Increased spontaneous CCL2 (MCP-1) and CCL5 (RANTES) secretion in vitro in LADA compared to type 1 diabetes and type 2 diabetes: Action LADA 14.

Abstract

AIMS:

Immune-mediated type 1 diabetes (T1D) in adulthood and latent autoimmune diabetes in adults (LADA) share similar pathological mechanisms but differ clinically in disease progression. The aim of this study was to acquire insights into spontaneous and stimulated chemokine secretion of immune cells in different diabetes types.

MATERIALS AND METHODS:

We investigated in vitro spontaneous, mitogen (PI) and antigen (HSP60, p277, pGAD, pIA2) stimulated chemokine secretion of leucocytes from patients with T1D (n = 32), LADA (n = 22), type 2 diabetes (T2D; n = 49), and glucose-tolerant individuals (n = 13). Chemokine concentration in supernatants was measured for CCL2 (MCP-1), CXCL10 (IP10) and CCL5 (RANTES) using a multiplex bead array assay.

RESULTS:

Spontaneous secretion of CCL2 and CCL5 were higher in LADA compared to T1D and T2D (all p < 0.05) while CXCL10 was similar in the groups. Mitogen-stimulated secretion of CCL2 in LADA was lower compared to T1D and T2D (all p < 0.05) while CXCL10 and CCL5 were similar in all groups. Upon stimulation with pIA2 the secretion of CCL2 in LADA was lower compared to T2D (p < 0.05). Spontaneous CXCL10 secretion in LADA was positively associated with body mass index (r2  = 0.35; p = 0.0035) and C-peptide (r2  = 0.30; p = 0.009).

CONCLUSIONS:

Chemokine secretion is altered between different diabetes types. Increased spontaneous secretion of CCL2 and CCL5 and decreased secretion of CCL2, upon stimulation with PI and pIA2, in LADA compared to T1D and T2D could reflect altered immune responsiveness in LADA patients in association with their slower clinical progression compared to insulin dependence.

• Authors: Mark Ooms, Alexander Strom, Klaus Strassburger, Barbara Menart, Richard D Leslie, Nanette C Schloot
• Journal: Diabetes/metabolism research and reviews (Diabetes Metab Res Rev) Vol. 37 Issue 7 Pg. e3431 (10 2021) ISSN: 1520-7560 [Electronic] England
• PMID: 33369072 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2021 The Authors. Diabetes/Metabolism Research and Reviews published John Wiley & Sons Ltd.

Chemical References

• CCL2 protein, human
• CCL5 protein, human
• Chemokine CCL2
• Chemokine CCL5

Topics

• Adult
• Chemokine CCL2
• Chemokine CCL5
• Diabetes Mellitus, Type 1 (pathology)
• Diabetes Mellitus, Type 2 (pathology)
• Glucose Intolerance
• Humans
• Latent Autoimmune Diabetes in Adults