Optimization of the production process for the anticancer lead compound illudin M: downstream processing

Area of Science:

• Biotechnology
• Natural Products Chemistry
• Drug Discovery

Background:

• Secondary metabolites are crucial starting points for drug development.
• Pharmaceutical companies have reduced focus on natural products due to discovery and supply challenges.
• Biotechnological production of small molecules like illudin M faces hurdles in strain culturing, purification, and characterization.

Purpose of the Study:

• To develop a viable biotechnological supply strategy for illudin M, a fungal sesquiterpene with anticancer potential.
• To demonstrate biotechnology as a key alternative to synthetic processes for small molecule production.
• To bridge the gap between natural product discovery and pharmaceutical development requirements.

Main Methods:

• Developed a µL-scale adsorption and extraction strategy for illudin M recovery from Omphalotus nidiformis culture supernatant.
• Transferred the strategy to lab-scale, utilizing a fixed resin-bed for adsorption and elution with 80% methanol.
• Employed a water/heptane mixture for further enrichment and crystallization of illudin M.

Main Results:

• Achieved a ~90% reduction in working volume and eliminated the aqueous phase during purification.
• Obtained a highly concentrated illudin M fraction after isocratic elution.
• Isolated illudin M with >95% purity through crystallization from heptane.

Conclusions:

• Developed a robust, scalable, and low-cost downstream process for high-purity illudin M.
• Reduced solvent waste and enabled solvent recycling through solid-phase extraction and heptane recovery.
• Presented an economically and ecologically advantageous alternative to existing purification methods.