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Surface-Micromachined Microfiltration Membranes for Efficient Isolation and Functional Immunophenotyping of Subpopulations of Immune Cells
Advanced Healthcare Materials (2013)
  • Weiqiang Chen, University of Michigan - Ann Arbor
  • Nien-Tsu Huang, University of Michigan - Ann Arbor
  • Boram Oh, University of Michigan - Ann Arbor
  • Raymond H. W. Lam, City University of Hong Kong
  • Rong Fan, Yale University
  • Timothy T. Cornell, University of Michigan - Ann Arbor
  • Thomas P. Shanley, University of Michigan - Ann Arbor
  • Katsuo Kurabayashi, University of Michigan - Ann Arbor
  • Jianping Fu, University of Michigan - Ann Arbor
Abstract
An accurate measurement of the immune status in patients with immune system disorders is critical in evaluating the stage of diseases and tailoring drug treatments. The functional cellular immunity test is a promising method to establish the diagnosis of immune dysfunctions. The conventional functional cellular immunity test involves measurements of the capacity of peripheral blood mononuclear cells to produce pro-inflammatory cytokines when stimulated ex vivo. However, this “bulk” assay measures the overall reactivity of a population of lymphocytes and monocytes, making it difficult to pinpoint the phenotype or real identity of the reactive immune cells involved. In this research, we develop a large surface micromachined polydimethylsiloxane (PDMS) microfiltration membrane (PMM) with high porosity, which is integrated in a microfluidic microfiltration platform. Using the PMM with functionalized microbeads conjugated with antibodies against specific cell surface proteins, we demonstrated rapid, effi cient and high-throughput on-chip isolation, enrichment, and stimulation of subpopulations of immune cells from blood specimens. Furthermore, the PMM-integrated microfiltration platform, coupled with a no-wash homogeneous chemiluminescence assay (“AlphaLISA”), enables us to demonstrate rapid and sensitive on-chip immunophenotyping assays for subpopulations of immune cells isolated directly from minute quantities of blood samples.
Publication Date
Winter January 1, 2013
Citation Information
Weiqiang Chen, Nien-Tsu Huang, Boram Oh, Raymond H. W. Lam, et al.. "Surface-Micromachined Microfiltration Membranes for Efficient Isolation and Functional Immunophenotyping of Subpopulations of Immune Cells" Advanced Healthcare Materials (2013)
Available at: http://works.bepress.com/weiqiang_chen/5/