DCTN1 and Behcet disease: For the DCTN1 splice site variant, and the predicted resulting formation of ct-p150Glued and/or NMD, to be considered with any seriousness as being causally related to BD, it would have to satisfy a major requirement: it would need to be strongly correlated with BD prophylactic drugs, antipsychotics, and antidepressants, all of which are commonly used in the treatment of BD.