Evidence map›Paper›PMID 27611318›Full record

ArticlePloS one2016

Faster DNA Repair of Ultraviolet-Induced Cyclobutane Pyrimidine Dimers and Lower Sensitivity to Apoptosis in Human Corneal Epithelial Cells than in Epidermal Keratinocytes.

Justin D Mallet, Marie M Dorr, Marie-Catherine Drigeard Desgarnier, Nathalie Bastien, Sébastien P Gendron, Patrick J Rochette

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
5.1field-weighted citation impact, top 5% 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

19 citing papers in PubMed, 38 citations in OpenAlex.

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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 1 country.

Justin D MalletAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Marie M DorrAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Marie-Catherine Drigeard DesgarnierAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Nathalie BastienAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Sébastien P GendronAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Patrick J RochetteAxe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Hôpital du Saint-Sacrement, Québec City, Québec, Canada.
Université Laval · CAHôpital du Saint-Sacrement · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Absorption of UV rays by DNA generates the formation of mutagenic cyclobutane pyrimidine dimers (CPD) and pyrimidine (6-4) pyrimidone photoproducts (6-4PP). These damages are the major cause of skin cancer because in turn, they can lead to signature UV mutations. The eye is exposed to UV light, but the cornea is orders of magnitude less prone to UV-induced cancer. In an attempt to shed light on this paradox, we compared cells of the corneal epithelium and the epidermis for UVB-induced DNA damage frequency, repair and cell death sensitivity. We found similar CPD levels but a 4-time faster UVB-induced CPD, but not 6-4PP, repair and lower UV-induced apoptosis sensitivity in corneal epithelial cells than epidermal. We then investigated levels of DDB2, a UV-induced DNA damage recognition protein mostly impacting CPD repair, XPC, essential for the repair of both CPD and 6-4PP and p53 a protein upstream of the genotoxic stress response. We found more DDB2, XPC and p53 in corneal epithelial cells than in epidermal cells. According to our results analyzing the protein stability of DDB2 and XPC, the higher level of DDB2 and XPC in corneal epithelial cells is most likely due to an increased stability of the protein. Taken together, our results show that corneal epithelial cells have a better efficiency to repair UV-induced mutagenic CPD. On the other hand, they are less prone to UV-induced apoptosis, which could be related to the fact that since the repair is more efficient in the HCEC, the need to eliminate highly damaged cells by apoptosis is reduced.

Indexed as

DNA RepairUltraviolet RaysApoptosisDNA-Binding ProteinsDNA DamageEpithelial CellsEpithelium, CornealHumansKeratinocytesPyrimidine DimersTumor Suppressor Protein p53DDB2 protein, humanDNA-Binding ProteinsPyrimidine DimersTP53 protein, humanTumor Suppressor Protein p53XPC protein, human

Identifiers

PMID27611318
PMCPMC5017652
OpenAlexW2511451936

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.