The potential effect of BMSCs with miR‐27a in improving steroid-induced osteonecrosis of the femoral head

Abstract

Steroid induced osteonecrosis of the femoral head (ONFH) frequently leads to femoral head collapse and subsequent hip arthritis. This study aimed to investigate the potential therapeutic mechanism of miR‐27a on steroid-induced ONFH. Levels of IL-6, TNF-α, miR-27a, Runx2, PPAR-γ and ApoA5 were first examined in bone marrow tissues from steroid-induced ONFH and controls. Subsequently, we overexpressed or knocked down miR-27a in bone marrow mesenchymal stem cells (BMSCs) and detected cell proliferation, osteogenic differentiation, adipogenic differentiation. In addition, miR-27a mimics and BMSCs were injected into the established steroid-induced ONFH rats, and the osteoprotective effects of both were evaluated. Dual luciferase reporter was used to test the targeting effect of miR-27a-3p and PPARG. miR-27a and Runx2 were lowly expressed in steroid-induced ONFH, PPAR-γ and ApoA5 were highly expressed. Overexpression of miR-27a in BMSCs promoted cell proliferation and osteogenic differentiation, inhibited adipogenic differentiation. Furthermore, increasing miR-27a and BMSCs obviously reduced bone loss in steroid induced ONFH rats. The expressions of Runx2 in BMSCs and steroid-induced ONFH rats was significantly up‐regulated, while IL-6, TNF-α, PPAR-γ and ApoA5 were down‐regulated with miR-27a overexpression. Additionally, PPARG was the target of miR-27a-3p. The results of the present study reveal a role for miR-27a in promoting osteogenesis and may have a synergistic effect with BMSCs.

LncRNA-H19 Promotes Adipogenic Differentiation Disorder by Regulating miR-130b-3p/PPARγ Axis in Steroid-induced Osteonecrosis of Femoral Head

“…Our previous study found that association of gene variants of transcription factors PPARγ with the development of the femoral head osteonecrosis(Song et al 2017). Several studies have also reported the abnormal expression and related regulatory effects of PPARγ in osteonecrosis of the femoral head(Zhao et al 2019;Cui et al 2022)(Fu et al 2016). In the current study, discovered that PPARγ expression was notably elevated in both the femoral head tissues and BMSCs of patients with SONFH.…”