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01.12.2015 | Research article | Ausgabe 1/2015 Open Access

BMC Endocrine Disorders 1/2015

Insulin secretion in patients with latent autoimmune diabetes (LADA): half way between type 1 and type 2 diabetes: action LADA 9

Zeitschrift:
BMC Endocrine Disorders > Ausgabe 1/2015
Autoren:
Marta Hernandez, Angels Mollo, Josep Ramon Marsal, Aureli Esquerda, Ismael Capel, Manel Puig-Domingo, Paolo Pozzilli, Alberto de Leiva, Didac Mauricio, on behalf of the Action LADA consortium
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1472-6823-15-1) contains supplementary material, which is available to authorized users.

Competing interests

The authors declare that they have no competing interest.

Authors’ contributions

DM designed the study. MH, AM, AE, IC, JRE and DM collected the data. MH, AM, AE, and DM analysed data for the study. All authors contributed to the interpretation of the data. MH and DM drafted the manuscript. All authors critically reviewed and edited the manuscript. All authors gave their final approval of the version to be published.

Abstract

Background

The study of endogenous insulin secretion may provide relevant insight into the comparison of the natural history of adult onset latent autoimmune diabetes (LADA) with types 1 and 2 diabetes mellitus. The aim of this study was to compare the results of the C-peptide response to mixed-meal stimulation in LADA patients with different disease durations and subjects with type 2 and adult-onset type 1 diabetes.

Methods

Stimulated C-peptide secretion was assessed using the mixed-meal tolerance test in patients with LADA (n = 32), type 1 diabetes mellitus (n = 33) and type 2 diabetes mellitus (n = 30). All patients were 30 to 70 years old at disease onset. The duration of diabetes in all groups ranged from 6 months to 10 years. The recruitment strategy was predefined to include at least 10 subjects in the following 3 disease onset categories for each group: 6 to 18 months, 19 months to 5 years and 5 to 10 years.

Results

At all time-points of the mixed-meal tolerance test, patients with LADA had a lower stimulated C-peptide response than the type 2 diabetes group and a higher response than the type 1 diabetes group. The same results were found when the peak or area under the C-peptide curve was measured. When the results were stratified by time since disease onset, a similar pattern of residual insulin secretory capacity was observed.

Conclusions

The present study shows that the magnitude of stimulated insulin secretion in LADA is intermediate between that of type 1 and type 2 diabetes mellitus.
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