Experimental design considerations for studies of human tear proteins. 2023

Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA.

Human tears contain abundant, diverse sets of proteins that may serve as biomarkers of ocular surface health. There is a need for reproducible methods that consider multiple factors influencing the tear proteome, in addition to the variable of interest. Here we examined a workflow for proteomic analysis of tear proteins without the need to pool tear samples from multiple individuals, thus allowing for analyses based on individual factors, and increasing opportunities for protein biomarker discovery. Tears were collected by Schirmer strip following topical ocular anesthetic application then individually stored at -80 °C prior to processing for proteomics. Tear proteins were extracted from Schirmer strips, digested using suspension trapping spin columns (S-Trap), and labeled with high multiplicity tandem mass tags (TMT). Peptide digests were then extensively fractionated by two-dimensional chromatography and analyzed by mass spectrometry to identify and measure changes in protein abundance in each sample. Analysis of select samples was performed to test protocols and to compare the impact of clinically relevant parameters. To facilitate comparison of separate TMT experiments, common pool samples were included in each TMT instrument run and internal reference scaling (IRS) was performed. Differences in subsets of tear proteins were noted for: geographic site of tear collection, contact lens use, and differences in tear fluid volume among individuals. These findings demonstrate that proteomic analysis of human tear proteins can be performed without the need to pool samples, and that development of analytic workflows must consider factors that may affect outcomes in studies focused on diverse clinical samples.

UI MeSH Term Description Entries
D012107 Research Design A plan for collecting and utilizing data so that desired information can be obtained with sufficient precision or so that an hypothesis can be tested properly. Experimental Design,Data Adjustment,Data Reporting,Design, Experimental,Designs, Experimental,Error Sources,Experimental Designs,Matched Groups,Methodology, Research,Problem Formulation,Research Methodology,Research Proposal,Research Strategy,Research Technics,Research Techniques,Scoring Methods,Adjustment, Data,Adjustments, Data,Data Adjustments,Design, Research,Designs, Research,Error Source,Formulation, Problem,Formulations, Problem,Group, Matched,Groups, Matched,Matched Group,Method, Scoring,Methods, Scoring,Problem Formulations,Proposal, Research,Proposals, Research,Reporting, Data,Research Designs,Research Proposals,Research Strategies,Research Technic,Research Technique,Scoring Method,Source, Error,Sources, Error,Strategies, Research,Strategy, Research,Technic, Research,Technics, Research,Technique, Research,Techniques, Research
D005136 Eye Proteins PROTEINS derived from TISSUES of the EYE. Proteins, Eye
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013666 Tears The fluid secreted by the lacrimal glands. This fluid moistens the CONJUNCTIVA and CORNEA. Meibomian Lipids,Meibum,Lipid, Meibomian,Meibomian Lipid,Tear
D040901 Proteomics The systematic study of the complete complement of proteins (PROTEOME) of organisms. Peptidomics

Related Publications

Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
July 1983, Nippon Ganka Gakkai zasshi,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
January 1985, Environmental mutagenesis,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
July 2016, Clinical & translational immunology,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
January 2019, The Journal of neuroscience : the official journal of the Society for Neuroscience,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
August 1975, Archives of environmental health,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
November 1979, Experimental eye research,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
January 2023, Methods in molecular biology (Clifton, N.J.),
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
April 2002, American journal of epidemiology,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
December 2016, Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive Neurology,
Brooke M Harkness, and Deborah M Hegarty, and Julie A Saugstad, and Hannah Behrens, and Jason Betz, and Larry L David, and Jodi A Lapidus, and Siting Chen, and Richard Stutzman, and Winston Chamberlain, and Maricarmen Perez-Blanco, and Anat Galor, and Sue A Aicher
January 2020, Neurosurgery,
Copied contents to your clipboard!