The original version of the Supplementary Information associated with this article contained an error in Supplementary Fig. 4a. The representative image shown in Supplementary Fig. 4a from the Apoe–/– mouse treated with SB-3CT was incorrect. The adjacent negative no IgG-stained control brain section (lectin-stained only) from the same Apoe–/– vehicle treated animal was mistakenly used for this panel during preparation of the manuscript. The correct version of Supplementary Fig. 4a, shown in Fig.