This week’s expert, Hepatologist and Key Opinion Leader Scott Friedman, joins Roger to discuss advances in acceptance of gene therapy and knowledge in other areas of basic liver science. When discussing science, he pays particular attention to findings on the diversity of stellate cells and his interest in CAR-T as a therapy for liver disease.

This conversation starts with Scott discussing gene therapy. Specifically, he applauds the idea that gene therapy is becoming accepted in many diseases after a faulty start years ago, due to an unfortunate patient death in a badly controlled trial. He comments that this acceptance has unique benefits in liver disease because the liver can regenerate so much faster and more efficiently than other organs. He mentions some of the rare liver diseases in which patients are benefiting from gene therapy, and notes that we now have gene therapies and early-stage trials to target PNPLA3 and other genes associated with MASH and MASH cirrhosis.

Next, Scott discusses stellate cells, which he has discussed in earlier episodes of SurfingMASH. Science is increasingly demonstrating how many different types of heterogeneous stellate cells exist. As Scott puts it, these cells "come in many flavors," each of which plays a different role in cell generation or cell death. In fact, the specific therapeutic challenges that present themselves may vary as a patient moves along the pathway from F1 to F2 to F3 to F4. Further, we are learning that there may be several different forms of MASH to present differently at a cellular level. This makes tremendous sense, given that no one drug has proven successful in even a significant majority of patients yet.

As the conversation winds down, Scott shares what he describes as a "sobering note" about the state of research funding in America in 2025. As he notes, there are certain kinds of applied and developmental research that private companies do well, but other kinds of basic research that only occur when funded in public and not-for-profit sectors. As a specific example, he cites CRISPR, initially funded publicly and now in the hands of biotech companies, which is used to treat a variety of diseases more effectively than they could have been treated before, if at all. He also comments that a poor early commercial decision slowed the development of statins.