Folate receptor allows cells to grow in low concentrations of 5-methyltetrahydrofolate
- PMID: 1631087
- PMCID: PMC402127
- DOI: 10.1073/pnas.89.13.6006
Folate receptor allows cells to grow in low concentrations of 5-methyltetrahydrofolate
Abstract
The folate receptor mediates the uptake of 5-methyltetrahydrofolate in certain cultured cells by a process called potocytosis. When these cells are grown in physiological concentrations of folate, the receptor increases the efficiency of vitamin uptake by 30-fold. We now show that PAM 212 cells, a mouse keratinocyte cell line, are unable to grow in 1 nM 5-methyltetrahydrofolate unless they express a functional folate receptor. These results suggest that under certain conditions, tissue cells in the body may depend on the folate receptor to obtain enough 5-methyltetrahydrofolate for growth.
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