RNA Immunization

RNA immunity is an emerging strategy widely recognized during COVID-19.Inside the body, RNA translates into heterologous proteins, activating T cells and antibody responses.RNA is delivered by lipid nanoparticles (LNP) with inherent immunogenicity, requiring no extra adjuvants.Linear, circular and self-amplifying RNA are widely applied. NBLST offers one-stop solutions for RNA-LNP preparation, RNA immunity and nanobody development, ensuring quality and high efficiency.

Technical Principle:


Service Highlights:









Rapid Antigen Preparation

mRNA preparation completed in 1-2 weeks

Flexible Immunization Strategies

Custom target sequence design

Longer Expression Duration

Efficient Circular/Self-Amplifying mRNA preparation

More Precise Targeted Delivery

LNP antibody labeling service

Particle Size Homogeneity Detection of RNA-LNP:

DLS and Cryo-EM data show that the mRNA-LNP prepared by NBLST exhibits excellent particle size uniformity.

Expression Persistence Detection of Different RNA Variants:

Results from in vitro fluorescence assays show that both circRNA and saRNA outperform traditional linear mRNA in terms of gene expression levels and gene expression persistence.

RNA antigens are adopted for immunization based on target analysis. The immunization procedure and timeline are shown below:

No.

Time

Immunization Procedure

1

Day 0

Collect 10 mL of whole blood as reserved negative serum.

2

Day 1

1st: 0.5 mg RNA immunogen; Intramuscular injection at 10 sites.

3

Day 14

2nd: 0.25 mg RNA immunogen; Intramuscular injection at 5 sites.

4

Day 21

Collect 1 mL of whole blood, separate serum, and perform protein ELISA titer testing.

5

Day 28

3rd: 0.25 mg RNA immunogen; Intramuscular injection at 5 sites.

6

Day 35

Collect 1 mL of whole blood, separate serum, and perform protein ELISA titer testing.

7

Day 42

4th: 0.25 mg RNA immunogen; Intramuscular injection at 5 sites.

8

Day 49

Collect 10 mL of whole blood, separate serum, and perform protein ELISA titer testing. Based on  titer results:

  • Collect 50 mL of whole blood, separate serum, perform protein ELISA titer testing. 
  • From the remaining whole blood, isolate PBMCs, lyse 2.0E+07 cells with 1 mL TRIzol, and aliquot at 1 mL per tube.

Result Analysis:


Deliverables: