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Beta2-glycoprotein I and atherosclerosis.

D Harats¹, J George

¹Institute of Lipid and Atherosclerosis Research, Sheba Medical Center, Tel-Hashomer, Israel. dharats@post.tau.ac.il

Current Opinion in Lipidology

|September 19, 2001

Summary

Autoimmune responses to beta2-glycoprotein I (beta2GPI) accelerate atherosclerosis. Oral tolerance to beta2GPI reduces atherosclerotic lesions, suggesting its potential as an immunomodulator for plaque progression.

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Area of Science:

Immunology
Cardiovascular Science
Pathogenesis of Atherosclerosis

Background:

Atherosclerosis is a complex disease with multifactorial pathogenesis.
Autoimmune factors, including modified lipoproteins and heat shock proteins, are increasingly implicated in atherosclerosis.
Antiphospholipid antibodies, particularly anti-beta2-glycoprotein I (beta2GPI) antibodies, are associated with a procoagulant state and can activate immune cells.

Purpose of the Study:

To investigate the proatherogenic role of beta2-glycoprotein I (beta2GPI) and its associated immune responses.
To explore the potential of targeting beta2GPI for immunomodulation of atherosclerotic plaque progression.

Main Methods:

Inducing an immune response to beta2GPI in atherosclerosis-prone mice.
Analyzing the presence of beta2GPI and immune cells within atherosclerotic plaques (atheroma).
Transferring beta2GPI-reactive lymphocytes into LDL-receptor-deficient mice.
Inducing immunological tolerance to beta2GPI via oral antigen feeding.

Main Results:

Immune response induction to beta2GPI accelerated atherosclerosis in mice.
beta2GPI and immunopotent cells were abundant in atheroma.
Transfer of beta2GPI-reactive lymphocytes promoted fatty streak formation, confirming a proatherogenic role.
Oral tolerance to beta2GPI significantly reduced atherosclerotic lesion extent.

Conclusions:

beta2GPI is a key player in atherosclerotic plaque development and progression.
Antigen-specific immune reactions within atheroma can be exploited for selective immunomodulation.
beta2GPI serves as a potential target for immunomodulatory therapies to control plaque progression.

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