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Title:Preučevanje antikarcinogenega potenciala polifenola apigenina
Authors:ID Fink, Aleša (Author)
ID Bren, Urban (Mentor) More about this mentor... New window
ID Furlan, Veronika (Comentor)
Files:.pdf UN_Fink_Alesa_2026.pdf (2,26 MB)
MD5: C3E247791300BE5ABCFBF94877822919
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Apigenin je naravni flavonoid prisoten v zeleni, špinači, timijanu in številnih drugih zeliščih. Raziskave so pokazale, da ima številne zdravju koristne učinke, kot so antioksidativni, antikarcinogeni, protivnetni in antidiabetični učinki. Apigenin ima velik antikarcinogeni potencial, vendar so mehanizmi njegovega delovanja še vedno slabo raziskani. V diplomski nalogi smo preučevali potencial apigenina v vlogi lovilca devetih kemijskih karcinogenov in sicer aflatoksin B1ekso-8,9-epoksida (AFB1), β-propiolaktona, 2-cianoetilen oksida, etilen oksida, glicidamida, kloroetilen oksida, propilen oksida, stiren oksida in vinil karbamat epoksida. Osredotočili smo se na preučevanje reakcijskih mehanizmov in kinetike reakcij med apigeninom in naštetimi kemijskimi karcinogeni. Cilj diplomske naloge je izračunati aktivacijske proste energije z uporabo kvantno-mehanskih gostotnih funkcionalov M11L in MN12L, fleksibilnega baznega seta 6-311++G(d,p) in solvatacijskega modela SMD. Za oceno antikarcinogene učinkovitosti apigenina smo izračunane aktivacijske proste energije primerjali z aktivacijskimi prostimi energijami za reakcijo med DNK bazo gvaninom in glutationom z enakimi kemijskimi karcinogeni. Glutation smo izbrali kot referenčno antikarcinogeno spojino, ker je najmočnejši naravni antioksidant in najboljši lovilec karcinogenov v človeškem telesu. Rezultati kažejo, da je apigenin učinkovitejši lovilec vseh preučevanih kemijskih karcinogenov v primerjavi z gvaninom. Najbolj učinkovito lovi AFB1, kloroetilen oksid in vinil karbamat epoksid, saj so bile aktivacijske proste energije najnižje. Apigenin pa je izkazal antikarcinogeni potencial tudi v primeru reakcij z etilen oksidom, stiren oksidom, 2-cianoetilen oksidom, β- propiolaktonom, propilen oksidom in glicidamidom . Primerjava aktivacijskih prostih energij za reakcije apigenina in glutationa z enakimi karcinogeni pa je pokazala, da so v primeru AFB1 glicidamida, kloroetilen oksida in vinil karbamat epoksida aktivacijske proste energije primerljive, kar pomeni, da je apigenin primerljivo učinkovit lovilec teh karcinogenov kot glutation. Aktivacijske proste energije za reakcijo apigenina z 2-cianoetilen oksidom, etilen oksidom in stiren oksidom pa so bile višje kot aktivacijske proste energije reakcij z glutationom. V primeru 2-cianoetilen oksida, etilen oksida in stiren oksida pa so bile izračunane aktivacijske proste energije višje za reakcije z apigeninom, kar kaže na manjšo učinkovitost apigenina pri lovljenju teh karcinogenov v primerjavi z glutationom.
Keywords:apigenin, kemijski karcinogeni, aktivacijske proste energije, gostotni funkcional M11L, gostotni funkcional MN12L, solvatacijski model SMD
Place of publishing:Maribor
Year of publishing:2026
PID:20.500.12556/DKUM-98921 New window
Publication date in DKUM:16.09.2026
Views:143
Downloads:1
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:17.07.2026

Secondary language

Language:English
Title:Evaluation of the anticarcinogenic potential of apigenin
Abstract:Apigenin is a natural flavonoid present in celery, spinach, thyme, and many other herbs. Previous studies have demonstrated a wide range of beneficial biological activities, including antioxidant, anticancer, anti-inflammatory, and antidiabetic effects. Although apigenin exhibits considerable anticancer potential, the molecular mechanisms underlying its activity remain insufficiently understood. In this undergraduate thesis, we investigated the potential of apigenin as a scavenger of nine chemical carcinogens, namely aflatoxin B1 exo-8,9-epoxide (AFB1), β-propiolactione, 2-cyanoethylene oxide, glycidamide, chloroethylene oxide, propylene oxide, styrene oxide, and vinyl carbamate epoxide. The study focused on elucidating the reaction mechanisms and kinetics of reactions between apigenin and selected chemical carcinogens. The main goal of the thesis is to calculate the activation free energies of these reactions using the quantum- mechanical density functionals M11L and MN12L, 6-311++G(d,p) flexible basis set and SMD solvation model. To evaluate the scavenging efficiency of apigenin, we compared the calculated activation free energies with activation free energies of the reactions of DNA base guanine and glutathione with the same nine chemical carcinogens. Glutathion was selected as a reference anticarcinogenic compound because it is the most important endogenous antioxidant and one of the most effective carcinogen scavengers in the human body. The results indicate that apigenin is a more effective scavenger of all the studied chemical carcinogens than guanine. The highest scavenging efficiency was observed for AFB1, chloroethylene oxide and vinyl carbamate epoxide, for which the lowest activation free energies were obtained. Furthermore, apigenin also demonstrated significant anticarcinogenic potential in reactions with ethylene oxide, styrene oxide and 2-cyanoethylene oxide. Comparison of the activation free energies for reactions of apigenin and glutathione with the same carcinogens revealed that, in the case of AFB1, glycidamide, chloroethylene oxide and vinyl carbamate epoxide, the activation free energies were comperable. These findings suggest that apigenin is similarly effective to glutathione in scavenging these carcinogens. In contrast, significantly higher activation free energies were obtained for 2-cyanoethylene oxide, ethylene oxide, and styrene oxide reactions with apigenin, indicating a lower scavenging efficiency of apigenin relative to glutathione for these carcinogens.
Keywords:apigenin, chemical carcinogens, activation free energy, density functional M11L, density functional MN12L, solvation model SMD


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