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Anti-myelin-associated glycoprotein (MAG) neuropathy is mediated by the binding of IgM M-proteins to the human natural killer-1 epitope of several glycoconjugates, including MAG and phosphacan. We recently reported that IgM M-proteins with a higher ratio of anti-phosphacan titer to anti-MAG titer (P/M ratio) were associated with a progressive clinical course. Herein, we investigated the temporal variability of the P/M ratio. The results showed that P/M ratios in worsened cases were significantly increased relative to stable or improved cases. Thus, temporal variability in the specificity of IgM M-proteins may be related to the disease course of anti-MAG neuropathy.
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http://dx.doi.org/10.1016/j.jneuroim.2019.577127 | DOI Listing |
Front Immunol
August 2025
Department of Surgery, Faculty of Medicine and Dentistry, College of Health Sciences, University Alberta, Edmonton, AB, Canada.
Introduction: SARS-CoV-2 is continuing to prevail as an endemic virus, and therefore, we need a next-generation vaccine that prevents SARS-CoV-2 infections, broadly protects against multiple CoVs, and induces long-term local and systemic immunity. To address that need, we have designed a mixed lipopeptide-based pan-coronavirus (LP) vaccine based on T and B cell epitopes derived from highly conserved and functional regions of the SARS-CoV-2 spike (S), nucleocapsid (N), and membrane (M) proteins.
Methods: Male C57BL/6 mice (n=5 per group) were immunized intranasally twice, 14 days apart, with the LP vaccine candidates, which consisted of seven lipopeptides (LP1-LP7), with or without HKCC (heat-killed ), a novel mucosal adjuvant.
Front Immunol
July 2025
The Nephrology Department, Lihuili Hospital Affiliated with Ningbo University, Ningbo, China.
Introduction: IgG4-related disease (IgG4-RD) is a newly classified but poorly understood immune-medicated systemic disease. Monoclonal gammopathy encompasses a spectrum of disorders driven by clonal plasma cell proliferation, leading to the presence of monoclonal immunoglobulins (M-proteins) in serum or urine. IgG4-related nephropathy with associated monoclonal gammopathy is rare, and its etiology is poorly understood.
View Article and Find Full Text PDFJ Coll Physicians Surg Pak
April 2025
Department of Geriatrics, Affiliated Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Currently, the methods used to detect M-protein such as SPEP (serum M-protein electrophoresis), IFE (immunofixation electrophoresis), and sFLC (serum free light chain) assay are hyposensitive, laborious, time-consuming, and expensive. In this study, the authors assessed the performance of MALDI-TOF-MS in the detection of M-protein in geriatrics. With IFE as the gold standard, the specificity, sensitivity, and consistency of MALDI-TOF-MS were 92.
View Article and Find Full Text PDFPlant Biotechnol J
March 2025
BioSystems Design Lab, Department of Medicine, College of Medicine, Chung-Ang University, Seoul, Korea.
Epithelial cell adhesion molecule (EpCAM) fused to IgG, IgA and IgM Fc domains was expressed to create IgG, IgA and IgM-like structures as anti-cancer vaccines in Nicotiana tabacum. High-mannose glycan structures were generated by adding a C-terminal endoplasmic reticulum (ER) retention motif (KDEL) to the Fc domain (FcK) to produce EpCAM-Fc and EpCAM-FcK proteins in transgenic plants via Agrobacterium-mediated transformation. Cross-fertilization of EpCAM-Fc (FcK) transgenic plants with Joining chain (J-chain, J and JK) transgenic plants led to stable expression of large quaternary EpCAM-IgA Fc (EpCAM-A) and IgM-like (EpCAM-M) proteins.
View Article and Find Full Text PDFJ Appl Lab Med
March 2025
The Binding Site, part of Thermo Fisher Scientific, Rochester, MN, United States.
Background: Therapeutic monoclonal antibodies (t-mAbs) may interfere with electrophoresis-based methods used to monitor multiple myeloma (MM), which can create inaccurate results. Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry is an alternative to gels distinguishing between endogenous M-proteins and t-mAbs based on molecular mass.
Methods: Serum samples (n = 109) from 34 MM patients receiving Dara-KRd were collected 14 or 28 days postdaratumumab administration.