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Immunomodulatory Activities of Emerging Rare Ginsenosides F1, Rg5, Rk1, Rh1, and Rg2: From Molecular Mechanisms to
Chang-Eui Hong1,2,3, Su-Yun Lyu1,2,3
1Department of Pharmacy, College of Pharmacy; Sunchon National University, Suncheon 57922, Republic of Korea.
Pharmaceuticals (Basel, Switzerland)
|October 29, 2025
Summary
Rare ginsenosides from Panax ginseng show distinct immune effects. Advanced formulations improve bioavailability, enabling clinical use for immune disorders like cancer and inflammation.
Area of Science:
- Pharmacology and immunology
- Natural product chemistry
- Drug delivery systems
Background:
- Ginsenosides from Panax ginseng are key bioactive compounds with immunomodulatory potential.
- Rare ginsenosides, modified through deglycosylation, heating, or steaming, exhibit enhanced activity and bioavailability.
- Existing research has primarily focused on major ginsenosides, leaving rare variants underexplored.
Purpose of the Study:
- To review the immunomodulatory mechanisms, structure-activity relationships (SARs), and therapeutic potential of five rare ginsenosides: F1, Rg5, Rk1, Rh1, and Rg2.
- To analyze their production methods, immunological effects, molecular pathways, pharmacokinetics, safety, and clinical translation strategies.
- To highlight their distinct applications in immunotherapy and inflammatory diseases.
Main Methods:
- Comprehensive literature review of production, immunological effects, molecular mechanisms, pharmacokinetics, safety, and clinical applications.
- Analysis of chemical structures, immune cell modulation, signaling pathways (MAPK, NF-κB, STAT, TLR4), and disease model efficacy.
- Evaluation of bioavailability enhancement strategies using advanced delivery systems (nanostructured lipid carriers, self-microemulsifying systems, liposomes).
Main Results:
- Ginsenoside F1 acts as an immunostimulant, enhancing NK cell and macrophage activity via MAPK/NF-κB pathways.
- Rg5, Rk1, Rh1, and Rg2 exhibit anti-inflammatory effects through distinct mechanisms, including TLR4/NF-κB inhibition and modulation of MAPK and STAT pathways.
- Advanced delivery systems improved bioavailability up to 2.6-fold, facilitating clinical development.
- Structure-activity analysis indicated sugar moiety position dictates immunological outcomes.
Conclusions:
- F1 is a promising immunostimulant for cancer immunotherapy.
- Rg5, Rk1, Rh1, and Rg2 offer precision medicine opportunities for inflammatory diseases due to their complementary anti-inflammatory actions.
- Optimized production and formulation technologies pave the way for significant clinical translation of these rare ginsenosides for immune-related disorders.
