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Optimization of fermentation media for the production of higher yield capsular polysaccharide by Streptococcus

Shital S Jain1, Rajesh Kumar Kante2, Vikas K Singh2

  • 1Serum Institute of India Pvt. Ltd., Hadapsar, Pune, Maharashtra 411028, India; Savitribai Phule Pune University, Department of Biotechnology, Pune, Maharashtra 411007, India.

Carbohydrate Polymers
|May 21, 2025
PubMed

Insights

Optimizing Streptococcus pneumoniae fermentation media significantly boosted capsular polysaccharide (CPS) yield. This advance supports cost-effective vaccine production against pneumococcal diseases.

Area of Science:

  • Microbiology
  • Biotechnology
  • Vaccine Development

Background:

  • * Streptococcus pneumoniae causes severe infections like pneumonia, meningitis, and sepsis.
  • * Pathogenicity is linked to capsular polysaccharide (CPS) thickness, making it a vaccine target.
  • * Efficient CPS production requires optimized fermentation media and conditions.

Purpose of the Study:

  • * To optimize Streptococcus pneumoniae growth media and fermentation conditions for enhanced CPS yield.
  • * To apply a Quality by Design (QbD) approach for systematic process development.
  • * To improve cost-effectiveness of CPS production for vaccine development.

Main Methods:

  • * Employed an integrated approach: One Factor At-a-Time (OFAT), Plackett-Burman, and Response Surface Methodology (RSM) designs.
  • * Evaluated key media components (carbon, nitrogen sources) and macro/micro-nutrients.
  • * Assessed fermentation conditions using batch and fed-batch processes.

Main Results:

  • * Achieved highest reported CPS yields: 819 mg/L (batch) and 1860 mg/L (fed-batch).
  • * Identified critical media components and fermentation parameters for maximizing CPS production.
  • * Demonstrated successful optimization for S. pneumoniae serotype 22F.

Conclusions:

  • * A QbD-based strategy effectively optimizes media and fermentation for S. pneumoniae growth and CPS productivity.
  • * The optimized process significantly enhances CPS yield, crucial for vaccine manufacturing.
  • * This approach is applicable to other S. pneumoniae serotypes for multivalent vaccine production.
Keywords:
Design of experimentsFed-batch fermentationFermentation processMedia optimizationPolysaccharide vaccineStreptococcus pneumoniae serotype 22F

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