RT-qPCR analysis of peripheral blood mononuclear cells (PBMC)-derived subsets from healthy donors (HD) revealed that myeloid cells (marked by the expression of CD33) showed significantly higher TMEM173 expression with a ΔCt of 14.52 ± 0.14 compared to the analyzed subpopulations of T lymphocytes (Figure 2A). Here, CD33 is linked to Huntington disease.