Assessment of Two Different Glucagon Assays in Healthy Individuals and Type 1 and Type 2 Diabetes Patients

Biomolecules

Martina Brunner¹  Eva Svehlikova²  Othmar Moser²  Thomas R. Pieber²  Maximilian Haberlander²  Beate Boulgaropoulos²  Barbara Obermayer-Pietsch²  Harald Sourij²  Reingard Raml³ 

[1] CF-Clinical Trials Unit, Center for Medical Research, Medical University of Graz, 8036 Graz, Austria;Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria;Joanneum Research Forschungsgesellschaft mbH HEALTH—Institute for Biomedicine and Health Sciences, 8010 Graz, Austria;

关键词: glucagon assay;    glucagon;    ELISA;    RIA;    type 1 diabetes mellitus;    type 2 diabetes mellitus;   

DOI  :  10.3390/biom12030466

来源: DOAJ

【 摘 要 】

Methods for glucagon analysis suffered in the past from lack of specificity and a narrow sensitivity range, which has led to inaccurate results and to the suggestion that type 1 diabetes (T1D) and type 2 diabetes (T2D) patients have elevated fasting glucagon levels. However, the availability of more specific and more sensitive methods to detect intact glucagon has shown that actual glucagon levels are lower than previously assumed. This study aimed to characterize fasting plasma glucagon levels in healthy individuals and T1D and T2D patients with two different glucagon assays. The study included 20 healthy individuals, 20 T1D and 20 T2D patients. Blood was collected under fasting conditions. A double-antibody sandwich enzyme-linked immunosorbent assay (ELISA) and a conventional radioimmunoassay (RIA) were used. A significant difference in fasting glucagon levels between healthy individuals and T2D was observed by ELISA, but not by RIA. ELISA also yielded lower glucagon levels in healthy individuals than in T1D and T2D patients which RIA did not. RIA produced significantly (p = 0.0001) higher overall median glucagon values than ELISA in a pooled analysis. These results underline the notion that the choice of selective laboratory methods is highly relevant for mechanistic endocrine research.

【 授权许可】

Unknown