What is Big Think?  

We are Big Idea Hunters…

We live in a time of information abundance, which far too many of us see as information overload. With the sum total of human knowledge, past and present, at our fingertips, we’re faced with a crisis of attention: which ideas should we engage with, and why? Big Think is an evolving roadmap to the best thinking on the planet — the ideas that can help you think flexibly and act decisively in a multivariate world.

A word about Big Ideas and Themes — The architecture of Big Think

Big ideas are lenses for envisioning the future. Every article and video on bigthink.com and on our learning platforms is based on an emerging “big idea” that is significant, widely relevant, and actionable. We’re sifting the noise for the questions and insights that have the power to change all of our lives, for decades to come. For example, reverse-engineering is a big idea in that the concept is increasingly useful across multiple disciplines, from education to nanotechnology.

Themes are the seven broad umbrellas under which we organize the hundreds of big ideas that populate Big Think. They include New World Order, Earth and Beyond, 21st Century Living, Going Mental, Extreme Biology, Power and Influence, and Inventing the Future.

Big Think Features:

12,000+ Expert Videos


Browse videos featuring experts across a wide range of disciplines, from personal health to business leadership to neuroscience.

Watch videos

World Renowned Bloggers


Big Think’s contributors offer expert analysis of the big ideas behind the news.

Go to blogs

Big Think Edge


Big Think’s Edge learning platform for career mentorship and professional development provides engaging and actionable courses delivered by the people who are shaping our future.

Find out more
With rendition switcher


Sarah Schlesinger: The first is a DNA vaccine, which is called Advac, which we first tested in 2003, 2004. DNA vaccines are wonderful in that they are very safe. They’re cheap. They don’t require a cold chain. They work great in mice, and they don’t work very well in people. So we tested that, and it was modestly immunogenic, which is as good as one might hope for DNA vaccines. The idea was it would be combined with ADMVA, which is based on the smallpox vaccine.

It’s modified vaccine Ankara, so we know that the smallpox vaccine induces good immunity, so the idea like with the adeno viral vector is to use the smallpox vaccine as a vector. And so that’s what we did, and we conducted a trial of that alone, and then a small trial of the two together. Those are being moved forward by Dr. Ho and his team in China, and they’re moving into advanced development. So you have Phase One trials, which is what we conducted, which are largely safety. We also, of course, looked at immunogenicity, because we’re not going to give something to people and not figure out if it’s doing something. And the they move into larger trials. In order to move into larger trials, you have to move into a population of people who are getting infected, because you need to look for efficacy.

These vaccine were always designed to move forward for efficacy trials into China. Because of the number of infections in the developing world versus the United States, most efficacy trials have been and will continue to be conducted in the south or the developing world. So I’d stay in New York. No. I’ve gone to China a couple of times, but my work is primarily here at the Rockefeller Hospital. So currently what I’m working on, which is very exciting, and this is under the rubric of the grant challenges and global health grant mechanism through the Bill and Melinda Gates Foundation, and the FNIH, the Foundation for NIH, and Ralph Steinman, who I mentioned 17 million times in this conversation, is the intellectual force behind this and the PI of the grant, and I have the privilege of doing the clinical part. But we are developing a vaccine that directly targets dendritic cells.

So I think I mentioned earlier that for any vaccine to work, we know it has to get to dendritic cells. You can demonstrate with a lot of them that they do to greater or lesser degrees. But we’ve sort of decided to take the bull by the horn and make a vaccine that knows how to find dendritic cells. It’s what called rational vaccine design, and I think it’s brilliant. And I can say that because I didn’t think of it. I get to conduct it, but I didn’t figure it out. The idea is we have a monoclonal antibody that’s directed against what’s called DEC05. DEC205 is on dendritic cells. It’s a marker that’s special on dendritic cells that was discovered by Ralph and my friend and colleague, Michelle Nussenzweig [ph?] many years ago. So they made an antibody to it. So that antibody goes into the body and immediately finds that receptor. And so then we’ve hooked up to that monoclonal antibody genes or the antigen for HIV.

The one we’re starting with is GAD, which is the core, which is conserved, and there are lots of reasons that’s a good one to start with. So we have a monoclonal antibody that knows how to find dendritic cells hooked up to our HIV antigen. This is a protein. And so we’ve been moving that concept forward in small animals, and now we are going to be moving into the clinic. And so we have our first conversation about this with the FDA in August, and I’m hoping that we’ll be in the clinic by year’s end. So the idea is we have to be smarter than nature. We can’t, because natural infection doesn’t confer protection, we have to figure a way around what the virus that causes AIDS HIV has learned how to do. And to do that, we want to directly target dendritic cells, the cells that we know orchestrate immunity.


Recorded on: June 10, 2008



Race for the Cure

Newsletter: Share: