Scientists have made inroads in this area with biocompatible packaging that protects it from digestive enzymes, by developing small drug molecules that don’t break down, and oral capsules that inject insulin through microneedles.Scientists at the Walter and Eliza Hall Institute have broken yet more ground in this field, by using cryo-electron microscopy (EM) to visualize complex molecules in fine detail.“Insulin's interaction turns out to be far more complex than anyone predicted, with both insulin and its receptor changing shape dramatically as they partner up.”The team began with reconstructions of several peptides known to interact with the insulin receptor and hold it open and active.But they do say the findings solve a long-standing mystery around whether unrelated molecules can mimic the role of insulin, and therefore “illuminate unexplored pathways for controlling the signaling of the insulin receptor as well as opportunities for development of insulin mimetics.”“Scientists have had success replacing these kinds of mimetic molecules with drugs that can be taken as pills,” Dr Kirk said.“It’s still a long road that will require further research, but it’s exciting to know that our discovery opens the door for oral treatments for type 1 diabetes.”The research was published in the journal Nature Communications."