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Insulin autoantibodies (IAAs) occur in newly diagnosed human insulin-dependent diabetes mellitus (IDDM) patients, but their presence in BB rats is controversial, possibly due to assay differences or variability in the animals studied. To resolve this controversy, IAAs were measured in well-characterized inbred BB rats both in radioligand assays with 125I-labeled rat insulin I or II, respectively,
Restriction fragment length polymorphism using an HLA‐DQ β‐chain genomic probe showed that 63 children with insulin‐dependent (type 1) diabetes mellitus (IDDM) were all (100%) positive for the BamH1 fragments 12 kb and/or 4 kb compared to 98% (62/63) for HLA‐DR3 and/or 4 and 75% (47/63) for HLA‐B8 and/or 15. The 36 (56%) DR3‐positive children were all 4‐kb‐positive; however, a total of 44 (70%) ch
To evaluate the exocrine pancreatic function at the time of diagnosis of insulin-dependent diabetes mellitus, we determined immunoreactive an-odal and cathodal trypsin(ogen) levels in sera from almost all children (n = 375) 0-14 years of age in Sweden in whom diabetes developed during 1 year, and in sex-, age-, and geographically matched control subjects (n = 312). The median level of anodal tryps
Background: The impact of a change in mitral regurgitation (MR) following TAVR is unknown. We studied the impact of baseline MR and early post-procedural change in MR on survival following TAVR. Methods: The SWEDEHEART registry included all TAVRs performed in Sweden. Patients were dichotomized into no/mild and moderate/severe MR groups. Vital status, echocardiographic data at baseline and within 7
Diabetes-prone BB rats were examined before, during, and after clinical onset of diabetes for the occurrence of circulating islet cell surface antibodies (ICSAs) with a specific binding to islet β-cells. The presence of ICSA was assessed by incubating serum immunoglobulin fractions with normal Wistar rat islet cells and identifying cell-bound immunoglobulins by indirect immunofluorescence and by a
A BamHI 3.7-kilobase (kb) fragment detected by an HLA-DQ β-chain complementary DNA (cDNA) probe and negatively associated with insulin-dependent diabetes mellitus (IDDM) was cloned and sequenced to localize the polymorphism to BamHI sites in intervening sequences of an HLA-DQ β-chain gene. A probe of the first intervening sequence (IVS 1) showed the BamHI 3.7-kb fragment in 6 of 17 HLA-DR3/4 contr
An insulin-producing cell line, Clone-16, of hamster origin, was characterized for islet hormone production and for reactivity with islet cell surface (ICSA) and islet cell cytoplasmic (ICA) antibodies in sera from children with newly diagnosed insulin-dependent (Type 1) diabetes mellitus (IDDM). The Clone-16 cells have a doubling time of about 50-60 hr. The cells produced 63 ± 3 ng (mean ± SD) im
The conventional indirect immunofluorescence test of islet cell antibodies was recently improved by the development of a two-colour immunofluorescence assay using a monoclonal proinsulin antibody to detect islet B cells. The aim of this study was to test whether in this new assay the prevalence and titre of ICA were affected by the time of incubation carried out in the presence of aprotinin (Trasy
There is a high prevalence of islet cell antibodies (ICA) and autoantibodies detected against an islet cell protein of M(r) 64,000 at the time of clinical diagnosis of insulin-dependent diabetes (IDDM). In view of the biphasic immune response after antigen presentation, the purpose of this study was to determine the presence of ICA and antibodies against the 64,000 islet antigen after separation o
A simple and sensitive immunoradiometric assay for the detection of islet cell surface antibodies (CIRMA) has been developed. Live, transformed islet cells derived from a liver metastasis of a transplantable islet cell tumor were grown in removable microtiter wells and incubated with antibody. Cell-bound antibodies were quantitated using 125I-labelled second antibodies. The assay was used to detec
A liver metastasis (MSL) with a remarkable in vitro proliferation potential has been identified in an NEDH rat carrying a transplantable x-ray-induced islet cell tumor. Two insulin-secreting cell lines, MSL-G and MSL-H, with doubling times of 3-5 d were established by repeated limiting dilution cloning. In vivo inoculation of MSL-G cells induced severe hypoglycemia caused by a small but highly het
Column perfusion of mouse pancreatic islets was used to study the ability of amino acids and their methyl esters to influence insulin release and activate islet glutamate dehydrogenase activity. In the absence of L-glutamine, L-serine and the methyl ester of L-phenylalanine, but neither L-phenylalanine nor L-serine methyl ester, stimulate insulin secretion. In the presence of L-glutamine, however,
The presence of organ-specific autoantibodies including islet cell surface, cytoplasmic and cytotoxic as well as thyroid-gastric antibodies were determined in healthy, non-diabetic, first-degree relatives to 30 insulin-dependent diabetic (IDDM) children. Thirty healthy families without family-history of diabetes mellitus served as controls. The prevalence of organ-specific autoantibodies among the
