Introduction/Overview
Deacylmeldaplexigenin (CAS number: 3513-04-0) is a typical natural product of pregnane glycosides, first isolated from the plant Asclepias incarnata in the Ranunculaceae family. Pregnane glycoside compounds play an important role in natural medicinal chemistry and pharmacology research due to their unique chemical structure and diverse biological activities. In recent years, with the in-depth analysis of tumor molecular mechanisms, deacetylated quercetin has gradually become a research hotspot due to its potential inhibitory effect in tumor models such as prostate cancer. Prostate cancer is a malignant tumor with high incidence rate and difficult treatment in male urinary system. It is urgent to find new effective and low toxic drugs. This article will provide a systematic review of the chemical structure, plant origin, pharmacological activity, mechanism of action, and pharmacological evaluation of acyl glucosinolates, aiming to provide theoretical basis and research direction for their clinical development and application.
Chemical structure and physicochemical properties
The deacetylated quercetin glycoside belongs to the pregnane glycoside class of compounds, which is composed of a pregnane steroid skeleton and a glycoside moiety. Its molecular formula is C2H32O7 and its molecular weight is 364.4700. Structurally, the deacetylated quercetin glycoside removes the acyl portion of quercetin, retaining the core steroid structure and multiple hydroxyl groups, endowing it with high polarity and biological activity.
In terms of physical and chemical properties, the LogP value of deacetylated kaempferol glycoside is 1.7, indicating its moderate lipid solubility, which is beneficial for membrane penetration and in vivo distribution. The polar surface area (TPSA) is 110.87 Å ² and the number of hydrogen bond acceptors is 6, indicating that it may participate in various molecular interactions through hydrogen bonds in vivo. The low permeability of the blood-brain barrier suggests its limited distribution in the central nervous system. Toxicological evaluation shows no hepatotoxicity and hERG channel inhibitory activity, with high safety. However, cardiac toxicity and Ames mutagenicity are not yet clear and require further research.
Plant sources and extraction methods
The main source of deacetylated quercetin is Asclepias incarnata (Ranunculaceae), which is widely distributed in wetlands in North America and is a commonly used medicinal plant in traditional Chinese medicine. Its roots, stems, and leaves all contain various pregnane glycosides, among which deacetylated quercetin is one of the important active ingredients with high content and pharmacological activity.
During the extraction process, alcohol extraction (such as ethanol or methanol) is often used to extract the dried plant powder, followed by separation and purification techniques such as liquid-liquid distribution and column chromatography (silica gel or C18 reverse phase column) to obtain high-purity deacetylated quercetin. Modern separation techniques such as high-performance liquid chromatography (HPLC) and mass spectrometry (LC-MS) are widely used for their qualitative and quantitative analysis, ensuring the quality and batch stability of extracts.
Pharmacological activity research
The pharmacological activity research of deacetylated puerarin mainly focuses on its anti-tumor effect, especially in prostate cancer models. Multiple in vitro cell experiments have shown that deacetylated quercetin can significantly inhibit the proliferation, migration, and invasion ability of prostate cancer cells, while inducing cell apoptosis and cell cycle arrest.
In addition, deacetylated quercetin also exhibits multiple biological activities such as anti-inflammatory and antioxidant effects, which provide auxiliary mechanism support for its anti-tumor effect. For example, its regulation of oxidative stress-related signaling pathways can help alleviate inflammatory responses in the tumor microenvironment and inhibit the malignant progression of tumor cells.
Although there is currently limited research on the in vivo efficacy and toxicology of deacetylated quercetin, existing animal model experiments have preliminarily demonstrated its good safety and significant anti-tumor potential, laying the foundation for subsequent drug development.
Mechanism of action and molecular targets
The mechanism of action of deacetylated puerarin in prostate cancer involves multiple key molecular targets, reflecting its multi-target regulatory characteristics. The main targets include:
- BCL2 As an anti apoptotic protein, downregulation of BCL2 promotes cancer cell apoptosis, and deacetylated quercetin activates the apoptotic pathway by inhibiting BCL2 expression.
- PTPN1 Protein tyrosine phosphatase 1 regulates multiple signaling pathways, and deacetylated quercetin may affect cell proliferation and metabolism by modulating PTPN1 activity.
- STAT3 Signal transduction and transcriptional activation factor 3 is involved in the growth and immune escape of tumor cells, and deacetylated quercetin inhibits STAT3 phosphorylation, blocking its transcriptional activity.
