Related Experiment Video
Updated: Jun 21, 2026
07:51
Refined Murine Model of Idiopathic Pulmonary Fibrosis
Published on: June 17, 2025
Cannabinoids inhibit fibrogenesis in diffuse systemic sclerosis fibroblasts
Estrella Garcia-Gonzalez1, Enrico Selvi, Epifania Balistreri
1Department of Clinical Medicine and Immunological Science, Rheumatology Unit, University of Siena, Siena, Italy. estre79@gmail.com
Rheumatology (Oxford, England)
|July 11, 2009
Summary
Synthetic cannabinoids like WIN55,212-2 show anti-fibrotic activity by reducing extracellular matrix deposition and reversing abnormal fibroblast behavior in diffuse cutaneous systemic sclerosis (dcSSc). This suggests cannabinoids may offer a new therapeutic approach for fibrosis diseases.
Area of Science:
- Fibrosis research
- Endocannabinoid system pharmacology
- Dermatology
Background:
- The endocannabinoid system is implicated in pathological fibrosis.
- Cannabinoid receptor modulation may limit fibrogenesis.
- Diffuse cutaneous systemic sclerosis (dcSSc) is characterized by uncontrolled fibrogenesis.
Purpose of the Study:
- To investigate the effect of the synthetic cannabinoid receptor agonist WIN55,212-2 on fibrogenesis.
- To assess WIN55,212-2's modulation of fibrogenesis in an in vitro model of dcSSc.
Main Methods:
- Assessed cannabinoid receptors CB1 and CB2 expression in dcSSc fibroblasts versus healthy controls.
- Studied the impact of WIN55,212-2 on type I collagen, profibrotic cytokines, fibroblast transdifferentiation, apoptosis, and ERK1/2 pathway activation.
- Utilized increasing concentrations of the synthetic cannabinoid for treatment.
Main Results:
- CB1 and CB2 receptors were over-expressed in dcSSc fibroblasts.
- WIN55,212-2 reduced extracellular matrix deposition and fibroblast abnormalities.
- Fibroblast abnormalities counteracted included transdifferentiation into myofibroblasts and resistance to apoptosis.
- The anti-fibrogenic effect was not reversed by selective cannabinoid antagonists.
Conclusions:
- Cannabinoids possess anti-fibrotic activity.
- WIN55,212-2 demonstrates potential in modulating dcSSc fibrogenesis.
- Cannabinoids may represent a novel class of agents for treating fibrosis diseases.
Related Concept Videos
01:24Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF
Tumor Necrosis Factor (TNF), a proinflammatory cytokine, contributes significantly to the inflammation seen in Crohn's disease. It exists as soluble TNF and membrane-bound TNF, with actions mediated through TNF receptors (TNFR). TNFR activation leads to the release of proinflammatory cytokines, T-cell activation, collagen production, and leukocyte migration, all contributing to inflammation in Crohn's disease. Anti-TNF monoclonal antibodies, namely infliximab (Remicade), adalimumab (Humira),...
01:20The JAK-STAT Signaling Pathway
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
02:26NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
01:09Introduction to Fibroblasts
Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
01:24Cirrhosis II: Pathophysiology
Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...