University of Edinburgh Scientists Engineer Bacteria to Convert Plastic Waste into Parkinson’s Medication

Edinburgh researchers engineer E. coli to turn PET plastic into L-DOPA, creating a sustainable new path for Parkinson's disease treatment.

By: AXL Media

Published: Mar 16, 2026, 6:55 AM EDT

Source: Information for this report was sourced from the University of Edinburgh.

A Breakthrough in Biological Engineering

Scientists at the University of Edinburgh have achieved a significant milestone in sustainable medicine by converting discarded plastic bottles into a critical drug for treating Parkinson’s disease. This pioneering study, published in Nature Sustainability, marks the first time a biological process has been engineered to repurpose plastic waste into a complex therapeutic for a neurological disorder. By utilizing the metabolic power of bacteria, the research team has demonstrated that environmental pollutants can be reimagined as valuable chemical feedstocks for the healthcare industry.

The Transformation Process: From PET to L-DOPA

The technique focuses on polyethylene terephthalate (PET), a lightweight plastic common in food and beverage packaging. The process involves two primary stages:

Chemical Breakdown: PET waste is first decomposed into its core chemical building block, terephthalic acid.

Biological Conversion: Engineered E. coli bacteria then consume the terephthalic acid. Through a series of programmed biological reactions, the bacteria convert these molecules into L-DOPA (levodopa), the gold-standard medication used to manage the symptoms of Parkinson’s.