We hear from Chloe, who has diabetes, and Dr. Aileen King, who researches into diabetes. Research on dogs led to the discovery of insulin in the 1920's. Before this becoming diabetic led to death. Now Aileen's research with mice is looking for the best way to transplant insulin producing cells from donors to diabetic people.
The cells are encapsulated in a gel to protect them from the immune cells after the transplant.
Read how insulin was isolated here: http://www.animalresearch.info/en/listing/143/insulin-isolated/
Download this film here: http://www.understandinganimalresearch.org.uk/resources/video-library