Nanotechnology: Enabling a Revolution in Nanomedicine
Fifty years after US physicist and Nobel Laureate Richard Feynman predicted “There is plenty of
room at the bottom”, nanotechnology, the science of matter on the scale of atoms, has arrived with
a bang and is beginning to impact all aspects of our society and all industrial sectors (for reference
1nm=1 billionth of a metre; a piece of paper is 100,000 nanometres thick).
The ability to see, manipulate and control materials, devices and systems with nanometer
dimensions is creating new products for our homes, new electronics for our work and play, stronger
and more durable metals and composites for industry and revolutionary new approaches to health
care, diagnostics and therapy.
In nanomedicine, for example, the application of nanotechnology exploits the improved and often
novel, physical, chemical and biological properties of materials at the nanoscale to address clinical
needs in significant diseases and achieve breakthrough in healthcare. Nanotechnology is enabling
the miniaturization of existing devices and tools to enable early detection and diagnosis.
Smaller, faster, cheaper are the key goals here. By integrating quantum dot barcode (QdotB)
nanotechnologies with state-of-the-art, electro-kinetically driven micro-fluidics and fluorescence
detection it is possible to develop hand-held lab-on-a-chip devices which provide a high throughput,
multiplexed analytical tool for rapid screening of infectious diseases. Such lab-on-a-chip devices
represent a sea-change in simplicity, speed and cost for diagnosis. They have the potential to
rapidly detect and identify serum biomarkers for pathogens of several dangerous infectious diseases
in a single sample, eliminating multiple sampling and repeat visits to the clinic. Such systems may
eventually completely replace existing non-portable and expensive bench-top analytical instruments.
On-chip laboratory approaches are equally adaptable to the identification of toxins in environmental
Another advance in nanomedicine is the development of smart nanoparticles for the targeted
delivery of therapeutic agents. For a drug molecule to be effective in treating a disease it must be
able to reach the sick organ or lesion. Tailored nanoparticles offer major advantages: minute size
and high surface area/mass to facilitate transport and delivery; designed with a biodegradable
polymer shell to encapsulate a drug in the core; with a “stealth” outer coating of polymer to prevent
recognition of the drug by the immune system; and a set of peripheral “ligands” to recognize the
target cell receptors. The nanoparticle is taken up by the cell, it attaches to the cancer or lesion
and the biodegradable polymer releases the drug at the site. This is an approach to the delivery of
therapeutic agents which shows great promise for improving disease treatment and is expected to
be a significant growth area in the marketplace for new therapies in the next decade.
About the Author
Dr. Arthur Carty
Dr. Arthur Carty is the board member of the Corporate Advisory Board at Bilcare Global Clinical Supplies (GCS). He provides technology and biotech expertise to Bilcare GCS.
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