Genzyme Introduces New Genetic Test To Complement Lung Cancer Portfolio
Main Category: Lung CancerAlso Included In: Genetics
Article Date: 05 Dec 2006 - 0:00 PDT
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Genzyme Corporation (Nasdaq: GENZ) announced today the commercial availability of a new laboratory test to help identify non-small cell lung cancer (NSCLC) patients who may not respond to targeted therapies. Genzyme's KRAS Mutation Analysis will help identify NSCLC patients who test positive for specific KRAS mutations. Mutations in the KRAS gene have been associated with resistance to certain drugs currently used in treating this deadly form of cancer, including the tyrosine kinase inhibitors (TKIs) Tarceva(R) (erlotinib) and IRESSA(R) (gefitinib).
"Between 15 and 30 percent of tumors from NSCLC patients have mutations in the KRAS gene and clinical studies show that this information plays an important role in making treatment decisions," said Mara Aspinall, president of Genzyme Genetics, the business unit of Genzyme Corp. focused on the research, development and provision of complex testing services. "Genzyme Genetics is currently the only national commercial laboratory in the U.S. to offer this new test. We believe this test will provide physicians and their patients with critical information to help determine how best to move forward with their treatment."
Aspinall went on to state that Genzyme believes that effective cancer treatment is improved by personalized medicine -- directing specific therapies at the patients most likely to benefit from them -- and that this important convergence of diagnostics and therapeutics is a priority for the company.
Recent clinical studies have shown that mutations in the KRAS gene are found more frequently in patients who show limited clinical response or who have a shorter time to disease progression with TKI treatment. A retrospective study published in a 2005 Journal of Clinical Oncology demonstrated a decrease in time to disease progression and in overall survival in KRAS mutation- positive patients when treated with Tarceva plus chemotherapy, versus chemotherapy treatment alone. Conversely, with TKI treatment, NSCLC patients with mutations in the epidermal growth factor receptor (EGFR) gene have shown improved response rates, and longer time to disease progression.
A Growing Lung Cancer Testing Portfolio
In addition to the new KRAS Mutation Analysis, Genzyme Genetics offers two other tests in its portfolio that help identify NSCLC patients likely to respond to TKI therapies:
- EGFR by FISH (fluorescence in-situ hybridization) was launched earlier this year and detects amplification of the EGFR gene.
- EGFR Mutation Analysis Assay detects the presence of EGFR mutations in patients with NSCLC.
TKI therapies, such as Tarceva (erlotinib) and IRESSA (gefitinib), are currently used in NSCLC patients who are refractory, or have failed, one or more chemotherapy regimens. Refractory patients make up approximately 30 percent of the total NSCLC patient population. Clinical studies of Tarceva and IRESSA in the first-line setting are ongoing.
About Lung Cancer
According to the American Cancer Society, lung cancer is the leading cause of cancer death for both men and women. An estimated 162,460 people in the United States will die of lung cancer this year, which is more than the number of those who die each year from colon, breast, and prostate cancers combined. In 2006, there will be an estimated 174,470 new cases of lung cancer in the United States.
About Genzyme Genetics
Genzyme Genetics is a leading, nationwide provider of high-quality, complex testing services for physicians and their patients. With CLIA- certified laboratories and counseling facilities located across the U.S., Genzyme Genetics offers extensive diagnostic testing services, supported by innovative technology and a commitment to quality service and trusted information. Genzyme Genetics is a business unit of Genzyme Corporation.
About Genzyme
One of the world's leading biotechnology companies, Genzyme is dedicated to making a major positive impact on the lives of people with serious diseases. This year marks the 25th anniversary of Genzyme's founding. Since 1981, the company has grown from a small start-up to a diversified enterprise with more than 8,500 employees in locations spanning the globe and 2005 revenues of $2.7 billion. Genzyme has been selected by FORTUNE as one of the "100 Best Companies to Work for" in the United States.
With many established products and services helping patients in more than 80 countries, Genzyme is a leader in the effort to develop and apply the most advanced technologies in the life sciences. The company's products and services are focused on rare inherited disorders, kidney disease, orthopaedics, cancer, transplant and immune diseases, and diagnostic testing. Genzyme's commitment to innovation continues today with a substantial development program focused on these fields, as well as heart disease and other areas of unmet medical need.
