Title: Benchtop-compatible sample processing workflow for proteome profiling of < 100 mammalian cells

Journal Article · · Analytical and Bioanalytical Chemistry
 [1];  [2]; ORCiD logo [3];  [1];  [1];  [1];  [3];  [3]; ORCiD logo [1]; ORCiD logo [4]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
  2. Brigham Young Univ., Provo, UT (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL); Brigham Young Univ., Provo, UT (United States)

Extending proteomics to smaller samples can enable the mapping of protein expression across tissues with high spatial resolution and can reveal sub-group heterogeneity. However, despite the continually improving sensitivity of LC-MS instrumentation, in-depth profiling of samples containing low-nanogram amounts of protein has remained challenging due to analyte losses incurred during preparation and analysis. To address this, we recently developed nanodroplet processing in one pot for trace samples (nanoPOTS), a robotic/microfluidic platform that generates ready-to-analyze peptides from cellular material in ~200 nL droplets with greatly reduced sample losses. In combination with ultrasensitive LC-MS, nanoPOTS has enabled >3000 proteins to be confidently identified from as few as 10 cultured human cells and ~700 proteins from single cells. However, the nanoPOTS platform requires a highly skilled operator and a costly in-house-built robotic nanopipetting instrument. In this work, we sought to evaluate the extent to which the benefits of nanodroplet processing could be preserved when upscaling reagent dispensing volumes by a factor of 10 to those addressable by commercial micropipette. We characterized the resulting platform, termed microdroplet processing in one pot for trace samples (µPOTS), for the analysis of as few as ~25 cultured HeLa cells (4 ng total protein) or 50 µm square mouse liver tissue thin sections and found that ~1800 and ~1200 unique proteins were respectively identified with high reproducibility. As such, the reduced equipment requirements should facilitate broad dissemination of nanoproteomics workflows by obviating the need for a capital-intensive custom liquid handling system.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1701722
Report Number(s):
PNNL-SA-146641
Journal Information:
Analytical and Bioanalytical Chemistry, Journal Name: Analytical and Bioanalytical Chemistry Journal Issue: 19 Vol. 411; ISSN 1618-2642
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

