Published in:
Open Access
01-12-2014 | Original investigation
Immunization with advanced glycation end products modified low density lipoprotein inhibits atherosclerosis progression in diabetic apoE and LDLR null mice
Authors:
Lin Zhu, Zhiqing He, Feng Wu, Ru Ding, Qixia Jiang, Jiayou Zhang, Min Fan, Xing Wang, Bengtsson Eva, Nilsson Jan, Chun Liang, Zonggui Wu
Published in:
Cardiovascular Diabetology
|
Issue 1/2014
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Abstract
Background
Diabetes accelerates atherosclerosis through undefined molecular mechanisms. Hyperglycemia induces formation of advanced glycation end product (AGE)-modified low-density lipoprotein (LDL). Anti-AGE-LDL autoantibodies favor atherosclerosis (AS) progression in humans, while anti oxidized LDL immunization inhibits AS in hypercholesterolemic, non-diabetic mice. We here investigated if AGE-LDL immunization protects against AS in diabetic mice.
Methods
After diabetes induction with streptozotocin and high fat diet, both low density lipoprotein receptor (LDLR)-/- and apoE female mice were randomized to: AGE-LDL immunization with aluminum hydroxide (Alum) adjuvant; Alum alone; or PBS.
Results
AGE-LDL immunization: significantly reduced AS; induced specific plasma IgM and IgG antibodies; upregulated splenic Th2, Treg and IL-10 levels, without altering Th1 or Th17 cells; and increased serum high density lipoprotein(HDL) while numerically lowering HbA1c levels.
Conclusions
Subcutaneous immunization with AGE-LDL significantly inhibits atherosclerosis progression in hyperlipidemic diabetic mice possibly through activation of specific humoral and cell mediated immune responses and metabolic control improvement.