Acta chirurgiae orthopaedicae
et traumatologiae Čechoslovaca

Acta Chir Orthop Traumatol Cech. 2022; 89(5):370-375 | DOI: 10.55095/achot2022/059

NiTi Alloys Exposure Alters miR-124 Expression in Physiological and Osteoarthritic OsteoblastsOriginal papers

M. ŠTEFANČÍK¹, L. VÁLKOVÁ¹, J. VEVERKOVÁ¹, A. WEISER², A. DLOUHݲ, L. RYBA^3,*, M. PÁVKOVÁ GOLDBERGOVÁ¹

¹ Institute of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic

² Academy of Sciences CR, Institute of Physics of Materials, Brno, Czech Republic

³ Department of Orthopaedics, Faculty of Medicine, Masaryk University, University Hospital, Brno, Czech Republic

PURPOSE OF THE STUDY:
Nitinol (NiTi) is a biomaterial widely used in medicine based on super-elastic and shape memory properties. miR-124 has a key role in inflammatory process, osteoblasts differentiation, and mineralization. The aim of study was evaluating the differences in gene expression of miR-124 of human physiological osteoblasts (HOB) and human osteoarthritic osteoblasts (OSBA) as a response to NiTi alloy in different heat treatments.

MATERIAL AND METHODS:
The cells were cultivated with NiTi discs with/without addition of bacterial lipopolysaccharide (LPS) for 72 hours. MicroRNAs were isolated, underwent reverse transcription and were analyzed by RT-PCR.

RESULTS:
As a response to LPS, HOB overexpressed miR-124, while in OSBA expression change did not occur. Overexpression was also observed in both cell lines as a response to hydrogen and helium treated NiTi discs. HOB expressed significantly higher amount of miR-124 than OSBA as a response to hydrogen treatment of NiTi discs. In addition, hydrogen treatment caused significantly higher expression in HOB than LPS. The combination of NiTi disc and LPS treatment in HOB didn't cause any expression changes. Comparing to LPS-only treatment, the expression in HOB with combination of LPS and alloy was significantly lower. In OSBA, the expression was increased by the combination of LPS and hydrogen disc, in case of helium disc, the expression was decreased.

CONCLUSIONS:
In conclusion, human physiological and osteoarthritic osteoblasts respond to NiTi alloy with both surface (hydrogen and helium atmosphere) treatment by overexpression of miR-124. The effect of LPS as inflammatory modulator suggests the presence of an "anti-inflammatory preconditioning" in osteoarthritic osteoblasts, as physiological osteoblasts overexpression was significantly higher.

Keywords: nitinol, osteoblast, miR-124, lipopolysaccharide

Published: October 15, 2022  Show citation