Membrane fatty acid changes during the cell cycle of CV-1 cells

Abstract

Monolayers of CV-1 cells were synchronized at the G 1 S boundary of the cell cycle by a 24-h 2 m M thymidine blockade. Uptake of tritiated thymidine indicated that the peak DNA synthesis occurred 6–8 h after release from the block and that cell cycle time was 18–20 h. The fatty acid composition of phospholipids extracted from cells at 0, 7, and 18 h postblockade was measured by gas chromatography. The results indicate cyclic changes in membrane fatty acids with a significant increase in long-chain polyunsaturated fatty acids during the DNA synthesis phase (S phase) of the cell Cycle.