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CCR5 is specifically needed for CD4 T-cell homing to the atherosclerotic plaques. CCR5(+)CD4 T cells express an unusual combination of transcription factors, FoxP3 and T-bet. Although CCR5Teff express FoxP3, we showed that they are not regulatory and adoptive transfer of these cells exacerbates atherosclerosis.
Li et al. (Tue,) studied this question.