Back to Search
Start Over
Tantalum Oxide Nanoparticle-Based Mass Tag for Mass Cytometry.
- Source :
-
Analytical chemistry [Anal Chem] 2020 Apr 21; Vol. 92 (8), pp. 5741-5749. Date of Electronic Publication: 2020 Apr 02. - Publication Year :
- 2020
-
Abstract
- Mass cytometry (MC) is a bioanalytical technique that uses metal-tagged antibodies (Abs) for high-dimensional single-cell immunoassays. Currently, this technology can measure over 40 parameters simultaneously on individual cells using metal-chelating polymer (MCP) based reagents. However, MC can in principle detect up to 135 parameters with the development of new elemental mass tags. Here we report the development of a tantalum oxide nanoparticle (NP)-based mass tag for MC immunoassays. Uniform-sized amine-functionalized tantalum oxide NPs ( d ∼ 5.7 nm) were synthesized via a one-pot two-step reverse microemulsion method. These amine-functionalized NPs were further modified with azide groups by reacting with azide-PEG <subscript>2 k </subscript> succinimidyl carboxymethyl ester (NHS-PEG <subscript>2 k </subscript> -N <subscript>3</subscript> ) cross-linkers. The Ab-NP conjugates were prepared by reacting azide-functionalized NPs with dibenzocyclooctyne (DBCO)-functionalized primary or secondary Abs (DBCO-Ab) followed by fast protein size exclusion liquid chromatography (FPLC) purification. Three Ab-NP conjugates (TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -goat antimouse, TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -CD25, TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -CD196) were fabricated and tested in MC immunoassays. For the TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -goat antimouse conjugate, we showed that it can effectively detect abundant CD20 biomarkers on Ramos cells. For TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -CD25 and TaO <subscript>2</subscript> -PEG <subscript>2 k </subscript> -CD196 conjugates, we demonstrated that these Ab-NP conjugates could be integrated into the commercial Ab staining panels for high-dimensional single-cell immune profiling of human peripheral blood mononuclear cells.
- Subjects :
- Antibodies immunology
Antigen-Antibody Reactions
Antigens, CD20 immunology
Biomarkers analysis
Chelating Agents chemical synthesis
Humans
Leukocytes, Mononuclear chemistry
Oxides chemical synthesis
Antibodies chemistry
Antigens, CD20 analysis
Chelating Agents chemistry
Flow Cytometry
Immunoassay
Nanoparticles chemistry
Oxides chemistry
Tantalum chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1520-6882
- Volume :
- 92
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Analytical chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 32239915
- Full Text :
- https://doi.org/10.1021/acs.analchem.9b04970