IL6 and congenital rubella syndrome: ,65,66 Interestingly, the treatment with Allo/U15BCAR-NKT cells, in contrast to BCAR-T cells, led to a reduction in the levels of CRS-related biomarkers, such as IL-6 and serum amyloid A-3 (SAA-3), in the serum (Figures 8C and 8D).64