Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
JCR Impact Factor (IF) – 2.1
5-Year Impact Factor – 2.2
Scopus CiteScore – 3.4 (CiteScore Tracker 3.4)
Index Copernicus  – 161.11; MEiN – 140 pts

ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
Periodicity – monthly

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Advances in Clinical and Experimental Medicine

2018, vol. 27, nr 7, July, p. 971–977

doi: 10.17219/acem/70789

Publication type: original article

Language: English

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Evaluation of the secretion and release of vascular endothelial growth factor from two-dimensional culture and three-dimensional cell spheroids formed with stem cells and osteoprecursor cells

Hyunjin Lee1,A,B,C,D,E,F, Sung-Il Lee1,A,B,C,D,E,F, Youngkyung Ko1,A,B,C,D,E,F, Jun-Beom Park1,A,B,C,D,E,F

1 Department of Periodontics, College of Medicine, Catholic University of Korea, Seoul, the Republic of Korea

Abstract

Background. Co-culture has been applied in cell therapy, including stem cells, and has been reported to give enhanced functionality.
Objectives. In this study, stem-cell spheroids were formed in concave micromolds at different ratios of stem cells to osteoprecursor cells, and the amount of secretion of vascular endothelial growth factor (VEGF) was evaluated.
Material and Methods. Gingiva-derived stem cells and osteoprecursor cells in the amount of 6 × 105 were seeded on a 24-well culture plate or concave micromolds. The ratios of stem cells to osteoprecursor cells included: 0:4 (group 1), 1:3 (group 2), 2:2 (group 3), 3:1 (group 4), and 4:0 (group 5).
Results. The morphology of cells in a 2-dimensional culture (groups 1–5) showed a fibroblast-like appearance. The secretion of VEGF increased with the increase in stem cells, and a statistically significant increase was noted in groups 3, 4 and 5 when compared with the media-only group (p < 0.05). Osteoprecursor cells formed spheroids in concave microwells, and no noticeable change in the morphology was noted with the increase in stem cells. Spheroids containing stem cells were positive for the stem-cell markers SSEA-4. The secretion of VEGF from cell spheroids increased with the increase in stem cells.
Conclusion. This study showed that cell spheroids formed with stem cells and osteoprecursor cells with different ratios, using microwells, had paracrine effects on the stem cells. The secretion of VEGF increased with the increase in stem cells. This stem-cell spheroid may be applied for tissue-engineering purposes.

Key words

vascular endothelial growth factor, osteoblast, co-culture techniques, cellular spheroids, stem cell research

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