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INDUCED POLYPLOIDY AND SORTING OF DAMAGED DNA BY MICRONUCLEATION IN RADIORESISTANT RAT LIVER EPITHELIAL STEM-LIKE CELLS EXPOSED TO X-RAYS.
Probl Radiac Med Radiobiol
December 2019
Ivan Franko National University of Lviv, Faculty of Biology, 4 Mykhaila Hrushevskoho St., Lviv, 79005, Ukraine.
Objective: Rat liver stem-like epithelial cells (WB-F344) that under certain conditions may differentiate into hepa- tocyte and biliary lineages were subjected to acute X-irradiation with the aim to examine cell cycle peculiarities dur- ing the course of survival.
Materials And Methods: Suspensions of WB-F344 cells that grew as a monolayer and reached sub-confluence were irradiated with 1, 5, and 10 Gy of X-rays (2 Gy/min). As an intact control, sham-irradiated cells were used.
Gadolinium (4s)-4-(4-ethoxybenzyl-3,6,9-tris(carboxylato-methyl)-3,6,9- triazaudecandioic acid (EOB) diethylenetriaminepentaacetic acid (DTPA), a hepatocellular-directed magnetic resonance (MR) contrast agent, and coated superparamagnetic iron oxide particles (SPIO), a Kupffer cell-directed contrast agent, were compared for uptake and enhancement in a rodent model of radiation-induced liver injury. A single x-irradiation exposure (50-70 Gy) was delivered to one side of the liver in 18 rats. MR imaging was performed 3 days after x irradiation with sequential injections of the two contrast agents in the same rats.
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