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SCVNews.com | CSUN Biology Team Breaks New Ground in Cancer Research | 09-14-2016
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1876 - California oil industry born as CSO No. 4 in Pico Canyon becomes state's first commercially productive oil well [story]


| Wednesday, Sep 14, 2016
From left: CSUN biology graduate student Yvess Adamian, biology professor Jonathan Kelber, and biology graduate student Malachaia Hoover work recently published an article announcing a novel and groundbreaking method to extracting RNA from tissue samples. Photo by David J. Hawkins.
From left: CSUN biology graduate student Yvess Adamian, biology professor Jonathan Kelber, and biology graduate student Malachaia Hoover work recently published an article announcing a novel and groundbreaking method to extracting RNA from tissue samples. Photo by David J. Hawkins.

Hundreds of millions of cancer samples, each the size of a saltine cracker, have been archived across the globe. These samples contain genetic information that can radically improve cancer patient survival – even curing difficult-to-treat tumor types. Extracting this information out of these cancer samples has been a major bottleneck to progress in oncology research — until now.

California State University, Northridge cancer researchers have developed a novel method for extracting these genetic data from archived pancreatic cancer tissue — this cancer type is known for its very low survival rate at only 7 percent — with results that could enable major future breakthroughs for this disease. Their research was published in the September edition of the journal Oncotarget, and will directly address recommendations made to the National Institutes of Health in response to United States Vice President Joe Biden’s Cancer Moonshot Initiative, announced last February, which is slated to provide $1 billion toward cancer research efforts.

Biology professor Jonathan Kelber and two graduate students, Malachaia Hoover and Yvess Adamian, integrated a miniature blender-like tool the size of an eraser head into a standard method for purifying Ribonucleic Acid (RNA) from these archived samples. They hypothesized that the microHomogenizerTM (mH), developed by Claremont Biosolutions whose associates collaborated on the article, would effectively liberate the trapped molecular information from these samples – something that is very difficult to do because they are preserved in a formalin-fixed paraffin-embedded (FFPE) cube.

Kelber explained that the samples are readily available for research, but the material within them is usually compromised because of the way they are preserved.

“We have a lot of tools to study this molecular information [in these FFPE samples],” Kelber said. “The problem is getting information out of them – it is a tedious task fraught with all kinds of challenges. The molecules get cross linked and you can’t break them apart. The integrity of the material is compromised. [The mH] liberates more [RNA] from these samples, and we think that by liberating more than you would with standard methods, you get better quality material that is then available for a variety of downstream applications — that’s a big breakthrough.”

The FFPE samples used in this study were generated from human pancreatic tumors surgically implanted and grown in the pancreata of mice — a cancer research method known as orthotopic surgery and developed by article collaborator Dr. Robert Hoffman, a professor of surgery at the University of California, San Diego. The procedure takes place at AntiCancer, Inc. which was founded by Hoffman.

Kelber’s team validated their breakthrough method by evaluating how different biomarker genes are expressed in cancer cells when they are grown in different environments. Hoffman explained that this study reaffirms his laboratory’s previous work demonstrating the importance studying human cancer cells in the orthotopic environment.

“Jonathan looks at genes and how they are expressed at the subcutaneous versus the orthotopic levels,” he said. “[The results are] very different. Very, very different. Jonathan developed a new and better technique — it’s revolutionary! There’s millions — tens of millions of these FFPE samples sitting in drawers all over the world. Just one application of his technique is looking at tumors orthotopically and finding a remarkable difference.”

Adamian explained the low survival rate for pancreatic cancer patients is due in part to the difficulty of identifying biomarkers to make early diagnoses.

“Pancreatic cancer is currently at a 7 percent survival rate. We thought we really needed a breakthrough for this cancer,” she said. “We think this [method] could really help to identify new biomarkers.”

Hoover, who began working on developing these novel mH-based methods as an undergraduate at CSUN, said the new technique will pave the way for better genome and RNA sequencing of patient tissue — a potentially life-changing feat for pancreatic cancer research.

“We see that when we use the microHomogenizerTM method, the gene profile is more similar to fresh tissue samples,” she said. “I just can’t wait for [this project] to continue so we can identify new biomarkers and how gene signatures are changing between patients!”

Claremont BioSolutions’ President and co-founder Dr. Robert Doebler, said the tool’s success is something to be lauded.

“We are honored to be involved in the success achieved by the Kelber Lab in demonstrating a unique method for RNA extraction from challenging FFPE tissue samples utilizing our microHomogenizer™ device,” he said. “We feel that this protocol has the potential to fill a significant need in cancer-related research and clinical oncology.”

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