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Richard BC, Bayer TA, Lind SB, Shevchenko G, Bergquist J. A simplified and sensitive immunoprecipitation mass spectrometry protocol for the analysis of amyloid-beta peptides in brain tissue. Clin Mass Spectrom 2019; 14 Pt B:83-88. [PMID: 34917764 DOI: 10.1016/j.clinms.2019.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/09/2019] [Accepted: 07/09/2019] [Indexed: 10/26/2022]
Abstract
In the field of Alzheimer's disease, there is an urgent need for novel analytical tools to identify disease-specific biomarkers and to evaluate therapeutics. Preclinical trials commonly employ amyloid beta (Aβ) peptide signatures as a read-out. In this paper, we report a simplified and detailed protocol for robust immunoprecipitation of Aβ in brain tissue prior to mass spectrometric detection exemplified by a study using transgenic mice. The established method employed murine monoclonal and rabbit polyclonal antibodies and was capable of yielding well-reproducible peaks of high intensity with low background signal intensities corresponding to various Aβ forms.
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Key Words
- AD, Alzheimer’s disease
- APP, amyloid precursor protein
- Amyloid beta peptides
- Aβ, amyloid beta
- BSA, bovine serum albumine
- Brain
- FA, formic acid
- IP, Immunoprecipitation
- Immunoprecipitation
- MALDI-TOF MS
- MALDI-TOF MS, matrix-assisted-laser-desorption time-of-flight mass spectrometry
- MS, mass spectrometry
- PBS, phosphate buffered saline
- S/N, signal-to-noice ratio
- SA, sinapinic acid
- VD, volume of Dynabeads suspension
- Wt, wild type
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Affiliation(s)
- B C Richard
- Department of Neuropathology - AG Heppner, Charité - Universitätsmedizin Berlin, Campus Mitte, Charitäplatz 1, DE-10117 Berlin, Germany.,Department of Psychiatry and Psychotherapy, Universitätsmedizin Göttingen, von Siebold Strasse 5, DE-37075 Göttingen, Germany
| | - T A Bayer
- Department of Neuropathology - AG Heppner, Charité - Universitätsmedizin Berlin, Campus Mitte, Charitäplatz 1, DE-10117 Berlin, Germany.,Department of Psychiatry and Psychotherapy, Universitätsmedizin Göttingen, von Siebold Strasse 5, DE-37075 Göttingen, Germany
| | - S Bergström Lind
- Analytical Chemistry and Neurochemistry, Department of Chemistry - BMC, Uppsala University, Box 599, SE-75124 Uppsala, Sweden
| | - G Shevchenko
- Analytical Chemistry and Neurochemistry, Department of Chemistry - BMC, Uppsala University, Box 599, SE-75124 Uppsala, Sweden
| | - J Bergquist
- Analytical Chemistry and Neurochemistry, Department of Chemistry - BMC, Uppsala University, Box 599, SE-75124 Uppsala, Sweden
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