Scientists Develop World's Smallest Drug Deliverer
News Apr 12, 2013
This new and improved nanoscale courier may help light up cancer cells and provide a new patient-friendly, viable option to battle cancer.
“No one has ever made a one-pore, super-small silica particle – at 10 nanometers and below – to deliver medicine,” says Ulrich Wiesner, Cornell’s Spencer T. Olin Professor of Materials Science and Engineering. “Clearing this object out of the body quickly also minimizes its impact on the body.”
Wiesner presented the talk, “Cornell Dots: Fluorescent Core-shell Silica Nanoparticles to Interrogate Biological Environments,” at the American Chemical Society meeting in New Orleans on April 7.
Previously, Wiesner and his colleagues had demonstrated the useful, diagnostic aspects of C-Dots. Now, they have illustrated the porous C-Dots (mC-Dots, for mesoporous) concept: The mC-Dots could act like tiny Navy Seals on a seek-and-destroy mission: Find the tumor, deliver medicine to kill it, then escape in urine within a couple of hours.
A single C-Dot consists of dye molecules encased in a chemically inert silica shell that can be as small as 5 nanometers in diameter. (A nanometer is one-billionth of a meter, about three times the diameter of a silicon atom).
Previous research showed that the outside of the shell can be coated with organic molecules that will attach to such desired targets as tumor surfaces or even locations within tumors.
The cluster of dye molecules in a single dot in solution fluoresces near-infrared light much more brightly than single dye molecules, and the fluorescence will identify malignant cells, showing a surgeon exactly what needs to be cut out and helping ensure that all malignant cells are found. But, surgeons may one day forego the scalpel, because with a built-in pore, the mC-Dots have the ability to bring medicine to the tumor.
PhoreMost and o2h Discovery Collaborate to Progress First-in-Class Drug Discovery ProgramsNews
PhoreMost, the UK-based biopharmaceutical company dedicated to drugging ‘undruggable’ disease targets, announced it has entered into a collaboration with o2h discovery (o2h), an Anglo-Indian medicinal chemistry company that has in-house capability to take drug discovery programmes to the IND filing stage.READ MORE
This Seed Could Bring Clean Water to MillionsNews
Biomedical Engineering and Chemical Engineering Professors Bob Tilton and Todd Przybycien recently co-authored a paper with Ph.D. students Brittany Nordmark and Toni Bechtel, and alumnus John Riley, further refining a process that could soon help provide clean water to many in water-scarce regions. The process, created by Tilton’s former student and co-author Stephanie Velegol, uses sand and plant materials readily available in many developing nations to create a cheap and effective water filtration medium, termed “f-sand.”READ MORE
Targeting Epigenetic Proteins to Prevent Breast CancerNews
Researchers have discovered that epigenetic proteins promote the proliferation of mammary gland stem cells in response to the sex hormone progesterone. The study suggests that inhibiting these proteins with drugs could prevent the development of breast cancer in women at high risk of the disease.READ MORE