A new class of medicines could give doctors the ability to awaken underperforming genes in patients who currently have no treatment options.
Boston-area startup RaNA Therapeutics is developing a novel kind of medicine that can boost the activity of genes that may be silenced or underactive and thus cause disease. The medicine would use a small RNA-like molecule that blocks the function of a long RNA molecule that is hampering the expression of such a gene.
By activating genes, RaNA’s medicines could do something completely new, says Jeannie Lee, a molecular biologist at Harvard Medical School and scientific founder of the company. Most drugs work by changing the function or stability of a gene product—for example, by blocking an enzyme that is overly active. “Current therapeutics go after something that is already expressed,” says Lee. “There are currently no methodologies to turn on a gene that is silent.”
RaNA’s technology, which is still at the stage of testing in lab animals, could be used to treat cancers as well as rare genetic diseases. Often, part of the changes that take place in a cancer cell includes silencing of so-called tumor-suppressor genes. And in some genetic diseases, a normal gene may be aberrantly silenced or just weakly expressed.
RaNA’s approach could also target complex metabolic diseases, says Art Krieg, the company’s CEO and cofounder. “In diabetes and other metabolic diseases, there are a lot of different targets that have been identified, and so the ability to reach in and selectively turn on just one gene, we think, is going to have very broad therapeutic applications,” Krieg says.
In lab tests, RaNA has seen a range of effects on gene expression, from a fourfold increase to a 100-fold increase. “It varies from gene to gene,” says Krieg. “It certainly is not rare to see 10-fold increases,” he says.
The company formed less than two years ago and soon thereafter announced $20.7 million in investments from GlaxoSmithKline’s venture fund SR One, Monsanto, and others. The company hopes to start testing its products in patients in 2015, says Krieg. RaNA is keeping mum about which diseases it will target for now. Broadly, Krieg says, the company will go after diseases for which there are currently no drugs available. It’s pursuing leads in diseases involved in the nervous system, inflammation, and a muscle disease. The treatment paradigm would likely involve an infusion once every month or so, says Krieg. Depending on the disease, it could be delivered through a vein, a muscle, or a spinal tap.
A Roomba recorded a woman on the toilet. How did screenshots end up on Facebook?
Robot vacuum companies say your images are safe, but a sprawling global supply chain for data from our devices creates risk.
A startup says it’s begun releasing particles into the atmosphere, in an effort to tweak the climate
Make Sunsets is already attempting to earn revenue for geoengineering, a move likely to provoke widespread criticism.
10 Breakthrough Technologies 2023
These exclusive satellite images show that Saudi Arabia’s sci-fi megacity is well underway
Weirdly, any recent work on The Line doesn’t show up on Google Maps. But we got the images anyway.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.