Related Experiment Video
Updated: Oct 14, 2026

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Inhibition of chemically induced neoplastic transformation by carotenoids. Mechanistic studies
1Cancer Research Center of Hawaii, University of Hawaii, Honolulu 96813.
Abstract:
In 10T1/2 cells several dietary carotenoids have been shown to be capable of inhibiting carcinogen-induced neoplastic transformation. Their action appears qualitatively similar to the previously documented action of retinoids in this cell system. However, higher concentrations (10-1000-fold) are required. Both types of compound were found to strongly upregulate gap junctional intercellular communication at concentrations which inhibit transformation. Upregulation of gap junctional intercellular communication was caused by the increased expression of connexin 43, a junctional protein. This activity of carotenoids and retinoids is highly correlated with, and has been proposed to be mechanistically linked to, inhibition of transformation in 10T1/2 cells. In this model the gap junction serves as a conduit for growth regulatory signals from normal to initiated cells. These putative signals act to suppress transformation of the initiated cell.
More Related Videos
08:19Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
Published on: July 20, 2019
04:12Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)
Published on: December 19, 2019
Related Concept Videos
Inhibition of Cdk Activity
Cancer-Critical Genes I: Proto-oncogenes
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...
Cancer Prevention
Some...
Cancer-Critical Genes II: Tumor Suppressor Genes
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 Activity
Mutagenicity and Carcinogenicity