title: Circadian rhythmicity of plasma lipid peroxidation and antioxidants in oral squamous cell carcinoma.
abstract: BACKGROUND
  Oral cancer is one of the leading cancers in India accounting for 30 to 40 percent of all cancers. Disturbances in lipid peroxidation and antioxidants status have been implicated in the pathogenesis of several cancers including oral cancer. However, circadian disturbances of oxidants and antioxidants in oral cancer patients were not reported.
  
  
  METHODS
  The levels of plasma thiobarbituric acid reactive substances (TBARS), reduced glutathione (GSH) and activity of glutathione peroxidase (GPx) in ten oral cancer patients and an equal number of age-matched healthy subjects were assayed at every 6 hour intervals using colorimetric methods and their circadian characteristics were analysed using Cosinorwin computer software programme.
  
  
  RESULTS
  Alterations in mesor, amplitude, acrophase and r value of the chosen parameters were noticed.
  
  
  CONCLUSIONS
  The desynchronisation of plasma thiobarbituric acid reactive substances and the altered circadian characteristics of antioxidants observed in this study, may deserve further investigation for the early diagnosis, prognosis and for the efficacy of cancer chronotherapy.
authors.affiliation: Department of Biochemistry, Faculty of Science, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Manoharan
authors.forename: A A
authors.initials: AA
authors.lastname: Baskar
authors.forename: T
authors.initials: T
authors.lastname: Manivasagam
authors.forename: P
authors.initials: P
authors.lastname: Subramanian
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000503:physiopathology*; D002940:Circadian Rhythm / Q000502:physiology*; D003124:Colorimetry; D006801:Humans; D015227:Lipid Peroxidation / Q000502:physiology*; D009062:Mouth Neoplasms / Q000503:physiopathology*; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis
chemical_list: D017392:Thiobarbituric Acid Reactive Substances