BAD and Huntington disease: Further co-immunoprecipitation study in spinal cord of HD-intoxicated rats with BMSC transplantation and in BMSC-CM/HD-treated VSC4.1 cells revealed the increased dissociation of the proapoptotic complex of Bad/Bcl-xL in the mitochondrial fraction by showing a decreased level of Bad that binds to Bcl-xL.