By Storm Newton, PA & Rom Preston-Ellis A drug breakthrough could usher in a “new era” for how an aggressive form of blood cancer is treated, scientists have said. Described by researchers as a “largely incurable disease”, acute myeloid leukaemia (AML) is a cancer which causes the bone marrow to produce a large number of abnormal blood cells. A study has discovered that blocking an enzyme in the body’s cells which senses changes in oxygen levels could stop the disease from progressing. In the presence of oxygen, these enzymes known as hypoxia-inducible factor prolyl hydroxylases (PHDs) become …