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Transport of 3 - bromopyruvate across the human erythrocyte membrane

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Sadowska-Bartosz I., Soszynski M., Ulaszewski S., Ko Y., Bartosz G.

Cellular and Molecular Biology Letters

2014

tom 19

nr 2

3-Bromopyruvic acid (3-BP) is a promising anticancer compound because it is a strong inhibitor of glycolytic enzymes, especially glyceraldehyde 3-phosphate dehydrogenase. The Warburg effect means that malignant cells are much more dependent on glycolysis than normal cells. Potential complications of anticancer therapy with 3-BP are side effects due to its interaction with normal cells, especially erythrocytes. Transport into cells is critical for 3-BP to have intracellular effects. The aim of our study was the kinetic characterization of 3-BP transport into human erythrocytes. 3-BP uptake by erythrocytes was linear within the first 3 min and pH-dependent. The transport rate decreased with increasing pH in the range of 6.0–8.0. The Km and Vm values for 3-BP transport were 0.89 mM and 0.94 mmol/(l cells x min), respectively. The transport was inhibited competitively by pyruvate and significantly inhibited by DIDS, SITS, and 1-cyano-4-hydroxycinnamic acid. Flavonoids also inhibited 3-BP transport: the most potent inhibition was found for luteolin and quercetin.

Ograniczanie wyników

1 Cellular and Molecular Biology Letters

1 Bartosz G.

1 Ko Y.

1 Sadowska-Bartosz I.

1 Soszynski M.

1 Ulaszewski S.

1 2014

Wyniki wyszukiwania

Transport of 3 - bromopyruvate across the human erythrocyte membrane