title: Enhanced multiplexing in mass cytometry using osmium and ruthenium tetroxide species.
abstract: Mass cytometry facilitates high-dimensional, quantitative, single-cell analysis. The method for sample multiplexing in mass cytometry, called mass-tag cellular barcoding (MCB), relies on the covalent reaction of bifunctional metal chelators with intracellular proteins. Here, we describe the use of osmium and ruthenium tetroxides (OsO4 and RuO4 ) that bind covalently with fatty acids in the cellular membranes and aromatic amino acids in proteins. Both OsO4 and RuO4 rapidly reacted and allowed for MCB with live cells, crosslinked cells, and permeabilized cells. Given the covalent nature of the labeling reaction, isotope leaching was not observed. OsO4 and RuO4 were used in a 20-sample barcoding protocol together with palladium isotopes. As mass channels occupied by osmium and ruthenium are not used for antibody detection the number of masses effectively utilized in a single experiment is expanded. OsO4 and RuO4 can therefore be used as MCB reagents for a wide range of mass cytometry workflows. © 2016 International Society for Advancement of Cytometry.
authors.affiliation: Institute of Molecular Life Sciences (IMLS), University of Zürich, Zürich, Switzerland.
authors.forename: Raúl
authors.initials: R
authors.lastname: Catena
authors.affiliation: Institute of Molecular Life Sciences (IMLS), University of Zürich, Zürich, Switzerland.|Department of Biology, Biology Master's Program, ETH, Zürich, Switzerland.
authors.forename: Alaz
authors.initials: A
authors.lastname: Özcan
authors.affiliation: Institute of Molecular Life Sciences (IMLS), University of Zürich, Zürich, Switzerland.
authors.forename: Nevena
authors.initials: N
authors.lastname: Zivanovic
authors.affiliation: Institute of Molecular Life Sciences (IMLS), University of Zürich, Zürich, Switzerland.
authors.forename: Bernd
authors.initials: B
authors.lastname: Bodenmiller
mesh_terms: D000596:Amino Acids / Q000737:chemistry; D000911:Antibodies, Monoclonal / Q000737:chemistry; D015703:Antigens, CD / Q000032:analysis; D045744:Cell Line, Tumor; D002614:Chelating Agents / Q000737:chemistry; D003592:Cytophotometry / Q000295:instrumentation / Q000379:methods*; D005227:Fatty Acids / Q000737:chemistry; D006573:Heterocyclic Compounds, 1-Ring / Q000737:chemistry; D006801:Humans; D019169:Jurkat Cells; D007963:Leukocytes, Mononuclear / Q000145:classification / Q000166:cytology; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D009993:Osmium Tetroxide / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D017975:Ruthenium Compounds / Q000737:chemistry*; D059010:Single-Cell Analysis / Q000295:instrumentation / Q000379:methods*; D013194:Staining and Labeling / Q000379:methods*
chemical_list: D000596:Amino Acids; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D002614:Chelating Agents; D005227:Fatty Acids; D006573:Heterocyclic Compounds, 1-Ring; D017975:Ruthenium Compounds; C071349:1,4,7,10-tetraazacyclododecane- 1,4,7,10-tetraacetic acid; D010165:Palladium; C027646:ruthenium tetraoxide; D009993:Osmium Tetroxide
keywords: CyTOF; mass cytometry; mass tag cellular barcoding; osmium tetroxide; ruthenium tetroxide