Sanqi saponin Ft1: modern analysis from traditional Chinese medicine to multi-target candidate drugs
1. Overview
Notoginsenoside Ft1 is a traditional and precious Chinese medicinal herb, Panax notoginseng(Panax notoginseng)The monomeric compounds of dammarane type triterpenoid saponins isolated from the middle. Its CAS number is 155683-00-4, molecular formula is C47H80O17, and molecular weight is as high as 917.1400 g/mol. It belongs to a natural product with complex structure and diverse biological activities. In recent years, with the deepening development of natural product chemistry and molecular pharmacology, Panax notoginseng saponin Ft1 has emerged as a research hotspot among numerous Panax notoginseng saponins due to its broad and unique pharmacological activities. Existing research indicates that it not only has the traditional "promoting blood circulation and removing blood stasis" related properties of Sanqi, but also angiogenesis and Procoagulant The dual regulatory effect has shown great potential in anti-tumor, neuroprotective, anti-inflammatory, renal protection, and metabolic disease intervention. Its mechanism of action involves PI3K/AKT/mTOR、MAPK Regulating multiple key signaling pathways and being able to act on Corticosteroid receptor (GR)、Estrogen receptor beta (ER β)、TGR5 bile acid receptor Waiting for multiple targets reflects the synergistic effects of natural products with multiple components, targets, and pathways. This article will provide a systematic and professional interpretation of this star molecule from its chemical structure, traditional sources, modern pharmacological mechanisms, drug evaluation, and future prospects.
2. Chemical structure and physicochemical properties
The chemical structure of Panax notoginseng saponin Ft1 is the material basis for its biological activity. The SMILES string provides a detailed description of its complex stereoisomerism: it is a saponin molecule composed of a dammarane type tetracyclic triterpene as a aglycone, connected by three sugar chains (possibly including glucose, xylose, etc.). This highly glycosylated structure determines its strong hydrophilicity.
From the perspective of pharmacological parameters:
- Molecular weight (MW)917.14, far beyond the scope of conventional small molecule drugs (usually<500 Da), poses challenges for its oral absorption and transmembrane transport.
- Lipid water partition coefficient (LogP/LogD)Approximately 2.49. This value indicates that the compound has a certain degree of lipophilicity, but considering its large molecular weight and polarity, its overall properties are more inclined towards amphiphilicity. This is consistent with the surfactant properties of its saponins.
- Topological Polarity Surface Area (TPSA)Up to 277.91 Å ². The TPSA value is often related to the hydrogen bonding ability and membrane permeability of the compound. Generally, compounds with TPSA>140 Å ² have lower oral bioavailability. The extremely high TPSA value of Panax notoginseng saponin Ft1 is mainly due to the large number of hydroxyl groups and oxygen atoms on the sugar ring in its molecule, which strongly suggests its Poor cell membrane permeability It is difficult to enter cells through passive diffusion.
- Water solubility:0.0742 mg/mL, Belonging to micro solubility. This is contradictory to its high TPSA and sugar based structure, possibly due to its complex spatial structure and high molecular weight leading to tight crystal packing and slow dissolution kinetics. In practical applications, it may be necessary to improve its solubility and bioavailability through formulation techniques such as making nanoparticles, phospholipid complexes, etc.
- Caco-2 permeability 0.1773, a low value, confirms the prediction of poor intestinal absorption.
In summary, Panax notoginseng saponin Ft1 is a typical "macromolecular" natural saponin, characterized by high polarity, high TPSA, and low membrane permeability. These physicochemical properties are the decisive factors in its pharmacokinetic behavior and also the main technical bottlenecks that need to be overcome in its development into oral drugs.
3. Plant sources and traditional applications
Sanqi saponin Ft1 is derived from plants of the Panax genus in the Araliaceae family Sanqi(Panax notoginseng (Burk.) F. H. Chen)Dry roots and rhizomes. Sanqi is mainly produced in Wenshan, Yunnan, China. It is also known as "Tianqi" or "Jin Bu Huan" and has a long history of medicinal use. It was first recorded in Li Shizhen's "Compendium of Materia Medica" during the Ming Dynasty and is described as a "divine medicine for stopping bleeding and a wonderful product for regulating blood flow".
In traditional Chinese medicine theory, Sanqi has a warm nature, a sweet and slightly bitter taste, and belongs to the liver and stomach meridians. It is skilled in its functions Relieve blood stasis and stop bleeding, reduce swelling and relieve pain Traditionally, it is mainly used to treat various types of bleeding (such as hemoptysis, vomiting blood, epistaxis, rectal bleeding, and collapse) as well as injuries caused by falls, bruises, swelling, and pain. There are many similarities between the concepts of "promoting blood circulation and removing blood stasis" in traditional Chinese medicine theory and "improving microcirculation, anti thrombotic, anti-inflammatory, and promoting tissue repair" in modern medicine. Modern pharmacological research on Panax notoginseng has confirmed that its core active ingredients are various saponin compounds represented by Panax notoginseng saponin Ft1, as well as Panax notoginseng saponins, flavonoids, polysaccharides, and so on.
