Ubiquitination and DNA Repair in Multiple Myeloma

Multiple myeloma (MM) is a hematological neoplasm characterized by the clonal pro- liferation of malignant plasma cells in the bone marrow. MM cells are characterized by genomic abnormalities that arise during the pathogenesis of disease and accumulate during progression. DNA repair pathways are critical to repair the plethora of DNA lesions that occur in MM, and deregulation of these pathways is implicated in disease onset and survival. The ubiquitin proteasome system has emerged as a central player in the regulation of DNA damage response (DDR). In this chapter, we review defects within the ubiquitin proteasome system that are associated with abnormal DNA damage response in MM and discuss current and potential novel ways of targeting these aberra- tions in the clinic.