ArticleAmerican journal of translational research2023
Thearubigins/Polymeric black tea polyphenols (PBPs) do not prevent benzo[a]pyrene (B[a]P) induced lung tumors in A/J mice.
Article in American journal of translational research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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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.
The trial behind it
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Who cites it
1 citing paper in PubMed, 1 citations in OpenAlex.
- Bioavailability of Tea Polyphenols: A Key Factor in Understanding Their Mechanisms of Action In Vivo and Health Effects.Journal of agricultural and food chemistry · 2025Review
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesPreviously we have demonstrated the chemopreventive effect of Thearubigins/Polymeric Black-tea Polyphenols (PBPs) upon pre-treatment to a combination of carcinogens, that is, Benzo[a]pyrene (B[a]P) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) which are present in Tobacco smoke (TS). However, the chemopreventive effect in response to B[a]P as a single carcinogen remains unexplored. B[a]P is a universal carcinogen and an important constituent of particulate matter 2.5 (PM
methodsWe investigated the pre-treatment of Thearubigins/PBPs as a chemopreventive agent at three doses (1.5, 5, 10%) against B[a]P-induced lung carcinogenesis at early & late time points. We also investigated the effect of PBPs at early time points to understand molecular changes by employing western blotting in xenobiotic metabolism pathways, DNA damage, inflammation, apoptosis, and proliferation as they are modulated in response to carcinogens. We used 6-8 weeks male A/J mice for tumorigenicty and western blotting to probe the molecular biomarkers.
resultsWe report no decrease in tumor incidence and multiplicity upon pre and concurrent treatment of Thearubigins/PBPs. Further, we also report no changes in molecular markers at early time points, in agreement with former observations.
conclusionOur results suggest that chemopreventive agents need to be tested with different combinations of carcinogens and regimens to fully understand the complex interplay between carcinogenesis and the efficacy of chemopreventive agents. Studies like these will provide meaningful data before initiating large-scale clinical trials.
Indexed as
Identifiers
37854224PMC10579030W4387764700What OpenQuestion holds
Registered trials
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