Evidence map›Paper›PMID 24576174›Full record

ArticleMolecular cancer2014

High calcium concentration in bones promotes bone metastasis in renal cell carcinomas expressing calcium-sensing receptor.

Elke Joeckel, Tobias Haber, Dirk Prawitt, Kerstin Junker, Christian Hampel, Joachim W Thüroff, Frederik C Roos, Walburgis Brenner

Open access · goldAbstract read
In one paragraph

Article in Molecular cancer, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed
5.6field-weighted citation impact, top 3% of its field
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

63 citing papers in PubMed, 102 citations in OpenAlex.

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  9. The function of GPCRs in different bone cells.International journal of biological sciences · 2025
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  18. Liquid biopsies in primary and secondary bone cancers.Cancer drug resistance (Alhambra, Calif.) · 2022
    Review
  19. Roles of calcium signaling in cancer metastasis to bone.Exploration of targeted anti-tumor therapy · 2022
    Review
  20. Review

3 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

8 authors at 3 institutions in 1 country.

Elke Joeckel
Tobias Haber
Dirk Prawitt
Kerstin Junker
Christian Hampel
Joachim W Thüroff
Frederik C Roos
Walburgis BrennerDepartment of Urology, Johannes Gutenberg University Medical Center, Langenbeckstr 1, Mainz 55131, Germany. brenner@uni-mainz.de.
University Medical Center of the Johannes Gutenberg University Mainz · DEJohannes Gutenberg University Mainz · DESaarland University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe prognosis for renal cell carcinoma (RCC) is related to a high rate of metastasis, including 30% of bone metastasis. Characteristic for bone tissue is a high concentration of calcium ions. In this study, we show a promoting effect of an enhanced extracellular calcium concentration on mechanisms of bone metastasis via the calcium-sensing receptor (CaSR) and its downstream signaling molecules.

methodsOur analyses were performed using 33 (11/category) matched specimens of normal and tumor tissue and 9 (3/category) primary cells derived from RCC patients of the 3 categories: non-metastasized, metastasized into the lung and metastasized into bones during a five-year period after nephrectomy. Expression of CaSR was determined by RT-PCR, Western blot analyses and flow cytometry, respectively. Cells were treated by calcium and the CaSR inhibitor NPS 2143. Cell migration was measured in a Boyden chamber with calcium (10 μM) as chemotaxin and proliferation by BrdU incorporation. The activity of intracellular signaling mediators was quantified by a phospho-kinase array and Western blot.

resultsThe expression of CaSR was highest in specimens and cells of patients with bone metastases. Calcium treatment induced an increased migration (19-fold) and proliferation (2.3-fold) exclusively in RCC cells from patients with bone metastases. The CaSR inhibitor NPS 2143 elucidated the role of CaSR on the calcium-dependent effects. After treatment with calcium, the activity of AKT, PLCγ-1, p38α and JNK was clearly enhanced and PTEN expression was almost completely abolished in bone metastasizing RCC cells.

conclusionsOur results indicate a promoting effect of extracellular calcium on cell migration and proliferation of bone metastasizing RCC cells via highly expressed CaSR and its downstream signaling pathways. Consequently, CaSR may be regarded as a new prognostic marker predicting RCC bone metastasis.

Indexed as

Blotting, WesternBone and BonesBone NeoplasmsCalciumCarcinoma, Renal CellFlow CytometryHumansImmunohistochemistryKidney NeoplasmsReceptors, Calcium-SensingReverse Transcriptase Polymerase Chain ReactionCalciumReceptors, Calcium-Sensing

Identifiers

PMID24576174
PMCPMC3945739
OpenAlexW2131960721

What OpenQuestion holds

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LicenceCC BY
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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.