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rapeutic modalities are far from adequate."

These results mark the first ever example of targeted drug delivery using nanoparticle-aptamer bioconjugates. Significantly, the drug delivery was highly specific. Uptake of particles was not seen to be enhanced in cells which did not express the PSMA protein, indicating a selective tumour-targeting action.

"These bioconjugates represent an exciting prospect in the advancing field of cancer nanotechonology and hold significant promise for future cancer treatment," remarked Dr Farokhzad. "Through modification of the controlled-release polymer system or tweaks to the aptamer targeting group it may be possible to produce a diverse range of specific and selective bioconjugates. In this way, drug delivery 'vehicles' can be made to target a myriad of important human cancers. The application of nanotechnology to cancer therapy is expected to result in future therapeutic modalities that are superior to our current approach. Importantly, this is no longer a farfetched science. Nanoscale drug delivery vehicles are getting closer to clinical realisation."

About Prostate Cancer

The prostate is a small gland about the size and shape of a walnut situated just below the bladder and surrounding the urethra. The prostate produces the seminal fluid in which sperm is transported. Prostate cancer begins with small changes in size and shape of the prostate gland cells which can develop into an uncontrolled growth of cells.

Prostate cancer predominantly affects Western populations although the black population has a significantly higher rate than the white population. The lowest incidence is seen in Asian populations.1There are just under 238,000 cases of prostate cancer in Europe each year and it is the cause of 85,000 deaths annually.2

Risk factors associated with prostate cancer include family history of the disease, age (predominantly men over 50 years of age) and a diet high in red m
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Source:University of Pittsburgh Medical Center


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