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Eric Brouzes

T(office): 631.632.1852
T(lab): 631.632.1735

F: 631.632.8577
E:

Office:

Biomedical Engineering
Bioengineering building- Room G05
Stony Brook, NY
11794-5281

Eric Brouzes

Research Focus

Analyzing heterogeneity of cancer tissues- It is increasingly appreciated that cells within a population, even derived from a common ancestor, exhibit a high degree of heterogeneity. Cell subpopulations generally arise from genetic mutations, epigenetic modifications or stochastic gene expression. This heterogeneity underlines the importance of single-cell approaches that permits the analysis of correlations that are otherwise obscured with techniques that collect the average cellular response. The analysis of population heterogeneity is particularly relevant to certain pathologies like cancer. Cancer development is generally described as an evolutionary process where a cell population randomly acquires mutations and natural selection acts on the resultant phenotypic diversity. This view has been recently challenged by the description of stochastic gene expression that can induce transitions between distinct phenotypes without genetic mutations. Hence, non-genetic phenotypic variations may play a more prominent role in disease than previously anticipated. Finally, cell phenotypes could be stabilized by cellular interactions, and the loss of these interactions could trigger stochastic gene expression and tumorigenesis. These different models that try to reconcile the different data accumulated from a few decades of molecular biology studies stress the importance of combining high-throughput single-cell techniques with system biology approaches for studying cancer.
My research exploits the advantages conferred by droplet microfluidics over conventional technologies and other microfluidics techniques in terms of automation, throughput and combinatorial power for the manipulation and analysis of single-cells. We are combining droplet microfluidics and state-of-the-art molecular techniques like next-generation sequencing to conduct the genomic profiling of tissues at single-cell resolution. This multidisciplinary project will have a direct impact on the basic science of cancer, and at the clinical level by improving the way cancer progression is assessed and monitored.

 

Droplet microfluidics- Droplet microfluidics uses a 2-phase system, in which each assay is compartmentalized in an aqueous microdroplet (1 pL to 10 nL) surrounded by an immiscible oil. We generate droplets by forcing a central aqueous phase and two side streams of fluorinated oil through a small orifice (nozzle) (Figure A). The outer fluid exerts pressure and viscous stresses that force the inner fluid into a narrow thread, which then breaks inside or downstream of the orifice into droplets. The droplets are all of the same size (monodisperse) and are stabilized by a fluorosurfactant contained in the fluorinated oil (Figure B). Droplets can be generated at up to 5,000 per second.

The droplet format has several advantages compared to single phase microfluidics: 1- it provides physical and chemical isolation eliminating the risk of cross-contamination, 2- reagents are quickly and efficiently mixed inside droplets; 3- droplets are very stable and can be incubated or thermocycled off-chip before being re-injected; 4- droplets can be manipulated at very high throughput. Droplet manipulations include pair-wise merging by electro-coalescence (Figure C), mixing (Figure D), on-chip incubation (Figure E), fluorescence detection (Figure F) and fluorescence-activated sorting (Figure G). Finally, droplet microfluidics presents a new paradigm for single-cell analysis. Experimentally, microfluidic chips are made of PDMS using soft-lithography techniques and flows are controlled by a pressure-driven system.

 

Education

  • Postdoctoral- Genetics, Genetics Department, Harvard Medical School (Adviser: Norbert Perrimon), 2004-2006
  • Ph.D- Interface Physics-Biology, Universite Denis Diderot- Paris7, Institut CURIE, 1998-2004
  • M.Sc.- Interface Physics-Biology, Universite Denis Diderot- Paris7, Paris, 1998
  • Engineer- Physics,Ecole Superieure de Physique et Chimie de la Ville de Paris (ESPCI-ParisTECH), Paris, 1994-1998

Research and Professional Experience

  • 2011-Present Research Assistant Professor, Dept. of Biomedical Engineering, SUNY at Stony Brook
  • 2010 Consultant, Metagenomix, Branford, CT
  • 2006-2009 Senior Scientist, Raindance Technologies, Lexington, MA
  • 2004-2006 Postdoctoral Fellow, Genetics Department, Harvard Medical School

Publications

Contribution to Book

  • Brouzes E, “Droplet based analysis of single cells”, Book Chapter of “Single-cell analyses” in the series Methods in Molecular Biology, published by Humana Press, USA. Under press.

