LOS ANGELES, Nov. 5, 2012 /PRNewswire/ --Response Genetics, Inc. (RGDX), a company focused on the development and sale of molecular diagnostic tests for cancer, announced today the launch of testing for ROS1 gene rearrangements. Recently, the Massachusetts General Hospital Cancer Center ("MGH") published studies showing that ROS1 driven tumors are sensitive to the FDA approved drug XALKORI1 (crizotinib)2 to treat non-small-cell lung cancer ("NSCLC") patients with ALK gene rearrangements. Tumors driven by rearrangements in the ROS1 gene represent an additional 1 to 2 percent of patients who may be candidates for crizotinib therapy.3 The company will offer both fluorescence in situ hybridization ("FISH") and polymerase chain reaction ("PCR") based ROS1 translocation testing.

"We are pleased to add ROS1 to our growing test menu," said Thomas Bologna, chairman and CEO of Response Genetics. "We believe the dual option of FISH and PCR represent a unique offering and is consistent with our Leave No Stone Unturned program whereby we go to great lengths to help patients receive optimal therapy. While FISH is the technology that has been used for ROS1 to date, PCR has the advantage of providing additional information about the variant found, information that may be useful for evaluating response and resistance mechanisms.This promising new marker is now readily available to pathologists and oncologists seeking fast turnaround time and utilizes the company's proprietary methods that enable results on very small biopsies including fine needle aspirates."

ROS1 supplements the company's recently introduced Leave No Stone Unturned program, in which patients whose tumors test negative for the ALK Break Apart FISH assay receive follow-up ALK testing using the company's proprietary EML4-ALK RT-PCR-based assay at minimal additional cost. With the addition of ROS1, ordering clinicians can now make a more complete evaluation of each of their NSCLC patients as candidates for crizotinib therapy.

1 XALKORI is a registered trademark of Pfizer, Inc. 2 Bergethon et. al. "ROS1 rearrangements define a unique molecular class of lung cancers." Journal of Clinical Oncology 2012 Mar 10;30(8):863-70. Epub 2012 Jan 3. 3 Ibid

About Response Genetics, Inc.

Response Genetics, Inc. (the "Company") is a CLIA-certified clinical laboratory focused on the development and sale of molecular diagnostic tests for cancer. The Company's technologies enable extraction and analysis of genetic information derived from tumor cells stored as formalin-fixed and paraffin-embedded specimens. The Company's principal customers include oncologists and pathologists. In addition to diagnostic testing services, the Company generates revenue from the sale of its proprietary analytical pharmacogenomics testing services of clinical-trial specimens to the pharmaceutical industry. The Company's headquarters is located in Los Angeles, California. For more information, please visit http://www.responsegenetics.com.

Forward-Looking Statement Notice

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Response Genetics, Inc. to Offer ROS1 Testing for Lung Cancer