TUBB6 and amyotrophic lateral sclerosis: Our analysis reveals the alteration of two major components of the neuronal cytoskeleton in the ALS motor cortex at the mRNA level, showing a general down-regulation of microtubules by pathway-based analysis and deregulation of two genes encoding tubulin beta (TUBB2A, TUBB6), as well as decreased expression of all three neurofilament subunits (NEFL, NEF3, NEFH).