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. 2022 Feb 3;13:680. doi: 10.1038/s41467-022-28301-z

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a–d Western blot analyses of different fractions along the autophagic vesicle purification procedure, using antibodies against a autophagosomal markers (LC3B, p62, Atg16L1, and Atg9A), b ER-Golgi markers (TGN, LMAN1, SAR1a), c endosomal markers (Rab11b, EEA1), and d markers of the plasma-membrane (Stx4), extracellular vesicles (Alix) and nuclear extracts (TBP). N = 3 independent experiments. e Graph showing the cell component analysis, as false discovery rate (FDR)-corrected p-values, of the dynamic cargo (total of 393 proteins) that is enriched (up) or less abundant (down) in AVs after LTD, compared to control. f Graphical representation of proteins enriched in AVs upon LTD, with relation to the synapse. g Western blot analysis of PK-treated control and LTD-AVs, validating the presence of the proteins identified by the proteomic analyses in the autophagic vesicles. Postsynaptic density (PSD) fraction was used as reference. Graph showing the fold change of the normalized levels of the proteins validated by western blot, as a ratio of LTD to control. Cargo proteins were normalized to the levels of p62, which remains unaffected at the early phase of LTD. N = 3 independent AV preparations. Bars represent mean values ± SEM. Statistical analysis was performed using paired, two-tailed Student’s t-test (GluA1,N = 6, P = 0.0002; GluA2, N = 6, P = 0.0039; Pick1, N = 5, P = 0.011; SAP97, N = 5, P = 0.0179; FYN, N = 8, P < 0.0001; CamKIIa, N = 8, P < 0.0001; IL1RAPL1, N = 8, P = 0.0004; Adam22, N = 4, P = 0.0018; INA, N = 3, P = 0.0287; MYH10, N = 8, P < 0.0001; ITPKA, N = 6, P = 0.0006; KCC2, N = 4, P = 0. 0352; cofilin-1, N = 6, P = 0.005; dynamin, N = 6, P = 0.0005; p62, N = 6, P = 0.9809). All indicated molecular weights in a–d and g are in kDaltons (kD).