Tag Archive | "Memorial Sloan-Kettering Cancer Center"

Pivotal test readied for Pfizer’s promising lung cancer drug

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Researchers at the Moores UCSD Cancer Center are gearing up for a late-stage trial of Pfizer’s crizotinib, preparing a pivotal test to see if the promising therapy can help a unique subgroup of patients with treatment-resistant lung cancer.

Scientists want to test how effective the therapy is among patients whose ALK gene has fused with the EML4 gene, which generates a protein that fires up cancer cell growth. About four percent of all patients with non-small cell lung cancer develop the enzyme. In early and mid-stage trials 57 percent of patients had their tumors reduced and at eight weeks of treatment 87 percent showed disease stabilization. The data dump on the drug at ASCO recently stirred intense interest in the drug. Mark Kris at Memorial Sloan-Kettering Cancer Center called it an “absolutely huge deal.”

“The results of the first two trials have been very encouraging,” said Lyudmila Bazhenova, MD, assistant clinical professor at UC San Diego School of Medicine and a member of the Moores UCSD Cancer Center. “The Phase III clinical trials will be critical in determining if this drug goes to market.”

In the Phase III trial, treatment-resistant patients will either be treated with crizotinib or a standard chemotherapy. And patients in the chemo arm will be given crizotinib if they don’t respond to standard therapy.

Source: FierceBiotech

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Ziopharm soars on promising cancer data

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Shares of Ziopharm Oncology zoomed up 37 percent this morning after the developer released promising mid-stage data on its cancer drug Zymafos. The company decided to stop enrolling new patients into the trial after hitting its primary endpoint. Zymafos, or palifosfamide, is intended to treatment patients with unresectable or metastatic soft-tissue sarcoma.

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In the trial, sarcoma patients were divided into two groups, with one receiving doxorubicin alone and the other group taking a combination of doxorubicin and palifosfamide. According to the company, a total of 58 patients have been evaluated for progression-free survival with 19 documented PFS events (doxorubicin alone = 3 events; palifosfamide + doxorubicin = 6 events) based on a three month median follow-up time.

“The hypothesis of the randomized Phase II trial design for this very difficult to treat cancer population has been validated and the interim results are promising and supportive of a pivotal trial,” said Robert Maki, MD, PhD, co-leader of the adult sarcoma program at Memorial Sloan-Kettering Cancer Center.

Source: FierceBiotech

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Gene allows cancer to enter brain

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A gene that allows cancer to spread into the brain has been identified by US scientists.

The brain is well protected by a network of defences, and it can be very difficult for foreign substances such as viruses and drugs to gain access.

But scientists have discovered a gene which appears to give spreading breast cancer cells a “free pass”.

The study, published in the journal Nature, raises hopes of new drug therapy to stop cancer spread.

The brain is protected by a densely-packed network of tiny blood vessels known as the blood-brain barrier.

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This barrier prevents cells and molecules circulating in the general bloodstream from entering the brain tissue.

Breast cancer can spread to the brain, but usually only does so years after the primary tumour has been removed – suggesting that the remaining cancer cells must acquire specialised properties to breach the brain’s defences.

Three genes

The researchers, from the Memorial Sloan-Kettering Cancer Center, examined tissue samples, and used sophisticated genetic analysis to try to determine how this takes place.

They identified three genes in mice which are involved in the spread of breast cancer to the brain.

Two of the genes – COX2 and HBEGF – have already been shown to help breast cancer invade the lungs, suggesting they play a general role in the spread of secondary tumours.

But the third gene, ST6GALNAC5, appeared only to be involved in helping the cancer penetrate the brain.

This gene seems to work by helping breast cancer cells “stick” to blood vessels in the brain, which allows them to slip through into the brain tissue.

Without ST6GALNAC5, the cells fail to breach the blood-brain barrier.

Important implications

Liz Baker, senior science information officer at Cancer Research UK, said: “While this work is at an early stage, and was only carried out in mice, it could have important implications for breast cancer treatment in the future.

“Around 10% of breast cancers that spread will travel to the brain, and the outlook for these patients can be quite poor.

“Cancer spread is one of the most challenging aspects of the disease so we welcome this discovery.”

Professor Sir David Lane, Cancer Research UK’s chief scientist, described the study as “very exciting”.

He said: “The genes they’ve identified could become good targets for new drugs as well as some existing medicines, so they offer hope of being able to block this particular form of metastasis.

“One of the reasons why cancer is so hard to treat unless we catch it early is because it spreads.”

Source: BBC NEWS

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President-Elect Obama’s Choices for Key Science Posts Hailed

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President-Elect Barack Obama’s recent appointment of four scientific luminaries to major posts in his new administration marks an ambitious attempt to improve U.S. science policy and implementation, especially in light of President Bush’s  reluctance to move forward on addressing global warming and his opposition to new embryonic stem cell research initiatives.

Obama named John Holdren, Ph.D., a Harvard physicist, as his Science Advisor and Director of the Office of Science and Technology Policy, and Jane Lubchenco, Ph.D., a marine biologist at Oregon State University, as head of the National Oceanic and Atmospheric Administration.

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He also selected Nobel Prize-winning cancer researcher Harold Varmus, M.D., former director of the NIH and current president of the Memorial Sloan-Kettering Cancer Center, and Eric Lander, Ph.D., founding director of the Broad Institute and an elite MIT biologist who was a driving force in the Human Genome Project, as Cochairs of the President’s Council of Advisors on Science and Technology.

