
Prekomjerno stvaranje reaktivnih kisikovih spojeva (ROS) u stanicama uzrokuje ireverzibilne modifikacije proteina, kao što je na primjer karbonilacija, koje utječu na njihovu strukturu i funkciju te na stabilnost proteoma. Istraživanja provedena na bakterijama i beskralješnjacima su pokazala postojanje korelacije između oštećenja proteoma i stanične smrti. Cilj ovog rada bio je utvrditi postoji li takva poveznica između stanične smrti i oštećenja proteina imortalnih staničnih linija dobivenih iz primarnog tumora (SW480) i metastaze (SW620) adenokarcinoma debelog crijeva. Izlaganjem staničnih linija oksidativnom stresu utvrdili smo da stanična linija SW620 ima nižu razinu oštećenih proteina od stanica SW480 te je otpornija na oštećenja proteoma izazvanih UVC zračenjem. Razlog povećane otpornosti proteoma stanica SW620 mogla bi biti niska razina ROS-a u odnosu na stanice SW480 i veća stabilnost proteoma. Usporednom analizom proteoma staničnih linija SW480 i SW620 u trenutku kada je smrtnost u populaciji iznosila 90% utvrdili smo da su mogući razlozi povećane osjetljivosti stanica SW480 narušene funkcije sustava za održavanje proteostaze i odstranjivanja oštećenih proteina te smo identificirali proteine koji bi mogli biti potencijalne mete u razvoju protutumorskih terapija.
The excessive production of reactive oxygen species (ROS) in cells induces irreversible protein modifications, carbonylation, that impairs protein structure and function, as well as proteome stability. The correlation between proteome damage and cell death is well established in bacteria and invertebrates and the aim of this research was to investigate the relationship between mortality and protein damage of immortal cell lines derived from primary tumor adenocarcinoma SW480 and its metastasis SW620. We found that SW620 cell line is more resistant to UVC-induced oxidative damage relative to SW480 cells. The reason for greater resistance of SW620 cells could be lower ROS level compared to SW480 and greater proteome stability. The differential analysis of proteomes of two cell lines after 90% UVC-induced mortality shows that SW480 displays greater sensitivity due to the damage of proteome quality system and the ability to remove oxidative damaged proteins. Also, we identified proteins that could be possible targets in anti-cancer therapy.
reactive oxygen species, PRIRODNE ZNANOSTI. Biologija., oksidacija proteina ; stanična smrt ; reaktivne kisikove vrste ; primarni tumor ; metastaza, stanična smrt, metastaza, Biochemistry. Molecular biology. Biophysics, primarni tumor, info:eu-repo/classification/udc/577(043.3), cell death, primary tumor, oksidacija proteina, Biokemija. Molekularna biologija. Biofizika, metastasis, protein oxidation, NATURAL SCIENCES. Biology., reaktivne kisikove vrste
reactive oxygen species, PRIRODNE ZNANOSTI. Biologija., oksidacija proteina ; stanična smrt ; reaktivne kisikove vrste ; primarni tumor ; metastaza, stanična smrt, metastaza, Biochemistry. Molecular biology. Biophysics, primarni tumor, info:eu-repo/classification/udc/577(043.3), cell death, primary tumor, oksidacija proteina, Biokemija. Molekularna biologija. Biofizika, metastasis, protein oxidation, NATURAL SCIENCES. Biology., reaktivne kisikove vrste
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