Synthetic biology for scalable production of medical polyhydroxyalkanoates: Advances and applications.

Polyhydroxyalkanoates (PHAs), characterized by their biodegradability and biocompatibility, present a promising, sustainable alternative to conventional synthetic polymers for biomedical applications. This study highlights the diversity of PHA monomers and structures, controllable biodegradability, and excellent biocompatibility, emphasizing their suitability for tissue engineering (bone, skin, cardiovascular, oral), anti-hair loss treatments, and drug delivery systems. Significant advancements in synthetic biology, encompassing CRISPR/Cas genome editing, promoter engineering, ribosome binding site optimization, metabolic pathway fine-tuning, and morphology engineering, have led to substantial improvements in PHA production efficiency and a reduction in associated costs. The adoption of next-generation industrial biotechnology (NGIB) using halophiles further enhances economic viability and simplifies the production process. The current commercial landscape and the future prospects of medical-grade PHAs, poised to become mainstream biodegradable materials, are also critically discussed.