Evidence map›Paper›PMID 34680118›Full record

ArticleBiomolecules2021

Protocatechuic Acid, a Simple Plant Secondary Metabolite, Induced Apoptosis by Promoting Oxidative Stress through HO-1 Downregulation and p21 Upregulation in Colon Cancer Cells.

Rosaria Acquaviva, Barbara Tomasello, Claudia Di Giacomo, Rosa Santangelo, Alfonsina La Mantia, Irina Naletova, Maria Grazia Sarpietro, Francesco Castelli, Giuseppe Antonio Malfa

Open access · goldAbstract read
In one paragraph

Article in Biomolecules, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 7% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 52 citations in OpenAlex.

  1. Pooled it
  2. Review
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  4. Review
  5. Article
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  10. A Comparative Study on the Mycelium and Fruiting Body ofCurrent issues in molecular biology · 2025
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  18. Berries vs. Disease: Revenge of the Phytochemicals.Pharmaceuticals (Basel, Switzerland) · 2024
    Review
  19. Article
  20. Review
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

9 authors at 2 institutions in 1 country.

Rosaria AcquavivaDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.
Barbara TomaselloDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.ORCID 0000-0001-6049-942X
Claudia Di GiacomoDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.ORCID 0000-0002-2665-0007
Rosa SantangeloDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.
Alfonsina La MantiaDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.
Irina NaletovaInstitute of Crystallography, National Research Council (CNR), Via Paolo Gaifami, 18, 95126 Catania, Italy.ORCID 0000-0002-3186-6355
Maria Grazia SarpietroDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.ORCID 0000-0002-6799-4754
Francesco CastelliDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.
Giuseppe Antonio MalfaDepartment of Drug and Health Science, University of Catania, Viale A. Doria 6, 95125 Catania, Italy.ORCID 0000-0002-6733-0587
University of Catania · ITNational Research Council · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gastrointestinal cancers, particularly colorectal cancer, are mainly influenced by the dietary factor. A diet rich in fruits and vegetables can help to reduce the incidence of colorectal cancer thanks to the phenolic compounds, which possess antimutagenic and anticarcinogenic properties. Polyphenols, alongside their well-known antioxidant properties, also show a pro-oxidative potential, which makes it possible to sensitize tumor cells to oxidative stress. HO-1 combined with antioxidant activity, when overexpressed in cancer cells, is involved in tumor progression, and its inhibition is considered a feasible therapeutic strategy in cancer treatment. In this study, the effects of protocatechuic acid (PCA) on the viability of colon cancer cells (CaCo-2), annexin V, LDH release, reactive oxygen species levels, total thiol content, HO-1, γ-glutamylcysteine synthetase, and p21 expression were evaluated. PCA induced, in a dose-dependent manner, a significantly reduced cell viability of CaCo-2 by oxidative/antioxidant imbalance. The phenolic acid induced modifications in levels of HO-1, non-proteic thiol groups, γ-glutamylcysteine synthetase, reactive oxygen species, and p21. PCA induced a pro-oxidant effect in cancer cells, and the in vitro pro-apoptotic effect on CaCo-2 cells is mediated by the modulation of redox balance and the inhibition of the HO-1 system that led to the activation of p21. Our results suggest that PCA may represent a useful tool in prevention and/or therapy of colon cancer.

Indexed as

ApoptosisDown-RegulationOxidative StressSecondary MetabolismCaco-2 CellsCell DeathCell SurvivalColonic NeoplasmsCyclin-Dependent Kinase Inhibitor p21Gene Expression Regulation, NeoplasticGlutamate-Cysteine LigaseHeme Oxygenase-1HumansHydroxybenzoatesL-Lactate DehydrogenaseOxidation-ReductionCyclin-Dependent Kinase Inhibitor p21Glutamate-Cysteine LigaseHeme Oxygenase-1HydroxybenzoatesL-Lactate Dehydrogenaseprotocatechuic acidReactive Oxygen SpeciesSulfhydryl Compoundsannexin VCaCo-2LDH leakagep21phenolic acidsprooxidantstotal thiol groupsγ-GCS

Identifiers

PMID34680118
PMCPMC8533287
OpenAlexW3203122116

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.