Introduction/Overview
Delsoline (CAS number: 509-18-2) is a major alkaloid derived from Delphinium anthriophyllum Hance. As a natural product with significant ganglion blocking effects, berberine has been widely used in traditional Chinese medicine for its effects of dispelling wind, dampness, activating collaterals, and relieving pain in the treatment of diseases such as rheumatism, hemiplegia, indigestion, and cough. In recent years, with the deepening development of natural product pharmacology, the pharmacological activity, mechanism of action, and potential clinical application value of Sophora flavescens alkaloids have gradually attracted attention. Especially in the field of metabolic diseases such as hyperglycemia, berberine has shown great therapeutic potential by regulating multiple molecular targets.
This article will provide a systematic review of the chemical structure and physicochemical properties, plant sources and extraction methods, pharmacological activity, mechanism of action and molecular targets, pharmacological evaluation and pharmacokinetic characteristics of Sophora flavescens alkaloids. Finally, the clinical application prospects will be discussed, providing theoretical basis and reference for subsequent research and drug development.
Chemical structure and physicochemical properties
Hard flying swallow alkaloid is a alkaloid with a complex cyclic structure, with a molecular weight of 467.6030. Its molecular formula and detailed structural formula reflect its polycyclic pyridine skeleton. Its LogP value is 1.3508, indicating that it has moderate lipid solubility, which is beneficial for membrane penetration but not excessively hydrophobic. Its topological polar surface area (TPSA) is 100.85 Å ², indicating that the molecule has certain polar groups that may affect its solubility and interaction with the target.
The water solubility of Sophora flavescens alkaloid is 0.9418, indicating that it has good solubility in water, which is beneficial for absorption and distribution in organisms. The low penetration of the blood-brain barrier suggests that its role in the central nervous system may be limited, which can help reduce the risk of central nervous system related side effects. In addition, berberine does not inhibit hERG channels, reducing its potential risk of cardiac toxicity. The Ames test result is 0.9, indicating a low risk of genotoxicity and a good safety basis.
Plant sources and extraction methods
Hard swallowtail alkaloids mainly exist in Delphinium anthescifolium Hance, a plant belonging to the Ranunculaceae family and widely distributed in some parts of southern China. Huanliang grass is used in traditional Chinese medicine as a medicinal herb for dispelling wind, dampness, activating collaterals, and relieving pain, with a long history of clinical application.
The extraction of alkali from hard flying swallow grass is usually carried out by combining alcohol extraction with acid-base separation. The specific steps include: first, refluxing and extracting the dried powder of Huanliangcao with ethanol or methanol to obtain the crude extract; Subsequently, the alkaloids are converted into salt form through acidification, facilitating the separation of the aqueous phase; Then, the alkaloids are ionized through alkalization and extracted using organic solvents such as chloroform and ethyl acetate. Finally, high-purity sophocarpine was obtained through purification steps such as column chromatography and recrystallization. Modern extraction techniques such as ultrasound assisted extraction and microwave-assisted extraction have also been applied to improve extraction efficiency and purity.
Pharmacological activity research
As a type of alkaloid with ganglion blocking effect, the pharmacological activity of Sophora flavescens alkaloids mainly manifests in the following aspects:
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Neurological function
Hard swallowtail alkaloids can inhibit ganglion conduction, similar to the neurotoxic effect of arrow venom, leading to the blockade of postganglionic fibers, thereby relieving muscle tension and spasms. This mechanism of action demonstrates good efficacy in relieving muscle tension and related pain caused by excessive exercise.
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Antirheumatic and analgesic effects
Huanliang Grass and its main component, Sophora flavescens alkaloids, are used in traditional medicine to treat rheumatism and hemiplegia. Modern pharmacological studies have confirmed that they have anti-inflammatory, analgesic, and blood circulation improving effects, which may be achieved by regulating inflammatory mediators and neural transmission pathways.
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Metabolic regulation effect
In recent years, studies have found that berberine has the potential to regulate blood sugar in models of hyperglycemia. It can regulate glucose metabolism and insulin sensitivity by acting on a variety of metabolism related targets, showing potential anti diabetes activity.
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Other functions
Hard flying swallow grass alkaloids also exhibit certain digestive system regulatory effects, improve digestive symptoms, and have auxiliary therapeutic effects on respiratory diseases such as cough.
Mechanism of action and molecular targets
The multi-target mechanism of action of berberine is the basis for its diverse pharmacological activities. Research on targets related to hyperglycemia has revealed their potential molecular pathways of action:
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EHMT2 (Euchromatic Histone Lysine Methyltransferase 2)
EHMT2 participates in histone methylation regulation of gene expression, affecting the insulin signaling pathway and glucose metabolism. Hard swallowtail alkaloids may improve insulin resistance by regulating EHMT2 activity.
