| pubmed-article:6286649 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:6286649 | lifeskim:mentions | umls-concept:C0018873 | lld:lifeskim |
| pubmed-article:6286649 | lifeskim:mentions | umls-concept:C0034845 | lld:lifeskim |
| pubmed-article:6286649 | lifeskim:mentions | umls-concept:C0851285 | lld:lifeskim |
| pubmed-article:6286649 | pubmed:issue | 17 | lld:pubmed |
| pubmed-article:6286649 | pubmed:dateCreated | 1982-10-21 | lld:pubmed |
| pubmed-article:6286649 | pubmed:abstractText | HeLa cells were found to have a single class of non-interacting receptors specific for transferrin. Both apotransferrin and diferric transferrin competed equally with 125I-diferric transferrin for receptor binding. Transferrin binding was temperature-dependent and reversible. Binding of transferrin to cells exhibited a KD of 27 nM with a maximum binding capacity of 1.8-3.7 x 10(6) molecules/cell. Cells grown in the presence of diferric transferrin or in the presence of ferric ammonium citrate exhibited a concentration- and time-dependent decrease in 125I-diferric transferrin binding. The decrease in binding activity reflected a reduction in receptor number rather than an alteration in ligand receptor affinity. Growth of cells in saturating concentrations of apotransferrin did not cause a decrease in receptor number. When iron-treated cells were removed to media free of ferric ammonium citrate, the receptor number returned to control values by 40 h. When receptors were removed with trypsin, cells grown and maintained in ferric ammonium citrate-supplemented media demonstrated a rate of receptor reappearance 47% that of control cells grown in ferric ammonium citrate-free media. Cells grown in media supplemented with diferric transferrin or ferric ammonium citrate exhibited an increase in cytosolic iron content. The transferrin receptor number returned to normal after cells were removed to unsupplemented media, despite persistent elevation of cytosolic iron content. Increased iron content did not appear to be the sole factor determining receptor number. | lld:pubmed |
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| pubmed-article:6286649 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:6286649 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:6286649 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:6286649 | pubmed:month | Sep | lld:pubmed |
| pubmed-article:6286649 | pubmed:issn | 0021-9258 | lld:pubmed |
| pubmed-article:6286649 | pubmed:author | pubmed-author:KaplanJJ | lld:pubmed |
| pubmed-article:6286649 | pubmed:author | pubmed-author:KushnerJ PJP | lld:pubmed |
| pubmed-article:6286649 | pubmed:author | pubmed-author:WardJ HJH | lld:pubmed |
| pubmed-article:6286649 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:6286649 | pubmed:day | 10 | lld:pubmed |
| pubmed-article:6286649 | pubmed:volume | 257 | lld:pubmed |
| pubmed-article:6286649 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:6286649 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:6286649 | pubmed:pagination | 10317-23 | lld:pubmed |
| pubmed-article:6286649 | pubmed:dateRevised | 2011-11-17 | lld:pubmed |
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| pubmed-article:6286649 | pubmed:year | 1982 | lld:pubmed |
| pubmed-article:6286649 | pubmed:articleTitle | Regulation of HeLa cell transferrin receptors. | lld:pubmed |
| pubmed-article:6286649 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:6286649 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
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