Current Advances towards 4-Hydroxybutyrate Containing Polyhydroxyalkanoates Production for Biomedical Applications

Area of Science:

• Biomaterials Science
• Microbial Biotechnology
• Polymer Chemistry

Background:

• Polyhydroxyalkanoates (PHA) are biodegradable polyesters with significant biomedical potential.
• Poly-4-hydroxybutyrate (P4HB) is the only FDA-approved PHA for medical use, highlighting its therapeutic value.
• Most microorganisms cannot naturally produce P4HB or polymers containing 4-hydroxybutyrate (4HB) monomers due to a lack of the necessary metabolic pathways.

Purpose of the Study:

• To review the biomedical applications of P4HB.
• To identify natural microbial producers of P4HB.
• To summarize strategies for producing P4HB in non-native microorganisms, focusing on cost reduction.

Main Methods:

• Literature review of P4HB biomedical applications.
• Analysis of natural P4HB-producing microorganisms.
• Compilation and categorization of metabolic engineering and bioprocess strategies for P4HB synthesis in non-producing hosts.

Main Results:

• P4HB has diverse and promising biomedical applications.
• Natural P4HB production is limited to specific microbial strains.
• Strategies for cost-effective P4HB production include using low-cost substrates and engineering 4HB monomer-supplying pathways in microorganisms.

Conclusions:

• Developing efficient and cost-effective methods for P4HB production is crucial for its wider biomedical adoption.
• Metabolic engineering offers a viable route to produce P4HB in well-characterized microbial hosts.
• Further research into optimizing P4HB production pathways and substrates will enhance its accessibility for medical applications.