Synonym name: Glycoside L-G3; Tauroside G3; Nigelloside C
Catalogue No.: BP0510
Cas No.: 33289-85-9; 942997-00-4
Formula: C₅₃H₈₆O₂₂
Mol Weight: 1075.25
Botanical Source: Hedera taurica, Hedera canariensis and Dipsacus aureus

Purity: 95%~99%
Analysis Method: HPLC-DAD or/and HPLC-ELSD
Identification Method: Mass, NMR
Packing: Brown vial or HDPE plastic bottle
Can be supplied from milligrams to grams.

For Reference Standard and R&D, Not for Human Use Directly.
Inquire for bulk scale.

HPLC of Dipsacoside B

Storage conditions：Short-term storage at 2~8℃, long-term storage at -20 ~ -80℃

Introduction/Overview

Dipsacoside B is the main active ingredient derived from the traditional Chinese medicinal material Dipsacus asper Wall, and is a natural product of the saponin class. As a traditional Chinese medicine, Chuanxudan has long been widely used in the treatment of orthopedic diseases, with effects such as promoting blood circulation and removing blood stasis, nourishing the liver and kidneys, and strengthening muscles and bones. With the development of modern pharmacology and molecular biology technologies, the biological activity and mechanism of Chuanxuduan saponin B have gradually been revealed, especially showing significant potential in the field of antitumor treatment. This paper aims to systematically review the chemical structure, physicochemical properties, plant origin, and extraction methods of Chuanxudan saponin 乙, focusing on analyzing its pharmacological activity and mechanism of action, evaluating its druggability parameters, exploring its clinical application prospects, and providing theoretical basis and research directions for subsequent drug development and clinical research.

Chemical structure and physicochemical properties

Chuanxudan saponin B (CAS No.: 33289-85-9) is a relatively large molecular weight natural saponin, with a molecular weight of 1075.2490. It has a complex chemical structure and contains a triterpene or diterpene skeleton linked by multiple glycosyl groups. Its LogP value is 1.9292, indicating moderate hydrophobicity and the ability to penetrate cell membranes to some extent in lipid environments, but its water solubility is relatively low (0.2115), limiting its solubility in the aqueous phase. Its polar surface area (TPSA) reaches as high as 353.9, reflecting the presence of many polar groups on the molecular surface, such as hydroxyl and glycosyl groups, which is significant for its binding to biomacromolecules. Chuanxuan saponin B has low blood-brain barrier permeability, suggesting limited distribution in the central nervous system. In terms of safety, it does not suppress the hERG channel, and the Ames-induced mutagenic test result was zero, demonstrating good safety and low mutagenic risk.

Plant Origins and Extraction Methods

Saponin B is mainly found in the roots of Dipsacus asper Wall. This plant is a perennial herbaceous plant of the Araliaceae family, Dipsacus asper Wall., widely distributed in central and southwestern China. Traditionally, Chuanxudan has been used for bone healing, rheumatic arthritis, and kidney deficiency with lower back pain. As one of its main active ingredients, Chuanxudan saponin B is usually extracted and separated through the following steps:

1. Raw material processing: collect dried Sichuan Xu roots and crush them into fine powder for later use.
2. Extraction: Water extraction or alcohol extraction (such as 70% ethanol) methods are used, along with reflux extraction or ultrasound-assisted extraction techniques to improve extraction efficiency.
3. Crude extract concentration: After filtration, the extract is concentrated under reduced pressure to a certain viscosity.
4. Separation and purification: Using multi-stage chromatography techniques such as silica gel column chromatography and reversed-phase high-performance liquid chromatography (RP-HPLC), further separation and purification of the Sichuan Broken Saponin E.
5. Structural identification: Modern analytical methods such as mass spectrometry (MS) and nuclear magnetic resonance (NMR) are used to confirm the structure of the compound.

In recent years, the application of supercritical fluid extraction and membrane separation technologies has also provided new ideas for efficient extraction of Sichuan Xuduan saponin 乙.

Pharmacological activity research

Chuanxudan saponin B shows significant antitumor effects across various pharmacological activities. Both in vitro cell experiments and in vivo animal models have confirmed its inhibitory effects on various tumor cells, including breast, lung, and liver cancer. Its antitumor activity is mainly reflected in:

• Inhibiting tumor cell proliferation: By regulating cell cycle-related proteins, it blocks the proliferation of tumor cells.
• Induction of tumor cell apoptosis: activates endogenous and exogenous apoptosis pathways to promote programmed cell death.
• Inhibits tumor cell migration and invasion: Downregulates matrix metalloproteinase (such as MMP2) expression, reducing tumor cell metastatic potential.
• Anti-angiogenesis: Inhibits the expression of angiogenesis factors (such as HIF1A) in the tumor microenvironment, blocking the tumor's nutrient supply.