This press release contains forward-looking statements, including the statements regarding the ability of KRAS Mutation Analysis to help identify patients who may not respond to targeted therapy for the treatment of NSCLC, to identify patients who test positive for specific KRAS mutations and to provide physicians and patients with critical information regarding treatment, the potential improvement in cancer treatment through personalized medicine, and the ability of EGFR by FISH and EGFR Mutation Analysis Assay to identify patients likely to respond to TKI therapies. These statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected in these forward-looking statements. These risks and uncertainties include, among others, the failure of KRAS Mutation Analysis, EGFR by FISH and EGFR Mutation Analysis Assay to produce diagnostic results as anticipated, the inability for physicians to personalize therapy and improve cancer treatment as expected notwithstanding physicians' access to KRAS Mutation Analysis, the continued availability of KRAS Mutation Analysis, EGFR by FISH and EGFR Mutation Analysis Assay resulting from the lack of commercial acceptance of these tests, including the acceptance of the tests at price levels that are economically viable for Genzyme Genetics, and the risks and uncertainties described in reports filed by Genzyme with the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, including without limitation the information under the heading "Factors Affecting Future Operating Results" in the Management's Discussion and Analysis of Financial Condition and Results of Operations section of the Genzyme Quarterly Report on Form 10-Q for the quarter ending September 30, 2006. Genzyme cautions investors not to place substantial reliance on the forward-looking statements contained in this press release. These statements speak only as of the date of this press release, and Genzyme undertakes no obligation to update or revise the statements.
Tarceva(R) is a registered trademark of OSI Pharmaceuticals, Inc. IRESSA(R) is a registered trademark of AstraZeneca UK Limited. Genzyme(R) is a registered trademark of Genzyme Corporation. All rights reserved.
Genzyme's press releases and other company information are available at http://www.genzyme.com/ and by calling Genzyme's investor information line at 1-800-905-4369 within the United States or 1-703-797-1866 outside the United States.
Genzyme
http://www.genzyme.com/
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Combination Cellular And Gene-Based Testing
posted by Gregory D. Pawelski on 5 Dec 2006 at 10:16 pmCancer occurs when cells lose the molecular mechanisms that control their growth and death, resulting in uncontolled cell proliferation and form tumors. These molecular mechanisms are contolled by genes encoded in the DNA of the cell, and acquired mutations or other changes in these genes lead to loss of control. Therefore, cancers are genetic diseases. But, each individual tumor, even those of the same general type will have different mutations, the consequences of which may be altered by the tissue environment, which can in turn be influenced by the external environment. The result is that cancers are even more different from each other than the individuals affected.
This heterogeneity means that a particular drug will rarely be effective against all tumors of a particular type, and the degree of efficacy will vary between patients. Also, as a result of their original mutations, many tumor cells acquire the ability to adapt rapidly to changes in their environment, sometimes by further mutation, often by molecular changes which induce resistance to the drugs used to treat them. Further courses of chemotherapy then select for resistant cells, and the treatment eventually fails to control the tumor.
To overcome the problems of heterogeneity and prevent rapid cellular adaptation, oncologists are able to tailor chemotherapy to individual patients. This is done by testing the tumor cells to see if they are susceptible to particular drugs, before giving them to the patient. Many hope that molecular tests may hold the key to success, particularly as more specific drugs are designed to hit the molecular changes that are responsible for the uncontrolled growth of cancer cells. However, most tests that are now in use have limited predictive accuracy.
So how about exposing cancer cells to the drug and testing their effect? You need to expose the cancer cells to the drugs without altering their behavior from the original tumor. It is not possible to remove the non-cancer cells from the tumor without doing this. But certain assay culture methods can get rid of the non-cancer cells before the end of the culture period. These cell culture assays have contributed to the molecular understanding of chemosensitivity and resistance.
Cell culture assay tests with cell-death endpoints are effective in identifying gene expression patterns that correlate with clinical drug resistance. Gene expression definitions of sensitivity and resistance are significantly and independently associated with treatment outcome.
Cell culture assays are the Rosetta Stone which allows for identification of clinically relevant gene expression patterns which correlate with clinical drug resistance for different drugs in specific diseases. There is no single gene whose expression accurately predicts therapy outcome, emphasizing that cancer is a complex disease and needs to be attacked on many fronts.
A number of cell culture assay labs across the country have data from tens of thousands of fresh human tumor specimens, representing virtually all types of human solid and hematologic neoplasms. Cell culture assay labs have the Rosetta Stone database necessary to define sensitivity and resistance for virtually all of the currently available drugs in virtually all types of human solid and hematologic neoplasms.
I believe that improving cancer patient diagnosis and treatment through a combination of cellular and gene-based testing will offer predictive insight into the nature of an individual's particular cancer and enable oncologists to prescribe treatment more in keeping with the heterogeneity of the disease. The biologies are very different and the response to given drugs is very different.
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