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Pneumococcal vaccination decreases atherosclerotic lesion formation.

Vaccine Weekly

| August 13, 2003 | COPYRIGHT 2003 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2003 AUG 13 - (NewsRx.com & NewsRx.net) -- Pneumococcal vaccination decreased atherosclerotic lesion formation, indicating molecular mimicry between Streptococcus pneumoniae and oxidized LDL.

According to a study from the United States, "During the progression of atherosclerosis, autoantibodies are induced to epitopes of oxidized low-density lipoprotein (oxLDL) and active immunization of hypercholesterolemic mice with oxLDL ameliorates atherogenesis. We unexpectedly found that many autoantibodies to oxLDL derived from 'naive' atherosclerotic mice share complete genetic and structural identity with antibodies from the classic anti-phosphorylcholine B-cell clone, T15, which protect against common infectious pathogens, including pneumococci."

"To investigate whether in vivo exposure to pneumococci can affect atherogenesis, we immunized Ldlr-/- mice with Streptococcus pneumoniae," stated Chritoph J. Binder and colleagues at the University of California-San Diego. "This induced high circulating levels of oxLDL-specific IgM and a persistent expansion of oxLDL-specific T15 IgM-secreting B cells primarily in the spleen, which were cross-reactive with pneumococcal determinants. Pneumococcal immunization decreased ...

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