Sniženje vrednosti supresorskih ćelija mijeloidnog porekla kod bolesnika sa melanomom indukovano interferonom alfa
Sažetak
Uvod/Cilj. Interakcija između tumorskih ćelija i imunoregulatornih ćelija domaćina u stvaranju mikrookruženja koje pospešuje progresiju tumora nalazi se u žiži brojnih istraživanja poslednjih godina. Supresorske ćelije mijeloidnog porekla predstavljaju heterogenu populaciju nezrelih dendritičnih ćelija, makrofaga i granulocita. Kod bolesnika sa tumorom ove ćelije akumuliraju se u tumorskom mikrookruženju, drenažnim limfnim čvorovima, perifernoj krvi i jetri i njihov broj koreliše sa stadijumom bolesti i metastatskom bolešću. Cilj rada bio je ispitivanje efekata interferona alfa na procentualnu zastupljenost supresorskih ćelija mijeloidnog porekla u perifernoj krvi bolesnika sa melanomom. Metode. Bolesnici lečeni interferonom dobijali su interferon alfa potkožno, u optimalnim dozama, najmanje šest meseci pre izvođenja analize. Uzorci krvi uzimani su od bolesnika sa melanomom (n = 91) i zdravih kontrola (n = 8) sličnog uzrasta i pola. Sledeća antihumana monoklonska antitela korišćena su za imunofenotipizaciju: anti-CD15-FITC, anti-CD33-PE, anti-CD45-ECD, anti-HLA-DR PE/Cy5, anti-CD14-FITC, anti-CD16-PE i anti-CD11b-PE. Rezultati. Poređenjem vrednosti supresorskih ćelija mijeloidnog porekla između bolesnika u 2. stadijumu melanoma koji jesu i bolesnika koji nisu lečeni interferonom alfa, nije utvrđena statistički značajna razlika. Kada smo uporedili vrednosti supresorskih ćelija mijeloidnog porekla kod bolesnika u 3. stadijumu melanoma pronašli smo značajnu razliku u vrednostima granulocitne podgrupe ovih ćelija između grupe lečenih i grupe nelečenih interferonom alfa. Poređenjem vrednosti svih populacija ovih supresorskih ćelija između bolesnika lečenih interferonom alfa i zdravih osoba utvrđene su značajno više vrednosti supresorskih ćelija kod bolesnika sa melanomom. Granulocitne i ukupne supresorske ćelije mijeloidnog porekla bile su značajno niže kod bolesnika sa progresijom melanoma koji su lečeni interferonom alfa nego kod bolesnika sa stabilnom bolešću koji nisu lečeni interferonom alfa. Zaključak. Interferon alfa dovodi do sniženja vrednosti supresorskih ćelija mijeloidnog porekla kod bolesnika u 3. stadijumu melanoma. Takođe, utvrdili smo povratak visokih vrednosti ovih supresorskih ćelija nakon mnogo meseci od prestanka terapije interferonom alfa.
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