Evidence map›Paper›PMID 21576599›Full record

ArticleJournal of lipid research2011

Cholesterol 25-hydroxylation activity of CYP3A.

Akira Honda, Teruo Miyazaki, Tadashi Ikegami, Junichi Iwamoto, Tomomi Maeda, Takeshi Hirayama, Yoshifumi Saito, Tamio Teramoto, Yasushi Matsuzaki

Open access · hybridAbstract read
In one paragraph

Article in Journal of lipid research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 1 pooled it
7.1field-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

58 citing papers in PubMed, 1 synthesis or guideline pooled it, 117 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. 25-Hydroxycholesterol in health and diseases.Journal of lipid research · 2024
    Review
  10. Enzymatically Formed Oxysterols and Cell Death.Advances in experimental medicine and biology · 2024
    Review
  11. Article
  12. Article
  13. Review
  14. Review
  15. Review
  16. Review
  17. Review
  18. Article
  19. Clinical Evidence and Potential Mechanisms of Complementary Treatment ofEvidence-based complementary and alternative medicine : eCAM · 2022
    Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 3 countries.

Akira HondaDepartment of Gastroenterology, Center for Collaborative Research, Ibaraki 300-0395, Japan.
Teruo Miyazaki
Tadashi Ikegami
Junichi Iwamoto
Tomomi Maeda
Takeshi Hirayama
Yoshifumi Saito
Tamio Teramoto
Yasushi Matsuzaki
Collaborative Research Group · AUJapan Association for Development of Community Medicine · JPTokyo Medical University Ibaraki Medical Center · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To date, many studies have been conducted using 25-hydroxycholesterol, which is a potent regulator of lipid metabolism. However, the origins of this oxysterol have not been entirely elucidated. Cholesterol 25-hydroxylase is one of the enzymes responsible for the metabolism of 25-hydroxycholesterol, but the expression of this enzyme is very low in humans. This oxysterol is also synthesized by sterol 27-hydroxylase (CYP27A1) and cholesterol 24-hydroxylase(CYP46A1), but it is only a minor product of these enzymes. We now report that CYP3A synthesizes a significant amount of 25-hydroxycholesterol and may participate in the regulation of lipid metabolism. Induction of CYP3A by pregnenolone-16α-carbonitrile caused the accumulation of 25-hydroxycholesterol in a cell line derived from mouse liver. Furthermore, treatment of the cells with troleandomycin, a specific inhibitor of CYP3A, significantly reduced cellular 25-hydroxycholesterol concentrations. In cells that overexpressed human recombinant CYP3A4, the activity of cholesterol 25-hydroxylation was found to be higher than that of cholesterol 4β-hydroxylation, a known marker activity of CYP3A4. In addition, 25-hydroxycholesterol concentrations in normal human sera correlated positively with the levels of 4β-hydroxycholesterol (r = 0.650, P < 0.0001, n = 78), but did not significantly correlate with the levels of 27-hydroxycholesterol or 24S-hydroxycholesterol. These results demonstrate the significance of CYP3A on the production of 25-hydroxycholesterol.

Indexed as

AnimalsBlotting, WesternCell LineCytochrome P-450 CYP3ACytochrome P-450 Enzyme InhibitorsCytochrome P-450 Enzyme SystemElectrophoresis, Polyacrylamide GelEnzyme ActivationGene ExpressionHepatocytesHumansHydroxycholesterolsLipid MetabolismLiverMembrane ProteinsMice25-hydroxycholesterolcholesterol 25-hydroxylaseCyp3a11 protein, mouseCYP3A4 protein, humanCytochrome P-450 CYP3ACytochrome P-450 Enzyme InhibitorsCytochrome P-450 Enzyme SystemHydroxycholesterolsMembrane ProteinsPregnenolone CarbonitrileRNA, MessengerSteroid HydroxylasesTroleandomycin

Identifiers

PMID21576599
PMCPMC3137016
OpenAlexW2123295289

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.