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UBP2 (Ubiquitin-specific protease 2)
As a protein deubiquitinase, UBP2 regulates protein stability and participates in metabolic regulation. Hard swallowtail alkaloids may affect UBP2 mediated protein degradation and regulate levels of metabolism related proteins.
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PAI1 (Plasminogen Activator Inhibitor-1)
PAI1 is a key factor in the blood coagulation and fibrinolysis system, and overexpression is associated with metabolic syndrome. Hard swallowtail alkaloids may improve the hemorheological state by regulating PAI1 expression.
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AMPK (AMP-activated protein kinase)
AMPK is a central regulator of cellular energy metabolism, and activation of AMPK helps promote glucose uptake and fatty acid oxidation. Hard swallowtail alkaloids activate the AMPK pathway, enhance energy metabolism, and improve hyperglycemia.
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SGLT2 (Sodium-glucose cotransporter 2)
SGLT2 regulates renal glucose reabsorption, and inhibiting SGLT2 helps to lower blood sugar. Hard flying swallow alkaloids may exert hypoglycemic effects by inhibiting SGLT2.
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GCK (Glucokinase)
GCK is a key enzyme in glycolysis, regulating blood glucose homeostasis. Hard flying swallow alkaloids may enhance GCK activity and promote glucose metabolism.
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APP (amyloid precursor protein) and BACE1 (Beta site APP cleansing enzyme 1)
These two targets are associated with neurodegenerative diseases, and the regulation of them by berberine may involve neuroprotective effects.
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CES1 (Carboxylesterase 1) and PTPN1 (Protein tyrosine phosphatase non receptor type 1)
CES1 is involved in drug metabolism, PTPN1 regulates the insulin signaling pathway, and the effect of berberine on these targets helps improve insulin sensitivity and pharmacokinetics.
In summary, the complex pharmacological network of Sophora flavescens alkaloids is demonstrated by their synergistic effects on multiple targets and pathways, regulating metabolism, nerves, and inflammatory responses.
Evaluation of drug properties and pharmacokinetics
The pharmacological parameters of Sophora flavescens alkaloids indicate that they have good potential for drug development. The medium molecular weight (467.6 Da) and moderate LogP value (1.35) comply with Lipinski's rule, which is beneficial for oral absorption. A higher TPSA (100.85 Å ²) suggests a certain polarity, which may affect membrane permeability, but its good water solubility (0.9418) facilitates in vivo distribution.
The low penetration of the blood-brain barrier reduces the risk of central nervous system side effects, but may limit its application in central nervous system diseases. The hERG channel has no inhibitory effect and reduces the risk of cardiac toxicity. Ames test results show that the genotoxicity risk is low and the overall safety is good.
In terms of pharmacokinetics, the absorption, distribution, metabolism, and excretion (ADME) characteristics of Sophora flavescens alkaloids still require systematic research. Preliminary data indicates that its oral bioavailability is moderate, and liver metabolism is mainly completed through enzymatic reactions. The activity and toxicity of metabolites need further evaluation. Its lower blood-brain barrier penetration may be related to molecular polarity and structure, and its pharmacokinetic performance can be optimized through structural modification in the future.
Clinical application prospects and prospects
As the main active ingredient of traditional medicinal plants, hard flying swallow alkaloids have multiple pharmacological effects and good safety basis, and have a wide range of clinical application potential:
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Neuromuscular disorders
By utilizing its ganglion blocking effect, berberine can be used to alleviate muscle spasms, muscle tension and related pain caused by excessive exercise, and is suitable for fields such as rheumatic diseases and hemiplegia rehabilitation.
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Metabolic disease treatment
For hyperglycemia and diabetes, delphinidine can improve insulin sensitivity and glucose metabolism by regulating multiple targets, and can be developed as a new natural hypoglycemic drug in the future.
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Anti inflammatory and analgesic effects
Its anti-inflammatory effect provides a new therapeutic approach for rheumatism and chronic inflammatory diseases, and combined with modern drug delivery technology, it is expected to improve efficacy and safety.
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neuroprotection
The regulation of APP and BACE1 suggests their potential application value in neurodegenerative diseases, which deserves further exploration.
Future research should focus on the pharmacokinetic optimization, formulation development, and clinical trial validation of berberine, combined with modern molecular biology and medicinal chemistry techniques, to promote its clinical application.
Conclusion
As an important alkaloid in Huanliang grass, the hard flying swallow alkaloid has shown broad application prospects in the fields of neuromuscular diseases, metabolic diseases, and inflammatory diseases due to its unique chemical structure and multi-target pharmacological activity. Its good pharmacokinetic parameters and safety have laid the foundation for the development of new drugs. In the future, through in-depth mechanism research and clinical validation, Sophora flavescens alkaloids are expected to become important candidate molecules in the development of natural product drugs, providing new strategies and choices for the treatment of related diseases.
