Cited by 115Nuclear Structure and FunctionDNA Repair MechanismsTelomeres, Telomerase, and Senescence

Involvement of xeroderma pigmentosum group A (XPA) in progeria arising from defective maturation of prelamin A

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Liu, Yiyong, Wang, Youjie, Rusinol, Antonio E., Sinensky, Michael S., Liu, Ji, Shell, Steven M., Zou, Yue·2008·The FASEB Journal

Abstract

Cellular accumulation of DNA damage has been widely implicated in cellular senescence, aging, and premature aging. In Hutchinson‐Gilford progeria syndrome (HGPS) and restrictive dermopathy (RD), premature aging is linked to accumulation of DNA double‐strand breaks (DSBs), which results in genome instability. However, how DSBs accumulate in cells despite the presence of intact DNA repair proteins remains unknown. Here we report that the recruitment of DSB repair factors Rad50 and Rad51 to the DSB sites, as marked by γ‐H2AX, was impaired in human HGPS and Zmpste24‐deficient cells. Consistently, the progeria‐associated DSBs appeared to be unrepairable although DSBs induced by camptothecin were efficiently removed in the progeroid cells. We also found that these progeroid cells exhibited nuclear foci of xeroderma pigmentosum group A (XPA), a unique nucleotide excision repair protein. Strikingly, these XPA foci colocalized with the DSB sites in the progeroid cells. This XPA‐DSB association was further confirmed and found to be mediated by DNA, using a modified chromatin immunoprecipitation assay and coimmunoprecipitation. RNA interference (RNAi) knockdown of XPA in HGPS cells partially restored DSB repair as evidenced by Western blot analysis, immunofluorescence and comet assays. We propose that the uncharacteristic localization of XPA to or near DSBs inhibits DSB repair, thereby contributing to the premature aging phenotypes observed in progeria arising from genetic defects in prelamin A maturation.—Liu, Y., Wang, Y., Rusinol, A. E., Sinensky, M. S., Liu, J., Shell, S. M., Zou, Y. Involvement of xeroderma pigmentosum group A (XPA) in progeria arising from defective maturation of prelamin A. FASEB J. 22, 603–611 (2008)

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Crossref · 10.1096/fj.07-8598com

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Authors
Liu, Y., Wang, Y., Rusinol, A. E., Sinensky, M. S., Liu, J., Shell, S. M., & Zou, Y.
Affiliations
  • East Tennessee State University (US)
  • Department of Biochemistry and Molecular Biology James H. Quillen College of Medicine East Tennessee State University Johnson City Tennessee USA
Venue
The FASEB Journal
Publisher
Wiley
Published
2007-09-11
Volume
22
Issue
2
Pages
603-611
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2083296702
Cited by
115
References
46
Citations by year
2025: 5 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 4 · 2020: 2 · 2019: 3 · 2018: 8 · 2017: 8 · 2016: 8 · 2015: 9 · 2014: 8 · 2013: 9 · 2012: 5
FWCI
2.12
Type
journal article
Language
en
Open access
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Commons - East Tennessee State University (East Tennessee State University) (submittedVersion)
Funders
  • National Institutes of Health (CA-86927)
  • National Cancer Institute
  • Progeria Research Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
Keywords
XPA, Hutchinson-Gilford progeria syndrome, restrictive dermopathy, premature aging, DNA double-strand break repair, ZMPSTE24, RAD50, RAD51, γH2AX, nucleotide excision repair, DNA repair deficiency, genomic instability
MeSH terms
Cells, Cultured, DNA, DNA Damage, DNA Repair, Humans, Nuclear Proteins, Progeria, Protein Binding, Protein Precursors, RNA Interference, Lamin Type A, Xeroderma Pigmentosum Group A Protein

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