Epigenetics of neurological diseases.

Higher-order DNA structure and gene expression are governed by epigenetic processes like DNA methylation and histone modifications. Abnormal epigenetic mechanisms are known to contribute to the emergence of numerous diseases, including cancer. Historically, the chromatin abnormalities were only considered to be limited to discrete DNA sequences and were thought to be associated with rare genetic syndrome however, recent discoveries have pointed to genome-wide level changes in the epigenetic machinery which has contributed to a better knowledge of the mechanisms underlying developmental and degenerative neuronal problems associated with diseases such as Parkinson's disease, Huntington's disease, Epilepsy, Multiple sclerosis, etc. In the given chapter we describe the epigenetic alterations seen in various neurological disorders and further discuss the influence of these epigenetic changes on developing novel therapies.