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Iowa State University colleagues Michael Wannemuehler (left), an immunologist in the College of Veterinary Medicine, and Balaji Narasimhan, a chemical engineer in the College of Engineering, have been collaborating on nanovaccine research for 12 years

Iowa State University colleagues Michael Wannemuehler (left), an immunologist in the College of Veterinary Medicine, and Balaji Narasimhan, a chemical engineer in the College of Engineering, have been collaborating on nanovaccine research for 12 years. Narasimhan is holding a small vial of a nanovaccine formulation for pneumonia.

We think developing nanovaccines using a “systems” approach can revolutionize the prevention and treatment of diseases.

Since 1980 the world has seen more new diseases than medical science knew before 1980, said Balaji Narasimhan, Iowa State’s Vlasta Klima Balloun Professor of Chemical and Biological Engineering and leader of a new project designed to eventually establish a national nanovaccine research center.

“This is scary,” he said. “The diseases we have vaccines for today are the low-hanging fruit. And so people get sick. But we can’t just keep treating these new and re-emerging diseases. That’s too expensive. We have to prevent them.”

Narasimhan thinks nanovaccines are the best arsenal for that fight. Nanovaccines, unlike current vaccines, are based on tiny particles that can send pathogen-like signals to immune cells. They can prevent disease. They can boost the immune system’s own response to disease. Production is quick. Storage is easy. And the technology is sustainable.

“Dream team”

Narasimhan has assembled a team of 51 university, medical school, research hospital, national laboratory and industry researchers to design nanovaccines targeting diseases such as tuberculosis, malaria, biodefense pathogens and cancer. “This is truly one of the dream teams working on vaccine research anywhere in the world,” Narasimhan said.

The research team is being launched with support from a three-year, $1.2 million grant from Iowa State’s Presidential Initiative for Interdisciplinary Research. Iowa State President Steven Leath established the initiative to build research teams capable of competing for large research grants and making major discoveries.

Looking at the whole system

The team will take a “systems approach” to its research and development, Narasimhan said. That means engineers, doctors, biologists, chemists, materials scientists, industry researchers and social scientists will work together throughout the development of nanovaccines.

“When designing a vaccine, we need to think about where it will be deployed, who will use it and how much it will cost right from the onset,” he said. “Right now, that doesn’t happen.”

Narasimhan has worked more than a decade to develop nanotechnology for medical applications. Working with Michael Wannemuehler of Iowa State’s College of Veterinary Medicine, Narasimhan and the staff and students in his lab are producing biodegradable polymer nanoparticles that mimic the size and chemistry of pathogens to trigger appropriate immune responses in the body.

Nanoparticles can also be loaded with medicines and used to slowly deliver drugs to fight off diseases, including brain ailments, lung problems and even cancer.

A bench-to-bedside approach

Narasimhan said the nanovaccine research team already has some successes to report:

The University of Nebraska Medical Center has won an $11 million grant from the National Institutes of Health to study nanomedicines, including a nanovaccine for cancer. And, the Bill & Melinda Gates Foundation awarded Iowa State researchers a $100,000 grant to study single-dose therapies for malaria and filarial diseases such as elephantiasis and river blindness. Success with the initial Gates grant would allow the researchers to apply for an additional grant of up to $1 million.

Narasimhan said the timing is right to win more support for the research team’s new approach to developing nanovaccines: Illnesses such as whooping cough are making a comeback. Bacteria are growing resistant to antibiotics. There are undesirable side effects to some common medicines. And some treatments are too expensive for the developing world.

“This integrated bench-to-bedside approach,” he said, “will translate exciting scientific discoveries to life-saving products.”

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