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Sinteza tiofenskih analogov 3-fenilizoksazolo[5,4-d]pirimidin-4(5H)-ona z zaviralnim delovanjem na indolamin 2,3-dioksigenazo 1 = Synthesis of thiophene analogs of 3-phenylisoxazolo[5,4-d]pyrimidin-4(5H)-one with inhibitory activity against indoleamine 2,3-dioxygenase 1 : enoviti magistrski študijski program Farmacija : Uniform Master's Study Programme PharmacyNovak, Teja, farmacevtkaIndolamin 2,3-dioksigenaza 1 je eden izmed treh encimov, ki sodelujejo pri razgradnji aminokisline triptofan po kinureninski poti. Gre za inducibilen, citosolen, hem-vsebujoči encim. Njegovo ... izražanje je povišano v tumorskih celicah ter v mikrookolju tumorja, kar pa predstavlja slabo prognozo za pacienta. Znižane koncentracije triptofana in povišane koncentracije njegovega metabolita kinurenina, namreč privedejo do določenih imunosupresivnih pojavov, kot so: zorenje limfocitov T v smeri regulatornih celic, aktivacija mieloidnih supresorskih celic, hkrati pa pride tudi do zmanjšanja količin efektorskih limfocitov T in naravnih celic ubijalk. Povišane koncentracije kinurenina naj bi prispevale celo k rasti žilja in invadiranju tumorja. IDO 1 zato predstavlja potencialno tarčo za razvoj zaviralcev v boju proti rakavim obolenjem. Kar nekaj potencialnih učinkovin je trenutno prisotnih v kliničnih študijah, obetavni pa so predvsem rezultati pri uporabi zaviralcev IDO v kombinaciji z že uveljavljenimi kemoterapevtiki. Namen magistrske naloge je bil sinteza potencialnih zaviralcev IDO1 na osnovi strukture 3-fenilizoksazolo[5,4-d]pirimidin-4(5H)-ona (rezultat virtualnega rešetanja). Osnovna sintezna pot je obsegala 5 stopenj. Intermediatom in končnim produktom smo z analitskimi metodami določili fizikalno-kemijske lastnosti ter potrdili njihovo istovetnost. Z biokemijskimi testi pa smo končnim produktom določili še zaviralno aktivnost in jakost delovanja. Naš cilj dela je bil pridobiti zaviralec IDO1 s čim nižjo vrednostjo IC50 (mikromolarna ali nižja). Vsi sintetizirani končni produkti so pokazali zaviralno aktivnost napram encimu IDO1, vendar je samo spojina N-(4-nitrofenil)-2-(4-okso-3-(tiofen-3-il)izoksazolo[5,4-d]pirimidin-5(4H)-il)acetamid (18) povzročila več kot 50 % zaviranje pri 100 [mikro]M, in sicer 67,8 %. Omenjeno zmanjšanje delovanja encima je bilo zadostno za določitev vrednosti IC50, ki je za to spojino znašala 39,6 [mikro]M. Dobili smo torej zaviralec IDO1 v mikromolarnem območju, katerega struktura ponuja dodatne informacije in dobro izhodišče za optimizacijo in izboljšave na področju razvoja zaviralcev encima IDO1.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [T. Novak], 2021Language - slovenianCOBISS.SI-ID - 59172611
Author
Novak, Teja, farmacevtka
Other authors
Sova, Matej, 1979-
Topics
Imunski sistem |
Rak (medicina) |
Indolamin 2, 3-dioksigenaza 1 |
zaviralna aktivnost |
toleranca |
imunosupresivni pojavi |
biokemijski testi
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Library/institution |
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Faculty of Pharmacy, Ljubljana | Ljubljana | FFALJ |
reading room 1 cop.
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Novak, Teja, farmacevtka | ![]() |
Sova, Matej, 1979- | 25490 |
Source: Personal bibliographies
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