By attaching malaria proteins to cancer
cells, tumours could be burrowed into and then destroyed — and it seems to be
effective on 90 per cent of types of cancers
Scientists
may have found a way to revert cancerous cells to healthy tissue AFP/Getty
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Scientists
might have accidentally made a huge step forward in the search for a cure for
cancer — discovering unexpectedly that a malaria protein could be an effective
weapon against the disease.
Danish
researchers were hunting for a way of protecting pregnant women from malaria,
which can cause huge problems because it attacks the placenta. But they found
at the same time that armed malaria proteins can attack cancer, too — an
approach which could be a step towards curing the disease.
Scientists
have combined the bit of protein that the malaria vaccine uses to bury into
cells and combined it with a toxin — that can then bury into cancer
cells and release the toxin, killing them off.
The
scientists have found that in both cases the malaria protein attaches itself to
the same carbohydrate. It is the similarities between those two things that the
cure could exploit.
The
carbohydrate ensures that the placenta grows quickly. But the team behind the
new findings have detailed how it serves the same function in tumours — and the
malaria parasite attaches itself to the cancerous cells in the same way,
meaning that it can kill them off.
Scientists
said that they had been searching for a long time for a way to exploit the
similarities between the placenta and the tumour.
"For
decades, scientists have been searching for similarities between the growth of
a placenta and a tumor,” said Ali Salanti from University of Copenhagen. “The
placenta is an organ, which within a few months grows from only few cells into
an organ weighing approx. two pounds, and it provides the embryo with oxygen
and nourishment in a relatively foreign environment. In a manner of speaking,
tumors do much the same, they grow aggressively in a relatively foreign
environment.”
The
process has already been tested in cells and on mice with cancer, with the
findings described in a new article for the journal Cancer Cell. Scientists
hope that they can begin testing the discovery on humans in the next four
years.
The
biggest questions are whether it'll work in the human body, and if the human
body can tolerate the doses needed without developing side effects,” said
Salanti. “But we're optimistic because the protein appears to only attach
itself to a carbohydrate that is only found in the placenta and in cancer
tumors in humans.”
In
the tests on mice, the animals were implanted with three different types of
human cancers. It reduced non-Hodgkin's lymphoma tumours to about a quarter of
their size, got rid of protstate cancer entirely in two of six mice and kept
alive five out of six mice that had metastatic bone cancer compared to a
control group all of which died.
"We have separated the
malaria protein, which attaches itself to the carbohydrate and then added a
toxin," said Mads Daugaard, a cancer researcher at Canada's University of
British Columbia and one of the scientists that worked on the
research. "By conducting tests on mice, we have been able to show
that the combination of protein and toxin kill the cancer cells."
Originally published in Independent UK
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