GoKawiil
Tech News
Scientists have developed a drug delivery approach that targets specific structures within individual cells rather than simply reaching a cell as a whole. This subcellular precision aims to route therapeutic payloads to particular organelles or compartments where they can act most effectively.
Scientists are engineering particle-based delivery systems intended to ferry large molecules such as proteins and messenger RNA past the blood-brain barrier, a membrane that normally blocks such compounds from reaching brain tissue. Small chemicals like paracetamol already pass through naturally, but bigger therapeutic molecules cannot, limiting treatment options for brain disorders.
Researchers at the University of Minnesota, led by surgeon Daniel Saltzman, have developed a therapy using genetically modified Salmonella Typhimurium bacteria to carry interleukin-2, an immune-stimulating molecule, straight into tumours. Pancreatic cancer patient John Heller received the experimental treatment after starting chemotherapy for advanced disease, illustrating an early real-world test of the approach.
A Nature feature surveys six novel approaches under development for delivering drugs more precisely and effectively, ranging from advanced nanoparticle carriers to devices designed to target specific tissues. These innovations aim to overcome longstanding challenges such as poor bioavailability, degradation before reaching target sites, and off-target side effects.