Article (Scientific journals)
Unique B-1 cells specific for both N-pyrrolated proteins and DNA evolve with apolipoprotein E deficiency
Lim, Sei-Young; Yamaguchi, Kosuke; ITAKURA, Masanori et al.
2022In Journal of Biological Chemistry, 298 (2), p. 101582
Peer Reviewed verified by ORBi
 

Files


Full Text
1-s2.0-S0021925822000229-main.pdf
Publisher postprint (1.25 MB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Abstract :
[en] Lysine N-pyrrolation, a posttranslational modification, which converts lysine residues to N ε -pyrrole-L-lysine, imparts electronegative properties to proteins, causing them to mimic DNA. Apolipoprotein E (apoE) has been identified as a soluble receptor for pyrrolated proteins (pyrP), and accelerated lysine N-pyrrolation has been observed in apoE-deficient (apoE−/−) hyperlipidemic mice. However, the impact of pyrP accumulation consequent to apoE deficiency on the innate immune response remains unclear. Here, we investigated B-1a cells known to produce germline-encoded immunoglobulin M (IgM) from mice deficient in apoE and identified a particular cell population that specifically produces IgM antibodies against pyrP and DNA. We demonstrated an expansion of B-1a cells involved in IgM production in the peritoneal cavity of apoE−/− mice compared with wild-type mice, consistent with a progressive increase of IgM response in the mouse sera. We found that pyrP exhibited preferential binding to B-1a cells and facilitated the production of IgM. B cell receptor analysis of pyrP-specific B-1a cells showed restricted usage of gene segments selected from the germline gene set; most sequences contained high levels of non-templated-nucleotide additions (N-additions) that could contribute to junctional diversity of B cell receptors. Finally, we report that a subset of monoclonal IgM antibodies against pyrP/DNA established from the apoE−/− mice also contained abundant N-additions. These results suggest that the accumulation of pyrP due to apoE deficiency may influence clonal diversity in the pyrP-specific B cell repertoire. The discovery of these unique B-1a cells for pyrP/DNA provides a key link connecting covalent protein modification, lipoprotein metabolism, and innate immunity.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Lim, Sei-Young
Yamaguchi, Kosuke
ITAKURA, Masanori  ;  University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Neuroinflammation Group
Chikazawa, Miho
Matsuda, Tomonari
Uchida, Koji
External co-authors :
yes
Language :
English
Title :
Unique B-1 cells specific for both N-pyrrolated proteins and DNA evolve with apolipoprotein E deficiency
Publication date :
2022
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, Us md
Volume :
298
Issue :
2
Pages :
101582
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 29 November 2023

Statistics


Number of views
14 (0 by Unilu)
Number of downloads
7 (0 by Unilu)

Scopus citations®
 
2
Scopus citations®
without self-citations
0
OpenCitations
 
1
OpenAlex citations
 
2

publications
2
supporting
0
mentioning
3
contrasting
0
Smart Citations
2
0
3
0
Citing PublicationsSupportingMentioningContrasting
View Citations

See how this article has been cited at scite.ai

scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.

Bibliography


Similar publications



Contact ORBilu