Targeting recipient dendritic cells with sialic acid-modified donor alloantigen prolongs skin

Sen, Monica, Peng, Qi, Ratnasothy, Kulachelvy, Ambrosini, Martino, Kalay, Hakan, Bazoer, Jordan, Adams, Kate E., El Ouazzani, Nouhad, Ababou, Abdessamad, Guiliano, David B., Saldana, Jose I., van Kooyk, Yvette, Lombardi, Giovanna and Smyth, Lesley (2025) Targeting recipient dendritic cells with sialic acid-modified donor alloantigen prolongs skin. International Journal of Molecular Sciences, 26 (13).

[thumbnail of PDF/A]
Preview
PDF (PDF/A)
Targeting recipient dendritic cells with sialic acid-modified_SmythL_accessible.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview

Abstract

Mature dendritic cells (DCs) are known to activate effector immune responses, whereas steady state immature DCs can induce tolerance. Several studies have targeted immature murine quiescent DCs in vivo with antigen, including donor alloantigens, for the induction of tolerance. Receptors expressed by specific DC subsets have been also targeted with antibodies linked with antigens to induce tolerance; for instance, in vivo targeting of the DCIR2+ DC subset with donor alloantigen resulted in long-term survival of heart and skin transplants. DCs also express sialic acid immunoglobulin-like lectin (Siglec) receptors, and these have been successfully targeted with myelin oligiodendrocyte glycoprotein (MOG) antigen to induce tolerance in experimental autoimmune encephalomyelitis (EAE). We investigated, in a mismatched model of skin transplant (B6Kd into B6 recipient mice), whether targeting a sialylated alloantigen Kd (Sia-Kd) to Siglecs on recipient DCs promoted transplant survival. The injection of α2,3 Sia-Kd into B6 recipient mice prior to B6Kd skin transplantation, by binding to Batf3 dependent DCs, resulted in prolonged skin graft survival and an increase in CD4+CD62L+Foxp3+ Tregs. Targeting Siglecs on DC subsets in vivo represents a novel way of improving transplant survival.

Item Type: Article
Identifier: 10.3390/ijms26136168
Keywords: tolerance; dendritic cells; siglecs; allorecognition
Subjects: Natural sciences > Cell and molecular biology
Depositing User: Lesley Smyth
Date Deposited: 08 Jul 2025 12:28
Last Modified: 08 Jul 2025 12:45
URI: https://repository.uwl.ac.uk/id/eprint/13839
Sustainable Development Goals: Goal 3: Good Health and Well-Being

Downloads

Downloads per month over past year

Actions (login required)

View Item View Item

Menu