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  • Electronic Resource  (2)
  • IgG  (1)
  • healthy volunteers  (1)
  • 1
    ISSN: 1432-0428
    Keywords: Juvenile diabetes mellitus ; autoantibodies ; fluorescent antibody technique ; prediabetic state ; IgG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Circulating islet cell antibodies (ICA) were present in high frequency (80%) early after diagnosis and decreased in the time course of childhood diabetes mellitus. The complement fixing ability of islet cell antibodies (CF-ICA) in the course of the disease appeared to depend on the titre of ICA: the coefficient of correlation between ICA and CF-ICA titres was 0.79 and all ICA's with a titre over 16 were complement-fixing. Incubating fresh frozen human pancreatic sections thrice rather than once with the children's sera, increased the detectability of complement fixation by a factor 1.4 in all ICA-positive sera. Thus tested, the detection of complement fixation per se did not appear to have a separate pathogenic significance, as the fraction of complement fixing ICA's was almost constant throughout the clinical course. The presence of ICA-IgG subclasses also was dependent on the ICA titre: above a titre of 16 mostly all four subclasses could be detected. Incubating the pancreatic tissue thrice rather than once with ICA-positive sera resulted in enhanced detectability of ICA-IgG1. Early in the course of childhood diabetes, including two prediabetic children, most of the IgG subclasses could be detected in ICA, but after a duration of one year IgG1 alone was mainly seen. In two other children, having a family history of insulin-dependency, restriction to the IgG2 subclass was found.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 40 (1995), S. 609-614 
    ISSN: 1573-2568
    Keywords: serology ; gastritis ; Helicobacter pylori ; healthy volunteers ; pepsinogens ; gastrin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was undertaken in healthy volunteers to determine the relation between serum levels of pepsinogen A, pepsinogen C, pepsinogen A:C ratio, and gastrin on the one hand and histology of the gastric mucosa on the other. The grade of gastritis was scored separately for antral and fundic mucosa by three different classifications: Whitehead, activity, and the Sydney score. Among 48 healthy volunteers studied, 17 were found to have gastritis according to the criteria of Whitehead. Fourteen of these 17 subjects with gastritis hadH. pylori in gastric biopsies. In all 48 subjects serum pepsinogen A (r=0.298−0.506;P〈0.01−P〈0.05), pepsinogen A:C ratio (r between −0.377 and −0.495;P〈0.001−P〈0.05) and gastrin (r=0.38−0.695;P=0.007−P〈0.01) were significantly correlated to the severity of both antral and body gastritis as assessed by all three classifications. In contrast, there was no significant correlation between serum pepsinogen C and any of the gastritis scores. When the 17 subjects with gastritis were analyzed separately, there were no correlations between the parameters studied and gastritis of the antrum. Regarding the corpus mucosa, serum PgA correlated significantly with the activity score (r=0.520;P=0.03), weakly with the Sydney score (r=0.465;P=0.06), but not with the Whitehead score. Serum PgC correlated with the Whitehead (r=0.555;P=0.02) and Sydney score (r=0.523;P=0.03), but only weakly with the activity score (r=0.441;P=0.08). The pepsinogen A:C ratio showed only a weak inverse correlation with the Whitehead gastritis score (r=−0.471;P=0.06), but not with the two other scores. Serum gastrin was significantly correlated with the Whitehead (r=0.634;P=0.006) and the Sydney score (r=0.501;P=0.04), but not with the activity score of the fundic mucosa. It is concluded that among healthy volunteers with gastritis, serological parameters are only correlated to the severity of corpus but not of antral gastritis. Serum PgC and gastrin correlated to the severity of corpus gastritis only if atrophy is comprised in the classification. In contrast, serum PgA correlates only with the activity of corpus gastritis. Thus, serological parameters reflect specific histologic features of gastritis of the gastric body, but not of the antrum.
    Type of Medium: Electronic Resource
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