Protiva BioTherapeutics

Protiva BioTherapeutics was a Canadian biotechnology company based in Vancouver, British Columbia.

To improve prospects of successfully advancing gene therapy techniques, a team of scientists at the University of British Columbia (UBC) led by Dr. Pieter Cullis developed and patented a new form of lipid nanoparticle designed to deliver genetic material to host cells.¹⁾ From 1994 onward, a series of patents were filed describing the technology Cullis and his colleagues created, including the addition of a chemical called polyethylene glycol (PEG) to further increase the LNP’s ability to pass into cells.²⁾

This included a variation on the LNP design that Cullis developed in 2000 with several colleagues including Dr. Ian MacLachlan, which became the basis for a spinoff company the team named Protiva Biotherapeutics, focused entirely on gene therapy.³⁾

Protiva partnered with Roche subsidiary Alnylam Pharmaceuticals in Cambridge, Massachusetts to collaboratively develop products using RNAi to inhibit, or “turn off”, target genes (compared to mRNA, which turns on production of proteins), which bore fruit in a 2006 study demonstrating success silencing genes in monkeys.