Professor Gregory Gregoriadis is the Founder (1997) of Xenetic Biosciences Inc and creator of the company's polysialic acid and liposome technologies. He was a Board member, and CSO (1997-2015), Head of the Centre for Drug Delivery Research(1990-2001) at University College London, and Head of the Liposomes Group at the Medical Research Council (1972-1990). In 1971 he introduced (with B. Ryman) liposomes for drug and vaccine delivery and, in 1991, he introduced polysialic acid to improve the pharmacokinetics and pharmacodynamics of protein and peptide drugs.