Klinički značaj izraženosti gena BORIS i MYC u karcinomu pločastih stanica hipofarinksa [Clinical significance of BORIS and MYC expression in hypopharyngeal squamous cell carcinoma]

Rašić, Ivan (2017) Klinički značaj izraženosti gena BORIS i MYC u karcinomu pločastih stanica hipofarinksa [Clinical significance of BORIS and MYC expression in hypopharyngeal squamous cell carcinoma]. PhD thesis, Sveučilište u Zagrebu.

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Abstract

Hypopharyngeal squamous cell carcinoma belongs to malignant diseases with dismal prognosis. The most prominent risk factors for this type of cancer are known to cause global DNA hypomethylation and activate cancer-related genes. BORIS is often aberrantly activated in cancer and is involved in activation of MYC transcription. The expression of BORIS and MYC was investigated in retrospective study of 59 hypopharyngeal carcinoma samples. BORIS and MYC expression was analyzed regarding to conventional prognostic factors: tumor size, lymph node involvement and the degree of tumor differentiation. The influence of BORIS and MYC expression on five-year survival rate was analyzed. Two detected BORIS transcript variants, BORISd and BORISk, were expressed in 33.9% and 76.3% of tumor analyzed tumors. The expression of both BORIS transcript variants significantly influenced the five-year survival rate (BORISd, p=0,001; BORISk, p=0,011). BORIS protein was detected in 42.4% of tumor samples and its expression had no impact on patients survival rate. The expression of MYC, regardless of its subcellular localization had no influence on patients survival. Multivariate analysis by recursive partitioning profiled BORISd expression as most powerful prognostic factor in this type of cancer.

Abstract in Croatian

Karcinom pločastih stanica hipofarinksa pripada skupini zloćudnih bolesti s lošom prognozom. Glavni čimbenici rizika za nastanak ove bolesti dovode do globalne hipometilacije DNA i posljedične aktivacije gena uključenih u zloćudnu preobrazbu. U zloćudnim tumorima dolazi do aktivacije gena BORIS, što se povezuje sa promjenama u aktivnosti gena MYC. Provedeno je retrospektivno istraživanje izraženosti gena i proteina BORIS i MYC na 59 uzoraka karcinoma pločastih stanica hipofarinksa. Analizirana je povezanost izraženosti istraživanih transkripata i proteina sa klasičnim prognostičkim pokazateljima: veličinom tumora, zahvaćenošću limfnih čvorova i diferencijacijom tumora. Provedena je analiza utjecaja izraženosti transkripata i proteina BORIS i MYC na petogodišnje preživljenje oboljelih od karcinoma pločastih stanica hipofarinksa. Pronađene su dvije transkripcijske inačice gena BORIS, izražene u 33,9% (BORISd) i 76,3% (BORISk) uzoraka, koje su statistički značajno utjecale na petogodišnje preživljenje oboljelih (BORISd, p=0,001; BORISk, p=0,011). Protein BORIS je pokazan u 42,4% tumora i nije imao utjecaj na preživljenje, kao niti protein MYC, bez obzira na unutarstanični smještaj. Multivarijatnom analizom podataka metodom rekurzivnog particioniranja pokazano je da izraženost transkripcijske inačice BORIS d najsnažniji prognostički pokazatelj rizika od smrtnog ishoda oboljelih od ove vrste tumora.

Item Type: Thesis (PhD)
Mentors:
Mentor
Novak Kujundžić, Renata
Ivkić, Mirko
Departments: Izvan medicinskog fakulteta
Depositing User: Anja Majstorović
University: Sveučilište u Zagrebu
Institution: Medicinski fakultet
Number of Pages: 112
Status: Unpublished
Creators:
CreatorsEmail
Rašić, IvanUNSPECIFIED
Date: 27 September 2017
Date Deposited: 17 Jan 2019 10:59
Last Modified: 17 Jan 2019 11:07
Subjects: /
Related URLs:
    URI: http://medlib.mef.hr/id/eprint/3058

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