Cited by 1,101Iron Metabolism and DisordersTrace Elements in HealthPlant Micronutrient Interactions and Effects

The DOI matches its Crossref record; 25 of the 26 references it cites were found in a registry or an index.

An Iron-Regulated Ferric Reductase Associated with the Absorption of Dietary Iron

Abstract

The ability of intestinal mucosa to absorb dietary ferric iron is attributed to the presence of a brush-border membrane reductase activity that displays adaptive responses to iron status. We have isolated a complementary DNA, Dcytb (for duodenal cytochrome b), which encoded a putative plasma membrane di-heme protein in mouse duodenal mucosa. Dcytb shared between 45 and 50% similarity to the cytochrome b561 family of plasma membrane reductases, was highly expressed in the brush-border membrane of duodenal enterocytes, and induced ferric reductase activity when expressed in Xenopus oocytes and cultured cells. Duodenal expression levels of Dcytb messenger RNA and protein were regulated by changes in physiological modulators of iron absorption. Thus, Dcytb provides an important element in the iron absorption pathway.

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Crossref · 10.1126/science.1057206

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  1. Male mice (6 to 9 weeks old) of the CD-1 strain were used for experimental manipulations of iron status. Hypoxia iron deficiency and iron loading were carried out as described previously (10). Hypotransferrinemic mice were bred and maintained as described previously (16). Animal procedures were approved by the U.K. Home Office. Total RNA was extracted from tissues and Northern blotting was carried out as previously described (10). The above-described 114-bp fragment of Dcytb was used as the probe. We carried out reverse transcription on 10 μg of total RNA from each tissue using 100 U of Superscript II (Gibco) and 100 nM random hexamers (Pharmacia) and following the manufacturer's instructions. PCR was performed in a PTC 200 thermal cycler (MJ Research Waltham MA) with 0.5 U of Taq polymerase (Supertaq HT Biotechnology Cambridge) 200 μM deoxynucleoside triphosphate (Fermentas Hanover MD) and gene-specific primers (sequences available on request) at a concentration of 10 μM. Products were compared after 20 25 and 30 cycles. The products shown in Fig. 2D are after 20 [GAPDH (glyceraldehyde phosphate dehydrogenase) and Dcytb] and 30 cycles (gp91- phox ). The data shown were reproducible in independent experiments on individual mice from each group. In situ hybridizations were carried out as previously described (10).
  2. Simpson R. J., J. Nutr. 126, 1858 (1996).
  3. Simpson R. J., et al., Clin. Sci. 96, 16P (1999).
  4. Georgatsou E., Alexandraki D., Mol. Cell. Biol. 14, 3065 (1994).
  5. Roman D. G., et al., Mol. Cell. Biol. 13, 4342 (1993).

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Metadata

Authors
McKie, A. T., Barrow, D., Latunde-Dada, G. O., Rolfs, A., Sager, G., Mudaly, E., Mudaly, M., Richardson, C., Barlow, D., Bomford, A., Peters, T. J., Raja, K. B., Shirali, S., Hediger, M. A., Farzaneh, F., & Simpson, R. J.
Affiliations
  • King's College London (GB)
  • Brigham and Women's Hospital (US)
  • Department of Clinical Biochemistry,
Corresponding author
McKie, Andrew T.
Venue
Science
Published
2001-03-02
Volume
291
Issue
5509
Pages
1755-1759
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2105749655
Cited by
1,101
References
26
Citations by year
2026: 25 · 2025: 41 · 2024: 44 · 2023: 30 · 2022: 45 · 2021: 43 · 2020: 55 · 2019: 40 · 2018: 50 · 2017: 33 · 2016: 22 · 2015: 28 · 2014: 48 · 2013: 44 · 2012: 47
FWCI
28.99
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
Keywords
ferric reductase, dietary iron absorption, duodenal cytochrome b, Dcytb, cytochrome b561, brush border membrane, duodenal enterocytes, Xenopus oocyte expression
MeSH terms
Amino Acid Sequence, Anemia, Animals, Hypoxia, Cell Line, Cloning, Molecular, Cytochrome b Group, Duodenum, Enzyme Induction, Ferric Compounds, Intestinal Absorption, Intestinal Mucosa, Male, Microvilli, Molecular Sequence Data, Nitroblue Tetrazolium, Oocytes, Oxidation-Reduction, Oxidoreductases, RNA, Messenger, Tetrazolium Salts, Thiazoles, Transfection, Xenopus, Up-Regulation, DNA, Complementary, Iron, Dietary, Enterocytes, Mice

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