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‘Magic bullet’ found by researchers in fight against acute myeloid leukaemia

By Irish Pharmacist - 03rd Feb 2022

Researchers have made a huge leap forward in finding a targeted therapy for acute myeloid leukaemia (AML). The innovative ‘magic bullet’ technique uses specific antibodytargeting technology that would reduce the need for current treatments, which can be arduous, invasive and require long hospital stays. AML generally affects older people, with around 3,000 people diagnosed per year in the UK alone. Current treatments can involve the use of bone marrow transplantation, which can be painful, debilitating and can sometimes bring with it unpleasant side-effects. The researchers found that in AML, there is a high concentration of a molecule named Siglec-15 found on the surface of the diseased cell.

The team identified a molecule that could bind to Siglec-15, ‘piggyback’ into the cell and take with it a toxin that could potentially kill-off the diseased cell, thereby eradicating the disease without damaging healthy cells. Published in the British Journal of Haematology, the study was led by Dr Huan Cao, Research Fellow at the University of Aberdeen, alongside colleagues at Cambridge University, where much of the work was carried out. Dr Cao explains: “We are looking to find a cure for leukaemia by using targeted antibody therapy known as ‘magic bullets.’ For this, we needed to identify a cancer-specific target and make an antibody against it. “We found that in acute myeloid leukaemia, Siglec-15 is highly expressed compared to healthy cells and set out to find a way to use this over-expression to our advantage.

By identifying a molecule that binds to Siglec-15, we unlock the potential to attach a toxin to it, which can then be carried into the cell and ultimately destroy it. “In this way, it is possible that anti-Siglec-15 might be used as a ‘magic bullet’ to treat AML cells by introducing toxins into the diseased cells.” Although magic bullets have been used in some types of cancer, this is the first time they have been explored in AML. Dr Cao added: “AML is a big killer, especially for the elderly population. The ‘magic bullet’ treatment can be very effective, with minimal side-effects, which means it could be hugely beneficial to an already vulnerable population. “Although still in the experimental phase, if all goes well, there is potential that this may be used clinically as a treatment for patients within the next three-to-five years.”

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