BDNF and Huntington disease: Remarkably, cell cycle genes tend to be differentially expressed in human HD samples (p = 2 · 10-4), HD mouse models (R6/2: p = 6 · 10-4; BDNF-KO: p = 4 · 10-4), as well as a murine striatal cell line (p = 1 · 10-4).