title: Transcriptional response to ionizing radiation in human radiation sensitive cell lines.
abstract: OBJECTIVE
  Radiation is a common treatment of cancer, but some patients show severe side effects when exposed to small doses of radiation. The aim of this study was to explore the underlying cause of radiation sensitivity in a group of radiation sensitive patients.
  
  
  METHODS
  Lymphoblastoid cell lines from 5 normal individuals, 4 Ataxia Telangiectasia (AT), and 12 non-AT radiation sensitive (RS) patients were irradiated. RNA was isolated before and after radiation and hybridized to 15k cDNA microarrays and gene expression was recorded.
  
  
  CONCLUSIONS
  The RS cell lines showed an expression phenotype different from both the AT and normal cell lines. Six of the RS cell lines had a distinct expression profile before radiation. This implies that the RS patients are a heterogeneous group, but that six of the patients may have a common cause of radiation sensitivity.
authors.affiliation: Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, Norway. hblandma@rr-research.no
authors.forename: H
authors.initials: H
authors.lastname: Landmark
authors.forename: S A
authors.initials: SA
authors.lastname: Nahas
authors.forename: J
authors.initials: J
authors.lastname: Aarøe
authors.forename: R
authors.initials: R
authors.lastname: Gatti
authors.forename: A-L
authors.initials: AL
authors.lastname: Børresen-Dale
authors.forename: O K
authors.initials: OK
authors.lastname: Rødningen
mesh_terms: D001260:Ataxia Telangiectasia / Q000473:pathology; D064007:Ataxia Telangiectasia Mutated Proteins; D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism*; D002460:Cell Line; D045744:Cell Line, Tumor; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D017346:Protein Serine-Threonine Kinases / Q000235:genetics / Q000378:metabolism*; D012313:RNA / Q000096:biosynthesis; D011836:Radiation Tolerance; D011839:Radiation, Ionizing; D012016:Reference Values; D014158:Transcription, Genetic / Q000528:radiation effects*; D025521:Tumor Suppressor Proteins / Q000235:genetics / Q000378:metabolism*
chemical_list: D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D025521:Tumor Suppressor Proteins; D012313:RNA; C576324:ATM protein, human; D064007:Ataxia Telangiectasia Mutated Proteins; D017346:Protein Serine-Threonine Kinases