Abstract：
:To learn more about the preclinical phase of IDDM we observed for a median period of 46.5 months (range 0.5-69 months) a group of 57 siblings positive for ICA and/or IAA when first screened within 6 months of the diagnosis of the proband. Sequential blood samples and IVGTTs were obtained at intervals of 6-12 months. Seventeen siblings (29.8%) presented with IDDM during the observation period. The duration of the known preclinical period ranged from 0.5 to 51 months (median 29 months). The converters were younger than the other siblings (P < 0.05) and had higher initial ICA levels (P < 0.01). In addition they had a lower FPIR in the first IVGTT (P < 0.001). On all subsequent tests the converters had higher ICA levels and a lower FPIR (P < 0.05 or less), a lower glucose elimination rate from the third test onwards (P < 0.01 or less) and higher IAA levels at 3 years (P < 0.05). Some variation could be observed in the FPIR in the converters with an initial increase and subsequent decrease (P < 0.05 for both). Their levels of complement-fixing ICA increased up to 18 months (P < 0.05) and IAA levels up to 3 years (P < 0.01). Those high risk siblings who progress to clinical IDDM are characterized by young age, strong and increasing signs of islet-cell specific autoimmunity, reduced insulin secreting capacity and emerging glucose intolerance. The present observations seem to be incompatible with the hypothesis of beta-cell destruction occurring at a constant, predictable rate.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Knip M,Vähäsalo P,Karjalainen J,Lounamaa R,Akerblom HKdoi
10.1007/s001250050122subject
Has Abstractpub_date
1994-04-01 00:00:00pages
388-93issue
4eissn
0012-186Xissn
1432-0428journal_volume
37pub_type
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