Multiplex Detection of Cell Surface Markers using Plasmonic Sensors
Breast cancer has the highest incidence among women in the western world affecting up to 10% of women and therefore is among today’s most pressing health concerns.1 Despite improvements in diagnosis and treatment, the effect on mortality has been modest. Recent studies of breast cancer have identified a subpopulation (CD44+/CD24-) of breast cancer cells that demonstrated CSC properties.2 A direct relationship between progenitor states and invasive capacity of cancer cells (invasion being the first step in the metastasis cascade) was also established via flow cytometry analysis of various breast cancer cell lines for CD44 and CD24 phenotype and subsequent analysis of CD44+/CD24- (progenitors) and CD44-/CD24+ (non-progenitors) cells for invasion and metastasis using matrigel and xenograft models. It has been reported that five among 13 breast cancer cell lines (MDA-MB-231, MDA-MB-436, Hs578T, SUM1315, and HBL-100) contained a higher percentage (>30%) of CD44+/CD24- cells.3 Hence, identification of cells of CD44+/CD24- immunophenotype within a population of tumor cells may have great value in terms of predicting the invasiveness and metastasis potential of the tumor. We report a procedure to fabricate gold nanorod molecular probes (GNrMP) and deploy these structures for multiplex detection(4-7) 10064.
Their team has developed a range of spectroscopic and biosensor technologies for disease diagnostics and food security monitoring. Tracking protein interactions and monitoring and detecting the dynamic state of single molecule events in cells is addressed through techniques such as Fluorescence Correlation Spectroscopy, FRET, Fluorescence lifetime imaging, enhanced single cell Raman spectroscopy , Plasmonic sensing, and Optical Trap.
He has published over 130 refereed research articles in areas covering thermodynamics and viscoelactic modeling of biological systems, spectroscopic methods, bio and nanomaterial sensors, and is a member of American Chemical Society, Institute of Biological Engineering, Biophysical Society, and American Association for Clinical Chemistry.
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Centre for Cellular and Molecular Biology, Hyderabad, India