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Updated: Nov 4, 2025
Molecular Analysis of Endothelial-mesenchymal Transition Induced by Transforming Growth Factor-β Signaling
Published on: August 3, 2018
Effects of emodin, a plant-derived anthraquinone, on TGF-β1-induced cardiac fibroblast activation and function
Wayne Carver1, Ethan Fix1, Charity Fix1
1Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina, USA.
Abstract:
Cardiac fibrosis accompanies a number of pathological conditions and results in altered myocardial structure, biomechanical properties and function. The signaling networks leading to fibrosis are complex, contributing to the general lack of progress in identifying effective therapeutic approaches to prevent or reverse this condition. Several studies have shown protective effects of emodin, a plant-derived anthraquinone, in animal models of fibrosis. A number of questions remain regarding the mechanisms whereby emodin impacts fibrosis. Transforming growth factor beta 1 (TGF-β1) is a potent stimulus of fibrosis and fibroblast activation. In the present study, experiments were performed to evaluate the effects of emodin on activation and function of cardiac fibroblasts following treatment with TGF-β1. We demonstrate that emodin attenuates TGF-β1-induced fibroblast activation and collagen accumulation in vitro. Emodin also inhibits activation of several canonical (SMAD2/3) and noncanonical (Erk1/2) TGF-β signaling pathways, while activating the p38 pathway. These results suggest that emodin may provide an effective therapeutic agent for fibrosis that functions via specific TGF-β signaling pathways.
Insights
Emodin, a plant compound, reduces cardiac fibroblast activation and collagen buildup in vitro. It impacts transforming growth factor beta 1 (TGF-β1) signaling, suggesting potential as a therapeutic for fibrosis.
Area of Science:
- Cardiology
- Pharmacology
- Biochemistry
Background:
- Cardiac fibrosis alters heart structure and function, complicating treatment.
- Current therapeutic strategies for fibrosis lack efficacy due to complex signaling.
- Emodin, a plant-derived anthraquinone, shows promise in animal fibrosis models.
Purpose of the Study:
- To investigate emodin's effects on cardiac fibroblast activation and function.
- To elucidate the mechanisms of emodin's action in the context of TGF-β1 signaling.
Main Methods:
- In vitro experiments assessing cardiac fibroblast activation and collagen accumulation.
- Analysis of TGF-β1 signaling pathways, including SMAD2/3 and Erk1/2, in response to emodin treatment.
Main Results:
- Emodin significantly attenuated TGF-β1-induced cardiac fibroblast activation.
- Emodin reduced collagen accumulation in vitro.
- Emodin inhibited canonical (SMAD2/3) and noncanonical (Erk1/2) TGF-β signaling pathways.
- Emodin activated the p38 signaling pathway.
Conclusions:
- Emodin demonstrates antifibrotic effects by modulating TGF-β1 signaling in cardiac fibroblasts.
- Emodin's specific impact on canonical and noncanonical pathways suggests a targeted therapeutic mechanism.
- Emodin holds potential as an effective therapeutic agent for treating cardiac fibrosis.
