Regulatory T-cell response to apolipoprotein B100-derived peptides reduces the development and progression of atherosclerosis in mice

  • Herbin O
  • Ait-Oufella H
  • Yu W
 et al. 
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OBJECTIVE: The immunoinflammatory response plays a critical role in the development and progression of atherosclerosis. Recent studies suggested an important role for regulatory T (Treg) cells in the inhibition of disease-related vascular inflammation. We hypothesized that induction of a specific Treg cell response to atherosclerosis-relevant antigens would be an attractive strategy to limit the development and progression of atherosclerosis through the promotion of immune tolerance.

METHODS AND RESULTS: Young or old Apoe-/- mice were subcutaneously infused for 2 weeks with either a control ovalbumin (OVA) peptide or with apolipoprotein B100 (ApoB100)-derived peptides without adjuvant. Atherosclerosis development, progression and immunologic status were assessed at 8 weeks after the end of the infusion. Treatment with ApoB100 peptides led to significant reduction of lesion development in young Apoe-/- mice (P=0.001 versus OVA group) and abrogated atherosclerosis progression in old Apoe-/- mice with already established lesions (0% progression in ApoB100 versus 17% in OVA group, P
CONCLUSION: Subcutaneous infusion of adjuvant-free ApoB100-derived peptides to Apoe-/- mice reduces atherosclerosis through the induction of a specific Treg cell response.

Author-supplied keywords

  • atherosclerosis
  • cytokines
  • immune system
  • leukotrienes

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