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Getting renal with oncology markers
February 2012
SHARING OPTIONS:
SAN DIEGO—Complementing and enhancing its franchise in tumor
marker assets for hematological cancers, TrovaGene Inc., a developer of
trans-renal molecular diagnostics, has obtained an exclusive worldwide license
to mutations of the SF3B1 splicing factor. These mutations have been shown to
be associated with disease progression and chemotherapy response in patients
suffering from chronic lymphocytic leukemia (CLL).
TrovaGene has been building a franchise of proprietary
markers in hematological oncology, including mutations in the nucleophosmin
gene (NPM1), which are today widely used in the diagnosis of acute myeloid
leukemia (AML), and the BRAF V600E mutation for diagnostic use in hairy cell
leukemia.
“We believe that SF3B1 mutations have the potential to
become key components of standard diagnostic panels, with clinical utility in
the management of patients suffering from CLL,” noted Antonius Schuh,
TrovaGene’s CEO, in the news release about the license. “We plan to offer
laboratory-developed tests to detect SF3B1 mutations and to identify
opportunities for the development of in-vitro
diagnostic products incorporating our proprietary markers.”
TrovaGene has what it maintains is “a dominant patent
position as relates to transrenal molecular testing,” and this latest license,
Schuh tells ddn, is an important
addition to making the use of urine-based tests more common in dealing with
cancer, as opposed to blood tests.
TrovaGene has U.S. and European patent applications and
issued patents that cover testing for HPV and other infectious diseases,
cancer, transplantation, prenatal and genetic testing. In addition, it owns
worldwide rights to NPM1, which is used as an informative biomarker for AML.
TrovaGene touts very highly tests that look for cell-free
nucleic fragments that pass through the kidney and are detectable in the urine,
because targeting transrenal markers will allow TrovaGene and its partners to
develop genetic tests that rely on easy-to-obtain urine samples rather than
more invasive methods like bone marrow biopsies or even traditional blood
testing.
“Obviously, there is a convenience factor, since it's easier
to get urine samples than it is to even get blood samples,” Schuh says. “But
also, when you look at tumor-specific mutations, these may be rare events that
you might see only once in a milliliter of blood. So the value proposition is
that you can obtain virtually limitless large volumes of urine effectively as
often as you want, in a way you never could with blood or plasma samples. We're
offering not just value or convenience but also enabling people to address
important health problems and advance personalized medicine.”
Schuh also notes that moving forward with its trans-renal
molecular diagnostics products is helped by the recent acquisition of a
high-complexity CLIA lab in San Diego, which, he tells ddn, “means there is a commercial platform from which we can roll
out many types of tests under CLIA guidelines.”
TrovaGene also noted in its announcement of the licensing
coup that research results suggest that SF3B1 mutations represent important
incremental diagnostic markers beyond TP53 disruptions and NOTCH1 mutations in
CLL patients, and may also provide a therapeutic target for SF3B1 inhibitors,
which are currently in preclinical development.
TrovaGene notes that such finding were recently published in
the Dec. 22 issue of Blood, the
journal of the American Society of Hematology, in an article titled
"Mutations of the SF3B1 splicing factor in chronic lymphocytic leukemia:
association with progression and fludarabine-refractoriness” by Davide Rossi
and colleagues.
Rossi and Gianluca Gaidano at the Amedeo Avogadro University
in Novara, Italy, led the research team, in collaboration with their colleague
Roberto Foa at the Sapienza University in Rome, which discovered the SF3B1
mutations.
“Since CLL is the most frequent type of leukemia in adults,
the discovery of SF3B1 mutations in this disease will affect a large number of
patients worldwide,” Gaidano says. “In particular, SF3B1 mutations may
contribute to the early identification of patients destined to fail standard
treatment, who instead might benefit from more aggressive therapeutic
strategies. Future goals in SF3B1 research include the development of a robust
molecular assay for diagnosis and the exploitation of SF3B1 as a therapeutic
target for this leukemia.”
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