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Title:Antikarcinogeni potenciali polifenolnih spojin iz smilja - računalniški pristop
Authors:ID Malić, Marina (Author)
ID Bren, Urban (Mentor) More about this mentor... New window
ID Furlan, Veronika (Comentor)
Files:.pdf UN_Malic_Marina_2018.pdf (2,34 MB)
MD5: 385874B37E1C8657F120DBD4FCF74613
PID: 20.500.12556/dkum/b869d257-9348-4982-a318-b05d39854ea6
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V diplomski nalogi smo preučevali spojino arzanol iz smilja v vlogi polifenolnega lovilca devetih končnih kemijskih karcinogenov: aflatoksin B1-ekso-8,9-epoksida, etilen oksida, kloroetilen oksida, vinil karbamat epoksida, glicidamida, stiren oksida, propilen oksida, 2-cianoetilen oksida in beta-propiolaktona. S pomočjo računalniške kemije smo na nivoju kvantnomehanske teorije Hartee-Fock izračunali aktivacijske proste energije reakcij alkilacije naštetih karcinogenov z arzanolom pri treh različnih fleksibilnih baznih setih. Rezultate dobljene po solvatacijskih metodah Samouglašenega reakcijskega polja in Langevinovih dipolov, ki upoštevata vpliv topila, smo primerjali z eksperimentalno dobljenimi aktivacijskimi prostimi energijami za reakcije posameznega karcinogena z najreaktivnejšo bazo DNA - gvaninom - in na podlagi primerjave sklepali, ali je arzanol učinkovit lovilec posameznega kemijskega karcinogena. Rezultati nakazujejo, da ima arzanol velik potencial kot naravni lovilec kemijskih karcinogenov, saj je aktivacijska prosta energija za reakcije arzanola z osmimi od devetih karcinogenov nižja od eksperimentalno določene aktivacijske proste energije za reakcije posameznega karcinogena z gvaninom. Na podlagi tega sklepamo, da bi arzanol večino kemijskih karcinogenov uspel uloviti, še preden bi ti v telesu reagirali z gvaninom in poškodovali DNA. Menimo, da smo z našo raziskavo postavili začetne temelje za nadaljne raziskave arzanola kot naravnega lovilca kemijskih karcinogenov in prispevali k novim smernicam eksperimentalnih ter kliničnih raziskav v boju proti raku.
Keywords:smilj, arzanol, kemijski karcinogeni, kvantnomehanski izračuni
Place of publishing:Maribor
Publisher:[M. Malić]
Year of publishing:2018
PID:20.500.12556/DKUM-71614 New window
UDC:577.332:615.277.4(043.2)
COBISS.SI-ID:21976086 New window
NUK URN:URN:SI:UM:DK:DVMGPPWI
Publication date in DKUM:05.10.2018
Views:1633
Downloads:211
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:23.08.2018

Secondary language

Language:English
Title:Anticarcinogenic potential of polyphenolic compounds from helichrysum italicum - a computational approach
Abstract:In the diploma thesis, we studied the compound arzanol from plant Helichrysum italicum in the role of the polyphenolic scavenger for nine ultimate chemical carcinogens of aflatoxin B1-ekso-8,9-epoxide, ethylene oxide, chloroethylene oxide, vinyl carbamate epoxide, glycidamide, styrene oxide, propylene oxide, 2-cyanoethylene oxide and β-propiolactone. Using computational chemistry, the activation free energies of the alkylation reactions of these carcinogens with arzanol were calculated with quantum mechanical method Hartree-Fock in conjunction with three different flexible basis sets. The results obtained with solvation methods Self-consistent reaction field and Langevin dipoles, that take into account the influence of the solvent, were compared with the experimentally determined activation free energies of the reactions of an individual chemical carcinogen with the most reactive DNA base - guanine - and on the basis of the comparison it was concluded that arzanol is an effective scavenger of chemical carcinogens. The results suggest that arzanol has a potential as a natural scavenger of chemical carcinogens since activation free energies for reactions between arzanol and eight chemical carcinogens are lower than experimentally determined activation free energies for reactions of individual chemical carcinogens with guanine. Based on our results, we can conclude that arzanol would succeed in catching most chemical carcinogens before they could react with guanine in our body and damage DNA. We believe that our research represents the initial bases for further studies on arzanol as a natural scavenger of chemical carcinogens and contributed to new guidelines for experimental and clinical researches in the fight against cancer.
Keywords:Helichrysum italicum, arzanol, chemical carcinogens, quantum mechanical calculations


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