- ESR2(Estrogen receptor beta): Regulating hormone dependent tumor growth, deacetylated quercetin may intervene in the endocrine environment of prostate cancer by modulating ESR2 signaling.
- NFE2L2(NRF2): Regulating the antioxidant stress response, deacetylated quercetin activates the NFE2L2 pathway, enhances cellular antioxidant capacity, and reduces oxidative damage.
- MAPK1 Mitogen activated protein kinase is involved in cell proliferation and differentiation, and deacetylated quercetin inhibits tumor cell proliferation by regulating MAPK1 signaling.
- CYP19A1(Aromatase): Catalyzes estrogen synthesis, affects hormone levels, and the regulation of CYP19A1 by deacetylated puerarin helps to inhibit hormone dependent tumor growth.
- AR(Androgen receptor): An important driver of prostate cancer, deacetylated quercetin inhibits hormone dependent proliferation of cancer cells by interfering with the AR signaling pathway.
- PIK3CA The key subunit of the PI3K signaling pathway regulates cell survival and metabolism, and deacetylated quercetin inhibits PIK3CA activity, blocking signal transduction.
- LGALS3(galectin-3): Involved in cell adhesion and tumor metastasis, deacetylated quercetin inhibits tumor cell invasion and metastasis by regulating LGALS3 expression.
The above multi-target mechanism of action shows that deacetylated quercetin not only directly inhibits tumor cell proliferation, but also achieves comprehensive anti-tumor effects by regulating the tumor microenvironment and signaling network.
Evaluation of drug properties and pharmacokinetics
The pharmacological parameters of deacetylated puerarin indicate that it has good potential for drug development. The moderate molecular weight (364.47 Da) and LogP value (1.7) comply with Lipinski's rule, which is beneficial for in vivo absorption and distribution. A higher TPSA (110.87 Å ²) and hydrogen bond acceptor count (6) suggest good water solubility, facilitating transport in the bloodstream.
The low permeability of the blood-brain barrier reduces the risk of central nervous system toxicity and side effects. The liver toxicity and hERG channel inhibition experiments were both negative, indicating a high level of liver and liver safety and reducing safety hazards in drug development.
However, the data on cardiac toxicity and genotoxicity (Ames test) are not yet clear, and further validation is needed through in vitro and in vivo experiments. In addition, there is a lack of systematic research on the pharmacokinetic characteristics of deacetylated quercetin, such as absorption rate, bioavailability, metabolic pathways, and excretion mode. In the future, animal models and preclinical trials need to be conducted to improve relevant data.
Clinical application prospects and prospects
Based on the multi-target inhibitory effect and good safety evaluation of deacetylated quercetin in prostate cancer cells, its development prospects as an anti-tumor candidate drug are broad. Future research can focus on:
- Pharmacodynamic and pharmacokinetic studies The system evaluates its in vivo distribution, metabolic stability, and duration of drug efficacy to provide a basis for clinical dose design.
- Combination therapy strategy Exploring the synergistic effects of deacetylated puerarin with endocrine therapy, chemotherapy, or immunotherapy in combination with existing prostate cancer treatment drugs.
- Structural modification and drug design Based on the core structure of pregnensin, chemical modification is carried out to optimize its pharmacokinetic properties and targeting selectivity, thereby enhancing therapeutic efficacy.
- Preclinical safety evaluation Conduct long-term toxicology and mutagenicity studies to ensure the safety of clinical applications.
- Indications expansion Given its multi-target regulatory ability, explore the potential application of deacetylated puerarin in other hormone dependent tumors and inflammation related diseases.
In summary, as a natural pregnane glycoside compound, deacetylated quercetin has unique pharmacological activity and good pharmacological properties, making it a highly promising natural drug lead compound in the field of prostate cancer treatment.
Conclusion
As a natural product of pregnane glycosides derived from Asclepias incarnata, deacetylated rosmarin has shown potential in the treatment of prostate cancer due to its multi-target anti-tumor mechanism and good safety performance. The unique chemical structure and physicochemical properties provide favorable conditions for drug design. Although there is still insufficient research on its pharmacokinetics and preclinical safety, with the advancement of molecular biology and medicinal chemistry techniques, deacetylated quercetin is expected to become a representative of the new generation of natural anticancer drugs. In the future, it is necessary to strengthen its mechanism research and clinical translation, promote its transition from laboratory to clinical, and benefit patients.