Improving Solubility and Bioavailability with Bile Acids

Poor solubility and bioavailability are becoming increasingly problematic for drug developers as more complex molecules are entering the development pipeline. “Bile acids are nature’s surfactants, their primary role is to promote the absorption of fat-soluble nutrients,” says Roger Viney, PhD, chief commercial officer for ICE Pharma—a bile acid expert. “So, depending on the bile acid, you can vary the hydrophilic lipophilic balance [and] improve bioavailability of poorly soluble drugs.”

“Furthermore, the bile acids can play a role as enhancer of permeability,” Viney continues. “[Bile acids are] able to modulate the cell membranes to allow certain drugs to cross the biological barriers more effectively. So, we have examples today, existing examples of oral and injectable applications formulations that use bile acids as excipients, and we are expecting to see this expand into things like transdermal and even nasal applications.”

Bile acids have been used in traditional forms of medicine for thousands of years; however, they did not enter modern and Western medicines until the 1960s, Viney notes. “The past 20 years have seen a very significant amount of research done into bile acids and their recognition that they're more than nature's surfactants, that they're, in fact, signaling molecules that have metabolic function,” he adds. “And so, this kind of research has opened up a whole new field where bile acids can potentially treat oncology, liver diseases, even neurodegenerative diseases.”

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About the speaker

Roger Viney, PhD, is the chief commercial officer for ICE Pharma and is responsible for the global commercial functions. Roger has a 30-year career, starting in R&D and then moving across to sales, marketing, key account management, and business and product management for the pharma market.