In addition, Chuanxuduan saponin B also exhibits certain anti-inflammatory, antioxidant, and immunomodulatory effects, providing multi-target support for its comprehensive treatment of tumors and related diseases.

Mechanism of action and molecular targets

The antitumor mechanism of Chuanxuduan saponin B involves multiple signaling pathways and key molecular targets, mainly including:

• MCL1 and BCL2: As anti-apoptotic proteins, MCL1 and BCL2 play key roles in tumor cell survival. Chuanxuduan saponin B can downregulate its expression and promote the activation of apoptosis signaling.
• STAT3: Signal transduction and transcription activator factor 3 (STAT3) plays an important role in tumor cell proliferation and immune evasion. Acetosenoside inhibition inhibits STAT3 phosphorylation, blocking its transcriptional activity.
• MMP2: Matrix metalloproteinase 2 is involved in the degradation and metastasis of the tumor cell matrix. Chuanxuduan saponin B inhibits MMP2 expression, reducing tumor invasion capacity.
• TOP1 and TOP2A: Topoisomerase I and II are key enzymes for DNA replication and transcription. Interrupted saponin B blocks normal DNA replication in tumor cells by interfering with its activity.
• HIF1A: Hypoxia-inducing factor 1α regulates adaptive responses in the tumor hypoxic microenvironment; Chuanxuan saponin inhibitory acid inhibitory HIF1A expression inhibits tumor angiogenesis.
• MAPK1: Mitogen-activated protein kinase 1 participates in cell proliferation and differentiation signal transduction; the saponin glycoside of Chuanxuan regulates its activity, affecting tumor cell fate.
• ESR1 and CYP19A1: estrogen receptor α and aromatase are especially important in hormone-dependent tumors (such as breast cancer). Broken saponin ethyl acts as an anti-hormone tumor by regulating its expression.

The synergistic effect of these multi-target and multi-pathway mechanisms gives Chuanxuduan saponin B significant potential and broad indications in anti-tumor therapy.

Druggability evaluation and pharmacokinetics

The druggability parameters of Chuanxudan Saponin B indicate that it possesses certain advantages and challenges in drug development:

• Molecular weight and polarity: A relatively large molecular weight (1075.2490) and high TPSA (353.9) limit its oral absorption and cell membrane permeability, potentially leading to lower bioavailability.
• A moderate hydrophobicity of 1.9292 in LogP facilitates cell membrane penetration, but insufficient water solubility (0.2115) affects formulation development.
• Low blood-brain barrier permeability: suggests it mainly acts on peripheral tissues, reducing the risk of central nervous system toxicity.
• Safety: No hERG channel inhibition, reducing the risk of cardiotoxicity; Ames test was negative, indicating no mutagenicity and relatively high safety.

Pharmacokinetics, current research is limited, but it is speculated that Chuanxuan saponin B may undergo liver metabolism and gut microbiota transformation in the body, and the activity and toxicity of these metabolites require further systematic study. Its low water solubility and high polarity suggest the need for formulation improvements (such as nanocarriers, liposomes, etc.) to improve bioavailability.

Prospects and outlooks for clinical applications

As a natural product with multi-target antitumor activity, Chuanxuduan saponin B shows broad application prospects in tumor treatment. Its multiple mechanisms of action not only inhibit tumor cell proliferation and metastasis, but also regulate the tumor microenvironment and enhance immune responses, showing potential as a new anti-tumor drug. In addition, Chuanxudan saponin B is relatively safe, providing a fundamental guarantee for clinical application.

Future research should focus on the following aspects:

1. Systematic review of pharmacokinetics and toxicology: clarify its absorption, distribution, metabolism, and excretion characteristics in the body, and assess the safety of long-term medication.
2. Formulation development and drug delivery route optimization: Enhance bioavailability and targeting through nanotechnology, liposome encapsulation, or other novel drug delivery systems.
3. Combination therapy strategies: Explore the synergistic effects of Hydroxuduan Saponin B with existing chemotherapy, targeted drugs, or immunotherapy to enhance treatment efficacy and reduce side effects.
4. Clinical trial design: Conduct early-stage clinical trials to verify efficacy and safety, and promote their translation into clinical applications.

Conclusion

Chuanxudan saponin 乙, as an important active ingredient in Chuanxudan, has become a hot topic in natural product pharmacology research due to its unique chemical structure and multi-target antitumor effects. Its remarkable pharmacological activity and good safety in the field of anti-tumor therapy provide valuable natural resources and theoretical basis for the development of novel anticancer drugs. Although its druggability faces certain challenges, with continuous advances in modern drug formulation technology and molecular biology research, Chuanxudan Saponin B is expected to become an important candidate for future anti-tumor treatment. Subsequent in-depth pharmacological mechanism research, pharmacokinetic evaluation, and clinical validation will further promote its clinical application and benefit a wide range of patients.