Introduction/Overview
Bacopa saponin C (CAS number 178064-13-6) is a natural triterpenoid saponin derived from the traditional medicinal plant Bacopa monniera. Pseudopurslane is widely used in the Ayurveda system of traditional Indian medicine, mainly for the adjuvant treatment of various diseases such as cognitive impairment, neurodegenerative diseases, and anti-inflammatory effects. In recent years, with the deepening of natural product pharmacology and molecular pharmacology research, the saponin C of Portulaca oleracea has received high attention from the academic community due to its unique biological activity and good oral activity. It has shown significant pharmacological potential in the fields of anti-tumor, antiparasitic, and multidrug resistance related protein regulation, especially in the treatment research of malignant tumors such as pancreatic tumors.
This article aims to systematically review the chemical structure and physicochemical properties, plant sources and extraction methods, pharmacological activity and mechanism of action, pharmacological evaluation and pharmacokinetic characteristics of saponins C from Portulaca oleracea, and explore its clinical application prospects and development directions, providing theoretical basis and reference for subsequent basic research and drug development.
Chemical structure and physicochemical properties
Pseudopurslane saponin C is a typical triterpenoid saponin with a molecular weight of 995.0700. Its chemical structure contains polysaccharide chains that bind to triterpenoid parent nuclei, exhibiting highly polar characteristics. Its LogP value is -2.0000, indicating that the molecule has strong hydrophilicity and is not easily able to pass through lipid membranes. Its polar surface area (TPSA) is as high as 270.83 Å ², and the number of hydrogen bond acceptors is 17, further verifying its high polarity and rich ability to form hydrogen bonds.
Structurally, the saponin C of Portulaca oleracea is composed of a triterpenoid mother nucleus connected to multiple sugar residues through glycosidic bonds. The diversity of sugar residues and the modification of the mother nucleus endow it with unique biological activity. Its high structural complexity and large molecular weight limit its ability to penetrate the blood-brain barrier (BBB prediction is negative), which may pose certain limitations on the role of the central nervous system.
In terms of physical and chemical properties, the water solubility of saponin C from Portulaca oleracea is good, but its large molecular weight and polarity affect its oral bioavailability to some extent. The stability, solubility, and binding properties with biomolecules of this compound are important determinants of its pharmacokinetic behavior, and further research is needed.
Plant sources and extraction methods
Bacopa monniera saponins C are mainly isolated from Bacopa monniera. Pseudopurslane is a perennial herbaceous plant widely distributed in the Indian subcontinent and Southeast Asia. The whole plant and roots of this plant contain abundant triterpenoid saponins, especially saponins with similar structures such as A, B, and C from Portulaca oleracea.
The traditional method for extracting saponins C from Portulaca oleracea mainly includes the following steps:
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Raw material pretreatment Collect dried whole plant of Portulaca oleracea and grind it to an appropriate particle size to increase the solvent contact area.
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Solvent extraction Using polar organic solvents such as methanol or ethanol for reflux or ultrasound assisted extraction, the extraction time and temperature are optimized according to experimental conditions.
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Crude extract concentration Obtain a concentrated crude extract by reducing pressure and concentrating to remove organic solvents.
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Separation and purification Using column chromatography techniques (such as silica gel column, reverse phase C18 column) combined with gradient elution, extract saponins C from Portulaca oleracea. High performance liquid chromatography (HPLC) and mass spectrometry (MS) techniques are used for purity detection and structural confirmation.
In recent years, the application of supercritical fluid extraction and membrane separation technology has provided new ideas for the efficient extraction and purification of saponins C from Portulaca oleracea, significantly improving yield and purity and reducing production costs.
Pharmacological activity research
Pseudopurslane saponin C exhibits various pharmacological activities, including anti-tumor, antiparasitic, and multidrug resistance protein regulation.
1. Antitumor activity
Pseudopurslane saponin C exhibits inhibitory effects on various tumor cell lines, especially in sarcoma and pancreatic tumor models, showing significant anti proliferative and pro apoptotic effects. Its mechanism of action involves regulating the cell cycle, inducing cell apoptosis, and inhibiting tumor related signaling pathways. Related studies have shown that saponins C from Portulaca oleracea can inhibit the growth and metastasis of tumor cells by affecting transcription factors such as STAT3 and RELA, as well as regulatory proteins such as PTPN1 and SIRT1.
2. Antiparasitic activity
Pseudopurslane saponin C exhibits a good inhibitory effect on the parasite Leishmania donovani, indicating its potential application value in the treatment of leishmaniasis. This activity may be related to its regulation of parasite energy metabolism and membrane protein function, but the specific mechanism still needs further clarification.
3. Regulation of multidrug resistance proteins
Pseudopurslane saponin C can inhibit the activity of P-glycoprotein (P-gp) ATPase stimulated by the drug Verapamil, with an IC50 of 57.83 μ g/mL. P-gp, as an important efflux pump on the cell membrane, is involved in the efflux and resistance formation of various drugs. The inhibitory effect of purslane saponin C on P-gp suggests its potential adjuvant therapeutic role in overcoming tumor multidrug resistance (MDR).
Mechanism of action and molecular targets
The pharmacological effects of purslane saponin C involve multiple molecular targets and signaling pathways, especially exhibiting multi-target regulatory characteristics in complex disease models such as pancreatic tumors.
