Evidence map›Paper›PMID 22648952›Full record

ArticleAmerican journal of physiology. Cell physiology2012

VDR and CYP27B1 are expressed in C2C12 cells and regenerating skeletal muscle: potential role in suppression of myoblast proliferation.

Ratchakrit Srikuea, Xiping Zhang, Ok-Kyong Park-Sarge, Karyn A Esser

Abstract read
In one paragraph

Article in American journal of physiology. Cell physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 1 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

85 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  8. Observational
  9. Review
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  11. Regulatory role of vitamin DScientific reports · 2025
    Article
  12. Review
  13. Review
  14. Observational
  15. Review
  16. Vitamin D stimulates Il-15 synthesis in rodent muscle.Biochemistry and biophysics reports · 2025
    Article
  17. Article
  18. Article
  19. Review
  20. Article

25 more citing papers are in PubMed but not listed here.

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

4 authors.

Ratchakrit SrikueaCenter for Muscle Biology, Department of Physiology, College of Medicine, University of Kentucky, Lexington, USA. ratchakrit@uky.edu
Xiping Zhang
Ok-Kyong Park-Sarge
Karyn A Esser

Funding

SKELETAL MUSCLE HYPERTROPHY AND INTRACELLULAR SIGNALINGR01AR045617 · NIAMS · UNIVERSITY OF KENTUCKY · PI ESSER, KARYN A · 1999 to 2011
$2.9M
NIAMS NIH HHS AR-045617-09S2NIAMS NIH HHS AR-45617
6 · The paper itself

Abstract

1α,25(OH)(2)D(3), the active form of vitamin D(3), has been reported to regulate the cell biology of skeletal muscle. However, there has been some controversy about the expression of the vitamin D receptor (VDR) and thus the potential role of vitamin D(3) in skeletal muscle. In this study, we isolated and sequenced the full-length Vdr and Cyp27b1 transcripts in C2C12 myoblasts and myotubes. Western blots and immunocytochemistry confirmed protein expression in both myoblasts and myotubes clearly demonstrating that C2C12 cells express VDR and CYP27B1. To determine the vitamin D(3) action, we found that C2C12 myoblasts treated with either 1α,25(OH)(2)D(3) or 25(OH)D(3) inhibited cell proliferation and this was associated with increased Vdr expression. The observation that treatment of C2C12 myoblasts with the inactive form of vitamin D(3), [25(OH)D(3)], inhibited proliferation suggested that CYP27B1 was functionally active. We used small interfering RNA to knock down Cyp27b1 in myoblasts, and cells were treated with 25(OH)D(3). The growth-suppressive effects of 25(OH)D(3) were abolished, suggesting that CYP27B1 in myoblasts is necessary for the ability of 25(OH)D(3) to affect cell proliferation. Finally, we analyzed expression of VDR and CYP27B1 in regenerating skeletal muscle in vivo. We found that expression of VDR and CYP27B1 increased significantly at day 7 of regeneration, and these results confirm the expression of Vdr and Cyp27b1 in vivo and suggest a potential role for vitamin D(3) in skeletal muscle regeneration following injury.

Indexed as

25-Hydroxyvitamin D3 1-alpha-HydroxylaseAnimalsBase SequenceCalcifediolCalcitriolCell LineCell ProliferationDNAGene Expression RegulationMiceMice, Inbred C57BLMolecular Sequence DataMuscle, SkeletalMyoblastsReal-Time Polymerase Chain ReactionReceptors, Calcitriol25-Hydroxyvitamin D3 1-alpha-HydroxylaseCalcifediolCalcitriolDNAReceptors, CalcitriolRNA, MessengerRNA, Small Interfering

Identifiers

PMID22648952
PMCPMC3422988

What OpenQuestion holds

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Read underepoch 390

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.