Tell us briefly about Tularik.
We were founded just over 11 years ago by
me, Bob Tjian from UC Berkeley, and Steve McKnight, who is now at UT
Southwestern in Dallas. The idea was to create a drug
discovery and development company based on an understanding of gene
regulation and
signal transduction pathways—to come up with products that would
interact with particular targets and be small-molecule drugs rather
than protein drugs. I guess you could say we were completely focused
on understanding cellular networks and discovering small-molecule
drugs that could reprogram those networks.
Was there a single technology on
which you were basing this philosophy?
It wasn’t a technology so much as this
idea and hiring very good people. McKnight, Tjian, and I had high
standards in terms of what kind of scientists we were going to hire
to work around the general idea of gene
regulation and signaling pathways. We believed that if we could be a
biological leader in the field and supplement that with the
appropriate chemistry, we could create a new class of drugs.
Now that it’s been over a decade, how do
you feel it’s panned out?
When we set out to do this, we believed it
would take 20 years to build a pharmaceutical company. So we’re a
little over halfway there and we’re sitting in a good position. We
have lots of very interesting targets
and we have, in our view, a deep biological understanding of our
particular areas of focus. That gives us a big advantage. We have
built the chemistry resources we need. We have four drugs in the
clinic now and others are heading there. It will take a few more
years to see how they pan out. We now have the discovery engine in
place that should, on a continual basis, be able to put two
high-quality drugs into clinical testing each year. If we say we get
a 25% success rate, that’s one new drug coming out every two years
once we reach a steady state.
Is a 25% success rate realistic?
It’s pretty hard to say. People have
numbers that are all over the place. Investors always want to hear
higher numbers. The technologies are so good now that you can get
better
drugs going into the clinic, but the reality is drugs fail for all
sorts of different reasons. We have very rigorous standards for what
it takes to get into the clinic. But the jury is out. It’s going
to be five more years before we know whether that 25% is realistic
or not.
Tularik’s most-cited paper is your 1996 Cell
paper, "Dissection of TNF receptor 1 effector functions: JNK
activation is not linked to apoptosis while Nf-Kappa B activation
prevents cell death." What was the motivation and context behind
that work?
That was almost an obvious paper that fell
out of earlier work. I am a little surprised to see it cited that
often. I think maybe why it got cited so much is that it addressed
separate pathways—activation of Nf-Kappa-B by TNF is not only an
interesting pathway in itself, but it feeds back and inhibits the
cell-death pathway at the same time. With both Nf-Kappa-B activation
and cell death being very hot things at the time, this became an
easy paper to cite for both pathways.
Why do you think Tularik’s papers in
general have garnered such a high citation rate?
The company focus is really on getting
drugs, and we make the discoveries required to get there. There is
not a major emphasis on publications per se. We don’t have a lot
of people publishing routine stuff. We emphasize the idea that if we
are going to publish, it should be very significant work. That is
one way to get scientists to focus on drug discovery. Scientists don’t
come here to get publications. They come here because they’re
committed to discovering drugs. Our view is if you do a good job at
discovering drugs, publications will come as a consequence of that.
That is probably one of the major reasons our citation rate per
paper is so high. Our scientists could probably publish twice as
many papers, but that might dilute the impact of the major ones they
do publish.
In what ways does the research process at
Tularik differ from research at an academic laboratory?
We have a lot of flexibility. People move
around. They help out where they’re needed. It’s really a very
different structure than a standard academic laboratory. We have
very small group sizes. The majority of lab heads are full-time
bench scientists. They might have one post-doc and one research
associate working together as a team. They’re also collaborating
very closely with other labs. It’s different from a lot of
academic labs, where you have a big operation sharing the same
physical facility. Here you might have four or five senior scientist
lab heads, who would be professors or associate professors at
universities, all sharing one physical laboratory, working side by
side.
How do patent issues affect what and how
you publish?
On these biological papers it’s not so
complicated. We do have in-house patent counsel, and they will
review publications and file appropriate patents. But I’m not
aware of any time when patent counsel ever held up publication of a
paper. They can work off a draft and can usually get a patent filed
quicker than the authors can get the final manuscript prepared. We
have not yet decided that we’re not going to publish something for
competitive reasons. We figure if it’s important someone else is
going to do it fairly soon anyway, so we might as well get it out
there. It helps establish our position in the field and maybe will
help us get a partnership with a big pharmaceutical company.
Although it might turn them off, too.
We have reached a stage now with
intellectual properties that requires a bit of a different approach.
That’s when we’re dealing with medicinal chemistry, with matters
of the drugs themselves. With drugs that are on their way to being
products, it’s better not to publish until the patents themselves
or the patent applications have been published. That’s usually
about 18 months after submission. We’re just reaching that
transition now. So we’ll probably be having papers coming out
describing some of our drugs or drug candidates that are not written
at the same time the discovery is made but follow about 18 months
later. That is for competitive reasons. If another company gets its
hands on your chemical structure before a patent is issued, it has
the opportunity to do a lot of work to get around your patent.
Where do you see Tularik in 10 years?
I’m hoping that 10 years from now we are a
profitable corporation with substantial product sales of important
new drugs treating important diseases. That’s been our goal all
along. If we’re in that position, there will be a lot of money
pouring back into research to keep the cycle going. Meanwhile, I
think the whole field will benefit from companies taking similar
approaches to what we’re doing. And there will be a lot of drugs
coming out in the next 10 years from this approach of modulating
gene regulation and signal transduction pathways.
What’s the single most significant
lesson you’ve learned since you launched Tularik 11 years ago?
I think it would be about all the steps
required for small-molecule drug development. There are more steps
and more things that can go wrong than in protein drug development.
We’ve been able to solve problems as they come up, but more
roadblocks can be tossed in your way when you’re starting with a
biological observation and trying to come up with a small-molecule
drug that’s going to be safe in humans. If you asked 11 years ago,
would I think we’d be at the stage we are today, I’d have said
no, we’d probably have been further along by now. But, still,
having had the benefit of all these years, I’m able to look back
and say I think we’ve done quite well. I don’t think many people
would start a company if they thought it was going to be 12 years
before they could prove one of their drugs works in the clinic.
Everyone always think it’s going to be faster in the beginning.