Evidence map›Paper›PMID 23674869›Full record

ArticleWorld journal of gastroenterology2013

CYP24A1 inhibition facilitates the anti-tumor effect of vitamin D3 on colorectal cancer cells.

János P Kósa, Péter Horváth, János Wölfling, Dóra Kovács, Bernadett Balla, Péter Mátyus, Evelin Horváth, Gábor Speer, István Takács, Zsolt Nagy and 2 more

Open access · hybridAbstract read
In one paragraph

Article in World journal of gastroenterology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.6field-weighted citation impact, top 11% 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

26 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Biomolecules · 2025
    Article
  6. Review
  7. [Calcium, Vitamin D, and Colorectal Cancer].The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi · 2023
    Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. The role of vitamin D in hepatic metastases from colorectal cancer.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2018
    Review
  16. Article
  17. Review
  18. Article
  19. Article
  20. Oncology letters · 2015
    Article
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

12 authors at 1 institution in 1 country.

János P Kósa1st Department of Internal Medicine, Semmelweis University, H-1083 Budapest, Hungary. jkosa@bel1.sote.hu
Péter Horváth
János Wölfling
Dóra Kovács
Bernadett Balla
Péter Mátyus
Evelin Horváth
Gábor Speer
István Takács
Zsolt Nagy
Henrik Horváth
Péter Lakatos
Semmelweis University · HU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimThe effects of vitamin D3 have been investigated on various tumors, including colorectal cancer (CRC). 25-hydroxyvitamin-D3-24-hydroxylase (CYP24A1), the enzyme that inactivates the active vitamin D3 metabolite 1,25-dihydroxyvitamin D3 (1,25-D3), is considered to be the main enzyme determining the biological half-life of 1,25-D3. During colorectal carcinogenesis, the expression and concentration of CYP24A1 increases significantly, suggesting that this phenomenon could be responsible for the proposed efficacy of 1,25-D3 in the treatment of CRC. The aim of this study was to investigate the anti-tumor effects of vitamin D3 on the human CRC cell line Caco-2 after inhibition of the cytochrome P450 component of CYP24A1 activity.

methodsWe examined the expression of CYP24A1 mRNA and the effects of 1,25-D3 on the cell line Caco-2 after inhibition of CYP24A1. Cell viability and proliferation were determined by means of sulforhodamine-B staining and bromodeoxyuridine incorporation, respectively, while cytotoxicity was estimated via the lactate dehydrogenase content of the cell culture supernatant. CYP24A1 expression was measured by real-time reverse transcription polymerase chain reaction. A number of tetralone compounds were synthesized to investigate their CP24A1 inhibitory activity.

resultsIn response to 1,25-D3, CYP24A1 mRNA expression was enhanced significantly, in a time- and dose-dependent manner. Caco-2 cell viability and proliferation were not influenced by the administration of 1,25-D3 alone, but were markedly reduced by co-administration of 1,25-D3 and KD-35, a CYP24A1-inhibiting tetralone. Our data suggest that the mechanism of action of co-administered KD-35 and 1,25-D3 does not involve a direct cytotoxic effect, but rather the inhibition of cell proliferation.

conclusionThese findings demonstrate that the selective inhibition of CYP24A1 by compounds such as KD-35 may be a new approach for enhancement of the anti-tumor effect of 1,25-D3 on CRC.

Indexed as

Antineoplastic AgentsCaco-2 CellsCalcitriolCell ProliferationCell SurvivalColorectal NeoplasmsDose-Response Relationship, DrugEnzyme InductionEnzyme InhibitorsHumansRNA, MessengerSteroid HydroxylasesTetralonesTime FactorsVitamin D3 24-HydroxylaseAntineoplastic AgentsCalcitriolCYP24A1 protein, humanEnzyme InhibitorsRNA, MessengerSteroid HydroxylasesTetralonesVitamin D3 24-HydroxylaseCaco-2 cell cultureColorectal cancerCYP24A1 inhibitionTetralone derivativesVitamin D3

Identifiers

PMID23674869
PMCPMC3645380
OpenAlexW2149363162

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.