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Remodelin Nuclear Defects
Deregulation of A-type lamin proteins leads to disorganization of chromatin structure and misshapen nuclei, which are believed to underlie the pathologies of various human diseases, including the premature aging disorder Hutchinson Gilford progeria syndrome (HGPS) and various cancers. Larrieu et al. (p. 527) developed a small molecule, Remodelin, that not only improved nuclear shape defects of human lamin A/C–depleted cells, HGPS cells, and aged normal cells, but also decreased the levels of a DNA damage marker and improved global cellular fitness.
Abstract
Down-regulation and mutations of the nuclear-architecture proteins lamin A and C cause misshapen nuclei and altered chromatin organization associated with cancer and laminopathies, including the premature-aging disease Hutchinson-Gilford progeria syndrome (HGPS). Here, we identified the small molecule “Remodelin” that improved nuclear architecture, chromatin organization, and fitness of both human lamin A/C–depleted cells and HGPS-derived patient cells and decreased markers of DNA damage in these cells. Using a combination of chemical, cellular, and genetic approaches, we identified the acetyl-transferase protein NAT10 as the target of Remodelin that mediated nuclear shape rescue in laminopathic cells via microtubule reorganization. These findings provide insights into how NAT10 affects nuclear architecture and suggest alternative strategies for treating laminopathies and aging.
