Emodin Powder CAS 518-82-1

Emodin is often present in the form of free and glycosides in the rhizomes of the Polygonaceae plant Rheum palmatum. High quality Emodin powder is an orange yellow long needle shaped crystal that crystallizes orange in acetone and yellow in methanol, with a special reaction to anthraquinone. Natural Emodine is a natural compound extracted from Chinese herbs such as Rheum palmatum and Polygonum cuspidatum, which has various pharmacological effects such as anti-inflammatory, antiviral, and anti-tumor.

What are the pharmacological mechanisms of action of emodin?

Emodin powder, belonging to the class of hydroxy anthraquinone compounds, often exists in the form of free and glycosides in the rhizomes and roots of Polygonaceae plants such as Rheum palmatum, Rheum palmatum, and Rheum tanguticum. There are also abundant contents in traditional Chinese medicinal herbs such as Polygonum multiflorum and Polygonum multiflorum.
In recent years, a large number of studies have confirmed that emodin has a variety of pharmacological activities such as anti-tumor, anti-inflammatory, immune regulation, antibacterial and antiviral activities, involving liver cancer, colon cancer, pancreatic cancer, non-small cell lung cancer, heart failure, cardiac hypertrophy, myocardial infarction, myocarditis, ischemia reperfusion injury, neurodegenerative diseases, diabetes, osteoporosis and other diseases, and the research of related molecular mechanisms is also increasingly in-depth.

What are the uses of Emodin?

Rhubarb powder is an important component of laxatives. However, it should be noted that although Emodin has laxative activity, its laxative effect is actually very weak due to its susceptibility to oxidative damage in the body. Emodin used in clinical practice usually forms glycosides with sugar to better exert its laxative effect. Emodin-1-O - β - D-glucoside and Emodin-8-O - β - D-glucoside are glycosides that bind to glucose. They only bind at different positions, but they are both the main components of rhubarb. In addition, in clinical practice, emodin also has the following functions:

1. Antitumor effect
According to reports, tumors have become the second leading cause of death in the world after cardiovascular disease, with the number of patients increasing year by year. Research has shown that emodin can exert anti-tumor activity by affecting various stages of tumor development, including cell proliferation, apoptosis, epithelial mesenchymal transition, cell migration, and angiogenesis.
2. Anti inflammatory and immune regulatory effects
Inflammation is a biological response of the immune system that protects organisms from harmful factors. Excessive and uncontrolled inflammation is associated with various destructive chronic diseases. Multiple in vitro and in vivo studies have found that emodin has potential pharmacological effects in the treatment and prevention of various inflammatory diseases.
3. Antibacterial and antiviral effects
Research has shown that emodin can inhibit bacterial invasion by suppressing ERK1/2 phosphorylation and F-actin polymerization. Administration of emodin at doses of 8.75, 17.5, and 35 mg/kg by gavage can alleviate intestinal damage caused by Escherichia coli O1 and improve intestinal mucosal barrier function in mice by increasing the abundance of beneficial bacteria and inhibiting the abundance of harmful bacteria, thereby alleviating diarrhea.
4. Cardioprotective effect
Cardiovascular disease has a high incidence rate and mortality in the world. Multiple studies have shown that emodin has activities such as inhibiting myocardial cell death and anti myocardial hypertrophy, providing experimental evidence for the clinical treatment of cardiovascular diseases.
5. Neuroprotective effect
The pathogenesis of neurological diseases is complex, and studies have shown that emodin has neuroprotective activity, which can potentially treat various neurodegenerative diseases, cerebral ischemia, and other neurological diseases by inhibiting nerve cell death and protecting the blood-brain barrier.
6. Renal protective effect
Emodin can alleviate oxidative stress, inflammation, and extracellular matrix accumulation in high glucose induced mouse glomerular mesangial cells by regulating the large multifunctional peptidase 7 (Lmp7) axis, achieving renal protection. Based on the prediction of network pharmacology and molecular docking technology, emodin plays a role in the treatment of diabetes nephropathy through key targets in signal pathways such as interleukin-17 and MAPK.
7. Bone protective effect
Osteoporosis is a bone disease characterized by impaired bone strength and an increased risk of fractures. Research has shown that administering 30 mg/kg of emodin orally for 10 weeks can inhibit osteoclast formation and improve inflammatory bowel disease induced osteoporosis in rats by suppressing the expression of TRAF6, oncogene proteins, and other proteins.
8. Anti fibrotic effect
The typical feature of liver fibrosis is an imbalance between extracellular matrix synthesis and degradation. Emodin can activate p53 and induce apoptosis of hepatic stellate cells through the p53/ERK/p38 axis, and improve liver fibrosis by modulating MMP-1 and MMP-9 to reshape the extracellular matrix.

What are the relevant studies on the anti-tumor effect of Emodin?

The anti-tumor mechanism of rhubarb is believed by some medical researchers to be the inhibition of cancer cell respiration and DNA biosynthesis, while others believe that rhein and emodin have a direct destructive effect on cancer cells. Although opinions cannot reach a consensus, the inhibitory effect of this product on cancer cells is evident to all.
In comparative studies on the anti-tumor effects of various parts of rhubarb extract, according to relevant clinical data, anthraquinone derivatives, rhein, emodin, and aloe emodin all have significant anti-cancer effects, especially against melanoma, P388 leukemia, and Ehrlich ascites carcinoma. Among them, rhubarb polysaccharides have a significant inhibitory effect on sarcoma S180. Ingesting a certain concentration of emodin can reduce the maximum growth density, division index, and thymidine incorporation of human lung cancer A-549 cells. Compared to normal cells, the DNA content is also significantly lower. In addition, in clinical follow-up, it can be clearly observed that the observation group using Emodin powder for a long time has a relative increase in G1 and S phase cells, a relative decrease in G2+M phase and heteroploid cells, and the peak left rotation of the block plot appears on the lower channel. This fully demonstrates that emodin has a significant inhibitory effect on the division of human lung cancer A-549 cells.

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