Drugs, Viruses, and Robots: Weapons on the Rise for a Better Fight Against Cancer
“If we’re actually going to beat cancer in my lifetime, then we have to change the game,” says Andrew Hessel, founding director at biotechnology company the Pink Army Cooperative and distinguished researcher at Autodesk.
A longtime biologist with a mission to advance synthetic and open-source biology, Hessel has been in the game for the past two decades, going back to the mid-’90s when he managed research operations at the Amgen Institute, located in a cancer hospital in Toronto.
In his career, Hessel discovered that the first key to developing better cancer treatments is to understand the disease and what sets it apart from other diseases. To the layman, cancer is an evil interloper that can quickly spread throughout a person’s body. But as Hessel reveals in his 2014 TEDxDanubia Talk, it’s actually a person’s own cells gone rogue.
“Conceptually, cancer is just an infection with some of your cells that are misbehaving, so it really is like having any other infection,” he says. “You just need the penicillin. The difference is penicillin goes after bacteria, which are all the same. It’s one type of bacterium that’s growing like crazy and overwhelming and crashing the system. So if you take penicillin or an antibiotic specific to that bacterium, it will kill it and you’re fine. But there is no one penicillin for cancer.”
There is, of course, chemotherapy, but chemo poisons both cancer cells and healthy cells. Or as Hessel calls it, “carpet bombing.” But aside from a few targeted drugs that are currently on the market, chemo is still the best approach to blast fast-growing cancer cells.
Unfortunately, the drug-development process for new cancer treatments is a slowgoing, expensive process. It can take more than 10 years to develop a drug and get it legally approved. And timeline issues aside: Is a generic, all-inclusive path to drug development really the right approach to the fight against cancer? Hessel thinks not. After all, cancer is different from person to person, much like every person’s DNA is different.
“Cancer is a unique disease,” he says. “It’s a corruption of your own cells in your own body, and your genome is different than anyone else’s genome, so why companies were pursuing a one-size-fits-all strategy never made sense to me.”
Bring on the Virus!
Doctors and researchers understand that precisely homing in on the cancer cell is the Holy Grail for finding a cure. One such approach to directly target cancer cells is using oncolytic viruses (basically, viruses that seek and destroy cancer cells) as weapons, a promising alternative to the drug-development process.
“Everyone thinks viruses are all bad, but they’re not,” Hessel says. “They do some pretty cool stuff. We can program and manufacture oncolytic viruses in a digital CAD/CAM kind of way. That makes it cheap and fast enough to do.”
The beauty of these types of viruses is that they’re too weak to infect a person’s normal cells, but it’s a different story when matched against a cancer cell.
“Your normal cells, which are healthy and have robust, fully functioning virus-defense systems, just shut it down,” Hessel says. “But the cancer cell is corrupted and broken, and when it gets infected by this weak virus, the cancer cell can’t shut it down.”
So the oncolytic virus continues to grow inside the cancer cell, eventually breaking it down and killing it. And then the virus multiplies and goes on the hunt for more cancer cells to destroy throughout the body. “So it’s actually hacking the cancer cell to become a drug company,” Hessel says.
Of course, if it were that easy, cancer would be a thing of the past, like the eradication of smallpox. But because your body recognizes an oncolytic virus as just that—a virus—your immune system suits up for battle, builds antibodies to kill the virus, and allows the cancer to spread.
3D Printing the Cure
This is where synthetic virology comes into play. The idea is that you 3D print an oncolytic virus using synthetic-biology technology, use it for a couple weeks, and then, once the body builds antibodies to it, create another virus to take its place. “Since you can make it in a matter of days or weeks, we can just keep the cycle of specific medicines flowing,” Hessel says.
The idea of 3D printing drugs or viruses synthetically sounds like science fiction, but biologists are doing it. “We have machines—chemical synthesizers that can hook up to our computers—that print out DNA,” he says. “[Some people have] heard of DNA sequencing, where we pull the DNA out of an organism and convert it to digital code. Most people don’t know you can go the other way; you can take digital code and turn it into DNA.”
But it’s early days for oncolytic viruses. Scientists are still working to refine the therapy to stop antibodies from killing the viruses.
Meanwhile, there are other scientists and inventors working for different cures, such as Shawn Douglas, an assistant professor at UCSF and PhD in biophysics from Harvard. Douglas has been creating what he calls “cancer-fighting robots”—nano particles engineered to target cancer cells.
He also runs the BIOMOD competition, where students from around the world compete on projects to create new innovations in biomolecular nanotechnology. For example, past winners have used DNA, RNA, and proteins to create prototypes for nanoscale therapeutics to fight disease.
Faster, Better, Cheaper
Another approach is robotic testing of chemicals on particular cancers. Rather than developing drugs for millions of people and enduring the arduous process of clinical trials, small drug companies will be able to design and test drugs for the individual.
But robotic testing requires that drug-development costs decrease dramatically in the way that technology—such as building websites and buying computer storage—has become exponentially less expensive. Hessel is optimistic.
“Today, the cost of drug discovery might be 100 million dollars for a big pharma company,” he says. “We think we can drop it by a factor of 10 or 20 just in the next few years and then by another factor of 10 or 20 in a few years after that. So as it becomes smaller, faster, better, cheaper, more automated, more robotic, and more connected, then doing drug discovery using the classic tools could come down to the point where an individual could essentially do their own drug discovery for their own cancer.”
Just like drug development is becoming more accessible, so is DNA sequencing. Companies such as Illumina and Oxford Nanopore are sequencing DNA quickly and cheaply, with Illumina’s HiSeq X processing 20,000 genomes per year at $1,000 a pop. (Compare that to more than $500 million in 2003.)
With the increasing accessibility of drug development, DNA sequencing, and 3D printing viruses, it’s not just up to enterprise organizations to create better cancer treatments. “In the same way musicians are learning, ‘Hey, why do I need all of this infrastructure for the old record industry? Screw it, I can go and publish my own album. I can go and make it in my bedroom,’ that’s exactly where science and research are coming to,” he says.
According to Hessel, while success is still anecdotal for therapies like oncolytic viruses, these are not pie-in-the-sky science fiction stories. The cure for an individual’s cancer could be a small-market drug or a virus that’s tailor-made just for them. And the future fight against cancer is looking brighter by the day.