Data Presented at ASCO 2010 by M. D. Anderson Researchers Demonstrate the ability of miRview™ mets to Identify the Most Likely Origin of Metastases in Cancer of Unknown Primary

2010 American Society of Clinical Oncology Annual Meeting

REHOVOT, Israel & PHILADELPHIA--()--Rosetta Genomics, Ltd. (NASDAQ: ROSG), a leading developer and provider of microRNA-based molecular diagnostic tests, announces new, interim data from an ongoing prospective study conducted in collaboration with researchers from the University of Texas, M. D. Anderson Comprehensive Cancer Center (MDACC), and presented at ASCO 2010. The ongoing study is designed to examine the ability of miRview mets to identify the most likely primary origin of metastases in patients with cancer of unknown primary (CUP). This was achieved by correlating the predicted primary origin assigned by miRview mets with the comprehensive diagnostic work-up conducted at MDACC, which included surgical pathology, laboratory tests, imaging and a treatment-response follow-up.

Out of the 89 patients who participated in the study to date, data reported at ASCO 2010 demonstrated miRview mets was able to identify the most likely origin of metastases origin in 84% of the 62 cases that were successfully processed.

The poster included an example of a 73 year old CUP patient initially thought to have lung cancer. Following results generated by miRview mets a diagnosis of colon cancer was made, enabling optimal treatment course.

“The performance of our miRview mets test, as validated by the MDA clinicians, matched the results we achieved in our validation study for the assay, and demonstrates how well the test performs in the ‘real world clinical setting’. During this study, miRview mets has provided MDACC’s clinicians with valuable information critical to the optimal treatment of CUP patients,” noted Kenneth A. Berlin, President and CEO of Rosetta Genomics. “The results of this study are a testament to the overall scientific strength of Rosetta’s microRNA platform technology to discover, develop and commercialize clinically useful biomarkers.”

About microRNAs

MicroRNAs (miRNAs) are recently discovered, small RNAs that act as master regulators of protein synthesis, and have been shown to be highly effective biomarkers. MicroRNAs’ unique advantage as biomarkers lies in their high tissue specificity, and their exceptional stability in the most routine preservation methods for biopsies, including Formalin Fixed Paraffin Embedded (FFPE) block tissue and fine needle aspirate (FNA) cell blocks. It has been suggested that their small size (19-21 nucleotides) enables them to remain intact in FFPE blocks, as opposed to messenger RNA (mRNA), which tends to degrade rapidly. In addition, early preclinical data has shown that by controlling the levels of specific microRNAs, cancer cell growth may be reduced. To learn more about microRNAs, please visit www.rosettagenomics.com .

About miRview™ Products

miRview™ are a series of microRNA-based diagnostic tests developed by Rosetta Genomics. miRview™ mets accurately identifies the primary tumor site in metastatic cancer and Cancer of Unknown Primary (CUP) patients. miRview™ squamous accurately identifies the squamous subtype of NSCLC, which carries an increased risk of severe or fatal internal bleeding and poor response to treatment for certain targeted therapies. miRview™ meso diagnoses mesothelioma, a cancer connected to asbestos exposure, from other carcinomas in the lung and pleura. This test can be used to rule out mesothelioma in patients diagnosed with a tumor in the lung or pleura, who may have been exposed to asbestos in the past. miRview™ tests are designed to provide objective diagnostic data; it is the treating physician’s responsibility to diagnose and administer the appropriate treatment. The company’s tests are now being offered through distributors around the globe. For more information, please visit www.mirviewdx.com .

About Rosetta Genomics

Rosetta Genomics is a leading developer of microRNA-based molecular diagnostics. Founded in 2000, the company’s integrative research platform combining bioinformatics and state-of-the-art laboratory processes has led to the discovery of hundreds of biologically validated novel human microRNAs. Building on its strong patent position and proprietary platform technologies, Rosetta Genomics is working on the application of these technologies in the development of a full range of microRNA-based diagnostic tools. The company’s first three microRNA-based tests, miRview™ squamous, miRview™ mets and miRview™ meso, are commercially available through its Philadelphia-based CAP accredited, CLIA-certified lab. Rosetta Genomics is the 2008 winner of the Wall Street Journal’s Technology Innovation Awards in the medical/biotech category. To learn more, please visit www.rosettagenomics.com .

Forward-Looking Statement Disclaimer

Various statements in this release concerning Rosetta’s future expectations, plans and prospects, including without limitation, statements relating to the role of microRNAs in human physiology and disease, and the potential of microRNAs in the diagnosis and treatment of disease, constitute forward-looking statements for the purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors, including risks related to: Rosetta’s approach to discover microRNA technology and to work on the application of this technology in the development of novel diagnostics and therapeutic tools, which may never lead to commercially accepted products or services; Rosetta’s ability to obtain, maintain and protect its intellectual property; Rosetta’s ability to enforce its patents against infringers and to defend its patent portfolio against challenges from third parties; Rosetta’s need and ability to obtain additional funding to support its business activities; Rosetta’s dependence on third parties for development, manufacture, marketing, sales, and distribution of products; Rosetta’s ability to successfully develop its products and services; Rosetta’s ability to obtain regulatory clearances or approvals that may be required for its products and services; the ability to obtain coverage and adequate payment from health insurers for the products and services comprising Rosetta’s technology; competition from others using technology similar to Rosetta’s and others developing products for similar uses; Rosetta’s dependence on collaborators; and Rosetta’s short operating history; as well as those risks more fully discussed in the "Risk Factors" section of Rosetta’s Annual Report on Form 20-F for the year ended December 31, 2009 as filed with the Securities and Exchange Commission. In addition, any forward-looking statements represent Rosetta’s views only as of the date of this release and should not be relied upon as representing its views as of any subsequent date. Rosetta does not assume any obligation to update any forward-looking statements unless required by law.

Contacts

Media Contact:
Rosetta Genomics, Ltd.
Ron Kamienchick, 215-382-9000 ext 318
investors@rosettagenomics.com
or
Investors Contacts:
Lippert/Heilshorn & Associates
Anne Marie Fields, 212-838-3777 x6604
afields@lhai.com
or
Bruce Voss, 310-691-7100
bvoss@lhai.com

Contacts

Media Contact:
Rosetta Genomics, Ltd.
Ron Kamienchick, 215-382-9000 ext 318
investors@rosettagenomics.com
or
Investors Contacts:
Lippert/Heilshorn & Associates
Anne Marie Fields, 212-838-3777 x6604
afields@lhai.com
or
Bruce Voss, 310-691-7100
bvoss@lhai.com