Peer Reviewed Journal Papers

  • Brouzes E, Medkova M, Savenelli N, Marran D, Twardowski M, Hutchison JB, Rothberg JM, Link DR, Perrimon N, Samuels ML, “Droplet microfluidic technology for single-cell high-throughput screening.“, PNAS. 2009; 106(34):14195-200.
  • Frenz L, Blank K, Brouzes E, Griffiths AD, “Reliable microfluidic on-chip incubation of droplets in delay-lines“, Lab on a Chip. 2009; 9(10):1344-8.
  • Joensson HN, Samuels ML, Brouzes ER, Medkova M, Uhlén M, Link DR, Andersson-Svahn H, “Detection and analysis of cell surface biomarkers expressed at extremely low levels using enzymatic amplification in microfluidic droplets”, Angewandte Chemie Int Ed Engl. 2009;48(14):2518-21.
  • Supatto W, Débarre D, Moulia B, Brouzes E, Martin JL, Farge E, Beaurepaire E, “in-vivo modulation of morphogenetic movements in Drosophila embryos with femtosecond laser pulses”, PNAS. 2005; 102(4):1047-52.
  • Brouzes E, Supatto W, Farge E, "Is Mechano-Sensitive Expression of Twist Involved In Mesoderm Formation?" Bio Cell. 2004; 96(7): 471-7.
  • Brouzes E, Farge E, "Interplay of mechanical deformation and patterned gene expression in developing embryos." Curr Opin Genet Dev. 2004; 14(4): 367-74.

Selected talks

  • Brouzes E, Branciforte J, Twardowski M, Marran D, Suo Y, Charles Y, Boitard L, Weiner M, Rothberg J, Perrimon N, Link D, “Droplet-based High-Throughput Live/Dead Cell Assay”, MicroTAS 2006, Tokyo (Japan).
  • Brouzes E, Supatto W, Farge E, "Morphotransduction during ventral furrow formation in Drosophila Melanogaster Embryo", Workshop and Seminar : "Motion, sensation and self-organization in living cells", 20th-31st of October 2003, Dresden (Germany).

Selected proceedings

  • Medkova M, Brouzes E, Dahan E, Kotsopoulos S, Warner J, Larson J, Olsen J, Link D, and Samuels M, “Analyzing Cancer at Single Cell Resolution with Droplet Technology”, AACR 2010, Washington (USA).
  • Medkova M, Dahan E, Brouzes E, Larson J, Link D, Samuels M, “Sorting single cells using microdroplet technology”, ISAC 2010, Seattle (USA).
    Brouzes E, Medkova M, Savenelli N, Marran D, Twardowski M, Hutchison JB, Rothberg JM, Link DR, Perrimon N, Samuels ML, ”Droplet microfluidic technology for single-cell high-throughput screening”, 48th annual meeting of the American Society for Cell Biology, 13th-17th December 2008, San Francisco (USA).
  • Joensson H, Brouzes E, Samuels M, Uhlen M, Andersson Svahn H, Link D, “Biomarker detection by enzymatic amplification in droplets- towards high-throughput detection of low copy number cell surface biomarkers”, MicroTAS 2007, Paris (France).
    Supatto W, Brouzes E, Perrimon N, Fraser S, “Statistical analysis of cell movements during Drosophila embryo morphogenesis.”, Biophysical Society, 52nd Annual Meeting, 2-6 February 2008, Long Beach (USA).
  • Brouzes E, Supatto W, Beaurepaire E, Farge E, “Mechanical Induction of the twist Developmental Gene at Early Drosophila Embryo Gastrulation”, Archives of Physiology and Biochemistry, (2004) S112:4.

Patent

  • Blank K. G., Brouzes E., Frenz L., Griffiths A. D., “Microfluidic device for on-chip incubation of droplets in delay lines for droplet-based microfluidic assays, comprises a delay line allowing incubation of droplets flowing in carrier oil, and droplet fusion module in upstream of delay line.”, EU Patent Application # WO2010042744, filed on October 8, 2009 ; Rights owned by University of Strasbourg.

Course

  • BME 381- Nanofabrication in Biomedical Applications, Spring 2012

Funding Agencies

  • National Institutes of Health- NHGRI
  • Center for Biotechnology (New York State center for advanced technology)