Thomas Dyrberg

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Autoantibodies to glutamic acid decarboxylase (GAD) are frequent at or before the onset of insulin-dependent diabetes mellitus (IDDM). We have developed a simple, reproducible, and quantitative immunoprecipitation radioligand assay using as antigen in vitro transcribed and translated [35S]methionine-labeled human islet GAD65. By using this assay, 77% (77 of(More)
An unselected population of 755 siblings of children with insulin-dependent diabetes mellitus (IDDM) was studied to evaluate the predictive characteristics of islet cell antibodies (ICA), antibodies to the IA-2 protein (IA-2A), antibodies to the 65-kD isoform of glutamic acid decarboxylase (GADA), insulin autoantibodies (IAA), and combinations of these(More)
To investigate whether type 1 diabetes in man is associated with a preferential Th1/Th2 response, and whether autoantibodies to one of the main autoantigens would reflect such a response, we characterized the immunoglobulin isotype profile to the 65-kDa isoform of glutamic acid decarboxylase (GAD65) in siblings to IDDM patients. Samples obtained from(More)
A 64-kDa islet protein is a major autoantigen in insulin-dependent diabetes mellitus (IDDM). Autoantibodies against the 64-kDa protein were recently shown to immunoprecipitate glutamic acid decarboxylase (GAD; L-glutamate 1-carboxy-lyase, EC from brain and from islets. We present evidence that the autoantisera also recognize a hydrophilic islet(More)
To test the role of glutamic acid decarboxylase (GAD65) or bovine serum albumin (BSA) autoimmunity in the pathogenesis of diabetes, GAD65 or BSA was injected intraperitoneally into neonatal female NOD mice (100 micrograms/mouse of each protein). Treatment with GAD65, but not with BSA, significantly delayed the onset of diabetes compared with control mice (P(More)
At and before onset, most insulin-dependent diabetics (IDDM) have islet GAD65 autoantibodies (GAD65Ab). Since IDDM also occurs in older patients where non-insulin-dependent diabetes is common, we studied GAD65Ab at onset to classify diabetes type. Our quantitative immunoprecipitation assay uses recombinant human islet GAD65 stably expressed in hamster(More)
Spontaneous insulin-dependent diabetes mellitus (IDDM) in the BB rat is associated with the presence of antibodies to a 64-kilodalton rat islet cell protein. These protein antibodies appeared in young animals and remained for as long as 8 weeks before the clinical onset of IDDM. Antibodies to a 64-kilodalton human islet cell protein were found to be(More)
GAD65 (glutamic acid decarboxylase) is an important autoantigen in both type 1 (insulin-dependent) diabetes mellitus (IDDM) and the neurological autoimmune disease stiff-man syndrome (SMS), and is expressed in pancreatic islets as well as the nervous system. Still, only 30% of SMS patients also have type 1 diabetes. To study regulation of T cell(More)
Targeted immune regulation can be achieved by use of tissue-specific T cells and offers the potential for organ-specific suppression of destructive autoimmune processes. Here, we report the generation and characterization of insulin B chain-specific "autoreactive" CD4+ regulatory T cells that locally suppress diabetogenic T cell responses against an(More)
DNA isolated from diabetic BB (BB/Hagedorn) rats was examined for restriction fragment length differences within the major histocompatibility complex (MHC) as compared with nondiabetic (W-subline) BB rats. Polymorphisms were detected using a mouse class I MHC gene as probe. Specifically, a 2-kb BamHI fragment was present in all the nondiabetic rats(More)