Evidence map›Paper›PMID 25041108›Full record

ArticleInternational wound journal2016

The effects of caffeine on wound healing.

Nkemcho Ojeh, Olivera Stojadinovic, Irena Pastar, Andrew Sawaya, Natalie Yin, Marjana Tomic-Canic

Open access · greenAbstract read
In one paragraph

Article in International wound journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 12% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 61 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Caffeine Protects Keratinocytes fromInternational journal of molecular sciences · 2024
    Article
  5. Article
  6. Article
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  11. Effects of Caffeine Consumption on Autologous Full-Thickness Skin Graft Healing in an Animal Model.Indian journal of plastic surgery : official publication of the Association of Plastic Surgeons of India · 2021
    Article
  12. Article
  13. Review
  14. Pharmacological and Genetic Inhibition of Caveolin-1 Promotes Epithelialization and Wound Closure.Molecular therapy : the journal of the American Society of Gene Therapy · 2019
    Article
  15. Bacterial cellulose/phytochemical's extracts biocomposites for potential active wound dressings.Environmental science and pollution research international · 2019
    Article
  16. Article
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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

6 authors at 2 institutions in 2 countries.

Nkemcho OjehFaculty of Medical Sciences, The University of the West Indies, St. Michael, Barbados. nkemcho.ojeh@cavehill.uwi.edu.
Olivera StojadinovicWound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, FL, USA.
Irena PastarWound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, FL, USA.
Andrew SawayaWound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, FL, USA.
Natalie YinWound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, FL, USA.
Marjana Tomic-CanicWound Healing and Regenerative Medicine Research Program, Department of Dermatology and Cutaneous Surgery, University of Miami, Miller School of Medicine, Miami, FL, USA.
University of Miami · USUniversity of the West Indies · BB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The purine alkaloid caffeine is a major component of many beverages such as coffee and tea. Caffeine and its metabolites theobromine and xanthine have been shown to have antioxidant properties. Caffeine can also act as adenosine-receptor antagonist. Although it has been shown that adenosine and antioxidants promote wound healing, the effect of caffeine on wound healing is currently unknown. To investigate the effects of caffeine on processes involved in epithelialisation, we used primary human keratinocytes, HaCaT cell line and ex vivo model of human skin. First, we tested the effects of caffeine on cell proliferation, differentiation, adhesion and migration, processes essential for normal wound epithelialisation and closure. We used 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) proliferation assay to test the effects of seven different caffeine doses ranging from 0·1 to 5 mM. We found that caffeine restricted cell proliferation of keratinocytes in a dose-dependent manner. Furthermore, scratch wound assays performed on keratinocyte monolayers indicated dose-dependent delays in cell migration. Interestingly, adhesion and differentiation remained unaffected in monolayer cultures treated with various doses of caffeine. Using a human ex vivo wound healing model, we tested topical application of caffeine and found that it impedes epithelialisation, confirming in vitro data. We conclude that caffeine, which is known to have antioxidant properties, impedes keratinocyte proliferation and migration, suggesting that it may have an inhibitory effect on wound healing and epithelialisation. Therefore, our findings are more in support of a role for caffeine as adenosine-receptor antagonist that would negate the effect of adenosine in promoting wound healing.

Indexed as

Wound HealingCaffeineCell MovementCell ProliferationHumansKeratinocytesTetrazolium SaltsThiazolesCaffeineTetrazolium SaltsThiazolesthiazolyl blueCaffeineEx vivo modelMigrationProliferationRe-epithelialisationWound healing

Identifiers

PMID25041108
PMCPMC7950075
OpenAlexW1934346124

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.