title: Diminution of hepatic response to 7, 12-dimethylbenz(α)anthracene by ethyl acetate fraction of Acacia catechu willd. through modulation of xenobiotic and anti-oxidative enzymes in rats.
abstract: BACKGROUND
  Liver is the primary metabolizing site of body and is prone to damage by exogenous as well as endogenous intoxicants. Polycyclic aromatic hydrocarbons such as 7, 12- dimethylbenz(α)anthracene (DMBA) is an exogenous hepatotoxin, which is well known for modulating phase I, II and anti-oxidative enzymes of liver. Plants contain plethora of polyphenolic compounds which can reverse the damaging effect of various xenobiotics. The present study investigated protective role of the ethyl acetate fraction of Acacia catechu Willd. (EAF) against DMBA induced alteration in hepatic metabolizing and anti-oxidative enzymes in rats.
  
  
  RESULTS
  The rats were subjected to hepatic damage by treating with DMBA for 7 weeks on alternative days and treatment schedule was terminated at the end of 14 weeks. The rats were euthanized at the end of protocol and livers were homogenized. The liver homogenates were used to analyse phase I (NADPH-cytochrome P450 reducatse, NADH-cytochrome b5 reductase, cytochrome P420, cytochrome b5), phase II (glutathione-S-transferase, DT diaphorase and γ-Glutamyl transpeptidase) and antioxidative enzymes (catalase, superoxide dismutase, ascorbate peroxidase, glutathione reductase, guiacol peroxidase and lactate dehydrogenase). Furthermore, other oxidative stress parameters (thiobarbituric acid reactive substances, lipid hydroperoxides and conjugated dienes and reduced glutathione) and liver marker enzymes (serum glutamic oxaloacetic transaminase, serum glutamic pyruvic transaminase and alkaline phosphatase) were also studied. The DMBA induced significant changes in activity of hepatic enzymes that was reversed by treatment with three dose levels of EAF.
  
  
  CONCLUSIONS
  It is concluded that EAF affords hepato-protection against DMBA in rats through modulation of phase I, II and anti-oxidative enzymes.
authors.affiliation: Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India.
authors.forename: Rajbir
authors.initials: R
authors.lastname: Kaur
authors.affiliation: Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India.
authors.forename: Amrit Pal
authors.initials: AP
authors.lastname: Singh
authors.affiliation: Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, India.
authors.forename: Saroj
authors.initials: S
authors.lastname: Arora
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000633:toxicity*; D000045:Acacia / Q000737:chemistry*; D000085:Acetates; D000818:Animals; D005260:Female; D008099:Liver / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism*; D050216:Metabolic Detoxication, Phase I / Q000502:physiology; D050217:Metabolic Detoxication, Phase II / Q000502:physiology; D018384:Oxidative Stress / Q000187:drug effects*; D010936:Plant Extracts / Q000737:chemistry; D051381:Rats; D015262:Xenobiotics / Q000378:metabolism*
chemical_list: D000085:Acetates; D010936:Plant Extracts; D015262:Xenobiotics; D015127:9,10-Dimethyl-1,2-benzanthracene; C007650:ethyl acetate