title: Enhanced lipid peroxidation and nitric oxide products with deranged antioxidant status in patients with head and neck squamous cell carcinoma.
abstract: Reactive oxygen species (ROS) and reactive nitrogen species (RNS) can function both as initiators and promoters in carcinogenesis. Antioxidants provide protection against cellular and molecular damage caused by ROS and RNS. We conducted a study to evaluate the levels of lipid peroxidation products, nitric oxide (NO) products and antioxidants in patients with head and neck squamous cell carcinoma (HNSCC). Fifty one HNSCC patients, 33 healthy tobacco smokers/chewers as tobacco user controls, and 37 non-smokers/chewers as normal controls were recruited for this study. Lipid peroxidation products, NO products and antioxidants were measured using spectrophotometric methods. Lipid peroxidation products, including lipid hydroperoxide (LHP) and malondialdehyde (MDA), nitric oxide (NO) products, including nitrite (NO(2)(-)), nitrate (NO(3)(-)), and total nitrite (TNO(2)(-)) were found to be significantly elevated with a concomitant depletion of antioxidants in HNSCC patients as compared to tobacco users and normal controls. These derangements were also evident albeit to a lesser degree in tobacco users as compared to normal controls. Results from this study demonstrate a potential involvement of both ROS and RNS in the pathogenesis of HNSCC and also illustrate the risk of ROS/RNS induced damage healthy tobacco users are exposed to, implicating their higher risk for upper aerodigestive tract cancer.
authors.affiliation: Department of Surgical Oncology, Government Royapettah Hospital, Chennai 600 014, Tamil Nadu, India.
authors.forename: Muzib Hassanal
authors.initials: MH
authors.lastname: Rasheed
authors.forename: Syed Sultan
authors.initials: SS
authors.lastname: Beevi
authors.forename: Arumugam
authors.initials: A
authors.lastname: Geetha
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000097:blood; D002294:Carcinoma, Squamous Cell / Q000378:metabolism*; D002374:Catalase / Q000097:blood; D005260:Female; D005978:Glutathione / Q000097:blood; D005979:Glutathione Peroxidase / Q000097:blood; D006258:Head and Neck Neoplasms / Q000378:metabolism*; D006801:Humans; D015227:Lipid Peroxidation; D008054:Lipid Peroxides / Q000097:blood; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D008875:Middle Aged; D009566:Nitrates / Q000097:blood; D009569:Nitric Oxide / Q000378:metabolism*; D009573:Nitrites / Q000097:blood; D026361:Reactive Nitrogen Species / Q000097:blood*; D017382:Reactive Oxygen Species / Q000097:blood*; D012907:Smoking / Q000378:metabolism; D013481:Superoxides / Q000097:blood; D024502:alpha-Tocopherol / Q000097:blood
chemical_list: D000975:Antioxidants; D008054:Lipid Peroxides; D009566:Nitrates; D009573:Nitrites; D026361:Reactive Nitrogen Species; D017382:Reactive Oxygen Species; D013481:Superoxides; D009569:Nitric Oxide; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D005978:Glutathione; D024502:alpha-Tocopherol; D001205:Ascorbic Acid