Srikanth Singamaneni, PhD, assistant professor of engineering, along with Evan Kharasch, MD, PhD, and Jerry Morrissey, PhD, at Washington University School of Medicine, have developed a biomedical sensor using gold nanorods designed to detect the elevation of the protein neutrophil gelatinase-associated lipocalin (NGAL), a promising biomarker for acute kidney injury, in urine. Biomarkers are typically small molecules or proteins in the body whose concentration changes in response to disease or therapy.