Scientists have genetically engineered tiny algae to kill up to 90 percent of cancer cells in the lab, while leaving healthy ones unharmed, and the treatment has also been shown to effectively treat tumours in mice without doing damage to the rest of the body.
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| A microscope image of cancer cells in the cervix American Cancer Society/Getty Images |
Developing medicine that only attacks tumour cells and leaves the rest of the body alone is one of the biggest challenges in cancer drug therapy. Such targeted chemotherapy helps to avoid some of the devastating side-effects associated with typical chemo treatment, when all fast-dividing cells in the body are bombarded with toxic drugs – including hair follicles, nails, and bone marrow.
Now an international team of scientists from Australia and Germany have genetically engineered a diatom algae that can get the synthetic nanoparticle job done just as nicely.
"Much attention has been paid to developing drug carriers that are natural, biocompatible and biodegradable."The tiny biosilica diatom algae meet these criteria, as they mostly just need water and light to grow, and can break down if left to the elements.
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| This image shows the green algae cells delivering the yellow chemotherapy drugs to the purple lymphocyte cells, which will attack the cancer cells (University of South Australia) |
By choosing the right antibody, the algae nanoparticles can be easily pointed in the direction of tumour cells only.The team stuffed the diatoms full of chemo drugs using a special two-step method, and then tested the nanoparticles on cancer cells both in vitro and in mice with induced neuroblastoma tumours.
Developing medicine that only attacks tumour cells and leaves the rest of the body alone is one of the biggest challenges in cancer drug therapy. Such targeted chemotherapy helps to avoid some of the devastating side-effects associated with typical chemo treatment, when all fast-dividing cells in the body are bombarded with toxic drugs – including hair follicles, nails, and bone marrow.Not only did the algae successfully kill roughly 90 percent of cancer cells in a dish while sparing healthy human cells, they also reduced tumour growth in mice after a single injected dose.This novel drug delivery system based on a biotechnologically tailored, renewable material holds a lot of potential for the therapy of solid tumours, including currently untreatable brain tumour.
http://www.sciencealert.com/
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