title: Telomere shortening and ionizing radiation: a possible role in vascular dysfunction?
abstract: OBJECTIVE
  In recent years, growing epidemiological evidence has linked ionizing radiation exposure to cardiovascular atherosclerotic disease. However, there are still major gaps in the knowledge of the molecular mechanisms of radiation-induced vascular disease, especially for low-dose levels. Telomeres, repetitive DNA sequences of (TTAGGG)(n) located at the ends of eukaryotic chromosomes, play a role in regulating vascular aging, and shorter leukocyte telomere length has been demonstrated to predict cardiovascular disease and mortality. There is also evidence supporting the crucial role of telomeres in the formation of chromosome and chromatid aberrations induced by ionizing radiation.
  
  
  CONCLUSIONS
  The purpose of the present paper is to review the recent advances in the biological mechanisms determining telomere length erosion after ionizing radiation exposure as well as to examine the hypothesis that telomere shortening may be the crucial mediator leading to detrimental vascular effects after ionizing radiation exposure.
authors: Institute of Clinical Physiology , National Research Council (C.N.R.), Pisa, Italy. laura.sabatino@ifc.cnr.it
authors: Laura
authors: L
authors: Sabatino
authors: Eugenio
authors: E
authors: Picano
authors: Maria Grazia
authors: MG
authors: Andreassi
mesh_terms: D000818:Animals; D006801:Humans; D008955:Models, Cardiovascular; D008957:Models, Genetic; D016615:Telomere / Q000235:genetics* / Q000528:radiation effects*; D059506:Telomere Shortening / Q000235:genetics* / Q000528:radiation effects*; D014652:Vascular Diseases / Q000209:etiology / Q000235:genetics*