Evidence map›Paper›PMID 28377966›Full record

ArticleBone reports2015

Primary human osteoblasts with reduced alkaline phosphatase and matrix mineralization baseline capacity are responsive to extremely low frequency pulsed electromagnetic field exposure - Clinical implication possible.

Sabrina Ehnert, Karsten Falldorf, Anne-Kristin Fentz, Patrick Ziegler, Steffen Schröter, Thomas Freude, Björn G Ochs, Christina Stacke, Michael Ronniger, Jens Sachtleben and 1 more

Abstract read
In one paragraph

Article in Bone reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing 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

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

  1. Pooled it
  2. The effects of dairy products containingFrontiers in nutrition · 2026
    Trial
  3. On the Effect of Electroacupuncture in Promoting Healing after High Tibial Osteotomy.Computational and mathematical methods in medicine · 2022
    Trial
  4. Article
  5. Signalling pathways underlying pulsed electromagnetic fields in bone repair.Frontiers in bioengineering and biotechnology · 2024
    Review
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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

11 authors.

Sabrina EhnertSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
Karsten FalldorfSachtleben GmbH, Falkenried 88, 20251 Hamburg, Germany.
Anne-Kristin FentzSachtleben GmbH, Falkenried 88, 20251 Hamburg, Germany.
Patrick ZieglerSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
Steffen SchröterSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
Thomas FreudeSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
Björn G OchsSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
Christina StackeSachtleben GmbH, Falkenried 88, 20251 Hamburg, Germany.
Michael RonnigerSachtleben GmbH, Falkenried 88, 20251 Hamburg, Germany.
Jens SachtlebenSachtleben GmbH, Falkenried 88, 20251 Hamburg, Germany.
Andreas K NusslerSiegfried Weller Institute for Trauma Research, Eberhard-Karls-Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

For many years electromagnetic fields (EMFs) have been used clinically with various settings as an exogenous stimulation method to promote fracture healing. However, underlying mechanisms of action and EMF parameters responsible for certain effects remain unclear. Our aim was to investigate the influence of defined EMFs on human osteoblasts' and osteoclasts' viability and function. Primary human osteoblasts and osteoclasts were treated 3 times weekly for 21 days during their maturation process using the Somagen® device (Sachtleben GmbH, Hamburg, Germany), generating defined extremely low-frequency pulsed electromagnetic fields (ELF-PEMFs). Certain ELF-PEMF treatment significantly increased the total protein content (up to 66%), mitochondrial activity (up to 91.1%) and alkaline phosphatase (AP) activity (up to 129.9%) of human osteoblasts during the entire differentiation process. Furthermore, ELF-PEMF treatment enhanced formation of mineralized matrix (up to 276%). Interestingly, ELF-PEMF dependent induction of AP activity and matrix mineralization was strongly donor dependent - only osteoblasts with a poor initial osteoblast function responded to the ELF-PEMF treatment. As a possible regulatory mechanism, activation of the ERK1/2 signaling pathway was identified. Maturation of osteoclasts from human monocytes was not affected by the ELF-PEMF treatment. In summary the results indicate that a specific ELF-PEMF treatment with the Somagen® device improves viability and maturation of osteoblasts, while osteoclast viability and maturation was not affected. Hence, ELF-PEMF might represent an interesting adjunct to conventional therapy supporting bone formation during fracture healing or even for the treatment of osteoporosis.

Indexed as

ERK1/2Extremely low-frequency pulsed electromagnetic fields (ELF-PEMF)Human osteoblastsHuman osteoclastsSpecific EMF-responsiveness

Identifiers

PMID28377966
PMCPMC5365212

What OpenQuestion holds

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LicenceCC BY-NC-ND
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.