title: Chronomics of circulating plasma lipid peroxides and anti-oxidant enzymes and other related molecules in cirrhosis of liver. In the memory of late Shri Chetan Singh.
abstract: BACKGROUND
  The chronome (from chronos, time, and nomos, rule; time structure) of lipid peroxidation and anti-oxidant defense mechanisms may relate to the efficacy and management of preventive and curative chronotherapy.
  
  
  METHODS
  Thirty patients with liver cirrhosis, 25-45 years of age, and 60 age-matched clinically healthy volunteers were synchronized for 1 week with diurnal activity from about 06:00 to about 22:00 and nocturnal rest. Breakfast was around 08:30, lunch around 13:30 and dinner around 20:30. Drugs known to affect the free-radical system were not taken. Blood samples were collected at 6-h intervals for 24 h under standardized, presumably 24-h synchronized conditions. Determinations included plasma lipid peroxides, in the form of malondialdehyde (MDA), blood superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR) activities, and serum total protein, albumin, ascorbic acid, and uric acid concentrations.
  
  
  RESULTS
  A marked circadian variation was demonstrated for each variable in each group by population-mean cosinor (P < 0.01). In addition to anticipated differences in overall mean value (MESOR), patients differed from healthy volunteers also in terms of their circadian pattern.
  
  
  CONCLUSIONS
  Mapping the broader time structure (chronome) with age and multifrequency rhythm characteristics of antioxidants and pro-oxidants is needed for exploring their putative role as markers in the treatment and management of liver cirrhosis.
authors.affiliation: Departments of Biochemistry and Medicine, Chhatrapati Shahuji Maharaj Medical University (Upgraded King George Medical College), Lucknow 226003, India.
authors.forename: R
authors.initials: R
authors.lastname: Singh
authors.forename: R K
authors.initials: RK
authors.lastname: Singh
authors.forename: A K
authors.initials: AK
authors.lastname: Tripathi
authors.forename: G
authors.initials: G
authors.lastname: Cornélissen
authors.forename: O
authors.initials: O
authors.lastname: Schwartzkopff
authors.forename: K
authors.initials: K
authors.lastname: Otsuka
authors.forename: F
authors.initials: F
authors.lastname: Halberg
mesh_terms: D000328:Adult; D000375:Aging / Q000502:physiology; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000097:blood; D015415:Biomarkers; D002374:Catalase / Q000097:blood; D002909:Chronobiology Phenomena; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood; D005980:Glutathione Reductase / Q000097:blood; D006801:Humans; D008054:Lipid Peroxides / Q000097:blood*; D008103:Liver Cirrhosis / Q000097:blood* / Q000201:enzymology; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D008875:Middle Aged; D013482:Superoxide Dismutase / Q000097:blood
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D008054:Lipid Peroxides; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase; D001205:Ascorbic Acid