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The assessment of gene expression profile in laryngeal cancer shall allow to implement molecular biology methods in diagnostics, as well as in prognosis of the course of disease. Thus, it may influence the choice of the most optimal decisions in regards to the method of treatment, extent of surgical procedure, or the necessity of adding post-operative radiotherapy. The aim of the project was to analyse the gene expression profile of laryngeal cancer using oligonucleotide microarrays, aiming to derive novel molecular markers for that carcinoma. The study comprised a group of 14 patients (12 males and 2 females) with squamous cell laryngeal carcinoma, diagnosed and surgically treated between 2005 – 2007 in the ENT Department of the Silesian Medical University in Katowice, Poland. RNA was isolated from frozen tissue fragments. To assess gene expression profile, high density oligonucleotide microarrays (Affymetrix U 133 Plus 2.0) were applied, with over 54 thousand probesets for over 47 thousand transcripts. Four genes, previously not assesed in diagnostic context in laryngeal carcinoma, seemed to be valuable markers of that neoplasm. These are: metalloproteinase ADAM12, cycline-dependent kinase 2 - CDK2, kinesine 14 - KIF14, suppressor 1 of checkpoint - CHES1.
HPV DNA was amplified by the nested-PCR method to identify E6/E7 HPV 16 from 72 deep-frozen (-70°C) specimens of LSCC tumours collected after a total laryngectomy. HPV was identified in 38.9% of the specimens. There was no statistically significant correlation between the presence of HPV and epidemiological, clinical, and pathological features, and recurrence. There was no statistically significant correlation between the presence of HPV and survival. HPV infection is not likely to influence survival rates as an independent prognostic factor in patients with laryngeal cancer. The presence of HPV infection in 38.9% of the cases suggest a possible role in the aetiology of laryngeal cancer and support the role of high-risk types of HPV 16 in LSCC.
Aim: Selenium (Se) is of fundamental importance to health conditions. Also, the concentration of Se in human organism depends on dietary intakes. The aim of this study was to analyze the influence of dietary preferences on serum and tissue levels of Se in patients with laryngeal cancer. Methods: Twenty eight patients who had undergone an operation on laryngeal cancer, were studied. Food frequency questionnaires were implemented to collect the dietary> data Serum and tissue levels of Se were determined using atomic absorption spectrometry. Results: In patients with laryngeal cancer the mean Se concentration in serum (38.73±13.9 µg/L) and cancer tissue (94.00± 92.7 ng/g) were significantly lower than in controls (52.56 ±12.8 µg/L and 174.01±120.9 ng/g, accordingly). Smoking and using butter on bread decreased Se levels in tissue of cancer sufferers. Frequent consumption of pork-butcher 's meat increased of Se concentration in serum and cancer tissue, but honey only in serum. Conclusion: Se levels in patients with laryngeal cancer may depend not only on the health condition, but also on the habit of eating pork-butcher 's meat, butter and honey. It can also depend on the fact if a patient smokes or not.
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