Cell attachment and differentiation on biomaterials might be enhanced by surface modification techniques. The main aim of this study was to improve stem cell/material interaction by pressure cold atmospheric plasma (CAP). We developed a combination of electrospun poly (ε‐caprolactone) (PCL)‐chitosan (CTS) and PCL‐carboxy methyl chitosan (CMC) scaffolds. In order to make nanofiber surfaces more appropriate for mesenchymal stem cell (MSC) attachment and proliferation, CAP was used. Proliferation and cartilage differentiation of MSCs were then evaluated during 21 days. Biocompatibility test, scanning electron microscopy (SEM) analysis, 3‐[4,5‐dimethylthiazol‐2yl]‐2, 5‐diphenyl tetrazolium bromide (MTT) and 4′,6‐diamidino‐2‐phenylindole (DAPI) staining were performed. After 21 days, induction of cartilage differentiation was approved through expression of SRY‐Box 9 (SOX9) and collagen type II (COL2) genes by reverse transcription polymerase chain reaction (RT‐PCR), and COL2 protein expression was accordingly confirmed by immunocytochemistry (ICC). Thus, our data showed the PCL/CMC scaffolds can support and induce the differentiation of MSC to cartilage‐like cells.

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The article Cold Atmosphere Plasma Modification on Beta-Carotene-Loaded Nanofibers to Enhance Osteogenic Differentiation, written by Yasamin Moradi, Seyed Alireza Atyabi, Ali Ghiassadin, Hadi Bakhshi, Shiva Irani, Seyed Mohammad Atyabi, and Neda Dadgar, was mistakenly originally published without open access. After publication in Vol.23, No.1, page 18–27 this was corrected and the article was made an open access publication. Therefore, the copyright of the article has been changed to and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (https://doi.org/10.1007/s12221-021-0033-y), which permits use, duplication, 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 original article has been corrected.