Scientists from Nanyang Technological
University, Singapore (NTU Singapore) have developed a new kit that
will allow doctors to find out within minutes if diabetic patients
are suffering from inflammation.
Current procedures require patients to
wait for several hours for the results obtained from the conventional
full blood count test.
Also, instead of a vial of blood in the
present method, the new test kit only needs a drop of blood to test
if a patient is suffering from inflammation caused by abnormal immune
cell activation.
In conventional procedures, blood cells
need to be physically separated for analyzing, which is time
consuming and laborious, while the new test kit does this
automatically.
This made-in-Singapore test kit may
also see the cost of such tests becoming more affordable as it costs
less than a dollar to produce.
Diabetes is a serious health problem,
which affects about 10 per cent of the world's population. Singapore
has the second-highest proportion of diabetics among developed
nations at 10.53 per cent, as estimated by International Diabetes
Federation (IDF) in 2015.
Type 2 diabetes is the most common and
is usually treated with lifestyle changes, medication and insulin. If
diabetic patients can be grouped based on their inflammation status
in addition to glucose level, then doctors can better choose the
treatment best suited for their patients.
Dr Hou Han Wei, a senior research
fellow from NTU's Lee Kong Chian School of Medicine invented the new
chip that forms the key component of the test kit.
"By designing very tiny channels
on our chip, we are able to physically separate the various blood
cells by size into the different outlets, like a coin-sorting
machine," explained Dr Hou.
White blood cells form a significant
part of our body's immune system and a key type known as neutrophils,
is the first line of defense whenever infection or inflammation
strikes.
"Analyzing these separated
neutrophils could help indicate how bad an inflammation is and if
there is an increased risk of infection for diabetic patients,"
said Dr Hou.
Dr Hou's new chip and research findings
were published earlier this year in Scientific Reports, a
peer-reviewed scientific journal under the Nature Publishing Group.
"Hopefully in future,
clinicians can accurately tailor the right combination of drugs and
thus offer a more targeted treatment approach for all diabetic
patients," added Dr Hou, the recipient of the inaugural
Postdoctoral Fellowship offered by the medical school in 2014.
The NTU team discovered that
neutrophils could be used as a biomarker to determine if diabetic
patients are suffering from an inflammation. Using the new test kit,
neutrophils can be easily extracted from a blood sample, and their
behavior and function observed for more efficient inflammation
profiling in additional to the cell count.
In healthy individuals, neutrophils
float free in the blood stream. When there is an acute inflammation
such as during a bacterial or viral infection, they will slow down
and roll along the vessel walls. Once near the site of infection,
they squeeze through the vessel walls and move to the site of the
injury.
In diabetic patients, the neutrophils
roll faster, which means that fewer of them will manage to squeeze
through the vessel wall to tackle the infection.
The increased rolling speeds of
neutrophils correlate closely with cholesterol and c-reactive protein
levels (a biomarker for inflammation) so it provides doctors with a
better indicator of an individual's immune status, Dr Hou explained.
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