Prokhorova I.V., Kolesnik D.L., Pyaskovskaya O.N., Solyanik G.I.

Aim: to study the peculiarities of glucose metabolism in tumor cells of two variants of Lewis lung carcinoma with different metastatic and angiogenic potentials. Object and methods: in vitro study was carried out using cultured LLC and LLC/R9 cell lines, and in vivo on С57/BL6 female mice. There were a total of 40 animals used. It is known that two variants of Lewis lung carcinoma, LLC and LLC/R9, are tumors of the same genesis, but have different biological properties: LLC/R9 in comparison with LLC is characterized by higher proliferative, angiogenic and lower metastatic (according to the volume and number of pulmonary metastases) potentials. Methods of experimental oncology, cell culture, biochemical and statistical methods have been used. Results: it was revealed that LLC/R9 cells characterized by 37.3% (p < 0.05) higher rate of glucose consumption and in 50.6% (p < 0.05) higher lactate production rate in comparison with corresponding high-metastatic variant of Lewis lung carcinoma cells. The lactate and pyruvate levels in the tumor tissue of high-angiogenic variant of Lewis lung carcinoma were found to be significantly lower than the respective rates for the high-metastatic variant by 24.0% (p < 0.05) and 56.0% (p < 0.05). It was shown that blood glucose level in LLC-bearing animals exceeded intact and LLC/R9 index by 30.0% (p < 0.05) and 33.5% (p < 0.05), respectively, and the rate of lactate tended to decrease. Conclusions: it was found that glucose metabolism of LLC cells considerably differ from that of LLC/R9 cells. As compared to LLC, LLC/R9 cells are characterized by high levels of glucose consumption, which results in their rapid in vivo growth and low blood glucose level in LLC/R9-bearing mice.

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