Traditionally, Sanqi is mostly consumed in powder form or applied externally. Modern preparations include injections such as Xuesaitong and Xueshuantong, as well as various capsules and tablets, which are widely used in the prevention and treatment of cardiovascular and cerebrovascular diseases. The in-depth study of Panax notoginseng saponin Ft1 is a key link in revealing the scientific connotation of "promoting blood circulation and removing blood stasis" in Panax notoginseng at the molecular level. It closely links traditional efficacy with modern disease targets.
4. Pharmacological activity and mechanism of action
The pharmacological activity of Panax notoginseng saponin Ft1 is extensive and complex, and its mechanism of action presents a network feature of multi-target and multi pathway interweaving. The following analysis focuses on the known targets (BCL2, HIF1A, MAPK1, CASP3, SOD2) and related diseases (myocardial infarction).
4.1 Dual regulation of cardiovascular system protection and "promoting blood circulation and removing blood stasis"
Sanqi saponin Ft1 perfectly embodies the wisdom of "stopping bleeding without leaving blood stasis" in traditional Chinese medicine's "promoting blood circulation and removing blood stasis", manifested in its effects on coagulation and angiogenesis Bidirectional and precise regulation。
In myocardial infarction In the context of stroke, this bidirectional regulation is particularly important: in the acute phase of infarction, its potential procoagulant properties need to be carefully evaluated; During the recovery period, its strong pro angiogenic and anti-inflammatory effects (see below) are beneficial for the survival of myocardial cells in the infarct margin, inhibit ventricular remodeling, and promote the establishment of collateral circulation, thereby improving heart function.
4.2 Antitumor activity
Sanqi saponin Ft1 exhibits inhibitory activity against various cancer cells, mainly by inducing cell apoptosis and lysosomal cell death.
- Target and pathway:
- Apoptotic pathway It inhibits by PI3K/AKT/mTOR This key pathway promotes cell survival and proliferation, while activating p38 MAPK and ERK1/2(MAPK1)Signal disrupts the balance of cellular survival. This leads to the activation of pro apoptotic factors while inhibiting anti apoptotic proteins such as BCL2 The expression. Finally,Caspase-3 (CASP3) As a key effector, caspase is activated to execute the cell apoptosis program.
- Lysosomal pathway In addition to classical apoptosis, it can also induce mitochondrial dysfunction and lysosomal membrane permeability, leading to another type of programmed cell death.
4.3 Anti inflammatory, antioxidant and organ protection
- antioxidant: Target Superoxide dismutase 2 (SOD2)It is a key antioxidant enzyme within mitochondria. Sanqi saponin Ft1 may enhance the ability of cells to clear mitochondrial reactive oxygen species (ROS) by upregulating the expression or activity of SOD2, thereby combating oxidative stress.
- Kidney protection The latest research has found that Panax notoginseng saponin Ft1 is TGR5 receptor The stimulant. After activation of TGR5, it can effectively inhibit the proliferation of renal tubular epithelial cells through a series of signaling pathways Ferroptosis (Iron Death)——A new cell death mode driven by iron dependent lipid peroxidation plays an important role in acute renal injury and diabetes nephropathy. This provides a new perspective for its development as a kidney protective drug.
- metabolic regulation In addition to acting as a TGR5 agonist, it can also antagonize the farnesol X receptor (FXR). TGR5 and FXR are a pair of important receptors that regulate bile acid metabolism, energy homeostasis, and glucose metabolism. This dual regulatory effect (exciting TGR5 and antagonizing FXR) enables it to resist Obesity and insulin resistance It has unique potential and may be achieved by promoting energy consumption and improving glucose and lipid metabolism.
4.4 Promoting wound healing
Comprehensively promote it Fibroblast proliferation、Enhance angiogenesis(Angiogenesis) and anti-inflammatory Notoginseng saponin Ft1 shows comprehensive advantages in promoting the healing of chronic wounds (such as diabetes foot ulcer), and its role is the result of multi link and multi target synergy.
5. Evaluation of drug properties
Based on the provided pharmacological parameters, we combine Lipinski's Rule of Five (Ro5) Objective evaluation of the pharmacological potential of Panax notoginseng saponin Ft1 in accordance with modern drug development standards.
Analysis of Lipinski's Five Rules:
1. Molecular weight (MW) ≤ 500 The MW of Ft1 is 917.14, seriously exceeding the standard (violation).
2. Lipid water partition coefficient (LogP) ≤ 5 LogP is 2.49, which is consistent.
3. Number of hydrogen bond donors (HBD) ≤ 5 According to the structural formula, its HBD number (mainly hydroxyl groups) far exceeds 5 (violation).
4. Number of hydrogen bond acceptors (HBA) ≤ 10 Its HBA count (oxygen atom count) far exceeds 10 (violation).
Conclusion Sanqi saponin Ft1 seriously violates three items in Ro5 (MW, HBD, HBA) and belongs to the typical category“Beyond Rule of Five (bRo5)”Compounds. Ro5 is mainly used to predict drug properties, especially oral absorption. Violating Ro5 means that its oral bioavailability is likely to be extremely low, consistent with its predicted very low Caco-2 permeability (0.1773).
