Pojedinosti o zapisu

Synthesis, Spectroscopic Characterization and Biological Activity of N-1-Sulfonylcytosine Derivatives

Hrčak - Portal znanstvenih časopisa Republike Hrvatske

Vidi informacije o repozitoriju  Pogledaj original
 
Polje Vrijednost
 
Naslov Synthesis, Spectroscopic Characterization and Biological Activity of N-1-Sulfonylcytosine Derivatives
Sinteza, spektroskopska karakterizacija i biološka aktivnost N-1-sulfonilcitozinskih derivata
 
Autor Kašnar-Šamprec, Jelena
Glavaš-Obrovac, Ljubica
Pavlak, Marina
Mihaljević, Ivica
Mrljak, Vladimir
Štambuk, Nikola
Konjevoda, Paško
Žinić, Biserka
 
Tema N-1-sulfonylcytosine derivatives: in vitro antiproliferative effect; antitumor activity; hematological findings
 
Opis Large scale preparation of N-1-sulfonylcytosine derivatives has been optimized. The best method was the condensation reaction of silylated cytosine (1) with p-toluenesulfonyl chloride in acetonitrile. Depending on the isolation procedure, 1-(p-toluenesulfonyl)cytosine 2 and 1-(p- -toluenesulfonyl)cytosine hydrochloride 3 were isolated in 80 % and 75 % yields, respectively. The NMR evidence presented shows that 2 appears as a common keto-amino tautomer in DMSO-d6 solution while its hydrochloride 3 forms exclusively the rare keto imino tautomer. N-1-Sulfonylcytosine derivatives 2 and 3 were investigated for possible cytotoxic activity on human normal fibroblasts (WI38), human pancreatic adenocarcinoma cells (MIAPaCa2), poorly differentiated cells from lymph node metastases of colon carcinoma (SW-620), and human Burkitt lymphoma cells (Raji). MTT-cytotoxicity screens in human tissue culture cell lines
showed that both investigated compounds demonstrated antiproliferative activity in different histological types of tumors. In comparison with 5-fluorouracil, some of N-1-sulfonylcytosine
derivatives showed 10 times stronger activity, with respect IC50. The inhibitory effect of the investigated derivatives on normal human cells was lower compared to their antitumor effects. In addition to antitumor effects, hematological findings following the parenteral administration of substances were also investigated.
Optimizirana je priprava većih količina N-1-sulfonilcitozinskih derivata, kondenzacijom sililiranoga citozina i p-toluensulfonil klorida u acetonitrilu. Ovisno o načinu izolacije dobiveni su 1-(p-toluensulfonil)citozin 2 (80 %) i 1-(p-toluensulfonil)citozin hidroklorid 3 (75 %). NMR eksperimenti pokazuju isključivo nastajanje keto-imino tautomera 3 u DMSO-d6 otopini, dok se 2 pojavljuje u uobičajenome keto-amino obliku. Ispitivani su potencijalni citotoksični učinci N-1-sulfonilcitozinskih derivata 2 i 3 na fibroblastima čovjeka (WI38), stanicama adenokarcinoma gušterače (MIAPaCa2), slabo diferenciranim metastazama adenokarcinoma debelog crijeva (SW-620) i stanicama Burkitt-ovog limfoma (Raji). Rezultati dobiveni MTT-testom pokazuju da ispitivani spojevi djeluju antiproliferativno na različite histološke tipove tumora. U usporedbi s 5-fluorouracilom, N-1-sulfonilcitozinski derivati pokazuju 10 puta jaču inhibiciju rasta izloženih tumorskih stanica. Inhibicijski učinci ispitivanih spojeva na normalne stanice značajno su slabiji u odnosu na protutumorske učinke. Osim antitumorskoga učinka, ispitivani su i hematološki parametri poslije parenteralne primjene ispitivanih tvari.
 
Izdavač Croatian Chemical Society
 
Datum 2005-06-15
 
Vrsta resursa text
 
Format (na primjer PDF) pdf
 
Identifikator http://hrcak.srce.hr/20
http://hrcak.srce.hr/file/20
 
Izvor Croatica Chemica Acta (cca@chem.pmf.hr); Vol.78 No.2; ISSN 0011-1643 (Print); ISSN 1334-417X (Online)
 
Jezik en
 
Prava Parts of the contents of Croat. Chem. Acta (e. g. figures or tables) may be reproduced without prior permission, provided reference is made to their source.