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New class is in session
June 2012
SHARING OPTIONS:
LONDON—GlaxoSmithKline PLC (GSK) and Yale University
recently established a drug discovery research collaboration to design a
potential new class of medicines that could degrade disease-causing
proteins.
The idea is to combine GSK’s expertise in medicinal
chemistry with Yale’s work on proteolysis targeting chimeric molecules
(PROTACs). According to GSK, PROTAC technology guides disease-causing proteins
to a cell’s “garbage disposal” where they can be destroyed. Mutant or
higher-than-normal amounts of these proteins typically drive disease
progression in areas such as oncology, inflammation and infections, GSK notes,
but many cannot be tackled by traditional ways of making drugs.
“If you think about screening and drug discovery, enzymes
make great drug targets, but they only make up about 20 percent of the entire
proteome of humans,” Dr. Craig M. Crews, executive director of Yale Center for
Molecular Discovery, tells ddn. “So, a significant part of the proteome
currently isn’t addressable using a small-molecule approach, and the question
is how to make this non-drugable part of the proteome pharmaceutically
vulnerable.”
RNAi entered onto the scene with a lot of promise, Crews
adds, but the challenges of making RNAi therapies work in humans are many.
“Companies like GSK are beginning to explore alternative
approaches to go after these targets,” says Crews, who is also a Lewis B.
Cullman Professor of Molecular, Cellular and Developmental Biology and a
professor of chemistry and pharmacology at Yale, and is spearheading the Yale
side of the collaboration with GSK.
Under the agreement, a joint research team will work to show
that PROTACs can be turned into future medicines. GSK will then have the right
to use this technology for multiple disease-causing proteins across all therapy
areas. For each protein-degrading drug that is discovered and developed, Yale
will be eligible for milestone and royalty payments. Several collaborations
between GSK and U.K.-based universities have been announced recently that also
involve jointly working toward common milestones and include an element of
risk-sharing by both parties.
This partnership, however, differs both because of its scope
around a potential new class of medicines and because it is the first such
collaboration between GSK and a U.S.-based academic center.
“With consolidation in the industry, internal research has
been hurt at many companies, and so they are reevaluating the potential for
academic outreach and collaborations with academia,” Crews notes. “The Yale
Center for Molecular Discovery is where Yale’s basic science is reduced to
practice, if you will, for the purpose of making reagents, for example, but
also looking for commercialization opportunities. I’ve seen in the last few
years a growing interest in companies’ willingness to work with academia and
higher interest in setting up industry-academia collaborations, and one of the
things I’m doing in addition to the research side of the GSK collaboration is
to reach out to other researchers in the United States. This is the first U.S.
deal like this that GSK has done, but they would like to do more.”
“This partnership is exploring a new way for promising but
unproven therapeutic approaches to jump from the academic lab more quickly into
the early-stage pharmaceutical pipeline,” said Kris Famm, head of GSK’s Protein
Degradation effort, who will lead the program along with Crews, in the news
release about the deal. “The groundbreaking work Craig and his team have done
may allow us to tackle a whole host of disease-causing proteins that were
previously out of reach for medicines, and it is exciting to work together to
try to realize that promise.”
Scientifically, Crews had already taken the PROTAC
technology up through proof of concept, and that entailed a peptide-based
approach, he says.
“More recently, I have been focusing on small-molecule-based
versions of that initial proof of concept,” he explains. “So, as I am making
these molecules, the driving force is to make them more drug-like. From my
point of view, teaming up with a company like GSK with many decades of making
successful drugs is a good situation for us. Not only do we get a partner who
has experience with this but we also have a path forward for taking it to the
clinic if we’re successful.”
The collaborative work with GSK and Yale is already
underway, with the goal of showing proof of principle for the technology by the
end of this year.
GSK acquires Cellzome for $99 million
LONDON—GlaxoSmithKline PLC (GSK) announced in May 15 the
establishment of an agreement by which it will acquire those shares it does not
already own in proteomics technology company Cellzome. GSK will acquire the
shares for $99 million, and Cellzome will become part of GSK’s research and
development organization.
GSK currently owns a 19.98 percent equity interest in
Cellzome, and after the acquisition, it will assume full control of the
company. In conjunction with the acquisition, Cellzome shareholders, with GSK
included, plan on creating a spinoff company. The spin-off would hold the
rights to those of Cellzome’s assets and activities that GSK does not want to
further develop.
“The acquisition of Cellzome adds significantly to our
scientific capabilities and capacity to characterize drug targets and provides
the opportunity to further enhance GSK’s ability to bring medicines to patients
in a more effective manner,” John Baldoni, senior vice president of Platform
& Technology Science at GSK, said in a press release.
The acquisition is not subject to third party approvals. For
more on this acquisition at the ddn website, click here.
Code: E061217 Back |
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