Rôle des lymphocytes B dans le développement de l’athérosclérose
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28 | La Lettre du Cardiologue • n° 451 - janvier 2012
Lymphocytes B
Lymphocytes T pathogènes Th1
Cellules présentatrices
d’antigènes
IgG anti-LDLox
IgM anti-LDLox protecteurs
LDLox
IL-5
Th2
B1
Figure 3. Les lymphocytes B1, stimulés par la voie Th2, produisent des anticorps protecteurs
anti-LDLox. D’autres types lymphocytaires B activent et polarisent les lymphocytes T et les
cellules présentatrices d’antigènes vers un phénotype pro-inflammatoire proathérogène.
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Références bibliographiques
(lymphocytes T CD4⁺) jouent un rôle majeur à la
fois dans le développement et dans les complica-
tions de la maladie. Les lymphocytes de type B1,
et les anticorps IgM anti-LDLox qu’ils produisent,
sont protecteurs. Des données récentes suggèrent
que d’autres types lymphocytaires B favorisent le
développement de l’athérosclérose en activant et en
polarisant les lymphocytes T CD4⁺ vers un phénotype
pro-inflammatoire proathérogène. ■