title: Chemiluminescence assay of reactive oxygen species in laryngeal cancer.
abstract: OBJECTIVE
  This study aimed to evaluate the presence of reactive oxygen species in laryngeal cancer tissue, using a luminol-amplified chemiluminescence method.
  
  
  METHODS
  Fourteen patients with histopathologically diagnosed laryngeal squamous cell carcinoma were enrolled. Patients with recurrent tumours or a history of prior chemotherapy or radiotherapy were excluded. Tissue specimens were harvested both from the tumour itself and from the neighbouring, apparently normal mucosa (immediately after tumour removal). Tissue specimens were washed with ice-cold saline solution and processed immediately, without storage. The level of reactive oxygen species was measured quantitatively by a luminol-amplified chemiluminescence method.
  
  
  RESULTS
  The mean luminol-amplified chemiluminescence values for tumour and control tissue were 140.52 (standard error of the mean 40.21) and 121.36 (standard error of the mean 35.33) relative light units/mg tissue, respectively. Furthermore, mean tumour and control luminol chemiluminescence values were compared for stage one and two tumours versus stage three and four tumours. Both the tumour and the control luminol chemiluminescence values for the latter tumour group were significantly higher than those for the former tumour group.
  
  
  CONCLUSIONS
  This study measured directly the levels of reactive oxygen species in samples of laryngeal cancer tissue and normal mucosa. Higher levels of reactive oxygen species were found in laryngeal cancer tissue, suggesting a relationship between reactive oxygen species and laryngeal cancer.
authors.affiliation: Department of Otolaryngology Head Neck Surgery, School of Medicine, Gaziantep University, Gaziantep, Turkey. tekinbaglam@hotmail.com
authors.forename: T
authors.initials: T
authors.lastname: Baglam
authors.forename: M
authors.initials: M
authors.lastname: Sari
authors.forename: Z
authors.initials: Z
authors.lastname: Mine Yazici
authors.forename: M
authors.initials: M
authors.lastname: Yuksel
authors.forename: C
authors.initials: C
authors.lastname: Uneri
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000378:metabolism* / Q000473:pathology; D005260:Female; D006801:Humans; D007820:Laryngeal Mucosa / Q000378:metabolism; D007822:Laryngeal Neoplasms / Q000378:metabolism* / Q000473:pathology; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D018384:Oxidative Stress / Q000502:physiology*; D017382:Reactive Oxygen Species / Q000378:metabolism*
chemical_list: D017382:Reactive Oxygen Species; D008165:Luminol