Ultrasensitive and Fast Bottom-up Analysis of Femtogram Amounts of Complex Proteome Digests journal October 2013
Proteomic Analysis of Single Mammalian Cells Enabled by Microfluidic Nanodroplet Sample Preparation and Ultrasensitive NanoLC-MS journal June 2018
Ultrasensitive and Fast Bottom-up Analysis of Femtogram Amounts of Complex Proteome Digests journal October 2013
Proteomic Analysis of Single Mammalian Cells Enabled by Microfluidic Nanodroplet Sample Preparation and Ultrasensitive NanoLC-MS journal June 2018
Longitudinal Assessment of Peptide Recoveries from a Sample Solution in an Autosampler Vial for Proteomics journal January 2015
Comprehensive and quantitative proteome profiling of the mouse liver and plasma journal February 2008
The challenge of the proteome dynamic range and its implications for in-depth proteomics journal March 2013
Spatially-resolved protein surface microsampling from tissue sections using liquid extraction surface analysis journal April 2016
Protein identification in imaging mass spectrometry through spatially targeted liquid micro-extractions journal February 2018
From genomics to proteomics journal July 2000
Maximizing recovery of water-soluble proteins through acetone precipitation journal September 2013
Droplet Barcoding for Single-Cell Transcriptomics Applied to Embryonic Stem Cells journal May 2015
Highly Parallel Genome-wide Expression Profiling of Individual Cells Using Nanoliter Droplets journal May 2015
Multidimensional LC–MS/MS analysis of liver proteins in rat, mouse and human microsomal and S9 fractions journal March 2015
Protein identification in mass-spectrometry imaging journal November 2012
Ultrasensitive Proteomics Using High-Efficiency On-Line Micro-SPE-NanoLC-NanoESI MS and MS/MS journal January 2004
Integrated Microscale Analysis System for Targeted Liquid Chromatography Mass Spectrometry Proteomics on Limited Amounts of Enriched Cell Populations journal October 2013
Comparisons of Mass Spectrometry Compatible Surfactants for Global Analysis of the Mammalian Brain Proteome journal November 2008
Development of Mass Spectrometry-Based Shotgun Method for Proteome Analysis of 500 to 5000 Cancer Cells journal March 2010
Single Cell Proteomics Using Frog ( Xenopus laevis ) Blastomeres Isolated from Early Stage Embryos, Which Form a Geometric Progression in Protein Content journal June 2016
Enhanced Spatially Resolved Proteomics Using On-Tissue Hydrogel-Mediated Protein Digestion journal February 2017
Evaluation of FASP, SP3, and iST Protocols for Proteomic Sample Preparation in the Low Microgram Range journal October 2017
Ultrasensitive and Quantitative Analyses from Combined Separations−Mass Spectrometry for the Characterization of Proteomes journal April 2004
Coupling a Detergent Lysis/Cleanup Methodology with Intact Protein Fractionation for Enhanced Proteome Characterization journal October 2012
Gene Ontology: tool for the unification of biology journal May 2000
From genomics to proteomics journal March 2003
Isolation of rare circulating tumour cells in cancer patients by microchip technology journal December 2007
Universal sample preparation method for proteome analysis journal April 2009
Mass spectrometry of intact membrane protein complexes journal March 2013
The MaxQuant computational platform for mass spectrometry-based shotgun proteomics journal October 2016
Nanodroplet processing platform for deep and quantitative proteome profiling of 10–100 mammalian cells journal February 2018
Spatial proteomics: a powerful discovery tool for cell biology journal January 2019
Synovial cell cross-talk with cartilage plays a major role in the pathogenesis of osteoarthritis journal July 2020
Spatially-Resolved Proteomics: Rapid Quantitative Analysis of Laser Capture Microdissected Alveolar Tissue Samples journal December 2016
Ultrasensitive nanoelectrospray ionization-mass spectrometry using poly(dimethylsiloxane) microchips with monolithically integrated emitters journal January 2010
A “Proteomic Ruler” for Protein Copy Number and Concentration Estimation without Spike-in Standards journal September 2014
An Integrated Platform for Isolation, Processing, and Mass Spectrometry-based Proteomic Profiling of Rare Cells in Whole Blood journal March 2015
Less is More: Membrane Protein Digestion Beyond Urea–Trypsin Solution for Next-level Proteomics journal June 2015
Spatially Resolved Proteome Mapping of Laser Capture Microdissected Tissue with Automated Sample Transfer to Nanodroplets journal June 2018
Expansion of the Gene Ontology knowledgebase and resources journal November 2016
Single-Cell Mass Cytometry of Differential Immune and Drug Responses Across a Human Hematopoietic Continuum journal May 2011
An update on the mouse liver proteome journal January 2009
Critical comparison of sample preparation strategies for shotgun proteomic analysis of formalin-fixed, paraffin-embedded samples: insights from liver tissue journal January 2014
SNaPP: Simplified Nanoproteomics Platform for Reproducible Global Proteomic Analysis of Nanogram Protein Quantities journal March 2016
Ultrasensitive proteome analysis using paramagnetic bead technology journal October 2014
Expansion of the Gene Ontology knowledgebase and resources text January 2017
Global Cell Proteome Profiling, Phospho-signaling and Quantitative Proteomics for Identification of New Biomarkers in Acute Myeloid Leukemia Patients journal October 2015
Proteomic Challenges: Sample Preparation Techniques for Microgram-Quantity Protein Analysis from Biological Samples journal February 2015

Cited By (3)

Automated mass spectrometry imaging of over 2000 proteins from tissue sections at 100-μm spatial resolution journal January 2020
Automated mass spectrometry imaging of over 2000 proteins from tissue sections at 100-μm spatial resolution journal January 2020
New mass spectrometry technologies contributing towards comprehensive and high throughput omics analyses of single cells journal January 2019