Gene expression biomarkers

A measurement of gene expression that indicates some biological condition is taking place. A gene is a part of a chromosome (also known as a DNA molecule) that can be “expressed” or “turned on” or “turned off”. When a gene is turned on or turned off, an organism exhibits a trait, such as hair color or the ability to digest a type or food, etc. Whether a gene is turned on or turned off (expressed) can be measured in the laboratory. Biomarkers are measurable indicators of a biological condition. Often scientists use gene expression biomarkers to determine what an organism or cell is doing (growing, making a protein or some other action). BioTime’s subsidiary Oncocyte Corporation is using such gene expression in diagnostic products for the detection of different types of cancer.