The Immuno-Enhancing Effect of Rh2-L on Double Emulsion Adjuvant Against FMD

The Immuno-Enhancing Effect of Rh2-L on Double Emulsion Adjuvant Against Foot-and-Mouth Disease

1. Introduction

At present, vaccine is the preferred option for the prevention of foot-and-mouth disease (FMD), for which the adjuvant is essential due to its strong role in boosting immune response associated with vaccine antigens.

Herein, Rh2 liposomes (Rh2-L) are prepared by ethano injection methods, then loaded into a double emulsion adjuvant and emulsified into a Water-in-Oil-in-Water (W/O/W) emulsion, together with FMDV antigen, for the prevention of FMD.

2. About FMD

FMD, also known as aphthous fever, is a viral and fulminating infectious disease in which the foot-and-mouth disease virus (FMDV) violates hoofed livestock such as cattle, pigs and sheep. Since FMD is a zoonotic disease with high incidence and fast transmission speed, FMD vaccination is significant for those with long-term contact with livestock or low immunity such as the herders, veterinarians and children.

3.The significance of transform Rh2 into Rh2-L

By transformation of Rh2 into Rh2-L, on the one hand, the poor solubility and hemolysis of Rh2 can be mitigated to a large extent. On the other hand, Rh2-L functions as a liposome. Noteworthily, liposome itself has been revealed to be an adjuvant in vaccine design to improve immune response by interacting with antigen-presenting cells (APCs), increasing the representation of immune stimulants to APCs, and stimulating innate immunity.

4. The immune-enhancing effect of Rh2-L on FMD vaccine

Rh2-L has a immune-enhancing effect, as evidenced by an increase in humoral and cellular immune responses. In the FMDV model, the group of the FMD vaccine prepared with double emulsion adjuvants containing Rh2-L presents a more desirable protective effect relative to other groups. This group has a higher neutralizing antibody titer, stronger lymphocyte proliferation responses, and higher levels of cellular and humoral immune cytokine production, including IFN-γ and IL-4.

5. Conclusion

Rh2-L can further boost the immune effect of the double emulsion adjuvant against foot-and-mouth disease, which may be a promising and powerful platform for subunit vaccine adjuvant.

6. Reference

Saiya Miao, Qiufang Jing, Xuanyu Wang, et al. “Immuno-Enhancing Effect of Ginsenoside Rh2 Liposomes on Foot-and-Mouth Disease Vaccine”. Molecular Pharmaceutics. 2024 21 (1), 183-193. DOI: 10.1021/acs.molpharmaceut.3c00733

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BONTAC is ·the first enterprise in China to provide mass production of ginsenosides (Rh2) by enzymatic synthesis. BONTAC has unique Bonzyme enzymatic synthesis technology. Our coenzyme products are widely used in health industry, medical & beauty, green agriculture, biomedicine and other fields. BONTAC has more than 160 invention patents, with strict third-party self-inspection. Both the high-quality product and excellent service can be better ensured here. BONTAC has 12 years of industry experience, which is worthy of your trust. 


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