Related Experiment Video

Updated: Apr 29, 2026

Peptide and Protein Quantification Using Automated Immuno-MALDI iMALDI
08:57

Peptide and Protein Quantification Using Automated Immuno-MALDI iMALDI

Published on: August 18, 2017

7.0K

Performance and additional benefits of MALDI-TOF-MS in M-protein detection in plasma cell disorders

Mengmeng Dong1, Hongying Ye1, Xiao Xiao2

  • 1Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.

Annals of Medicine
|April 28, 2026
PubMed
Abstract

Insights

Matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF-MS) offers a highly sensitive method for detecting monoclonal (M) proteins in plasma cell disorders. This advanced technique also identifies glycosylation and post-translational modifications, potentially correlating with treatment response.

Area of Science:

  • Clinical Chemistry
  • Mass Spectrometry
  • Oncology

Background:

  • Current monoclonal (M) protein detection methods like immunofixation electrophoresis (IFE), serum protein electrophoresis (SPEP), and serum free light chains (sFLC) have limitations in sensitivity and efficiency.
  • Plasma cell disorders (PCD) require accurate M-protein detection for diagnosis and monitoring.

Purpose of the Study:

  • To evaluate the performance and supplementary value of matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF-MS) for M-protein detection.
  • To compare MALDI-TOF-MS with existing diagnostic methods for PCD.

Main Methods:

  • M-protein detection in 137 newly diagnosed PCD patients using MALDI-TOF-MS.
  • Comparison of MALDI-TOF-MS results against SPEP, IFE, and sFLC as the gold standard.
  • Confirmation of discrepant results using urine IFE.
  • Analysis of sensitivity for light chains (κ, λ) and heavy chains (IgG, IgA).

Main Results:

  • MALDI-TOF-MS demonstrated a high M-protein detection rate (98.5%) compared to SPEP (75.9%), serum IFE (86.9%), sFLC (71.5%), and urine IFE (76.0%).
  • The sensitivity of MALDI-TOF-MS for κ and λ light chains was 75.8% and 80.0%, respectively; for IgG and IgA, it was 93.5% and 65.5%.
  • MALDI-TOF-MS identified LC glycosylation in 17 patients and other post-translational modifications (PTMs) in 4 patients, with observed correlations between glycosylation changes and treatment response.

Conclusions:

  • MALDI-TOF-MS is a reliable tool for M-protein detection, offering high sensitivity and the capability to identify LC glycosylation and PTMs.
  • Observed correlations between abnormal peak changes detected by MALDI-TOF-MS and treatment response suggest its potential utility in monitoring therapy effectiveness.
Keywords:
M-proteinMaldi-tof-MSglycosylationplasma cell disorderspost-translational modifications

More Related Videos

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery13:00

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Published on: April 17, 2012

15.9K
Matrix-assisted Laser Desorption/Ionization Time of Flight MALDI-TOF Mass Spectrometric Analysis of Intact Proteins Larger than 100 kDa07:49

Matrix-assisted Laser Desorption/Ionization Time of Flight MALDI-TOF Mass Spectrometric Analysis of Intact Proteins Larger than 100 kDa

Published on: September 9, 2013

81.7K

Related Concept Videos

MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
5.8K
Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
6.2K
Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

Matrix-Assisted Laser Desorption Ionization (MALDI)

Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
1.4K
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
7.5K