Evidence map›Paper›PMID 34416289›Full record

ArticleToxicology in vitro : an international journal published in association with BIBRA2021

E-cigarette fluids and aerosol residues cause oxidative stress and an inflammatory response in human keratinocytes and 3D skin models.

Careen Khachatoorian, Wentai Luo, Kevin J McWhirter, James F Pankow, Prue Talbot

Open access · hybridAbstract read
In one paragraph

Article in Toxicology in vitro : an international journal published in association with BIBRA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.7field-weighted citation impact, top 18% 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

9 citing papers in PubMed, 22 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Enhancing Transcutaneous Drug Delivery: Advanced Perspectives on Skin Models.JID innovations : skin science from molecules to population health · 2025
    Review
  5. Article
  6. Article
  7. Zebrafish (International journal of molecular sciences · 2023
    Review
  8. Article
  9. 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

5 authors at 2 institutions in 1 country.

Careen KhachatoorianDepartment of Molecular, Cell & Systems Biology, University of California, Riverside, Riverside, CA, United States.
Wentai LuoDepartment of Civil and Environmental Engineering, Portland State University, Portland, OR, United States.
Kevin J McWhirterDepartment of Civil and Environmental Engineering, Portland State University, Portland, OR, United States.
James F PankowDepartment of Civil and Environmental Engineering, Portland State University, Portland, OR, United States.
Prue TalbotDepartment of Molecular, Cell & Systems Biology, University of California, Riverside, Riverside, CA, United States. Electronic address: talbot@ucr.edu.
Portland State University · USUniversity of California, Riverside · US

Funding

Identification and toxicity of chemicals that are linked to EVALIR01ES029741 · NIEHS · UNIVERSITY OF CALIFORNIA RIVERSIDE · PI TALBOT, PRUDENCE · 2018 to 2022
$3.7M
NIEHS NIH HHS R01 ES029741
6 · The paper itself

Abstract

Our goal was to evaluate the effects of EC refill fluids and EC exhaled aerosol residue (ECEAR) on cultured human keratinocytes and MatTek EpiDerm™, a 3D air liquid interface human skin model. Quantification of flavor chemicals and nicotine in Dewberry Cream and Churrios refill fluids was done using GC-MS. The dominant flavor chemicals were maltol, ethyl maltol, vanillin, ethyl vanillin, benzyl alcohol, and furaneol. Cytotoxicity was determined with the MTT and LDH assays, and inflammatory markers were quantified with ELISAs. Churrios was cytotoxic to keratinocytes in the MTT assay, and both fluids induced ROS production in the medium (ROS-Glo™) and in cells (CellROX). Exposure of EpiDerm™ to relevant concentrations of Dewberry Cream and Churrios for 4 or 24 h caused secretion of inflammatory markers (IL-1α, IL-6, and MMP-9), without altering EpiDerm™ histology. Lab made fluids with propylene glycol (PG) or PG plus a flavor chemical did not produce cytotoxic effects, but increased secretion of IL-1α and MMP-9, which was attributed to PG. ECEAR derived from Dewberry Cream and Churrios did not produce cytotoxicity with Epiderm™, but Churrios ECEAR induced IL-1α secretion. These data support the conclusion that EC chemicals can cause oxidative damage and inflammation to human skin.

Indexed as

Electronic Nicotine Delivery SystemsAerosolsCells, CulturedGas Chromatography-Mass SpectrometryHumansInflammationInterleukin-1alphaKeratinocytesMaleMatrix Metalloproteinase 9Oxidative StressSkinYoung AdultAerosolsInterleukin-1alphaMatrix Metalloproteinase 9Electronic cigaretteFlavorsInflammationOxidative stressRefill fluids

Identifiers

PMID34416289
PMCPMC8627378
OpenAlexW3195585504

What OpenQuestion holds

Textmetadata
LicenceTDM
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.