Monday 22 December, 2014

New protein analysis technique may help in early diagnosis of lung cancer

Published On: Fri, Dec 3rd, 2010 | Lung Cancer | By BioNews

SomaLogic researchers have described a new approach that may help in early detection of lung cancer.

“Personalized medicine has to be more than prediction of risk for disease, it has to be actionable; what is the person”s state of health at this moment? To determine that you have to understand what proteins are being made, and at what concentrations, even at very low levels,” said Larry Gold, Founder, Chairman and CEO of SomaLogic.

“This has proven to be a difficult task, but we believe we have succeeded at finding a way to entirely transform protein-based diagnostics and help drive the realization of personalized medicine in this decade.”

SomaLogic”s proteomic technology is built on two decades of painstaking work to corral aptamers – short stretches of nucleic acids that form protein-binding three-dimensional structures – into performing exquisitely specific recognition and binding of proteins.

Through a series of chemical modifications of the nucleic acids that make up the aptamer, SomaLogic scientists were able to develop a next generation of aptamers – renamed “SOMAmers” to reflect their increased abilities — that together can bind proteins of widely diverse types and concentrations.

And because SOMAmers are essentially small bits of DNA, current DNA measurement technologies like microarrays can be used to measure them and provide a readout of protein or biomarker types and concentrations in a fast and simple analysis. This powerful combination – specific binding to individual proteins and DNA-based quantification – allows the researchers to accurately detect and measure literally a thousand proteins in as little as a few drops of blood in a single experiment.

“Today, single protein biomarkers are the foundation of clinical diagnostics: but both normal and disease biology is far more complex than a single measurement can capture: We need to look at multiple biomarkers, or a ”signature” of proteins, that is truly revealing about health and disease at that moment,” said Steve Williams, Chief Medical Officer of SomaLogic.

SomaLogic researchers also described the application of SOMAmers at large scale, uncovering a panel of biomarkers that announce the presence of lung cancer.

“By being able to detect lung cancer early, we finally have a tool to reduce the morbidity and mortality of this deadly disease with successful surgical intervention,” said William Rom, of the New York University.

“In addition, we can avoid unnecessary treatments in patients who have a lung nodule on CT scan, but which is actually not cancer as revealed by this test,” said Rom

The findings appeared in the journal PLoS One (ANI)

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