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Title:Optimizacija protokola za pripravo beljakovin iz celičnih frakcij celične linije FaDu za proteomsko analizo na masnem spektrometru : magistrsko delo
Authors:ID Polak, Jan (Author)
ID Potočnik, Uroš (Mentor) More about this mentor... New window
ID Büdefeld, Tomaž (Comentor)
Files:.pdf MAG_Polak_Jan_2022.pdf (5,01 MB)
MD5: 1C306033A91C063378907613B1BD442A
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Rak glave in vratu (angl. Head and Neck Cancer, HNC) predstavlja raznoliko skupino rakov, med katere uvrščamo rake ustne in nosne votline, grla in žrela. Kljub napredku pri razumevanju genetskih dejavnikov, dejavnikov okolja, molekularnih in celičnih mehanizmov, ki sodelujejo pri nastanku raka glave in vratu, so rezultati trenutno odobrenih načinov zdravljenja, po stopnji ponovitve bolezni in umrljivosti, zelo zaskrbljujoči. Po številu novih primerov in po številu smrti na letni ravni se rak glave in vratu uvršča na šesto mesto najpogostejših rakov na svetu. Iz tega razloga sta nadaljnja molekularna karakterizacija kancerogeneze in novih molekulskih terapevtskih tarč ključnega pomena. Cilj magistrske naloge je bil določiti proteom posameznih celičnih frakcij ploščatoceličnega karcinoma glave in vratu. Optimizirali smo postopek celične frakcionacije celične linije FaDu na osnovi različno močnih surfaktantov in diferencialnega centrifugiranja, s katerim smo celične beljakovine ločili na citosolne, jedrne in frakcijo, ki je vsebovala beljakovine membranskih organelov vključno s proteini celične membrane. Učinkovitost subcelične frakcionacije smo preverili z metodo western blot z uporabo ustreznih proteinskih označevalcev. Proteomsko analizo posameznih frakcij smo opravili z masno spektrometrijo visoke ločljivosti in načinom za neodvisno pridobivanje spektralnih podatkov. Identificirali smo 5273 beljakovin v treh celičnih frakcijah, od tega smo 2730 beljakovinam določili ustrezno celično lokacijo z nenadzorovanim strojnim učenjem s programom MetaMass. V nalogi smo kot prvi na celičnem modelu celične linije FaDu določili proteom jedrne in citosolne frakcije ter frakcije membranskih organelov ploščatoceličnega karcinoma glave in vratu. V nadaljevanju bo potrebno klinično in terapevtsko uporabnost okarakteriziranih beljakovin še potrditi.
Keywords:rak glave in vratu, subcelična frakcionacija, masna spektrometrija, FaDu celice, terapevtska tarča, nHPLC-HRMS
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Polak]
Year of publishing:2022
Number of pages:1 spletni vir (1 datoteka PDF (XI, 91 f.))
PID:20.500.12556/DKUM-83069 New window
UDC:[577:576.3]:543.51(043.2)
COBISS.SI-ID:132674819 New window
Publication date in DKUM:06.10.2022
Views:674
Downloads:60
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:15.09.2022

Secondary language

Language:English
Title:Protocol optimization for protein isolation from FaDu cell line fractions for proteomic analysis using mass spectrometry
Abstract:Head and Neck Cancer (HNC) is a diverse group of cancers, including cancers of the oral and nasal cavities, the larynx, and the pharynx. Despite advances in the understanding of genetic and environmental risk factors as well as the molecular and cellular mechanisms involved in the development of HNC, the clinical outcomes of current therapies in terms of disease relapse and mortality rates are of great concern, as HNC ranks as the sixth most common cancer worldwide. To this end, further molecular characterization of HNC carcinogenesis and new molecular therapeutic targets are of crucial importance. In this thesis, to analyze the proteome of subcellular fractions of head and neck squamous cell carcinoma, optimizing cell fractionation of the FaDu cell line was based on surfactants of increasing stringency and differential centrifugation to isolate cytosolic and nuclear fractions and a fraction containing membrane organelles, including the plasma membrane. The efficiency of subcellular fractionation was verified by western blot. Proteome analysis of crude protein fractions was done by data-independent acquisition with high resolution mass spectrometry, using label-free quantification to determine protein abundance. A total of 5273 proteins were identified in the three cell fractions, of which 2730 proteins were assigned the corresponding cellular location by unsupervised machine learning with MetaMass. In this work, we are the first to analyse the proteome of cytosolic, nuclear and membrane organelle fractions in the head and neck squamous cell carcinoma FaDu cell model. Further studies are needed to evaluate the efficacy of identified proteins as potential clinical and therapeutic targets.
Keywords:head and neck cancer, subcellular fractionation, mass spectrometry, FaDu cell, therapeutic target, nHPLC-HRMS


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