Cited by 58Erythropoietin and Anemia TreatmentIron Metabolism and DisordersHemoglobin structure and function

Transmembrane prolyl 4-hydroxylase is a fourth prolyl 4-hydroxylase regulating EPO production and erythropoiesis

Laitala, Anu, Aro, Ellinoora, Walkinshaw, Gail, Mäki, Joni M., Rossi, Maarit, Heikkilä, Minna, Savolainen, Eeva-Riitta, Arend, Michael +3 more·2012·Blood

Abstract

An endoplasmic reticulum transmembrane prolyl 4-hydroxylase (P4H-TM) is able to hydroxylate the α subunit of the hypoxia-inducible factor (HIF) in vitro and in cultured cells, but nothing is known about its roles in mammalian erythropoiesis. We studied such roles here by administering a HIF-P4H inhibitor, FG-4497, to P4h-tm(-/-) mice. This caused larger increases in serum Epo concentration and kidney but not liver Hif-1α and Hif-2α protein and Epo mRNA levels than in wild-type mice, while the liver Hepcidin mRNA level was lower in the P4h-tm(-/-) mice than in the wild-type. Similar, but not identical, differences were also seen between FG-4497-treated Hif-p4h-2 hypomorphic (Hif-p4h-2(gt/gt)) and Hif-p4h-3(-/-) mice versus wild-type mice. FG-4497 administration increased hemoglobin and hematocrit values similarly in the P4h-tm(-/-) and wild-type mice, but caused higher increases in both values in the Hif-p4h-2(gt/gt) mice and in hematocrit value in the Hif-p4h-3(-/-) mice than in the wild-type. Hif-p4h-2(gt/gt)/P4h-tm(-/-) double gene-modified mice nevertheless had increased hemoglobin and hematocrit values without any FG-4497 administration, although no such abnormalities were seen in the Hif-p4h-2(gt/gt) or P4h-tm(-/-) mice. Our data thus indicate that P4H-TM plays a role in the regulation of EPO production, hepcidin expression, and erythropoiesis.

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Crossref · 10.1182/blood-2012-07-441824

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  • Pharmacological inactivation of PHD enzymes with 2OG analogs increases serum EPO levels in animal models and in humans.

    “Pharmacological inactivation of PHD enzymes with 2OG analogs increases serum EPO levels in animal models and in humans”

    From Regulation of erythropoiesis by hypoxia-inducible factors (2013) · cites this paper as [92]

  • Pharmacological inactivation of PHD enzymes with 2OG analogs has the potential to benefit patients with anemia that results from inadequate EPO production.

    “and has the potential to benefit patients with anemia that results from inadequate EPO production.”

    From Regulation of erythropoiesis by hypoxia-inducible factors (2013) · cites this paper as [92]

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Authors
Laitala, A., Aro, E., Walkinshaw, G., Mäki, J. M., Rossi, M., Heikkilä, M., Savolainen, E.-R., Arend, M., Kivirikko, K. I., Koivunen, P., & Myllyharju, J.
Affiliations
  • University of Oulu (FI)
  • FibroGen (United States) (US)
  • Oulu University Hospital (FI)
Corresponding author
  • Koivunen, Peppi
  • Myllyharju, Johanna
Venue
Blood
Published
2012-10-18
Volume
120
Issue
16
Pages
3336-3344
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2042809457
Cited by
58
References
48
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 4 · 2022: 3 · 2021: 3 · 2020: 5 · 2019: 6 · 2017: 4 · 2016: 12 · 2015: 6 · 2014: 4 · 2013: 7
FWCI
3.62
Type
journal article
Language
en
Open access
closed
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
erythropoietin production, erythropoiesis, hypoxia-inducible factor, HIF-1α, HIF-2α, hepcidin, hemoglobin, hematocrit, endoplasmic reticulum
MeSH terms
Animals, Enzyme Inhibitors, Enzyme-Linked Immunosorbent Assay, Erythropoiesis, Erythropoietin, Female, Hematocrit, Hemoglobins, Liver, Mice, Inbred C57BL, Procollagen-Proline Dioxygenase, RNA, Messenger, Blotting, Western, Mice, Knockout, Reverse Transcriptase Polymerase Chain Reaction, Antimicrobial Cationic Peptides, Mice, Hypoxia-Inducible Factor 1, alpha Subunit, Real-Time Polymerase Chain Reaction, Hepcidins

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