Campbell L, Simpson D, Ramasamy K, Sadler R. Using quantitative immunoprecipitation mass spectrometry (QIP-MS) to identify low level monoclonal proteins.
Clin Biochem 2021;
95:81-83. [PMID:
34058191 DOI:
10.1016/j.clinbiochem.2021.05.012]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/19/2021] [Accepted: 05/26/2021] [Indexed: 10/21/2022]
Abstract
Mass spectrometry has recently been proposed as a novel sensitive screening tool for monoclonal gammopathies. In a small study we have tested the ability of quantitative immunoprecipitation mass spectrometry (QIP-MS) to identify low level monoclonal immunoglobulins not currently detected by the initial serum protein electrophoresis (SPEP) screen. QIP-MS positively identified the primary monoclonal immunoglobulins in all 11 patient samples alongside additional monoclonal immunoglobulins in a subset of patient samples. We conclude that QIP-MS has clinical utility as a first-line screening tool for monoclonal gammopathy investigation, identifying monoclonality in patients with higher sensitivity and resolution compared to the current standard methods.
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