Furthermore, in both FMT-Lpr mice and FMT-Mpj mice, the CD8 + T-cell percentages were decreased in the small intestine, and the CD4 + T-cell percentages were reduced in the large intestine compared with those of FMT-PBS mice (Figure S3E-F), indicating that the altered tendencies of T lymphocytes are FMT-related instead of lupus-related. Here, CD4 is linked to systemic lupus erythematosus.