New microchip technology for medical imaging biomarkers of disease

December 16, 2005 think pad

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A collaboration between scientists at UCLA, Caltech, Stanford, Siemens and Fluidigm have developed a new technology using integrated microfluidics chips for simplifying, lowering the cost and diversifying the types of molecules used to image the biology of disease with the medical imaging technology, Positron Emission Tomography (PET). These molecules are used with PET to diagnostically search throughout the body to look for (image) the molecular errors of disease and to guide the development of new molecular therapeutics.

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PET is a new generation of medical imaging for examining the biology of disease that has been shown to dramatically improve the detection of cancer, stage the extent of cancer throughout the body, detect recurrence of cancer and to help select the right therapy for individual patients.

by Charles Fulton 01 There's a new type of projector in town that attaches to video and computer sources, thanks to advances in image output technology.

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In Alzheimer's disease, PET has been shown to have a 93% accuracy in detecting Alzheimer's about three years before the conventional diagnosis of "Probable Alzheimer's", when integrated into the clinical workup of patients. In addition, PET has been shown to detect Alzheimer's and other neurological disease years before even symptoms are expressed. PET is also employed to determine which patients with cardiovascular disease will benefit from bypass surgery and angioplasty. desktop
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These and other clinical uses of PET employ a labeled version of the sugar glucose, called Fluorodeoxyglucose (FDG). Glucose is a critical fuel for cells throughout the body to perform their normal functions. For example, 95% of the energy for the brain to function comes from glucose. In addition, cancer cells increase their metabolism of glucose about 25 fold. There were about three million clinical PET studies performed in clinical services throughout the world in 2005. refurbished laptops
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Published this week in the journal Science, scientists demonstrated a new technology of a programmable chip that can dramatically accelerate the development of many new molecular imaging molecules for PET. As a proof of principle, this group of academic and commercial scientists demonstrated that FDG could be synthesized on a "stamp-size" chip. These chips have a design similar to integrated electronic circuits, except they are made up of fluid channels, chambers and values (switches) that can carry out many chemical operations to synthesize and label molecules for PET imaging. All the operations of the chip are controlled and executed by a PC. lap top
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FDG was produced on the chip and used to image glucose metabolism in a mouse with a specially designed PET scanner for mice produced by Siemens, called a microPET. The Science paper also illustrated that this technology can also produce the amount of FDG required for human studies. More importantly, the paper illustrates a new base technology for producing and delivering a diverse array of molecular imaging molecules and labeled drugs for use with PET to examine the biology of many diseases for molecular diagnostics and to guide the development of new molecular therapeutics (drugs). memory
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"Chemists synthesize molecules in a lab by mixing chemicals in beakers and repeating experiments many times, but one day soon they'll sit at a PC and carry out chemical synthesis with the digital control, speed and flexibility of today's world of electronics using a tiny integrated microfluidic chip," said Hsian-Rong Tseng, Ph.D, assistant professor of molecular and medical pharmacology, Crump Institute for Molecular Imaging, David Geffen School of Medicine at UCLA. as400
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There is a vast distribution of manufacturing sites throughout the world producing PET molecular imaging molecules for hospitals, universities and pharmaceutical companies. The goal is to integrate these new chips into a small control device operated by a PC that will be commercially produced. Then to ship chips to users so they can produce whatever molecules they choose for molecular imaging with PET. These chips will be an enabling technology to fuel growth in the number and diversity of imaging molecules and applications of PET in biology and pharmaceutical research and in the care of patients. hardware

University of California-Los Angeles