title: Influence of ferulic acid on gamma-radiation induced DNA damage, lipid peroxidation and antioxidant status in primary culture of isolated rat hepatocytes.
abstract: Ionizing radiation is known to induce oxidative stress through generation of reactive oxygen species (ROS) resulting in imbalance of the pro-oxidant and antioxidant activities ultimately resulting in cell death. Ferulic acid (FA) is a phytochemical commonly found in fruits and vegetables such as tomatoes, sweet corn, and ricebran. FA exhibit a wide range of pharmacological effects including antiageing, anti-inflammatory, anticancer, antidiabetic, antiapoptotic, and neuroprotective. The present work is aimed at evaluating the radioprotective effect of FA, on gamma-radiation induced toxicity in primary cultures of isolated rat hepatocytes. Hepatocytes were isolated from the liver of rats by collagenase perfusion. The cellular changes were estimated using lipid peroxidative indices like thiobarbituric acid reactive substances (TBARS), the antioxidants superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and reduced glutathione (GSH), ceruloplasmin, Vitamins A, E and C and uric acid. DNA damage was analyzed by single cell gel electrophoresis (comet assay). An increase in the severity of DNA damage was observed with increasing dose (1, 2 and 4Gy) of gamma-radiation in cultured hepatocytes. TBARS were increased significantly, whereas the levels of GSH, Vitamins C, E and A, ceruloplasmin, uric acid and antioxidant enzymes were significantly decreased in gamma-irradiated groups. The maximum damage to hepatocytes was observed at 4Gy irradiation. Pretreatment with FA (1, 5 and 10 microg/ml) significantly decrease the levels of TBARS and DNA damage. In addition, pretreatment with FA significantly increased antioxidant enzymes, GSH, Vitamins A, E and C, uric acid and ceruloplasmin levels. The maximum protection of hepatocytes was observed at 10 microg/ml of FA pretreatment. Thus, pretreatment with FA helps in protecting the hepatocytes against gamma-radiation induced cellular damage and can be developed as a effective radioprotector during radiotherapy.
authors.affiliation: Department of Biochemistry, Faculty of Science, Annamalai University, Annamalainagar 608002, Tamil Nadu, India. srinimarimuthu@gmail.com <srinimarimuthu@gmail.com>
authors.forename: M
authors.initials: M
authors.lastname: Srinivasan
authors.forename: A Ram
authors.initials: AR
authors.lastname: Sudheer
authors.forename: K Raveendran
authors.initials: KR
authors.lastname: Pillai
authors.forename: P Raghu
authors.initials: PR
authors.lastname: Kumar
authors.forename: P R
authors.initials: PR
authors.lastname: Sudhakaran
authors.forename: V P
authors.initials: VP
authors.lastname: Menon
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002469:Cell Separation; D002478:Cells, Cultured; D002570:Ceruloplasmin / Q000378:metabolism; D020552:Comet Assay; D003373:Coumaric Acids / Q000494:pharmacology*; D004249:DNA Damage / Q000187:drug effects* / Q000528:radiation effects*; D005720:Gamma Rays; D005978:Glutathione / Q000378:metabolism; D022781:Hepatocytes / Q000187:drug effects / Q000378:metabolism* / Q000528:radiation effects; D015227:Lipid Peroxidation / Q000187:drug effects* / Q000528:radiation effects*; D051381:Rats; D017392:Thiobarbituric Acid Reactive Substances; D014527:Uric Acid / Q000378:metabolism; D014815:Vitamins / Q000378:metabolism
chemical_list: D000975:Antioxidants; D003373:Coumaric Acids; D017392:Thiobarbituric Acid Reactive Substances; D014815:Vitamins; D014527:Uric Acid; C004999:ferulic acid; D002570:Ceruloplasmin; D005978:Glutathione