1. Key molecular targets
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APP (Amyloid precursor protein)Participating in cell signaling and apoptosis regulation, the saponin C of Portulaca oleracea may affect tumor cell survival by regulating APP expression.
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PTPN1 (Protein tyrosine phosphatase non-receptor type 1)Regulating multiple signaling pathways and participating in the proliferation and metabolic regulation of tumor cells.
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STAT3 (Signal transducer and activator of transcription 3)As an important regulatory factor for tumor cell proliferation and immune escape, purslane saponin C blocks tumor signaling by inhibiting the activation of STAT3.
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ABCB1 (ATP binding cassette subfamily B member 1)P-gp, which participates in drug efflux, regulates its activity to help overcome tumor resistance.
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PRKCA (Protein kinase C alpha)Regulating cell proliferation and apoptosis, pseudopurslane saponin C may affect the fate of tumor cells by regulating PRKCA.
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CLEC4E (C-type lectin domain family 4 member E)Participate in immune regulation and may affect the tumor microenvironment.
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IDH1 (Isocitrate dehydrogenase 1)Metabolic enzymes regulate the metabolic status of cells.
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SIRT1 (Sirtuin 1)Deacetylase, involved in cellular stress response and metabolic regulation.
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PAX8 (Paired box gene 8)Transcription factors regulate cell differentiation and tumorigenesis.
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RELA (p65 sub unit of NF - κ B)The key inflammatory and tumor signaling factor, purslane saponin C, reduces the inflammatory response and survival ability of tumor cells by inhibiting RELA activity.
2. Analysis of the mechanism of action
Pseudopurslane saponin C achieves its pharmacological effects through multi-target and multi pathway synergistic effects. Its anti-tumor mechanism mainly includes:
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Inhibiting tumor cell proliferation and inducing cell apoptosis involve the regulation of cell cycle proteins and changes in the expression of apoptosis related proteins.
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Inhibiting the STAT3 and NF - κ B signaling pathways weakens the immune escape and inflammatory environment of tumor cells.
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Regulating P-gp activity, overcoming multidrug resistance in tumor cells, and improving the efficacy of chemotherapy drugs.
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Affects tumor metabolic enzymes IDH1 and deacetylase SIRT1, and intervenes in metabolic reprogramming of tumor cells.
In addition, its anti parasitic activity may be achieved by disrupting the parasite's membrane structure and energy metabolism pathways.
Evaluation of drug properties and pharmacokinetics
The pharmacological characteristics of saponins C from Portulaca oleracea have certain challenges:
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High molecular weight (995.07 Da)Exceeding the recommended range of traditional "drug similarity rules" may affect oral absorption and membrane permeability.
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The LogP value is -2.0 It shows strong hydrophilicity, which limits its lipophilic penetration ability, especially the blood-brain barrier penetration ability is predicted to be negative.
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TPSA up to 270.83 Å ²This indicates that its polarity is high, which may lead to a decrease in oral bioavailability.
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Up to 17 hydrogen bond acceptors Although it is beneficial for binding to the target, it may increase metabolic instability and excretion rate.
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Toxicity assessment is not yet complete The liver toxicity, cardiac toxicity (hERG inhibition), and mutagenicity (Ames test) are not clear, and further systematic safety evaluation is needed.
In terms of pharmacokinetics, there is currently a lack of systematic in vivo absorption, distribution, metabolism, and excretion (ADME) data. Preliminary studies have shown that saponin C from Portulaca oleracea has certain biological activity after oral administration, indicating its stable existence in vivo. However, its metabolic pathway, half-life, and tissue distribution still need further research.
In response to its pharmacological limitations, its bioavailability and targeting can be improved through structural modification, nanocarrier encapsulation, and combination therapy strategies.
Clinical application prospects and prospects
Due to its multi-target regulatory ability and extensive pharmacological activity, the saponin C from Portulaca oleracea has shown great potential in the fields of anti-tumor, antiparasitic, and multidrug resistance reversal. Especially in the adjuvant therapy of high mortality malignant tumors such as pancreatic tumors, purslane saponin C is expected to serve as a novel natural drug or drug candidate molecule, improving patient prognosis.
The key to future clinical applications lies in:
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safety assessment The system conducts liver and kidney toxicity, cardiac toxicity, and genetic toxicity tests to ensure medication safety.
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Pharmacokinetic optimization By improving drug formulations and innovating delivery routes, we aim to enhance oral bioavailability and targeting.
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In depth study of mechanisms Combining modern molecular biology techniques, elucidate its interactions with key molecular targets and signal pathway regulatory networks.
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Preclinical and clinical trials Establish animal models and human trials to verify their efficacy and safety, laying the foundation for clinical promotion.
In addition, the anti parasitic activity of saponins C from Portulaca oleracea also provides a new research direction for its application in the prevention and control of tropical and parasitic diseases.
Conclusion
As a natural triterpenoid saponin with rich pharmacological activity, Pseudopurslane Saponin C exhibits multi-target and multi mechanism therapeutic potential, especially in the fields of anti-tumor and antiparasitic effects. Although there are certain limitations to its pharmacological properties, it is expected to overcome these challenges and promote its clinical application through modern medicinal chemistry and formulation methods. Future research should focus on the systematic analysis of its mechanism of action, safety evaluation, and pharmacokinetic optimization, in order to fully leverage the value of purslane saponin C in natural drug development and promote it as an important candidate for the new generation of multifunctional drugs.