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We have demonstrated the use of the Opto-Fluidic ring resonator (OFRR) to achieve the label-free detection of CD4+
and CD8+ T-Lymphocytes. The OFRR sensing technology combines microfluidics and optical sensing in a small
platform that achieves rapid detection. In this work, white blood cells were obtained from healthy blood and the
concentration altered to reflect CD4 and CD8 concentrations of HIV infected individuals. The OFRR was modified to
effectively capture these receptors located on T-Lymphocytes and obtain a sensing signal through interaction with an
evanescent field. Results show isolation of CD4+ and CD8+ T-Lymphocytes at medically significant levels. This work
will lead to a device that can provide a CD4 and CD8 count to measure HIV progression in a low cost sensing setup.
John T. Gohring andXudong Fan
"Detection of CD4+ and CD8 + T-lymphocytes with the optofluidic
ring resonator (OFRR) biosensor", Proc. SPIE 7322, Photonic Microdevices/Microstructures for Sensing, 73220D (29 April 2009); https://doi.org/10.1117/12.818255
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John T. Gohring, Xudong Fan, "Detection of CD4+ and CD8 + T-lymphocytes with the optofluidic ring resonator (OFRR) biosensor," Proc. SPIE 7322, Photonic Microdevices/Microstructures for Sensing, 73220D (29 April 2009); https://doi.org/10.1117/12.818255