Growing Platelets from Silk to Keep Blood Supplies Flowing

• Researchers are developing lab-grown blood platelets using silk fibroin to address chronic supply shortages.
• Current platelet products have a very short shelf life of five days and require room-temperature storage, making them vulnerable to donation fluctuations.
• The project, funded by the EU, uses an artificial bone marrow bioreactor to mimic the environment where platelets are naturally produced.

The Platelet Challenge

• Platelets are essential for cancer chemotherapy, surgery, and emergency medicine.
• Global supply relies on donors, but approximately 15% of transfusions require specific tissue matches, complicating logistics.
• Supplies are prone to disruptions during summer months or pandemics due to the limited five-day shelf life.

Recreating Bone Marrow

• Platelets are naturally produced by megakaryocytes in the bone marrow.
• Researchers from the SilkFUSION and SilkPlatelet initiatives utilized silk fibroin—a protein from silkworms—because it is biocompatible, flexible, and strong.
• This material allows for the creation of a 'niche' that mimics the human bone marrow environment, supporting reliable cell development.

Future Outlook and Applications

• Efficiency is being improved through genetically modified stem cells to optimize production costs.
• The SILKink project developed a 3D-printable silk 'bio-ink' to create accurate tissue models for drug testing and blood disease research.
• While clinical use is years away, researchers have successfully conducted small animal trials and are moving toward scaling the technology for human transfusion needs.