Circulating markers from blood represents an exciting in vitro diagnostic scenario because of the minimally invasive nature of securing these markers and the plethora of marker types found in blood, such as biological cells, cell-free molecules (proteins and cell-free DNA) and vesicles (nanometer assemblies such as exosomes). Unfortunately, many of these blood-borne markers have not been effectively utilized in clinical practice to manage challenging diseases such as cancer, infectious diseases and stroke to name a few. This deficiency has arisen primarily from the fact that disease-associated blood markers are a vast minority in a mixed population making them difficult to find and analyze due to the lack of efficient platforms for their isolation and systems that can determine the molecularstructural variations they may harbor. To address this pressing need, a new Biotechnology Resource Center is proposed (CBM2), which consists of a highly accomplished and multidisciplinary team that will generate innovative systems for the selection of circulating markers from whole blood and process disease-specific molecular signatures. The envisioned system takes advantage of multiple length scales (mm-to-nm) to affect unique processing capabilities offered by the system. The system will process whole blood (=1 mL) and concentrate clinically relevant markers to nL volumes (>106 enrichment factor) and search for a variety of sequence variations from both DNA and RNA molecules using a solid-phase ligase detection reaction (spLDR) carried out on millions of polymer pillars fabricated in a single step using replication-based technologies. spLDR products are electrokinetically swept into nanometer flight tubes with their identification based on molecular-dependent electrophoretic mobilities; single-molecule processing will be carried out using nanometer flight tubes with detection performed non-optically. The system will provide the ability to select all clinically relevant markers (cells, cell-free DNA and exosomes) from a single blood draw and secure pertinent information from those markers in a fully automated fashion to allow transitioning the platform into clinical practice. The research will be facilitated by extensive infrastructure alreay in place and an aggressive Collaborative and Service Project Center portfolio. Novel technology dissemination and training to the biomedical community will be facilitated through compelling workshops offered by CBM2 and the members' extensive networks.
The Biotechnology Resource Center of Biomodular Multi-scale Systems (CBM2) for Precision Molecular Diagnostics will develop a variety of technology platforms for disease management. The technology platforms will possess unique and compelling operating characteristics that will provide diagnostic information obtained from circulating markers found in blood; such as biological cells; exosomes and cell free DNA. Single-molecule processing in a highly multiplexed format with non-optical readout will provide disease-specific signatures to help guide clinical decisions.
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