Estrogen and iron deficiency regulate the synthesis of transferrin in chick liver by causing a specific increase in transcription of the transferrin gene. The relative rate of synthesis of transferrin mRNA was measured by allowing isolated nuclei to continue transcription in vitro in the presence of [CU-~~P]UTP. The 32P transcripts then were hybridized to immobilized recombinant DNA containing ...

trichuriasis is an intestinal parasitic disease which is caused by trichuris trichiura, a soil transmitted helminth. in order to evaluate the iron status of trichuriasis in patients a total of 120 (49 males and 71 females) cases with trichuris trichiura as well as 54 healthy individuals were evaluated. blood samples were analyzed for serum iron, transferrin saturation percent, haemoglobin and o...

Estrogen and iron deficiency regulate the synthesis of transferrin in chick liver by causing a specific increase in transcription of the transferrin gene. The relative rate of synthesis of transferrin mRNA was measured by allowing isolated nuclei to continue transcription in vitro in the presence of [CU-~~P]UTP. The 32P transcripts then were hybridized to immobilized recombinant DNA containing ...

The endocytosis of diferric transferrin and accumulation of its iron by freshly isolated rabbit reticulocytes was studied using 59Fe-125I-transferrin. Internalized transferrin was distinguished from surface-bound transferrin by its resistance to release during treatment with Pronase at 4 degrees C. Endocytosis of diferric transferrin occurs at the same rate as exocytosis of apotransferrin, the ...

Staphylococcus aureus and Staphylococcus epidermidis both recognize and bind the human iron-transporting glycoprotein, transferrin, via a 42-kDa cell surface protein receptor. In an iron-deficient medium, staphylococcal growth can be promoted by the addition of human diferric transferrin but not human apotransferrin. To determine whether the staphylococcal transferrin receptor is involved in th...

Nine of the twelve known variants of human transferrin have been resolved by the action of neuraminidase into stepwise patterns of four additional slower moving components whose relative intensities depended upon the concentration of enzyme. These components appeared to represent the stepwise removal of the four sialic acid residues from the transferrin molecule, and at large enzyme concentrati...

Transferrin has been considered to be an essential requirement for hematopoietic cell proliferation in culture. We have isolated two cloned lymphoma cell lines, SL 12.1 and SL 12.4, which grow and adapt in serum-free medium without added transferrin. Antibody to the transferrin receptor blocks the growth of these cells. We have also demonstrated that transferrin-free conditioned medium from the...

Since transferrin is required for cellular proliferation, we investigated transferrin synthesis by a small cell lung cancer line (NCI-H510) that survives in serum-free media without added transferrin. Immunoassays for human transferrin demonstrated that these cells contained immunoreactive human transferrin. Immunofluorescence studies showed that the protein is expressed on the surface of cells...