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Autophagy regulates long‐term cross‐presentation by murine dendritic cells


Ho, Nataschja I; Camps, Marcel G M; Verdoes, Martijn; Münz, Christian; Ossendorp, Ferry (2020). Autophagy regulates long‐term cross‐presentation by murine dendritic cells. European Journal of Immunology:Epub ahead of print.

Abstract

Autophagy has been reported to be involved in supporting antigen cross‐presentation by dendritic cells (DCs). We have shown that DCs have the ability to store antigen for a prolonged time in endo‐lysosomal compartments and thereby sustain MHCI antigen cross‐presentation to CD8+ T cells. In the current study, we investigated the role of autophagy in long‐term antigen presentation. We show that the autophagy machinery has a negative impact on storage of antigen in DCs. Atg5–/– DCs which are deficient in autophagy or DCs treated with common autophagy inhibitors showed enhanced antigen storage and antigen cross‐presentation. This augmented antigen cross‐presentation effect is independent of altered proteasome enzyme activity or MHCI surface expression on DCs. We visualized that the storage compartments are in close proximity to LC3 positive autophagosomes. Our results indicate that autophagosomes disrupt antigen storage in DCs and thereby regulate long‐term MHCI cross‐presentation.

Abstract

Autophagy has been reported to be involved in supporting antigen cross‐presentation by dendritic cells (DCs). We have shown that DCs have the ability to store antigen for a prolonged time in endo‐lysosomal compartments and thereby sustain MHCI antigen cross‐presentation to CD8+ T cells. In the current study, we investigated the role of autophagy in long‐term antigen presentation. We show that the autophagy machinery has a negative impact on storage of antigen in DCs. Atg5–/– DCs which are deficient in autophagy or DCs treated with common autophagy inhibitors showed enhanced antigen storage and antigen cross‐presentation. This augmented antigen cross‐presentation effect is independent of altered proteasome enzyme activity or MHCI surface expression on DCs. We visualized that the storage compartments are in close proximity to LC3 positive autophagosomes. Our results indicate that autophagosomes disrupt antigen storage in DCs and thereby regulate long‐term MHCI cross‐presentation.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Experimental Immunology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Uncontrolled Keywords:Immunology, Immunology and Allergy
Language:English
Date:22 December 2020
Deposited On:04 Feb 2021 14:04
Last Modified:04 Feb 2021 15:03
Publisher:Wiley-VCH Verlag
ISSN:0014-2980
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1002/eji.202048961
PubMed ID:33349928

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Embargo till: 2021-12-22