title: Correction of cellular phenotypes of Hutchinson-Gilford Progeria cells by RNA interference.
abstract: The great majority of cases of the Hutchinson-Gilford progeroid syndrome (HGPS) ("Progeria of Childhood'') are caused by a single nucleotide mutation (1824 C->T) in the LMNA gene which encodes lamin A and C, nuclear intermediate filaments that are important components of the nuclear lamina. The resultant mutant protein (Delta50 lamin A) is thought to act in a dominant fashion. We exploited RNA interference technology to suppress Delta50 lamin A expression, with the long range goal of intervening in the pathogenesis of the coronary artery atherosclerosis that typically leads to the death of HGPS patients. Short hairpin RNA (shRNA) constructs were designed to target the mutated pre-spliced or mature LMNA mRNAs, and were expressed in HGPS fibroblasts carrying the 1824 C->T mutations using lentiviruses. One of the shRNAs targeted to the mutated mRNA reduced the expression levels of Delta50 lamin A to 26% or lower. The reduced expression was associated with amelioration of abnormal nuclear morphology, improvement of proliferative potential, and reduction in the numbers of senescent cells. These findings provide a rationale for potential gene therapy.
authors.affiliation: Department of Pathology, University of Washington, Box 357470, HSB K-543, 1959 NE Pacific Ave, Seattle, WA, 98195-7470, USA.
authors.forename: Shurong
authors.initials: S
authors.lastname: Huang
authors.forename: Lishan
authors.initials: L
authors.lastname: Chen
authors.forename: Nataliya
authors.initials: N
authors.lastname: Libina
authors.forename: Joel
authors.initials: J
authors.lastname: Janes
authors.forename: George M
authors.initials: GM
authors.lastname: Martin
authors.forename: Judith
authors.initials: J
authors.lastname: Campisi
authors.forename: Junko
authors.initials: J
authors.lastname: Oshima
mesh_terms: D018929:Cell Culture Techniques; D002467:Cell Nucleus; D049109:Cell Proliferation; D016922:Cellular Senescence; D003324:Coronary Artery Disease / Q000235:genetics* / Q000503:physiopathology; D005347:Fibroblasts; D020869:Gene Expression Profiling; D015316:Genetic Therapy; D006801:Humans; D034904:Lamin Type A / Q000235:genetics* / Q000502:physiology; D010641:Phenotype; D017354:Point Mutation; D011371:Progeria / Q000235:genetics* / Q000473:pathology*; D034622:RNA Interference
chemical_list: C494847:LMNA protein, human; D034904:Lamin Type A