacter pylori isolates from Greek children express type 2 and type 1 Lewis and alpha 1,6-glucan antigens in conjunction with a functional type IV secretion system
Helicobacter pylon infection is often acquired in childhood and can
persist for life. Previous studies in adult patients have shown that H.
pylori isolates from North American and European hosts express
predominantly type 2 Lewis x (Le(x)) and Le(y) epitopes, while Asian
strains have the capacity to express type 1 Le(a) and Le(b) structures.
In order to understand the influence of environmental and host factors
on the expression of Le antigens, we analysed 50 Greek H. pylori
isolates from symptomatic children. Both CagA-positive and -negative
strains were evaluated. The expression of Le antigens was determined by
whole-cell indirect ELISA (WCE), and LPS profiles were assessed by gel
electrophoresis and immunoblotting. Occurrence of Le(x) and/or Le(y)
antigens was confirmed in 35 of the isolates (70%) while 15 of the
isolates were non-typable. It was found that 11 of the paediatric
isolates had the propensity to express type 1 Le(b) blood-group antigen
(22%), a feature relatively uncommon in H. pylori isolates from adults.
One strain expressed both Le(b) and Le(a) antigens. The majority of the
isolates (49/50, 98%) expressed alpha 1,6-glucan, an antigenic non-Le
determinant present in the outer core region of H. pylon LPS. All Le(x)-
and Le(y)-expressing strains also carried a functional cag pathogenicity
island-encoding a type IV secretion system, capable of translocating
CagA protein, as well as the vacAs1 allele, suggesting that Le(x) and
Le(y) epitopes may aid the persistence of more aggressive strains. No
association between bacterial virulence characteristics and the
histopathological observations was evident
Helicobacter pylori isolates from Greek children express type 2 and type 1 Lewis and α1,6-glucan antigens in conjunction with a functional type IV secretion system
CagA and VacA Polymorphisms Do Not Correlate with Severity of Histopathological Lesions in Helicobacter pylori-Infected Greek Children
The presence of various numbers of EPIYA tyrosine phosphorylation motifs
in the CagA protein of Helicobacter pylori has been suggested to
contribute to pathogenesis in adults. In this prospective study, we
characterized H. pylori isolates from symptomatic children, with
reference to the diversity of functional EPIYA motifs in the CagA
protein and vacA isotypes, and assessed the potential correlation with
the histopathological manifestations of the infection. We analyzed 105
H. pylori isolates from 98 children and determined the diversity of
EPIYA motifs in CagA by amplification and sequencing of the 3’ variable
region of the cagA gene as well as vacA isotypes for the signal, middle,
and intermediate regions. CagA phosphorylation and levels of secreted
IL-8 were determined following in vitro infection of AGS gastric
epithelial cells. Histopathological evaluation of H. pylori
colonization, activity, and severity of the associated gastritis was
performed according to the updated Sydney criteria. EPIYA A
(GLKN[ST]EPIYAKVNKKK), EPIYA B (Q[V/A]ASPEPIY[A/T]QV AKKVNAKI),
and EPIYA C (RS[V/A]SPEPIYATIDDLG) motifs were detected in the ABC
(46.6%) and ABCC (17.1%) combinations. No isolates harboring more than
two EPIYA C motifs in CagA were found. The presence of isogenic strains
with variable numbers of CagA EPIYA C motifs within the same patient was
detected in seven cases. Occurrence of increasing numbers of EPIYA C
motifs correlated strongly with presence of a high-vacuolation (s1 or
s2/i1/m1) phenotype and age. A weak positive correlation was observed
between vacuolating vacA genotypes and presence of nodular gastritis.
However, CagA- and VacA-dependent pathogenicities were not found to
contribute to severity of histopathology manifestations in H.
pylori-infected children
Etude cas-témoins épidémiologique prospective multicentrique sur les facteurs de risque d'ulcères ou d'érosions gastriques et duodénaux chez les enfants: Une étude cas-témoin
info:eu-repo/semantics/publishe
Souvenirs de la Flandre-wallonne : recherches historiques et choix de documents relatifs à Douai et à la province / publiés par une réunion d'amateurs et d'archéologues
18711871 (T11)-1871.Appartient à l’ensemble documentaire : NordPdeC1Appartient à l’ensemble documentaire : RfnEns0Appartient à l’ensemble documentaire : RfnEuro1Appartient à l’ensemble documentaire : RfnCoop
Frequency and risk factors of gastric and duodenal ulcers or erosions in children: a prospective 1-month European multicenter study.
There are no solid figures of the frequency of ulcer disease during childhood in Europe. We assessed its frequency and analyzed known risk factors.Journal ArticleMulticenter StudySCOPUS: ar.jinfo:eu-repo/semantics/publishe