Analysis of other key parameters:
- Blood-brain barrier (BBB) penetrability Predicted as' low '. This is consistent with its high TPSA and high molecular weight, which means it is not easily able to enter the central nervous system. For diseases targeting the central nervous system, such as certain brain tumors and neurodegenerative diseases, special drug delivery systems may be required.
- Protein binding rate (PPB)69.16%, belonging to the above average level. A higher protein binding rate will affect its free drug concentration, tissue distribution, and clearance rate.
- Toxicity warning:
- HERG inhibition No, this is a positive signal indicating a low risk of potential cardiac toxicity (causing QT interval prolongation).
- AMES test: 0.0, indicating no mutagenicity.
- Chromosomal aberration, skin/respiratory sensitization, phototoxicity, etc All are negative or absent, indicating good preliminary safety.
- Serum enzyme indicators (ALT/AST, etc.)The relevant prediction is' no ', indicating a low potential risk of liver cell toxicity.
Comprehensive Assessment:
Sanqi saponin Ft1 is a Highly active and multi-target, but drug development (especially oral absorption) faces significant challenges Natural products. Its advantages lie in its extensive pharmacological activity and good preliminary safety warning. The main development bottleneck lies in:
1. Poor oral bioavailability This is the biggest obstacle.
2. May require injection administration Considering its traditional source, Sanqi, has a history of injection applications, developing it into injectable formulations (such as freeze-dried powder injections) is a feasible path that can bypass absorption issues and be directly used for cardiovascular and cerebrovascular diseases, anti-tumor adjuvant therapy, etc.
3. Structural modification and formulation technology Future research can optimize its physicochemical properties through structural modifications, such as preparing prodrugs and simplifying sugar chains; Alternatively, advanced formulation technologies such as nanocrystals, liposomes, phospholipid complexes, and polymer micelles can be utilized to encapsulate drugs, significantly improving their solubility, stability, and targeting, and even enhancing their oral absorption.
6. Research Status and Application Prospects
Research status:
At present, research on Panax notoginseng saponin Ft1 has progressed from early extraction, isolation, and structural identification to Cellular and Molecular Pharmacological Mechanisms The exploration phase. Its mechanism of action in anti-tumor, pro angiogenesis, pro coagulation, organ protection, and other aspects has been extensively validated through in vitro and some animal experiments. The research network has covered multiple popular signaling nodes and death modes such as PI3K/AKT, MAPK, HIF-1 α/VEGF, cell apoptosis/ferroptosis, etc. However, there are still some shortcomings in existing research: 1) Most studies remain at the cellular level,In vivo pharmacological evaluation of the system The validation, especially in animal models of diseases, is not yet sufficient; 2)Pharmacokinetic study Severe scarcity, with unclear absorption, distribution, metabolism, and excretion (ADME) processes; 3) As a bRo5 compound, it Delivery strategy The research has just begun.
Application Prospects:
1. Drugs for the treatment of cardiovascular and cerebrovascular diseases Based on its pro angiogenic and anti-inflammatory properties, developed for treatment Myocardial infarction recovery period, chronic heart failure, ischemic stroke sequelae, diabetes microvascular complications (such as foot ulcer) The injection or new oral preparations have broad prospects.
2. Antitumor adjuvant therapy drugs As a natural product that induces cancer cell death through multiple targets and pathways, it can be combined with existing chemotherapy and targeted therapy to enhance efficacy or reduce drug resistance. Especially noteworthy is its role in tumors such as neuroblastoma.
3. Metabolic disease treatment drugs Its dual role as a TGR5 agonist/FXR antagonist provides insights for the development of therapies Type 2 diabetes, non-alcoholic fatty liver disease (NAFLD), obesity Innovative drugs provide new ideas.
4. Organ protectants The anti ferroptotic effect, especially in acute kidney injury and chronic kidney disease, is a highly promising new direction.
5. Structural optimization of lead compounds By using its complex structure as a template and simplifying or modifying it through medicinal chemical methods, it is expected to obtain derivatives with better activity and drug properties.
Summary:
Sanqi saponin Ft1 is a shining pearl presented by traditional Chinese medicine Sanqi to modern pharmacy. It vividly interprets the scientific connotation of multi-component synergistic treatment of diseases in traditional Chinese medicine with its complex chemical structure and multi-target, multi pathway network pharmacological effects. Although the inherent physical and chemical properties of modern drugs pose significant challenges in terms of drug development, this is precisely the field where modern pharmacy, medicinal chemistry, and pharmacology can shine. With breakthroughs in delivery technology and in-depth preclinical research, Panax notoginseng saponin Ft1 is expected to transform from a naturally occurring compound with clear activity into an innovative drug for treating cardiovascular and cerebrovascular diseases, metabolic diseases, and even tumors, truly achieving a leap from ancient pharmacopoeias to modern pharmacies.