An avid technophile, as evidenced by the image of his ever-present cell phone and masterful use of the internet during the presidential campaign, the President-Elect is well versed and conversant on a wide range of health and technology issues. Obama supports making math and science education a priority. In addition, he has long been an advocate of increased embryonic stem cell studies and more funding for NIH research.

Obama wants to create an inter-agency task force on genomics research, modernize FDA review of genomics tests, and expand support to genomics researchers, including funding and creating a new mechanism to allow researchers across the country to access and analyze genomics research, according to Steve Murphy, M.D., the founder of a personalized medicine practice in New York City and clinical genetics fellow at Yale University.

“As president, Obama will continue to support advances in personalized medicine to help ensure early detection and treatment of cancer and other diseases,” notes Dr. Murphy.

Right for Life Science Tools and Omics Research
It would seem that Drs. Varmus and Lander fit right into Obama’s plans for biotechnology. Both have extensive research experience in genomics and cellular biology and each brings strong administrative expertise gained from their positions at their respective institutions.

“Eric Lander is one of the great thought leaders in genetics and bioinformatics and he has helped transform biology,” says David Botstein, Ph.D., professor of genomics and director of the Lewis-Sigler Institute for Integrative Genomics at Princeton University. “Who better to advise the president on such issues than Dr. Lander.”

John Coffin, Ph.D., principal investigator and American Cancer Society Research professor in the department of biology at Tufts University, considers Dr. Varmus a scientific colleague and sometimes a competitor. “We have worked together on a number of projects including a couple of books. I have huge respect for him as a scientist, scholar, administrator, and leader. Since the election, I had hoped that he would find a senior leadership position in the new administration and am delighted to hear that he has been appointed to such a role.”

“Harold has an extraordinary sense of quality in science as well as a knack for presenting it to lay audiences like members of the United States Congress. These characteristics served him (and us) very well when he was NIH director. I think the scientific community and President-elect Obama also will be well served by his appointment to this position.”

Earlier this week, Isaac Ro and Jing (Judy) Dai, life science tools (LST) and services analysts at the healthcare equity research firm Leerink Swann wrote an upbeat industry update for their companies in relation to Drs. Varmus and Lander. “We think [their] recent appointments are positive for LST spending in general and for genomics in particular.

“Both Varmus and another key appointment, Eric Lander, are highly regarded experts in the field of genomics. We think increased funding in favor of high-density genotyping and next-generation sequencing is now more likely to continue under the Obama Administration, thanks to these appointments.”

Global Warming and the Environment
Obama wants to tackle global warming by weaning America away from overseas oil and supporting the development of energy alternatives such as biofuels, wind, and solar power. “Few challenges facing America, and the world, are more urgent than combating climate change,” he said in a recent video.

“The science is beyond dispute, and the facts are clear. Sea levels are rising. Coastlines are shrinking. We’ve seen record drought, spreading famine, and storms that are growing stronger with each passing hurricane season. Climate change and our dependence on foreign oil, if left unaddressed, will continue to weaken our economy and threaten our national security.”

Thus the appointments of Drs. Holdren and Lubchenco can be viewed as those of symbolic generals who will lead the battle against global warming. Dr. Holdren has spent much of his career focused on energy and climate change research. In an opinion piece published in 1998 for the American Physical Society, Dr. Holdren wrote that “the greenhouse gas most responsible for the growing threat of human-induced disruption of climate is carbon dioxide, some of it emitted by deforestation, but mostly coming from the combustion of fossil fuels.” To effectively deal with the greenhouse issue, he called for “increased investments in the science of climate and climate-change impacts.”

Jim Greenwood, president and CEO of the Biotechnology Industry Organization, applauded the choice of Dr. Holdren. “President-elect Obama’s comments on the importance of scientific discovery and his appointment of Professor John Holdren indicate that the incoming Administration is truly committed to continuing America’s global leadership in technological innovation,” says Greenwood. “The country that invented the airplane, the jet engine, and the internet can continue to lead the world in innovation given the proper investment incentives and public policies.”

In granting a Heinz Award to Dr. Lubchenco for her research on the environment, the award staff noted that “Dr. Jane Lubchenco was one of the first scientists to present this dilemma [of drastic climate and ecological change] to policy makers and the public. A firm believer in the ability of science to improve the quality of human and ecological life, she has been a pioneer in the practice of creating environmental policy through the widest distribution of scientific research.”

Pharma May Not Rejoice
Despite the overall optimism on President-Elect Obama’s choices for these important science and technology positions, some in the pharmaceutical industry remain concerned over Obama’s stated intention of getting drug prices under control. His goals to increase the use of less expensive generic drugs, permit the importation of cheaper drugs from developed countries, and allow Medicare to negotiate directly with pharmaceutical and biotech companies to obtain lower drug prices make a number of drug industry officials nervous.

So it should not come as a surprise if they don’t join the chorus singing “Hail to the Chief” on January 20.

Source: GEN News

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Exelixis Reports Positive Phase 1 Data for XL281

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Exelixis, Inc. (Nasdaq:EXEL) today reported preliminary phase 1 data from a dose-escalation trial of XL281 in patients with advanced solid malignancies. XL281 is a novel, selective, and potent small molecule inhibitor of wild-type and mutant RAF kinases that have been implicated in human cancer. Gary K. Schwartz, MD, Chief, Melanoma and Sarcoma Service, Memorial Sloan-Kettering Cancer Center, and an investigator on the phase 1 trial, presented the data in a poster session (Abstract #383) at the EORTC-NCI-AACR Symposium on Molecular Targets and Cancer Therapeutics, which is being held October 21-24 in Geneva, Switzerland. The poster will be available today on the Exelixis web site. Read the full story

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