Abstract
Immunoglobulin G (IgG) is the most abundant serum antibody which structural characteristics and effector functions are modulated through the attachment of various sugar moieties called glycans. Composition of the IgG N-glycome changes with age of an individual and in different diseases. Variability of IgG glycosylation within a population is well studied and is known to be affected by both genetic and environmental factors. However, global inter-population differences in IgG glycosylation have never been properly addressed. Here we present population-specific N-glycosylation patterns of IgG, analyzed in 5 different populations totaling 10,482 IgG glycomes, and of IgG’s fragment crystallizable region (Fc), analyzed in 2,579 samples from 27 populations sampled across the world. Country of residence associated with many N-glycan features and the strongest association was with monogalactosylation where it explained 38% of variability. IgG monogalactosylation strongly correlated with the development level of a country, defined by United Nations health and socioeconomic development indicators, and with the expected lifespan. Subjects from developing countries had low levels of IgG galactosylation, characteristic for inflammation and ageing. Our results suggest that citizens of developing countries may be exposed to environmental factors that can cause low-grade chronic inflammation and the apparent increase in biological age.
Keywords
[RSTDPub], glycans, aging, immunoglobulin G, Fc glycosylation, mass spectrometry
Document Type
Journal Article
Date of Publication
2020
Publication Title
Aging
Publisher
Impact Journals
School
School of Medical and Health Sciences
RAS ID
32044
Funders
National Health and Medical Research Council of Australia
Grant Number
NHMRC Number : APP1112767
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Comments
Štambuk, J., Nakić, N., Vučković, F., Pučić-Baković, M., Razdorov, G., Trbojević-Akmačić, I., ... & Lauc, G. (2020). Global variability of the human IgG glycome. Aging, 12(15), 15222 - 15259. https://doi.org/10.18632/aging.103884