CXCR4 and Huntington disease: To assess the expression of chemokine receptors, fresh and 24 h-whole blood (WB) cultured monocytes from CD patients and HD were stained with anti-CD14, anti-CD16 and anti-CCR2, CCR5, CXCR4, and CX3CR1 and were analyzed by flow cytometry (Supplementary Fig. S1).