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Cited by 661

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The Stem Cell Marker Bcrp/ABCG2 Enhances Hypoxic Cell Survival through Interactions with Heme

Open access
Krishnamurthy, Partha, Ross, Douglas D., Nakanishi, Takeo, Bailey-Dell, Kim, Zhou, Sheng, Mercer, Kelly E., Sarkadi, Balazs, Sorrentino, Brian P., Schuetz, John D.·2004·Journal of Biological Chemistry

Abstract

Our studies demonstrate that the ABC transporter and marker of stem and progenitor cells known as the breast cancer resistance protein (BCRP or ABCG2) confers a strong survival advantage under hypoxic conditions. We show that, under hypoxia, progenitor cells from Bcrp(-)/(-)mice have a reduced ability to form colonies as compared with progenitor cells from Bcrp(+/+) mice. Blocking BCRP function in Bcrp(+/+) progenitor cells markedly reduces survival under hypoxic conditions. However, blocking heme biosynthesis reverses the hypoxic susceptibility of Bcrp(-/-) progenitor cells, a finding that indicates that heme molecules (i.e. porphyrins) are detrimental to Bcrp(-/-) cells under hypoxia. BCRP specifically binds heme, and cells lacking BCRP accumulate porphyrins. Finally, Bcrp expression is up-regulated by hypoxia, and we demonstrate that this up-regulation involves the hypoxia-inducible transcription factor complex HIF-1. Collectively, our findings suggest that cells can, upon hypoxic demand, use BCRP to reduce heme or porphyrin accumulation, which can be detrimental to cells. Our findings have implications for the survival of stem cells and tumor cells in hypoxic environments.

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Crossref · 10.1074/jbc.m313599200

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Metadata

Authors
Krishnamurthy, P., Ross, D. D., Nakanishi, T., Bailey-Dell, K., Zhou, S., Mercer, K. E., Sarkadi, B., Sorrentino, B. P., & Schuetz, J. D.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2004-06
Volume
279
Issue
23
Pages
24218-24225
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2104711019
Cited by
661
References
3
FWCI
18.21
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The Stem Cell Marker Bcrp/ABCG2 Enhances Hypoxic Cell Survival through Interactions with Heme. https://app.cochat.ai/papers/10.1074/jbc.m313599200
The paper
Krishnamurthy, P., Ross, D. D., Nakanishi, T., Bailey-Dell, K., Zhou, S., Mercer, K. E., Sarkadi, B., Sorrentino, B. P., & Schuetz, J. D. (2004). The Stem Cell Marker Bcrp/ABCG2 Enhances Hypoxic Cell Survival through Interactions with Heme. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m313599200

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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