Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells
Aluminum (Al) and iron (Fe) share several physicochemical characteristics and they both bind to transferrin (Tf), entering the cell via Tf receptors (TfR). Previously, we found similar values of affinity constant for the binding of TfR to Tf carrying either Al or Fe. The competitive interaction betw...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01674889_v1745_n1_p124_Perez http://hdl.handle.net/20.500.12110/paper_01674889_v1745_n1_p124_Perez |
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paper:paper_01674889_v1745_n1_p124_Perez2023-06-08T15:16:27Z Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells Pérez, Gladys Mabel Pregi, Nicolás Vittori, Daniela Cecilia Di Risio, Cecilia Diana Garbosa, Graciela Nesse, Alcira Beatriz Aluminum Iron metabolism K562 cell line Non-transferrin bound iron transport Transferrin receptor Transferrin-mediated iron uptake aluminum antigen iron messenger RNA receptor subtype transferrin transferrin receptor article chronic myeloid leukemia controlled study flow cytometry human human cell iron depletion iron transport leukemia cell priority journal protein expression receptor binding regulatory mechanism reverse transcription polymerase chain reaction upregulation Aluminum Biological Transport Butyrates Cell Differentiation Gene Expression Regulation, Neoplastic Humans Iron K562 Cells Receptors, Transferrin RNA, Messenger Transferrin Aluminum (Al) and iron (Fe) share several physicochemical characteristics and they both bind to transferrin (Tf), entering the cell via Tf receptors (TfR). Previously, we found similar values of affinity constant for the binding of TfR to Tf carrying either Al or Fe. The competitive interaction between both metals prevented normal Fe incorporation into K562 cells and triggered the upregulation of Fe transport. In the present work we demonstrated that Al modified Fe uptake without affecting the expression of Tf receptors. Both TfR and TfR2 mRNA levels, evaluated by RT-PCR, and TfR antigenic sites, analyzed by flow cytometry, were found unchanged after Al exposure. In turn, Al did induce upregulation of non-Tf bound Fe (NTBI) uptake. This modulation was not due to intracellular Fe decrease since NTBI transport proved not to be regulated by Fe depletion. Unlike its behavior in the presence of Tf, Al was unable to compete with NTBI uptake, suggesting that both metals do not share the same alternative transport pathway. We propose that Al interference with TfR-mediated Fe incorporation might trigger the upregulation of NTBI uptake, an adaptation aimed at incorporating the essential metal required for cellular metabolism without allowing the simultaneous access of a potentially toxic metal. © 2004 Elsevier B.V. All rights reserved. Fil:Pérez, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pregi, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vittori, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Di Risio, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Garbossa, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Nesse, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01674889_v1745_n1_p124_Perez http://hdl.handle.net/20.500.12110/paper_01674889_v1745_n1_p124_Perez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Aluminum Iron metabolism K562 cell line Non-transferrin bound iron transport Transferrin receptor Transferrin-mediated iron uptake aluminum antigen iron messenger RNA receptor subtype transferrin transferrin receptor article chronic myeloid leukemia controlled study flow cytometry human human cell iron depletion iron transport leukemia cell priority journal protein expression receptor binding regulatory mechanism reverse transcription polymerase chain reaction upregulation Aluminum Biological Transport Butyrates Cell Differentiation Gene Expression Regulation, Neoplastic Humans Iron K562 Cells Receptors, Transferrin RNA, Messenger Transferrin |
| spellingShingle |
Aluminum Iron metabolism K562 cell line Non-transferrin bound iron transport Transferrin receptor Transferrin-mediated iron uptake aluminum antigen iron messenger RNA receptor subtype transferrin transferrin receptor article chronic myeloid leukemia controlled study flow cytometry human human cell iron depletion iron transport leukemia cell priority journal protein expression receptor binding regulatory mechanism reverse transcription polymerase chain reaction upregulation Aluminum Biological Transport Butyrates Cell Differentiation Gene Expression Regulation, Neoplastic Humans Iron K562 Cells Receptors, Transferrin RNA, Messenger Transferrin Pérez, Gladys Mabel Pregi, Nicolás Vittori, Daniela Cecilia Di Risio, Cecilia Diana Garbosa, Graciela Nesse, Alcira Beatriz Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| topic_facet |
Aluminum Iron metabolism K562 cell line Non-transferrin bound iron transport Transferrin receptor Transferrin-mediated iron uptake aluminum antigen iron messenger RNA receptor subtype transferrin transferrin receptor article chronic myeloid leukemia controlled study flow cytometry human human cell iron depletion iron transport leukemia cell priority journal protein expression receptor binding regulatory mechanism reverse transcription polymerase chain reaction upregulation Aluminum Biological Transport Butyrates Cell Differentiation Gene Expression Regulation, Neoplastic Humans Iron K562 Cells Receptors, Transferrin RNA, Messenger Transferrin |
| description |
Aluminum (Al) and iron (Fe) share several physicochemical characteristics and they both bind to transferrin (Tf), entering the cell via Tf receptors (TfR). Previously, we found similar values of affinity constant for the binding of TfR to Tf carrying either Al or Fe. The competitive interaction between both metals prevented normal Fe incorporation into K562 cells and triggered the upregulation of Fe transport. In the present work we demonstrated that Al modified Fe uptake without affecting the expression of Tf receptors. Both TfR and TfR2 mRNA levels, evaluated by RT-PCR, and TfR antigenic sites, analyzed by flow cytometry, were found unchanged after Al exposure. In turn, Al did induce upregulation of non-Tf bound Fe (NTBI) uptake. This modulation was not due to intracellular Fe decrease since NTBI transport proved not to be regulated by Fe depletion. Unlike its behavior in the presence of Tf, Al was unable to compete with NTBI uptake, suggesting that both metals do not share the same alternative transport pathway. We propose that Al interference with TfR-mediated Fe incorporation might trigger the upregulation of NTBI uptake, an adaptation aimed at incorporating the essential metal required for cellular metabolism without allowing the simultaneous access of a potentially toxic metal. © 2004 Elsevier B.V. All rights reserved. |
| author |
Pérez, Gladys Mabel Pregi, Nicolás Vittori, Daniela Cecilia Di Risio, Cecilia Diana Garbosa, Graciela Nesse, Alcira Beatriz |
| author_facet |
Pérez, Gladys Mabel Pregi, Nicolás Vittori, Daniela Cecilia Di Risio, Cecilia Diana Garbosa, Graciela Nesse, Alcira Beatriz |
| author_sort |
Pérez, Gladys Mabel |
| title |
Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| title_short |
Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| title_full |
Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| title_fullStr |
Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| title_full_unstemmed |
Aluminum exposure affects transferrin-dependent and -independent iron uptake by K562 cells |
| title_sort |
aluminum exposure affects transferrin-dependent and -independent iron uptake by k562 cells |
| publishDate |
2005 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01674889_v1745_n1_p124_Perez http://hdl.handle.net/20.500.12110/paper_01674889_v1745_n1_p124_Perez |
| work_keys_str_mv |
AT perezgladysmabel aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells AT preginicolas aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells AT vittoridanielacecilia aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells AT dirisioceciliadiana aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells AT garbosagraciela aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells AT nessealcirabeatriz aluminumexposureaffectstransferrindependentandindependentironuptakebyk562cells |
| _version_ |
1768545595737243648 |