Producing Virus-like Particles with Yeast for Hepatitis B Vaccine
Author Information
Author(s): Lünsdorf Heinrich, Gurramkonda Chandrasekhar, Adnan Ahmad, Khanna Navin, Rinas Ursula
Primary Institution: Helmholtz Centre for Infection Research
Hypothesis
Does the Hepatitis B surface antigen assemble into virus-like particles inside yeast cells or during purification?
Conclusion
The study concludes that the Hepatitis B surface antigen assembles into lamellar structures in the endoplasmic reticulum of yeast, but virus-like particles are formed only during purification.
Supporting Evidence
- The Hepatitis B surface antigen was produced in high levels using a specific yeast expression system.
- Electron microscopy revealed the antigen's assembly into lamellar structures in the endoplasmic reticulum.
- No virus-like particles were detected within the yeast cells, indicating assembly occurs during purification.
Takeaway
This research shows that a protein needed for a Hepatitis B vaccine builds up in yeast cells but doesn't form the final vaccine particles until after the cells are broken open and processed.
Methodology
The study used electron microscopy and immunogold labeling to analyze the production and assembly of the Hepatitis B surface antigen in yeast cells.
Limitations
The study did not find virus-like particles within the yeast cells, which limits understanding of the assembly process.
Digital Object Identifier (DOI)
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