Cited by 135Iron Metabolism and DisordersFerroptosis and cancer prognosisNeurological diseases and metabolism

Analysis of the biologic functions of H- and L-ferritins in HeLa cells by transfection with siRNAs and cDNAs: evidence for a proliferative role of L-ferritin

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Cozzi, Anna, Corsi, Barbara, Levi, Sonia, Santambrogio, Paolo, Biasiotto, Giorgio, Arosio, Paolo·2004·Blood

Abstract

We describe the use of small interfering RNAs (siRNAs) to down-regulate H- and L-ferritin levels in HeLa cells. siRNAs repressed H- and L-ferritin expression to about 20% to 25% of the background level in both stable and transient transfections. HeLa cells transfected with H- and L-ferritin cDNAs were analyzed in parallel to compare the effects of ferritin up- and down-regulation. We found that large modifications of L-ferritin levels did not affect iron availability in HeLa cells but positively affected cell proliferation rate in an iron-independent manner. The transient down-regulation of H-ferritin modified cellular iron availability and resistance to oxidative damage, as expected. In contrast, the stable suppression of H-ferritin in HeLa cell clones transfected with siRNAs did not increase cellular iron availability but made cells less resistant to iron supplementation and chelation. The results indicate that L-ferritin has no direct effects on cellular iron homeostasis in HeLa cells, while it has new, iron-unrelated functions. In addition, they suggest that H-ferritin function is to act as an iron buffer.

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Crossref · 10.1182/blood-2003-06-1842

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Authors
Cozzi, A., Corsi, B., Levi, S., Santambrogio, P., Biasiotto, G., & Arosio, P.
Affiliations
IRCCS San Raffaele Roma (IT)
Venue
Blood
Published
2004-03-15
Volume
103
Issue
6
Pages
2377-2383
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W1519013154
Cited by
132
References
43
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 7 · 2022: 3 · 2021: 2 · 2020: 6 · 2019: 5 · 2018: 1 · 2017: 3 · 2016: 4 · 2015: 7 · 2014: 9 · 2013: 21 · 2012: 4
FWCI
3.07
Type
journal article
Language
en
Licence
other-oa
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Ferroptosis and cancer prognosis
  • Life Sciences › Neuroscience › Neurology › Neurological diseases and metabolism
Keywords
H-ferritin, L-ferritin, HeLa cells, cell proliferation, iron homeostasis, iron availability, iron supplementation, chelation, siRNA knockdown
MeSH terms
Quaternary Ammonium Compounds, Buffers, Cell Division, Ferric Compounds, Ferritins, HeLa Cells, Humans, Iron, Transfection, Down-Regulation, Up-Regulation, Gene Expression, DNA, Complementary, Oxidative Stress, RNA, Small Interfering

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