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Storage conditions：Short-term storage at 2~8℃, long-term storage at -20 ~ -80℃
Licorice (Glycyrrhiza spp.), as a traditional Chinese medicinal material, has long attracted significant attention in scientific research and clinical practice due to its diverse pharmacological activities and abundant natural product components. Glycoricone (CAS No.: 161099-37-2) is a phenolic natural compound isolated from licorice root. In recent years, it has become a hot topic in pharmacological research due to its unique biological activity. Glycyrrhizone not only exhibits monoamine oxidase (MAO) inhibitory activity but also has estrogen receptor (ER) antagonism, indicating potential multi-target pharmacological effects. Especially in the anti-ulcer field, glycyrrhizone exerts significant protective effects by modulating multiple related targets, suggesting its potential application in the treatment of gastrointestinal diseases.
This paper aims to systematically review the chemical structure and physicochemical properties, plant origin, and extraction methods of glycyrrhizone, deeply analyze its pharmacological activity and mechanism of action, evaluate its druggability parameters and pharmacokinetic characteristics, and explore its clinical application prospects and future research directions, providing theoretical basis and reference for the drug development and clinical translation of glycyrrhizone.
Glycyrrhizone is a phenolic compound with a molecular formula of C21H20O6 and a molecular weight of 368.3850. Its chemical structure contains multiple hydroxyl and phenol hydroxyl groups, giving it strong polarity and biological activity. The LogP value of glycyrrhizone is 3.4405, indicating moderate lipid solubility, which facilitates cell membrane penetration and distribution in vivo. The polar surface area (TPSA) is 100.1300, indicating that its molecules have certain polar characteristics that facilitate binding to biological macromolecules such as enzymes and receptors.
Low water solubility (0.0892 mg/mL) limits its solubility in the aqueous phase and may affect oral bioavailability. The blood-brain barrier has relatively low permeability, suggesting limited distribution in the central nervous system, which may reduce central side effects. The hERG channel inhibition test was negative, indicating that glycyrrhizone carries a lower risk of cardiotoxicity. The Ames-induced mutagenic test scored 0.6, indicating a low genotoxicity risk and meeting preliminary safety requirements.
In summary, glycyrrhizone has moderate physicochemical properties and certain drug development potential, but its water solubility and bioavailability still need optimization.
Licyrrhizone mainly comes from the roots of licorice plants, which are widely distributed in Asia, Europe, and North America. Licorice root contains various active ingredients, including glycyrrhizic acid, licorice flavonoids, and various phenolic compounds, among which glycyrrhizone is one of them.
Common methods for extracting glycyrrhizone include solvent extraction, column chromatography separation, and high-performance liquid chromatography (HPLC) purification. First, ethanol or methanol is used for reflux extraction of dried licorice roots. After concentration, the extract is separated by silica gel column chromatography. Combined with gradient elution technology, glycyrrhizone can be effectively isolated. Purification and quantitative analysis are further performed using reversed-phase HPLC to ensure the purity and quality of the extracts.
In recent years, ultrasound-assisted extraction and microwave-assisted extraction technologies have also been applied to glycyrrhizone extraction, significantly improving extraction efficiency and yield. In addition, the use of green solvents such as ethyl acetate and ethanol aligns with the modern concept of environmentally friendly extraction from natural products.
Glycyrrhizone exhibits an inhibitory effect on monoamine oxidase, with an IC50 of about 140 μM. Monoamine oxidase, as a key enzyme in neurotransmitter metabolism, is involved in the pathological processes of various neuropsychiatric diseases. Glycyrrhizone may regulate brain monoamine neurotransmitter levels by inhibiting MAO activity, offering potential antidepressant and neuroprotective effects. Although its MAO inhibitory activity is moderate, combined with its low blood-brain barrier permeability, it suggests that its effects may be more manifested in peripheral or local tissues.
Glycyrrhizone can bind to estrogen receptors and exhibits estrogen antagonist activity. This characteristic gives it potential application value in hormone-related diseases such as breast cancer and endometriosis. By blocking the ER signaling pathway, glycyrrhizone may inhibit the proliferation of estrogen-dependent cells, exerting antitumor effects.
Glycyrrhizone has shown significant protective effects in ulcer research. Its targets cover a variety of gastrointestinal-related molecules, including:
Through multi-target coordinated regulation, glycyrrhizone effectively alleviates the pathological progression of gastric ulcers and related gastrointestinal diseases.
The pharmacological effects of glycyrrhizone involve multiple signaling pathways and multiple molecular targets, reflecting its multi-target and multi-mechanism characteristics.
Glycyrrhizone binds to the active site of MAO enzymes, inhibiting its catalytic activity of monoamine neurotransmitter oxidation, prolonging the duration of neurotransmitter action in the synaptic cleft, and regulating nervous system function. Although its inhibitory effect is not as strong as that of classic MAO inhibitors, combined with low blood-brain barrier permeability, it may exert regulatory effects in the peripheral nervous system or other tissues.
After glycyrrhizone binds to ER, it blocks the transcriptional activity activated by estrogen, suppresses the expression of estrogen-dependent genes, and thereby suppresses cell proliferation and promotes apoptosis. This mechanism provides a theoretical basis for the potential application of glycyrrhizone in the treatment of hormone-related tumors.
Glycyrrhizone regulates the gastrointestinal environment through multiple targets:
These functions together maintain the integrity of the gastric mucosa and prevent and repair ulcer lesions.
The druggability parameters of glycyrrhizone indicate that it has certain potential for drug development:
Currently, pharmacokinetic studies of glycyrrhizone are limited. Preliminary data indicate that its oral absorption rate is moderate, metabolism mainly occurs through hepatic enzyme systems, and its half-life is moderate. In the future, further systematic pharmacokinetic and toxicological studies are needed to clarify its in vivo behavior and safety.
With its multi-target pharmacological activity, especially its potential in ulcer and hormone-related diseases, glycyrrhizone has promising clinical application prospects.
Future research should focus on:
As an important phenolic active component in licorice, glycyrrhizone demonstrates unique multi-target pharmacological activity, especially showing great potential in the fields of ulcer and hormone-related diseases. Its reasonable physicochemical properties and good safety lay the foundation for drug development. In the future, through in-depth mechanistic research, drug design optimization, and clinical validation, glycyrrhizone is expected to become an innovative class of natural product drugs, offering new options for the treatment of related diseases. The ongoing development of natural product pharmacology will drive the application of glycyrrhizone and its derivatives in modern medicine to new heights.
