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5.9 AACR
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The
American Association for Cancer Research (AACR) welcomes José Baselga,
MD, PhD, as president of the organization for 2015-2016.
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“We
hope to extend the use of PARP inhibitors to many other patients and
find combinations with other drugs that will be effective against
ovarian cancer.”
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5.9.1 AACR - sein
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Analysis
of tumor samples from the patients showed that 61 percent had mutations
in the PIK3CA gene. Mayer noted that the BYL719 and letrozole
combination had clinical activity in both patients with and without
these mutations, but a higher proportion of the clinical benefit was
seen in patients with PIK3CA mutations.
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Patel
cautioned that this is a small phase I study that is not statistically
powered to determine which schedule has the best efficacy. This is being
explored further in a phase II study called MANTA, which compares
fulvestrant with or without one of the two schedules of AZD2014 as well
as fulvestrant with another mTOR inhibitor, everolimus.
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“Our
findings are using a new, quantitative and, perhaps, more reliable way
to measure breast density,” McCarthy said. “Our next step will be to see
how quantitative density measures and other imaging biomarkers are
associated with cancer risk, cancer subtype, and stage of diagnosis by
race.”
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MM-302
is an antibody-drug conjugate composed of a HER2-targeted antibody
linked to the cytotoxic chemotherapy liposomal doxorubicin. The HER2
antibody delivers the liposomal doxorubicin to HER2-positive breast
cancer cells.
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Dickler
explained that GDC-0810 is a selective ER degrader and that it works in
a number of ways to prevent estrogen fueling tumor growth. She said
that it not only targets the ER, like the antiestrogen tamoxifen, but
also causes ER degradation.
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“This
finding is relevant to cancer research because people who have poor
glucose control are more likely to develop certain types of cancer, and
it is hypothesized that high concentrations of circulating glucose may
fuel cancer growth and progression."
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“The
latest analysis of our data revealed a 24-week progression-free
survival rate of 27 percent, with an objective response rate of 19
percent, and three of four responses are ongoing.”
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For
every three hours of extra fasting at night women were 20 per cent less
likely to have hyperglycemia - or high blood sugar - a known risk
factor for breast cancer and diabetes.
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5.9.1.1 AACR - sein (observation)
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“These
distinct patterns within the overall breast cancer picture highlight
key research opportunities that could inform smarter screening and
kinder, gentler, and more effective treatment.”
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A
lot of the cases in Rosenberg’s presentation – about half the increase –
is in what is called carcinoma in situ. These are smaller, earlier
cancers, and some experts argue that they shouldn’t be considered
cancers at all.
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The
researchers also predicted that the age distribution of women with new
breast cancers would change by 2030, with the percentage of new cases
occurring in women ages 70-84 expected to increase from 24% to 35% and
that in women ages 50-69 was expected to fall from 55% to 44%.
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5.9.3 AACR - mélanome
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“The
CheckMate -069 results reinforce our belief that the future lies in the
combination of Immuno-Oncology agents, including Opdivo and Yervoy,
that can leverage the immune system in order to offer cancer patients
options with greater efficacy beyond current treatment approaches.”
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In
this phase II, double-blind trial, 142 patients with advanced melanoma
who had not received prior therapy were enrolled. Of these patients, 109
had the normal form of the gene BRAF in their tumors and 33 had BRAF
V600 mutations.
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The
results show that the anonymous woman’s case was anything but a fluke,
as the combination of the two drugs had unprecedented cancer-fighting
potency, but also caused toxicity: 50% of patients had side effects that
were severe or life-threatening.
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The
overall response rate, defined as tumors that shrank by at least 30
percent, was 61 percent for the 72 patients who received the combination
versus 11 percent among the 27 who got Yervoy alone.
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5.9.4 AACR - poumon
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$20
million project will combine targeted therapies and immunotherapy;
Bristol-Myers Squibb contributing $5 million to SU2C to support team.
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The
results also lend further support to the idea that, in many cases,
non-invasive blood tests may be able to detect cancer biomarkers as
effectively as traditional biopsies.
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5.9.5 AACR - CAR-T
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Penn
oncologist Janos Tanyi, who helped lead the Phase 1 study, said the
trial met its primary goal of safety, with no major adverse events seen
after 28 days of treatment. But neither did any of the patients' tumors
shrink.
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5.9.6 AACR - divers
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Diverse pipeline compounds target key cancer pathways.
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The
data to be presented at AACR add to a growing body of evidence
revealing the critical distinctions between hotspot-based testing, which
analyses a single or small set of genes or a specific region in such
genes, and validated comprehensive genomic profiles, which analyze the
entire coding regions of cancer genes and detect all four classes of
genomic alterations.
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“Our data highlight just how difficult it is to do this sort of trial in a poor-prognosis cancer like pancreatic cancer."
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Personalized
pancreatic cancer therapies based on tumor genomics may take too long
to prepare to be helpful, according to a small clinical trial.
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