Addendum: Engineered extracellular vesicles from human periodontal-ligament stem cells increase VEGF/VEGFR2 expression during bone regeneration

Abstract
An Addendum on Addendum: Engineered extracellular vesicles from human periodontal-ligament stem cells increase VEGF/VEGFR2 expression during bone regeneration by Pizzicannella J, Gugliandolo A, Orsini T, Fontana A, Ventrella A, Mazzon E, Bramanti P, Diomede F and Trubiani O (2019). Front. Physiol. 10:512. doi: 10.3389/fphys.2019.00512 In the published article, we would to like to add the merge relative to panel C1 and C2 of the Figure 2 as Supplementary Figure S3. The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated. All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher. The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fphys.2023.1148929/full#supplementary-material Supplementary Figure S3 | Confocal laser scanning microscopy figure. Keywords: mesenchymal stem cells, bone regeneration, VEGF, VEGFR2, collagen membrane, extracellular vesicles, polyethylenimine Citation: Pizzicannella J, Gugliandolo A, Orsini T, Fontana A, Ventrella A, Mazzon E, Bramanti P, Diomede F and Trubiani O (2023) Addendum: Engineered extracellular vesicles from human periodontal-ligament stem cells increase VEGF/VEGFR2 expression during bone regeneration. Front. Physiol. 14:1148929. doi: 10.3389/fphys.2023.1148929 Received: 23 January 2023; Accepted: 24 February 2023; Published: 23 March 2023. Edited and reviewed by: Copyright © 2023 Pizzicannella, Gugliandolo, Orsini, Fontana, Ventrella, Mazzon, Bramanti, Diomede and Trubiani. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. *Correspondence: Emanuela Mazzon, emanuela.mazzon@irccsme.it