Researched
Ciclosporin and Anti-Rejection Drugs
Ciclosporin, from a soil fungus, was found in 1972 to suppress rejection; after Calne's 1978 kidney trials and US approval in 1983, transplants beyond the kidney became practical.
Open in the interactive tree →Sandoz scientists in Basel isolated the fungus Tolypocladium inflatum from a Norwegian soil sample in 1970, and a screening test in January 1972 revealed that its product, ciclosporin, suppresses immune cells. In 1978 Roy Calne's team at Cambridge showed it prevented rejection of cadaver-donor kidneys, and on 9 March 1980 Thomas Starzl gave it to the first of his liver-transplant patients in Pittsburgh. The US FDA approved it in 1983. Before it, rejection and the shortage of donor organs were the main limits on transplantation.
Prerequisites
- Antibiotics1928Like antibiotics, it came from screening soil fungi.
- Organ Transplantation1954Rejection was the barrier the first kidney transplants left open.
Unlocks
- Pig-Organ Transplants2022Pig-organ recipients still depend on anti-rejection drug regimens.
- Stem-Cell Islets for Type 1 Diabetes2025Transplanted cells are still attacked without anti-rejection drugs.