New Research Suggests Co-administration with Chemotherapy Drugs Most Effective Strategy
Researchers from Case Western Reserve University School of Medicine in collaboration with researchers from Dartmouth Geisel School of Medicine and RWTH Aachen University (Germany) have adapted virus particles that normally infect potatoes to serve as cancer drug-delivery devices for mice.
And in a recent article published in Nano Letters, the team showed injecting the virus particles alongside chemotherapy drugs, instead of packing the drugs inside, may provide an even more potent benefit.
The researchers discovered injecting potato virus particles into melanoma tumor sites activates an anti-tumor immune system response. In addition, injecting the nanoscale plant virus particles simultaneously with a chemotherapy drug—doxorubicin—into tumor sites further helps halt tumor progression in mice. But surprisingly, when the researchers created and injected combination nanoparticles, where the chemo drug is physically attached to the virus particles, there was not a significant added benefit.
The results are the first to show that “vaccinating” mice with potato virus nanoparticles at a cancer site can generate an anti-tumor response. But the results also suggest more complex nanoparticles may not correspond to added therapeutic benefit.
“It’s attractive to want to create multifunctional nanoparticles that can ‘do it all,’” said Nicole F. Steinmetz, senior author on the study, the George J. Picha Professor in Biomaterials, member of the Case Comprehensive Cancer Center and director of the Center for Bio-Nanotechnology at Case Western Reserve School of Medicine. “But this study shows significant therapeutic efficacy, including prolonging survival, requires a more step-wise approach. When the plant-based virus particles and the drugs were able to work on their own, we saw the greatest benefit… Continue reading....
Researchers at Case Western Reserve University are applying drug-delivery technology to agriculture to control parasitic roundworms more effectively and safely.
The tiny roundworms, or nematodes, cause $157 billion in crop failures worldwide each year, other researchers estimate, largely because they’re beyond the reach of pesticides. The chemicals disperse poorly into soil, while the parasites feed at plant roots well below the surface.
As a result, farmers apply large amounts of pesticides, which can increase the chemical concentrations in food or run off and damage other parts of the environment, all of which have costs.
But biomedical engineering researchers at Case Western Reserve may have found an effective solution.
“We use biological nanoparticles—a plant virus—to deliver a pesticide,” said Paul Chariou, a PhD student in biomedical engineering at Case Western Reserve and author of a study on the process published in the journal ACS Nano. “Use of the nanoparticle increases soil diffusion while decreasing the risk of leaching and runoff, reducing the amount of chemical in food crops and reducing the cost to treat crops.”
Chariou worked with Nicole Steinmetz, the George J. Picha Professor in Biomaterials appointed by the Case Western Reserve School of Medicine… Continue reading....
WASHINGTON, D.C.— The American Institute for Medical and Biological Engineering (AIMBE) has announced the pending induction of Nicole F. Steinmetz, Ph.D., Associate Professor, , Case Western Reserve University School of Medicine, to its College of Fellows. Dr. Steinmetz was nominated, reviewed, and elected by peers and members of the College of Fellows For outstanding contributions to advancement of plant virus-based nanomaterials for diagnostics, drug-delivery and immunotherapy in cancer, cardiovascular disease, and others.....