Compared to SERT +/+ mice, SERT -/- mice evidenced a significant decrease in the expression of the non-edited (3.7% vs. 12.5%, p = 0.0003), D (3.7% vs.11.3%, p = 0.0117) and BD (4.6% vs.1.1%, p = 0.0356) isoforms. This evidence concerns the gene SLC6A4 and Behcet disease.