Iain MacintyreFRS was a British endocrinologist who made important contributions to the understanding of calcium regulation and bone metabolism. Shortly after the hormone calcitonin had been described by Harold Copp, Macintyre's team was the first to isolate and sequence the hormone and to demonstrate its origin in the parafollicular cells of the thyroid gland. He subsequently analysed its physiological actions. Along with H. R. Morris he isolated and sequenced calcitonin gene-related peptide. Later research centred on the role played by nitric oxide on bone metabolism.
After house posts in Glasgow he began as a trainee pathologist in Sheffield, which involved working as a demonstrator in the laboratory of Dr Hans Krebs, the future Nobel laureate. His contact with Krebs would influence his career choice in chemical pathology. He joined the chemical pathology department at the Royal Postgraduate Medical School, at the Hammersmith Hospital in London as a registrar. In 1954 he became the Sir Jack Drummond Memorial Fellow, which enabled him to embark on a career of research in biochemistry, initially under the mentorship of Professor Earl King. He designed and constructed a flame photometer that enabled very accurate measurements of blood calcium and magnesium levels. This led to studies of magnesium deficiency. Shortly after Douglas Harold Copp's discovery of the hormone calcitonin, Macintyre's group demonstrated that the hormone was produced in the parafollicular cells of the thyroid rather than the parathyroid gland as suggested by Copp. In 1967 the Gardner International Award was made jointly to Copp and Macintyre for their work on the origin and existence of calcitonin. Macintyre's laboratory also purified and then sequenced both porcine calcitonin and human calcitonin. His team also demonstrated calcitonin gene-related peptide, which they went on to sequence and then characterise. A major contribution to education during his time at the Hammersmith Hospital was the organisation of international endocrinology conferences held every two years between 1967 and 1981. These were attended by leading workers in the field of endocrinology from around the world. He was promoted to the chair of Endocrine Chemistry and Chemical Pathology in 1967 and in 1982 made director of the Wellcome Endocrine Unit based at the Hammersmith Hospital. The research interest expanded into the role of vitamin D in bone metabolism. On retiring from the Hammersmith Hospital he became research director at the William HarveyResearch Institute of the University of London. There his research centred on the role of nitric oxide in bone metabolism.
He married Mabel Wilson Jamieson, on 14 July 1947 in the Chapel of the University of Glasgow. She died in 2003. They had one daughter, Fiona Bell Macintyre. Macintyre died in London in 2008.
