Related Experiment Video

Updated: Jun 14, 2026

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro
12:00

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Published on: July 5, 2017

Black tea polyphenols-mediated in vivo cellular responses during carcinogenesis

G Kumar1, S P Pillare, G B Maru

  • 1Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre (TMC), Kharghar, Navi Mumbai-410 210, India. gmaru@actrec.gov.in

Mini Reviews in Medicinal Chemistry
|April 8, 2010
PubMed

Insights

Black tea polyphenols (BTPs) show chemopreventive effects by inhibiting cancer initiation, promotion, and progression. These oligomeric and polymeric compounds act through diverse molecular pathways and genes in vivo.

Area of Science:

  • Phytochemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Green tea polyphenols' chemopreventive effects are well-documented.
  • Limited information exists on the chemopreventive mechanisms of black tea polyphenols (BTPs), which are oligomeric and polymeric compounds.
  • Black tea (Camellia sinensis) is a widely consumed beverage globally.

Purpose of the Study:

  • To review and compile evidence on the chemopreventive efficacy of black tea extract (BTE) and BTPs.
  • To describe the mechanisms of action of BTPs in inhibiting cancer initiation, promotion, and progression.
  • To focus on in vivo experimental systems.

Main Methods:

  • Literature review and compilation of existing studies.
  • Analysis of in vivo experimental data on BTE and BTPs.
  • Focus on mechanisms of anti-initiating, anti-promoting, and anti-progressor actions.

Main Results:

  • Black tea polyphenols (BTPs) demonstrate significant chemopreventive efficacy.
  • BTPs exhibit anti-initiating, anti-promoting, and anti-progressor activities in vivo.
  • The inhibitory mechanisms of BTPs are diverse, affecting multiple molecular pathways and genes.

Conclusions:

  • Black tea polyphenols represent a promising area for cancer chemoprevention research.
  • Further investigation into the specific molecular targets of BTPs is warranted.
  • BTPs' broad-spectrum activity suggests potential therapeutic applications.

More Related Videos

Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)04:12

Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)

Published on: December 19, 2019

Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling09:33

Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling

Published on: March 20, 2018

Related Concept Videos

Mutagenicity and Carcinogenicity01:25

Mutagenicity and Carcinogenicity

Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
Cancer Prevention02:59

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...