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Corrigendum: Bioactive Sr2+/Fe3+ co-substituted hydroxyapatite in cryogenically 3D printed porous scaffolds for bone tissue engineering (2021 Biofabrication 13 035007)

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Published 13 October 2021 • © 2021 IOP Publishing Ltd
, , Citation Liang Yang et al 2022 Biofabrication 14 019501 DOI 10.1088/1758-5090/ac278a

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This is a correction for 2021 Biofabrication 13 035007

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ckf@hust.edu.cn

hust_zxl@mail.hust.edu.cn

xiaodongguo@hust.edu.cn

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1 Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China

2 State Key Laboratory of Materials Processing and Die/Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China

Author notes

3 L Yang, I Ullah and K D Yu contributed equally to this work.

4 Authors to whom any correspondence should be addressed.

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Dates

  1. Received 15 September 2021
  2. Accepted 16 September 2021
  3. Published

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Method: Double-anonymous
Screened for originality? Yes

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Following publication of the paper, two inadvertent mistakes were noticed in figures 1(c) and 2(c). The graphs describing the effects of Sr2.5Fe7.5HA group on migration of MC3T3 cells for 24 h in figure 1(c) and Sr7.5Fe2.5HA group on migration of MC3T3 cells for 12 h in figure 2(c) were incorrect and thus replaced by the correct graphs as shown below. The rest of the figures are identical to the published version and the figure legends are not changed. The changed images do not affect the statistic results and conclusions of the published paper. We sincerely apologize for the inadvertent mistakes and for any inconvenience that it has caused.

Figure 3.

Figure 3.  In vitro osteogenesis evaluations of MC3T3 cells stimulated by each group of scaffold extracts. (a) ALP and Alizarin Red S staining of MC3T3 cells for 14 d culture; (b) cell viability after 1, 3 and 7 d culture; (c) and (d) cell migration analysis for 12 and 24 h incubation; (e) relative osteogenesis-related proteins expressions (ALP, OPN, OCN, RUNX2) detected by western blot for 14 d culture; (f) and (g) relative expressions of osteogenesis-related genes (ALP, OPN, OCN, RUNX2) determined by RT-qPCR for 7 and 14 d culture. All error bars indicate mean ± SD. *p < 0.05 versus HA group; # p < 0.05 versus Sr10HA group; ˆp < 0.05 versus Fe10HA group.

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Figure 6.

Figure 6.  In vitro osteogenesis evaluations of MC3T3 cells induced by RAW conditioned medium. (a) ALP and Alizarin Red S staining of MC3T3 cells for 14 d culture; (b) cell viability after 1, 3 and 7 d culture; (c) and (d) cell migration analysis for 12 and 24 h incubation; (e) relative osteogenesis-related proteins expressions (ALP, OPN, OCN, RUNX2) detected by western blot for 14 d culture; (f) and (g) relative expressions of osteogenesis-related genes (ALP, OPN, OCN, RUNX2) determined by RT-qPCR for 7 and 14 d culture. All error bars indicate mean ± SD. *p < 0.05 versus HA group; # p < 0.05 versus Sr10HA group; & p < 0.05 versus Sr2.5Fe7.5HA group; ˆp < 0.05 versus Fe10HA group.

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10.1088/1758-5090/ac278a