Evidence map›Paper›PMID 39039245›Full record

ArticleCommunications biology2024

Differential but complementary roles of HIF-1α and HIF-2α in the regulation of bone homeostasis.

Sun Young Lee, Su-Jin Kim, Ka Hyon Park, Gyuseok Lee, Youngsoo Oh, Je-Hwang Ryu, Yun Hyun Huh

Abstract read
In one paragraph

Article in Communications biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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  11. Mechanosensitive ion channels as novel targets in osteoporosis.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Sun Young Lee *Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
Su-Jin Kim *Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
Ka Hyon ParkDepartment of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
Gyuseok LeeDepartment of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.ORCID 0000-0002-5258-9166
Youngsoo OhDepartment of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
Je-Hwang RyuDepartment of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea. jesryu@jnu.ac.kr.ORCID 0000-0002-8708-8943
Yun Hyun HuhSchool of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea. yhuh@gist.ac.kr.ORCID 0000-0002-8507-8602

Funding

National Research Foundation of Korea (NRF) 2019R1A5A2027521National Research Foundation of Korea (NRF) 2021R1A2C3005727
6 · The paper itself

Abstract

Bone is a highly dynamic tissue undergoing continuous formation and resorption. Here, we investigated differential but complementary roles of hypoxia-inducible factor (HIF)-1α and HIF-2α in regulating bone remodeling. Using RNA-seq analysis, we identified that specific genes involved in regulating osteoblast differentiation were similarly but slightly differently governed by HIF-1α and HIF-2α. We found that increased HIF-1α expression inhibited osteoblast differentiation via inhibiting RUNX2 function by upregulation of Twist2, confirmed using Hif1a conditional knockout (KO) mouse. Ectopic expression of HIF-1α via adenovirus transduction resulted in the increased expression and activity of RANKL, while knockdown of Hif1a expression via siRNA or osteoblast-specific depletion of Hif1a in conditional KO mice had no discernible effect on osteoblast-mediated osteoclast activation. The unexpected outcome was elucidated by the upregulation of HIF-2α upon Hif1a overexpression, providing evidence that Hif2a is a transcriptional target of HIF-1α in regulating RANKL expression, verified through an experiment of HIF-2α knockdown after HIF-1α overexpression. The above results were validated in an ovariectomized- and aging-induced osteoporosis model using Hif1a conditional KO mice. Our findings conclude that HIF-1α plays an important role in regulating bone homeostasis by controlling osteoblast differentiation, and in influencing osteoclast formation through the regulation of RANKL secretion via HIF-2α modulation.

Indexed as

Basic Helix-Loop-Helix ProteinsHomeostasisHypoxia-Inducible Factor 1, alpha SubunitMice, KnockoutOsteoblastsAnimalsBone and BonesCell DifferentiationEndothelial PAS Domain-Containing Protein 1FemaleMiceMice, Inbred C57BLOsteoclastsOsteogenesisOsteoporosisBasic Helix-Loop-Helix ProteinsEndothelial PAS Domain-Containing Protein 1Hif1a protein, mouseHypoxia-Inducible Factor 1, alpha Subunit

Identifiers

PMID39039245
PMCPMC11263705

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.